* [PATCH v6 1/8] i2c: core: let adapters be notified of client attach/detach
2023-01-05 14:02 [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
@ 2023-01-05 14:03 ` Tomi Valkeinen
2023-01-08 3:13 ` Laurent Pinchart
2023-01-05 14:03 ` [PATCH v6 2/8] i2c: add I2C Address Translator (ATR) support Tomi Valkeinen
` (7 subsequent siblings)
8 siblings, 1 reply; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-05 14:03 UTC (permalink / raw)
To: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen
Cc: Mauro Carvalho Chehab, Peter Rosin, Liam Girdwood, Mark Brown,
Sakari Ailus, Laurent Pinchart, Michael Tretter, Shawn Tu,
Hans Verkuil, Mike Pagano, Krzysztof Hałasa, Marek Vasut,
Luca Ceresoli, Tomi Valkeinen
From: Luca Ceresoli <luca@lucaceresoli.net>
An adapter might need to know when a new device is about to be
added. This will soon bee needed to implement an "I2C address
translator" (ATR for short), a device that propagates I2C transactions
with a different slave address (an "alias" address). An ATR driver
needs to know when a slave is being added to find a suitable alias and
program the device translation map.
Add an attach/detach callback pair to allow adapter drivers to be
notified of clients being added and removed.
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
drivers/i2c/i2c-core-base.c | 21 ++++++++++++++++++++-
include/linux/i2c.h | 16 ++++++++++++++++
2 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 7539b0740351..8a0888ba89e5 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -916,6 +916,7 @@ int i2c_dev_irq_from_resources(const struct resource *resources,
struct i2c_client *
i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
{
+ const struct i2c_attach_operations *attach_ops;
struct i2c_client *client;
int status;
@@ -967,15 +968,24 @@ i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *inf
}
}
+ attach_ops = adap->attach_ops;
+
+ if (attach_ops && attach_ops->attach_client &&
+ attach_ops->attach_client(adap, info, client))
+ goto out_remove_swnode;
+
status = device_register(&client->dev);
if (status)
- goto out_remove_swnode;
+ goto out_detach_client;
dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",
client->name, dev_name(&client->dev));
return client;
+out_detach_client:
+ if (attach_ops && attach_ops->detach_client)
+ attach_ops->detach_client(adap, client);
out_remove_swnode:
device_remove_software_node(&client->dev);
out_err_put_of_node:
@@ -997,9 +1007,18 @@ EXPORT_SYMBOL_GPL(i2c_new_client_device);
*/
void i2c_unregister_device(struct i2c_client *client)
{
+ const struct i2c_attach_operations *attach_ops;
+ struct i2c_adapter *adap;
+
if (IS_ERR_OR_NULL(client))
return;
+ adap = client->adapter;
+ attach_ops = adap->attach_ops;
+
+ if (attach_ops && attach_ops->detach_client)
+ attach_ops->detach_client(adap, client);
+
if (client->dev.of_node) {
of_node_clear_flag(client->dev.of_node, OF_POPULATED);
of_node_put(client->dev.of_node);
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index f7c49bbdb8a1..9a385b6de388 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -584,6 +584,21 @@ struct i2c_lock_operations {
void (*unlock_bus)(struct i2c_adapter *adapter, unsigned int flags);
};
+/**
+ * struct i2c_attach_operations - callbacks to notify client attach/detach
+ * @attach_client: Notify of new client being attached
+ * @detach_client: Notify of new client being detached
+ *
+ * Both ops are optional.
+ */
+struct i2c_attach_operations {
+ int (*attach_client)(struct i2c_adapter *adapter,
+ const struct i2c_board_info *info,
+ const struct i2c_client *client);
+ void (*detach_client)(struct i2c_adapter *adapter,
+ const struct i2c_client *client);
+};
+
/**
* struct i2c_timings - I2C timing information
* @bus_freq_hz: the bus frequency in Hz
@@ -726,6 +741,7 @@ struct i2c_adapter {
/* data fields that are valid for all devices */
const struct i2c_lock_operations *lock_ops;
+ const struct i2c_attach_operations *attach_ops;
struct rt_mutex bus_lock;
struct rt_mutex mux_lock;
--
2.34.1
^ permalink raw reply related [flat|nested] 33+ messages in thread* Re: [PATCH v6 1/8] i2c: core: let adapters be notified of client attach/detach
2023-01-05 14:03 ` [PATCH v6 1/8] i2c: core: let adapters be notified of client attach/detach Tomi Valkeinen
@ 2023-01-08 3:13 ` Laurent Pinchart
2023-01-08 9:24 ` Tomi Valkeinen
0 siblings, 1 reply; 33+ messages in thread
From: Laurent Pinchart @ 2023-01-08 3:13 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut, Luca Ceresoli
Hi Tomi,
Thank you for the patch.
On Thu, Jan 05, 2023 at 04:03:00PM +0200, Tomi Valkeinen wrote:
> From: Luca Ceresoli <luca@lucaceresoli.net>
>
> An adapter might need to know when a new device is about to be
> added. This will soon bee needed to implement an "I2C address
> translator" (ATR for short), a device that propagates I2C transactions
> with a different slave address (an "alias" address). An ATR driver
> needs to know when a slave is being added to find a suitable alias and
> program the device translation map.
>
> Add an attach/detach callback pair to allow adapter drivers to be
> notified of clients being added and removed.
I've asked in the review of v6 if we could instead use the
BUS_NOTIFY_ADD_DEVICE and BUS_NOTIFY_DEL_DEVICE bus notifiers. There's
been a follow up discussion with Andy, but no reply from you AFAICS.
Have you given this a try ? It's not a mandatory requirement, but if it
can't be done (or shouldn't be done), I'd like to know why.
> Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> ---
> drivers/i2c/i2c-core-base.c | 21 ++++++++++++++++++++-
> include/linux/i2c.h | 16 ++++++++++++++++
> 2 files changed, 36 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
> index 7539b0740351..8a0888ba89e5 100644
> --- a/drivers/i2c/i2c-core-base.c
> +++ b/drivers/i2c/i2c-core-base.c
> @@ -916,6 +916,7 @@ int i2c_dev_irq_from_resources(const struct resource *resources,
> struct i2c_client *
> i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
> {
> + const struct i2c_attach_operations *attach_ops;
> struct i2c_client *client;
> int status;
>
> @@ -967,15 +968,24 @@ i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *inf
> }
> }
>
> + attach_ops = adap->attach_ops;
> +
> + if (attach_ops && attach_ops->attach_client &&
> + attach_ops->attach_client(adap, info, client))
> + goto out_remove_swnode;
> +
> status = device_register(&client->dev);
> if (status)
> - goto out_remove_swnode;
> + goto out_detach_client;
>
> dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",
> client->name, dev_name(&client->dev));
>
> return client;
>
> +out_detach_client:
> + if (attach_ops && attach_ops->detach_client)
> + attach_ops->detach_client(adap, client);
> out_remove_swnode:
> device_remove_software_node(&client->dev);
> out_err_put_of_node:
> @@ -997,9 +1007,18 @@ EXPORT_SYMBOL_GPL(i2c_new_client_device);
> */
> void i2c_unregister_device(struct i2c_client *client)
> {
> + const struct i2c_attach_operations *attach_ops;
> + struct i2c_adapter *adap;
> +
> if (IS_ERR_OR_NULL(client))
> return;
>
> + adap = client->adapter;
> + attach_ops = adap->attach_ops;
> +
> + if (attach_ops && attach_ops->detach_client)
> + attach_ops->detach_client(adap, client);
> +
> if (client->dev.of_node) {
> of_node_clear_flag(client->dev.of_node, OF_POPULATED);
> of_node_put(client->dev.of_node);
> diff --git a/include/linux/i2c.h b/include/linux/i2c.h
> index f7c49bbdb8a1..9a385b6de388 100644
> --- a/include/linux/i2c.h
> +++ b/include/linux/i2c.h
> @@ -584,6 +584,21 @@ struct i2c_lock_operations {
> void (*unlock_bus)(struct i2c_adapter *adapter, unsigned int flags);
> };
>
> +/**
> + * struct i2c_attach_operations - callbacks to notify client attach/detach
> + * @attach_client: Notify of new client being attached
> + * @detach_client: Notify of new client being detached
> + *
> + * Both ops are optional.
> + */
> +struct i2c_attach_operations {
> + int (*attach_client)(struct i2c_adapter *adapter,
> + const struct i2c_board_info *info,
> + const struct i2c_client *client);
> + void (*detach_client)(struct i2c_adapter *adapter,
> + const struct i2c_client *client);
> +};
> +
> /**
> * struct i2c_timings - I2C timing information
> * @bus_freq_hz: the bus frequency in Hz
> @@ -726,6 +741,7 @@ struct i2c_adapter {
>
> /* data fields that are valid for all devices */
> const struct i2c_lock_operations *lock_ops;
> + const struct i2c_attach_operations *attach_ops;
> struct rt_mutex bus_lock;
> struct rt_mutex mux_lock;
>
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 1/8] i2c: core: let adapters be notified of client attach/detach
2023-01-08 3:13 ` Laurent Pinchart
@ 2023-01-08 9:24 ` Tomi Valkeinen
0 siblings, 0 replies; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-08 9:24 UTC (permalink / raw)
To: Laurent Pinchart
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut, Luca Ceresoli
On 08/01/2023 05:13, Laurent Pinchart wrote:
> Hi Tomi,
>
> Thank you for the patch.
>
> On Thu, Jan 05, 2023 at 04:03:00PM +0200, Tomi Valkeinen wrote:
>> From: Luca Ceresoli <luca@lucaceresoli.net>
>>
>> An adapter might need to know when a new device is about to be
>> added. This will soon bee needed to implement an "I2C address
>> translator" (ATR for short), a device that propagates I2C transactions
>> with a different slave address (an "alias" address). An ATR driver
>> needs to know when a slave is being added to find a suitable alias and
>> program the device translation map.
>>
>> Add an attach/detach callback pair to allow adapter drivers to be
>> notified of clients being added and removed.
>
> I've asked in the review of v6 if we could instead use the
> BUS_NOTIFY_ADD_DEVICE and BUS_NOTIFY_DEL_DEVICE bus notifiers. There's
> been a follow up discussion with Andy, but no reply from you AFAICS.
> Have you given this a try ? It's not a mandatory requirement, but if it
> can't be done (or shouldn't be done), I'd like to know why.
Sorry, I meant to mention this in the cover letter, but forgot:
I haven't looked at the bus notifiers yet, but will have a look. I
wanted to send a new revision due to the large amount of changes already
done.
Tomi
^ permalink raw reply [flat|nested] 33+ messages in thread
* [PATCH v6 2/8] i2c: add I2C Address Translator (ATR) support
2023-01-05 14:02 [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
2023-01-05 14:03 ` [PATCH v6 1/8] i2c: core: let adapters be notified of client attach/detach Tomi Valkeinen
@ 2023-01-05 14:03 ` Tomi Valkeinen
2023-01-05 14:03 ` [PATCH v6 3/8] dt-bindings: media: add TI DS90UB913 FPD-Link III Serializer Tomi Valkeinen
` (6 subsequent siblings)
8 siblings, 0 replies; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-05 14:03 UTC (permalink / raw)
To: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen
Cc: Mauro Carvalho Chehab, Peter Rosin, Liam Girdwood, Mark Brown,
Sakari Ailus, Laurent Pinchart, Michael Tretter, Shawn Tu,
Hans Verkuil, Mike Pagano, Krzysztof Hałasa, Marek Vasut,
Luca Ceresoli, Tomi Valkeinen
From: Luca Ceresoli <luca@lucaceresoli.net>
An ATR is a device that looks similar to an i2c-mux: it has an I2C
slave "upstream" port and N master "downstream" ports, and forwards
transactions from upstream to the appropriate downstream port. But is
is different in that the forwarded transaction has a different slave
address. The address used on the upstream bus is called the "alias"
and is (potentially) different from the physical slave address of the
downstream chip.
Add a helper file (just like i2c-mux.c for a mux or switch) to allow
implementing ATR features in a device driver. The helper takes care or
adapter creation/destruction and translates addresses at each transaction.
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
Documentation/i2c/index.rst | 1 +
Documentation/i2c/muxes/i2c-atr.rst | 83 +++++
MAINTAINERS | 8 +
drivers/i2c/Kconfig | 9 +
drivers/i2c/Makefile | 1 +
drivers/i2c/i2c-atr.c | 501 ++++++++++++++++++++++++++++
include/linux/i2c-atr.h | 118 +++++++
7 files changed, 721 insertions(+)
create mode 100644 Documentation/i2c/muxes/i2c-atr.rst
create mode 100644 drivers/i2c/i2c-atr.c
create mode 100644 include/linux/i2c-atr.h
diff --git a/Documentation/i2c/index.rst b/Documentation/i2c/index.rst
index 6270f1fd7d4e..aaf33d1315f4 100644
--- a/Documentation/i2c/index.rst
+++ b/Documentation/i2c/index.rst
@@ -16,6 +16,7 @@ Introduction
instantiating-devices
busses/index
i2c-topology
+ muxes/i2c-atr
muxes/i2c-mux-gpio
i2c-sysfs
diff --git a/Documentation/i2c/muxes/i2c-atr.rst b/Documentation/i2c/muxes/i2c-atr.rst
new file mode 100644
index 000000000000..c7e060ca682d
--- /dev/null
+++ b/Documentation/i2c/muxes/i2c-atr.rst
@@ -0,0 +1,83 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=====================
+Kernel driver i2c-atr
+=====================
+
+Author: Luca Ceresoli <luca@lucaceresoli.net>
+
+Description
+-----------
+
+An I2C Address Translator (ATR) is a device with an I2C slave parent
+("upstream") port and N I2C master child ("downstream") ports, and
+forwards transactions from upstream to the appropriate downstream port
+with a modified slave address. The address used on the parent bus is
+called the "alias" and is (potentially) different from the physical
+slave address of the child bus. Address translation is done by the
+hardware.
+
+An ATR looks similar to an i2c-mux except:
+ - the address on the parent and child busses can be different
+ - there is normally no need to select the child port; the alias used on the
+ parent bus implies it
+
+The ATR functionality can be provided by a chip with many other
+features. This file provides a helper to implement an ATR within your
+driver.
+
+The ATR creates a new I2C "child" adapter on each child bus. Adding
+devices on the child bus ends up in invoking the driver code to select
+an available alias. Maintaining an appropriate pool of available aliases
+and picking one for each new device is up to the driver implementer. The
+ATR maintains an table of currently assigned alias and uses it to modify
+all I2C transactions directed to devices on the child buses.
+
+A typical example follows.
+
+Topology::
+
+ Slave X @ 0x10
+ .-----. |
+ .-----. | |---+---- B
+ | CPU |--A--| ATR |
+ `-----' | |---+---- C
+ `-----' |
+ Slave Y @ 0x10
+
+Alias table:
+
+.. table::
+
+ ====== =====
+ Client Alias
+ ====== =====
+ X 0x20
+ Y 0x30
+ ====== =====
+
+Transaction:
+
+ - Slave X driver sends a transaction (on adapter B), slave address 0x10
+ - ATR driver rewrites messages with address 0x20, forwards to adapter A
+ - Physical I2C transaction on bus A, slave address 0x20
+ - ATR chip propagates transaction on bus B with address translated to 0x10
+ - Slave X chip replies on bus B
+ - ATR chip forwards reply on bus A
+ - ATR driver rewrites messages with address 0x10
+ - Slave X driver gets back the msgs[], with reply and address 0x10
+
+Usage:
+
+ 1. In your driver (typically in the probe function) add an ATR by
+ calling i2c_atr_new() passing your attach/detach callbacks
+ 2. When the attach callback is called pick an appropriate alias,
+ configure it in your chip and return the chosen alias in the
+ alias_id parameter
+ 3. When the detach callback is called, deconfigure the alias from
+ your chip and put it back in the pool for later usage
+
+I2C ATR functions and data structures
+-------------------------------------
+
+.. kernel-doc:: include/linux/i2c-atr.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 1daadaa4d48b..ba716f2861cf 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9563,6 +9563,14 @@ L: linux-acpi@vger.kernel.org
S: Maintained
F: drivers/i2c/i2c-core-acpi.c
+I2C ADDRESS TRANSLATOR (ATR)
+M: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+R: Luca Ceresoli <luca.ceresoli@bootlin.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/i2c-atr.c
+F: include/linux/i2c-atr.h
+
I2C CONTROLLER DRIVER FOR NVIDIA GPU
M: Ajay Gupta <ajayg@nvidia.com>
L: linux-i2c@vger.kernel.org
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index 438905e2a1d0..c6d1a345ea6d 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -71,6 +71,15 @@ config I2C_MUX
source "drivers/i2c/muxes/Kconfig"
+config I2C_ATR
+ tristate "I2C Address Translator (ATR) support"
+ help
+ Enable support for I2C Address Translator (ATR) chips.
+
+ An ATR allows accessing multiple I2C busses from a single
+ physical bus via address translation instead of bus selection as
+ i2c-muxes do.
+
config I2C_HELPER_AUTO
bool "Autoselect pertinent helper modules"
default y
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index c1d493dc9bac..3f71ce4711e3 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -13,6 +13,7 @@ i2c-core-$(CONFIG_OF) += i2c-core-of.o
obj-$(CONFIG_I2C_SMBUS) += i2c-smbus.o
obj-$(CONFIG_I2C_CHARDEV) += i2c-dev.o
obj-$(CONFIG_I2C_MUX) += i2c-mux.o
+obj-$(CONFIG_I2C_ATR) += i2c-atr.o
obj-y += algos/ busses/ muxes/
obj-$(CONFIG_I2C_STUB) += i2c-stub.o
obj-$(CONFIG_I2C_SLAVE_EEPROM) += i2c-slave-eeprom.o
diff --git a/drivers/i2c/i2c-atr.c b/drivers/i2c/i2c-atr.c
new file mode 100644
index 000000000000..0668c98886ad
--- /dev/null
+++ b/drivers/i2c/i2c-atr.c
@@ -0,0 +1,501 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * I2C Address Translator
+ *
+ * Copyright (c) 2019,2022 Luca Ceresoli <luca@lucaceresoli.net>
+ * Copyright (c) 2022,2023 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+ *
+ * Originally based on i2c-mux.c
+ */
+
+#include <linux/fwnode.h>
+#include <linux/i2c-atr.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+
+#define ATR_MAX_ADAPTERS 99 /* Just a sanity limit */
+#define ATR_MAX_SYMLINK_LEN 16 /* Longest name is 10 chars: "channel-99" */
+
+/**
+ * struct i2c_atr_cli2alias_pair - Holds the alias assigned to a client.
+ * @node: List node
+ * @client: Pointer to the client on the child bus
+ * @alias: I2C alias address assigned by the driver.
+ * This is the address that will be used to issue I2C transactions
+ * on the parent (physical) bus.
+ */
+struct i2c_atr_cli2alias_pair {
+ struct list_head node;
+ const struct i2c_client *client;
+ u16 alias;
+};
+
+/**
+ * struct i2c_atr_chan - Data for a channel.
+ * @adap: The &struct i2c_adapter for the channel
+ * @atr: The parent I2C ATR
+ * @chan_id: The ID of this channel
+ * @alias_list: List of @struct i2c_atr_cli2alias_pair containing the
+ * assigned aliases
+ * @orig_addrs_lock: Mutex protecting @orig_addrs
+ * @orig_addrs: Buffer used to store the original addresses during transmit
+ * @orig_addrs_size: Size of @orig_addrs
+ */
+struct i2c_atr_chan {
+ struct i2c_adapter adap;
+ struct i2c_atr *atr;
+ u32 chan_id;
+
+ struct list_head alias_list;
+
+ /* Lock orig_addrs during xfer */
+ struct mutex orig_addrs_lock;
+ u16 *orig_addrs;
+ unsigned int orig_addrs_size;
+};
+
+/**
+ * struct i2c_atr - The I2C ATR instance
+ * @parent: The parent &struct i2c_adapter
+ * @dev: The device that owns the I2C ATR instance
+ * @ops: &struct i2c_atr_ops
+ * @priv: Private driver data, set with i2c_atr_set_driver_data()
+ * @algo: The &struct i2c_algorithm for adapters
+ * @lock: Lock for the I2C bus segment (see &struct i2c_lock_operations)
+ * @max_adapters: Maximum number of adapters this I2C ATR can have
+ * @adapter: Array of adapters
+ */
+struct i2c_atr {
+ struct i2c_adapter *parent;
+ struct device *dev;
+ const struct i2c_atr_ops *ops;
+
+ void *priv;
+
+ struct i2c_algorithm algo;
+ /* lock for the I2C bus segment (see struct i2c_lock_operations) */
+ struct mutex lock;
+ int max_adapters;
+
+ struct i2c_adapter *adapter[];
+};
+
+static struct i2c_atr_cli2alias_pair *
+i2c_atr_find_mapping_by_client(const struct list_head *list,
+ const struct i2c_client *client)
+{
+ struct i2c_atr_cli2alias_pair *c2a;
+
+ list_for_each_entry(c2a, list, node) {
+ if (c2a->client == client)
+ return c2a;
+ }
+
+ return NULL;
+}
+
+static struct i2c_atr_cli2alias_pair *
+i2c_atr_find_mapping_by_addr(const struct list_head *list, u16 phys_addr)
+{
+ struct i2c_atr_cli2alias_pair *c2a;
+
+ list_for_each_entry(c2a, list, node) {
+ if (c2a->client->addr == phys_addr)
+ return c2a;
+ }
+
+ return NULL;
+}
+
+/*
+ * Replace all message addresses with their aliases, saving the original
+ * addresses.
+ *
+ * This function is internal for use in i2c_atr_master_xfer(). It must be
+ * followed by i2c_atr_unmap_msgs() to restore the original addresses.
+ */
+static int i2c_atr_map_msgs(struct i2c_atr_chan *chan, struct i2c_msg *msgs,
+ int num)
+{
+ struct i2c_atr *atr = chan->atr;
+ static struct i2c_atr_cli2alias_pair *c2a;
+ int i;
+
+ /* Ensure we have enough room to save the original addresses */
+ if (unlikely(chan->orig_addrs_size < num)) {
+ u16 *new_buf;
+
+ new_buf = kmalloc_array(num, sizeof(*new_buf), GFP_KERNEL);
+ if (!new_buf)
+ return -ENOMEM;
+
+ kfree(chan->orig_addrs);
+ chan->orig_addrs = new_buf;
+ chan->orig_addrs_size = num;
+ }
+
+ for (i = 0; i < num; i++) {
+ chan->orig_addrs[i] = msgs[i].addr;
+
+ c2a = i2c_atr_find_mapping_by_addr(&chan->alias_list,
+ msgs[i].addr);
+ if (!c2a) {
+ dev_err(atr->dev, "client 0x%02x not mapped!\n",
+ msgs[i].addr);
+ return -ENXIO;
+ }
+
+ msgs[i].addr = c2a->alias;
+ }
+
+ return 0;
+}
+
+/*
+ * Restore all message address aliases with the original addresses. This
+ * function is internal for use in i2c_atr_master_xfer().
+ *
+ * @see i2c_atr_map_msgs()
+ */
+static void i2c_atr_unmap_msgs(struct i2c_atr_chan *chan, struct i2c_msg *msgs,
+ int num)
+{
+ int i;
+
+ for (i = 0; i < num; i++)
+ msgs[i].addr = chan->orig_addrs[i];
+}
+
+static int i2c_atr_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
+ int num)
+{
+ struct i2c_atr_chan *chan = adap->algo_data;
+ struct i2c_atr *atr = chan->atr;
+ struct i2c_adapter *parent = atr->parent;
+ int ret;
+
+ /* Switch to the right atr port */
+ if (atr->ops->select) {
+ ret = atr->ops->select(atr, chan->chan_id);
+ if (ret < 0)
+ goto out_deselect;
+ }
+
+ /* Translate addresses */
+ mutex_lock(&chan->orig_addrs_lock);
+ ret = i2c_atr_map_msgs(chan, msgs, num);
+ if (ret < 0)
+ goto out_unlock_deselect;
+
+ /* Perform the transfer */
+ ret = i2c_transfer(parent, msgs, num);
+
+ /* Restore addresses */
+ i2c_atr_unmap_msgs(chan, msgs, num);
+
+out_unlock_deselect:
+ mutex_unlock(&chan->orig_addrs_lock);
+
+out_deselect:
+ if (atr->ops->deselect)
+ atr->ops->deselect(atr, chan->chan_id);
+
+ return ret;
+}
+
+static int i2c_atr_smbus_xfer(struct i2c_adapter *adap, u16 addr,
+ unsigned short flags, char read_write, u8 command,
+ int size, union i2c_smbus_data *data)
+{
+ struct i2c_atr_chan *chan = adap->algo_data;
+ struct i2c_atr *atr = chan->atr;
+ struct i2c_adapter *parent = atr->parent;
+ struct i2c_atr_cli2alias_pair *c2a;
+ int ret = 0;
+
+ c2a = i2c_atr_find_mapping_by_addr(&chan->alias_list, addr);
+ if (!c2a) {
+ dev_err(atr->dev, "client 0x%02x not mapped!\n", addr);
+ return -ENXIO;
+ }
+
+ if (atr->ops->select)
+ ret = atr->ops->select(atr, chan->chan_id);
+ if (!ret)
+ ret = i2c_smbus_xfer(parent, c2a->alias, flags, read_write,
+ command, size, data);
+ if (atr->ops->deselect)
+ atr->ops->deselect(atr, chan->chan_id);
+
+ return ret;
+}
+
+static u32 i2c_atr_functionality(struct i2c_adapter *adap)
+{
+ struct i2c_atr_chan *chan = adap->algo_data;
+ struct i2c_adapter *parent = chan->atr->parent;
+
+ return parent->algo->functionality(parent);
+}
+
+static void i2c_atr_lock_bus(struct i2c_adapter *adapter, unsigned int flags)
+{
+ struct i2c_atr_chan *chan = adapter->algo_data;
+ struct i2c_atr *atr = chan->atr;
+
+ mutex_lock(&atr->lock);
+}
+
+static int i2c_atr_trylock_bus(struct i2c_adapter *adapter, unsigned int flags)
+{
+ struct i2c_atr_chan *chan = adapter->algo_data;
+ struct i2c_atr *atr = chan->atr;
+
+ return mutex_trylock(&atr->lock);
+}
+
+static void i2c_atr_unlock_bus(struct i2c_adapter *adapter, unsigned int flags)
+{
+ struct i2c_atr_chan *chan = adapter->algo_data;
+ struct i2c_atr *atr = chan->atr;
+
+ mutex_unlock(&atr->lock);
+}
+
+static const struct i2c_lock_operations i2c_atr_lock_ops = {
+ .lock_bus = i2c_atr_lock_bus,
+ .trylock_bus = i2c_atr_trylock_bus,
+ .unlock_bus = i2c_atr_unlock_bus,
+};
+
+static int i2c_atr_attach_client(struct i2c_adapter *adapter,
+ const struct i2c_board_info *info,
+ const struct i2c_client *client)
+{
+ struct i2c_atr_chan *chan = adapter->algo_data;
+ struct i2c_atr *atr = chan->atr;
+ struct i2c_atr_cli2alias_pair *c2a;
+ u16 alias_id;
+ int ret;
+
+ c2a = kzalloc(sizeof(*c2a), GFP_KERNEL);
+ if (!c2a)
+ return -ENOMEM;
+
+ ret = atr->ops->attach_client(atr, chan->chan_id, info, client,
+ &alias_id);
+ if (ret)
+ goto err_free;
+
+ c2a->client = client;
+ c2a->alias = alias_id;
+ list_add(&c2a->node, &chan->alias_list);
+
+ return 0;
+
+err_free:
+ kfree(c2a);
+
+ return ret;
+}
+
+static void i2c_atr_detach_client(struct i2c_adapter *adapter,
+ const struct i2c_client *client)
+{
+ struct i2c_atr_chan *chan = adapter->algo_data;
+ struct i2c_atr *atr = chan->atr;
+ struct i2c_atr_cli2alias_pair *c2a;
+
+ atr->ops->detach_client(atr, chan->chan_id, client);
+
+ c2a = i2c_atr_find_mapping_by_client(&chan->alias_list, client);
+ if (c2a) {
+ list_del(&c2a->node);
+ kfree(c2a);
+ }
+}
+
+static const struct i2c_attach_operations i2c_atr_attach_ops = {
+ .attach_client = i2c_atr_attach_client,
+ .detach_client = i2c_atr_detach_client,
+};
+
+struct i2c_atr *i2c_atr_new(struct i2c_adapter *parent, struct device *dev,
+ const struct i2c_atr_ops *ops, int max_adapters)
+{
+ struct i2c_atr *atr;
+
+ if (max_adapters > ATR_MAX_ADAPTERS)
+ return ERR_PTR(-EINVAL);
+
+ if (!ops || !ops->attach_client || !ops->detach_client)
+ return ERR_PTR(-EINVAL);
+
+ atr = devm_kzalloc(dev, struct_size(atr, adapter, max_adapters),
+ GFP_KERNEL);
+ if (!atr)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&atr->lock);
+
+ atr->parent = parent;
+ atr->dev = dev;
+ atr->ops = ops;
+ atr->max_adapters = max_adapters;
+
+ if (parent->algo->master_xfer)
+ atr->algo.master_xfer = i2c_atr_master_xfer;
+ if (parent->algo->smbus_xfer)
+ atr->algo.smbus_xfer = i2c_atr_smbus_xfer;
+ atr->algo.functionality = i2c_atr_functionality;
+
+ return atr;
+}
+EXPORT_SYMBOL_NS_GPL(i2c_atr_new, I2C_ATR);
+
+void i2c_atr_delete(struct i2c_atr *atr)
+{
+ mutex_destroy(&atr->lock);
+}
+EXPORT_SYMBOL_NS_GPL(i2c_atr_delete, I2C_ATR);
+
+int i2c_atr_add_adapter(struct i2c_atr *atr, u32 chan_id,
+ struct fwnode_handle *bus_handle)
+{
+ struct i2c_adapter *parent = atr->parent;
+ struct device *dev = atr->dev;
+ struct i2c_atr_chan *chan;
+ char symlink_name[ATR_MAX_SYMLINK_LEN];
+ int ret;
+
+ if (chan_id >= atr->max_adapters) {
+ dev_err(dev, "No room for more i2c-atr adapters\n");
+ return -EINVAL;
+ }
+
+ if (atr->adapter[chan_id]) {
+ dev_err(dev, "Adapter %d already present\n", chan_id);
+ return -EEXIST;
+ }
+
+ chan = kzalloc(sizeof(*chan), GFP_KERNEL);
+ if (!chan)
+ return -ENOMEM;
+
+ chan->atr = atr;
+ chan->chan_id = chan_id;
+ INIT_LIST_HEAD(&chan->alias_list);
+ mutex_init(&chan->orig_addrs_lock);
+
+ snprintf(chan->adap.name, sizeof(chan->adap.name), "i2c-%d-atr-%d",
+ i2c_adapter_id(parent), chan_id);
+ chan->adap.owner = THIS_MODULE;
+ chan->adap.algo = &atr->algo;
+ chan->adap.algo_data = chan;
+ chan->adap.dev.parent = dev;
+ chan->adap.retries = parent->retries;
+ chan->adap.timeout = parent->timeout;
+ chan->adap.quirks = parent->quirks;
+ chan->adap.lock_ops = &i2c_atr_lock_ops;
+ chan->adap.attach_ops = &i2c_atr_attach_ops;
+
+ if (bus_handle) {
+ device_set_node(&chan->adap.dev, fwnode_handle_get(bus_handle));
+ } else {
+ struct fwnode_handle *atr_node;
+ struct fwnode_handle *child;
+ u32 reg;
+
+ atr_node = device_get_named_child_node(dev, "i2c-atr");
+
+ fwnode_for_each_child_node(atr_node, child) {
+ ret = fwnode_property_read_u32(child, "reg", ®);
+ if (ret)
+ continue;
+ if (chan_id == reg)
+ break;
+ }
+
+ device_set_node(&chan->adap.dev, child);
+ fwnode_handle_put(atr_node);
+ }
+
+ ret = i2c_add_adapter(&chan->adap);
+ if (ret) {
+ dev_err(dev, "failed to add atr-adapter %u (error=%d)\n",
+ chan_id, ret);
+ goto err_fwnode_put;
+ }
+
+ snprintf(symlink_name, sizeof(symlink_name), "channel-%u",
+ chan->chan_id);
+
+ ret = sysfs_create_link(&chan->adap.dev.kobj, &dev->kobj, "atr_device");
+ if (ret)
+ dev_warn(dev, "can't create symlink to atr device\n");
+ ret = sysfs_create_link(&dev->kobj, &chan->adap.dev.kobj, symlink_name);
+ if (ret)
+ dev_warn(dev, "can't create symlink for channel %u\n", chan_id);
+
+ dev_dbg(dev, "Added ATR child bus %d\n", i2c_adapter_id(&chan->adap));
+
+ atr->adapter[chan_id] = &chan->adap;
+
+ return 0;
+
+err_fwnode_put:
+ fwnode_handle_put(dev_fwnode(&chan->adap.dev));
+ mutex_destroy(&chan->orig_addrs_lock);
+ kfree(chan);
+ return ret;
+}
+EXPORT_SYMBOL_NS_GPL(i2c_atr_add_adapter, I2C_ATR);
+
+void i2c_atr_del_adapter(struct i2c_atr *atr, u32 chan_id)
+{
+ char symlink_name[ATR_MAX_SYMLINK_LEN];
+
+ struct i2c_adapter *adap = atr->adapter[chan_id];
+ struct i2c_atr_chan *chan = adap->algo_data;
+ struct fwnode_handle *fwnode = dev_fwnode(&adap->dev);
+ struct device *dev = atr->dev;
+
+ if (!adap)
+ return;
+
+ dev_dbg(dev, "Removing ATR child bus %d\n", i2c_adapter_id(adap));
+
+ atr->adapter[chan_id] = NULL;
+
+ snprintf(symlink_name, sizeof(symlink_name), "channel-%u",
+ chan->chan_id);
+ sysfs_remove_link(&dev->kobj, symlink_name);
+ sysfs_remove_link(&chan->adap.dev.kobj, "atr_device");
+
+ i2c_del_adapter(adap);
+ fwnode_handle_put(fwnode);
+ mutex_destroy(&chan->orig_addrs_lock);
+ kfree(chan->orig_addrs);
+ kfree(chan);
+}
+EXPORT_SYMBOL_NS_GPL(i2c_atr_del_adapter, I2C_ATR);
+
+void i2c_atr_set_driver_data(struct i2c_atr *atr, void *data)
+{
+ atr->priv = data;
+}
+EXPORT_SYMBOL_NS_GPL(i2c_atr_set_driver_data, I2C_ATR);
+
+void *i2c_atr_get_driver_data(struct i2c_atr *atr)
+{
+ return atr->priv;
+}
+EXPORT_SYMBOL_NS_GPL(i2c_atr_get_driver_data, I2C_ATR);
+
+MODULE_AUTHOR("Luca Ceresoli <luca.ceresoli@bootlin.com>");
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
+MODULE_DESCRIPTION("I2C Address Translator");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/i2c-atr.h b/include/linux/i2c-atr.h
new file mode 100644
index 000000000000..5b879115dfc6
--- /dev/null
+++ b/include/linux/i2c-atr.h
@@ -0,0 +1,118 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * I2C Address Translator
+ *
+ * Copyright (c) 2019,2022 Luca Ceresoli <luca@lucaceresoli.net>
+ * Copyright (c) 2022,2023 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+ *
+ * Based on i2c-mux.h
+ */
+
+#ifndef _LINUX_I2C_ATR_H
+#define _LINUX_I2C_ATR_H
+
+#include <linux/i2c.h>
+#include <linux/types.h>
+
+struct device;
+struct fwnode_handle;
+struct i2c_atr;
+
+/**
+ * struct i2c_atr_ops - Callbacks from ATR to the device driver.
+ * @select: Ask the driver to select a child bus (optional)
+ * @deselect: Ask the driver to deselect a child bus (optional)
+ * @attach_client: Notify the driver of a new device connected on a child
+ * bus. The driver must choose an I2C alias, configure the
+ * hardware to use it and return it in `alias_id`.
+ * @detach_client: Notify the driver of a device getting disconnected. The
+ * driver must configure the hardware to stop using the
+ * alias.
+ *
+ * All these functions return 0 on success, a negative error code otherwise.
+ */
+struct i2c_atr_ops {
+ int (*select)(struct i2c_atr *atr, u32 chan_id);
+ int (*deselect)(struct i2c_atr *atr, u32 chan_id);
+ int (*attach_client)(struct i2c_atr *atr, u32 chan_id,
+ const struct i2c_board_info *info,
+ const struct i2c_client *client, u16 *alias_id);
+ void (*detach_client)(struct i2c_atr *atr, u32 chan_id,
+ const struct i2c_client *client);
+};
+
+/**
+ * i2c_atr_new() - Allocate and initialize an I2C ATR helper.
+ * @parent: The parent (upstream) adapter
+ * @dev: The device acting as an ATR
+ * @ops: Driver-specific callbacks
+ * @max_adapters: Maximum number of child adapters
+ *
+ * The new ATR helper is connected to the parent adapter but has no child
+ * adapters. Call i2c_atr_add_adapter() to add some.
+ *
+ * Call i2c_atr_delete() to remove.
+ *
+ * Return: pointer to the new ATR helper object, or ERR_PTR
+ */
+struct i2c_atr *i2c_atr_new(struct i2c_adapter *parent, struct device *dev,
+ const struct i2c_atr_ops *ops, int max_adapters);
+
+/**
+ * i2c_atr_delete - Delete an I2C ATR helper.
+ * @atr: I2C ATR helper to be deleted.
+ *
+ * Precondition: all the adapters added with i2c_atr_add_adapter() mumst be
+ * removed by calling i2c_atr_del_adapter().
+ */
+void i2c_atr_delete(struct i2c_atr *atr);
+
+/**
+ * i2c_atr_add_adapter - Create a child ("downstream") I2C bus.
+ * @atr: The I2C ATR
+ * @chan_id: Index of the new adapter (0 .. max_adapters-1). This value is
+ * passed to the callbacks in `struct i2c_atr_ops`.
+ * @bus_handle: The fwnode handle that points to the adapter's i2c
+ * peripherals, or NULL.
+ *
+ * After calling this function a new i2c bus will appear. Adding and removing
+ * devices on the downstream bus will result in calls to the
+ * &i2c_atr_ops->attach_client and &i2c_atr_ops->detach_client callbacks for the
+ * driver to assign an alias to the device.
+ *
+ * The adapter's fwnode is set to @bus_handle, or if @bus_handle is NULL the
+ * function looks for a child node whose 'reg' property matches the chan_id
+ * under the i2c-atr device's 'i2c-atr' node.
+ *
+ * Call i2c_atr_del_adapter() to remove the adapter.
+ *
+ * Return: 0 on success, a negative error code otherwise.
+ */
+int i2c_atr_add_adapter(struct i2c_atr *atr, u32 chan_id,
+ struct fwnode_handle *bus_handle);
+
+/**
+ * i2c_atr_del_adapter - Remove a child ("downstream") I2C bus added by
+ * i2c_atr_add_adapter(). If no I2C bus has been added
+ * this function is a no-op.
+ * @atr: The I2C ATR
+ * @chan_id: Index of the adapter to be removed (0 .. max_adapters-1)
+ */
+void i2c_atr_del_adapter(struct i2c_atr *atr, u32 chan_id);
+
+/**
+ * i2c_atr_set_driver_data - Set private driver data to the i2c-atr instance.
+ * @atr: The I2C ATR
+ * @data: Pointer to the data to store
+ */
+void i2c_atr_set_driver_data(struct i2c_atr *atr, void *data);
+
+/**
+ * i2c_atr_get_driver_data - Get the stored drive data.
+ * @atr: The I2C ATR
+ *
+ * Return: Pointer to the stored data
+ */
+void *i2c_atr_get_driver_data(struct i2c_atr *atr);
+
+#endif /* _LINUX_I2C_ATR_H */
--
2.34.1
^ permalink raw reply related [flat|nested] 33+ messages in thread* [PATCH v6 3/8] dt-bindings: media: add TI DS90UB913 FPD-Link III Serializer
2023-01-05 14:02 [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
2023-01-05 14:03 ` [PATCH v6 1/8] i2c: core: let adapters be notified of client attach/detach Tomi Valkeinen
2023-01-05 14:03 ` [PATCH v6 2/8] i2c: add I2C Address Translator (ATR) support Tomi Valkeinen
@ 2023-01-05 14:03 ` Tomi Valkeinen
2023-01-08 3:15 ` Laurent Pinchart
2023-01-08 22:01 ` Rob Herring
2023-01-05 14:03 ` [PATCH v6 4/8] dt-bindings: media: add TI DS90UB953 " Tomi Valkeinen
` (5 subsequent siblings)
8 siblings, 2 replies; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-05 14:03 UTC (permalink / raw)
To: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen
Cc: Mauro Carvalho Chehab, Peter Rosin, Liam Girdwood, Mark Brown,
Sakari Ailus, Laurent Pinchart, Michael Tretter, Shawn Tu,
Hans Verkuil, Mike Pagano, Krzysztof Hałasa, Marek Vasut,
Tomi Valkeinen
Add DT bindings for TI DS90UB913 FPD-Link III Serializer.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
.../bindings/media/i2c/ti,ds90ub913.yaml | 133 ++++++++++++++++++
1 file changed, 133 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
new file mode 100644
index 000000000000..f6612bb0f667
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
@@ -0,0 +1,133 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub913.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments DS90UB913 FPD-Link III Serializer
+
+maintainers:
+ - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+
+description:
+ The TI DS90UB913 is an FPD-Link III video serializer for parallel video.
+
+properties:
+ compatible:
+ enum:
+ - ti,ds90ub913a-q1
+
+ '#gpio-cells':
+ const: 2
+ description:
+ First cell is the GPO pin number, second cell is the flags. The GPO pin
+ number must be in range of [0, 3]. Note that GPOs 2 and 3 are not
+ available in external oscillator mode.
+
+ gpio-controller: true
+
+ clocks:
+ maxItems: 1
+ description:
+ Reference clock connected to the CLKIN pin.
+
+ clock-names:
+ items:
+ - const: clkin
+
+ '#clock-cells':
+ const: 0
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ properties:
+ port@0:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: Parallel input port
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+
+ required:
+ - pclk-sample
+
+ port@1:
+ $ref: /schemas/graph.yaml#/properties/port
+ unevaluatedProperties: false
+ description: FPD-Link III output port
+
+ required:
+ - port@0
+ - port@1
+
+ i2c:
+ $ref: /schemas/i2c/i2c-controller.yaml#
+ unevaluatedProperties: false
+
+required:
+ - compatible
+ - '#gpio-cells'
+ - gpio-controller
+ - '#clock-cells'
+ - ports
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ serializer {
+ compatible = "ti,ds90ub913a-q1";
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ clocks = <&clk_cam_48M>;
+ clock-names = "clkin";
+
+ #clock-cells = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ ub913_in: endpoint {
+ remote-endpoint = <&sensor_out>;
+ pclk-sample = <1>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ endpoint {
+ remote-endpoint = <&deser_fpd_in>;
+ };
+ };
+ };
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ sensor@48 {
+ compatible = "aptina,mt9v111";
+ reg = <0x48>;
+
+ clocks = <&fixed_clock>;
+
+ port {
+ sensor_out: endpoint {
+ remote-endpoint = <&ub913_in>;
+ };
+ };
+ };
+ };
+ };
+...
--
2.34.1
^ permalink raw reply related [flat|nested] 33+ messages in thread* Re: [PATCH v6 3/8] dt-bindings: media: add TI DS90UB913 FPD-Link III Serializer
2023-01-05 14:03 ` [PATCH v6 3/8] dt-bindings: media: add TI DS90UB913 FPD-Link III Serializer Tomi Valkeinen
@ 2023-01-08 3:15 ` Laurent Pinchart
2023-01-08 22:01 ` Rob Herring
1 sibling, 0 replies; 33+ messages in thread
From: Laurent Pinchart @ 2023-01-08 3:15 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
Hi Tomi,
Thank you for the patch.
On Thu, Jan 05, 2023 at 04:03:02PM +0200, Tomi Valkeinen wrote:
> Add DT bindings for TI DS90UB913 FPD-Link III Serializer.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> .../bindings/media/i2c/ti,ds90ub913.yaml | 133 ++++++++++++++++++
> 1 file changed, 133 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
> new file mode 100644
> index 000000000000..f6612bb0f667
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
> @@ -0,0 +1,133 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub913.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments DS90UB913 FPD-Link III Serializer
> +
> +maintainers:
> + - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> +
> +description:
> + The TI DS90UB913 is an FPD-Link III video serializer for parallel video.
> +
> +properties:
> + compatible:
> + enum:
> + - ti,ds90ub913a-q1
> +
> + '#gpio-cells':
> + const: 2
> + description:
> + First cell is the GPO pin number, second cell is the flags. The GPO pin
> + number must be in range of [0, 3]. Note that GPOs 2 and 3 are not
> + available in external oscillator mode.
> +
> + gpio-controller: true
> +
> + clocks:
> + maxItems: 1
> + description:
> + Reference clock connected to the CLKIN pin.
> +
> + clock-names:
> + items:
> + - const: clkin
> +
> + '#clock-cells':
> + const: 0
> +
> + ports:
> + $ref: /schemas/graph.yaml#/properties/ports
> +
> + properties:
> + port@0:
> + $ref: /schemas/graph.yaml#/$defs/port-base
> + unevaluatedProperties: false
> + description: Parallel input port
> +
> + properties:
> + endpoint:
> + $ref: /schemas/media/video-interfaces.yaml#
> + unevaluatedProperties: false
> +
> + required:
> + - pclk-sample
> +
> + port@1:
> + $ref: /schemas/graph.yaml#/properties/port
> + unevaluatedProperties: false
> + description: FPD-Link III output port
> +
> + required:
> + - port@0
> + - port@1
> +
> + i2c:
> + $ref: /schemas/i2c/i2c-controller.yaml#
> + unevaluatedProperties: false
> +
> +required:
> + - compatible
> + - '#gpio-cells'
> + - gpio-controller
> + - '#clock-cells'
> + - ports
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> + serializer {
> + compatible = "ti,ds90ub913a-q1";
> +
> + gpio-controller;
> + #gpio-cells = <2>;
> +
> + clocks = <&clk_cam_48M>;
> + clock-names = "clkin";
> +
> + #clock-cells = <0>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + ub913_in: endpoint {
> + remote-endpoint = <&sensor_out>;
> + pclk-sample = <1>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> + endpoint {
> + remote-endpoint = <&deser_fpd_in>;
> + };
> + };
> + };
> +
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + sensor@48 {
> + compatible = "aptina,mt9v111";
> + reg = <0x48>;
> +
> + clocks = <&fixed_clock>;
> +
> + port {
> + sensor_out: endpoint {
> + remote-endpoint = <&ub913_in>;
> + };
> + };
> + };
> + };
> + };
> +...
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 3/8] dt-bindings: media: add TI DS90UB913 FPD-Link III Serializer
2023-01-05 14:03 ` [PATCH v6 3/8] dt-bindings: media: add TI DS90UB913 FPD-Link III Serializer Tomi Valkeinen
2023-01-08 3:15 ` Laurent Pinchart
@ 2023-01-08 22:01 ` Rob Herring
1 sibling, 0 replies; 33+ messages in thread
From: Rob Herring @ 2023-01-08 22:01 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: Liam Girdwood, Krzysztof Hałasa, devicetree,
Krzysztof Kozlowski, Wolfram Sang, linux-i2c, Andy Shevchenko,
Rob Herring, Laurent Pinchart, Marek Vasut, Luca Ceresoli,
Michael Tretter, Mark Brown, Hans Verkuil, linux-kernel,
Peter Rosin, linux-media, Matti Vaittinen, Sakari Ailus,
Mauro Carvalho Chehab, Shawn Tu, Mike Pagano
On Thu, 05 Jan 2023 16:03:02 +0200, Tomi Valkeinen wrote:
> Add DT bindings for TI DS90UB913 FPD-Link III Serializer.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> ---
> .../bindings/media/i2c/ti,ds90ub913.yaml | 133 ++++++++++++++++++
> 1 file changed, 133 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
>
Reviewed-by: Rob Herring <robh@kernel.org>
^ permalink raw reply [flat|nested] 33+ messages in thread
* [PATCH v6 4/8] dt-bindings: media: add TI DS90UB953 FPD-Link III Serializer
2023-01-05 14:02 [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
` (2 preceding siblings ...)
2023-01-05 14:03 ` [PATCH v6 3/8] dt-bindings: media: add TI DS90UB913 FPD-Link III Serializer Tomi Valkeinen
@ 2023-01-05 14:03 ` Tomi Valkeinen
2023-01-08 3:17 ` Laurent Pinchart
2023-01-08 22:04 ` Rob Herring
2023-01-05 14:03 ` [PATCH v6 5/8] dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer Tomi Valkeinen
` (4 subsequent siblings)
8 siblings, 2 replies; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-05 14:03 UTC (permalink / raw)
To: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen
Cc: Mauro Carvalho Chehab, Peter Rosin, Liam Girdwood, Mark Brown,
Sakari Ailus, Laurent Pinchart, Michael Tretter, Shawn Tu,
Hans Verkuil, Mike Pagano, Krzysztof Hałasa, Marek Vasut,
Tomi Valkeinen
Add DT bindings for TI DS90UB953 FPD-Link III Serializer.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
.../bindings/media/i2c/ti,ds90ub953.yaml | 134 ++++++++++++++++++
1 file changed, 134 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
new file mode 100644
index 000000000000..2030366994d1
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
@@ -0,0 +1,134 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub953.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments DS90UB953 FPD-Link III Serializer
+
+maintainers:
+ - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+
+description:
+ The TI DS90UB953 is an FPD-Link III video serializer for MIPI CSI-2.
+
+properties:
+ compatible:
+ enum:
+ - ti,ds90ub953-q1
+ - ti,ds90ub971-q1
+
+ '#gpio-cells':
+ const: 2
+ description:
+ First cell is the GPIO pin number, second cell is the flags. The GPIO pin
+ number must be in range of [0, 3].
+
+ gpio-controller: true
+
+ clocks:
+ maxItems: 1
+ description:
+ Reference clock connected to the CLKIN pin.
+
+ clock-names:
+ items:
+ - const: clkin
+
+ '#clock-cells':
+ const: 0
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ properties:
+ port@0:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: CSI-2 input port
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+
+ required:
+ - data-lanes
+
+ port@1:
+ $ref: /schemas/graph.yaml#/properties/port
+ unevaluatedProperties: false
+ description: FPD-Link III output port
+
+ required:
+ - port@0
+ - port@1
+
+ i2c:
+ $ref: /schemas/i2c/i2c-controller.yaml#
+ unevaluatedProperties: false
+
+required:
+ - compatible
+ - '#gpio-cells'
+ - gpio-controller
+ - '#clock-cells'
+ - ports
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ serializer {
+ compatible = "ti,ds90ub953-q1";
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ #clock-cells = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ ub953_in: endpoint {
+ clock-lanes = <0>;
+ data-lanes = <1 2 3 4>;
+ remote-endpoint = <&sensor_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ endpoint {
+ remote-endpoint = <&deser_fpd_in>;
+ };
+ };
+ };
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ sensor@1a {
+ compatible = "sony,imx274";
+ reg = <0x1a>;
+
+ reset-gpios = <&serializer 0 GPIO_ACTIVE_LOW>;
+
+ clocks = <&serializer>;
+ clock-names = "inck";
+
+ port {
+ sensor_out: endpoint {
+ remote-endpoint = <&ub953_in>;
+ };
+ };
+ };
+ };
+ };
+...
--
2.34.1
^ permalink raw reply related [flat|nested] 33+ messages in thread* Re: [PATCH v6 4/8] dt-bindings: media: add TI DS90UB953 FPD-Link III Serializer
2023-01-05 14:03 ` [PATCH v6 4/8] dt-bindings: media: add TI DS90UB953 " Tomi Valkeinen
@ 2023-01-08 3:17 ` Laurent Pinchart
2023-01-08 22:04 ` Rob Herring
1 sibling, 0 replies; 33+ messages in thread
From: Laurent Pinchart @ 2023-01-08 3:17 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
Hi Tomi,
Thank you for the patch.
On Thu, Jan 05, 2023 at 04:03:03PM +0200, Tomi Valkeinen wrote:
> Add DT bindings for TI DS90UB953 FPD-Link III Serializer.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> .../bindings/media/i2c/ti,ds90ub953.yaml | 134 ++++++++++++++++++
> 1 file changed, 134 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
> new file mode 100644
> index 000000000000..2030366994d1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
> @@ -0,0 +1,134 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub953.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments DS90UB953 FPD-Link III Serializer
> +
> +maintainers:
> + - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> +
> +description:
> + The TI DS90UB953 is an FPD-Link III video serializer for MIPI CSI-2.
> +
> +properties:
> + compatible:
> + enum:
> + - ti,ds90ub953-q1
> + - ti,ds90ub971-q1
> +
> + '#gpio-cells':
> + const: 2
> + description:
> + First cell is the GPIO pin number, second cell is the flags. The GPIO pin
> + number must be in range of [0, 3].
> +
> + gpio-controller: true
> +
> + clocks:
> + maxItems: 1
> + description:
> + Reference clock connected to the CLKIN pin.
> +
> + clock-names:
> + items:
> + - const: clkin
> +
> + '#clock-cells':
> + const: 0
> +
> + ports:
> + $ref: /schemas/graph.yaml#/properties/ports
> +
> + properties:
> + port@0:
> + $ref: /schemas/graph.yaml#/$defs/port-base
> + unevaluatedProperties: false
> + description: CSI-2 input port
> +
> + properties:
> + endpoint:
> + $ref: /schemas/media/video-interfaces.yaml#
> + unevaluatedProperties: false
> +
> + required:
> + - data-lanes
> +
> + port@1:
> + $ref: /schemas/graph.yaml#/properties/port
> + unevaluatedProperties: false
> + description: FPD-Link III output port
> +
> + required:
> + - port@0
> + - port@1
> +
> + i2c:
> + $ref: /schemas/i2c/i2c-controller.yaml#
> + unevaluatedProperties: false
> +
> +required:
> + - compatible
> + - '#gpio-cells'
> + - gpio-controller
> + - '#clock-cells'
> + - ports
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> + serializer {
> + compatible = "ti,ds90ub953-q1";
> +
> + gpio-controller;
> + #gpio-cells = <2>;
> +
> + #clock-cells = <0>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + ub953_in: endpoint {
> + clock-lanes = <0>;
> + data-lanes = <1 2 3 4>;
> + remote-endpoint = <&sensor_out>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> + endpoint {
> + remote-endpoint = <&deser_fpd_in>;
> + };
> + };
> + };
> +
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + sensor@1a {
> + compatible = "sony,imx274";
> + reg = <0x1a>;
> +
> + reset-gpios = <&serializer 0 GPIO_ACTIVE_LOW>;
> +
> + clocks = <&serializer>;
> + clock-names = "inck";
> +
> + port {
> + sensor_out: endpoint {
> + remote-endpoint = <&ub953_in>;
> + };
> + };
> + };
> + };
> + };
> +...
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 4/8] dt-bindings: media: add TI DS90UB953 FPD-Link III Serializer
2023-01-05 14:03 ` [PATCH v6 4/8] dt-bindings: media: add TI DS90UB953 " Tomi Valkeinen
2023-01-08 3:17 ` Laurent Pinchart
@ 2023-01-08 22:04 ` Rob Herring
1 sibling, 0 replies; 33+ messages in thread
From: Rob Herring @ 2023-01-08 22:04 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: Krzysztof Hałasa, linux-kernel, linux-media, Wolfram Sang,
Laurent Pinchart, Andy Shevchenko, Mauro Carvalho Chehab,
Liam Girdwood, Shawn Tu, Marek Vasut, linux-i2c, devicetree,
Sakari Ailus, Krzysztof Kozlowski, Matti Vaittinen, Mike Pagano,
Luca Ceresoli, Peter Rosin, Hans Verkuil, Rob Herring,
Mark Brown, Michael Tretter
On Thu, 05 Jan 2023 16:03:03 +0200, Tomi Valkeinen wrote:
> Add DT bindings for TI DS90UB953 FPD-Link III Serializer.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> ---
> .../bindings/media/i2c/ti,ds90ub953.yaml | 134 ++++++++++++++++++
> 1 file changed, 134 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
>
Reviewed-by: Rob Herring <robh@kernel.org>
^ permalink raw reply [flat|nested] 33+ messages in thread
* [PATCH v6 5/8] dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer
2023-01-05 14:02 [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
` (3 preceding siblings ...)
2023-01-05 14:03 ` [PATCH v6 4/8] dt-bindings: media: add TI DS90UB953 " Tomi Valkeinen
@ 2023-01-05 14:03 ` Tomi Valkeinen
2023-01-08 3:23 ` Laurent Pinchart
2023-01-05 14:03 ` [PATCH v6 6/8] media: i2c: add DS90UB960 driver Tomi Valkeinen
` (3 subsequent siblings)
8 siblings, 1 reply; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-05 14:03 UTC (permalink / raw)
To: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen
Cc: Mauro Carvalho Chehab, Peter Rosin, Liam Girdwood, Mark Brown,
Sakari Ailus, Laurent Pinchart, Michael Tretter, Shawn Tu,
Hans Verkuil, Mike Pagano, Krzysztof Hałasa, Marek Vasut,
Tomi Valkeinen, Rob Herring
Add DT bindings for TI DS90UB960 FPD-Link III Deserializer.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
.../bindings/media/i2c/ti,ds90ub960.yaml | 402 ++++++++++++++++++
1 file changed, 402 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
new file mode 100644
index 000000000000..664799ae55be
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
@@ -0,0 +1,402 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub960.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments DS90UB9XX Family FPD-Link Deserializer Hubs
+
+maintainers:
+ - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+
+description:
+ The TI DS90UB9XX devices are FPD-Link video deserializers with I2C and GPIO
+ forwarding.
+
+properties:
+ compatible:
+ enum:
+ - ti,ds90ub960-q1
+ - ti,ds90ub9702-q1
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+ description:
+ Reference clock connected to the REFCLK pin.
+
+ clock-names:
+ items:
+ - const: refclk
+
+ powerdown-gpios:
+ maxItems: 1
+ description:
+ Specifier for the GPIO connected to the PDB pin.
+
+ i2c-alias-pool:
+ $ref: /schemas/types.yaml#/definitions/uint16-array
+ description:
+ I2C alias pool is a pool of I2C addresses on the main I2C bus that can be
+ used to access the remote peripherals on the serializer's I2C bus. The
+ addresses must be available, not used by any other peripheral. Each
+ remote peripheral is assigned an alias from the pool, and transactions to
+ that address will be forwarded to the remote peripheral, with the address
+ translated to the remote peripheral's real address. This property is not
+ needed if there are no I2C addressable remote peripherals.
+
+ links:
+ type: object
+ additionalProperties: false
+
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ ti,manual-strobe:
+ type: boolean
+ description:
+ Enable manual strobe position and EQ level
+
+ patternProperties:
+ '^link@[0-3]$':
+ type: object
+ additionalProperties: false
+ properties:
+ reg:
+ description: The link number
+ maxItems: 1
+
+ i2c-alias:
+ description:
+ The I2C address used for the serializer. Transactions to this
+ address on the I2C bus where the deserializer resides are
+ forwarded to the serializer.
+
+ ti,rx-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum:
+ - 0 # RAW10
+ - 1 # RAW12 HF
+ - 2 # RAW12 LF
+ - 3 # CSI2 SYNC
+ - 4 # CSI2 NON-SYNC
+ description:
+ FPD-Link Input Mode. This should reflect the hardware and the
+ default mode of the connected camera module.
+
+ ti,cdr-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum:
+ - 0 # FPD-Link III
+ - 1 # FPD-Link IV
+ description:
+ FPD-Link CDR Mode. This should reflect the hardware and the
+ default mode of the connected camera module.
+
+ ti,strobe-pos:
+ $ref: /schemas/types.yaml#/definitions/int32
+ minimum: -13
+ maximum: 13
+ description: Manual strobe position
+
+ ti,eq-level:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 14
+ description: Manual EQ level
+
+ serializer:
+ type: object
+ description: FPD-Link Serializer node
+
+ required:
+ - reg
+ - i2c-alias
+ - ti,rx-mode
+ - serializer
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ properties:
+ port@0:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: FPD-Link input 0
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+ description:
+ Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+ hsync-active and vsync-active must be defined.
+
+ port@1:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: FPD-Link input 1
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+ description:
+ Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+ hsync-active and vsync-active must be defined.
+
+ port@2:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: FPD-Link input 2
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+ description:
+ Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+ hsync-active and vsync-active must be defined.
+
+ port@3:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: FPD-Link input 3
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+ description:
+ Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+ hsync-active and vsync-active must be defined.
+
+ port@4:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: CSI-2 Output 0
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ data-lanes:
+ minItems: 1
+ maxItems: 4
+
+ required:
+ - data-lanes
+
+ port@5:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: CSI-2 Output 1
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ data-lanes:
+ minItems: 1
+ maxItems: 4
+
+ required:
+ - data-lanes
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - ports
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ i2c {
+ clock-frequency = <400000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ deser@3d {
+ compatible = "ti,ds90ub960-q1";
+ reg = <0x3d>;
+
+ clock-names = "refclk";
+ clocks = <&fixed_clock>;
+
+ powerdown-gpios = <&pca9555 7 GPIO_ACTIVE_LOW>;
+
+ i2c-alias-pool = /bits/ 16 <0x4a 0x4b 0x4c 0x4d 0x4e 0x4f>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ /* Port 0, Camera 0 */
+ port@0 {
+ reg = <0>;
+
+ ub960_fpd3_1_in: endpoint {
+ remote-endpoint = <&ub953_1_out>;
+ };
+ };
+
+ /* Port 1, Camera 1 */
+ port@1 {
+ reg = <1>;
+
+ ub960_fpd3_2_in: endpoint {
+ remote-endpoint = <&ub913_2_out>;
+ hsync-active = <0>;
+ vsync-active = <1>;
+ };
+ };
+
+ /* Port 4, CSI-2 TX */
+ port@4 {
+ reg = <4>;
+ ds90ub960_0_csi_out: endpoint {
+ data-lanes = <1 2 3 4>;
+ link-frequencies = /bits/ 64 <800000000>;
+ remote-endpoint = <&csi2_phy0>;
+ };
+ };
+ };
+
+ links {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ /* Link 0 has DS90UB953 serializer and IMX274 sensor */
+
+ link@0 {
+ reg = <0>;
+ i2c-alias = <0x44>;
+
+ ti,rx-mode = <3>;
+
+ serializer1: serializer {
+ compatible = "ti,ds90ub953-q1";
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ #clock-cells = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ ub953_1_in: endpoint {
+ data-lanes = <1 2 3 4>;
+ remote-endpoint = <&sensor_1_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ ub953_1_out: endpoint {
+ remote-endpoint = <&ub960_fpd3_1_in>;
+ };
+ };
+ };
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ sensor@1a {
+ compatible = "sony,imx274";
+ reg = <0x1a>;
+
+ reset-gpios = <&serializer1 0 GPIO_ACTIVE_LOW>;
+
+ port {
+ sensor_1_out: endpoint {
+ remote-endpoint = <&ub953_1_in>;
+ };
+ };
+ };
+ };
+ };
+ }; /* End of link@0 */
+
+ /* Link 1 has DS90UB913 serializer and MT9V111 sensor */
+
+ link@1 {
+ reg = <1>;
+ i2c-alias = <0x45>;
+
+ ti,rx-mode = <0>;
+
+ serializer2: serializer {
+ compatible = "ti,ds90ub913a-q1";
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ clocks = <&clk_cam_48M>;
+ clock-names = "clkin";
+
+ #clock-cells = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ ub913_2_in: endpoint {
+ remote-endpoint = <&sensor_2_out>;
+ pclk-sample = <1>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ ub913_2_out: endpoint {
+ remote-endpoint = <&ub960_fpd3_2_in>;
+ };
+ };
+ };
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ sensor@48 {
+ compatible = "aptina,mt9v111";
+ reg = <0x48>;
+
+ clocks = <&serializer2>;
+
+ port {
+ sensor_2_out: endpoint {
+ remote-endpoint = <&ub913_2_in>;
+ };
+ };
+ };
+ };
+ };
+ }; /* End of link@1 */
+ };
+ };
+ };
+...
--
2.34.1
^ permalink raw reply related [flat|nested] 33+ messages in thread* Re: [PATCH v6 5/8] dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer
2023-01-05 14:03 ` [PATCH v6 5/8] dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer Tomi Valkeinen
@ 2023-01-08 3:23 ` Laurent Pinchart
2023-01-09 8:30 ` Tomi Valkeinen
0 siblings, 1 reply; 33+ messages in thread
From: Laurent Pinchart @ 2023-01-08 3:23 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut, Rob Herring
Hi Tomi,
Thank you for the patch.
On Thu, Jan 05, 2023 at 04:03:04PM +0200, Tomi Valkeinen wrote:
> Add DT bindings for TI DS90UB960 FPD-Link III Deserializer.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
> .../bindings/media/i2c/ti,ds90ub960.yaml | 402 ++++++++++++++++++
> 1 file changed, 402 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> new file mode 100644
> index 000000000000..664799ae55be
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> @@ -0,0 +1,402 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub960.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments DS90UB9XX Family FPD-Link Deserializer Hubs
> +
> +maintainers:
> + - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> +
> +description:
> + The TI DS90UB9XX devices are FPD-Link video deserializers with I2C and GPIO
> + forwarding.
> +
> +properties:
> + compatible:
> + enum:
> + - ti,ds90ub960-q1
> + - ti,ds90ub9702-q1
> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> + description:
> + Reference clock connected to the REFCLK pin.
> +
> + clock-names:
> + items:
> + - const: refclk
> +
> + powerdown-gpios:
> + maxItems: 1
> + description:
> + Specifier for the GPIO connected to the PDB pin.
> +
> + i2c-alias-pool:
> + $ref: /schemas/types.yaml#/definitions/uint16-array
> + description:
> + I2C alias pool is a pool of I2C addresses on the main I2C bus that can be
> + used to access the remote peripherals on the serializer's I2C bus. The
> + addresses must be available, not used by any other peripheral. Each
> + remote peripheral is assigned an alias from the pool, and transactions to
> + that address will be forwarded to the remote peripheral, with the address
> + translated to the remote peripheral's real address. This property is not
> + needed if there are no I2C addressable remote peripherals.
> +
> + links:
> + type: object
> + additionalProperties: false
> +
> + properties:
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + ti,manual-strobe:
> + type: boolean
> + description:
> + Enable manual strobe position and EQ level
> +
> + patternProperties:
> + '^link@[0-3]$':
> + type: object
> + additionalProperties: false
> + properties:
> + reg:
> + description: The link number
> + maxItems: 1
> +
> + i2c-alias:
> + description:
> + The I2C address used for the serializer. Transactions to this
> + address on the I2C bus where the deserializer resides are
> + forwarded to the serializer.
> +
> + ti,rx-mode:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + enum:
> + - 0 # RAW10
> + - 1 # RAW12 HF
> + - 2 # RAW12 LF
> + - 3 # CSI2 SYNC
> + - 4 # CSI2 NON-SYNC
> + description:
> + FPD-Link Input Mode. This should reflect the hardware and the
> + default mode of the connected camera module.
As the remote device may not be a camera, I'd write "of the connected
device" or "of the connected serializer".
> +
> + ti,cdr-mode:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + enum:
> + - 0 # FPD-Link III
> + - 1 # FPD-Link IV
> + description:
> + FPD-Link CDR Mode. This should reflect the hardware and the
> + default mode of the connected camera module.
> +
> + ti,strobe-pos:
> + $ref: /schemas/types.yaml#/definitions/int32
> + minimum: -13
> + maximum: 13
> + description: Manual strobe position
> +
> + ti,eq-level:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + maximum: 14
> + description: Manual EQ level
> +
> + serializer:
> + type: object
> + description: FPD-Link Serializer node
> +
> + required:
> + - reg
> + - i2c-alias
> + - ti,rx-mode
> + - serializer
> +
> + ports:
> + $ref: /schemas/graph.yaml#/properties/ports
> +
> + properties:
> + port@0:
> + $ref: /schemas/graph.yaml#/$defs/port-base
> + unevaluatedProperties: false
> + description: FPD-Link input 0
> +
> + properties:
> + endpoint:
> + $ref: /schemas/media/video-interfaces.yaml#
> + unevaluatedProperties: false
> + description:
> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> + hsync-active and vsync-active must be defined.
> +
> + port@1:
> + $ref: /schemas/graph.yaml#/$defs/port-base
> + unevaluatedProperties: false
> + description: FPD-Link input 1
> +
> + properties:
> + endpoint:
> + $ref: /schemas/media/video-interfaces.yaml#
> + unevaluatedProperties: false
> + description:
> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> + hsync-active and vsync-active must be defined.
> +
> + port@2:
> + $ref: /schemas/graph.yaml#/$defs/port-base
> + unevaluatedProperties: false
> + description: FPD-Link input 2
> +
> + properties:
> + endpoint:
> + $ref: /schemas/media/video-interfaces.yaml#
> + unevaluatedProperties: false
> + description:
> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> + hsync-active and vsync-active must be defined.
> +
> + port@3:
> + $ref: /schemas/graph.yaml#/$defs/port-base
> + unevaluatedProperties: false
> + description: FPD-Link input 3
> +
> + properties:
> + endpoint:
> + $ref: /schemas/media/video-interfaces.yaml#
> + unevaluatedProperties: false
> + description:
> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> + hsync-active and vsync-active must be defined.
> +
> + port@4:
> + $ref: /schemas/graph.yaml#/$defs/port-base
> + unevaluatedProperties: false
> + description: CSI-2 Output 0
> +
> + properties:
> + endpoint:
> + $ref: /schemas/media/video-interfaces.yaml#
> + unevaluatedProperties: false
> +
> + properties:
> + data-lanes:
> + minItems: 1
> + maxItems: 4
> +
> + required:
> + - data-lanes
> +
> + port@5:
> + $ref: /schemas/graph.yaml#/$defs/port-base
> + unevaluatedProperties: false
> + description: CSI-2 Output 1
> +
> + properties:
> + endpoint:
> + $ref: /schemas/media/video-interfaces.yaml#
> + unevaluatedProperties: false
> +
> + properties:
> + data-lanes:
> + minItems: 1
> + maxItems: 4
> +
> + required:
> + - data-lanes
I think you need
required:
- port@0
- port@1
- port@2
- port@3
- port@4
- port@5
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - clock-names
> + - ports
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> + i2c {
> + clock-frequency = <400000>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + deser@3d {
> + compatible = "ti,ds90ub960-q1";
> + reg = <0x3d>;
> +
> + clock-names = "refclk";
> + clocks = <&fixed_clock>;
> +
> + powerdown-gpios = <&pca9555 7 GPIO_ACTIVE_LOW>;
> +
> + i2c-alias-pool = /bits/ 16 <0x4a 0x4b 0x4c 0x4d 0x4e 0x4f>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + /* Port 0, Camera 0 */
> + port@0 {
> + reg = <0>;
> +
> + ub960_fpd3_1_in: endpoint {
> + remote-endpoint = <&ub953_1_out>;
> + };
> + };
> +
> + /* Port 1, Camera 1 */
> + port@1 {
> + reg = <1>;
> +
> + ub960_fpd3_2_in: endpoint {
> + remote-endpoint = <&ub913_2_out>;
> + hsync-active = <0>;
> + vsync-active = <1>;
> + };
> + };
> +
> + /* Port 4, CSI-2 TX */
> + port@4 {
> + reg = <4>;
> + ds90ub960_0_csi_out: endpoint {
> + data-lanes = <1 2 3 4>;
> + link-frequencies = /bits/ 64 <800000000>;
> + remote-endpoint = <&csi2_phy0>;
> + };
> + };
> + };
> +
> + links {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + /* Link 0 has DS90UB953 serializer and IMX274 sensor */
> +
> + link@0 {
> + reg = <0>;
> + i2c-alias = <0x44>;
> +
> + ti,rx-mode = <3>;
> +
> + serializer1: serializer {
> + compatible = "ti,ds90ub953-q1";
> +
> + gpio-controller;
> + #gpio-cells = <2>;
> +
> + #clock-cells = <0>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + ub953_1_in: endpoint {
> + data-lanes = <1 2 3 4>;
> + remote-endpoint = <&sensor_1_out>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> +
> + ub953_1_out: endpoint {
> + remote-endpoint = <&ub960_fpd3_1_in>;
> + };
> + };
> + };
> +
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + sensor@1a {
> + compatible = "sony,imx274";
> + reg = <0x1a>;
> +
> + reset-gpios = <&serializer1 0 GPIO_ACTIVE_LOW>;
> +
> + port {
> + sensor_1_out: endpoint {
> + remote-endpoint = <&ub953_1_in>;
> + };
> + };
> + };
> + };
> + };
> + }; /* End of link@0 */
> +
> + /* Link 1 has DS90UB913 serializer and MT9V111 sensor */
> +
> + link@1 {
> + reg = <1>;
> + i2c-alias = <0x45>;
> +
> + ti,rx-mode = <0>;
> +
> + serializer2: serializer {
> + compatible = "ti,ds90ub913a-q1";
> +
> + gpio-controller;
> + #gpio-cells = <2>;
> +
> + clocks = <&clk_cam_48M>;
> + clock-names = "clkin";
> +
> + #clock-cells = <0>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + ub913_2_in: endpoint {
> + remote-endpoint = <&sensor_2_out>;
> + pclk-sample = <1>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> +
> + ub913_2_out: endpoint {
> + remote-endpoint = <&ub960_fpd3_2_in>;
> + };
> + };
> + };
> +
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + sensor@48 {
> + compatible = "aptina,mt9v111";
> + reg = <0x48>;
> +
> + clocks = <&serializer2>;
> +
> + port {
> + sensor_2_out: endpoint {
> + remote-endpoint = <&ub913_2_in>;
> + };
> + };
> + };
> + };
> + };
> + }; /* End of link@1 */
> + };
> + };
> + };
> +...
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 5/8] dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer
2023-01-08 3:23 ` Laurent Pinchart
@ 2023-01-09 8:30 ` Tomi Valkeinen
2023-01-09 9:09 ` Laurent Pinchart
0 siblings, 1 reply; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-09 8:30 UTC (permalink / raw)
To: Laurent Pinchart
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut, Rob Herring
On 08/01/2023 05:23, Laurent Pinchart wrote:
> Hi Tomi,
>
> Thank you for the patch.
>
> On Thu, Jan 05, 2023 at 04:03:04PM +0200, Tomi Valkeinen wrote:
>> Add DT bindings for TI DS90UB960 FPD-Link III Deserializer.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
>> Reviewed-by: Rob Herring <robh@kernel.org>
>> ---
>> .../bindings/media/i2c/ti,ds90ub960.yaml | 402 ++++++++++++++++++
>> 1 file changed, 402 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
>> new file mode 100644
>> index 000000000000..664799ae55be
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
>> @@ -0,0 +1,402 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub960.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Texas Instruments DS90UB9XX Family FPD-Link Deserializer Hubs
>> +
>> +maintainers:
>> + - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
>> +
>> +description:
>> + The TI DS90UB9XX devices are FPD-Link video deserializers with I2C and GPIO
>> + forwarding.
>> +
>> +properties:
>> + compatible:
>> + enum:
>> + - ti,ds90ub960-q1
>> + - ti,ds90ub9702-q1
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + clocks:
>> + maxItems: 1
>> + description:
>> + Reference clock connected to the REFCLK pin.
>> +
>> + clock-names:
>> + items:
>> + - const: refclk
>> +
>> + powerdown-gpios:
>> + maxItems: 1
>> + description:
>> + Specifier for the GPIO connected to the PDB pin.
>> +
>> + i2c-alias-pool:
>> + $ref: /schemas/types.yaml#/definitions/uint16-array
>> + description:
>> + I2C alias pool is a pool of I2C addresses on the main I2C bus that can be
>> + used to access the remote peripherals on the serializer's I2C bus. The
>> + addresses must be available, not used by any other peripheral. Each
>> + remote peripheral is assigned an alias from the pool, and transactions to
>> + that address will be forwarded to the remote peripheral, with the address
>> + translated to the remote peripheral's real address. This property is not
>> + needed if there are no I2C addressable remote peripherals.
>> +
>> + links:
>> + type: object
>> + additionalProperties: false
>> +
>> + properties:
>> + '#address-cells':
>> + const: 1
>> +
>> + '#size-cells':
>> + const: 0
>> +
>> + ti,manual-strobe:
>> + type: boolean
>> + description:
>> + Enable manual strobe position and EQ level
>> +
>> + patternProperties:
>> + '^link@[0-3]$':
>> + type: object
>> + additionalProperties: false
>> + properties:
>> + reg:
>> + description: The link number
>> + maxItems: 1
>> +
>> + i2c-alias:
>> + description:
>> + The I2C address used for the serializer. Transactions to this
>> + address on the I2C bus where the deserializer resides are
>> + forwarded to the serializer.
>> +
>> + ti,rx-mode:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + enum:
>> + - 0 # RAW10
>> + - 1 # RAW12 HF
>> + - 2 # RAW12 LF
>> + - 3 # CSI2 SYNC
>> + - 4 # CSI2 NON-SYNC
>> + description:
>> + FPD-Link Input Mode. This should reflect the hardware and the
>> + default mode of the connected camera module.
>
> As the remote device may not be a camera, I'd write "of the connected
> device" or "of the connected serializer".
I was trying to include the sensor also in the "camera module", as the
sensor's "normal" pixel cloud would affect RAW modes (HF/LF). Perhaps
"connected device" covers this.
>> +
>> + ti,cdr-mode:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + enum:
>> + - 0 # FPD-Link III
>> + - 1 # FPD-Link IV
>> + description:
>> + FPD-Link CDR Mode. This should reflect the hardware and the
>> + default mode of the connected camera module.
>> +
>> + ti,strobe-pos:
>> + $ref: /schemas/types.yaml#/definitions/int32
>> + minimum: -13
>> + maximum: 13
>> + description: Manual strobe position
>> +
>> + ti,eq-level:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + maximum: 14
>> + description: Manual EQ level
>> +
>> + serializer:
>> + type: object
>> + description: FPD-Link Serializer node
>> +
>> + required:
>> + - reg
>> + - i2c-alias
>> + - ti,rx-mode
>> + - serializer
>> +
>> + ports:
>> + $ref: /schemas/graph.yaml#/properties/ports
>> +
>> + properties:
>> + port@0:
>> + $ref: /schemas/graph.yaml#/$defs/port-base
>> + unevaluatedProperties: false
>> + description: FPD-Link input 0
>> +
>> + properties:
>> + endpoint:
>> + $ref: /schemas/media/video-interfaces.yaml#
>> + unevaluatedProperties: false
>> + description:
>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
>> + hsync-active and vsync-active must be defined.
>> +
>> + port@1:
>> + $ref: /schemas/graph.yaml#/$defs/port-base
>> + unevaluatedProperties: false
>> + description: FPD-Link input 1
>> +
>> + properties:
>> + endpoint:
>> + $ref: /schemas/media/video-interfaces.yaml#
>> + unevaluatedProperties: false
>> + description:
>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
>> + hsync-active and vsync-active must be defined.
>> +
>> + port@2:
>> + $ref: /schemas/graph.yaml#/$defs/port-base
>> + unevaluatedProperties: false
>> + description: FPD-Link input 2
>> +
>> + properties:
>> + endpoint:
>> + $ref: /schemas/media/video-interfaces.yaml#
>> + unevaluatedProperties: false
>> + description:
>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
>> + hsync-active and vsync-active must be defined.
>> +
>> + port@3:
>> + $ref: /schemas/graph.yaml#/$defs/port-base
>> + unevaluatedProperties: false
>> + description: FPD-Link input 3
>> +
>> + properties:
>> + endpoint:
>> + $ref: /schemas/media/video-interfaces.yaml#
>> + unevaluatedProperties: false
>> + description:
>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
>> + hsync-active and vsync-active must be defined.
>> +
>> + port@4:
>> + $ref: /schemas/graph.yaml#/$defs/port-base
>> + unevaluatedProperties: false
>> + description: CSI-2 Output 0
>> +
>> + properties:
>> + endpoint:
>> + $ref: /schemas/media/video-interfaces.yaml#
>> + unevaluatedProperties: false
>> +
>> + properties:
>> + data-lanes:
>> + minItems: 1
>> + maxItems: 4
>> +
>> + required:
>> + - data-lanes
>> +
>> + port@5:
>> + $ref: /schemas/graph.yaml#/$defs/port-base
>> + unevaluatedProperties: false
>> + description: CSI-2 Output 1
>> +
>> + properties:
>> + endpoint:
>> + $ref: /schemas/media/video-interfaces.yaml#
>> + unevaluatedProperties: false
>> +
>> + properties:
>> + data-lanes:
>> + minItems: 1
>> + maxItems: 4
>> +
>> + required:
>> + - data-lanes
>
> I think you need
>
> required:
> - port@0
> - port@1
> - port@2
> - port@3
> - port@4
> - port@5
Is that needed? I think often some of the ports are unused (e.g. the
example in this yaml file). Is it customary to still require empty port
nodes in the DT?
Tomi
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [PATCH v6 5/8] dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer
2023-01-09 8:30 ` Tomi Valkeinen
@ 2023-01-09 9:09 ` Laurent Pinchart
2023-01-09 9:53 ` Tomi Valkeinen
0 siblings, 1 reply; 33+ messages in thread
From: Laurent Pinchart @ 2023-01-09 9:09 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut, Rob Herring
On Mon, Jan 09, 2023 at 10:30:13AM +0200, Tomi Valkeinen wrote:
> On 08/01/2023 05:23, Laurent Pinchart wrote:
> > Hi Tomi,
> >
> > Thank you for the patch.
> >
> > On Thu, Jan 05, 2023 at 04:03:04PM +0200, Tomi Valkeinen wrote:
> >> Add DT bindings for TI DS90UB960 FPD-Link III Deserializer.
> >>
> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> >> Reviewed-by: Rob Herring <robh@kernel.org>
> >> ---
> >> .../bindings/media/i2c/ti,ds90ub960.yaml | 402 ++++++++++++++++++
> >> 1 file changed, 402 insertions(+)
> >> create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> >>
> >> diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> >> new file mode 100644
> >> index 000000000000..664799ae55be
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> >> @@ -0,0 +1,402 @@
> >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> >> +%YAML 1.2
> >> +---
> >> +$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub960.yaml#
> >> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >> +
> >> +title: Texas Instruments DS90UB9XX Family FPD-Link Deserializer Hubs
> >> +
> >> +maintainers:
> >> + - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> >> +
> >> +description:
> >> + The TI DS90UB9XX devices are FPD-Link video deserializers with I2C and GPIO
> >> + forwarding.
> >> +
> >> +properties:
> >> + compatible:
> >> + enum:
> >> + - ti,ds90ub960-q1
> >> + - ti,ds90ub9702-q1
> >> +
> >> + reg:
> >> + maxItems: 1
> >> +
> >> + clocks:
> >> + maxItems: 1
> >> + description:
> >> + Reference clock connected to the REFCLK pin.
> >> +
> >> + clock-names:
> >> + items:
> >> + - const: refclk
> >> +
> >> + powerdown-gpios:
> >> + maxItems: 1
> >> + description:
> >> + Specifier for the GPIO connected to the PDB pin.
> >> +
> >> + i2c-alias-pool:
> >> + $ref: /schemas/types.yaml#/definitions/uint16-array
> >> + description:
> >> + I2C alias pool is a pool of I2C addresses on the main I2C bus that can be
> >> + used to access the remote peripherals on the serializer's I2C bus. The
> >> + addresses must be available, not used by any other peripheral. Each
> >> + remote peripheral is assigned an alias from the pool, and transactions to
> >> + that address will be forwarded to the remote peripheral, with the address
> >> + translated to the remote peripheral's real address. This property is not
> >> + needed if there are no I2C addressable remote peripherals.
> >> +
> >> + links:
> >> + type: object
> >> + additionalProperties: false
> >> +
> >> + properties:
> >> + '#address-cells':
> >> + const: 1
> >> +
> >> + '#size-cells':
> >> + const: 0
> >> +
> >> + ti,manual-strobe:
> >> + type: boolean
> >> + description:
> >> + Enable manual strobe position and EQ level
> >> +
> >> + patternProperties:
> >> + '^link@[0-3]$':
> >> + type: object
> >> + additionalProperties: false
> >> + properties:
> >> + reg:
> >> + description: The link number
> >> + maxItems: 1
> >> +
> >> + i2c-alias:
> >> + description:
> >> + The I2C address used for the serializer. Transactions to this
> >> + address on the I2C bus where the deserializer resides are
> >> + forwarded to the serializer.
> >> +
> >> + ti,rx-mode:
> >> + $ref: /schemas/types.yaml#/definitions/uint32
> >> + enum:
> >> + - 0 # RAW10
> >> + - 1 # RAW12 HF
> >> + - 2 # RAW12 LF
> >> + - 3 # CSI2 SYNC
> >> + - 4 # CSI2 NON-SYNC
> >> + description:
> >> + FPD-Link Input Mode. This should reflect the hardware and the
> >> + default mode of the connected camera module.
> >
> > As the remote device may not be a camera, I'd write "of the connected
> > device" or "of the connected serializer".
>
> I was trying to include the sensor also in the "camera module", as the
> sensor's "normal" pixel cloud would affect RAW modes (HF/LF). Perhaps
> "connected device" covers this.
>
> >> +
> >> + ti,cdr-mode:
> >> + $ref: /schemas/types.yaml#/definitions/uint32
> >> + enum:
> >> + - 0 # FPD-Link III
> >> + - 1 # FPD-Link IV
> >> + description:
> >> + FPD-Link CDR Mode. This should reflect the hardware and the
> >> + default mode of the connected camera module.
> >> +
> >> + ti,strobe-pos:
> >> + $ref: /schemas/types.yaml#/definitions/int32
> >> + minimum: -13
> >> + maximum: 13
> >> + description: Manual strobe position
> >> +
> >> + ti,eq-level:
> >> + $ref: /schemas/types.yaml#/definitions/uint32
> >> + maximum: 14
> >> + description: Manual EQ level
> >> +
> >> + serializer:
> >> + type: object
> >> + description: FPD-Link Serializer node
> >> +
> >> + required:
> >> + - reg
> >> + - i2c-alias
> >> + - ti,rx-mode
> >> + - serializer
> >> +
> >> + ports:
> >> + $ref: /schemas/graph.yaml#/properties/ports
> >> +
> >> + properties:
> >> + port@0:
> >> + $ref: /schemas/graph.yaml#/$defs/port-base
> >> + unevaluatedProperties: false
> >> + description: FPD-Link input 0
> >> +
> >> + properties:
> >> + endpoint:
> >> + $ref: /schemas/media/video-interfaces.yaml#
> >> + unevaluatedProperties: false
> >> + description:
> >> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> >> + hsync-active and vsync-active must be defined.
> >> +
> >> + port@1:
> >> + $ref: /schemas/graph.yaml#/$defs/port-base
> >> + unevaluatedProperties: false
> >> + description: FPD-Link input 1
> >> +
> >> + properties:
> >> + endpoint:
> >> + $ref: /schemas/media/video-interfaces.yaml#
> >> + unevaluatedProperties: false
> >> + description:
> >> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> >> + hsync-active and vsync-active must be defined.
> >> +
> >> + port@2:
> >> + $ref: /schemas/graph.yaml#/$defs/port-base
> >> + unevaluatedProperties: false
> >> + description: FPD-Link input 2
> >> +
> >> + properties:
> >> + endpoint:
> >> + $ref: /schemas/media/video-interfaces.yaml#
> >> + unevaluatedProperties: false
> >> + description:
> >> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> >> + hsync-active and vsync-active must be defined.
> >> +
> >> + port@3:
> >> + $ref: /schemas/graph.yaml#/$defs/port-base
> >> + unevaluatedProperties: false
> >> + description: FPD-Link input 3
> >> +
> >> + properties:
> >> + endpoint:
> >> + $ref: /schemas/media/video-interfaces.yaml#
> >> + unevaluatedProperties: false
> >> + description:
> >> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> >> + hsync-active and vsync-active must be defined.
> >> +
> >> + port@4:
> >> + $ref: /schemas/graph.yaml#/$defs/port-base
> >> + unevaluatedProperties: false
> >> + description: CSI-2 Output 0
> >> +
> >> + properties:
> >> + endpoint:
> >> + $ref: /schemas/media/video-interfaces.yaml#
> >> + unevaluatedProperties: false
> >> +
> >> + properties:
> >> + data-lanes:
> >> + minItems: 1
> >> + maxItems: 4
> >> +
> >> + required:
> >> + - data-lanes
> >> +
> >> + port@5:
> >> + $ref: /schemas/graph.yaml#/$defs/port-base
> >> + unevaluatedProperties: false
> >> + description: CSI-2 Output 1
> >> +
> >> + properties:
> >> + endpoint:
> >> + $ref: /schemas/media/video-interfaces.yaml#
> >> + unevaluatedProperties: false
> >> +
> >> + properties:
> >> + data-lanes:
> >> + minItems: 1
> >> + maxItems: 4
> >> +
> >> + required:
> >> + - data-lanes
> >
> > I think you need
> >
> > required:
> > - port@0
> > - port@1
> > - port@2
> > - port@3
> > - port@4
> > - port@5
>
> Is that needed? I think often some of the ports are unused (e.g. the
> example in this yaml file). Is it customary to still require empty port
> nodes in the DT?
Ports are an intrinsic property of a device, they don't depend on the
device integration in the system. In this case, the UB960 has four
FPD-Link inputs and two CSI-2 outputs, that's a property of the chip.
They don't have to be connected to anything on the board, so endpooints
are optional.
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [PATCH v6 5/8] dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer
2023-01-09 9:09 ` Laurent Pinchart
@ 2023-01-09 9:53 ` Tomi Valkeinen
2023-01-09 10:07 ` Laurent Pinchart
0 siblings, 1 reply; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-09 9:53 UTC (permalink / raw)
To: Laurent Pinchart
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut, Rob Herring
On 09/01/2023 11:09, Laurent Pinchart wrote:
> On Mon, Jan 09, 2023 at 10:30:13AM +0200, Tomi Valkeinen wrote:
>> On 08/01/2023 05:23, Laurent Pinchart wrote:
>>> Hi Tomi,
>>>
>>> Thank you for the patch.
>>>
>>> On Thu, Jan 05, 2023 at 04:03:04PM +0200, Tomi Valkeinen wrote:
>>>> Add DT bindings for TI DS90UB960 FPD-Link III Deserializer.
>>>>
>>>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
>>>> Reviewed-by: Rob Herring <robh@kernel.org>
>>>> ---
>>>> .../bindings/media/i2c/ti,ds90ub960.yaml | 402 ++++++++++++++++++
>>>> 1 file changed, 402 insertions(+)
>>>> create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
>>>> new file mode 100644
>>>> index 000000000000..664799ae55be
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
>>>> @@ -0,0 +1,402 @@
>>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>>> +%YAML 1.2
>>>> +---
>>>> +$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub960.yaml#
>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>>> +
>>>> +title: Texas Instruments DS90UB9XX Family FPD-Link Deserializer Hubs
>>>> +
>>>> +maintainers:
>>>> + - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
>>>> +
>>>> +description:
>>>> + The TI DS90UB9XX devices are FPD-Link video deserializers with I2C and GPIO
>>>> + forwarding.
>>>> +
>>>> +properties:
>>>> + compatible:
>>>> + enum:
>>>> + - ti,ds90ub960-q1
>>>> + - ti,ds90ub9702-q1
>>>> +
>>>> + reg:
>>>> + maxItems: 1
>>>> +
>>>> + clocks:
>>>> + maxItems: 1
>>>> + description:
>>>> + Reference clock connected to the REFCLK pin.
>>>> +
>>>> + clock-names:
>>>> + items:
>>>> + - const: refclk
>>>> +
>>>> + powerdown-gpios:
>>>> + maxItems: 1
>>>> + description:
>>>> + Specifier for the GPIO connected to the PDB pin.
>>>> +
>>>> + i2c-alias-pool:
>>>> + $ref: /schemas/types.yaml#/definitions/uint16-array
>>>> + description:
>>>> + I2C alias pool is a pool of I2C addresses on the main I2C bus that can be
>>>> + used to access the remote peripherals on the serializer's I2C bus. The
>>>> + addresses must be available, not used by any other peripheral. Each
>>>> + remote peripheral is assigned an alias from the pool, and transactions to
>>>> + that address will be forwarded to the remote peripheral, with the address
>>>> + translated to the remote peripheral's real address. This property is not
>>>> + needed if there are no I2C addressable remote peripherals.
>>>> +
>>>> + links:
>>>> + type: object
>>>> + additionalProperties: false
>>>> +
>>>> + properties:
>>>> + '#address-cells':
>>>> + const: 1
>>>> +
>>>> + '#size-cells':
>>>> + const: 0
>>>> +
>>>> + ti,manual-strobe:
>>>> + type: boolean
>>>> + description:
>>>> + Enable manual strobe position and EQ level
>>>> +
>>>> + patternProperties:
>>>> + '^link@[0-3]$':
>>>> + type: object
>>>> + additionalProperties: false
>>>> + properties:
>>>> + reg:
>>>> + description: The link number
>>>> + maxItems: 1
>>>> +
>>>> + i2c-alias:
>>>> + description:
>>>> + The I2C address used for the serializer. Transactions to this
>>>> + address on the I2C bus where the deserializer resides are
>>>> + forwarded to the serializer.
>>>> +
>>>> + ti,rx-mode:
>>>> + $ref: /schemas/types.yaml#/definitions/uint32
>>>> + enum:
>>>> + - 0 # RAW10
>>>> + - 1 # RAW12 HF
>>>> + - 2 # RAW12 LF
>>>> + - 3 # CSI2 SYNC
>>>> + - 4 # CSI2 NON-SYNC
>>>> + description:
>>>> + FPD-Link Input Mode. This should reflect the hardware and the
>>>> + default mode of the connected camera module.
>>>
>>> As the remote device may not be a camera, I'd write "of the connected
>>> device" or "of the connected serializer".
>>
>> I was trying to include the sensor also in the "camera module", as the
>> sensor's "normal" pixel cloud would affect RAW modes (HF/LF). Perhaps
>> "connected device" covers this.
>>
>>>> +
>>>> + ti,cdr-mode:
>>>> + $ref: /schemas/types.yaml#/definitions/uint32
>>>> + enum:
>>>> + - 0 # FPD-Link III
>>>> + - 1 # FPD-Link IV
>>>> + description:
>>>> + FPD-Link CDR Mode. This should reflect the hardware and the
>>>> + default mode of the connected camera module.
>>>> +
>>>> + ti,strobe-pos:
>>>> + $ref: /schemas/types.yaml#/definitions/int32
>>>> + minimum: -13
>>>> + maximum: 13
>>>> + description: Manual strobe position
>>>> +
>>>> + ti,eq-level:
>>>> + $ref: /schemas/types.yaml#/definitions/uint32
>>>> + maximum: 14
>>>> + description: Manual EQ level
>>>> +
>>>> + serializer:
>>>> + type: object
>>>> + description: FPD-Link Serializer node
>>>> +
>>>> + required:
>>>> + - reg
>>>> + - i2c-alias
>>>> + - ti,rx-mode
>>>> + - serializer
>>>> +
>>>> + ports:
>>>> + $ref: /schemas/graph.yaml#/properties/ports
>>>> +
>>>> + properties:
>>>> + port@0:
>>>> + $ref: /schemas/graph.yaml#/$defs/port-base
>>>> + unevaluatedProperties: false
>>>> + description: FPD-Link input 0
>>>> +
>>>> + properties:
>>>> + endpoint:
>>>> + $ref: /schemas/media/video-interfaces.yaml#
>>>> + unevaluatedProperties: false
>>>> + description:
>>>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
>>>> + hsync-active and vsync-active must be defined.
>>>> +
>>>> + port@1:
>>>> + $ref: /schemas/graph.yaml#/$defs/port-base
>>>> + unevaluatedProperties: false
>>>> + description: FPD-Link input 1
>>>> +
>>>> + properties:
>>>> + endpoint:
>>>> + $ref: /schemas/media/video-interfaces.yaml#
>>>> + unevaluatedProperties: false
>>>> + description:
>>>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
>>>> + hsync-active and vsync-active must be defined.
>>>> +
>>>> + port@2:
>>>> + $ref: /schemas/graph.yaml#/$defs/port-base
>>>> + unevaluatedProperties: false
>>>> + description: FPD-Link input 2
>>>> +
>>>> + properties:
>>>> + endpoint:
>>>> + $ref: /schemas/media/video-interfaces.yaml#
>>>> + unevaluatedProperties: false
>>>> + description:
>>>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
>>>> + hsync-active and vsync-active must be defined.
>>>> +
>>>> + port@3:
>>>> + $ref: /schemas/graph.yaml#/$defs/port-base
>>>> + unevaluatedProperties: false
>>>> + description: FPD-Link input 3
>>>> +
>>>> + properties:
>>>> + endpoint:
>>>> + $ref: /schemas/media/video-interfaces.yaml#
>>>> + unevaluatedProperties: false
>>>> + description:
>>>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
>>>> + hsync-active and vsync-active must be defined.
>>>> +
>>>> + port@4:
>>>> + $ref: /schemas/graph.yaml#/$defs/port-base
>>>> + unevaluatedProperties: false
>>>> + description: CSI-2 Output 0
>>>> +
>>>> + properties:
>>>> + endpoint:
>>>> + $ref: /schemas/media/video-interfaces.yaml#
>>>> + unevaluatedProperties: false
>>>> +
>>>> + properties:
>>>> + data-lanes:
>>>> + minItems: 1
>>>> + maxItems: 4
>>>> +
>>>> + required:
>>>> + - data-lanes
>>>> +
>>>> + port@5:
>>>> + $ref: /schemas/graph.yaml#/$defs/port-base
>>>> + unevaluatedProperties: false
>>>> + description: CSI-2 Output 1
>>>> +
>>>> + properties:
>>>> + endpoint:
>>>> + $ref: /schemas/media/video-interfaces.yaml#
>>>> + unevaluatedProperties: false
>>>> +
>>>> + properties:
>>>> + data-lanes:
>>>> + minItems: 1
>>>> + maxItems: 4
>>>> +
>>>> + required:
>>>> + - data-lanes
>>>
>>> I think you need
>>>
>>> required:
>>> - port@0
>>> - port@1
>>> - port@2
>>> - port@3
>>> - port@4
>>> - port@5
>>
>> Is that needed? I think often some of the ports are unused (e.g. the
>> example in this yaml file). Is it customary to still require empty port
>> nodes in the DT?
>
> Ports are an intrinsic property of a device, they don't depend on the
> device integration in the system. In this case, the UB960 has four
> FPD-Link inputs and two CSI-2 outputs, that's a property of the chip.
> They don't have to be connected to anything on the board, so endpooints
> are optional.
Yes, but why do they have to be required? A missing port node implies
that it's not used, doesn't it? I don't mind much, it just feels a bit
extra to add multiple almost empty "port@X { reg = <X>; };" style nodes
to the dts file.
Tomi
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 5/8] dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer
2023-01-09 9:53 ` Tomi Valkeinen
@ 2023-01-09 10:07 ` Laurent Pinchart
0 siblings, 0 replies; 33+ messages in thread
From: Laurent Pinchart @ 2023-01-09 10:07 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut, Rob Herring
On Mon, Jan 09, 2023 at 11:53:22AM +0200, Tomi Valkeinen wrote:
> On 09/01/2023 11:09, Laurent Pinchart wrote:
> > On Mon, Jan 09, 2023 at 10:30:13AM +0200, Tomi Valkeinen wrote:
> >> On 08/01/2023 05:23, Laurent Pinchart wrote:
> >>> Hi Tomi,
> >>>
> >>> Thank you for the patch.
> >>>
> >>> On Thu, Jan 05, 2023 at 04:03:04PM +0200, Tomi Valkeinen wrote:
> >>>> Add DT bindings for TI DS90UB960 FPD-Link III Deserializer.
> >>>>
> >>>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> >>>> Reviewed-by: Rob Herring <robh@kernel.org>
> >>>> ---
> >>>> .../bindings/media/i2c/ti,ds90ub960.yaml | 402 ++++++++++++++++++
> >>>> 1 file changed, 402 insertions(+)
> >>>> create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> >>>>
> >>>> diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> >>>> new file mode 100644
> >>>> index 000000000000..664799ae55be
> >>>> --- /dev/null
> >>>> +++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> >>>> @@ -0,0 +1,402 @@
> >>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> >>>> +%YAML 1.2
> >>>> +---
> >>>> +$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub960.yaml#
> >>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >>>> +
> >>>> +title: Texas Instruments DS90UB9XX Family FPD-Link Deserializer Hubs
> >>>> +
> >>>> +maintainers:
> >>>> + - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> >>>> +
> >>>> +description:
> >>>> + The TI DS90UB9XX devices are FPD-Link video deserializers with I2C and GPIO
> >>>> + forwarding.
> >>>> +
> >>>> +properties:
> >>>> + compatible:
> >>>> + enum:
> >>>> + - ti,ds90ub960-q1
> >>>> + - ti,ds90ub9702-q1
> >>>> +
> >>>> + reg:
> >>>> + maxItems: 1
> >>>> +
> >>>> + clocks:
> >>>> + maxItems: 1
> >>>> + description:
> >>>> + Reference clock connected to the REFCLK pin.
> >>>> +
> >>>> + clock-names:
> >>>> + items:
> >>>> + - const: refclk
> >>>> +
> >>>> + powerdown-gpios:
> >>>> + maxItems: 1
> >>>> + description:
> >>>> + Specifier for the GPIO connected to the PDB pin.
> >>>> +
> >>>> + i2c-alias-pool:
> >>>> + $ref: /schemas/types.yaml#/definitions/uint16-array
> >>>> + description:
> >>>> + I2C alias pool is a pool of I2C addresses on the main I2C bus that can be
> >>>> + used to access the remote peripherals on the serializer's I2C bus. The
> >>>> + addresses must be available, not used by any other peripheral. Each
> >>>> + remote peripheral is assigned an alias from the pool, and transactions to
> >>>> + that address will be forwarded to the remote peripheral, with the address
> >>>> + translated to the remote peripheral's real address. This property is not
> >>>> + needed if there are no I2C addressable remote peripherals.
> >>>> +
> >>>> + links:
> >>>> + type: object
> >>>> + additionalProperties: false
> >>>> +
> >>>> + properties:
> >>>> + '#address-cells':
> >>>> + const: 1
> >>>> +
> >>>> + '#size-cells':
> >>>> + const: 0
> >>>> +
> >>>> + ti,manual-strobe:
> >>>> + type: boolean
> >>>> + description:
> >>>> + Enable manual strobe position and EQ level
> >>>> +
> >>>> + patternProperties:
> >>>> + '^link@[0-3]$':
> >>>> + type: object
> >>>> + additionalProperties: false
> >>>> + properties:
> >>>> + reg:
> >>>> + description: The link number
> >>>> + maxItems: 1
> >>>> +
> >>>> + i2c-alias:
> >>>> + description:
> >>>> + The I2C address used for the serializer. Transactions to this
> >>>> + address on the I2C bus where the deserializer resides are
> >>>> + forwarded to the serializer.
> >>>> +
> >>>> + ti,rx-mode:
> >>>> + $ref: /schemas/types.yaml#/definitions/uint32
> >>>> + enum:
> >>>> + - 0 # RAW10
> >>>> + - 1 # RAW12 HF
> >>>> + - 2 # RAW12 LF
> >>>> + - 3 # CSI2 SYNC
> >>>> + - 4 # CSI2 NON-SYNC
> >>>> + description:
> >>>> + FPD-Link Input Mode. This should reflect the hardware and the
> >>>> + default mode of the connected camera module.
> >>>
> >>> As the remote device may not be a camera, I'd write "of the connected
> >>> device" or "of the connected serializer".
> >>
> >> I was trying to include the sensor also in the "camera module", as the
> >> sensor's "normal" pixel cloud would affect RAW modes (HF/LF). Perhaps
> >> "connected device" covers this.
> >>
> >>>> +
> >>>> + ti,cdr-mode:
> >>>> + $ref: /schemas/types.yaml#/definitions/uint32
> >>>> + enum:
> >>>> + - 0 # FPD-Link III
> >>>> + - 1 # FPD-Link IV
> >>>> + description:
> >>>> + FPD-Link CDR Mode. This should reflect the hardware and the
> >>>> + default mode of the connected camera module.
> >>>> +
> >>>> + ti,strobe-pos:
> >>>> + $ref: /schemas/types.yaml#/definitions/int32
> >>>> + minimum: -13
> >>>> + maximum: 13
> >>>> + description: Manual strobe position
> >>>> +
> >>>> + ti,eq-level:
> >>>> + $ref: /schemas/types.yaml#/definitions/uint32
> >>>> + maximum: 14
> >>>> + description: Manual EQ level
> >>>> +
> >>>> + serializer:
> >>>> + type: object
> >>>> + description: FPD-Link Serializer node
> >>>> +
> >>>> + required:
> >>>> + - reg
> >>>> + - i2c-alias
> >>>> + - ti,rx-mode
> >>>> + - serializer
> >>>> +
> >>>> + ports:
> >>>> + $ref: /schemas/graph.yaml#/properties/ports
> >>>> +
> >>>> + properties:
> >>>> + port@0:
> >>>> + $ref: /schemas/graph.yaml#/$defs/port-base
> >>>> + unevaluatedProperties: false
> >>>> + description: FPD-Link input 0
> >>>> +
> >>>> + properties:
> >>>> + endpoint:
> >>>> + $ref: /schemas/media/video-interfaces.yaml#
> >>>> + unevaluatedProperties: false
> >>>> + description:
> >>>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> >>>> + hsync-active and vsync-active must be defined.
> >>>> +
> >>>> + port@1:
> >>>> + $ref: /schemas/graph.yaml#/$defs/port-base
> >>>> + unevaluatedProperties: false
> >>>> + description: FPD-Link input 1
> >>>> +
> >>>> + properties:
> >>>> + endpoint:
> >>>> + $ref: /schemas/media/video-interfaces.yaml#
> >>>> + unevaluatedProperties: false
> >>>> + description:
> >>>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> >>>> + hsync-active and vsync-active must be defined.
> >>>> +
> >>>> + port@2:
> >>>> + $ref: /schemas/graph.yaml#/$defs/port-base
> >>>> + unevaluatedProperties: false
> >>>> + description: FPD-Link input 2
> >>>> +
> >>>> + properties:
> >>>> + endpoint:
> >>>> + $ref: /schemas/media/video-interfaces.yaml#
> >>>> + unevaluatedProperties: false
> >>>> + description:
> >>>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> >>>> + hsync-active and vsync-active must be defined.
> >>>> +
> >>>> + port@3:
> >>>> + $ref: /schemas/graph.yaml#/$defs/port-base
> >>>> + unevaluatedProperties: false
> >>>> + description: FPD-Link input 3
> >>>> +
> >>>> + properties:
> >>>> + endpoint:
> >>>> + $ref: /schemas/media/video-interfaces.yaml#
> >>>> + unevaluatedProperties: false
> >>>> + description:
> >>>> + Endpoint for FPD-Link port. If the RX mode for this port is RAW,
> >>>> + hsync-active and vsync-active must be defined.
> >>>> +
> >>>> + port@4:
> >>>> + $ref: /schemas/graph.yaml#/$defs/port-base
> >>>> + unevaluatedProperties: false
> >>>> + description: CSI-2 Output 0
> >>>> +
> >>>> + properties:
> >>>> + endpoint:
> >>>> + $ref: /schemas/media/video-interfaces.yaml#
> >>>> + unevaluatedProperties: false
> >>>> +
> >>>> + properties:
> >>>> + data-lanes:
> >>>> + minItems: 1
> >>>> + maxItems: 4
> >>>> +
> >>>> + required:
> >>>> + - data-lanes
> >>>> +
> >>>> + port@5:
> >>>> + $ref: /schemas/graph.yaml#/$defs/port-base
> >>>> + unevaluatedProperties: false
> >>>> + description: CSI-2 Output 1
> >>>> +
> >>>> + properties:
> >>>> + endpoint:
> >>>> + $ref: /schemas/media/video-interfaces.yaml#
> >>>> + unevaluatedProperties: false
> >>>> +
> >>>> + properties:
> >>>> + data-lanes:
> >>>> + minItems: 1
> >>>> + maxItems: 4
> >>>> +
> >>>> + required:
> >>>> + - data-lanes
> >>>
> >>> I think you need
> >>>
> >>> required:
> >>> - port@0
> >>> - port@1
> >>> - port@2
> >>> - port@3
> >>> - port@4
> >>> - port@5
> >>
> >> Is that needed? I think often some of the ports are unused (e.g. the
> >> example in this yaml file). Is it customary to still require empty port
> >> nodes in the DT?
> >
> > Ports are an intrinsic property of a device, they don't depend on the
> > device integration in the system. In this case, the UB960 has four
> > FPD-Link inputs and two CSI-2 outputs, that's a property of the chip.
> > They don't have to be connected to anything on the board, so endpooints
> > are optional.
>
> Yes, but why do they have to be required? A missing port node implies
> that it's not used, doesn't it? I don't mind much, it just feels a bit
> extra to add multiple almost empty "port@X { reg = <X>; };" style nodes
> to the dts file.
Lots of them are in .dtsi files, so it's not that bad. The main reasons I
push for making ports mandatory are uniformity (lots of bindings do so,
albeit some because I wrote them or asked for changes during review
:-)), and simplified port handling on the driver side.
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 33+ messages in thread
* [PATCH v6 6/8] media: i2c: add DS90UB960 driver
2023-01-05 14:02 [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
` (4 preceding siblings ...)
2023-01-05 14:03 ` [PATCH v6 5/8] dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer Tomi Valkeinen
@ 2023-01-05 14:03 ` Tomi Valkeinen
2023-01-05 14:03 ` [PATCH v6 7/8] media: i2c: add DS90UB913 driver Tomi Valkeinen
` (2 subsequent siblings)
8 siblings, 0 replies; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-05 14:03 UTC (permalink / raw)
To: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen
Cc: Mauro Carvalho Chehab, Peter Rosin, Liam Girdwood, Mark Brown,
Sakari Ailus, Laurent Pinchart, Michael Tretter, Shawn Tu,
Hans Verkuil, Mike Pagano, Krzysztof Hałasa, Marek Vasut,
Tomi Valkeinen
Add driver for TI DS90UB960 FPD-Link III Deserializer.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
MAINTAINERS | 8 +
drivers/media/i2c/Kconfig | 21 +
drivers/media/i2c/Makefile | 2 +
drivers/media/i2c/ds90ub960.c | 4295 +++++++++++++++++++++++++++++++++
include/media/i2c/ds90ub9xx.h | 16 +
5 files changed, 4342 insertions(+)
create mode 100644 drivers/media/i2c/ds90ub960.c
create mode 100644 include/media/i2c/ds90ub9xx.h
diff --git a/MAINTAINERS b/MAINTAINERS
index ba716f2861cf..d0dc8572191d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20626,6 +20626,14 @@ F: drivers/misc/tifm*
F: drivers/mmc/host/tifm_sd.c
F: include/linux/tifm.h
+TI FPD-LINK DRIVERS
+M: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/ti,ds90*
+F: drivers/media/i2c/ds90*
+F: include/media/i2c/ds90*
+
TI KEYSTONE MULTICORE NAVIGATOR DRIVERS
M: Nishanth Menon <nm@ti.com>
M: Santosh Shilimkar <ssantosh@kernel.org>
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 7806d4b81716..f95a54454e17 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -1595,4 +1595,25 @@ config VIDEO_THS7303
endmenu
+#
+# Video serializers and deserializers (e.g. FPD-Link)
+#
+
+menu "Video serializers and deserializers"
+
+config VIDEO_DS90UB960
+ tristate "TI DS90UB960 Deserializer"
+ depends on OF && I2C && VIDEO_DEV
+ select MEDIA_CONTROLLER
+ select VIDEO_V4L2_SUBDEV_API
+ select V4L2_FWNODE
+ select REGMAP_I2C
+ select OF_GPIO
+ select I2C_ATR
+ help
+ Device driver for the Texas Instruments DS90UB960
+ FPD-Link III Deserializer and DS90UB9702 FPD-Link IV Deserializer.
+
+endmenu
+
endif # VIDEO_DEV
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 0a2933103dd9..2735b00437bb 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -142,3 +142,5 @@ obj-$(CONFIG_VIDEO_VPX3220) += vpx3220.o
obj-$(CONFIG_VIDEO_VS6624) += vs6624.o
obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
+obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
+
diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c
new file mode 100644
index 000000000000..b532a93f3da7
--- /dev/null
+++ b/drivers/media/i2c/ds90ub960.c
@@ -0,0 +1,4295 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for the Texas Instruments DS90UB960-Q1 video deserializer
+ *
+ * Copyright (c) 2019 Luca Ceresoli <luca@lucaceresoli.net>
+ * Copyright (c) 2022 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c-atr.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+#include <media/i2c/ds90ub9xx.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-subdev.h>
+
+#define UB960_POLL_TIME_MS 500
+
+#define UB960_MAX_RX_NPORTS 4
+#define UB960_MAX_TX_NPORTS 2
+#define UB960_MAX_NPORTS (UB960_MAX_RX_NPORTS + UB960_MAX_TX_NPORTS)
+
+#define UB960_MAX_PORT_ALIASES 8
+#define UB960_MAX_POOL_ALIASES (UB960_MAX_RX_NPORTS * UB960_MAX_PORT_ALIASES)
+
+#define UB960_NUM_BC_GPIOS 4
+
+/*
+ * Register map
+ *
+ * 0x00-0x32 Shared (UB960_SR)
+ * 0x33-0x3A CSI-2 TX (per-port paged on DS90UB960, shared on 954) (UB960_TR)
+ * 0x4C Shared (UB960_SR)
+ * 0x4D-0x7F FPD-Link RX, per-port paged (UB960_RR)
+ * 0xB0-0xBF Shared (UB960_SR)
+ * 0xD0-0xDF FPD-Link RX, per-port paged (UB960_RR)
+ * 0xF0-0xF5 Shared (UB960_SR)
+ * 0xF8-0xFB Shared (UB960_SR)
+ * All others Reserved
+ *
+ * Register prefixes:
+ * UB960_SR_* = Shared register
+ * UB960_RR_* = FPD-Link RX, per-port paged register
+ * UB960_TR_* = CSI-2 TX, per-port paged register
+ * UB960_XR_* = Reserved register
+ * UB960_IR_* = Indirect register
+ */
+
+#define UB960_SR_I2C_DEV_ID 0x00
+#define UB960_SR_RESET 0x01
+#define UB960_SR_RESET_DIGITAL_RESET1 BIT(1)
+#define UB960_SR_RESET_DIGITAL_RESET0 BIT(0)
+#define UB960_SR_RESET_GPIO_LOCK_RELEASE BIT(5)
+
+#define UB960_SR_GEN_CONFIG 0x02
+#define UB960_SR_REV_MASK 0x03
+#define UB960_SR_DEVICE_STS 0x04
+#define UB960_SR_PAR_ERR_THOLD_HI 0x05
+#define UB960_SR_PAR_ERR_THOLD_LO 0x06
+#define UB960_SR_BCC_WDOG_CTL 0x07
+#define UB960_SR_I2C_CTL1 0x08
+#define UB960_SR_I2C_CTL2 0x09
+#define UB960_SR_SCL_HIGH_TIME 0x0A
+#define UB960_SR_SCL_LOW_TIME 0x0B
+#define UB960_SR_RX_PORT_CTL 0x0C
+#define UB960_SR_IO_CTL 0x0D
+#define UB960_SR_GPIO_PIN_STS 0x0E
+#define UB960_SR_GPIO_INPUT_CTL 0x0F
+#define UB960_SR_GPIO_PIN_CTL(n) (0x10 + (n)) /* n < UB960_NUM_GPIOS */
+#define UB960_SR_GPIO_PIN_CTL_GPIO_OUT_SEL 5
+#define UB960_SR_GPIO_PIN_CTL_GPIO_OUT_SRC_SHIFT 2
+#define UB960_SR_GPIO_PIN_CTL_GPIO_OUT_EN BIT(0)
+
+#define UB960_SR_FS_CTL 0x18
+#define UB960_SR_FS_HIGH_TIME_1 0x19
+#define UB960_SR_FS_HIGH_TIME_0 0x1A
+#define UB960_SR_FS_LOW_TIME_1 0x1B
+#define UB960_SR_FS_LOW_TIME_0 0x1C
+#define UB960_SR_MAX_FRM_HI 0x1D
+#define UB960_SR_MAX_FRM_LO 0x1E
+#define UB960_SR_CSI_PLL_CTL 0x1F
+
+#define UB960_SR_FWD_CTL1 0x20
+#define UB960_SR_FWD_CTL1_PORT_DIS(n) BIT((n) + 4)
+
+#define UB960_SR_FWD_CTL2 0x21
+#define UB960_SR_FWD_STS 0x22
+
+#define UB960_SR_INTERRUPT_CTL 0x23
+#define UB960_SR_INTERRUPT_CTL_INT_EN BIT(7)
+#define UB960_SR_INTERRUPT_CTL_IE_CSI_TX0 BIT(4)
+#define UB960_SR_INTERRUPT_CTL_IE_RX(n) BIT((n)) /* rxport[n] IRQ */
+#define UB960_SR_INTERRUPT_CTL_ALL 0x83 /* TODO 0x93 to enable CSI */
+
+#define UB960_SR_INTERRUPT_STS 0x24
+#define UB960_SR_INTERRUPT_STS_INT BIT(7)
+#define UB960_SR_INTERRUPT_STS_IS_CSI_TX(n) BIT(4 + (n)) /* txport[n] IRQ */
+#define UB960_SR_INTERRUPT_STS_IS_RX(n) BIT((n)) /* rxport[n] IRQ */
+
+#define UB960_SR_TS_CONFIG 0x25
+#define UB960_SR_TS_CONTROL 0x26
+#define UB960_SR_TS_LINE_HI 0x27
+#define UB960_SR_TS_LINE_LO 0x28
+#define UB960_SR_TS_STATUS 0x29
+#define UB960_SR_TIMESTAMP_P0_HI 0x2A
+#define UB960_SR_TIMESTAMP_P0_LO 0x2B
+#define UB960_SR_TIMESTAMP_P1_HI 0x2C
+#define UB960_SR_TIMESTAMP_P1_LO 0x2D
+
+#define UB960_SR_CSI_PORT_SEL 0x32
+
+#define UB960_TR_CSI_CTL 0x33
+#define UB960_TR_CSI_CTL_CSI_CAL_EN BIT(6)
+#define UB960_TR_CSI_CTL_CSI_ENABLE BIT(0)
+
+#define UB960_TR_CSI_CTL2 0x34
+#define UB960_TR_CSI_STS 0x35
+#define UB960_TR_CSI_TX_ICR 0x36
+
+#define UB960_TR_CSI_TX_ISR 0x37
+#define UB960_TR_CSI_TX_ISR_IS_CSI_SYNC_ERROR BIT(3)
+#define UB960_TR_CSI_TX_ISR_IS_CSI_PASS_ERROR BIT(1)
+
+#define UB960_TR_CSI_TEST_CTL 0x38
+#define UB960_TR_CSI_TEST_PATT_HI 0x39
+#define UB960_TR_CSI_TEST_PATT_LO 0x3A
+
+#define UB960_XR_SFILTER_CFG 0x41
+#define UB960_XR_SFILTER_CFG_SFILTER_MAX_SHIFT 4
+#define UB960_XR_SFILTER_CFG_SFILTER_MIN_SHIFT 0
+
+#define UB960_XR_AEQ_CTL1 0x42
+#define UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_SHIFT 4
+#define UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN BIT(0)
+
+#define UB960_XR_AEQ_ERR_THOLD 0x43
+
+#define UB960_RR_BCC_ERR_CTL 0x46
+#define UB960_RR_BCC_STATUS 0x47
+#define UB960_RR_BCC_STATUS_SEQ_ERROR BIT(5)
+#define UB960_RR_BCC_STATUS_MASTER_ERR BIT(4)
+#define UB960_RR_BCC_STATUS_MASTER_TO BIT(3)
+#define UB960_RR_BCC_STATUS_SLAVE_ERR BIT(2)
+#define UB960_RR_BCC_STATUS_SLAVE_TO BIT(1)
+#define UB960_RR_BCC_STATUS_RESP_ERR BIT(0)
+
+#define UB960_RR_FPD3_CAP 0x4A
+#define UB960_RR_RAW_EMBED_DTYPE 0x4B
+
+#define UB960_SR_FPD3_PORT_SEL 0x4C
+
+#define UB960_RR_RX_PORT_STS1 0x4D
+#define UB960_RR_RX_PORT_STS1_BCC_CRC_ERROR BIT(5)
+#define UB960_RR_RX_PORT_STS1_LOCK_STS_CHG BIT(4)
+#define UB960_RR_RX_PORT_STS1_BCC_SEQ_ERROR BIT(3)
+#define UB960_RR_RX_PORT_STS1_PARITY_ERROR BIT(2)
+#define UB960_RR_RX_PORT_STS1_PORT_PASS BIT(1)
+#define UB960_RR_RX_PORT_STS1_LOCK_STS BIT(0)
+
+#define UB960_RR_RX_PORT_STS2 0x4E
+#define UB960_RR_RX_PORT_STS2_LINE_LEN_UNSTABLE BIT(7)
+#define UB960_RR_RX_PORT_STS2_LINE_LEN_CHG BIT(6)
+#define UB960_RR_RX_PORT_STS2_FPD3_ENCODE_ERROR BIT(5)
+#define UB960_RR_RX_PORT_STS2_BUFFER_ERROR BIT(4)
+#define UB960_RR_RX_PORT_STS2_CSI_ERROR BIT(3)
+#define UB960_RR_RX_PORT_STS2_FREQ_STABLE BIT(2)
+#define UB960_RR_RX_PORT_STS2_CABLE_FAULT BIT(1)
+#define UB960_RR_RX_PORT_STS2_LINE_CNT_CHG BIT(0)
+
+#define UB960_RR_RX_FREQ_HIGH 0x4F
+#define UB960_RR_RX_FREQ_LOW 0x50
+#define UB960_RR_SENSOR_STS_0 0x51
+#define UB960_RR_SENSOR_STS_1 0x52
+#define UB960_RR_SENSOR_STS_2 0x53
+#define UB960_RR_SENSOR_STS_3 0x54
+#define UB960_RR_RX_PAR_ERR_HI 0x55
+#define UB960_RR_RX_PAR_ERR_LO 0x56
+#define UB960_RR_BIST_ERR_COUNT 0x57
+
+#define UB960_RR_BCC_CONFIG 0x58
+#define UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH BIT(6)
+
+#define UB960_RR_DATAPATH_CTL1 0x59
+#define UB960_RR_DATAPATH_CTL2 0x5A
+#define UB960_RR_SER_ID 0x5B
+#define UB960_RR_SER_ALIAS_ID 0x5C
+
+/* For these two register sets: n < UB960_MAX_PORT_ALIASES */
+#define UB960_RR_SLAVE_ID(n) (0x5D + (n))
+#define UB960_RR_SLAVE_ALIAS(n) (0x65 + (n))
+
+#define UB960_RR_PORT_CONFIG 0x6D
+#define UB960_RR_BC_GPIO_CTL(n) (0x6E + (n)) /* n < 2 */
+#define UB960_RR_RAW10_ID 0x70
+#define UB960_RR_RAW12_ID 0x71
+#define UB960_RR_CSI_VC_MAP 0x72
+#define UB960_RR_LINE_COUNT_HI 0x73
+#define UB960_RR_LINE_COUNT_LO 0x74
+#define UB960_RR_LINE_LEN_1 0x75
+#define UB960_RR_LINE_LEN_0 0x76
+#define UB960_RR_FREQ_DET_CTL 0x77
+#define UB960_RR_MAILBOX_1 0x78
+#define UB960_RR_MAILBOX_2 0x79
+
+#define UB960_RR_CSI_RX_STS 0x7A
+#define UB960_RR_CSI_RX_STS_LENGTH_ERR BIT(3)
+#define UB960_RR_CSI_RX_STS_CKSUM_ERR BIT(2)
+#define UB960_RR_CSI_RX_STS_ECC2_ERR BIT(1)
+#define UB960_RR_CSI_RX_STS_ECC1_ERR BIT(0)
+
+#define UB960_RR_CSI_ERR_COUNTER 0x7B
+#define UB960_RR_PORT_CONFIG2 0x7C
+#define UB960_RR_PORT_CONFIG2_LV_POL_LOW BIT(1)
+#define UB960_RR_PORT_CONFIG2_FV_POL_LOW BIT(0)
+
+#define UB960_RR_PORT_PASS_CTL 0x7D
+#define UB960_RR_SEN_INT_RISE_CTL 0x7E
+#define UB960_RR_SEN_INT_FALL_CTL 0x7F
+
+#define UB960_SR_CSI_FRAME_COUNT_HI(n) (0x90 + 8 * (n))
+#define UB960_SR_CSI_FRAME_COUNT_LO(n) (0x91 + 8 * (n))
+#define UB960_SR_CSI_FRAME_ERR_COUNT_HI(n) (0x92 + 8 * (n))
+#define UB960_SR_CSI_FRAME_ERR_COUNT_LO(n) (0x93 + 8 * (n))
+#define UB960_SR_CSI_LINE_COUNT_HI(n) (0x94 + 8 * (n))
+#define UB960_SR_CSI_LINE_COUNT_LO(n) (0x95 + 8 * (n))
+#define UB960_SR_CSI_LINE_ERR_COUNT_HI(n) (0x96 + 8 * (n))
+#define UB960_SR_CSI_LINE_ERR_COUNT_LO(n) (0x97 + 8 * (n))
+
+#define UB960_XR_REFCLK_FREQ 0xA5 /* UB960 */
+
+#define UB960_RR_VC_ID_MAP(x) (0xa0 + (x)) /* UB9702 */
+
+#define UB960_SR_IND_ACC_CTL 0xB0
+#define UB960_SR_IND_ACC_CTL_IA_AUTO_INC BIT(1)
+
+#define UB960_SR_IND_ACC_ADDR 0xB1
+#define UB960_SR_IND_ACC_DATA 0xB2
+#define UB960_SR_BIST_CONTROL 0xB3
+#define UB960_SR_MODE_IDX_STS 0xB8
+#define UB960_SR_LINK_ERROR_COUNT 0xB9
+#define UB960_SR_FPD3_ENC_CTL 0xBA
+#define UB960_SR_FV_MIN_TIME 0xBC
+#define UB960_SR_GPIO_PD_CTL 0xBE
+
+#define UB960_SR_FPD_RATE_CFG 0xc2 /* UB9702 */
+#define UB960_SR_CSI_PLL_DIV 0xc9 /* UB9702 */
+
+#define UB960_RR_PORT_DEBUG 0xD0
+#define UB960_RR_AEQ_CTL2 0xD2
+#define UB960_RR_AEQ_CTL2_SET_AEQ_FLOOR BIT(2)
+
+#define UB960_RR_AEQ_STATUS 0xD3
+
+#define UB960_RR_AEQ_BYPASS 0xD4
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_SHIFT 5
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_MASK GENMASK(7, 5)
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_SHIFT 1
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_MASK GENMASK(3, 1)
+#define UB960_RR_AEQ_BYPASS_ENABLE BIT(0)
+
+#define UB960_RR_AEQ_MIN_MAX 0xD5
+#define UB960_RR_AEQ_MIN_MAX_AEQ_MAX_SHIFT 4
+#define UB960_RR_AEQ_MIN_MAX_AEQ_FLOOR_SHIFT 0
+
+#define UB960_RR_SFILTER_STS_0 0xD6
+#define UB960_RR_SFILTER_STS_1 0xD7
+#define UB960_RR_PORT_ICR_HI 0xD8
+#define UB960_RR_PORT_ICR_LO 0xD9
+#define UB960_RR_PORT_ISR_HI 0xDA
+#define UB960_RR_PORT_ISR_LO 0xDB
+#define UB960_RR_FC_GPIO_STS 0xDC
+#define UB960_RR_FC_GPIO_ICR 0xDD
+#define UB960_RR_SEN_INT_RISE_STS 0xDE
+#define UB960_RR_SEN_INT_FALL_STS 0xDF
+
+#define UB960_RR_CHANNEL_MODE 0xe4 /* UB9702 */
+
+#define UB960_SR_FPD3_RX_ID(n) (0xF0 + (n))
+
+#define UB960_SR_I2C_RX_ID(n) (0xF8 + (n)) /* < UB960_FPD_RX_NPORTS */
+
+/* Indirect register blocks */
+#define UB960_IND_TARGET_PAT_GEN 0x00
+#define UB960_IND_TARGET_RX_ANA(n) (0x01 + (n))
+#define UB960_IND_TARGET_CSI_CSIPLL_REG_1 0x92 /* UB9702 */
+#define UB960_IND_TARGET_CSI_ANA 0x07
+
+/* UB960_IR_PGEN_*: Indirect Registers for Test Pattern Generator */
+
+#define UB960_IR_PGEN_CTL 0x01
+#define UB960_IR_PGEN_CTL_PGEN_ENABLE BIT(0)
+
+#define UB960_IR_PGEN_CFG 0x02
+#define UB960_IR_PGEN_CSI_DI 0x03
+#define UB960_IR_PGEN_LINE_SIZE1 0x04
+#define UB960_IR_PGEN_LINE_SIZE0 0x05
+#define UB960_IR_PGEN_BAR_SIZE1 0x06
+#define UB960_IR_PGEN_BAR_SIZE0 0x07
+#define UB960_IR_PGEN_ACT_LPF1 0x08
+#define UB960_IR_PGEN_ACT_LPF0 0x09
+#define UB960_IR_PGEN_TOT_LPF1 0x0A
+#define UB960_IR_PGEN_TOT_LPF0 0x0B
+#define UB960_IR_PGEN_LINE_PD1 0x0C
+#define UB960_IR_PGEN_LINE_PD0 0x0D
+#define UB960_IR_PGEN_VBP 0x0E
+#define UB960_IR_PGEN_VFP 0x0F
+#define UB960_IR_PGEN_COLOR(n) (0x10 + (n)) /* n < 15 */
+
+#define UB960_IR_RX_ANA_STROBE_SET_CLK 0x08
+#define UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY BIT(3)
+#define UB960_IR_RX_ANA_STROBE_SET_CLK_DELAY_MASK GENMASK(2, 0)
+
+#define UB960_IR_RX_ANA_STROBE_SET_DATA 0x09
+#define UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY BIT(3)
+#define UB960_IR_RX_ANA_STROBE_SET_DATA_DELAY_MASK GENMASK(2, 0)
+
+/* EQ related */
+
+#define UB960_MIN_AEQ_STROBE_POS -7
+#define UB960_MAX_AEQ_STROBE_POS 7
+
+#define UB960_MIN_MANUAL_STROBE_POS -(7 + 6)
+#define UB960_MAX_MANUAL_STROBE_POS (7 + 6)
+#define UB960_NUM_MANUAL_STROBE_POS (UB960_MAX_MANUAL_STROBE_POS - UB960_MIN_MANUAL_STROBE_POS + 1)
+
+#define UB960_MIN_EQ_LEVEL 0
+#define UB960_MAX_EQ_LEVEL 14
+#define UB960_NUM_EQ_LEVELS (UB960_MAX_EQ_LEVEL - UB960_MIN_EQ_LEVEL + 1)
+
+struct ub960_hw_data {
+ const char *model;
+ u8 num_rxports;
+ u8 num_txports;
+ bool ub9702;
+ bool fpdlink4;
+};
+
+enum ub960_rxport_mode {
+ RXPORT_MODE_RAW10 = 0,
+ RXPORT_MODE_RAW12_HF = 1,
+ RXPORT_MODE_RAW12_LF = 2,
+ RXPORT_MODE_CSI2_SYNC = 3,
+ RXPORT_MODE_CSI2_ASYNC = 4,
+ RXPORT_MODE_LAST = RXPORT_MODE_CSI2_ASYNC,
+};
+
+enum ub960_rxport_cdr {
+ RXPORT_CDR_FPD3 = 0,
+ RXPORT_CDR_FPD4 = 1,
+ RXPORT_CDR_LAST = RXPORT_CDR_FPD4,
+};
+
+struct ub960_rxport {
+ struct ub960_data *priv;
+ u8 nport; /* RX port number, and index in priv->rxport[] */
+
+ struct v4l2_subdev *sd; /* Connected subdev */
+ struct fwnode_handle *fwnode;
+
+ enum ub960_rxport_mode rx_mode;
+ enum ub960_rxport_cdr cdr_mode;
+
+ struct device_node *remote_of_node; /* 'serializer' OF node */
+ struct i2c_client *ser_client; /* Serializer */
+ unsigned short ser_alias; /* Serializer i2c alias (lower 7 bits) */
+
+ u8 lv_fv_pol; /* LV and FV polarities */
+
+ struct regulator *vpoc;
+
+ /* EQ settings */
+ struct {
+ bool manual_eq;
+
+ s8 strobe_pos;
+
+ union {
+ struct {
+ u8 eq_level_min;
+ u8 eq_level_max;
+ } aeq;
+
+ struct {
+ u8 eq_level;
+ } manual;
+ };
+ } eq;
+
+ struct ds90ub9xx_platform_data ser_platform_data;
+};
+
+struct ub960_asd {
+ struct v4l2_async_subdev base;
+ struct ub960_rxport *rxport;
+};
+
+static inline struct ub960_asd *to_ub960_asd(struct v4l2_async_subdev *asd)
+{
+ return container_of(asd, struct ub960_asd, base);
+}
+
+struct ub960_txport {
+ struct ub960_data *priv;
+ u8 nport; /* TX port number, and index in priv->txport[] */
+
+ u32 num_data_lanes;
+};
+
+struct atr_alias_table_entry {
+ u16 alias_id; /* Alias ID from DT */
+
+ bool reserved;
+ u8 nport;
+ u8 slave_id; /* i2c client's local i2c address */
+ u8 port_reg_idx;
+};
+
+struct atr_alias_table {
+ /* Protects fields in this struct */
+ struct mutex lock;
+
+ size_t num_entries;
+ struct atr_alias_table_entry *entries;
+};
+
+struct ub960_data {
+ const struct ub960_hw_data *hw_data;
+ struct i2c_client *client; /* for shared local registers */
+ struct regmap *regmap;
+
+ /* lock for register access */
+ struct mutex reg_lock;
+
+ struct clk *refclk;
+
+ struct regulator *vddio;
+
+ struct gpio_desc *pd_gpio;
+ struct delayed_work poll_work;
+ struct i2c_atr *atr;
+ struct ub960_rxport *rxports[UB960_MAX_RX_NPORTS];
+ struct ub960_txport *txports[UB960_MAX_TX_NPORTS];
+
+ struct v4l2_subdev sd;
+ struct media_pad pads[UB960_MAX_NPORTS];
+
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct v4l2_async_notifier notifier;
+
+ u32 tx_data_rate; /* Nominal data rate (Gb/s) */
+ s64 tx_link_freq[1];
+
+ struct atr_alias_table atr_alias_table;
+
+ u8 current_read_rxport;
+ u8 current_write_rxport_mask;
+
+ u8 current_read_csiport;
+ u8 current_write_csiport_mask;
+
+ u8 current_indirect_target;
+
+ bool streaming;
+
+ u8 stored_fwd_ctl;
+
+ u64 stream_enable_mask[UB960_MAX_NPORTS];
+
+ /* These are common to all ports */
+ struct {
+ bool manual;
+
+ s8 min;
+ s8 max;
+ } strobe;
+};
+
+static void ub960_reset(struct ub960_data *priv, bool reset_regs);
+
+static inline struct ub960_data *sd_to_ub960(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct ub960_data, sd);
+}
+
+enum {
+ TEST_PATTERN_DISABLED = 0,
+ TEST_PATTERN_V_COLOR_BARS_1,
+ TEST_PATTERN_V_COLOR_BARS_2,
+ TEST_PATTERN_V_COLOR_BARS_4,
+ TEST_PATTERN_V_COLOR_BARS_8,
+};
+
+static const char * const ub960_tpg_qmenu[] = {
+ "Disabled",
+ "1 vertical color bar",
+ "2 vertical color bars",
+ "4 vertical color bars",
+ "8 vertical color bars",
+};
+
+static inline bool ub960_pad_is_sink(struct ub960_data *priv, u32 pad)
+{
+ return pad < priv->hw_data->num_rxports;
+}
+
+static inline bool ub960_pad_is_source(struct ub960_data *priv, u32 pad)
+{
+ return pad >= priv->hw_data->num_rxports &&
+ pad < (priv->hw_data->num_rxports + priv->hw_data->num_txports);
+}
+
+static inline unsigned int ub960_pad_to_port(struct ub960_data *priv, u32 pad)
+{
+ if (ub960_pad_is_sink(priv, pad))
+ return pad;
+ else
+ return pad - priv->hw_data->num_rxports;
+}
+
+struct ub960_format_info {
+ u32 code;
+ u32 bpp;
+ u8 datatype;
+ bool meta;
+};
+
+static const struct ub960_format_info ub960_formats[] = {
+ { .code = MEDIA_BUS_FMT_YUYV8_1X16, .bpp = 16, .datatype = 0x1e, },
+ { .code = MEDIA_BUS_FMT_UYVY8_1X16, .bpp = 16, .datatype = 0x1e, },
+ { .code = MEDIA_BUS_FMT_VYUY8_1X16, .bpp = 16, .datatype = 0x1e, },
+ { .code = MEDIA_BUS_FMT_YVYU8_1X16, .bpp = 16, .datatype = 0x1e, },
+
+ /* Legacy */
+ { .code = MEDIA_BUS_FMT_YUYV8_2X8, .bpp = 16, .datatype = 0x1e, },
+ { .code = MEDIA_BUS_FMT_UYVY8_2X8, .bpp = 16, .datatype = 0x1e, },
+ { .code = MEDIA_BUS_FMT_VYUY8_2X8, .bpp = 16, .datatype = 0x1e, },
+ { .code = MEDIA_BUS_FMT_YVYU8_2X8, .bpp = 16, .datatype = 0x1e, },
+
+ /* RAW */
+ { .code = MEDIA_BUS_FMT_SBGGR12_1X12, .bpp = 12, .datatype = 0x2c, },
+ { .code = MEDIA_BUS_FMT_SRGGB12_1X12, .bpp = 12, .datatype = 0x2c, },
+};
+
+static const struct ub960_format_info *ub960_find_format(u32 code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(ub960_formats); ++i) {
+ if (ub960_formats[i].code == code)
+ return &ub960_formats[i];
+ }
+
+ return NULL;
+}
+
+/* -----------------------------------------------------------------------------
+ * Basic device access
+ */
+
+static int ub960_read(struct ub960_data *priv, u8 reg, u8 *val)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_read(priv->regmap, reg, &v);
+ if (ret)
+ dev_err(dev, "%s: cannot read register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+ else
+ *val = v;
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_write(struct ub960_data *priv, u8 reg, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_write(priv->regmap, reg, val);
+ if (ret)
+ dev_err(dev, "%s: cannot write register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_update_bits(struct ub960_data *priv, u8 reg, u8 mask, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_update_bits(priv->regmap, reg, mask, val);
+ if (ret)
+ dev_err(dev, "%s: cannot update register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int _ub960_rxport_select(struct ub960_data *priv, u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ if (priv->current_read_rxport == nport &&
+ priv->current_write_rxport_mask == BIT(nport))
+ return 0;
+
+ ret = regmap_write(priv->regmap, UB960_SR_FPD3_PORT_SEL,
+ (nport << 4) | (1 << nport));
+ if (ret) {
+ dev_err(dev, "%s: cannot select rxport %d (%d)!\n", __func__,
+ nport, ret);
+ return ret;
+ }
+
+ priv->current_read_rxport = nport;
+ priv->current_write_rxport_mask = BIT(nport);
+
+ return 0;
+}
+
+static int ub960_rxport_read(struct ub960_data *priv, u8 nport, u8 reg, u8 *val)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ _ub960_rxport_select(priv, nport);
+
+ ret = regmap_read(priv->regmap, reg, &v);
+ if (ret)
+ dev_err(dev, "%s: cannot read register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+ else
+ *val = v;
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_rxport_write(struct ub960_data *priv, u8 nport, u8 reg, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ _ub960_rxport_select(priv, nport);
+
+ ret = regmap_write(priv->regmap, reg, val);
+ if (ret)
+ dev_err(dev, "%s: cannot write register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_rxport_update_bits(struct ub960_data *priv, u8 nport, u8 reg,
+ u8 mask, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ _ub960_rxport_select(priv, nport);
+
+ ret = regmap_update_bits(priv->regmap, reg, mask, val);
+
+ if (ret)
+ dev_err(dev, "%s: cannot update register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int _ub960_csiport_select(struct ub960_data *priv, u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ if (priv->current_read_csiport == nport &&
+ priv->current_write_csiport_mask == BIT(nport))
+ return 0;
+
+ ret = regmap_write(priv->regmap, UB960_SR_CSI_PORT_SEL,
+ (nport << 4) | (1 << nport));
+ if (ret) {
+ dev_err(dev, "%s: cannot select csi port %d (%d)!\n", __func__,
+ nport, ret);
+ return ret;
+ }
+
+ priv->current_read_csiport = nport;
+ priv->current_write_csiport_mask = BIT(nport);
+
+ return 0;
+}
+
+static int ub960_csiport_read(struct ub960_data *priv, u8 nport, u8 reg,
+ u8 *val)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ _ub960_csiport_select(priv, nport);
+
+ ret = regmap_read(priv->regmap, reg, &v);
+ if (ret)
+ dev_err(dev, "%s: cannot read register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+ else
+ *val = v;
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_csiport_write(struct ub960_data *priv, u8 nport, u8 reg,
+ u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ _ub960_csiport_select(priv, nport);
+
+ ret = regmap_write(priv->regmap, reg, val);
+ if (ret)
+ dev_err(dev, "%s: cannot write register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_csiport_update_bits(struct ub960_data *priv, u8 nport, u8 reg,
+ u8 mask, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ _ub960_csiport_select(priv, nport);
+
+ ret = regmap_update_bits(priv->regmap, reg, mask, val);
+
+ if (ret)
+ dev_err(dev, "%s: cannot update register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int _ub960_select_ind_reg_block(struct ub960_data *priv, u8 block)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ if (priv->current_indirect_target == block)
+ return 0;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_CTL, block << 2);
+ if (ret) {
+ dev_err(dev, "%s: cannot select indirect target %u (%d)!\n",
+ __func__, block, ret);
+ return ret;
+ }
+
+ priv->current_indirect_target = block;
+
+ return 0;
+}
+
+static int ub960_read_ind(struct ub960_data *priv, u8 block, u8 reg, u8 *val)
+{
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = _ub960_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_ADDR, reg);
+ if (ret)
+ goto out;
+
+ ret = regmap_read(priv->regmap, UB960_SR_IND_ACC_DATA, &v);
+ if (ret)
+ goto out;
+
+ *val = v;
+
+out:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_write_ind(struct ub960_data *priv, u8 block, u8 reg, u8 val)
+{
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = _ub960_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_ADDR, reg);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_DATA, val);
+
+out:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_write_ind16(struct ub960_data *priv, u8 block, u8 reg, u16 val)
+{
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = _ub960_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_ADDR, reg);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_DATA, val >> 8);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_ADDR, reg + 1);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_DATA, val & 0xff);
+ if (ret)
+ goto out;
+
+out:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_ind_update_bits(struct ub960_data *priv, u8 block, u8 reg,
+ u8 mask, u8 val)
+{
+ int ret;
+ u32 v;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = _ub960_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_ADDR, reg);
+ if (ret)
+ goto out;
+
+ ret = regmap_read(priv->regmap, UB960_SR_IND_ACC_DATA, &v);
+ if (ret)
+ goto out;
+
+ v &= ~mask;
+ v |= val;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_DATA, v);
+
+out:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * I2C-ATR (address translator)
+ */
+
+static int ub960_atr_attach_client(struct i2c_atr *atr, u32 chan_id,
+ const struct i2c_board_info *info,
+ const struct i2c_client *client,
+ u16 *alias_id)
+{
+ struct ub960_data *priv = i2c_atr_get_driver_data(atr);
+ struct ub960_rxport *rxport = priv->rxports[chan_id];
+ struct device *dev = &priv->client->dev;
+ struct atr_alias_table_entry *entry = NULL;
+ unsigned int reg_idx;
+ unsigned int pool_idx;
+ u16 alias;
+ int ret = 0;
+ u8 port_reg_idx_mask = 0;
+
+ dev_dbg(dev, "rx%d: %s\n", chan_id, __func__);
+
+ mutex_lock(&priv->atr_alias_table.lock);
+
+ /*
+ * Go through the alias table and:
+ * 1. Look for an unreserved entry
+ * 2. Construct a bitmask of port's used alias entries
+ */
+
+ for (pool_idx = 0; pool_idx < priv->atr_alias_table.num_entries; pool_idx++) {
+ struct atr_alias_table_entry *e;
+
+ e = &priv->atr_alias_table.entries[pool_idx];
+
+ if (!entry && !e->reserved)
+ entry = e;
+
+ if (e->reserved && e->nport == rxport->nport)
+ port_reg_idx_mask |= BIT(e->port_reg_idx);
+ }
+
+ if (!entry) {
+ dev_err(dev, "rx%d: alias pool exhausted\n", rxport->nport);
+ ret = -EADDRNOTAVAIL;
+ goto out;
+ }
+
+ if (port_reg_idx_mask == (1 << UB960_MAX_PORT_ALIASES) - 1) {
+ dev_err(dev, "rx%d: all aliases in use\n", rxport->nport);
+ ret = -EADDRNOTAVAIL;
+ goto out;
+ }
+
+ alias = entry->alias_id;
+
+ reg_idx = ffz(port_reg_idx_mask);
+
+ entry->reserved = true;
+ entry->nport = rxport->nport;
+ entry->slave_id = client->addr;
+ entry->port_reg_idx = reg_idx;
+
+ /* Map alias to slave */
+
+ ub960_rxport_write(priv, chan_id, UB960_RR_SLAVE_ID(reg_idx),
+ client->addr << 1);
+ ub960_rxport_write(priv, chan_id, UB960_RR_SLAVE_ALIAS(reg_idx),
+ alias << 1);
+
+ *alias_id = alias; /* tell the atr which alias we chose */
+
+ dev_dbg(dev, "rx%d: client 0x%02x mapped at alias 0x%02x (%s)\n",
+ rxport->nport, client->addr, alias, client->name);
+
+out:
+ mutex_unlock(&priv->atr_alias_table.lock);
+ return ret;
+}
+
+static void ub960_atr_detach_client(struct i2c_atr *atr, u32 chan_id,
+ const struct i2c_client *client)
+{
+ struct ub960_data *priv = i2c_atr_get_driver_data(atr);
+ struct ub960_rxport *rxport = priv->rxports[chan_id];
+ struct device *dev = &priv->client->dev;
+ struct atr_alias_table_entry *entry;
+ unsigned int reg_idx;
+ unsigned int pool_idx;
+ u16 alias = 0;
+
+ dev_dbg(dev, "rx%d: %s\n", chan_id, __func__);
+
+ mutex_lock(&priv->atr_alias_table.lock);
+
+ /* Find alias mapped to this client */
+
+ for (pool_idx = 0; pool_idx < priv->atr_alias_table.num_entries; pool_idx++) {
+ entry = &priv->atr_alias_table.entries[pool_idx];
+
+ if (entry->reserved && entry->nport == rxport->nport &&
+ entry->slave_id == client->addr)
+ break;
+ }
+
+ if (pool_idx == priv->atr_alias_table.num_entries) {
+ dev_err(dev, "rx%d: client 0x%02x is not mapped!\n",
+ rxport->nport, client->addr);
+ goto out;
+ }
+
+ alias = entry->alias_id;
+
+ reg_idx = entry->port_reg_idx;
+
+ /* Unmap */
+
+ ub960_rxport_write(priv, chan_id, UB960_RR_SLAVE_ALIAS(reg_idx), 0);
+
+ entry->reserved = false;
+
+ dev_dbg(dev, "rx%d: client 0x%02x unmapped from alias 0x%02x (%s)\n",
+ rxport->nport, client->addr, alias, client->name);
+
+out:
+ mutex_unlock(&priv->atr_alias_table.lock);
+}
+
+static const struct i2c_atr_ops ub960_atr_ops = {
+ .attach_client = ub960_atr_attach_client,
+ .detach_client = ub960_atr_detach_client,
+};
+
+/* -----------------------------------------------------------------------------
+ * CSI ports
+ */
+
+static int ub960_parse_dt_txport(struct ub960_data *priv,
+ const struct device_node *np, u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ struct ub960_txport *txport;
+ int ret;
+ u64 freq;
+
+ if (priv->txports[nport]) {
+ dev_err(dev, "OF: %s: duplicate tx port\n",
+ of_node_full_name(np));
+ return -EADDRINUSE;
+ }
+
+ txport = kzalloc(sizeof(*txport), GFP_KERNEL);
+ if (!txport)
+ return -ENOMEM;
+
+ txport->priv = priv;
+ txport->nport = nport;
+
+ priv->txports[nport] = txport;
+
+ ret = of_property_count_u32_elems(np, "data-lanes");
+
+ if (ret <= 0) {
+ dev_err(dev, "OF: %s: failed to parse data-lanes: %d\n",
+ of_node_full_name(np), ret);
+ goto err_free_txport;
+ }
+
+ txport->num_data_lanes = ret;
+
+ ret = of_property_count_u64_elems(np, "link-frequencies");
+ if (ret < 0) {
+ dev_err(dev, "OF: %s: failed to parse link-frequencies: %d\n",
+ of_node_full_name(np), ret);
+ goto err_free_txport;
+ }
+
+ if (ret != 1) {
+ dev_err(dev, "OF: %s: link-frequencies must contain a single frequency: %d\n",
+ of_node_full_name(np), ret);
+ goto err_free_txport;
+ }
+
+ ret = of_property_read_u64(np, "link-frequencies", &freq);
+ if (ret) {
+ dev_err(dev, "OF: %s: failed to read link frequency: %d\n",
+ of_node_full_name(np), ret);
+ goto err_free_txport;
+ }
+
+ if (of_property_read_u32(np, "link-frequencies", &priv->tx_data_rate) != 0) {
+ dev_err(dev, "OF: %s: missing \"data-rate\" node\n",
+ of_node_full_name(np));
+ return -EINVAL;
+ }
+
+ priv->tx_link_freq[0] = freq;
+ priv->tx_data_rate = freq * 2;
+
+ if (priv->tx_data_rate != 1600000000 &&
+ priv->tx_data_rate != 1200000000 &&
+ priv->tx_data_rate != 800000000 &&
+ priv->tx_data_rate != 400000000) {
+ dev_err(dev, "OF: %s: invalid \"link-frequencies\" value\n",
+ of_node_full_name(np));
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "Nominal data rate: %u", priv->tx_data_rate);
+
+ return 0;
+
+err_free_txport:
+ kfree(txport);
+
+ return ret;
+}
+
+static void ub960_csi_handle_events(struct ub960_data *priv, u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ u8 csi_tx_isr;
+ int ret;
+
+ ret = ub960_csiport_read(priv, nport, UB960_TR_CSI_TX_ISR, &csi_tx_isr);
+
+ if (!ret) {
+ if (csi_tx_isr & UB960_TR_CSI_TX_ISR_IS_CSI_SYNC_ERROR)
+ dev_warn(dev, "TX%u: CSI_SYNC_ERROR\n", nport);
+
+ if (csi_tx_isr & UB960_TR_CSI_TX_ISR_IS_CSI_PASS_ERROR)
+ dev_warn(dev, "TX%u: CSI_PASS_ERROR\n", nport);
+ }
+}
+
+/* -----------------------------------------------------------------------------
+ * RX ports
+ */
+
+static int ub960_rxport_enable_vpocs(struct ub960_data *priv)
+{
+ unsigned int nport;
+ int ret;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport || !rxport->vpoc)
+ continue;
+
+ ret = regulator_enable(rxport->vpoc);
+ if (ret)
+ goto err_disable_vpocs;
+ }
+
+ return 0;
+
+err_disable_vpocs:
+ for (; nport > 0; --nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport - 1];
+
+ if (!rxport || !rxport->vpoc)
+ continue;
+
+ regulator_disable(rxport->vpoc);
+ }
+
+ return ret;
+}
+
+static void ub960_rxport_disable_vpocs(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport || !rxport->vpoc)
+ continue;
+
+ regulator_disable(rxport->vpoc);
+ }
+}
+
+static void ub960_rxport_clear_errors(struct ub960_data *priv,
+ unsigned int nport)
+{
+ u8 v;
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS1, &v);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS2, &v);
+ ub960_rxport_read(priv, nport, UB960_RR_CSI_RX_STS, &v);
+ ub960_rxport_read(priv, nport, UB960_RR_BCC_STATUS, &v);
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_HI, &v);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_LO, &v);
+
+ ub960_rxport_read(priv, nport, UB960_RR_CSI_ERR_COUNTER, &v);
+}
+
+static void ub960_clear_rx_errors(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport)
+ ub960_rxport_clear_errors(priv, nport);
+}
+
+static int ub960_rxport_get_strobe_pos(struct ub960_data *priv,
+ unsigned int nport, s8 *strobe_pos)
+{
+ u8 v;
+ u8 clk_delay, data_delay;
+ int ret;
+
+ ub960_read_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
+ UB960_IR_RX_ANA_STROBE_SET_CLK, &v);
+
+ clk_delay = v & UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY ? 0 : 6;
+
+ ub960_read_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
+ UB960_IR_RX_ANA_STROBE_SET_DATA, &v);
+
+ data_delay = v & UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY ? 0 : 6;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_SFILTER_STS_0, &v);
+ if (ret)
+ return ret;
+
+ clk_delay += v & UB960_IR_RX_ANA_STROBE_SET_CLK_DELAY_MASK;
+
+ ub960_rxport_read(priv, nport, UB960_RR_SFILTER_STS_1, &v);
+ if (ret)
+ return ret;
+
+ data_delay += v & UB960_IR_RX_ANA_STROBE_SET_DATA_DELAY_MASK;
+
+ *strobe_pos = data_delay - clk_delay;
+
+ return 0;
+}
+
+static void ub960_rxport_set_strobe_pos(struct ub960_data *priv,
+ unsigned int nport, s8 strobe_pos)
+{
+ u8 clk_delay, data_delay;
+
+ if (WARN_ON(strobe_pos < UB960_MIN_MANUAL_STROBE_POS ||
+ strobe_pos > UB960_MAX_MANUAL_STROBE_POS))
+ return;
+
+ clk_delay = UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY;
+ data_delay = UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY;
+
+ if (strobe_pos < -7)
+ clk_delay = abs(strobe_pos) - 6;
+ else if (strobe_pos > 7)
+ data_delay = strobe_pos - 6;
+ else if (strobe_pos < 0)
+ clk_delay = abs(strobe_pos) | UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY;
+ else if (strobe_pos > 0)
+ data_delay = strobe_pos | UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY;
+
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
+ UB960_IR_RX_ANA_STROBE_SET_CLK, clk_delay);
+
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
+ UB960_IR_RX_ANA_STROBE_SET_DATA, data_delay);
+}
+
+static void ub960_rxport_set_strobe_range(struct ub960_data *priv,
+ s8 strobe_min, s8 strobe_max)
+{
+ WARN_ON(strobe_min < UB960_MIN_AEQ_STROBE_POS);
+ WARN_ON(strobe_max > UB960_MAX_AEQ_STROBE_POS);
+
+ strobe_min += 7;
+ strobe_max += 7;
+
+ ub960_write(priv, UB960_XR_SFILTER_CFG,
+ ((u8)strobe_min << UB960_XR_SFILTER_CFG_SFILTER_MIN_SHIFT) |
+ ((u8)strobe_max << UB960_XR_SFILTER_CFG_SFILTER_MAX_SHIFT));
+}
+
+static int ub960_rxport_get_eq_level(struct ub960_data *priv,
+ unsigned int nport, u8 *eq_level)
+{
+ int ret;
+ u8 v;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_AEQ_STATUS, &v);
+ if (ret)
+ return ret;
+
+ *eq_level = (v & 0x7) + ((v >> 3) & 0x7);
+
+ return 0;
+}
+
+static void ub960_rxport_set_eq_level(struct ub960_data *priv,
+ unsigned int nport, u8 eq_level)
+{
+ u8 eq_stage_1_select_value, eq_stage_2_select_value;
+ u8 v;
+
+ if (eq_level <= 7) {
+ eq_stage_1_select_value = eq_level;
+ eq_stage_2_select_value = 0;
+ } else {
+ eq_stage_1_select_value = 7;
+ eq_stage_2_select_value = eq_level - 7;
+ }
+
+ WARN_ON(eq_stage_1_select_value > 7);
+ WARN_ON(eq_stage_2_select_value > 7);
+
+ ub960_rxport_read(priv, nport, UB960_RR_AEQ_BYPASS, &v);
+
+ v &= ~(UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_MASK |
+ UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_MASK);
+ v |= eq_stage_1_select_value << UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_SHIFT;
+ v |= eq_stage_2_select_value << UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_SHIFT;
+ v |= UB960_RR_AEQ_BYPASS_ENABLE; /* Enable AEQ Bypass */
+
+ ub960_rxport_write(priv, nport, UB960_RR_AEQ_BYPASS, v);
+}
+
+static void ub960_rxport_set_eq_range(struct ub960_data *priv,
+ unsigned int nport, u8 eq_min, u8 eq_max)
+{
+ ub960_rxport_write(priv, nport, UB960_RR_AEQ_MIN_MAX,
+ (eq_min << UB960_RR_AEQ_MIN_MAX_AEQ_FLOOR_SHIFT) |
+ (eq_max << UB960_RR_AEQ_MIN_MAX_AEQ_MAX_SHIFT));
+
+ /* Enable AEQ min setting */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_CTL2,
+ UB960_RR_AEQ_CTL2_SET_AEQ_FLOOR,
+ UB960_RR_AEQ_CTL2_SET_AEQ_FLOOR);
+}
+
+static void ub960_rxport_config_eq(struct ub960_data *priv, unsigned int nport)
+{
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ /* We also set common settings here. Should be moved elsewhere. */
+
+ if (priv->strobe.manual) {
+ /* Disable AEQ_SFILTER_EN */
+ ub960_update_bits(priv, UB960_XR_AEQ_CTL1,
+ UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN, 0);
+ } else {
+ /* Enable SFILTER and error control */
+ ub960_write(priv, UB960_XR_AEQ_CTL1,
+ (0x7 << UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_SHIFT) |
+ UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN);
+
+ /* Set AEQ strobe range */
+ ub960_rxport_set_strobe_range(priv, priv->strobe.min,
+ priv->strobe.max);
+ }
+
+ /* The rest are port specific */
+
+ if (priv->strobe.manual)
+ ub960_rxport_set_strobe_pos(priv, nport, rxport->eq.strobe_pos);
+ else
+ ub960_rxport_set_strobe_pos(priv, nport, 0);
+
+ if (rxport->eq.manual_eq) {
+ ub960_rxport_set_eq_level(priv, nport,
+ rxport->eq.manual.eq_level);
+
+ /* Enable AEQ Bypass */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_BYPASS,
+ UB960_RR_AEQ_BYPASS_ENABLE,
+ UB960_RR_AEQ_BYPASS_ENABLE);
+ } else {
+ ub960_rxport_set_eq_range(priv, nport,
+ rxport->eq.aeq.eq_level_min,
+ rxport->eq.aeq.eq_level_max);
+
+ /* Disable AEQ Bypass */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_BYPASS,
+ UB960_RR_AEQ_BYPASS_ENABLE, 0);
+ }
+}
+
+static int ub960_rxport_link_ok(struct ub960_data *priv, unsigned int nport,
+ bool *ok)
+{
+ u8 rx_port_sts1, rx_port_sts2;
+ unsigned int parity_errors;
+ u8 csi_rx_sts;
+ u8 csi_err_cnt;
+ u8 v1, v2;
+ u8 bcc_sts;
+ int ret;
+ bool errors;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS1,
+ &rx_port_sts1);
+ if (ret)
+ return ret;
+
+ if (!(rx_port_sts1 & UB960_RR_RX_PORT_STS1_LOCK_STS)) {
+ *ok = false;
+ return 0;
+ }
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS2,
+ &rx_port_sts2);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_CSI_RX_STS, &csi_rx_sts);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_CSI_ERR_COUNTER,
+ &csi_err_cnt);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_BCC_STATUS, &bcc_sts);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_HI, &v1);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_LO, &v2);
+ if (ret)
+ return ret;
+
+ parity_errors = (v1 << 8) | v2;
+
+ errors = (rx_port_sts1 & 0x2c) || (rx_port_sts2 & 0x20) ||
+ (bcc_sts & 0x3f) || (csi_rx_sts & 0xf) || csi_err_cnt ||
+ parity_errors;
+
+ *ok = !errors;
+
+ return 0;
+}
+
+/*
+ * Wait for the RX ports to lock, have no errors and have stable strobe position
+ * and EQ level.
+ */
+static int ub960_rxport_wait_locks(struct ub960_data *priv,
+ unsigned long port_mask,
+ unsigned int *lock_mask)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned long timeout;
+ unsigned int link_ok_mask;
+ unsigned int missing;
+ unsigned int loops;
+ u8 nport;
+ int ret;
+
+ if (port_mask == 0)
+ return 0;
+
+ if (port_mask >= BIT(priv->hw_data->num_rxports))
+ return -EINVAL;
+
+ timeout = jiffies + msecs_to_jiffies(1000);
+ loops = 0;
+ link_ok_mask = 0;
+
+ while (time_before(jiffies, timeout)) {
+ missing = 0;
+
+ for_each_set_bit(nport, &port_mask,
+ priv->hw_data->num_rxports) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ bool ok;
+
+ if (!rxport)
+ continue;
+
+ ret = ub960_rxport_link_ok(priv, nport, &ok);
+ if (ret)
+ return ret;
+
+ if (!ok || !(link_ok_mask & BIT(nport)))
+ missing++;
+
+ if (ok)
+ link_ok_mask |= BIT(nport);
+ else
+ link_ok_mask &= ~BIT(nport);
+ }
+
+ loops++;
+
+ if (missing == 0)
+ break;
+
+ msleep(50);
+ }
+
+ if (lock_mask)
+ *lock_mask = link_ok_mask;
+
+ dev_dbg(dev, "Wait locks done in %u loops\n", loops);
+ for_each_set_bit(nport, &port_mask, priv->hw_data->num_rxports) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ s8 strobe_pos, eq_level;
+ u8 v1, v2;
+
+ if (!rxport)
+ continue;
+
+ if (!(link_ok_mask & BIT(nport))) {
+ dev_dbg(dev, "\trx%u: not locked\n", nport);
+ continue;
+ }
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_FREQ_HIGH, &v1);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_FREQ_LOW, &v2);
+
+ ret = ub960_rxport_get_strobe_pos(priv, nport, &strobe_pos);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_get_eq_level(priv, nport, &eq_level);
+ if (ret)
+ return ret;
+
+ dev_dbg(dev, "\trx%u: locked, SP: %d, EQ: %u, freq %u Hz\n",
+ nport, strobe_pos, eq_level,
+ v1 * 1000000 + v2 * 1000000 / 256);
+ }
+
+ return 0;
+}
+
+static int ub960_init_atr(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct i2c_adapter *parent_adap = priv->client->adapter;
+
+ priv->atr = i2c_atr_new(parent_adap, dev, &ub960_atr_ops,
+ priv->hw_data->num_rxports);
+ if (IS_ERR(priv->atr))
+ return PTR_ERR(priv->atr);
+
+ i2c_atr_set_driver_data(priv->atr, priv);
+
+ return 0;
+}
+
+static void ub960_uninit_atr(struct ub960_data *priv)
+{
+ i2c_atr_delete(priv->atr);
+ priv->atr = NULL;
+}
+
+static unsigned long ub960_calc_bc_clk_rate_ub960(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int mult;
+ unsigned int div;
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ mult = 1;
+ div = 10;
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ mult = 2;
+ div = 1;
+ break;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ mult = 2;
+ div = 5;
+ break;
+
+ default:
+ WARN_ON(true);
+ return 0;
+ }
+
+ return clk_get_rate(priv->refclk) * mult / div;
+}
+
+static unsigned long ub960_calc_bc_clk_rate_ub9702(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ return 2359400;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ return 47187500;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ return 9437500;
+
+ default:
+ WARN_ON(true);
+ return 0;
+ }
+}
+
+static int ub960_rxport_add_serializer(struct ub960_data *priv, u8 nport)
+{
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ struct device *dev = &priv->client->dev;
+ struct ds90ub9xx_platform_data *ser_pdata = &rxport->ser_platform_data;
+ struct i2c_board_info ser_info = {
+ .of_node = rxport->remote_of_node,
+ .platform_data = ser_pdata,
+ };
+
+ ser_pdata->port = nport;
+ ser_pdata->atr = priv->atr;
+ if (priv->hw_data->ub9702)
+ ser_pdata->bc_rate = ub960_calc_bc_clk_rate_ub9702(priv, rxport);
+ else
+ ser_pdata->bc_rate = ub960_calc_bc_clk_rate_ub960(priv, rxport);
+
+ /*
+ * Adding the serializer under rxport->adap would be cleaner, but it
+ * would need tweaks to bypass the alias table. Adding to the
+ * upstream adapter is way simpler.
+ */
+ ser_info.addr = rxport->ser_alias;
+ rxport->ser_client =
+ i2c_new_client_device(priv->client->adapter, &ser_info);
+ if (!rxport->ser_client) {
+ dev_err(dev, "rx%d: cannot add %s i2c device", nport,
+ ser_info.type);
+ return -EIO;
+ }
+
+ dev_dbg(dev, "rx%d: remote serializer at alias 0x%02x (%u-%04x)\n",
+ nport, rxport->ser_client->addr,
+ rxport->ser_client->adapter->nr, rxport->ser_client->addr);
+
+ return 0;
+}
+
+static void ub960_rxport_remove_serializer(struct ub960_data *priv, u8 nport)
+{
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ i2c_unregister_device(rxport->ser_client);
+ rxport->ser_client = NULL;
+}
+
+/* Add serializer i2c devices for all initialized ports */
+static int ub960_rxport_add_serializers(struct ub960_data *priv)
+{
+ unsigned int nport;
+ int ret;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ ret = ub960_rxport_add_serializer(priv, nport);
+ if (ret)
+ goto err_remove_sers;
+ }
+
+ return 0;
+
+err_remove_sers:
+ for (; nport > 0; --nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport - 1];
+
+ if (!rxport)
+ continue;
+
+ rxport = priv->rxports[nport - 1];
+ if (!rxport)
+ continue;
+
+ ub960_rxport_remove_serializer(priv, nport - 1);
+ }
+
+ return ret;
+}
+
+static void ub960_rxport_remove_serializers(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ ub960_rxport_remove_serializer(priv, nport);
+ }
+}
+
+static void ub960_init_tx_port(struct ub960_data *priv,
+ struct ub960_txport *txport)
+{
+ unsigned int nport = txport->nport;
+ u8 csi_ctl = 0;
+
+ /*
+ * From the datasheet: "initial CSI Skew-Calibration
+ * sequence [...] should be set when operating at 1.6 Gbps"
+ */
+ if (priv->tx_data_rate == 1600000000)
+ csi_ctl |= UB960_TR_CSI_CTL_CSI_CAL_EN;
+
+ csi_ctl |= (4 - txport->num_data_lanes) << 4;
+
+ ub960_csiport_write(priv, nport, UB960_TR_CSI_CTL, csi_ctl);
+}
+
+static int ub960_init_tx_ports(struct ub960_data *priv)
+{
+ unsigned int nport;
+ u8 speed_select;
+ u8 pll_div;
+
+ /* TX ports */
+
+ switch (priv->tx_data_rate) {
+ case 1600000000:
+ default:
+ speed_select = 0;
+ pll_div = 0x10;
+ break;
+ case 1200000000:
+ speed_select = 1;
+ break;
+ case 800000000:
+ speed_select = 2;
+ pll_div = 0x10;
+ break;
+ case 400000000:
+ speed_select = 3;
+ pll_div = 0x10;
+ break;
+ }
+
+ ub960_write(priv, UB960_SR_CSI_PLL_CTL, speed_select);
+
+ if (priv->hw_data->ub9702) {
+ ub960_write(priv, UB960_SR_CSI_PLL_DIV, pll_div);
+
+ switch (priv->tx_data_rate) {
+ case 1600000000:
+ default:
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x92, 0x80);
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x4B, 0x2A);
+ break;
+ case 800000000:
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x92, 0x90);
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x4F, 0x2A);
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x4B, 0x2A);
+ break;
+ case 400000000:
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x92, 0xA0);
+ break;
+ }
+ }
+
+ for (nport = 0; nport < priv->hw_data->num_txports; nport++) {
+ struct ub960_txport *txport = priv->txports[nport];
+
+ if (!txport)
+ continue;
+
+ ub960_init_tx_port(priv, txport);
+ }
+
+ return 0;
+}
+
+static void ub960_init_rx_port_ub960(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+ u32 bc_freq_val;
+
+ /*
+ * Back channel frequency select.
+ * Override FREQ_SELECT from the strap.
+ * 0 - 2.5 Mbps (DS90UB913A-Q1 / DS90UB933-Q1)
+ * 2 - 10 Mbps
+ * 6 - 50 Mbps (DS90UB953-Q1)
+ *
+ * Note that changing this setting will result in some errors on the back
+ * channel for a short period of time.
+ */
+
+ switch (rxport->rx_mode) {
+ default:
+ WARN_ON(true);
+ fallthrough;
+
+ case RXPORT_MODE_RAW10:
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ bc_freq_val = 0;
+ break;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ bc_freq_val = 2;
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ bc_freq_val = 6;
+ break;
+ }
+
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG, 0x7,
+ bc_freq_val);
+
+ switch (rxport->rx_mode) {
+ default:
+ WARN_ON(true);
+ fallthrough;
+
+ case RXPORT_MODE_RAW10:
+ /* FPD3_MODE = RAW10 Mode (DS90UB913A-Q1 / DS90UB933-Q1 compatible) */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG, 0x3,
+ 0x3);
+
+ /*
+ * RAW10_8BIT_CTL = 0b11 : 8-bit processing using lower 8 bits
+ * 0b10 : 8-bit processing using upper 8 bits
+ */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2,
+ 0x3 << 6, 0x2 << 6);
+
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ case RXPORT_MODE_CSI2_ASYNC:
+ /* CSI-2 Mode (DS90UB953-Q1 compatible) */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG, 0x3,
+ 0x0);
+
+ break;
+ }
+
+ /* LV_POLARITY & FV_POLARITY */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2, 0x3,
+ rxport->lv_fv_pol);
+
+ /* Enable all interrupt sources from this port */
+ ub960_rxport_write(priv, nport, UB960_RR_PORT_ICR_HI, 0x07);
+ ub960_rxport_write(priv, nport, UB960_RR_PORT_ICR_LO, 0x7f);
+
+ /* Enable I2C_PASS_THROUGH */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG,
+ UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH,
+ UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH);
+
+ /* Enable I2C communication to the serializer via the alias addr */
+ ub960_rxport_write(priv, nport, UB960_RR_SER_ALIAS_ID,
+ rxport->ser_alias << 1);
+
+ /* Configure EQ related settings */
+ ub960_rxport_config_eq(priv, nport);
+
+ /* Enable RX port */
+ ub960_update_bits(priv, UB960_SR_RX_PORT_CTL, BIT(nport), BIT(nport));
+}
+
+static void ub960_init_rx_port_ub9702_fpd3(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+ u8 bc_freq_val;
+ u8 fpd_func_mode;
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ bc_freq_val = 0;
+ fpd_func_mode = 5;
+ break;
+
+ case RXPORT_MODE_RAW12_HF:
+ bc_freq_val = 0;
+ fpd_func_mode = 4;
+ break;
+
+ case RXPORT_MODE_RAW12_LF:
+ bc_freq_val = 0;
+ fpd_func_mode = 6;
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ bc_freq_val = 6;
+ fpd_func_mode = 2;
+ break;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ bc_freq_val = 2;
+ fpd_func_mode = 2;
+ break;
+
+ default:
+ WARN_ON(true);
+ break;
+ }
+
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG, 0x7,
+ bc_freq_val);
+ ub960_rxport_write(priv, nport, UB960_RR_CHANNEL_MODE, fpd_func_mode);
+
+ /* set serdes_eq_mode = 1 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0xA8, 0x80);
+
+ /* enable serdes driver */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x0D, 0x7F);
+
+ /* set serdes_eq_offset=4 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2B, 0x04);
+
+ /* init default serdes_eq_max in 0xA9 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0xA9, 0x23);
+
+ /* init serdes_eq_min in 0xAA */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0xAA, 0);
+
+ /* serdes_driver_ctl2 control: DS90UB953-Q1/DS90UB933-Q1/DS90UB913A-Q1 */
+ ub960_ind_update_bits(priv, UB960_IND_TARGET_RX_ANA(nport), 0x1b,
+ BIT(3), BIT(3));
+
+ /* RX port to half-rate */
+ ub960_update_bits(priv, UB960_SR_FPD_RATE_CFG, 0x3 << (nport * 2),
+ 1 << (nport * 2));
+}
+
+static void ub960_init_rx_port_ub9702_fpd4_aeq(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+ bool first_time_power_up = true;
+
+ if (first_time_power_up) {
+ u8 v;
+
+ /* AEQ init */
+ ub960_read_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2C, &v);
+
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x27, v);
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x28, v + 1);
+
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2B, 0x00);
+ }
+
+ /* enable serdes_eq_ctl2 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x9E, 0x00);
+
+ /* enable serdes_eq_ctl1 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x90, 0x40);
+
+ /* enable serdes_eq_en */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2E, 0x40);
+
+ /* disable serdes_eq_override */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0xF0, 0x00);
+
+ /* disable serdes_gain_override */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x71, 0x00);
+}
+
+static void ub960_init_rx_port_ub9702_fpd4(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+ u8 bc_freq_val;
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ bc_freq_val = 0;
+ break;
+
+ case RXPORT_MODE_RAW12_HF:
+ bc_freq_val = 0;
+ break;
+
+ case RXPORT_MODE_RAW12_LF:
+ bc_freq_val = 0;
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ bc_freq_val = 6;
+ break;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ bc_freq_val = 2;
+ break;
+
+ default:
+ WARN_ON(true);
+ break;
+ }
+
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG, 0x7,
+ bc_freq_val);
+
+ /* FPD4 Sync Mode */
+ ub960_rxport_write(priv, nport, UB960_RR_CHANNEL_MODE, 0);
+
+ /* add serdes_eq_offset of 4 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2B, 0x04);
+
+ /* FPD4 serdes_start_eq in 0x27: assign default */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x27, 0x0);
+ /* FPD4 serdes_end_eq in 0x28: assign default */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x28, 0x23);
+
+ /* set serdes_driver_mode into FPD IV mode */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x04, 0x00);
+ /* set FPD PBC drv into FPD IV mode */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x1B, 0x00);
+
+ /* set serdes_system_init to 0x2f */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x21, 0x2f);
+ /* set serdes_system_rst in reset mode */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x25, 0xC1);
+
+ /* RX port to 7.55G mode */
+ ub960_update_bits(priv, UB960_SR_FPD_RATE_CFG, 0x3 << (nport * 2),
+ 0 << (nport * 2));
+
+ ub960_init_rx_port_ub9702_fpd4_aeq(priv, rxport);
+}
+
+static void ub960_init_rx_port_ub9702(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+
+ if (rxport->cdr_mode == RXPORT_CDR_FPD3)
+ ub960_init_rx_port_ub9702_fpd3(priv, rxport);
+ else /* RXPORT_CDR_FPD4 */
+ ub960_init_rx_port_ub9702_fpd4(priv, rxport);
+
+ switch (rxport->rx_mode) {
+ default:
+ WARN_ON(true);
+ fallthrough;
+
+ case RXPORT_MODE_RAW10:
+ /*
+ * RAW10_8BIT_CTL = 0b11 : 8-bit processing using lower 8 bits
+ * 0b10 : 8-bit processing using upper 8 bits
+ */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2,
+ 0x3 << 6, 0x2 << 6);
+
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ case RXPORT_MODE_CSI2_ASYNC:
+
+ break;
+ }
+
+ /* LV_POLARITY & FV_POLARITY */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2, 0x3, 0x1);
+
+ /* Enable all interrupt sources from this port */
+ ub960_rxport_write(priv, nport, UB960_RR_PORT_ICR_HI, 0x07);
+ ub960_rxport_write(priv, nport, UB960_RR_PORT_ICR_LO, 0x7f);
+
+ /* Enable I2C_PASS_THROUGH */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG,
+ UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH,
+ UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH);
+
+ /* Enable I2C communication to the serializer via the alias addr */
+ ub960_rxport_write(priv, nport, UB960_RR_SER_ALIAS_ID,
+ rxport->ser_alias << 1);
+
+ /* Enable RX port */
+ ub960_update_bits(priv, UB960_SR_RX_PORT_CTL, BIT(nport), BIT(nport));
+
+ if (rxport->cdr_mode == RXPORT_CDR_FPD4) {
+ /* unreset 960 AEQ */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x25, 0x41);
+ }
+}
+
+static int ub960_init_rx_ports(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ if (priv->hw_data->ub9702)
+ ub960_init_rx_port_ub9702(priv, rxport);
+ else
+ ub960_init_rx_port_ub960(priv, rxport);
+ }
+
+ return 0;
+}
+
+static void ub960_rxport_handle_events(struct ub960_data *priv, u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ u8 rx_port_sts1;
+ u8 rx_port_sts2;
+ u8 csi_rx_sts;
+ u8 bcc_sts;
+ int ret = 0;
+
+ /* Read interrupts (also clears most of them) */
+ if (!ret)
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS1,
+ &rx_port_sts1);
+ if (!ret)
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS2,
+ &rx_port_sts2);
+ if (!ret)
+ ret = ub960_rxport_read(priv, nport, UB960_RR_CSI_RX_STS,
+ &csi_rx_sts);
+ if (!ret)
+ ret = ub960_rxport_read(priv, nport, UB960_RR_BCC_STATUS,
+ &bcc_sts);
+
+ if (ret)
+ return;
+
+ if (rx_port_sts1 & UB960_RR_RX_PORT_STS1_PARITY_ERROR) {
+ u8 v1, v2;
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_HI, &v1);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_LO, &v2);
+ dev_err(dev, "RX%u parity errors: %u\n", nport, (v1 << 8) | v2);
+ }
+
+ if (rx_port_sts1 & UB960_RR_RX_PORT_STS1_BCC_CRC_ERROR)
+ dev_err(dev, "RX%u BCC CRC error\n", nport);
+
+ if (rx_port_sts1 & UB960_RR_RX_PORT_STS1_BCC_SEQ_ERROR)
+ dev_err(dev, "RX%u BCC SEQ error\n", nport);
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_LINE_LEN_UNSTABLE)
+ dev_err(dev, "RX%u line length unstable\n", nport);
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_FPD3_ENCODE_ERROR)
+ dev_err(dev, "RX%u FPD3 encode error\n", nport);
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_BUFFER_ERROR)
+ dev_err(dev, "RX%u buffer error\n", nport);
+
+ if (csi_rx_sts)
+ dev_err(dev, "RX%u CSI error: %#02x\n", nport, csi_rx_sts);
+
+ if (csi_rx_sts & UB960_RR_CSI_RX_STS_ECC1_ERR)
+ dev_err(dev, "RX%u CSI ECC1 error\n", nport);
+
+ if (csi_rx_sts & UB960_RR_CSI_RX_STS_ECC2_ERR)
+ dev_err(dev, "RX%u CSI ECC2 error\n", nport);
+
+ if (csi_rx_sts & UB960_RR_CSI_RX_STS_CKSUM_ERR)
+ dev_err(dev, "RX%u CSI checksum error\n", nport);
+
+ if (csi_rx_sts & UB960_RR_CSI_RX_STS_LENGTH_ERR)
+ dev_err(dev, "RX%u CSI length error\n", nport);
+
+ if (bcc_sts)
+ dev_err(dev, "RX%u BCC error: %#02x\n", nport, bcc_sts);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_RESP_ERR)
+ dev_err(dev, "RX%u BCC response error", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_SLAVE_TO)
+ dev_err(dev, "RX%u BCC slave timeout", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_SLAVE_ERR)
+ dev_err(dev, "RX%u BCC slave error", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_MASTER_TO)
+ dev_err(dev, "RX%u BCC master timeout", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_MASTER_ERR)
+ dev_err(dev, "RX%u BCC master error", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_SEQ_ERROR)
+ dev_err(dev, "RX%u BCC sequence error", nport);
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_LINE_LEN_CHG) {
+ u8 v1, v2;
+
+ ub960_rxport_read(priv, nport, UB960_RR_LINE_LEN_1, &v1);
+ ub960_rxport_read(priv, nport, UB960_RR_LINE_LEN_0, &v2);
+ dev_dbg(dev, "RX%u line len changed: %u\n", nport,
+ (v1 << 8) | v2);
+ }
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_LINE_CNT_CHG) {
+ u8 v1, v2;
+
+ ub960_rxport_read(priv, nport, UB960_RR_LINE_COUNT_HI, &v1);
+ ub960_rxport_read(priv, nport, UB960_RR_LINE_COUNT_LO, &v2);
+ dev_dbg(dev, "RX%u line count changed: %u\n", nport,
+ (v1 << 8) | v2);
+ }
+
+ if (rx_port_sts1 & UB960_RR_RX_PORT_STS1_LOCK_STS_CHG) {
+ dev_dbg(dev, "RX%u: %s, %s, %s, %s\n", nport,
+ (rx_port_sts1 & UB960_RR_RX_PORT_STS1_LOCK_STS) ? "locked" : "unlocked",
+ (rx_port_sts1 & UB960_RR_RX_PORT_STS1_PORT_PASS) ? "passed" : "not passed",
+ (rx_port_sts2 & UB960_RR_RX_PORT_STS2_CABLE_FAULT) ? "no clock" : "clock ok",
+ (rx_port_sts2 & UB960_RR_RX_PORT_STS2_FREQ_STABLE) ? "stable freq" : "unstable freq");
+ }
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2
+ */
+
+static void ub960_get_vc_maps(struct ub960_data *priv,
+ struct v4l2_subdev_state *state, u8 *vc)
+{
+ const struct v4l2_subdev_krouting *routing = &state->routing;
+ u8 cur_vc[UB960_MAX_TX_NPORTS] = { 0 };
+ u8 handled_mask = 0;
+ unsigned int i;
+
+ for (i = 0; i < routing->num_routes; ++i) {
+ struct v4l2_subdev_route *route = &routing->routes[i];
+ unsigned int rx, tx;
+
+ rx = ub960_pad_to_port(priv, route->sink_pad);
+
+ if (BIT(rx) & handled_mask)
+ continue;
+
+ tx = ub960_pad_to_port(priv, route->source_pad);
+
+ vc[rx] = cur_vc[tx]++;
+ handled_mask |= BIT(rx);
+ }
+}
+
+static int ub960_enable_tx_port(struct ub960_data *priv, unsigned int nport)
+{
+ struct device *dev = &priv->client->dev;
+
+ dev_dbg(dev, "enable TX port %u\n", nport);
+
+ ub960_csiport_update_bits(priv, nport, UB960_TR_CSI_CTL,
+ UB960_TR_CSI_CTL_CSI_ENABLE,
+ UB960_TR_CSI_CTL_CSI_ENABLE);
+
+ return 0;
+}
+
+static void ub960_disable_tx_port(struct ub960_data *priv, unsigned int nport)
+{
+ struct device *dev = &priv->client->dev;
+
+ dev_dbg(dev, "disable TX port %u\n", nport);
+
+ ub960_csiport_update_bits(priv, nport, UB960_TR_CSI_CTL,
+ UB960_TR_CSI_CTL_CSI_ENABLE, 0);
+}
+
+static int ub960_enable_rx_port(struct ub960_data *priv, unsigned int nport)
+{
+ struct device *dev = &priv->client->dev;
+
+ dev_dbg(dev, "enable RX port %u\n", nport);
+
+ /* Enable forwarding */
+ ub960_update_bits(priv, UB960_SR_FWD_CTL1, BIT(4 + nport), 0);
+
+ return 0;
+}
+
+static void ub960_disable_rx_port(struct ub960_data *priv, unsigned int nport)
+{
+ struct device *dev = &priv->client->dev;
+
+ dev_dbg(dev, "disable RX port %u\n", nport);
+
+ /* Disable forwarding */
+ ub960_update_bits(priv, UB960_SR_FWD_CTL1, BIT(4 + nport),
+ BIT(4 + nport));
+}
+
+static int ub960_configure_ports_for_streaming(struct ub960_data *priv,
+ struct v4l2_subdev_state *state)
+{
+ const struct v4l2_subdev_krouting *routing = &state->routing;
+ unsigned int i;
+ unsigned int nport;
+ u8 fwd_ctl;
+ struct {
+ u32 num_streams;
+ u8 pixel_dt;
+ u8 meta_dt;
+ u32 meta_lines;
+ u32 tx_port;
+ } rx_data[UB960_MAX_RX_NPORTS] = { 0 };
+ u8 vc_map[UB960_MAX_RX_NPORTS] = { 0 };
+
+ ub960_get_vc_maps(priv, state, vc_map);
+
+ for (i = 0; i < routing->num_routes; ++i) {
+ struct v4l2_subdev_route *route = &routing->routes[i];
+ struct ub960_rxport *rxport;
+ struct ub960_txport *txport;
+ struct v4l2_mbus_framefmt *fmt;
+ const struct ub960_format_info *ub960_fmt;
+ unsigned int nport;
+
+ nport = ub960_pad_to_port(priv, route->sink_pad);
+
+ rxport = priv->rxports[nport];
+ if (!rxport)
+ return -EINVAL;
+
+ txport = priv->txports[ub960_pad_to_port(priv, route->source_pad)];
+ if (!txport)
+ return -EINVAL;
+
+ rx_data[nport].tx_port = ub960_pad_to_port(priv, route->source_pad);
+
+ rx_data[nport].num_streams++;
+
+ /* For the rest, we are only interested in parallel busses */
+ if (rxport->rx_mode == RXPORT_MODE_CSI2_SYNC ||
+ rxport->rx_mode == RXPORT_MODE_CSI2_ASYNC)
+ continue;
+
+ if (rx_data[nport].num_streams > 2)
+ return -EPIPE;
+
+ fmt = v4l2_subdev_state_get_stream_format(state, route->sink_pad,
+ route->sink_stream);
+ if (!fmt)
+ return -EPIPE;
+
+ ub960_fmt = ub960_find_format(fmt->code);
+ if (!ub960_fmt)
+ return -EPIPE;
+
+ if (ub960_fmt->meta) {
+ if (fmt->height > 3) {
+ dev_err(&priv->client->dev,
+ "Unsupported metadata height %u\n",
+ fmt->height);
+ return -EPIPE;
+ }
+
+ rx_data[nport].meta_dt = ub960_fmt->datatype;
+ rx_data[nport].meta_lines = fmt->height;
+ } else {
+ rx_data[nport].pixel_dt = ub960_fmt->datatype;
+ }
+ }
+
+ /* Configure RX ports */
+
+ fwd_ctl = 0;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ u8 vc = vc_map[nport];
+
+ if (rx_data[nport].num_streams == 0)
+ continue;
+
+ switch (rxport->rx_mode) {
+ default:
+ WARN_ON(true);
+ fallthrough;
+
+ case RXPORT_MODE_RAW10:
+ ub960_rxport_write(priv, nport, UB960_RR_RAW10_ID,
+ rx_data[nport].pixel_dt | (vc << 6));
+
+ ub960_rxport_write(priv, rxport->nport,
+ UB960_RR_RAW_EMBED_DTYPE,
+ (rx_data[nport].meta_lines << 6) | rx_data[nport].meta_dt);
+
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ case RXPORT_MODE_CSI2_ASYNC:
+ if (!priv->hw_data->ub9702) {
+ /* Map all VCs from this port to the same VC */
+ ub960_rxport_write(priv, nport, UB960_RR_CSI_VC_MAP,
+ (vc << 6) | (vc << 4) |
+ (vc << 2) | (vc << 0));
+ } else {
+ unsigned int i;
+
+ /* Map all VCs from this port to VC(nport) */
+ for (i = 0; i < 8; ++i)
+ ub960_rxport_write(priv, nport,
+ UB960_RR_VC_ID_MAP(i), nport);
+ }
+
+ break;
+ }
+
+ /* Forwarding */
+
+ fwd_ctl |= BIT(4 + nport); /* forward disable */
+
+ if (rx_data[nport].tx_port == 1)
+ fwd_ctl |= BIT(nport); /* forward to TX1 */
+ else
+ fwd_ctl &= ~BIT(nport); /* forward to TX0 */
+ }
+
+ ub960_write(priv, UB960_SR_FWD_CTL1, fwd_ctl);
+
+ return 0;
+}
+
+static void ub960_update_streaming_status(struct ub960_data *priv)
+{
+ unsigned int i;
+ bool streaming = false;
+
+ for (i = 0; i < UB960_MAX_NPORTS; ++i) {
+ if (priv->stream_enable_mask[i]) {
+ streaming = true;
+ break;
+ }
+ }
+
+ priv->streaming = streaming;
+}
+
+static int ub960_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 source_pad,
+ u64 source_streams_mask)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ struct device *dev = &priv->client->dev;
+ const struct v4l2_subdev_krouting *routing;
+ unsigned int source_stream;
+ int ret;
+ u64 sink_streams[UB960_MAX_RX_NPORTS] = { 0 };
+ unsigned int nport;
+ unsigned int failed_port;
+
+ dev_dbg(dev, "Enable streams %u:%#llx\n", source_pad,
+ source_streams_mask);
+
+ if (priv->stream_enable_mask[source_pad] & source_streams_mask) {
+ dev_err(dev,
+ "cannot enable already enabled streams on pad %u mask %#llx\n",
+ source_pad, source_streams_mask);
+ return -EBUSY;
+ }
+
+ routing = &state->routing;
+
+ if (!priv->streaming) {
+ dev_dbg(dev, "Prepare for streaming\n");
+ ret = ub960_configure_ports_for_streaming(priv, state);
+ if (ret)
+ return ret;
+ }
+
+ /* Enable TX port if not yet enabled */
+ if (!priv->stream_enable_mask[source_pad]) {
+ ret = ub960_enable_tx_port(priv,
+ ub960_pad_to_port(priv, source_pad));
+ if (ret)
+ return ret;
+ }
+
+ priv->stream_enable_mask[source_pad] |= source_streams_mask;
+
+ /* Collect sink streams per pad which we need to enable */
+ for (source_stream = 0; source_stream < sizeof(source_streams_mask) * 8;
+ ++source_stream) {
+ struct v4l2_subdev_route *route;
+
+ if (!(source_streams_mask & BIT_ULL(source_stream)))
+ continue;
+
+ for_each_active_route(routing, route) {
+ if (!(route->source_pad == source_pad) ||
+ !(route->source_stream == source_stream))
+ continue;
+
+ nport = ub960_pad_to_port(priv, route->sink_pad);
+
+ sink_streams[nport] |= BIT_ULL(route->sink_stream);
+ }
+ }
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct v4l2_subdev *source_sd;
+ struct media_pad *source_sd_pad;
+
+ if (!sink_streams[nport])
+ continue;
+
+ /* Enable the RX port if not yet enabled */
+ if (!priv->stream_enable_mask[nport]) {
+ ret = ub960_enable_rx_port(priv, nport);
+ if (ret) {
+ failed_port = nport;
+ goto err;
+ }
+ }
+
+ priv->stream_enable_mask[nport] |= sink_streams[nport];
+
+ dev_dbg(dev, "Enable RX port %u streams %#llx\n", nport,
+ sink_streams[nport]);
+
+ source_sd_pad = media_pad_remote_pad_first(&priv->pads[nport]);
+ source_sd = priv->rxports[nport]->sd;
+
+ ret = v4l2_subdev_enable_streams(
+ source_sd, source_sd_pad->index, sink_streams[nport]);
+ if (ret) {
+ priv->stream_enable_mask[nport] &= ~sink_streams[nport];
+
+ if (!priv->stream_enable_mask[nport])
+ ub960_disable_rx_port(priv, nport);
+
+ failed_port = nport;
+ goto err;
+ }
+ }
+
+ priv->streaming = true;
+
+ return 0;
+
+err:
+ for (nport = 0; nport < failed_port; ++nport) {
+ struct v4l2_subdev *source_sd;
+ struct media_pad *source_sd_pad;
+
+ if (!sink_streams[nport])
+ continue;
+
+ dev_dbg(dev, "Disable RX port %u streams %#llx\n", nport,
+ sink_streams[nport]);
+
+ source_sd_pad = media_pad_remote_pad_first(&priv->pads[nport]);
+ source_sd = priv->rxports[nport]->sd;
+
+ ret = v4l2_subdev_disable_streams(
+ source_sd, source_sd_pad->index, sink_streams[nport]);
+ WARN_ON(ret);
+
+ priv->stream_enable_mask[nport] &= ~sink_streams[nport];
+
+ /* Disable RX port if no active streams */
+ if (!priv->stream_enable_mask[nport])
+ ub960_disable_rx_port(priv, nport);
+ }
+
+ priv->stream_enable_mask[source_pad] &= ~source_streams_mask;
+
+ if (!priv->stream_enable_mask[source_pad])
+ ub960_disable_tx_port(priv,
+ ub960_pad_to_port(priv, source_pad));
+
+ ub960_update_streaming_status(priv);
+
+ return ret;
+}
+
+static int ub960_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ u32 source_pad, u64 source_streams_mask)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ struct device *dev = &priv->client->dev;
+ const struct v4l2_subdev_krouting *routing;
+ int ret;
+ unsigned int source_stream;
+ u64 sink_streams[UB960_MAX_RX_NPORTS] = { 0 };
+ unsigned int nport;
+
+ dev_dbg(dev, "Disable streams %u:%#llx\n", source_pad,
+ source_streams_mask);
+
+ if ((priv->stream_enable_mask[source_pad] & source_streams_mask) != source_streams_mask) {
+ dev_err(dev,
+ "cannot disable already disabled streams on pad %u mask %#llx\n",
+ source_pad, source_streams_mask);
+ return -EBUSY;
+ }
+
+ routing = &state->routing;
+
+ /* Collect sink streams per pad which we need to disable */
+ for (source_stream = 0; source_stream < sizeof(source_streams_mask) * 8;
+ ++source_stream) {
+ struct v4l2_subdev_route *route;
+
+ if (!(source_streams_mask & BIT_ULL(source_stream)))
+ continue;
+
+ for_each_active_route(routing, route) {
+ if (!(route->source_pad == source_pad) ||
+ !(route->source_stream == source_stream))
+ continue;
+
+ nport = ub960_pad_to_port(priv, route->sink_pad);
+
+ sink_streams[nport] |= BIT_ULL(route->sink_stream);
+ }
+ }
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct v4l2_subdev *source_sd;
+ struct media_pad *source_sd_pad;
+
+ if (!sink_streams[nport])
+ continue;
+
+ dev_dbg(dev, "Disable RX port %u streams %#llx\n", nport,
+ sink_streams[nport]);
+
+ source_sd_pad = media_pad_remote_pad_first(&priv->pads[nport]);
+ source_sd = priv->rxports[nport]->sd;
+
+ ret = v4l2_subdev_disable_streams(
+ source_sd, source_sd_pad->index, sink_streams[nport]);
+ WARN_ON(ret);
+
+ priv->stream_enable_mask[nport] &= ~sink_streams[nport];
+
+ /* Disable RX port if no active streams */
+ if (!priv->stream_enable_mask[nport])
+ ub960_disable_rx_port(priv, nport);
+ }
+
+ /* Disable TX port if no active streams */
+
+ priv->stream_enable_mask[source_pad] &= ~source_streams_mask;
+
+ if (!priv->stream_enable_mask[source_pad])
+ ub960_disable_tx_port(priv,
+ ub960_pad_to_port(priv, source_pad));
+
+ ub960_update_streaming_status(priv);
+
+ return 0;
+}
+
+static int ub960_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ const struct v4l2_subdev_krouting *routing;
+ struct v4l2_subdev_state *state;
+ struct v4l2_subdev_route *route;
+ u64 pad_stream_masks[UB960_MAX_TX_NPORTS] = { 0 };
+ unsigned int nport;
+ int ret = 0;
+
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ routing = &state->routing;
+
+ for_each_active_route(routing, route)
+ pad_stream_masks[ub960_pad_to_port(priv, route->source_pad)] |=
+ BIT_ULL(route->source_stream);
+
+ if (enable) {
+ for (nport = 0; nport < UB960_MAX_TX_NPORTS; ++nport) {
+ if (pad_stream_masks[nport] == 0)
+ continue;
+
+ ret = ub960_enable_streams(
+ sd, state, priv->hw_data->num_rxports + nport,
+ pad_stream_masks[nport]);
+
+ if (ret) {
+ for (; nport > 0; --nport) {
+ if (pad_stream_masks[nport - 1] == 0)
+ continue;
+
+ ub960_disable_streams(
+ sd, state,
+ priv->hw_data->num_rxports +
+ nport - 1,
+ pad_stream_masks[nport - 1]);
+ }
+
+ break;
+ }
+ }
+ } else {
+ for (nport = 0; nport < UB960_MAX_TX_NPORTS; ++nport) {
+ if (pad_stream_masks[nport] == 0)
+ continue;
+
+ ub960_disable_streams(
+ sd, state, priv->hw_data->num_rxports + nport,
+ pad_stream_masks[nport]);
+ }
+ }
+
+ v4l2_subdev_unlock_state(state);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_video_ops ub960_video_ops = {
+ .s_stream = ub960_s_stream,
+};
+
+static int _ub960_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_krouting *routing)
+{
+ const struct v4l2_mbus_framefmt format = {
+ .width = 640,
+ .height = 480,
+ .code = MEDIA_BUS_FMT_UYVY8_2X8,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .ycbcr_enc = V4L2_YCBCR_ENC_601,
+ .quantization = V4L2_QUANTIZATION_LIM_RANGE,
+ .xfer_func = V4L2_XFER_FUNC_SRGB,
+ };
+ int ret;
+
+ /*
+ * Note: we can only support up to V4L2_FRAME_DESC_ENTRY_MAX, until
+ * frame desc is made dynamically allocated.
+ */
+
+ if (routing->num_routes > V4L2_FRAME_DESC_ENTRY_MAX)
+ return -E2BIG;
+
+ /*
+ * TODO: We need a new flag to validate that all streams from a sink pad
+ * go to a single source pad.
+ */
+ ret = v4l2_subdev_routing_validate(sd, routing,
+ V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
+ if (ret)
+ return ret;
+
+ ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ub960_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ enum v4l2_subdev_format_whence which,
+ struct v4l2_subdev_krouting *routing)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+
+ if (which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->streaming)
+ return -EBUSY;
+
+ return _ub960_set_routing(sd, state, routing);
+}
+
+static int ub960_get_source_frame_desc(struct ub960_data *priv,
+ struct v4l2_mbus_frame_desc *desc,
+ u8 nport)
+{
+ struct v4l2_subdev *sd;
+ struct media_pad *pad;
+ int ret;
+
+ pad = media_pad_remote_pad_first(&priv->pads[nport]);
+ if (!pad)
+ return -EPIPE;
+
+ sd = priv->rxports[nport]->sd;
+
+ ret = v4l2_subdev_call(sd, pad, get_frame_desc, pad->index, desc);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ub960_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+ struct v4l2_mbus_frame_desc *fd)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ const struct v4l2_subdev_krouting *routing;
+ struct v4l2_subdev_route *route;
+ struct v4l2_subdev_state *state;
+ int ret = 0;
+ struct device *dev = &priv->client->dev;
+ u8 vc_map[UB960_MAX_RX_NPORTS] = { 0 };
+
+ if (!ub960_pad_is_source(priv, pad))
+ return -EINVAL;
+
+ state = v4l2_subdev_lock_and_get_active_state(&priv->sd);
+
+ ub960_get_vc_maps(priv, state, vc_map);
+
+ routing = &state->routing;
+
+ memset(fd, 0, sizeof(*fd));
+
+ fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
+
+ for_each_active_route(routing, route) {
+ struct v4l2_mbus_frame_desc_entry *source_entry = NULL;
+ struct v4l2_mbus_frame_desc source_fd;
+ unsigned int j;
+ unsigned int nrxport;
+
+ if (route->source_pad != pad)
+ continue;
+
+ ret = ub960_get_source_frame_desc(priv, &source_fd,
+ route->sink_pad);
+ if (ret) {
+ dev_err(dev,
+ "Failed to get source frame desc for port %u\n",
+ route->sink_pad);
+ goto out;
+ }
+
+ for (j = 0; j < source_fd.num_entries; ++j)
+ if (source_fd.entry[j].stream == route->sink_stream) {
+ source_entry = &source_fd.entry[j];
+ break;
+ }
+
+ if (!source_entry) {
+ dev_err(dev,
+ "Failed to find stream from source frame desc\n");
+ ret = -EPIPE;
+ goto out;
+ }
+
+ fd->entry[fd->num_entries].stream = route->source_stream;
+ fd->entry[fd->num_entries].flags = source_entry->flags;
+ fd->entry[fd->num_entries].length = source_entry->length;
+ fd->entry[fd->num_entries].pixelcode = source_entry->pixelcode;
+
+ nrxport = ub960_pad_to_port(priv, route->sink_pad);
+
+ fd->entry[fd->num_entries].bus.csi2.vc = vc_map[nrxport];
+
+ if (source_fd.type == V4L2_MBUS_FRAME_DESC_TYPE_CSI2) {
+ fd->entry[fd->num_entries].bus.csi2.dt =
+ source_entry->bus.csi2.dt;
+ } else {
+ const struct ub960_format_info *ub960_fmt;
+ struct v4l2_mbus_framefmt *fmt;
+
+ fmt = v4l2_subdev_state_get_stream_format(
+ state, pad, route->source_stream);
+
+ if (!fmt) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ub960_fmt = ub960_find_format(fmt->code);
+ if (!ub960_fmt) {
+ dev_err(dev, "Unable to find format\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ fd->entry[fd->num_entries].bus.csi2.dt =
+ ub960_fmt->datatype;
+ }
+
+ fd->num_entries++;
+ }
+
+out:
+ v4l2_subdev_unlock_state(state);
+
+ return ret;
+}
+
+static int ub960_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *format)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ struct v4l2_mbus_framefmt *fmt;
+
+ if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->streaming)
+ return -EBUSY;
+
+ /* No transcoding, source and sink formats must match. */
+ if (ub960_pad_is_source(priv, format->pad))
+ return v4l2_subdev_get_fmt(sd, state, format);
+
+ /* TODO: implement fmt validation */
+
+ fmt = v4l2_subdev_state_get_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = format->format;
+
+ fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = format->format;
+
+ return 0;
+}
+
+static int ub960_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+
+ struct v4l2_subdev_route routes[] = {
+ {
+ .sink_pad = 0,
+ .sink_stream = 0,
+ .source_pad = priv->hw_data->num_rxports,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ };
+
+ struct v4l2_subdev_krouting routing = {
+ .num_routes = ARRAY_SIZE(routes),
+ .routes = routes,
+ };
+
+ return _ub960_set_routing(sd, state, &routing);
+}
+
+static const struct v4l2_subdev_pad_ops ub960_pad_ops = {
+ .enable_streams = ub960_enable_streams,
+ .disable_streams = ub960_disable_streams,
+
+ .set_routing = ub960_set_routing,
+ .get_frame_desc = ub960_get_frame_desc,
+
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = ub960_set_fmt,
+
+ .init_cfg = ub960_init_cfg,
+};
+
+static int ub960_log_status(struct v4l2_subdev *sd)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ struct device *dev = &priv->client->dev;
+ struct v4l2_subdev_state *state;
+ unsigned int nport;
+ u8 v = 0, v1 = 0, v2 = 0;
+ unsigned int i;
+ char id[7];
+
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ for (i = 0; i < 6; ++i)
+ ub960_read(priv, UB960_SR_FPD3_RX_ID(i), &id[i]);
+ id[6] = 0;
+
+ dev_info(dev, "ID '%s'\n", id);
+
+ for (nport = 0; nport < priv->hw_data->num_txports; ++nport) {
+ struct ub960_txport *txport = priv->txports[nport];
+
+ dev_info(dev, "TX %u\n", nport);
+
+ if (!txport) {
+ dev_info(dev, "\tNot initialized\n");
+ continue;
+ }
+
+ ub960_csiport_read(priv, nport, UB960_TR_CSI_STS, &v);
+ dev_info(dev, "\tsync %u, pass %u\n", v & (u8)BIT(1), v & (u8)BIT(0));
+
+ ub960_read(priv, UB960_SR_CSI_FRAME_COUNT_HI(nport), &v1);
+ ub960_read(priv, UB960_SR_CSI_FRAME_COUNT_LO(nport), &v2);
+ dev_info(dev, "\tframe counter %u\n", (v1 << 8) | v2);
+
+ ub960_read(priv, UB960_SR_CSI_FRAME_ERR_COUNT_HI(nport), &v1);
+ ub960_read(priv, UB960_SR_CSI_FRAME_ERR_COUNT_LO(nport), &v2);
+ dev_info(dev, "\tframe error counter %u\n", (v1 << 8) | v2);
+
+ ub960_read(priv, UB960_SR_CSI_LINE_COUNT_HI(nport), &v1);
+ ub960_read(priv, UB960_SR_CSI_LINE_COUNT_LO(nport), &v2);
+ dev_info(dev, "\tline counter %u\n", (v1 << 8) | v2);
+
+ ub960_read(priv, UB960_SR_CSI_LINE_ERR_COUNT_HI(nport), &v1);
+ ub960_read(priv, UB960_SR_CSI_LINE_ERR_COUNT_LO(nport), &v2);
+ dev_info(dev, "\tline error counter %u\n", (v1 << 8) | v2);
+ }
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ u8 eq_level;
+ s8 strobe_pos;
+ unsigned int i;
+
+ dev_info(dev, "RX %u\n", nport);
+
+ if (!rxport) {
+ dev_info(dev, "\tNot initialized\n");
+ continue;
+ }
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS1, &v);
+
+ if (v & UB960_RR_RX_PORT_STS1_LOCK_STS)
+ dev_info(dev, "\tLocked\n");
+ else
+ dev_info(dev, "\tNot locked\n");
+
+ dev_info(dev, "\trx_port_sts1 %#x\n", v);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS2, &v);
+ dev_info(dev, "\trx_port_sts2 %#x\n", v);
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_FREQ_HIGH, &v1);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_FREQ_LOW, &v2);
+ dev_info(dev, "\tlink freq %u MHz\n", v1 * 1000000 + v2 * 1000000 / 256);
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_HI, &v1);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_LO, &v2);
+ dev_info(dev, "\tparity errors %u\n", (v1 << 8) | v2);
+
+ ub960_rxport_read(priv, nport, UB960_RR_LINE_COUNT_HI, &v1);
+ ub960_rxport_read(priv, nport, UB960_RR_LINE_COUNT_LO, &v2);
+ dev_info(dev, "\tlines per frame %u\n", (v1 << 8) | v2);
+
+ ub960_rxport_read(priv, nport, UB960_RR_LINE_LEN_1, &v1);
+ ub960_rxport_read(priv, nport, UB960_RR_LINE_LEN_0, &v2);
+ dev_info(dev, "\tbytes per line %u\n", (v1 << 8) | v2);
+
+ ub960_rxport_read(priv, nport, UB960_RR_CSI_ERR_COUNTER, &v);
+ dev_info(dev, "\tcsi_err_counter %u\n", v);
+
+ /* Strobe */
+
+ ub960_read(priv, UB960_XR_AEQ_CTL1, &v);
+
+ dev_info(dev, "\t%s strobe\n",
+ (v & UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN) ? "Adaptive" :
+ "Manual");
+
+ if (v & UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN) {
+ ub960_read(priv, UB960_XR_SFILTER_CFG, &v);
+
+ dev_info(dev, "\tStrobe range [%d, %d]\n",
+ ((v >> UB960_XR_SFILTER_CFG_SFILTER_MIN_SHIFT) & 0xf) - 7,
+ ((v >> UB960_XR_SFILTER_CFG_SFILTER_MAX_SHIFT) & 0xf) - 7);
+ }
+
+ ub960_rxport_get_strobe_pos(priv, nport, &strobe_pos);
+
+ dev_info(dev, "\tStrobe pos %d\n", strobe_pos);
+
+ /* EQ */
+
+ ub960_rxport_read(priv, nport, UB960_RR_AEQ_BYPASS, &v);
+
+ dev_info(dev, "\t%s EQ\n",
+ (v & UB960_RR_AEQ_BYPASS_ENABLE) ? "Manual" :
+ "Adaptive");
+
+ if (!(v & UB960_RR_AEQ_BYPASS_ENABLE)) {
+ ub960_rxport_read(priv, nport, UB960_RR_AEQ_MIN_MAX, &v);
+
+ dev_info(dev, "\tEQ range [%u, %u]\n",
+ (v >> UB960_RR_AEQ_MIN_MAX_AEQ_FLOOR_SHIFT) & 0xf,
+ (v >> UB960_RR_AEQ_MIN_MAX_AEQ_MAX_SHIFT) & 0xf);
+ }
+
+ ub960_rxport_get_eq_level(priv, nport, &eq_level);
+
+ dev_info(dev, "\tEQ level %u\n", eq_level);
+
+ /* GPIOs */
+ for (i = 0; i < UB960_NUM_BC_GPIOS; ++i) {
+ u8 ctl_reg;
+ u8 ctl_shift;
+
+ ctl_reg = UB960_RR_BC_GPIO_CTL(i / 2);
+ ctl_shift = (i % 2) * 4;
+
+ ub960_rxport_read(priv, nport, ctl_reg, &v);
+
+ dev_info(dev, "\tGPIO%u: mode %u\n", i,
+ (v >> ctl_shift) & 0xf);
+ }
+ }
+
+ v4l2_subdev_unlock_state(state);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops ub960_subdev_core_ops = {
+ .log_status = ub960_log_status,
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_ops ub960_subdev_ops = {
+ .core = &ub960_subdev_core_ops,
+ .video = &ub960_video_ops,
+ .pad = &ub960_pad_ops,
+};
+
+static const struct media_entity_operations ub960_entity_ops = {
+ .get_fwnode_pad = v4l2_subdev_get_fwnode_pad_1_to_1,
+ .link_validate = v4l2_subdev_link_validate,
+ .has_pad_interdep = v4l2_subdev_has_pad_interdep,
+};
+
+static void ub960_enable_tpg(struct ub960_data *priv, int tpg_num)
+{
+ /*
+ * Note: no need to write UB960_REG_IND_ACC_CTL: the only indirect
+ * registers target we use is "CSI-2 Pattern Generator & Timing
+ * Registers", which is the default
+ */
+
+ /*
+ * TPG can only provide a single stream per CSI TX port. If
+ * multiple streams are currently enabled, only the first
+ * one will use the TPG, other streams will be halted.
+ */
+
+ struct v4l2_mbus_framefmt *fmt;
+ u8 vbp, vfp;
+ u16 blank_lines;
+ u16 width;
+ u16 height;
+
+ u16 bytespp = 2; /* For MEDIA_BUS_FMT_UYVY8_1X16 */
+ u8 cbars_idx = tpg_num - TEST_PATTERN_V_COLOR_BARS_1;
+ u8 num_cbars = 1 << cbars_idx;
+
+ u16 line_size; /* Line size [bytes] */
+ u16 bar_size; /* cbar size [bytes] */
+ u16 act_lpf; /* active lines/frame */
+ u16 tot_lpf; /* tot lines/frame */
+ u16 line_pd; /* Line period in 10-ns units */
+
+ struct v4l2_subdev_state *state;
+
+ state = v4l2_subdev_get_locked_active_state(&priv->sd);
+
+ vbp = 33;
+ vfp = 10;
+ blank_lines = vbp + vfp + 2; /* total blanking lines */
+
+ fmt = v4l2_subdev_state_get_stream_format(state, 4, 0);
+ if (!fmt) {
+ dev_err(&priv->client->dev, "failed to enable TPG\n");
+ return;
+ }
+
+ width = fmt->width;
+ height = fmt->height;
+
+ line_size = width * bytespp;
+ bar_size = line_size / num_cbars;
+ act_lpf = height;
+ tot_lpf = act_lpf + blank_lines;
+ line_pd = 100000000 / 60 / tot_lpf;
+
+ /* Disable forwarding from FPD-3 RX ports */
+ ub960_read(priv, UB960_SR_FWD_CTL1, &priv->stored_fwd_ctl);
+ ub960_write(priv, UB960_SR_FWD_CTL1, 0xf << 4);
+
+ ub960_write_ind(priv, UB960_IND_TARGET_PAT_GEN, UB960_IR_PGEN_CTL,
+ UB960_IR_PGEN_CTL_PGEN_ENABLE);
+
+ /* YUV422 8bit: 2 bytes/block, CSI-2 data type 0x1e */
+ ub960_write_ind(priv, UB960_IND_TARGET_PAT_GEN, UB960_IR_PGEN_CFG,
+ cbars_idx << 4 | 0x2);
+ ub960_write_ind(priv, UB960_IND_TARGET_PAT_GEN, UB960_IR_PGEN_CSI_DI,
+ 0x1e);
+
+ ub960_write_ind16(priv, UB960_IND_TARGET_PAT_GEN,
+ UB960_IR_PGEN_LINE_SIZE1, line_size);
+ ub960_write_ind16(priv, UB960_IND_TARGET_PAT_GEN,
+ UB960_IR_PGEN_BAR_SIZE1, bar_size);
+ ub960_write_ind16(priv, UB960_IND_TARGET_PAT_GEN,
+ UB960_IR_PGEN_ACT_LPF1, act_lpf);
+ ub960_write_ind16(priv, UB960_IND_TARGET_PAT_GEN,
+ UB960_IR_PGEN_TOT_LPF1, tot_lpf);
+ ub960_write_ind16(priv, UB960_IND_TARGET_PAT_GEN,
+ UB960_IR_PGEN_LINE_PD1, line_pd);
+ ub960_write_ind(priv, UB960_IND_TARGET_PAT_GEN, UB960_IR_PGEN_VBP, vbp);
+ ub960_write_ind(priv, UB960_IND_TARGET_PAT_GEN, UB960_IR_PGEN_VFP, vfp);
+}
+
+static void ub960_disable_tpg(struct ub960_data *priv)
+{
+ /* TPG off, enable forwarding from FPD-3 RX ports */
+ ub960_write(priv, UB960_SR_FWD_CTL1, priv->stored_fwd_ctl);
+
+ ub960_write_ind(priv, UB960_IND_TARGET_PAT_GEN, UB960_IR_PGEN_CTL, 0x00);
+}
+
+static int ub960_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct ub960_data *priv =
+ container_of(ctrl->handler, struct ub960_data, ctrl_handler);
+
+ switch (ctrl->id) {
+ case V4L2_CID_TEST_PATTERN:
+ if (ctrl->val == 0)
+ ub960_disable_tpg(priv);
+ else
+ ub960_enable_tpg(priv, ctrl->val);
+ break;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops ub960_ctrl_ops = {
+ .s_ctrl = ub960_s_ctrl,
+};
+
+/* -----------------------------------------------------------------------------
+ * Core
+ */
+
+static irqreturn_t ub960_handle_events(int irq, void *arg)
+{
+ struct ub960_data *priv = arg;
+ unsigned int i;
+ u8 int_sts;
+ int ret;
+
+ ret = ub960_read(priv, UB960_SR_INTERRUPT_STS, &int_sts);
+
+ if (!ret && int_sts) {
+ u8 fwd_sts;
+
+ dev_dbg(&priv->client->dev, "INTERRUPT_STS %x\n", int_sts);
+
+ ub960_read(priv, UB960_SR_FWD_STS, &fwd_sts);
+
+ dev_dbg(&priv->client->dev, "FWD_STS %#x\n", fwd_sts);
+
+ for (i = 0; i < priv->hw_data->num_txports; ++i) {
+ if (int_sts & UB960_SR_INTERRUPT_STS_IS_CSI_TX(i))
+ ub960_csi_handle_events(priv, i);
+ }
+
+ for (i = 0; i < priv->hw_data->num_rxports; i++) {
+ if (!priv->rxports[i])
+ continue;
+
+ if (int_sts & UB960_SR_INTERRUPT_STS_IS_RX(i))
+ ub960_rxport_handle_events(priv, i);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void ub960_handler_work(struct work_struct *work)
+{
+ struct delayed_work *dwork = to_delayed_work(work);
+ struct ub960_data *priv =
+ container_of(dwork, struct ub960_data, poll_work);
+
+ ub960_handle_events(0, priv);
+
+ schedule_delayed_work(&priv->poll_work,
+ msecs_to_jiffies(UB960_POLL_TIME_MS));
+}
+
+static void ub960_txport_free_ports(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_txports; nport++) {
+ struct ub960_txport *txport = priv->txports[nport];
+
+ if (!txport)
+ continue;
+
+ kfree(txport);
+ priv->txports[nport] = NULL;
+ }
+}
+
+static void ub960_rxport_free_ports(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ fwnode_handle_put(rxport->fwnode);
+ of_node_put(rxport->remote_of_node);
+
+ kfree(rxport);
+ priv->rxports[nport] = NULL;
+ }
+}
+
+static int ub960_parse_dt_base(struct ub960_data *priv)
+{
+ struct device_node *np = priv->client->dev.of_node;
+ struct device *dev = &priv->client->dev;
+ size_t table_size;
+ u16 *aliases;
+ int ret;
+
+ ret = of_property_count_u16_elems(np, "i2c-alias-pool");
+ if (ret < 0) {
+ dev_err(dev, "Failed to count 'i2c-alias-pool' property: %d\n",
+ ret);
+ return ret;
+ }
+
+ table_size = ret;
+ priv->atr_alias_table.num_entries = ret;
+
+ if (!table_size)
+ return 0;
+
+ priv->atr_alias_table.entries =
+ devm_kcalloc(dev, table_size,
+ sizeof(struct atr_alias_table_entry), GFP_KERNEL);
+ if (!priv->atr_alias_table.entries)
+ return -ENOMEM;
+
+ aliases = kcalloc(table_size, sizeof(u16), GFP_KERNEL);
+ if (!aliases)
+ return -ENOMEM;
+
+ ret = of_property_read_u16_array(np, "i2c-alias-pool", aliases,
+ table_size);
+ if (ret < 0) {
+ dev_err(dev, "Failed to read 'i2c-alias-pool' property: %d\n",
+ ret);
+ kfree(aliases);
+ return ret;
+ }
+
+ for (unsigned int i = 0; i < table_size; ++i)
+ priv->atr_alias_table.entries[i].alias_id = aliases[i];
+
+ kfree(aliases);
+
+ dev_dbg(dev, "i2c-alias-pool has %zu aliases", table_size);
+
+ return 0;
+}
+
+static int ub960_parse_dt_rxport_link_properties(struct ub960_data *priv,
+ struct device_node *np,
+ struct ub960_rxport *rxport)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+ u32 rx_mode;
+ u32 cdr_mode;
+ s32 strobe_pos;
+ u32 eq_level;
+ unsigned int nport = rxport->nport;
+
+ ret = of_property_read_u32(np, "ti,cdr-mode", &cdr_mode);
+ if (ret == -EINVAL) {
+ cdr_mode = RXPORT_CDR_FPD3;
+ } else if (ret < 0) {
+ dev_err(dev, "Failed to get RX port CDR mode: %d\n", ret);
+ return ret;
+ }
+
+ if (cdr_mode > RXPORT_CDR_LAST) {
+ dev_err(dev, "Bad RX port cdr %u\n", cdr_mode);
+ return -EINVAL;
+ }
+
+ if (!priv->hw_data->fpdlink4 && cdr_mode == RXPORT_CDR_FPD4) {
+ dev_err(dev, "FPD-Link 4 CDR not supported on RX port %u\n",
+ nport);
+ return -EINVAL;
+ }
+
+ rxport->cdr_mode = cdr_mode;
+
+ ret = of_property_read_u32(np, "ti,rx-mode", &rx_mode);
+ if (ret < 0) {
+ dev_err(dev, "Missing RX port RX mode: %d\n", ret);
+ return ret;
+ }
+
+ if (rx_mode > RXPORT_MODE_LAST) {
+ dev_err(dev, "Bad RX port RX mode %u\n", rx_mode);
+ return -EINVAL;
+ }
+
+ rxport->rx_mode = rx_mode;
+
+ /* EQ & Strobe related */
+
+ /* Defaults */
+ rxport->eq.manual_eq = false;
+ rxport->eq.aeq.eq_level_min = UB960_MIN_EQ_LEVEL;
+ rxport->eq.aeq.eq_level_max = UB960_MAX_EQ_LEVEL;
+
+ ret = of_property_read_s32(np, "ti,strobe-pos", &strobe_pos);
+ if (ret) {
+ if (ret != -EINVAL) {
+ dev_err(dev, "Failed to read 'ti,strobe-pos': %d\n", ret);
+ return ret;
+ }
+ } else if (strobe_pos < UB960_MIN_MANUAL_STROBE_POS ||
+ strobe_pos > UB960_MAX_MANUAL_STROBE_POS) {
+ dev_err(dev, "Illegal 'strobe-pos' value: %d\n", strobe_pos);
+ } else {
+ // NOTE: ignored unless global manual strobe pos is set
+ rxport->eq.strobe_pos = strobe_pos;
+ if (!priv->strobe.manual)
+ dev_warn(dev, "'ti,strobe-pos' ignored as 'ti,manual-strobe' not set\n");
+ }
+
+ ret = of_property_read_u32(np, "ti,eq-level", &eq_level);
+ if (ret) {
+ if (ret != -EINVAL) {
+ dev_err(dev, "Failed to read 'ti,eq-level': %d\n", ret);
+ return ret;
+ }
+ } else if (eq_level > UB960_MAX_EQ_LEVEL) {
+ dev_err(dev, "Illegal 'ti,eq-level' value: %d\n", eq_level);
+ } else {
+ rxport->eq.manual_eq = true;
+ rxport->eq.manual.eq_level = eq_level;
+ }
+
+ return 0;
+}
+
+static int ub960_parse_dt_rxport_ep_properties(struct ub960_data *priv, struct ub960_rxport *rxport)
+{
+ struct device *dev = &priv->client->dev;
+ struct device_node *ep_np;
+ int ret;
+ u32 v;
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ break;
+ default:
+ return 0;
+ }
+
+ ep_np = of_graph_get_endpoint_by_regs(priv->client->dev.of_node,
+ rxport->nport, 0);
+ if (!ep_np)
+ return -EINVAL;
+
+ ret = of_property_read_u32(ep_np, "hsync-active", &v);
+ if (ret) {
+ dev_err(dev, "Failed to parse 'hsync-active' for port %u: %d\n",
+ rxport->nport, ret);
+ goto err;
+ }
+
+ rxport->lv_fv_pol |= v ? UB960_RR_PORT_CONFIG2_LV_POL_LOW : 0;
+
+ ret = of_property_read_u32(ep_np, "vsync-active", &v);
+ if (ret) {
+ dev_err(dev, "Failed to parse 'vsync-active' for port %u: %d\n",
+ rxport->nport, ret);
+ goto err;
+ }
+
+ rxport->lv_fv_pol |= v ? UB960_RR_PORT_CONFIG2_FV_POL_LOW : 0;
+
+ return 0;
+err:
+ of_node_put(ep_np);
+ return ret;
+}
+
+static int ub960_parse_dt_rxport(struct ub960_data *priv,
+ struct device_node *np)
+{
+ const char *vpoc_names[UB960_MAX_RX_NPORTS] = { "vpoc0", "vpoc1",
+ "vpoc2", "vpoc3" };
+ struct device *dev = &priv->client->dev;
+ unsigned int nport;
+ int ret;
+ struct ub960_rxport *rxport;
+ u32 ser_i2c_alias;
+ struct device_node *ep_np;
+ struct fwnode_handle *remote_ep_node;
+
+ ret = of_property_read_u32(np, "reg", &nport);
+ if (ret) {
+ dev_err(dev, "Failed to get link reg\n");
+ return ret;
+ }
+
+ if (priv->rxports[nport]) {
+ dev_err(dev, "OF: %s: reg value %d is duplicated\n",
+ of_node_full_name(np), nport);
+ return -EADDRINUSE;
+ }
+
+ rxport = kzalloc(sizeof(*rxport), GFP_KERNEL);
+ if (!rxport)
+ return -ENOMEM;
+
+ priv->rxports[nport] = rxport;
+
+ rxport->nport = nport;
+ rxport->priv = priv;
+
+ ret = ub960_parse_dt_rxport_link_properties(priv, np, rxport);
+ if (ret)
+ goto err_free_rxport;
+
+ ret = of_property_read_u32(np, "i2c-alias", &ser_i2c_alias);
+ if (ret) {
+ dev_err(dev, "Failed to get serializer i2c-alias: %d\n", ret);
+ goto err_free_rxport;
+ }
+ rxport->ser_alias = ser_i2c_alias;
+
+ rxport->vpoc = devm_regulator_get_optional(dev, vpoc_names[nport]);
+ if (IS_ERR(rxport->vpoc)) {
+ ret = PTR_ERR(rxport->vpoc);
+ if (ret == -ENODEV) {
+ rxport->vpoc = NULL;
+ } else {
+ dev_err(dev, "Failed to get VPOC supply: %d\n", ret);
+ goto err_free_rxport;
+ }
+ }
+
+ rxport->remote_of_node = of_get_child_by_name(np, "serializer");
+ if (!rxport->remote_of_node) {
+ dev_err(dev, "OF: %s: missing remote-chip child\n",
+ of_node_full_name(np));
+ ret = -EINVAL;
+ goto err_free_rxport;
+ }
+
+ /* We also parse the endpoint data here */
+
+ ep_np = of_graph_get_endpoint_by_regs(priv->client->dev.of_node, nport, 0);
+ if (!ep_np) {
+ dev_err(dev, "Missing OF graph endpoint for link %u\n", nport);
+ ret = -EINVAL;
+ goto err_ser_node_put;
+ }
+
+ remote_ep_node = fwnode_graph_get_remote_endpoint(of_fwnode_handle(ep_np));
+
+ of_node_put(ep_np);
+
+ if (!remote_ep_node) {
+ dev_err(dev, "No remote endpoint for rxport%d\n", nport);
+ ret = -ENODEV;
+ goto err_ser_node_put;
+ }
+
+ rxport->fwnode = remote_ep_node;
+
+ ret = ub960_parse_dt_rxport_ep_properties(priv, rxport);
+ if (ret)
+ goto err_remote_ep_node_put;
+
+ return 0;
+
+err_remote_ep_node_put:
+ fwnode_handle_put(rxport->fwnode);
+err_ser_node_put:
+ of_node_put(rxport->remote_of_node);
+err_free_rxport:
+ priv->rxports[nport] = NULL;
+ kfree(rxport);
+ return ret;
+}
+
+static struct device_node *
+ub960_of_get_link_by_regs(struct device_node *links_np, unsigned int nport)
+{
+ struct device_node *link_np;
+ int ret;
+
+ for_each_child_of_node(links_np, link_np) {
+ u32 link_num;
+
+ if (!of_node_name_eq(link_np, "link"))
+ continue;
+
+ ret = of_property_read_u32(link_np, "reg", &link_num);
+ if (ret)
+ return NULL;
+
+ if (nport == link_num) {
+ of_node_get(link_np);
+ return link_np;
+ }
+ }
+
+ return NULL;
+}
+
+static int ub960_parse_dt_rxports(struct ub960_data *priv)
+{
+ struct device_node *np = priv->client->dev.of_node;
+ struct device *dev = &priv->client->dev;
+ struct device_node *links_np;
+ unsigned int nport;
+ int ret;
+
+ links_np = of_get_child_by_name(np, "links");
+ if (!links_np) {
+ dev_err(dev, "links node missing\n");
+ return -ENODEV;
+ }
+
+ /* Defaults, recommended by TI */
+ priv->strobe.min = 2;
+ priv->strobe.max = 3;
+
+ priv->strobe.manual = of_property_read_bool(links_np, "ti,manual-strobe");
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct device_node *link_np;
+
+ link_np = ub960_of_get_link_by_regs(links_np, nport);
+ if (!link_np)
+ continue;
+
+ ret = ub960_parse_dt_rxport(priv, link_np);
+
+ of_node_put(link_np);
+
+ if (ret) {
+ dev_err(dev, "Failed to parse link node\n");
+ goto err_put_links;
+ }
+ }
+
+ of_node_put(links_np);
+
+ return 0;
+
+err_put_links:
+ of_node_put(links_np);
+
+ return ret;
+}
+
+static int ub960_parse_dt_txports(struct ub960_data *priv)
+{
+ struct device_node *np = priv->client->dev.of_node;
+ u32 nport;
+ int ret;
+
+ for (nport = 0; nport < priv->hw_data->num_txports; ++nport) {
+ struct device_node *ep_np;
+
+ ep_np = of_graph_get_endpoint_by_regs(np, nport + priv->hw_data->num_rxports, 0);
+ if (!ep_np)
+ continue;
+
+ ret = ub960_parse_dt_txport(priv, ep_np, nport);
+
+ of_node_put(ep_np);
+
+ if (ret)
+ break;
+ }
+
+ return 0;
+}
+
+static int ub960_parse_dt(struct ub960_data *priv)
+{
+ struct device_node *np = priv->client->dev.of_node;
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ if (!np) {
+ dev_err(dev, "OF: no device tree node!\n");
+ return -ENOENT;
+ }
+
+ ret = ub960_parse_dt_base(priv);
+ if (ret)
+ return ret;
+
+ ret = ub960_parse_dt_rxports(priv);
+ if (ret)
+ return ret;
+
+ ret = ub960_parse_dt_txports(priv);
+ if (ret)
+ goto err_free_rxports;
+
+ return 0;
+
+err_free_rxports:
+ ub960_rxport_free_ports(priv);
+
+ return ret;
+}
+
+static int ub960_notify_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct ub960_data *priv = sd_to_ub960(notifier->sd);
+ struct ub960_rxport *rxport = to_ub960_asd(asd)->rxport;
+ struct device *dev = &priv->client->dev;
+ u8 nport = rxport->nport;
+ unsigned int src_pad;
+ unsigned int i;
+ int ret;
+
+ ret = media_entity_get_fwnode_pad(&subdev->entity, rxport->fwnode,
+ MEDIA_PAD_FL_SOURCE);
+ if (ret < 0) {
+ dev_err(dev, "Failed to find pad for %s\n", subdev->name);
+ return ret;
+ }
+
+ rxport->sd = subdev;
+ src_pad = ret;
+
+ ret = media_create_pad_link(&rxport->sd->entity, src_pad,
+ &priv->sd.entity, nport,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (ret) {
+ dev_err(dev, "Unable to link %s:%u -> %s:%u\n",
+ rxport->sd->name, src_pad, priv->sd.name, nport);
+ return ret;
+ }
+
+ dev_dbg(dev, "Bound %s pad: %u on index %u\n", subdev->name, src_pad,
+ nport);
+
+ for (i = 0; i < priv->hw_data->num_rxports; ++i) {
+ if (priv->rxports[i] && !priv->rxports[i]->sd) {
+ dev_dbg(dev, "Waiting for more subdevs to be bound\n");
+ return 0;
+ }
+ }
+
+ dev_dbg(dev, "All subdevs bound\n");
+
+ return 0;
+}
+
+static void ub960_notify_unbind(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct ub960_rxport *rxport = to_ub960_asd(asd)->rxport;
+
+ rxport->sd = NULL;
+}
+
+static const struct v4l2_async_notifier_operations ub960_notify_ops = {
+ .bound = ub960_notify_bound,
+ .unbind = ub960_notify_unbind,
+};
+
+static int ub960_v4l2_notifier_register(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int i;
+ int ret;
+
+ v4l2_async_nf_init(&priv->notifier);
+
+ for (i = 0; i < priv->hw_data->num_rxports; ++i) {
+ struct ub960_rxport *rxport = priv->rxports[i];
+ struct ub960_asd *asd;
+
+ if (!rxport)
+ continue;
+
+ asd = v4l2_async_nf_add_fwnode(&priv->notifier, rxport->fwnode,
+ struct ub960_asd);
+ if (IS_ERR(asd)) {
+ dev_err(dev, "Failed to add subdev for source %u: %ld",
+ i, PTR_ERR(asd));
+ v4l2_async_nf_cleanup(&priv->notifier);
+ return PTR_ERR(asd);
+ }
+
+ asd->rxport = rxport;
+ }
+
+ priv->notifier.ops = &ub960_notify_ops;
+
+ ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier);
+ if (ret) {
+ dev_err(dev, "Failed to register subdev_notifier");
+ v4l2_async_nf_cleanup(&priv->notifier);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ub960_v4l2_notifier_unregister(struct ub960_data *priv)
+{
+ v4l2_async_nf_unregister(&priv->notifier);
+ v4l2_async_nf_cleanup(&priv->notifier);
+}
+
+static int ub960_create_subdev(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int i;
+ int ret;
+
+ v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub960_subdev_ops);
+ v4l2_ctrl_handler_init(&priv->ctrl_handler,
+ ARRAY_SIZE(ub960_tpg_qmenu) - 1);
+ priv->sd.ctrl_handler = &priv->ctrl_handler;
+
+ v4l2_ctrl_new_std_menu_items(&priv->ctrl_handler, &ub960_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(ub960_tpg_qmenu) - 1, 0, 0,
+ ub960_tpg_qmenu);
+
+ v4l2_ctrl_new_int_menu(&priv->ctrl_handler, NULL, V4L2_CID_LINK_FREQ,
+ ARRAY_SIZE(priv->tx_link_freq) - 1, 0,
+ priv->tx_link_freq);
+
+ if (priv->ctrl_handler.error) {
+ ret = priv->ctrl_handler.error;
+ goto err_free_ctrl;
+ }
+
+ priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS |
+ V4L2_SUBDEV_FL_STREAMS;
+ priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ priv->sd.entity.ops = &ub960_entity_ops;
+
+ for (i = 0; i < priv->hw_data->num_rxports + priv->hw_data->num_txports; i++) {
+ priv->pads[i].flags = ub960_pad_is_sink(priv, i) ?
+ MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
+ }
+
+ ret = media_entity_pads_init(&priv->sd.entity,
+ priv->hw_data->num_rxports +
+ priv->hw_data->num_txports,
+ priv->pads);
+ if (ret)
+ goto err_free_ctrl;
+
+ priv->sd.state_lock = priv->sd.ctrl_handler->lock;
+
+ ret = v4l2_subdev_init_finalize(&priv->sd);
+ if (ret)
+ goto err_entity_cleanup;
+
+ ret = ub960_v4l2_notifier_register(priv);
+ if (ret) {
+ dev_err(dev, "v4l2 subdev notifier register failed: %d\n", ret);
+ goto err_free_state;
+ }
+
+ ret = v4l2_async_register_subdev(&priv->sd);
+ if (ret) {
+ dev_err(dev, "v4l2_async_register_subdev error: %d\n", ret);
+ goto err_unreg_notif;
+ }
+
+ return 0;
+
+err_unreg_notif:
+ ub960_v4l2_notifier_unregister(priv);
+err_free_state:
+ v4l2_subdev_cleanup(&priv->sd);
+err_entity_cleanup:
+ media_entity_cleanup(&priv->sd.entity);
+err_free_ctrl:
+ v4l2_ctrl_handler_free(&priv->ctrl_handler);
+
+ return ret;
+}
+
+static void ub960_destroy_subdev(struct ub960_data *priv)
+{
+ ub960_v4l2_notifier_unregister(priv);
+ v4l2_async_unregister_subdev(&priv->sd);
+
+ v4l2_subdev_cleanup(&priv->sd);
+
+ media_entity_cleanup(&priv->sd.entity);
+ v4l2_ctrl_handler_free(&priv->ctrl_handler);
+}
+
+static const struct regmap_config ub960_regmap_config = {
+ .name = "ds90ub960",
+
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0xff,
+
+ /*
+ * We do locking in the driver to cover the TX/RX port selection and the
+ * indirect register access.
+ */
+ .disable_locking = true,
+};
+
+static void ub960_reset(struct ub960_data *priv, bool reset_regs)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int v;
+ int ret;
+ u8 bit;
+
+ bit = reset_regs ? UB960_SR_RESET_DIGITAL_RESET1 :
+ UB960_SR_RESET_DIGITAL_RESET0;
+
+ ub960_write(priv, UB960_SR_RESET, bit);
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_read_poll_timeout(priv->regmap, UB960_SR_RESET, v,
+ (v & bit) == 0, 2000, 100000);
+
+ mutex_unlock(&priv->reg_lock);
+
+ if (ret)
+ dev_err(dev, "reset failed: %d\n", ret);
+}
+
+static int ub960_get_hw_resources(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ priv->regmap = devm_regmap_init_i2c(priv->client, &ub960_regmap_config);
+ if (IS_ERR(priv->regmap))
+ return PTR_ERR(priv->regmap);
+
+ priv->vddio = devm_regulator_get(dev, "vddio");
+ if (IS_ERR(priv->vddio)) {
+ dev_err(dev, "cannot get VDDIO regulator\n");
+ return PTR_ERR(priv->vddio);
+ }
+
+ /* get power-down pin from DT */
+ priv->pd_gpio =
+ devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH);
+ if (IS_ERR(priv->pd_gpio)) {
+ ret = PTR_ERR(priv->pd_gpio);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Cannot get powerdown GPIO (%d)", ret);
+ return ret;
+ }
+
+ priv->refclk = devm_clk_get(dev, "refclk");
+ if (IS_ERR(priv->refclk)) {
+ ret = PTR_ERR(priv->refclk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Cannot get REFCLK (%d)", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ub960_enable_core_hw(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ u8 rev_mask;
+ int ret;
+ u8 dev_sts;
+ u8 refclk_freq;
+
+ ret = regulator_enable(priv->vddio);
+ if (ret) {
+ dev_err(dev, "failed to enable VDDIO regulator\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(priv->refclk);
+ if (ret) {
+ dev_err(dev, "Failed to renable refclk: %d\n", ret);
+ goto err_disable_vddio;
+ }
+
+ if (priv->pd_gpio) {
+ gpiod_set_value_cansleep(priv->pd_gpio, 1);
+ /* wait min 2 ms for reset to complete */
+ usleep_range(2000, 5000);
+ gpiod_set_value_cansleep(priv->pd_gpio, 0);
+ /* wait min 2 ms for power up to finish */
+ usleep_range(2000, 5000);
+ }
+
+ ub960_reset(priv, true);
+
+ /* Runtime check register accessibility */
+ ret = ub960_read(priv, UB960_SR_REV_MASK, &rev_mask);
+ if (ret) {
+ dev_err(dev, "Cannot read first register (%d), abort\n", ret);
+ goto err_pd_gpio;
+ }
+
+ dev_dbg(dev, "Found %s (rev/mask %#04x)\n", priv->hw_data->model,
+ rev_mask);
+
+ ret = ub960_read(priv, UB960_SR_DEVICE_STS, &dev_sts);
+ if (ret)
+ goto err_pd_gpio;
+
+ ret = ub960_read(priv, UB960_XR_REFCLK_FREQ, &refclk_freq);
+ if (ret)
+ goto err_pd_gpio;
+
+ dev_dbg(dev, "refclk valid %u freq %u MHz (clk fw freq %lu MHz)\n",
+ !!(dev_sts & BIT(4)), refclk_freq,
+ clk_get_rate(priv->refclk) / 1000000);
+
+ /* Disable all RX ports by default */
+ ub960_write(priv, UB960_SR_RX_PORT_CTL, 0);
+
+ return 0;
+
+err_pd_gpio:
+ if (priv->pd_gpio)
+ gpiod_set_value_cansleep(priv->pd_gpio, 1);
+
+ clk_disable_unprepare(priv->refclk);
+err_disable_vddio:
+ regulator_disable(priv->vddio);
+
+ return ret;
+}
+
+static void ub960_disable_core_hw(struct ub960_data *priv)
+{
+ if (priv->pd_gpio)
+ gpiod_set_value_cansleep(priv->pd_gpio, 1);
+
+ clk_disable_unprepare(priv->refclk);
+
+ regulator_disable(priv->vddio);
+}
+
+static int ub960_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ub960_data *priv;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->client = client;
+
+ priv->hw_data = of_device_get_match_data(dev);
+ if (!priv->hw_data)
+ return -ENODEV;
+
+ mutex_init(&priv->reg_lock);
+ mutex_init(&priv->atr_alias_table.lock);
+
+ INIT_DELAYED_WORK(&priv->poll_work, ub960_handler_work);
+
+ /*
+ * Initialize these to invalid values so that the first reg writes will
+ * configure the target.
+ */
+ priv->current_indirect_target = 0xff;
+ priv->current_read_rxport = 0xff;
+ priv->current_write_rxport_mask = 0xff;
+ priv->current_read_csiport = 0xff;
+ priv->current_write_csiport_mask = 0xff;
+
+ ret = ub960_get_hw_resources(priv);
+ if (ret)
+ goto err_mutex_destroy;
+
+ ret = ub960_enable_core_hw(priv);
+ if (ret)
+ goto err_mutex_destroy;
+
+ /* release GPIO lock */
+ if (priv->hw_data->ub9702)
+ ub960_update_bits(priv, UB960_SR_RESET,
+ UB960_SR_RESET_GPIO_LOCK_RELEASE,
+ UB960_SR_RESET_GPIO_LOCK_RELEASE);
+
+ ret = ub960_parse_dt(priv);
+ if (ret)
+ goto err_disable_core_hw;
+
+ ret = ub960_init_tx_ports(priv);
+ if (ret)
+ goto err_free_ports;
+
+ ret = ub960_rxport_enable_vpocs(priv);
+ if (ret)
+ goto err_free_ports;
+
+ ret = ub960_init_rx_ports(priv);
+ if (ret)
+ goto err_disable_vpocs;
+
+ ub960_reset(priv, false);
+
+ ub960_rxport_wait_locks(priv, 0xf, NULL);
+
+ /*
+ * Clear any errors caused by switching the RX port settings while
+ * probing.
+ */
+ ub960_clear_rx_errors(priv);
+
+ ret = ub960_init_atr(priv);
+ if (ret)
+ goto err_disable_vpocs;
+
+ ret = ub960_rxport_add_serializers(priv);
+ if (ret)
+ goto err_uninit_atr;
+
+ ret = ub960_create_subdev(priv);
+ if (ret)
+ goto err_free_sers;
+
+ if (client->irq)
+ dev_warn(dev, "irq support not implemented, using polling\n");
+
+ schedule_delayed_work(&priv->poll_work,
+ msecs_to_jiffies(UB960_POLL_TIME_MS));
+
+ return 0;
+
+err_free_sers:
+ ub960_rxport_remove_serializers(priv);
+err_uninit_atr:
+ ub960_uninit_atr(priv);
+err_disable_vpocs:
+ ub960_rxport_disable_vpocs(priv);
+err_free_ports:
+ ub960_rxport_free_ports(priv);
+ ub960_txport_free_ports(priv);
+err_disable_core_hw:
+ ub960_disable_core_hw(priv);
+err_mutex_destroy:
+ mutex_destroy(&priv->atr_alias_table.lock);
+ mutex_destroy(&priv->reg_lock);
+ return ret;
+}
+
+static void ub960_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ub960_data *priv = sd_to_ub960(sd);
+
+ cancel_delayed_work_sync(&priv->poll_work);
+
+ ub960_destroy_subdev(priv);
+ ub960_rxport_remove_serializers(priv);
+ ub960_uninit_atr(priv);
+ ub960_rxport_disable_vpocs(priv);
+ ub960_rxport_free_ports(priv);
+ ub960_txport_free_ports(priv);
+ ub960_disable_core_hw(priv);
+ mutex_destroy(&priv->atr_alias_table.lock);
+ mutex_destroy(&priv->reg_lock);
+}
+
+static const struct ub960_hw_data ds90ub960_hw = {
+ .model = "ub960",
+ .num_rxports = 4,
+ .num_txports = 2,
+};
+
+static const struct ub960_hw_data ds90ub9702_hw = {
+ .model = "ub9702",
+ .num_rxports = 4,
+ .num_txports = 2,
+ .ub9702 = true,
+ .fpdlink4 = true,
+};
+
+static const struct i2c_device_id ub960_id[] = {
+ { "ds90ub960-q1", 0 },
+ { "ds90ub9702-q1", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ub960_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id ub960_dt_ids[] = {
+ { .compatible = "ti,ds90ub960-q1", .data = &ds90ub960_hw },
+ { .compatible = "ti,ds90ub9702-q1", .data = &ds90ub9702_hw },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ub960_dt_ids);
+#endif
+
+static struct i2c_driver ds90ub960_driver = {
+ .probe_new = ub960_probe,
+ .remove = ub960_remove,
+ .id_table = ub960_id,
+ .driver = {
+ .name = "ds90ub960",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(ub960_dt_ids),
+ },
+};
+
+module_i2c_driver(ds90ub960_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Texas Instruments DS90UB960-Q1 FPD-Link deserializer driver");
+MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
+MODULE_IMPORT_NS(I2C_ATR);
diff --git a/include/media/i2c/ds90ub9xx.h b/include/media/i2c/ds90ub9xx.h
new file mode 100644
index 000000000000..42d47d732c03
--- /dev/null
+++ b/include/media/i2c/ds90ub9xx.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __MEDIA_I2C_DS90UB9XX_H__
+#define __MEDIA_I2C_DS90UB9XX_H__
+
+#include <linux/types.h>
+
+struct i2c_atr;
+
+struct ds90ub9xx_platform_data {
+ u32 port;
+ struct i2c_atr *atr;
+ unsigned long bc_rate;
+};
+
+#endif /* __MEDIA_I2C_DS90UB9XX_H__ */
--
2.34.1
^ permalink raw reply related [flat|nested] 33+ messages in thread* [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-05 14:02 [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
` (5 preceding siblings ...)
2023-01-05 14:03 ` [PATCH v6 6/8] media: i2c: add DS90UB960 driver Tomi Valkeinen
@ 2023-01-05 14:03 ` Tomi Valkeinen
2023-01-08 4:06 ` Laurent Pinchart
2023-01-05 14:03 ` [PATCH v6 8/8] media: i2c: add DS90UB953 driver Tomi Valkeinen
2023-01-05 14:05 ` [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
8 siblings, 1 reply; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-05 14:03 UTC (permalink / raw)
To: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen
Cc: Mauro Carvalho Chehab, Peter Rosin, Liam Girdwood, Mark Brown,
Sakari Ailus, Laurent Pinchart, Michael Tretter, Shawn Tu,
Hans Verkuil, Mike Pagano, Krzysztof Hałasa, Marek Vasut,
Tomi Valkeinen
Add driver for TI DS90UB913 FPD-Link III Serializer.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
drivers/media/i2c/Kconfig | 13 +
drivers/media/i2c/Makefile | 2 +-
drivers/media/i2c/ds90ub913.c | 871 ++++++++++++++++++++++++++++++++++
3 files changed, 885 insertions(+), 1 deletion(-)
create mode 100644 drivers/media/i2c/ds90ub913.c
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index f95a54454e17..eb312d6e9cf6 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -1601,6 +1601,19 @@ endmenu
menu "Video serializers and deserializers"
+config VIDEO_DS90UB913
+ tristate "TI DS90UB913 Serializer"
+ depends on OF && I2C && VIDEO_DEV
+ select MEDIA_CONTROLLER
+ select VIDEO_V4L2_SUBDEV_API
+ select V4L2_FWNODE
+ select REGMAP_I2C
+ select OF_GPIO
+ select I2C_ATR
+ help
+ Device driver for the Texas Instruments DS90UB913
+ FPD-Link III Serializer.
+
config VIDEO_DS90UB960
tristate "TI DS90UB960 Deserializer"
depends on OF && I2C && VIDEO_DEV
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 2735b00437bb..c4875ec8c3b9 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -142,5 +142,5 @@ obj-$(CONFIG_VIDEO_VPX3220) += vpx3220.o
obj-$(CONFIG_VIDEO_VS6624) += vs6624.o
obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
+obj-$(CONFIG_VIDEO_DS90UB913) += ds90ub913.o
obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
-
diff --git a/drivers/media/i2c/ds90ub913.c b/drivers/media/i2c/ds90ub913.c
new file mode 100644
index 000000000000..0a60afb09cd3
--- /dev/null
+++ b/drivers/media/i2c/ds90ub913.c
@@ -0,0 +1,871 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for the Texas Instruments DS90UB913 video serializer
+ *
+ * Based on a driver from Luca Ceresoli <luca@lucaceresoli.net>
+ *
+ * Copyright (c) 2019 Luca Ceresoli <luca@lucaceresoli.net>
+ * Copyright (c) 2022 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/driver.h>
+#include <linux/i2c-atr.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/regmap.h>
+
+#include <media/i2c/ds90ub9xx.h>
+#include <media/v4l2-subdev.h>
+
+#define UB913_PAD_SINK 0
+#define UB913_PAD_SOURCE 1
+
+/*
+ * UB913 has 4 gpios, but gpios 3 and 4 are reserved for external oscillator
+ * mode. Thus we only support 2 gpios for now.
+ */
+#define UB913_NUM_GPIOS 2
+
+#define UB913_REG_RESET_CTL 0x01
+#define UB913_REG_RESET_CTL_DIGITAL_RESET_1 BIT(1)
+#define UB913_REG_RESET_CTL_DIGITAL_RESET_0 BIT(0)
+
+#define UB913_REG_GENERAL_CFG 0x03
+#define UB913_REG_GENERAL_CFG_CRC_ERR_RESET BIT(5)
+#define UB913_REG_GENERAL_CFG_PCLK_RISING BIT(0)
+
+#define UB913_REG_MODE_SEL 0x05
+#define UB913_REG_MODE_SEL_MODE_UP_TO_DATE BIT(4)
+#define UB913_REG_MODE_SEL_MODE_OVERRIDE BIT(5)
+
+#define UB913_REG_CRC_ERRORS_LSB 0x0a
+#define UB913_REG_CRC_ERRORS_MSB 0x0b
+
+#define UB913_REG_GENERAL_STATUS 0x0c
+
+#define UB913_REG_GPIO_CFG(n) (0x0d + (n))
+#define UB913_REG_GPIO_CFG_ENABLE(n) BIT(0 + (n) * 4)
+#define UB913_REG_GPIO_CFG_DIR_INPUT(n) BIT(1 + (n) * 4)
+#define UB913_REG_GPIO_CFG_REMOTE_EN(n) BIT(2 + (n) * 4)
+#define UB913_REG_GPIO_CFG_OUT_VAL(n) BIT(3 + (n) * 4)
+#define UB913_REG_GPIO_CFG_MASK(n) (0xf << ((n) * 4))
+
+#define UB913_REG_SCL_HIGH_TIME 0x11
+#define UB913_REG_SCL_LOW_TIME 0x12
+
+#define UB913_REG_PLL_OVR 0x35
+
+struct ub913_data {
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct clk *clkin;
+
+ struct gpio_chip gpio_chip;
+ char gpio_chip_name[64];
+
+ struct v4l2_subdev sd;
+ struct media_pad pads[2];
+
+ struct v4l2_async_notifier notifier;
+
+ struct v4l2_subdev *source_sd;
+
+ u64 enabled_source_streams;
+
+ struct device_node *tx_ep_np;
+
+ struct clk_hw *clkout_clk_hw;
+
+ struct ds90ub9xx_platform_data *plat_data;
+
+ u32 pclk_polarity;
+};
+
+static inline struct ub913_data *sd_to_ub913(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct ub913_data, sd);
+}
+
+static int ub913_read(const struct ub913_data *priv, u8 reg, u8 *val)
+{
+ unsigned int v;
+ int ret;
+
+ ret = regmap_read(priv->regmap, reg, &v);
+ if (ret < 0) {
+ dev_err(&priv->client->dev,
+ "Cannot read register 0x%02x: %d!\n", reg, ret);
+ return ret;
+ }
+
+ *val = v;
+ return 0;
+}
+
+static int ub913_write(const struct ub913_data *priv, u8 reg, u8 val)
+{
+ int ret;
+
+ ret = regmap_write(priv->regmap, reg, val);
+ if (ret < 0)
+ dev_err(&priv->client->dev,
+ "Cannot write register 0x%02x: %d!\n", reg, ret);
+
+ return ret;
+}
+
+/*
+ * GPIO chip
+ */
+static int ub913_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
+{
+ return GPIO_LINE_DIRECTION_OUT;
+}
+
+static int ub913_gpio_direction_out(struct gpio_chip *gc, unsigned int offset,
+ int value)
+{
+ struct ub913_data *priv = gpiochip_get_data(gc);
+ unsigned int reg_idx;
+ unsigned int field_idx;
+ int ret;
+
+ reg_idx = offset / 2;
+ field_idx = offset % 2;
+
+ ret = regmap_update_bits(
+ priv->regmap, UB913_REG_GPIO_CFG(reg_idx),
+ UB913_REG_GPIO_CFG_MASK(field_idx),
+ UB913_REG_GPIO_CFG_ENABLE(field_idx) |
+ (value ? UB913_REG_GPIO_CFG_OUT_VAL(field_idx) : 0));
+
+ return ret;
+}
+
+static void ub913_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
+{
+ ub913_gpio_direction_out(gc, offset, value);
+}
+
+static int ub913_gpio_of_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec,
+ u32 *flags)
+{
+ if (flags)
+ *flags = gpiospec->args[1];
+
+ return gpiospec->args[0];
+}
+
+static int ub913_gpiochip_probe(struct ub913_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct gpio_chip *gc = &priv->gpio_chip;
+ int ret;
+
+ /* Initialize GPIOs 0 and 1 to local control, tri-state */
+ ub913_write(priv, UB913_REG_GPIO_CFG(0), 0);
+
+ scnprintf(priv->gpio_chip_name, sizeof(priv->gpio_chip_name), "%s",
+ dev_name(dev));
+
+ gc->label = priv->gpio_chip_name;
+ gc->parent = dev;
+ gc->owner = THIS_MODULE;
+ gc->base = -1;
+ gc->can_sleep = 1;
+ gc->ngpio = UB913_NUM_GPIOS;
+ gc->get_direction = ub913_gpio_get_direction;
+ gc->direction_output = ub913_gpio_direction_out;
+ gc->set = ub913_gpio_set;
+ gc->of_xlate = ub913_gpio_of_xlate;
+ gc->of_node = priv->client->dev.of_node;
+ gc->of_gpio_n_cells = 2;
+
+ ret = gpiochip_add_data(gc, priv);
+ if (ret) {
+ dev_err(dev, "Failed to add GPIOs: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ub913_gpiochip_remove(struct ub913_data *priv)
+{
+ gpiochip_remove(&priv->gpio_chip);
+}
+
+static const struct regmap_config ub913_regmap_config = {
+ .name = "ds90ub913",
+ .reg_bits = 8,
+ .val_bits = 8,
+ .reg_format_endian = REGMAP_ENDIAN_DEFAULT,
+ .val_format_endian = REGMAP_ENDIAN_DEFAULT,
+};
+
+/*
+ * V4L2
+ */
+
+static int ub913_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct ub913_data *priv = sd_to_ub913(sd);
+ struct media_pad *remote_pad;
+ u64 sink_streams;
+ int ret;
+
+ if (streams_mask & priv->enabled_source_streams)
+ return -EALREADY;
+
+ sink_streams = v4l2_subdev_state_xlate_streams(
+ state, UB913_PAD_SOURCE, UB913_PAD_SINK, &streams_mask);
+
+ remote_pad = media_pad_remote_pad_first(&priv->pads[UB913_PAD_SINK]);
+
+ ret = v4l2_subdev_enable_streams(priv->source_sd, remote_pad->index,
+ sink_streams);
+ if (ret)
+ return ret;
+
+ priv->enabled_source_streams |= streams_mask;
+
+ return 0;
+}
+
+static int ub913_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct ub913_data *priv = sd_to_ub913(sd);
+ struct media_pad *remote_pad;
+ int ret;
+ u64 sink_streams;
+
+ if ((streams_mask & priv->enabled_source_streams) != streams_mask)
+ return -EALREADY;
+
+ sink_streams = v4l2_subdev_state_xlate_streams(
+ state, UB913_PAD_SOURCE, UB913_PAD_SINK, &streams_mask);
+
+ remote_pad = media_pad_remote_pad_first(&priv->pads[UB913_PAD_SINK]);
+
+ ret = v4l2_subdev_disable_streams(priv->source_sd, remote_pad->index,
+ sink_streams);
+ if (ret)
+ return ret;
+
+ priv->enabled_source_streams &= ~streams_mask;
+
+ return 0;
+}
+
+static int _ub913_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_krouting *routing)
+{
+ static const struct v4l2_mbus_framefmt format = {
+ .width = 640,
+ .height = 480,
+ .code = MEDIA_BUS_FMT_UYVY8_2X8,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .ycbcr_enc = V4L2_YCBCR_ENC_601,
+ .quantization = V4L2_QUANTIZATION_LIM_RANGE,
+ .xfer_func = V4L2_XFER_FUNC_SRGB,
+ };
+ int ret;
+
+ /*
+ * Note: we can only support up to V4L2_FRAME_DESC_ENTRY_MAX, until
+ * frame desc is made dynamically allocated.
+ */
+
+ if (routing->num_routes > V4L2_FRAME_DESC_ENTRY_MAX)
+ return -EINVAL;
+
+ ret = v4l2_subdev_routing_validate(sd, routing,
+ V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
+ if (ret)
+ return ret;
+
+ ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ub913_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ enum v4l2_subdev_format_whence which,
+ struct v4l2_subdev_krouting *routing)
+{
+ struct ub913_data *priv = sd_to_ub913(sd);
+
+ if (which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->enabled_source_streams)
+ return -EBUSY;
+
+ return _ub913_set_routing(sd, state, routing);
+}
+
+static int ub913_get_source_frame_desc(struct ub913_data *priv,
+ struct v4l2_mbus_frame_desc *desc)
+{
+ struct media_pad *pad;
+ int ret;
+
+ pad = media_pad_remote_pad_first(&priv->pads[UB913_PAD_SINK]);
+ if (!pad)
+ return -EPIPE;
+
+ ret = v4l2_subdev_call(priv->source_sd, pad, get_frame_desc, pad->index,
+ desc);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ub913_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+ struct v4l2_mbus_frame_desc *fd)
+{
+ struct ub913_data *priv = sd_to_ub913(sd);
+ const struct v4l2_subdev_krouting *routing;
+ struct v4l2_mbus_frame_desc source_fd;
+ struct v4l2_subdev_route *route;
+ struct v4l2_subdev_state *state;
+ int ret;
+
+ if (pad != UB913_PAD_SOURCE)
+ return -EINVAL;
+
+ ret = ub913_get_source_frame_desc(priv, &source_fd);
+ if (ret)
+ return ret;
+
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ routing = &state->routing;
+
+ memset(fd, 0, sizeof(*fd));
+
+ fd->type = V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL;
+
+ for_each_active_route(routing, route) {
+ unsigned int i;
+
+ if (route->source_pad != pad)
+ continue;
+
+ for (i = 0; i < source_fd.num_entries; ++i)
+ if (source_fd.entry[i].stream == route->sink_stream)
+ break;
+
+ if (i == source_fd.num_entries) {
+ dev_err(&priv->client->dev,
+ "Failed to find stream from source frame desc\n");
+ ret = -EPIPE;
+ goto out;
+ }
+
+ fd->entry[fd->num_entries].stream = route->source_stream;
+ fd->entry[fd->num_entries].flags = source_fd.entry[i].flags;
+ fd->entry[fd->num_entries].length = source_fd.entry[i].length;
+ fd->entry[fd->num_entries].pixelcode =
+ source_fd.entry[i].pixelcode;
+
+ fd->num_entries++;
+ }
+
+out:
+ v4l2_subdev_unlock_state(state);
+
+ return ret;
+}
+
+static int ub913_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *format)
+{
+ struct ub913_data *priv = sd_to_ub913(sd);
+ struct v4l2_mbus_framefmt *fmt;
+
+ if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE &&
+ priv->enabled_source_streams)
+ return -EBUSY;
+
+ /* No transcoding, source and sink formats must match. */
+ if (format->pad == UB913_PAD_SOURCE)
+ return v4l2_subdev_get_fmt(sd, state, format);
+
+ /* Set sink format */
+ fmt = v4l2_subdev_state_get_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = format->format;
+
+ /* Propagate to source format */
+ fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = format->format;
+
+ return 0;
+}
+
+static int ub913_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ struct v4l2_subdev_route routes[] = {
+ {
+ .sink_pad = UB913_PAD_SINK,
+ .sink_stream = 0,
+ .source_pad = UB913_PAD_SOURCE,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ };
+
+ struct v4l2_subdev_krouting routing = {
+ .num_routes = ARRAY_SIZE(routes),
+ .routes = routes,
+ };
+
+ return _ub913_set_routing(sd, state, &routing);
+}
+
+static int ub913_log_status(struct v4l2_subdev *sd)
+{
+ struct ub913_data *priv = sd_to_ub913(sd);
+ struct device *dev = &priv->client->dev;
+ u8 v, v1, v2;
+
+ ub913_read(priv, UB913_REG_MODE_SEL, &v);
+ dev_info(dev, "MODE_SEL %#x\n", v);
+
+ ub913_read(priv, UB913_REG_CRC_ERRORS_LSB, &v1);
+ ub913_read(priv, UB913_REG_CRC_ERRORS_MSB, &v2);
+ dev_info(dev, "CRC errors %u\n", v1 | (v2 << 8));
+
+ ub913_read(priv, UB913_REG_GENERAL_STATUS, &v);
+ dev_info(dev, "GENERAL_STATUS %#x\n", v);
+
+ ub913_read(priv, UB913_REG_PLL_OVR, &v);
+ dev_info(dev, "PLL_OVR %#x\n", v);
+
+ /* clear CRC errors */
+ ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
+ ub913_write(priv, UB913_REG_GENERAL_CFG, v | UB913_REG_GENERAL_CFG_CRC_ERR_RESET);
+ ub913_write(priv, UB913_REG_GENERAL_CFG, v);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops ub913_subdev_core_ops = {
+ .log_status = ub913_log_status,
+};
+
+static const struct v4l2_subdev_pad_ops ub913_pad_ops = {
+ .enable_streams = ub913_enable_streams,
+ .disable_streams = ub913_disable_streams,
+ .set_routing = ub913_set_routing,
+ .get_frame_desc = ub913_get_frame_desc,
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = ub913_set_fmt,
+ .init_cfg = ub913_init_cfg,
+};
+
+static const struct v4l2_subdev_ops ub913_subdev_ops = {
+ .core = &ub913_subdev_core_ops,
+ .pad = &ub913_pad_ops,
+};
+
+static const struct media_entity_operations ub913_entity_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static int ub913_notify_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *source_subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct ub913_data *priv = sd_to_ub913(notifier->sd);
+ struct device *dev = &priv->client->dev;
+ unsigned int src_pad;
+ int ret;
+
+ ret = media_entity_get_fwnode_pad(&source_subdev->entity,
+ source_subdev->fwnode,
+ MEDIA_PAD_FL_SOURCE);
+ if (ret < 0) {
+ dev_err(dev, "Failed to find pad for %s\n",
+ source_subdev->name);
+ return ret;
+ }
+
+ priv->source_sd = source_subdev;
+ src_pad = ret;
+
+ ret = media_create_pad_link(&source_subdev->entity, src_pad,
+ &priv->sd.entity, UB913_PAD_SINK,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (ret) {
+ dev_err(dev, "Unable to link %s:%u -> %s:0\n",
+ source_subdev->name, src_pad, priv->sd.name);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_async_notifier_operations ub913_notify_ops = {
+ .bound = ub913_notify_bound,
+};
+
+static int ub913_v4l2_notifier_register(struct ub913_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct v4l2_async_subdev *asd;
+ struct device_node *ep_node;
+ int ret;
+
+ ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
+ if (!ep_node) {
+ dev_err(dev, "No graph endpoint\n");
+ return -ENODEV;
+ }
+
+ v4l2_async_nf_init(&priv->notifier);
+
+ asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier,
+ of_fwnode_handle(ep_node),
+ struct v4l2_async_subdev);
+
+ of_node_put(ep_node);
+
+ if (IS_ERR(asd)) {
+ dev_err(dev, "Failed to add subdev: %ld", PTR_ERR(asd));
+ v4l2_async_nf_cleanup(&priv->notifier);
+ return PTR_ERR(asd);
+ }
+
+ priv->notifier.ops = &ub913_notify_ops;
+
+ ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier);
+ if (ret) {
+ dev_err(dev, "Failed to register subdev_notifier");
+ v4l2_async_nf_cleanup(&priv->notifier);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ub913_v4l2_nf_unregister(struct ub913_data *priv)
+{
+ v4l2_async_nf_unregister(&priv->notifier);
+ v4l2_async_nf_cleanup(&priv->notifier);
+}
+
+static int ub913_register_clkout(struct ub913_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ const char *name;
+ int ret;
+
+ name = kasprintf(GFP_KERNEL, "ds90ub913.%s.clk_out", dev_name(dev));
+
+ priv->clkout_clk_hw = devm_clk_hw_register_fixed_factor(dev, name,
+ __clk_get_name(priv->clkin), 0, 1, 2);
+
+ kfree(name);
+
+ if (IS_ERR(priv->clkout_clk_hw))
+ return dev_err_probe(dev, PTR_ERR(priv->clkout_clk_hw),
+ "Cannot register clkout hw\n");
+
+ ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,
+ priv->clkout_clk_hw);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Cannot add OF clock provider\n");
+
+ return 0;
+}
+
+static int ub913_i2c_master_init(struct ub913_data *priv)
+{
+ /* i2c fast mode */
+ u32 scl_high = 600 + 300; /* high period + rise time, ns */
+ u32 scl_low = 1300 + 300; /* low period + fall time, ns */
+ unsigned long ref;
+ int ret;
+
+ ref = clk_get_rate(priv->clkin) / 2;
+
+ scl_high = div64_u64((u64)scl_high * ref, 1000000000);
+ scl_low = div64_u64((u64)scl_low * ref, 1000000000);
+
+ ret = ub913_write(priv, UB913_REG_SCL_HIGH_TIME, scl_high);
+ if (ret)
+ return ret;
+
+ ret = ub913_write(priv, UB913_REG_SCL_LOW_TIME, scl_low);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ub913_add_i2c_adapter(struct ub913_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct fwnode_handle *i2c_handle;
+ int ret;
+
+ i2c_handle = device_get_named_child_node(dev, "i2c");
+ if (!i2c_handle)
+ return 0;
+
+ ret = i2c_atr_add_adapter(priv->plat_data->atr, priv->plat_data->port,
+ i2c_handle);
+
+ fwnode_handle_put(i2c_handle);
+
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ub913_parse_dt(struct ub913_data *priv)
+{
+ struct device_node *np = priv->client->dev.of_node;
+ struct device *dev = &priv->client->dev;
+ int ret;
+ struct device_node *ep_np;
+
+ if (!np) {
+ dev_err(dev, "OF: no device tree node!\n");
+ return -ENOENT;
+ }
+
+ ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
+ if (!ep_np) {
+ dev_err(dev, "OF: no endpoint\n");
+ return -ENOENT;
+ }
+
+ ret = of_property_read_u32(ep_np, "pclk-sample", &priv->pclk_polarity);
+
+ of_node_put(ep_np);
+
+ if (ret) {
+ dev_err(dev, "OF: failed to parse pclk-sample: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ub913_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ub913_data *priv;
+ int ret;
+ u8 v;
+ bool mode_override;
+ u8 mode;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->client = client;
+
+ priv->plat_data = dev_get_platdata(&client->dev);
+ if (!priv->plat_data) {
+ dev_err(dev, "Platform data missing\n");
+ return -ENODEV;
+ }
+
+ priv->regmap = devm_regmap_init_i2c(client, &ub913_regmap_config);
+ if (IS_ERR(priv->regmap)) {
+ dev_err(dev, "Failed to init regmap\n");
+ return PTR_ERR(priv->regmap);
+ }
+
+ /* ub913 can also work without ext clock, but that is not supported */
+ priv->clkin = devm_clk_get(dev, "clkin");
+ if (IS_ERR(priv->clkin)) {
+ ret = PTR_ERR(priv->clkin);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Cannot get CLKIN (%d)", ret);
+ return ret;
+ }
+
+ ret = ub913_parse_dt(priv);
+ if (ret)
+ return ret;
+
+ ret = ub913_read(priv, UB913_REG_MODE_SEL, &v);
+ if (ret)
+ return ret;
+
+ if (!(v & UB913_REG_MODE_SEL_MODE_UP_TO_DATE)) {
+ dev_err(dev, "Mode value not stabilized\n");
+ return -ENODEV;
+ }
+
+ mode_override = v & UB913_REG_MODE_SEL_MODE_OVERRIDE;
+ mode = v & 0xf;
+
+ dev_dbg(dev, "mode from %s: %#x\n",
+ mode_override ? "reg" : "deserializer", mode);
+
+ ret = ub913_i2c_master_init(priv);
+ if (ret) {
+ dev_err(dev, "i2c master init failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = ub913_gpiochip_probe(priv);
+ if (ret) {
+ dev_err(dev, "Failed to init gpiochip\n");
+ return ret;
+ }
+
+ ret = ub913_register_clkout(priv);
+ if (ret) {
+ dev_err(dev, "Failed to register clkout\n");
+ goto err_gpiochip_remove;
+ }
+
+ ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
+ v &= ~UB913_REG_GENERAL_CFG_PCLK_RISING;
+ v |= priv->pclk_polarity ? UB913_REG_GENERAL_CFG_PCLK_RISING : 0;
+ ub913_write(priv, UB913_REG_GENERAL_CFG, v);
+
+ v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub913_subdev_ops);
+ priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
+ priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ priv->sd.entity.ops = &ub913_entity_ops;
+
+ priv->pads[0].flags = MEDIA_PAD_FL_SINK;
+ priv->pads[1].flags = MEDIA_PAD_FL_SOURCE;
+
+ ret = media_entity_pads_init(&priv->sd.entity, 2, priv->pads);
+ if (ret) {
+ dev_err(dev, "Failed to init pads\n");
+ goto err_gpiochip_remove;
+ }
+
+ priv->tx_ep_np = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
+ if (priv->tx_ep_np)
+ priv->sd.fwnode = of_fwnode_handle(priv->tx_ep_np);
+
+ ret = v4l2_subdev_init_finalize(&priv->sd);
+ if (ret)
+ goto err_entity_cleanup;
+
+ ret = ub913_v4l2_notifier_register(priv);
+ if (ret) {
+ dev_err(dev, "v4l2 subdev notifier register failed: %d\n", ret);
+ goto err_free_state;
+ }
+
+ ret = v4l2_async_register_subdev(&priv->sd);
+ if (ret) {
+ dev_err(dev, "v4l2_async_register_subdev error: %d\n", ret);
+ goto err_unreg_notif;
+ }
+
+ ret = ub913_add_i2c_adapter(priv);
+ if (ret) {
+ dev_err(dev, "failed to add remote i2c adapter\n");
+ goto err_unreg_async_subdev;
+ }
+
+ return 0;
+
+err_unreg_async_subdev:
+ v4l2_async_unregister_subdev(&priv->sd);
+err_unreg_notif:
+ ub913_v4l2_nf_unregister(priv);
+err_free_state:
+ v4l2_subdev_cleanup(&priv->sd);
+err_entity_cleanup:
+ if (priv->tx_ep_np)
+ of_node_put(priv->tx_ep_np);
+
+ media_entity_cleanup(&priv->sd.entity);
+err_gpiochip_remove:
+ ub913_gpiochip_remove(priv);
+
+ return ret;
+}
+
+static void ub913_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ub913_data *priv = sd_to_ub913(sd);
+
+ i2c_atr_del_adapter(priv->plat_data->atr,
+ priv->plat_data->port);
+
+ v4l2_async_unregister_subdev(&priv->sd);
+
+ ub913_v4l2_nf_unregister(priv);
+
+ v4l2_subdev_cleanup(&priv->sd);
+
+ if (priv->tx_ep_np)
+ of_node_put(priv->tx_ep_np);
+
+ media_entity_cleanup(&priv->sd.entity);
+
+ ub913_gpiochip_remove(priv);
+}
+
+static const struct i2c_device_id ub913_id[] = { { "ds90ub913a-q1", 0 }, {} };
+MODULE_DEVICE_TABLE(i2c, ub913_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id ub913_dt_ids[] = {
+ { .compatible = "ti,ds90ub913a-q1", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ub913_dt_ids);
+#endif
+
+static struct i2c_driver ds90ub913_driver = {
+ .probe_new = ub913_probe,
+ .remove = ub913_remove,
+ .id_table = ub913_id,
+ .driver = {
+ .name = "ds90ub913a",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(ub913_dt_ids),
+ },
+};
+
+module_i2c_driver(ds90ub913_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Texas Instruments DS90UB913 serializer driver");
+MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
+MODULE_IMPORT_NS(I2C_ATR);
--
2.34.1
^ permalink raw reply related [flat|nested] 33+ messages in thread* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-05 14:03 ` [PATCH v6 7/8] media: i2c: add DS90UB913 driver Tomi Valkeinen
@ 2023-01-08 4:06 ` Laurent Pinchart
2023-01-09 9:40 ` Tomi Valkeinen
2023-01-09 11:07 ` Andy Shevchenko
0 siblings, 2 replies; 33+ messages in thread
From: Laurent Pinchart @ 2023-01-08 4:06 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
Hi Tomi,
Thank you for the patch.
On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
> Add driver for TI DS90UB913 FPD-Link III Serializer.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> ---
> drivers/media/i2c/Kconfig | 13 +
> drivers/media/i2c/Makefile | 2 +-
> drivers/media/i2c/ds90ub913.c | 871 ++++++++++++++++++++++++++++++++++
> 3 files changed, 885 insertions(+), 1 deletion(-)
> create mode 100644 drivers/media/i2c/ds90ub913.c
>
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index f95a54454e17..eb312d6e9cf6 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -1601,6 +1601,19 @@ endmenu
>
> menu "Video serializers and deserializers"
>
> +config VIDEO_DS90UB913
> + tristate "TI DS90UB913 Serializer"
> + depends on OF && I2C && VIDEO_DEV
> + select MEDIA_CONTROLLER
> + select VIDEO_V4L2_SUBDEV_API
> + select V4L2_FWNODE
> + select REGMAP_I2C
> + select OF_GPIO
> + select I2C_ATR
Maybe alphabetical order ?
> + help
> + Device driver for the Texas Instruments DS90UB913
> + FPD-Link III Serializer.
> +
> config VIDEO_DS90UB960
> tristate "TI DS90UB960 Deserializer"
> depends on OF && I2C && VIDEO_DEV
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index 2735b00437bb..c4875ec8c3b9 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -142,5 +142,5 @@ obj-$(CONFIG_VIDEO_VPX3220) += vpx3220.o
> obj-$(CONFIG_VIDEO_VS6624) += vs6624.o
> obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
> obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
> +obj-$(CONFIG_VIDEO_DS90UB913) += ds90ub913.o
> obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
> -
Don't add the blank line in 6/8 if you remove it here :-)
> diff --git a/drivers/media/i2c/ds90ub913.c b/drivers/media/i2c/ds90ub913.c
> new file mode 100644
> index 000000000000..0a60afb09cd3
> --- /dev/null
> +++ b/drivers/media/i2c/ds90ub913.c
> @@ -0,0 +1,871 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for the Texas Instruments DS90UB913 video serializer
> + *
> + * Based on a driver from Luca Ceresoli <luca@lucaceresoli.net>
> + *
> + * Copyright (c) 2019 Luca Ceresoli <luca@lucaceresoli.net>
> + * Copyright (c) 2022 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Happy new year :-)
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/gpio/driver.h>
> +#include <linux/i2c-atr.h>
> +#include <linux/i2c.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_graph.h>
> +#include <linux/regmap.h>
> +
> +#include <media/i2c/ds90ub9xx.h>
> +#include <media/v4l2-subdev.h>
> +
> +#define UB913_PAD_SINK 0
> +#define UB913_PAD_SOURCE 1
> +
> +/*
> + * UB913 has 4 gpios, but gpios 3 and 4 are reserved for external oscillator
> + * mode. Thus we only support 2 gpios for now.
> + */
> +#define UB913_NUM_GPIOS 2
> +
> +#define UB913_REG_RESET_CTL 0x01
> +#define UB913_REG_RESET_CTL_DIGITAL_RESET_1 BIT(1)
> +#define UB913_REG_RESET_CTL_DIGITAL_RESET_0 BIT(0)
> +
> +#define UB913_REG_GENERAL_CFG 0x03
> +#define UB913_REG_GENERAL_CFG_CRC_ERR_RESET BIT(5)
> +#define UB913_REG_GENERAL_CFG_PCLK_RISING BIT(0)
> +
> +#define UB913_REG_MODE_SEL 0x05
> +#define UB913_REG_MODE_SEL_MODE_UP_TO_DATE BIT(4)
> +#define UB913_REG_MODE_SEL_MODE_OVERRIDE BIT(5)
> +
> +#define UB913_REG_CRC_ERRORS_LSB 0x0a
> +#define UB913_REG_CRC_ERRORS_MSB 0x0b
> +
> +#define UB913_REG_GENERAL_STATUS 0x0c
> +
> +#define UB913_REG_GPIO_CFG(n) (0x0d + (n))
> +#define UB913_REG_GPIO_CFG_ENABLE(n) BIT(0 + (n) * 4)
> +#define UB913_REG_GPIO_CFG_DIR_INPUT(n) BIT(1 + (n) * 4)
> +#define UB913_REG_GPIO_CFG_REMOTE_EN(n) BIT(2 + (n) * 4)
> +#define UB913_REG_GPIO_CFG_OUT_VAL(n) BIT(3 + (n) * 4)
> +#define UB913_REG_GPIO_CFG_MASK(n) (0xf << ((n) * 4))
> +
> +#define UB913_REG_SCL_HIGH_TIME 0x11
> +#define UB913_REG_SCL_LOW_TIME 0x12
> +
> +#define UB913_REG_PLL_OVR 0x35
> +
> +struct ub913_data {
> + struct i2c_client *client;
> + struct regmap *regmap;
> + struct clk *clkin;
> +
> + struct gpio_chip gpio_chip;
> + char gpio_chip_name[64];
> +
> + struct v4l2_subdev sd;
> + struct media_pad pads[2];
> +
> + struct v4l2_async_notifier notifier;
> +
> + struct v4l2_subdev *source_sd;
> +
> + u64 enabled_source_streams;
> +
> + struct device_node *tx_ep_np;
> +
> + struct clk_hw *clkout_clk_hw;
> +
> + struct ds90ub9xx_platform_data *plat_data;
> +
> + u32 pclk_polarity;
> +};
> +
> +static inline struct ub913_data *sd_to_ub913(struct v4l2_subdev *sd)
> +{
> + return container_of(sd, struct ub913_data, sd);
> +}
> +
> +static int ub913_read(const struct ub913_data *priv, u8 reg, u8 *val)
> +{
> + unsigned int v;
> + int ret;
> +
> + ret = regmap_read(priv->regmap, reg, &v);
> + if (ret < 0) {
> + dev_err(&priv->client->dev,
> + "Cannot read register 0x%02x: %d!\n", reg, ret);
> + return ret;
> + }
> +
> + *val = v;
> + return 0;
> +}
> +
> +static int ub913_write(const struct ub913_data *priv, u8 reg, u8 val)
> +{
> + int ret;
> +
> + ret = regmap_write(priv->regmap, reg, val);
> + if (ret < 0)
> + dev_err(&priv->client->dev,
> + "Cannot write register 0x%02x: %d!\n", reg, ret);
> +
> + return ret;
> +}
> +
> +/*
> + * GPIO chip
> + */
> +static int ub913_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
> +{
> + return GPIO_LINE_DIRECTION_OUT;
> +}
> +
> +static int ub913_gpio_direction_out(struct gpio_chip *gc, unsigned int offset,
> + int value)
> +{
> + struct ub913_data *priv = gpiochip_get_data(gc);
> + unsigned int reg_idx;
> + unsigned int field_idx;
> + int ret;
> +
> + reg_idx = offset / 2;
> + field_idx = offset % 2;
You could initialize those two variables when declaring them, up to you.
> +
> + ret = regmap_update_bits(
> + priv->regmap, UB913_REG_GPIO_CFG(reg_idx),
> + UB913_REG_GPIO_CFG_MASK(field_idx),
> + UB913_REG_GPIO_CFG_ENABLE(field_idx) |
> + (value ? UB913_REG_GPIO_CFG_OUT_VAL(field_idx) : 0));
> +
> + return ret;
No need for a ret variable, you can write
return regmap_update_bits(priv->regmap, UB913_REG_GPIO_CFG(reg_idx),
UB913_REG_GPIO_CFG_MASK(field_idx),
UB913_REG_GPIO_CFG_ENABLE(field_idx) |
(value ? UB913_REG_GPIO_CFG_OUT_VAL(field_idx) : 0));
> +}
> +
> +static void ub913_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
> +{
> + ub913_gpio_direction_out(gc, offset, value);
> +}
> +
> +static int ub913_gpio_of_xlate(struct gpio_chip *gc,
> + const struct of_phandle_args *gpiospec,
> + u32 *flags)
> +{
> + if (flags)
> + *flags = gpiospec->args[1];
> +
> + return gpiospec->args[0];
> +}
> +
> +static int ub913_gpiochip_probe(struct ub913_data *priv)
> +{
> + struct device *dev = &priv->client->dev;
> + struct gpio_chip *gc = &priv->gpio_chip;
> + int ret;
> +
> + /* Initialize GPIOs 0 and 1 to local control, tri-state */
> + ub913_write(priv, UB913_REG_GPIO_CFG(0), 0);
> +
> + scnprintf(priv->gpio_chip_name, sizeof(priv->gpio_chip_name), "%s",
> + dev_name(dev));
I think you can use strscpy().
> +
> + gc->label = priv->gpio_chip_name;
> + gc->parent = dev;
> + gc->owner = THIS_MODULE;
> + gc->base = -1;
> + gc->can_sleep = 1;
can_sleep is a bool,
gc->can_sleep = true;
> + gc->ngpio = UB913_NUM_GPIOS;
> + gc->get_direction = ub913_gpio_get_direction;
> + gc->direction_output = ub913_gpio_direction_out;
> + gc->set = ub913_gpio_set;
> + gc->of_xlate = ub913_gpio_of_xlate;
> + gc->of_node = priv->client->dev.of_node;
> + gc->of_gpio_n_cells = 2;
> +
> + ret = gpiochip_add_data(gc, priv);
> + if (ret) {
> + dev_err(dev, "Failed to add GPIOs: %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static void ub913_gpiochip_remove(struct ub913_data *priv)
> +{
> + gpiochip_remove(&priv->gpio_chip);
> +}
> +
> +static const struct regmap_config ub913_regmap_config = {
> + .name = "ds90ub913",
> + .reg_bits = 8,
> + .val_bits = 8,
> + .reg_format_endian = REGMAP_ENDIAN_DEFAULT,
> + .val_format_endian = REGMAP_ENDIAN_DEFAULT,
> +};
> +
> +/*
> + * V4L2
> + */
> +
> +static int ub913_enable_streams(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state, u32 pad,
> + u64 streams_mask)
> +{
> + struct ub913_data *priv = sd_to_ub913(sd);
> + struct media_pad *remote_pad;
> + u64 sink_streams;
> + int ret;
> +
> + if (streams_mask & priv->enabled_source_streams)
> + return -EALREADY;
I may recall incorrectly, but doesn't the subdev core already prevent
this from happening ?
> +
> + sink_streams = v4l2_subdev_state_xlate_streams(
> + state, UB913_PAD_SOURCE, UB913_PAD_SINK, &streams_mask);
> +
> + remote_pad = media_pad_remote_pad_first(&priv->pads[UB913_PAD_SINK]);
As the remote pad should never change, how about caching it in the
ub913_data structrue at probe time and using it here and in other
functions below ? You already cache the source subdev.
> +
> + ret = v4l2_subdev_enable_streams(priv->source_sd, remote_pad->index,
> + sink_streams);
> + if (ret)
> + return ret;
> +
> + priv->enabled_source_streams |= streams_mask;
> +
> + return 0;
> +}
> +
> +static int ub913_disable_streams(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state, u32 pad,
> + u64 streams_mask)
> +{
> + struct ub913_data *priv = sd_to_ub913(sd);
> + struct media_pad *remote_pad;
> + int ret;
> + u64 sink_streams;
Swap ret and sink_streams.
> +
> + if ((streams_mask & priv->enabled_source_streams) != streams_mask)
> + return -EALREADY;
> +
> + sink_streams = v4l2_subdev_state_xlate_streams(
> + state, UB913_PAD_SOURCE, UB913_PAD_SINK, &streams_mask);
> +
> + remote_pad = media_pad_remote_pad_first(&priv->pads[UB913_PAD_SINK]);
> +
> + ret = v4l2_subdev_disable_streams(priv->source_sd, remote_pad->index,
> + sink_streams);
> + if (ret)
> + return ret;
> +
> + priv->enabled_source_streams &= ~streams_mask;
> +
> + return 0;
> +}
> +
> +static int _ub913_set_routing(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_krouting *routing)
> +{
> + static const struct v4l2_mbus_framefmt format = {
> + .width = 640,
> + .height = 480,
> + .code = MEDIA_BUS_FMT_UYVY8_2X8,
> + .field = V4L2_FIELD_NONE,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + .ycbcr_enc = V4L2_YCBCR_ENC_601,
> + .quantization = V4L2_QUANTIZATION_LIM_RANGE,
> + .xfer_func = V4L2_XFER_FUNC_SRGB,
> + };
> + int ret;
> +
> + /*
> + * Note: we can only support up to V4L2_FRAME_DESC_ENTRY_MAX, until
> + * frame desc is made dynamically allocated.
> + */
> +
> + if (routing->num_routes > V4L2_FRAME_DESC_ENTRY_MAX)
> + return -EINVAL;
> +
> + ret = v4l2_subdev_routing_validate(sd, routing,
> + V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
> + if (ret)
> + return ret;
> +
> + ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int ub913_set_routing(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + enum v4l2_subdev_format_whence which,
> + struct v4l2_subdev_krouting *routing)
> +{
> + struct ub913_data *priv = sd_to_ub913(sd);
> +
> + if (which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->enabled_source_streams)
> + return -EBUSY;
> +
> + return _ub913_set_routing(sd, state, routing);
> +}
> +
> +static int ub913_get_source_frame_desc(struct ub913_data *priv,
> + struct v4l2_mbus_frame_desc *desc)
> +{
> + struct media_pad *pad;
> + int ret;
> +
> + pad = media_pad_remote_pad_first(&priv->pads[UB913_PAD_SINK]);
> + if (!pad)
> + return -EPIPE;
> +
> + ret = v4l2_subdev_call(priv->source_sd, pad, get_frame_desc, pad->index,
> + desc);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int ub913_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
> + struct v4l2_mbus_frame_desc *fd)
> +{
> + struct ub913_data *priv = sd_to_ub913(sd);
> + const struct v4l2_subdev_krouting *routing;
> + struct v4l2_mbus_frame_desc source_fd;
> + struct v4l2_subdev_route *route;
> + struct v4l2_subdev_state *state;
> + int ret;
> +
> + if (pad != UB913_PAD_SOURCE)
> + return -EINVAL;
> +
> + ret = ub913_get_source_frame_desc(priv, &source_fd);
> + if (ret)
> + return ret;
> +
> + state = v4l2_subdev_lock_and_get_active_state(sd);
> +
> + routing = &state->routing;
> +
> + memset(fd, 0, sizeof(*fd));
> +
> + fd->type = V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL;
These two lines can be moved up, before locking the state.
> +
> + for_each_active_route(routing, route) {
> + unsigned int i;
> +
> + if (route->source_pad != pad)
> + continue;
> +
> + for (i = 0; i < source_fd.num_entries; ++i)
Curly braces.
> + if (source_fd.entry[i].stream == route->sink_stream)
> + break;
> +
> + if (i == source_fd.num_entries) {
> + dev_err(&priv->client->dev,
> + "Failed to find stream from source frame desc\n");
> + ret = -EPIPE;
> + goto out;
> + }
> +
> + fd->entry[fd->num_entries].stream = route->source_stream;
> + fd->entry[fd->num_entries].flags = source_fd.entry[i].flags;
> + fd->entry[fd->num_entries].length = source_fd.entry[i].length;
> + fd->entry[fd->num_entries].pixelcode =
> + source_fd.entry[i].pixelcode;
> +
> + fd->num_entries++;
Looks like we'll need helpers to simplify implementation of
.get_frame_desc(). Not a candidate for this series.
> + }
> +
> +out:
> + v4l2_subdev_unlock_state(state);
> +
> + return ret;
> +}
> +
> +static int ub913_set_fmt(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_format *format)
> +{
> + struct ub913_data *priv = sd_to_ub913(sd);
> + struct v4l2_mbus_framefmt *fmt;
> +
> + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE &&
> + priv->enabled_source_streams)
> + return -EBUSY;
> +
> + /* No transcoding, source and sink formats must match. */
> + if (format->pad == UB913_PAD_SOURCE)
> + return v4l2_subdev_get_fmt(sd, state, format);
> +
> + /* Set sink format */
> + fmt = v4l2_subdev_state_get_stream_format(state, format->pad,
> + format->stream);
> + if (!fmt)
> + return -EINVAL;
> +
> + *fmt = format->format;
> +
> + /* Propagate to source format */
> + fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
> + format->stream);
> + if (!fmt)
> + return -EINVAL;
> +
> + *fmt = format->format;
> +
> + return 0;
> +}
> +
> +static int ub913_init_cfg(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state)
> +{
> + struct v4l2_subdev_route routes[] = {
> + {
> + .sink_pad = UB913_PAD_SINK,
> + .sink_stream = 0,
> + .source_pad = UB913_PAD_SOURCE,
> + .source_stream = 0,
> + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
> + },
> + };
> +
> + struct v4l2_subdev_krouting routing = {
> + .num_routes = ARRAY_SIZE(routes),
> + .routes = routes,
> + };
> +
> + return _ub913_set_routing(sd, state, &routing);
> +}
> +
> +static int ub913_log_status(struct v4l2_subdev *sd)
> +{
> + struct ub913_data *priv = sd_to_ub913(sd);
> + struct device *dev = &priv->client->dev;
> + u8 v, v1, v2;
> +
> + ub913_read(priv, UB913_REG_MODE_SEL, &v);
> + dev_info(dev, "MODE_SEL %#x\n", v);
%#02x ? Same below.
> +
> + ub913_read(priv, UB913_REG_CRC_ERRORS_LSB, &v1);
> + ub913_read(priv, UB913_REG_CRC_ERRORS_MSB, &v2);
Looks racy, but if it's for debugging only, I suppose it's fine.
> + dev_info(dev, "CRC errors %u\n", v1 | (v2 << 8));
> +
> + ub913_read(priv, UB913_REG_GENERAL_STATUS, &v);
> + dev_info(dev, "GENERAL_STATUS %#x\n", v);
> +
> + ub913_read(priv, UB913_REG_PLL_OVR, &v);
> + dev_info(dev, "PLL_OVR %#x\n", v);
> +
> + /* clear CRC errors */
> + ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
> + ub913_write(priv, UB913_REG_GENERAL_CFG, v | UB913_REG_GENERAL_CFG_CRC_ERR_RESET);
Line wrap.
> + ub913_write(priv, UB913_REG_GENERAL_CFG, v);
Move this just after reading the number of CRC errors to avoid dropping
some errors.
> +
> + return 0;
> +}
> +
> +static const struct v4l2_subdev_core_ops ub913_subdev_core_ops = {
> + .log_status = ub913_log_status,
> +};
> +
> +static const struct v4l2_subdev_pad_ops ub913_pad_ops = {
> + .enable_streams = ub913_enable_streams,
> + .disable_streams = ub913_disable_streams,
> + .set_routing = ub913_set_routing,
> + .get_frame_desc = ub913_get_frame_desc,
> + .get_fmt = v4l2_subdev_get_fmt,
> + .set_fmt = ub913_set_fmt,
> + .init_cfg = ub913_init_cfg,
> +};
> +
> +static const struct v4l2_subdev_ops ub913_subdev_ops = {
> + .core = &ub913_subdev_core_ops,
> + .pad = &ub913_pad_ops,
> +};
> +
> +static const struct media_entity_operations ub913_entity_ops = {
> + .link_validate = v4l2_subdev_link_validate,
> +};
> +
> +static int ub913_notify_bound(struct v4l2_async_notifier *notifier,
> + struct v4l2_subdev *source_subdev,
> + struct v4l2_async_subdev *asd)
> +{
> + struct ub913_data *priv = sd_to_ub913(notifier->sd);
> + struct device *dev = &priv->client->dev;
> + unsigned int src_pad;
> + int ret;
> +
> + ret = media_entity_get_fwnode_pad(&source_subdev->entity,
> + source_subdev->fwnode,
> + MEDIA_PAD_FL_SOURCE);
> + if (ret < 0) {
> + dev_err(dev, "Failed to find pad for %s\n",
> + source_subdev->name);
> + return ret;
> + }
> +
> + priv->source_sd = source_subdev;
> + src_pad = ret;
> +
> + ret = media_create_pad_link(&source_subdev->entity, src_pad,
> + &priv->sd.entity, UB913_PAD_SINK,
> + MEDIA_LNK_FL_ENABLED |
> + MEDIA_LNK_FL_IMMUTABLE);
> + if (ret) {
> + dev_err(dev, "Unable to link %s:%u -> %s:0\n",
> + source_subdev->name, src_pad, priv->sd.name);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static const struct v4l2_async_notifier_operations ub913_notify_ops = {
> + .bound = ub913_notify_bound,
> +};
> +
> +static int ub913_v4l2_notifier_register(struct ub913_data *priv)
> +{
> + struct device *dev = &priv->client->dev;
> + struct v4l2_async_subdev *asd;
> + struct device_node *ep_node;
> + int ret;
> +
> + ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
> + if (!ep_node) {
> + dev_err(dev, "No graph endpoint\n");
> + return -ENODEV;
> + }
> +
> + v4l2_async_nf_init(&priv->notifier);
> +
> + asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier,
> + of_fwnode_handle(ep_node),
> + struct v4l2_async_subdev);
> +
> + of_node_put(ep_node);
> +
> + if (IS_ERR(asd)) {
> + dev_err(dev, "Failed to add subdev: %ld", PTR_ERR(asd));
> + v4l2_async_nf_cleanup(&priv->notifier);
> + return PTR_ERR(asd);
> + }
> +
> + priv->notifier.ops = &ub913_notify_ops;
> +
> + ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier);
> + if (ret) {
> + dev_err(dev, "Failed to register subdev_notifier");
> + v4l2_async_nf_cleanup(&priv->notifier);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static void ub913_v4l2_nf_unregister(struct ub913_data *priv)
> +{
> + v4l2_async_nf_unregister(&priv->notifier);
> + v4l2_async_nf_cleanup(&priv->notifier);
> +}
> +
> +static int ub913_register_clkout(struct ub913_data *priv)
> +{
> + struct device *dev = &priv->client->dev;
> + const char *name;
> + int ret;
> +
> + name = kasprintf(GFP_KERNEL, "ds90ub913.%s.clk_out", dev_name(dev));
if (!name)
return -ENOMEM;
> +
> + priv->clkout_clk_hw = devm_clk_hw_register_fixed_factor(dev, name,
> + __clk_get_name(priv->clkin), 0, 1, 2);
> +
> + kfree(name);
> +
> + if (IS_ERR(priv->clkout_clk_hw))
> + return dev_err_probe(dev, PTR_ERR(priv->clkout_clk_hw),
> + "Cannot register clkout hw\n");
> +
> + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,
> + priv->clkout_clk_hw);
> + if (ret)
> + return dev_err_probe(dev, ret,
> + "Cannot add OF clock provider\n");
> +
> + return 0;
> +}
> +
> +static int ub913_i2c_master_init(struct ub913_data *priv)
> +{
> + /* i2c fast mode */
> + u32 scl_high = 600 + 300; /* high period + rise time, ns */
> + u32 scl_low = 1300 + 300; /* low period + fall time, ns */
> + unsigned long ref;
> + int ret;
> +
> + ref = clk_get_rate(priv->clkin) / 2;
> +
> + scl_high = div64_u64((u64)scl_high * ref, 1000000000);
> + scl_low = div64_u64((u64)scl_low * ref, 1000000000);
> +
> + ret = ub913_write(priv, UB913_REG_SCL_HIGH_TIME, scl_high);
> + if (ret)
> + return ret;
> +
> + ret = ub913_write(priv, UB913_REG_SCL_LOW_TIME, scl_low);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int ub913_add_i2c_adapter(struct ub913_data *priv)
> +{
> + struct device *dev = &priv->client->dev;
> + struct fwnode_handle *i2c_handle;
> + int ret;
> +
> + i2c_handle = device_get_named_child_node(dev, "i2c");
> + if (!i2c_handle)
> + return 0;
> +
> + ret = i2c_atr_add_adapter(priv->plat_data->atr, priv->plat_data->port,
> + i2c_handle);
> +
> + fwnode_handle_put(i2c_handle);
> +
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int ub913_parse_dt(struct ub913_data *priv)
> +{
> + struct device_node *np = priv->client->dev.of_node;
> + struct device *dev = &priv->client->dev;
> + int ret;
> + struct device_node *ep_np;
Swap ret and ep_np.
> +
> + if (!np) {
> + dev_err(dev, "OF: no device tree node!\n");
> + return -ENOENT;
> + }
Can this happen ?
> +
> + ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
> + if (!ep_np) {
> + dev_err(dev, "OF: no endpoint\n");
> + return -ENOENT;
> + }
> +
> + ret = of_property_read_u32(ep_np, "pclk-sample", &priv->pclk_polarity);
> +
> + of_node_put(ep_np);
> +
> + if (ret) {
> + dev_err(dev, "OF: failed to parse pclk-sample: %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int ub913_probe(struct i2c_client *client)
> +{
> + struct device *dev = &client->dev;
> + struct ub913_data *priv;
> + int ret;
> + u8 v;
> + bool mode_override;
> + u8 mode;
> +
> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + priv->client = client;
> +
> + priv->plat_data = dev_get_platdata(&client->dev);
> + if (!priv->plat_data) {
> + dev_err(dev, "Platform data missing\n");
> + return -ENODEV;
> + }
> +
> + priv->regmap = devm_regmap_init_i2c(client, &ub913_regmap_config);
> + if (IS_ERR(priv->regmap)) {
> + dev_err(dev, "Failed to init regmap\n");
> + return PTR_ERR(priv->regmap);
> + }
> +
> + /* ub913 can also work without ext clock, but that is not supported */
Maybe "not supported by the driver yet." to make it clear it could be
added ?
> + priv->clkin = devm_clk_get(dev, "clkin");
> + if (IS_ERR(priv->clkin)) {
> + ret = PTR_ERR(priv->clkin);
> + if (ret != -EPROBE_DEFER)
> + dev_err(dev, "Cannot get CLKIN (%d)", ret);
Use dev_err_probe().
> + return ret;
> + }
> +
> + ret = ub913_parse_dt(priv);
> + if (ret)
> + return ret;
> +
> + ret = ub913_read(priv, UB913_REG_MODE_SEL, &v);
> + if (ret)
> + return ret;
> +
> + if (!(v & UB913_REG_MODE_SEL_MODE_UP_TO_DATE)) {
> + dev_err(dev, "Mode value not stabilized\n");
> + return -ENODEV;
> + }
> +
> + mode_override = v & UB913_REG_MODE_SEL_MODE_OVERRIDE;
> + mode = v & 0xf;
A macro for the 0xf would be nice.
> +
> + dev_dbg(dev, "mode from %s: %#x\n",
> + mode_override ? "reg" : "deserializer", mode);
> +
> + ret = ub913_i2c_master_init(priv);
> + if (ret) {
> + dev_err(dev, "i2c master init failed: %d\n", ret);
> + return ret;
> + }
> +
> + ret = ub913_gpiochip_probe(priv);
> + if (ret) {
> + dev_err(dev, "Failed to init gpiochip\n");
> + return ret;
> + }
> +
> + ret = ub913_register_clkout(priv);
> + if (ret) {
> + dev_err(dev, "Failed to register clkout\n");
> + goto err_gpiochip_remove;
> + }
> +
> + ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
> + v &= ~UB913_REG_GENERAL_CFG_PCLK_RISING;
> + v |= priv->pclk_polarity ? UB913_REG_GENERAL_CFG_PCLK_RISING : 0;
> + ub913_write(priv, UB913_REG_GENERAL_CFG, v);
We're completely missing power management, but I suppose that can be
done later.
Should this be grouped with the UB913_REG_MODE_SEL check above, and
maybe moved to a hardware init function ?
> +
> + v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub913_subdev_ops);
> + priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
> + priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
> + priv->sd.entity.ops = &ub913_entity_ops;
> +
> + priv->pads[0].flags = MEDIA_PAD_FL_SINK;
> + priv->pads[1].flags = MEDIA_PAD_FL_SOURCE;
> +
> + ret = media_entity_pads_init(&priv->sd.entity, 2, priv->pads);
> + if (ret) {
> + dev_err(dev, "Failed to init pads\n");
> + goto err_gpiochip_remove;
> + }
> +
> + priv->tx_ep_np = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
> + if (priv->tx_ep_np)
> + priv->sd.fwnode = of_fwnode_handle(priv->tx_ep_np);
Can we meaningfully continue with tx_ep_np is NULL, or should that be an
error ?
> +
> + ret = v4l2_subdev_init_finalize(&priv->sd);
> + if (ret)
> + goto err_entity_cleanup;
> +
> + ret = ub913_v4l2_notifier_register(priv);
> + if (ret) {
> + dev_err(dev, "v4l2 subdev notifier register failed: %d\n", ret);
> + goto err_free_state;
> + }
> +
> + ret = v4l2_async_register_subdev(&priv->sd);
> + if (ret) {
> + dev_err(dev, "v4l2_async_register_subdev error: %d\n", ret);
> + goto err_unreg_notif;
> + }
> +
> + ret = ub913_add_i2c_adapter(priv);
> + if (ret) {
> + dev_err(dev, "failed to add remote i2c adapter\n");
> + goto err_unreg_async_subdev;
> + }
> +
> + return 0;
> +
> +err_unreg_async_subdev:
> + v4l2_async_unregister_subdev(&priv->sd);
> +err_unreg_notif:
> + ub913_v4l2_nf_unregister(priv);
> +err_free_state:
I'd name this err_subdev_cleanup.
> + v4l2_subdev_cleanup(&priv->sd);
> +err_entity_cleanup:
> + if (priv->tx_ep_np)
> + of_node_put(priv->tx_ep_np);
of_node_put() is a no-op when called with NULL, you can drop the check.
Same below.
> +
> + media_entity_cleanup(&priv->sd.entity);
> +err_gpiochip_remove:
> + ub913_gpiochip_remove(priv);
> +
> + return ret;
> +}
> +
> +static void ub913_remove(struct i2c_client *client)
> +{
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct ub913_data *priv = sd_to_ub913(sd);
> +
> + i2c_atr_del_adapter(priv->plat_data->atr,
> + priv->plat_data->port);
> +
> + v4l2_async_unregister_subdev(&priv->sd);
> +
> + ub913_v4l2_nf_unregister(priv);
> +
> + v4l2_subdev_cleanup(&priv->sd);
> +
> + if (priv->tx_ep_np)
> + of_node_put(priv->tx_ep_np);
> +
> + media_entity_cleanup(&priv->sd.entity);
> +
> + ub913_gpiochip_remove(priv);
> +}
> +
> +static const struct i2c_device_id ub913_id[] = { { "ds90ub913a-q1", 0 }, {} };
> +MODULE_DEVICE_TABLE(i2c, ub913_id);
> +
> +#ifdef CONFIG_OF
The driver depends on CONFIG_OF so I would drop this, as well as the
of_match_ptr().
> +static const struct of_device_id ub913_dt_ids[] = {
> + { .compatible = "ti,ds90ub913a-q1", },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, ub913_dt_ids);
> +#endif
> +
> +static struct i2c_driver ds90ub913_driver = {
> + .probe_new = ub913_probe,
> + .remove = ub913_remove,
> + .id_table = ub913_id,
> + .driver = {
> + .name = "ds90ub913a",
> + .owner = THIS_MODULE,
> + .of_match_table = of_match_ptr(ub913_dt_ids),
> + },
> +};
> +
> +module_i2c_driver(ds90ub913_driver);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("Texas Instruments DS90UB913 serializer driver");
> +MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
> +MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
> +MODULE_IMPORT_NS(I2C_ATR);
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-08 4:06 ` Laurent Pinchart
@ 2023-01-09 9:40 ` Tomi Valkeinen
2023-01-09 9:56 ` Laurent Pinchart
2023-01-09 11:07 ` Andy Shevchenko
1 sibling, 1 reply; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-09 9:40 UTC (permalink / raw)
To: Laurent Pinchart
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
On 08/01/2023 06:06, Laurent Pinchart wrote:
> Hi Tomi,
>
> Thank you for the patch.
>
> On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
>> Add driver for TI DS90UB913 FPD-Link III Serializer.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
>> ---
>> drivers/media/i2c/Kconfig | 13 +
>> drivers/media/i2c/Makefile | 2 +-
>> drivers/media/i2c/ds90ub913.c | 871 ++++++++++++++++++++++++++++++++++
>> 3 files changed, 885 insertions(+), 1 deletion(-)
>> create mode 100644 drivers/media/i2c/ds90ub913.c
>>
>> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
>> index f95a54454e17..eb312d6e9cf6 100644
>> --- a/drivers/media/i2c/Kconfig
>> +++ b/drivers/media/i2c/Kconfig
>> @@ -1601,6 +1601,19 @@ endmenu
>>
>> menu "Video serializers and deserializers"
>>
>> +config VIDEO_DS90UB913
>> + tristate "TI DS90UB913 Serializer"
>> + depends on OF && I2C && VIDEO_DEV
>> + select MEDIA_CONTROLLER
>> + select VIDEO_V4L2_SUBDEV_API
>> + select V4L2_FWNODE
>> + select REGMAP_I2C
>> + select OF_GPIO
>> + select I2C_ATR
>
> Maybe alphabetical order ?
Sure.
>> + help
>> + Device driver for the Texas Instruments DS90UB913
>> + FPD-Link III Serializer.
>> +
>> config VIDEO_DS90UB960
>> tristate "TI DS90UB960 Deserializer"
>> depends on OF && I2C && VIDEO_DEV
>> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
>> index 2735b00437bb..c4875ec8c3b9 100644
>> --- a/drivers/media/i2c/Makefile
>> +++ b/drivers/media/i2c/Makefile
>> @@ -142,5 +142,5 @@ obj-$(CONFIG_VIDEO_VPX3220) += vpx3220.o
>> obj-$(CONFIG_VIDEO_VS6624) += vs6624.o
>> obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
>> obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
>> +obj-$(CONFIG_VIDEO_DS90UB913) += ds90ub913.o
>> obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
>> -
>
> Don't add the blank line in 6/8 if you remove it here :-)
Okay =).
>> diff --git a/drivers/media/i2c/ds90ub913.c b/drivers/media/i2c/ds90ub913.c
>> new file mode 100644
>> index 000000000000..0a60afb09cd3
>> --- /dev/null
>> +++ b/drivers/media/i2c/ds90ub913.c
>> @@ -0,0 +1,871 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Driver for the Texas Instruments DS90UB913 video serializer
>> + *
>> + * Based on a driver from Luca Ceresoli <luca@lucaceresoli.net>
>> + *
>> + * Copyright (c) 2019 Luca Ceresoli <luca@lucaceresoli.net>
>> + * Copyright (c) 2022 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
>
> Happy new year :-)
Again? Time flies...
>> + */
>> +
>> +#include <linux/clk-provider.h>
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/gpio/driver.h>
>> +#include <linux/i2c-atr.h>
>> +#include <linux/i2c.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_graph.h>
>> +#include <linux/regmap.h>
>> +
>> +#include <media/i2c/ds90ub9xx.h>
>> +#include <media/v4l2-subdev.h>
>> +
>> +#define UB913_PAD_SINK 0
>> +#define UB913_PAD_SOURCE 1
>> +
>> +/*
>> + * UB913 has 4 gpios, but gpios 3 and 4 are reserved for external oscillator
>> + * mode. Thus we only support 2 gpios for now.
>> + */
>> +#define UB913_NUM_GPIOS 2
>> +
>> +#define UB913_REG_RESET_CTL 0x01
>> +#define UB913_REG_RESET_CTL_DIGITAL_RESET_1 BIT(1)
>> +#define UB913_REG_RESET_CTL_DIGITAL_RESET_0 BIT(0)
>> +
>> +#define UB913_REG_GENERAL_CFG 0x03
>> +#define UB913_REG_GENERAL_CFG_CRC_ERR_RESET BIT(5)
>> +#define UB913_REG_GENERAL_CFG_PCLK_RISING BIT(0)
>> +
>> +#define UB913_REG_MODE_SEL 0x05
>> +#define UB913_REG_MODE_SEL_MODE_UP_TO_DATE BIT(4)
>> +#define UB913_REG_MODE_SEL_MODE_OVERRIDE BIT(5)
>> +
>> +#define UB913_REG_CRC_ERRORS_LSB 0x0a
>> +#define UB913_REG_CRC_ERRORS_MSB 0x0b
>> +
>> +#define UB913_REG_GENERAL_STATUS 0x0c
>> +
>> +#define UB913_REG_GPIO_CFG(n) (0x0d + (n))
>> +#define UB913_REG_GPIO_CFG_ENABLE(n) BIT(0 + (n) * 4)
>> +#define UB913_REG_GPIO_CFG_DIR_INPUT(n) BIT(1 + (n) * 4)
>> +#define UB913_REG_GPIO_CFG_REMOTE_EN(n) BIT(2 + (n) * 4)
>> +#define UB913_REG_GPIO_CFG_OUT_VAL(n) BIT(3 + (n) * 4)
>> +#define UB913_REG_GPIO_CFG_MASK(n) (0xf << ((n) * 4))
>> +
>> +#define UB913_REG_SCL_HIGH_TIME 0x11
>> +#define UB913_REG_SCL_LOW_TIME 0x12
>> +
>> +#define UB913_REG_PLL_OVR 0x35
>> +
>> +struct ub913_data {
>> + struct i2c_client *client;
>> + struct regmap *regmap;
>> + struct clk *clkin;
>> +
>> + struct gpio_chip gpio_chip;
>> + char gpio_chip_name[64];
>> +
>> + struct v4l2_subdev sd;
>> + struct media_pad pads[2];
>> +
>> + struct v4l2_async_notifier notifier;
>> +
>> + struct v4l2_subdev *source_sd;
>> +
>> + u64 enabled_source_streams;
>> +
>> + struct device_node *tx_ep_np;
>> +
>> + struct clk_hw *clkout_clk_hw;
>> +
>> + struct ds90ub9xx_platform_data *plat_data;
>> +
>> + u32 pclk_polarity;
>> +};
>> +
>> +static inline struct ub913_data *sd_to_ub913(struct v4l2_subdev *sd)
>> +{
>> + return container_of(sd, struct ub913_data, sd);
>> +}
>> +
>> +static int ub913_read(const struct ub913_data *priv, u8 reg, u8 *val)
>> +{
>> + unsigned int v;
>> + int ret;
>> +
>> + ret = regmap_read(priv->regmap, reg, &v);
>> + if (ret < 0) {
>> + dev_err(&priv->client->dev,
>> + "Cannot read register 0x%02x: %d!\n", reg, ret);
>> + return ret;
>> + }
>> +
>> + *val = v;
>> + return 0;
>> +}
>> +
>> +static int ub913_write(const struct ub913_data *priv, u8 reg, u8 val)
>> +{
>> + int ret;
>> +
>> + ret = regmap_write(priv->regmap, reg, val);
>> + if (ret < 0)
>> + dev_err(&priv->client->dev,
>> + "Cannot write register 0x%02x: %d!\n", reg, ret);
>> +
>> + return ret;
>> +}
>> +
>> +/*
>> + * GPIO chip
>> + */
>> +static int ub913_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
>> +{
>> + return GPIO_LINE_DIRECTION_OUT;
>> +}
>> +
>> +static int ub913_gpio_direction_out(struct gpio_chip *gc, unsigned int offset,
>> + int value)
>> +{
>> + struct ub913_data *priv = gpiochip_get_data(gc);
>> + unsigned int reg_idx;
>> + unsigned int field_idx;
>> + int ret;
>> +
>> + reg_idx = offset / 2;
>> + field_idx = offset % 2;
>
> You could initialize those two variables when declaring them, up to you.
Ok.
>> +
>> + ret = regmap_update_bits(
>> + priv->regmap, UB913_REG_GPIO_CFG(reg_idx),
>> + UB913_REG_GPIO_CFG_MASK(field_idx),
>> + UB913_REG_GPIO_CFG_ENABLE(field_idx) |
>> + (value ? UB913_REG_GPIO_CFG_OUT_VAL(field_idx) : 0));
>> +
>> + return ret;
>
> No need for a ret variable, you can write
>
> return regmap_update_bits(priv->regmap, UB913_REG_GPIO_CFG(reg_idx),
> UB913_REG_GPIO_CFG_MASK(field_idx),
> UB913_REG_GPIO_CFG_ENABLE(field_idx) |
> (value ? UB913_REG_GPIO_CFG_OUT_VAL(field_idx) : 0));
Yep.
>> +}
>> +
>> +static void ub913_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
>> +{
>> + ub913_gpio_direction_out(gc, offset, value);
>> +}
>> +
>> +static int ub913_gpio_of_xlate(struct gpio_chip *gc,
>> + const struct of_phandle_args *gpiospec,
>> + u32 *flags)
>> +{
>> + if (flags)
>> + *flags = gpiospec->args[1];
>> +
>> + return gpiospec->args[0];
>> +}
>> +
>> +static int ub913_gpiochip_probe(struct ub913_data *priv)
>> +{
>> + struct device *dev = &priv->client->dev;
>> + struct gpio_chip *gc = &priv->gpio_chip;
>> + int ret;
>> +
>> + /* Initialize GPIOs 0 and 1 to local control, tri-state */
>> + ub913_write(priv, UB913_REG_GPIO_CFG(0), 0);
>> +
>> + scnprintf(priv->gpio_chip_name, sizeof(priv->gpio_chip_name), "%s",
>> + dev_name(dev));
>
> I think you can use strscpy().
Yep.
>> +
>> + gc->label = priv->gpio_chip_name;
>> + gc->parent = dev;
>> + gc->owner = THIS_MODULE;
>> + gc->base = -1;
>> + gc->can_sleep = 1;
>
> can_sleep is a bool,
>
> gc->can_sleep = true;
Right.
>> + gc->ngpio = UB913_NUM_GPIOS;
>> + gc->get_direction = ub913_gpio_get_direction;
>> + gc->direction_output = ub913_gpio_direction_out;
>> + gc->set = ub913_gpio_set;
>> + gc->of_xlate = ub913_gpio_of_xlate;
>> + gc->of_node = priv->client->dev.of_node;
>> + gc->of_gpio_n_cells = 2;
>> +
>> + ret = gpiochip_add_data(gc, priv);
>> + if (ret) {
>> + dev_err(dev, "Failed to add GPIOs: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static void ub913_gpiochip_remove(struct ub913_data *priv)
>> +{
>> + gpiochip_remove(&priv->gpio_chip);
>> +}
>> +
>> +static const struct regmap_config ub913_regmap_config = {
>> + .name = "ds90ub913",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> + .reg_format_endian = REGMAP_ENDIAN_DEFAULT,
>> + .val_format_endian = REGMAP_ENDIAN_DEFAULT,
>> +};
>> +
>> +/*
>> + * V4L2
>> + */
>> +
>> +static int ub913_enable_streams(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state, u32 pad,
>> + u64 streams_mask)
>> +{
>> + struct ub913_data *priv = sd_to_ub913(sd);
>> + struct media_pad *remote_pad;
>> + u64 sink_streams;
>> + int ret;
>> +
>> + if (streams_mask & priv->enabled_source_streams)
>> + return -EALREADY;
>
> I may recall incorrectly, but doesn't the subdev core already prevent
> this from happening ?
Indeed, it nowadays does.
We store the streaming enabled/disabled status per stream in
v4l2_subdev_stream_config, but I don't think there's an easy way for a
subdev driver to check if streaming in general is enabled. So I'll still
keep the priv->enabled_source_streams variable here. This is probably
something we might add to the core, although I it probably depends on
the driver whether it's interested in "is the device streaming" versus
"is this pad streaming".
>> +
>> + sink_streams = v4l2_subdev_state_xlate_streams(
>> + state, UB913_PAD_SOURCE, UB913_PAD_SINK, &streams_mask);
>> +
>> + remote_pad = media_pad_remote_pad_first(&priv->pads[UB913_PAD_SINK]);
>
> As the remote pad should never change, how about caching it in the
> ub913_data structrue at probe time and using it here and in other
> functions below ? You already cache the source subdev.
Yes, good idea, that allows me to drop multiple lines.
>> +
>> + ret = v4l2_subdev_enable_streams(priv->source_sd, remote_pad->index,
>> + sink_streams);
>> + if (ret)
>> + return ret;
>> +
>> + priv->enabled_source_streams |= streams_mask;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub913_disable_streams(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state, u32 pad,
>> + u64 streams_mask)
>> +{
>> + struct ub913_data *priv = sd_to_ub913(sd);
>> + struct media_pad *remote_pad;
>> + int ret;
>> + u64 sink_streams;
>
> Swap ret and sink_streams.
Yep.
>> +
>> + if ((streams_mask & priv->enabled_source_streams) != streams_mask)
>> + return -EALREADY;
>> +
>> + sink_streams = v4l2_subdev_state_xlate_streams(
>> + state, UB913_PAD_SOURCE, UB913_PAD_SINK, &streams_mask);
>> +
>> + remote_pad = media_pad_remote_pad_first(&priv->pads[UB913_PAD_SINK]);
>> +
>> + ret = v4l2_subdev_disable_streams(priv->source_sd, remote_pad->index,
>> + sink_streams);
>> + if (ret)
>> + return ret;
>> +
>> + priv->enabled_source_streams &= ~streams_mask;
>> +
>> + return 0;
>> +}
>> +
>> +static int _ub913_set_routing(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state,
>> + struct v4l2_subdev_krouting *routing)
>> +{
>> + static const struct v4l2_mbus_framefmt format = {
>> + .width = 640,
>> + .height = 480,
>> + .code = MEDIA_BUS_FMT_UYVY8_2X8,
>> + .field = V4L2_FIELD_NONE,
>> + .colorspace = V4L2_COLORSPACE_SRGB,
>> + .ycbcr_enc = V4L2_YCBCR_ENC_601,
>> + .quantization = V4L2_QUANTIZATION_LIM_RANGE,
>> + .xfer_func = V4L2_XFER_FUNC_SRGB,
>> + };
>> + int ret;
>> +
>> + /*
>> + * Note: we can only support up to V4L2_FRAME_DESC_ENTRY_MAX, until
>> + * frame desc is made dynamically allocated.
>> + */
>> +
>> + if (routing->num_routes > V4L2_FRAME_DESC_ENTRY_MAX)
>> + return -EINVAL;
>> +
>> + ret = v4l2_subdev_routing_validate(sd, routing,
>> + V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
>> + if (ret)
>> + return ret;
>> +
>> + ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub913_set_routing(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state,
>> + enum v4l2_subdev_format_whence which,
>> + struct v4l2_subdev_krouting *routing)
>> +{
>> + struct ub913_data *priv = sd_to_ub913(sd);
>> +
>> + if (which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->enabled_source_streams)
>> + return -EBUSY;
>> +
>> + return _ub913_set_routing(sd, state, routing);
>> +}
>> +
>> +static int ub913_get_source_frame_desc(struct ub913_data *priv,
>> + struct v4l2_mbus_frame_desc *desc)
>> +{
>> + struct media_pad *pad;
>> + int ret;
>> +
>> + pad = media_pad_remote_pad_first(&priv->pads[UB913_PAD_SINK]);
>> + if (!pad)
>> + return -EPIPE;
>> +
>> + ret = v4l2_subdev_call(priv->source_sd, pad, get_frame_desc, pad->index,
>> + desc);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub913_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
>> + struct v4l2_mbus_frame_desc *fd)
>> +{
>> + struct ub913_data *priv = sd_to_ub913(sd);
>> + const struct v4l2_subdev_krouting *routing;
>> + struct v4l2_mbus_frame_desc source_fd;
>> + struct v4l2_subdev_route *route;
>> + struct v4l2_subdev_state *state;
>> + int ret;
>> +
>> + if (pad != UB913_PAD_SOURCE)
>> + return -EINVAL;
>> +
>> + ret = ub913_get_source_frame_desc(priv, &source_fd);
>> + if (ret)
>> + return ret;
>> +
>> + state = v4l2_subdev_lock_and_get_active_state(sd);
>> +
>> + routing = &state->routing;
>> +
>> + memset(fd, 0, sizeof(*fd));
>> +
>> + fd->type = V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL;
>
> These two lines can be moved up, before locking the state.
Ok.
>> +
>> + for_each_active_route(routing, route) {
>> + unsigned int i;
>> +
>> + if (route->source_pad != pad)
>> + continue;
>> +
>> + for (i = 0; i < source_fd.num_entries; ++i)
>
> Curly braces.
Ok.
>> + if (source_fd.entry[i].stream == route->sink_stream)
>> + break;
>> +
>> + if (i == source_fd.num_entries) {
>> + dev_err(&priv->client->dev,
>> + "Failed to find stream from source frame desc\n");
>> + ret = -EPIPE;
>> + goto out;
>> + }
>> +
>> + fd->entry[fd->num_entries].stream = route->source_stream;
>> + fd->entry[fd->num_entries].flags = source_fd.entry[i].flags;
>> + fd->entry[fd->num_entries].length = source_fd.entry[i].length;
>> + fd->entry[fd->num_entries].pixelcode =
>> + source_fd.entry[i].pixelcode;
>> +
>> + fd->num_entries++;
>
> Looks like we'll need helpers to simplify implementation of
> .get_frame_desc(). Not a candidate for this series.
>
>> + }
>> +
>> +out:
>> + v4l2_subdev_unlock_state(state);
>> +
>> + return ret;
>> +}
>> +
>> +static int ub913_set_fmt(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state,
>> + struct v4l2_subdev_format *format)
>> +{
>> + struct ub913_data *priv = sd_to_ub913(sd);
>> + struct v4l2_mbus_framefmt *fmt;
>> +
>> + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE &&
>> + priv->enabled_source_streams)
>> + return -EBUSY;
>> +
>> + /* No transcoding, source and sink formats must match. */
>> + if (format->pad == UB913_PAD_SOURCE)
>> + return v4l2_subdev_get_fmt(sd, state, format);
>> +
>> + /* Set sink format */
>> + fmt = v4l2_subdev_state_get_stream_format(state, format->pad,
>> + format->stream);
>> + if (!fmt)
>> + return -EINVAL;
>> +
>> + *fmt = format->format;
>> +
>> + /* Propagate to source format */
>> + fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
>> + format->stream);
>> + if (!fmt)
>> + return -EINVAL;
>> +
>> + *fmt = format->format;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub913_init_cfg(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state)
>> +{
>> + struct v4l2_subdev_route routes[] = {
>> + {
>> + .sink_pad = UB913_PAD_SINK,
>> + .sink_stream = 0,
>> + .source_pad = UB913_PAD_SOURCE,
>> + .source_stream = 0,
>> + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
>> + },
>> + };
>> +
>> + struct v4l2_subdev_krouting routing = {
>> + .num_routes = ARRAY_SIZE(routes),
>> + .routes = routes,
>> + };
>> +
>> + return _ub913_set_routing(sd, state, &routing);
>> +}
>> +
>> +static int ub913_log_status(struct v4l2_subdev *sd)
>> +{
>> + struct ub913_data *priv = sd_to_ub913(sd);
>> + struct device *dev = &priv->client->dev;
>> + u8 v, v1, v2;
>> +
>> + ub913_read(priv, UB913_REG_MODE_SEL, &v);
>> + dev_info(dev, "MODE_SEL %#x\n", v);
>
> %#02x ? Same below.
Ok.
>> +
>> + ub913_read(priv, UB913_REG_CRC_ERRORS_LSB, &v1);
>> + ub913_read(priv, UB913_REG_CRC_ERRORS_MSB, &v2);
>
> Looks racy, but if it's for debugging only, I suppose it's fine.
Well, nothing we can do about that in SW. In any case, I think for the
user the value is either "none", "just a few", "a lot", so maybe the
racyness doesn't matter.
>> + dev_info(dev, "CRC errors %u\n", v1 | (v2 << 8));
>> +
>> + ub913_read(priv, UB913_REG_GENERAL_STATUS, &v);
>> + dev_info(dev, "GENERAL_STATUS %#x\n", v);
>> +
>> + ub913_read(priv, UB913_REG_PLL_OVR, &v);
>> + dev_info(dev, "PLL_OVR %#x\n", v);
>> +
>> + /* clear CRC errors */
>> + ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
>> + ub913_write(priv, UB913_REG_GENERAL_CFG, v | UB913_REG_GENERAL_CFG_CRC_ERR_RESET);
>
> Line wrap.
Ok.
>> + ub913_write(priv, UB913_REG_GENERAL_CFG, v);
>
> Move this just after reading the number of CRC errors to avoid dropping
> some errors.
Ok.
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_subdev_core_ops ub913_subdev_core_ops = {
>> + .log_status = ub913_log_status,
>> +};
>> +
>> +static const struct v4l2_subdev_pad_ops ub913_pad_ops = {
>> + .enable_streams = ub913_enable_streams,
>> + .disable_streams = ub913_disable_streams,
>> + .set_routing = ub913_set_routing,
>> + .get_frame_desc = ub913_get_frame_desc,
>> + .get_fmt = v4l2_subdev_get_fmt,
>> + .set_fmt = ub913_set_fmt,
>> + .init_cfg = ub913_init_cfg,
>> +};
>> +
>> +static const struct v4l2_subdev_ops ub913_subdev_ops = {
>> + .core = &ub913_subdev_core_ops,
>> + .pad = &ub913_pad_ops,
>> +};
>> +
>> +static const struct media_entity_operations ub913_entity_ops = {
>> + .link_validate = v4l2_subdev_link_validate,
>> +};
>> +
>> +static int ub913_notify_bound(struct v4l2_async_notifier *notifier,
>> + struct v4l2_subdev *source_subdev,
>> + struct v4l2_async_subdev *asd)
>> +{
>> + struct ub913_data *priv = sd_to_ub913(notifier->sd);
>> + struct device *dev = &priv->client->dev;
>> + unsigned int src_pad;
>> + int ret;
>> +
>> + ret = media_entity_get_fwnode_pad(&source_subdev->entity,
>> + source_subdev->fwnode,
>> + MEDIA_PAD_FL_SOURCE);
>> + if (ret < 0) {
>> + dev_err(dev, "Failed to find pad for %s\n",
>> + source_subdev->name);
>> + return ret;
>> + }
>> +
>> + priv->source_sd = source_subdev;
>> + src_pad = ret;
>> +
>> + ret = media_create_pad_link(&source_subdev->entity, src_pad,
>> + &priv->sd.entity, UB913_PAD_SINK,
>> + MEDIA_LNK_FL_ENABLED |
>> + MEDIA_LNK_FL_IMMUTABLE);
>> + if (ret) {
>> + dev_err(dev, "Unable to link %s:%u -> %s:0\n",
>> + source_subdev->name, src_pad, priv->sd.name);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_async_notifier_operations ub913_notify_ops = {
>> + .bound = ub913_notify_bound,
>> +};
>> +
>> +static int ub913_v4l2_notifier_register(struct ub913_data *priv)
>> +{
>> + struct device *dev = &priv->client->dev;
>> + struct v4l2_async_subdev *asd;
>> + struct device_node *ep_node;
>> + int ret;
>> +
>> + ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
>> + if (!ep_node) {
>> + dev_err(dev, "No graph endpoint\n");
>> + return -ENODEV;
>> + }
>> +
>> + v4l2_async_nf_init(&priv->notifier);
>> +
>> + asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier,
>> + of_fwnode_handle(ep_node),
>> + struct v4l2_async_subdev);
>> +
>> + of_node_put(ep_node);
>> +
>> + if (IS_ERR(asd)) {
>> + dev_err(dev, "Failed to add subdev: %ld", PTR_ERR(asd));
>> + v4l2_async_nf_cleanup(&priv->notifier);
>> + return PTR_ERR(asd);
>> + }
>> +
>> + priv->notifier.ops = &ub913_notify_ops;
>> +
>> + ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier);
>> + if (ret) {
>> + dev_err(dev, "Failed to register subdev_notifier");
>> + v4l2_async_nf_cleanup(&priv->notifier);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static void ub913_v4l2_nf_unregister(struct ub913_data *priv)
>> +{
>> + v4l2_async_nf_unregister(&priv->notifier);
>> + v4l2_async_nf_cleanup(&priv->notifier);
>> +}
>> +
>> +static int ub913_register_clkout(struct ub913_data *priv)
>> +{
>> + struct device *dev = &priv->client->dev;
>> + const char *name;
>> + int ret;
>> +
>> + name = kasprintf(GFP_KERNEL, "ds90ub913.%s.clk_out", dev_name(dev));
>
> if (!name)
> return -ENOMEM;
Oops...
>> +
>> + priv->clkout_clk_hw = devm_clk_hw_register_fixed_factor(dev, name,
>> + __clk_get_name(priv->clkin), 0, 1, 2);
>> +
>> + kfree(name);
>> +
>> + if (IS_ERR(priv->clkout_clk_hw))
>> + return dev_err_probe(dev, PTR_ERR(priv->clkout_clk_hw),
>> + "Cannot register clkout hw\n");
>> +
>> + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,
>> + priv->clkout_clk_hw);
>> + if (ret)
>> + return dev_err_probe(dev, ret,
>> + "Cannot add OF clock provider\n");
>> +
>> + return 0;
>> +}
>> +
>> +static int ub913_i2c_master_init(struct ub913_data *priv)
>> +{
>> + /* i2c fast mode */
>> + u32 scl_high = 600 + 300; /* high period + rise time, ns */
>> + u32 scl_low = 1300 + 300; /* low period + fall time, ns */
>> + unsigned long ref;
>> + int ret;
>> +
>> + ref = clk_get_rate(priv->clkin) / 2;
>> +
>> + scl_high = div64_u64((u64)scl_high * ref, 1000000000);
>> + scl_low = div64_u64((u64)scl_low * ref, 1000000000);
>> +
>> + ret = ub913_write(priv, UB913_REG_SCL_HIGH_TIME, scl_high);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ub913_write(priv, UB913_REG_SCL_LOW_TIME, scl_low);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub913_add_i2c_adapter(struct ub913_data *priv)
>> +{
>> + struct device *dev = &priv->client->dev;
>> + struct fwnode_handle *i2c_handle;
>> + int ret;
>> +
>> + i2c_handle = device_get_named_child_node(dev, "i2c");
>> + if (!i2c_handle)
>> + return 0;
>> +
>> + ret = i2c_atr_add_adapter(priv->plat_data->atr, priv->plat_data->port,
>> + i2c_handle);
>> +
>> + fwnode_handle_put(i2c_handle);
>> +
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub913_parse_dt(struct ub913_data *priv)
>> +{
>> + struct device_node *np = priv->client->dev.of_node;
>> + struct device *dev = &priv->client->dev;
>> + int ret;
>> + struct device_node *ep_np;
>
> Swap ret and ep_np.
Ok.
>> +
>> + if (!np) {
>> + dev_err(dev, "OF: no device tree node!\n");
>> + return -ENOENT;
>> + }
>
> Can this happen ?
Hmm, I'm not sure... Maybe if a board file creates the device? But
probably the case of !np can't happen in any normal use case, so it
should be fine to drop it.
>> +
>> + ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
>> + if (!ep_np) {
>> + dev_err(dev, "OF: no endpoint\n");
>> + return -ENOENT;
>> + }
>> +
>> + ret = of_property_read_u32(ep_np, "pclk-sample", &priv->pclk_polarity);
>> +
>> + of_node_put(ep_np);
>> +
>> + if (ret) {
>> + dev_err(dev, "OF: failed to parse pclk-sample: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int ub913_probe(struct i2c_client *client)
>> +{
>> + struct device *dev = &client->dev;
>> + struct ub913_data *priv;
>> + int ret;
>> + u8 v;
>> + bool mode_override;
>> + u8 mode;
>> +
>> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
>> + if (!priv)
>> + return -ENOMEM;
>> +
>> + priv->client = client;
>> +
>> + priv->plat_data = dev_get_platdata(&client->dev);
>> + if (!priv->plat_data) {
>> + dev_err(dev, "Platform data missing\n");
>> + return -ENODEV;
>> + }
>> +
>> + priv->regmap = devm_regmap_init_i2c(client, &ub913_regmap_config);
>> + if (IS_ERR(priv->regmap)) {
>> + dev_err(dev, "Failed to init regmap\n");
>> + return PTR_ERR(priv->regmap);
>> + }
>> +
>> + /* ub913 can also work without ext clock, but that is not supported */
>
> Maybe "not supported by the driver yet." to make it clear it could be
> added ?
Ok.
>> + priv->clkin = devm_clk_get(dev, "clkin");
>> + if (IS_ERR(priv->clkin)) {
>> + ret = PTR_ERR(priv->clkin);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Cannot get CLKIN (%d)", ret);
>
> Use dev_err_probe().
Ok.
>> + return ret;
>> + }
>> +
>> + ret = ub913_parse_dt(priv);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ub913_read(priv, UB913_REG_MODE_SEL, &v);
>> + if (ret)
>> + return ret;
>> +
>> + if (!(v & UB913_REG_MODE_SEL_MODE_UP_TO_DATE)) {
>> + dev_err(dev, "Mode value not stabilized\n");
>> + return -ENODEV;
>> + }
>> +
>> + mode_override = v & UB913_REG_MODE_SEL_MODE_OVERRIDE;
>> + mode = v & 0xf;
>
> A macro for the 0xf would be nice.
Ok.
>> +
>> + dev_dbg(dev, "mode from %s: %#x\n",
>> + mode_override ? "reg" : "deserializer", mode);
>> +
>> + ret = ub913_i2c_master_init(priv);
>> + if (ret) {
>> + dev_err(dev, "i2c master init failed: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + ret = ub913_gpiochip_probe(priv);
>> + if (ret) {
>> + dev_err(dev, "Failed to init gpiochip\n");
>> + return ret;
>> + }
>> +
>> + ret = ub913_register_clkout(priv);
>> + if (ret) {
>> + dev_err(dev, "Failed to register clkout\n");
>> + goto err_gpiochip_remove;
>> + }
>> +
>> + ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
>> + v &= ~UB913_REG_GENERAL_CFG_PCLK_RISING;
>> + v |= priv->pclk_polarity ? UB913_REG_GENERAL_CFG_PCLK_RISING : 0;
>> + ub913_write(priv, UB913_REG_GENERAL_CFG, v);
>
> We're completely missing power management, but I suppose that can be
> done later.
Yes. I'm not sure how that would be implemented. The serializer and the
whole camera module depends on the deserializer. In most cases both the
power and the communication comes from the deserializer over the
FPD-Link cable. I'm not sure if there's much the serializer can do alone
wrt. the power management.
Hmm, do we need a full bus structure for the FPD-Link after all, so that
we get power management features? Although that would mean also the
other peripherals on the camera module should somehow be involved, as we
can't turn off the deserializer and the serializer without somehow being
permitted by the other peripherals (like sensor).
> Should this be grouped with the UB913_REG_MODE_SEL check above, and
> maybe moved to a hardware init function ?
Yes, I can try to restructure this a bit. I guess if we add a hw init
function, also the ub913_i2c_master_init() would be called from there.
>> +
>> + v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub913_subdev_ops);
>> + priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
>> + priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
>> + priv->sd.entity.ops = &ub913_entity_ops;
>> +
>> + priv->pads[0].flags = MEDIA_PAD_FL_SINK;
>> + priv->pads[1].flags = MEDIA_PAD_FL_SOURCE;
>> +
>> + ret = media_entity_pads_init(&priv->sd.entity, 2, priv->pads);
>> + if (ret) {
>> + dev_err(dev, "Failed to init pads\n");
>> + goto err_gpiochip_remove;
>> + }
>> +
>> + priv->tx_ep_np = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
>> + if (priv->tx_ep_np)
>> + priv->sd.fwnode = of_fwnode_handle(priv->tx_ep_np);
>
> Can we meaningfully continue with tx_ep_np is NULL, or should that be an
> error ?
The matching part of v4l2 is not quite clear to me. I believe I took
this part from some other driver. The driver doesn't need the tx_ep_np,
afaiu this is only to help with the subdev connection matching. Is it
possible the matching could happen some other way than via fwnode?
That said... We require DT, so I think that means the tx_ep_np must be
there. If it's not, something is wrong, and we'd better fail. So, I
think I can handle !tx_ep_np as an error.
>> +
>> + ret = v4l2_subdev_init_finalize(&priv->sd);
>> + if (ret)
>> + goto err_entity_cleanup;
>> +
>> + ret = ub913_v4l2_notifier_register(priv);
>> + if (ret) {
>> + dev_err(dev, "v4l2 subdev notifier register failed: %d\n", ret);
>> + goto err_free_state;
>> + }
>> +
>> + ret = v4l2_async_register_subdev(&priv->sd);
>> + if (ret) {
>> + dev_err(dev, "v4l2_async_register_subdev error: %d\n", ret);
>> + goto err_unreg_notif;
>> + }
>> +
>> + ret = ub913_add_i2c_adapter(priv);
>> + if (ret) {
>> + dev_err(dev, "failed to add remote i2c adapter\n");
>> + goto err_unreg_async_subdev;
>> + }
>> +
>> + return 0;
>> +
>> +err_unreg_async_subdev:
>> + v4l2_async_unregister_subdev(&priv->sd);
>> +err_unreg_notif:
>> + ub913_v4l2_nf_unregister(priv);
>> +err_free_state:
>
> I'd name this err_subdev_cleanup.
Yep.
>> + v4l2_subdev_cleanup(&priv->sd);
>> +err_entity_cleanup:
>> + if (priv->tx_ep_np)
>> + of_node_put(priv->tx_ep_np);
>
> of_node_put() is a no-op when called with NULL, you can drop the check.
> Same below.
Ok.
>> +
>> + media_entity_cleanup(&priv->sd.entity);
>> +err_gpiochip_remove:
>> + ub913_gpiochip_remove(priv);
>> +
>> + return ret;
>> +}
>> +
>> +static void ub913_remove(struct i2c_client *client)
>> +{
>> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
>> + struct ub913_data *priv = sd_to_ub913(sd);
>> +
>> + i2c_atr_del_adapter(priv->plat_data->atr,
>> + priv->plat_data->port);
>> +
>> + v4l2_async_unregister_subdev(&priv->sd);
>> +
>> + ub913_v4l2_nf_unregister(priv);
>> +
>> + v4l2_subdev_cleanup(&priv->sd);
>> +
>> + if (priv->tx_ep_np)
>> + of_node_put(priv->tx_ep_np);
>> +
>> + media_entity_cleanup(&priv->sd.entity);
>> +
>> + ub913_gpiochip_remove(priv);
>> +}
>> +
>> +static const struct i2c_device_id ub913_id[] = { { "ds90ub913a-q1", 0 }, {} };
>> +MODULE_DEVICE_TABLE(i2c, ub913_id);
>> +
>> +#ifdef CONFIG_OF
>
> The driver depends on CONFIG_OF so I would drop this, as well as the
> of_match_ptr().
Ok.
>> +static const struct of_device_id ub913_dt_ids[] = {
>> + { .compatible = "ti,ds90ub913a-q1", },
>> + {}
>> +};
>> +MODULE_DEVICE_TABLE(of, ub913_dt_ids);
>> +#endif
>> +
>> +static struct i2c_driver ds90ub913_driver = {
>> + .probe_new = ub913_probe,
>> + .remove = ub913_remove,
>> + .id_table = ub913_id,
>> + .driver = {
>> + .name = "ds90ub913a",
>> + .owner = THIS_MODULE,
>> + .of_match_table = of_match_ptr(ub913_dt_ids),
>> + },
>> +};
>> +
>> +module_i2c_driver(ds90ub913_driver);
>> +
>> +MODULE_LICENSE("GPL");
>> +MODULE_DESCRIPTION("Texas Instruments DS90UB913 serializer driver");
>> +MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
>> +MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
>> +MODULE_IMPORT_NS(I2C_ATR);
>
Tomi
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-09 9:40 ` Tomi Valkeinen
@ 2023-01-09 9:56 ` Laurent Pinchart
0 siblings, 0 replies; 33+ messages in thread
From: Laurent Pinchart @ 2023-01-09 9:56 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
Hi Tomi,
On Mon, Jan 09, 2023 at 11:40:43AM +0200, Tomi Valkeinen wrote:
> On 08/01/2023 06:06, Laurent Pinchart wrote:
> > On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
> >> Add driver for TI DS90UB913 FPD-Link III Serializer.
> >>
> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> >> ---
> >> drivers/media/i2c/Kconfig | 13 +
> >> drivers/media/i2c/Makefile | 2 +-
> >> drivers/media/i2c/ds90ub913.c | 871 ++++++++++++++++++++++++++++++++++
> >> 3 files changed, 885 insertions(+), 1 deletion(-)
> >> create mode 100644 drivers/media/i2c/ds90ub913.c
[snip]
> >> diff --git a/drivers/media/i2c/ds90ub913.c b/drivers/media/i2c/ds90ub913.c
> >> new file mode 100644
> >> index 000000000000..0a60afb09cd3
> >> --- /dev/null
> >> +++ b/drivers/media/i2c/ds90ub913.c
> >> @@ -0,0 +1,871 @@
[snip]
> >> +static int ub913_log_status(struct v4l2_subdev *sd)
> >> +{
> >> + struct ub913_data *priv = sd_to_ub913(sd);
> >> + struct device *dev = &priv->client->dev;
> >> + u8 v, v1, v2;
> >> +
> >> + ub913_read(priv, UB913_REG_MODE_SEL, &v);
> >> + dev_info(dev, "MODE_SEL %#x\n", v);
> >
> > %#02x ? Same below.
>
> Ok.
>
> >> +
> >> + ub913_read(priv, UB913_REG_CRC_ERRORS_LSB, &v1);
> >> + ub913_read(priv, UB913_REG_CRC_ERRORS_MSB, &v2);
> >
> > Looks racy, but if it's for debugging only, I suppose it's fine.
>
> Well, nothing we can do about that in SW. In any case, I think for the
> user the value is either "none", "just a few", "a lot", so maybe the
> racyness doesn't matter.
It could be improved in software:
do {
ub913_read(priv, UB913_REG_CRC_ERRORS_MSB, &msb);
ub913_read(priv, UB913_REG_CRC_ERRORS_LSB, &lsb);
ub913_read(priv, UB913_REG_CRC_ERRORS_MSB, &msb2);
} while (msb1 != msb2);
but I think it's overkill.
> >> + dev_info(dev, "CRC errors %u\n", v1 | (v2 << 8));
> >> +
> >> + ub913_read(priv, UB913_REG_GENERAL_STATUS, &v);
> >> + dev_info(dev, "GENERAL_STATUS %#x\n", v);
> >> +
> >> + ub913_read(priv, UB913_REG_PLL_OVR, &v);
> >> + dev_info(dev, "PLL_OVR %#x\n", v);
> >> +
> >> + /* clear CRC errors */
> >> + ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
> >> + ub913_write(priv, UB913_REG_GENERAL_CFG, v | UB913_REG_GENERAL_CFG_CRC_ERR_RESET);
> >
> > Line wrap.
>
> Ok.
>
> >> + ub913_write(priv, UB913_REG_GENERAL_CFG, v);
> >
> > Move this just after reading the number of CRC errors to avoid dropping
> > some errors.
>
> Ok.
>
> >> +
> >> + return 0;
> >> +}
[snip]
> >> +static int ub913_probe(struct i2c_client *client)
> >> +{
> >> + struct device *dev = &client->dev;
> >> + struct ub913_data *priv;
> >> + int ret;
> >> + u8 v;
> >> + bool mode_override;
> >> + u8 mode;
> >> +
> >> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> >> + if (!priv)
> >> + return -ENOMEM;
> >> +
> >> + priv->client = client;
> >> +
> >> + priv->plat_data = dev_get_platdata(&client->dev);
> >> + if (!priv->plat_data) {
> >> + dev_err(dev, "Platform data missing\n");
> >> + return -ENODEV;
> >> + }
> >> +
> >> + priv->regmap = devm_regmap_init_i2c(client, &ub913_regmap_config);
> >> + if (IS_ERR(priv->regmap)) {
> >> + dev_err(dev, "Failed to init regmap\n");
> >> + return PTR_ERR(priv->regmap);
> >> + }
> >> +
> >> + /* ub913 can also work without ext clock, but that is not supported */
> >
> > Maybe "not supported by the driver yet." to make it clear it could be
> > added ?
>
> Ok.
>
> >> + priv->clkin = devm_clk_get(dev, "clkin");
> >> + if (IS_ERR(priv->clkin)) {
> >> + ret = PTR_ERR(priv->clkin);
> >> + if (ret != -EPROBE_DEFER)
> >> + dev_err(dev, "Cannot get CLKIN (%d)", ret);
> >
> > Use dev_err_probe().
>
> Ok.
>
> >> + return ret;
> >> + }
> >> +
> >> + ret = ub913_parse_dt(priv);
> >> + if (ret)
> >> + return ret;
> >> +
> >> + ret = ub913_read(priv, UB913_REG_MODE_SEL, &v);
> >> + if (ret)
> >> + return ret;
> >> +
> >> + if (!(v & UB913_REG_MODE_SEL_MODE_UP_TO_DATE)) {
> >> + dev_err(dev, "Mode value not stabilized\n");
> >> + return -ENODEV;
> >> + }
> >> +
> >> + mode_override = v & UB913_REG_MODE_SEL_MODE_OVERRIDE;
> >> + mode = v & 0xf;
> >
> > A macro for the 0xf would be nice.
>
> Ok.
>
> >> +
> >> + dev_dbg(dev, "mode from %s: %#x\n",
> >> + mode_override ? "reg" : "deserializer", mode);
> >> +
> >> + ret = ub913_i2c_master_init(priv);
> >> + if (ret) {
> >> + dev_err(dev, "i2c master init failed: %d\n", ret);
> >> + return ret;
> >> + }
> >> +
> >> + ret = ub913_gpiochip_probe(priv);
> >> + if (ret) {
> >> + dev_err(dev, "Failed to init gpiochip\n");
> >> + return ret;
> >> + }
> >> +
> >> + ret = ub913_register_clkout(priv);
> >> + if (ret) {
> >> + dev_err(dev, "Failed to register clkout\n");
> >> + goto err_gpiochip_remove;
> >> + }
> >> +
> >> + ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
> >> + v &= ~UB913_REG_GENERAL_CFG_PCLK_RISING;
> >> + v |= priv->pclk_polarity ? UB913_REG_GENERAL_CFG_PCLK_RISING : 0;
> >> + ub913_write(priv, UB913_REG_GENERAL_CFG, v);
> >
> > We're completely missing power management, but I suppose that can be
> > done later.
>
> Yes. I'm not sure how that would be implemented. The serializer and the
> whole camera module depends on the deserializer. In most cases both the
> power and the communication comes from the deserializer over the
> FPD-Link cable. I'm not sure if there's much the serializer can do alone
> wrt. the power management.
>
> Hmm, do we need a full bus structure for the FPD-Link after all, so that
> we get power management features? Although that would mean also the
> other peripherals on the camera module should somehow be involved, as we
> can't turn off the deserializer and the serializer without somehow being
> permitted by the other peripherals (like sensor).
I suppose time will tell :-)
> > Should this be grouped with the UB913_REG_MODE_SEL check above, and
> > maybe moved to a hardware init function ?
>
> Yes, I can try to restructure this a bit. I guess if we add a hw init
> function, also the ub913_i2c_master_init() would be called from there.
>
> >> +
> >> + v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub913_subdev_ops);
> >> + priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
> >> + priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
> >> + priv->sd.entity.ops = &ub913_entity_ops;
> >> +
> >> + priv->pads[0].flags = MEDIA_PAD_FL_SINK;
> >> + priv->pads[1].flags = MEDIA_PAD_FL_SOURCE;
> >> +
> >> + ret = media_entity_pads_init(&priv->sd.entity, 2, priv->pads);
> >> + if (ret) {
> >> + dev_err(dev, "Failed to init pads\n");
> >> + goto err_gpiochip_remove;
> >> + }
> >> +
> >> + priv->tx_ep_np = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
> >> + if (priv->tx_ep_np)
> >> + priv->sd.fwnode = of_fwnode_handle(priv->tx_ep_np);
> >
> > Can we meaningfully continue with tx_ep_np is NULL, or should that be an
> > error ?
>
> The matching part of v4l2 is not quite clear to me. I believe I took
> this part from some other driver. The driver doesn't need the tx_ep_np,
> afaiu this is only to help with the subdev connection matching. Is it
> possible the matching could happen some other way than via fwnode?
In general yes, in practice we require DT so we will never match through
another mean.
> That said... We require DT, so I think that means the tx_ep_np must be
> there. If it's not, something is wrong, and we'd better fail. So, I
> think I can handle !tx_ep_np as an error.
Sounds good to me.
> >> +
> >> + ret = v4l2_subdev_init_finalize(&priv->sd);
> >> + if (ret)
> >> + goto err_entity_cleanup;
> >> +
> >> + ret = ub913_v4l2_notifier_register(priv);
> >> + if (ret) {
> >> + dev_err(dev, "v4l2 subdev notifier register failed: %d\n", ret);
> >> + goto err_free_state;
> >> + }
> >> +
> >> + ret = v4l2_async_register_subdev(&priv->sd);
> >> + if (ret) {
> >> + dev_err(dev, "v4l2_async_register_subdev error: %d\n", ret);
> >> + goto err_unreg_notif;
> >> + }
> >> +
> >> + ret = ub913_add_i2c_adapter(priv);
> >> + if (ret) {
> >> + dev_err(dev, "failed to add remote i2c adapter\n");
> >> + goto err_unreg_async_subdev;
> >> + }
> >> +
> >> + return 0;
> >> +
> >> +err_unreg_async_subdev:
> >> + v4l2_async_unregister_subdev(&priv->sd);
> >> +err_unreg_notif:
> >> + ub913_v4l2_nf_unregister(priv);
> >> +err_free_state:
> >
> > I'd name this err_subdev_cleanup.
>
> Yep.
>
> >> + v4l2_subdev_cleanup(&priv->sd);
> >> +err_entity_cleanup:
> >> + if (priv->tx_ep_np)
> >> + of_node_put(priv->tx_ep_np);
> >
> > of_node_put() is a no-op when called with NULL, you can drop the check.
> > Same below.
>
> Ok.
>
> >> +
> >> + media_entity_cleanup(&priv->sd.entity);
> >> +err_gpiochip_remove:
> >> + ub913_gpiochip_remove(priv);
> >> +
> >> + return ret;
> >> +}
> >> +
> >> +static void ub913_remove(struct i2c_client *client)
> >> +{
> >> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> >> + struct ub913_data *priv = sd_to_ub913(sd);
> >> +
> >> + i2c_atr_del_adapter(priv->plat_data->atr,
> >> + priv->plat_data->port);
> >> +
> >> + v4l2_async_unregister_subdev(&priv->sd);
> >> +
> >> + ub913_v4l2_nf_unregister(priv);
> >> +
> >> + v4l2_subdev_cleanup(&priv->sd);
> >> +
> >> + if (priv->tx_ep_np)
> >> + of_node_put(priv->tx_ep_np);
> >> +
> >> + media_entity_cleanup(&priv->sd.entity);
> >> +
> >> + ub913_gpiochip_remove(priv);
> >> +}
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-08 4:06 ` Laurent Pinchart
2023-01-09 9:40 ` Tomi Valkeinen
@ 2023-01-09 11:07 ` Andy Shevchenko
2023-01-09 12:59 ` Tomi Valkeinen
1 sibling, 1 reply; 33+ messages in thread
From: Andy Shevchenko @ 2023-01-09 11:07 UTC (permalink / raw)
To: Laurent Pinchart
Cc: Tomi Valkeinen, linux-media, devicetree, linux-kernel, linux-i2c,
Rob Herring, Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Matti Vaittinen, Mauro Carvalho Chehab, Peter Rosin,
Liam Girdwood, Mark Brown, Sakari Ailus, Michael Tretter,
Shawn Tu, Hans Verkuil, Mike Pagano, Krzysztof Hałasa,
Marek Vasut
On Sun, Jan 08, 2023 at 06:06:34AM +0200, Laurent Pinchart wrote:
> On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
...
> > + scnprintf(priv->gpio_chip_name, sizeof(priv->gpio_chip_name), "%s",
> > + dev_name(dev));
>
> I think you can use strscpy().
Actually I'm not sure we even need that variable. What is the lifetime of
the dev and gc? I believe they are the same or gc's one is shorter, hence
dev_name() can be used directly, no?
...
> > + gc->of_node = priv->client->dev.of_node;
We don't have of_node anymore in gc. And if the parent device is set, you can
drop this line (it will work with older and newer kernels. Otherwise, use
fwnode.
...
> > + ret = gpiochip_add_data(gc, priv);
> > + if (ret) {
> > + dev_err(dev, "Failed to add GPIOs: %d\n", ret);
> > + return ret;
> > + }
> > +
> > + return 0;
return ret;
...
> > + ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
Why this can't be fwnode_handle from day 1?
> > + if (!ep_node) {
> > + dev_err(dev, "No graph endpoint\n");
> > + return -ENODEV;
> > + }
...
> > + ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
> > + if (!ep_np) {
> > + dev_err(dev, "OF: no endpoint\n");
> > + return -ENOENT;
> > + }
Ditto.
> > + ret = of_property_read_u32(ep_np, "pclk-sample", &priv->pclk_polarity);
> > +
> > + of_node_put(ep_np);
Ditto.
...
> > + return ret;
> > + }
> > +
> > + return 0;
return ret;
...
> > + priv->plat_data = dev_get_platdata(&client->dev);
> > + if (!priv->plat_data) {
> > + dev_err(dev, "Platform data missing\n");
> > + return -ENODEV;
return dev_err_probe(...); ?
> > + }
...
> > + priv->regmap = devm_regmap_init_i2c(client, &ub913_regmap_config);
> > + if (IS_ERR(priv->regmap)) {
> > + dev_err(dev, "Failed to init regmap\n");
> > + return PTR_ERR(priv->regmap);
Ditto?
> > + }
...
> > +#ifdef CONFIG_OF
>
> The driver depends on CONFIG_OF so I would drop this, as well as the
> of_match_ptr().
Even if there is no OF dependency, these ugly ifdeffery with of_match_ptr()
are error prone (compilation wise).
...
> > +static const struct of_device_id ub913_dt_ids[] = {
> > + { .compatible = "ti,ds90ub913a-q1", },
Inner comma is not needed.
> > + {}
> > +};
...
> > +static struct i2c_driver ds90ub913_driver = {
> > + .probe_new = ub913_probe,
> > + .remove = ub913_remove,
> > + .id_table = ub913_id,
> > + .driver = {
> > + .name = "ds90ub913a",
> > + .owner = THIS_MODULE,
This is something like for 5+ years is not needed, as the below macro sets it
for you.
> > + .of_match_table = of_match_ptr(ub913_dt_ids),
> > + },
> > +};
> > +
Redundant blank line.
> > +module_i2c_driver(ds90ub913_driver);
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-09 11:07 ` Andy Shevchenko
@ 2023-01-09 12:59 ` Tomi Valkeinen
2023-01-09 13:55 ` Andy Shevchenko
0 siblings, 1 reply; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-09 12:59 UTC (permalink / raw)
To: Andy Shevchenko, Laurent Pinchart
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Matti Vaittinen, Mauro Carvalho Chehab, Peter Rosin,
Liam Girdwood, Mark Brown, Sakari Ailus, Michael Tretter,
Shawn Tu, Hans Verkuil, Mike Pagano, Krzysztof Hałasa,
Marek Vasut
On 09/01/2023 13:07, Andy Shevchenko wrote:
> On Sun, Jan 08, 2023 at 06:06:34AM +0200, Laurent Pinchart wrote:
>> On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
>
> ...
>
>>> + scnprintf(priv->gpio_chip_name, sizeof(priv->gpio_chip_name), "%s",
>>> + dev_name(dev));
>>
>> I think you can use strscpy().
>
> Actually I'm not sure we even need that variable. What is the lifetime of
> the dev and gc? I believe they are the same or gc's one is shorter, hence
> dev_name() can be used directly, no?
I think this is a valid point, no need for the extra variable afaics.
> ...
>
>>> + gc->of_node = priv->client->dev.of_node;
>
> We don't have of_node anymore in gc. And if the parent device is set, you can
> drop this line (it will work with older and newer kernels. Otherwise, use
> fwnode.
What do you mean "we don't have of_node anymore"?
> ...
>
>>> + ret = gpiochip_add_data(gc, priv);
>>> + if (ret) {
>>> + dev_err(dev, "Failed to add GPIOs: %d\n", ret);
>
>>> + return ret;
>>> + }
>>> +
>>> + return 0;
>
> return ret;
I'm not a fan of that style. I like my error handling ifs to return the
error inside the if block, and a successful function ends in a "return 0".
> ...
>
>>> + ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
>
> Why this can't be fwnode_handle from day 1?
I guess it can. It's an old driver and there has been no need to convert
to fwnode, so we're still using OF.
>>> + if (!ep_node) {
>>> + dev_err(dev, "No graph endpoint\n");
>>> + return -ENODEV;
>>> + }
>
> ...
>
>>> + ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
>>> + if (!ep_np) {
>>> + dev_err(dev, "OF: no endpoint\n");
>>> + return -ENOENT;
>>> + }
>
> Ditto.
>
>>> + ret = of_property_read_u32(ep_np, "pclk-sample", &priv->pclk_polarity);
>>> +
>>> + of_node_put(ep_np);
>
> Ditto.
>
> ...
>
>>> + return ret;
>>> + }
>>> +
>>> + return 0;
>
> return ret;
>
> ...
>
>>> + priv->plat_data = dev_get_platdata(&client->dev);
>>> + if (!priv->plat_data) {
>>> + dev_err(dev, "Platform data missing\n");
>>> + return -ENODEV;
>
> return dev_err_probe(...); ?
Isn't the idea with dev_err_probe to use it where -EPROBE_DEFER might be
the error? That's not the case here.
Buuut reading the relevant docs a bit more shows that it's actually
recommended to be used in this kind of cases too, so you're right.
>>> + }
>
> ...
>
>>> + priv->regmap = devm_regmap_init_i2c(client, &ub913_regmap_config);
>>> + if (IS_ERR(priv->regmap)) {
>>> + dev_err(dev, "Failed to init regmap\n");
>>> + return PTR_ERR(priv->regmap);
>
> Ditto?
>
>>> + }
>
> ...
>
>>> +#ifdef CONFIG_OF
>>
>> The driver depends on CONFIG_OF so I would drop this, as well as the
>> of_match_ptr().
>
> Even if there is no OF dependency, these ugly ifdeffery with of_match_ptr()
> are error prone (compilation wise).
>
> ...
>
>>> +static const struct of_device_id ub913_dt_ids[] = {
>>> + { .compatible = "ti,ds90ub913a-q1", },
>
> Inner comma is not needed.
Ok.
>
>>> + {}
>>> +};
>
> ...
>
>>> +static struct i2c_driver ds90ub913_driver = {
>>> + .probe_new = ub913_probe,
>>> + .remove = ub913_remove,
>>> + .id_table = ub913_id,
>>> + .driver = {
>>> + .name = "ds90ub913a",
>
>>> + .owner = THIS_MODULE,
>
> This is something like for 5+ years is not needed, as the below macro sets it
> for you.
Ok.
>>> + .of_match_table = of_match_ptr(ub913_dt_ids),
>>> + },
>>> +};
>
>>> +
>
> Redundant blank line.
>
>>> +module_i2c_driver(ds90ub913_driver);
>
Tomi
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-09 12:59 ` Tomi Valkeinen
@ 2023-01-09 13:55 ` Andy Shevchenko
2023-01-09 13:58 ` Andy Shevchenko
0 siblings, 1 reply; 33+ messages in thread
From: Andy Shevchenko @ 2023-01-09 13:55 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: Laurent Pinchart, linux-media, devicetree, linux-kernel,
linux-i2c, Rob Herring, Krzysztof Kozlowski, Wolfram Sang,
Luca Ceresoli, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
On Mon, Jan 09, 2023 at 02:59:01PM +0200, Tomi Valkeinen wrote:
> On 09/01/2023 13:07, Andy Shevchenko wrote:
> > On Sun, Jan 08, 2023 at 06:06:34AM +0200, Laurent Pinchart wrote:
> > > On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
...
> > > > + gc->of_node = priv->client->dev.of_node;
> >
> > We don't have of_node anymore in gc. And if the parent device is set, you can
> > drop this line (it will work with older and newer kernels. Otherwise, use
> > fwnode.
>
> What do you mean "we don't have of_node anymore"?
There is no of_node member of struct gpio_chip anymore. This will fail
to compile.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-09 13:55 ` Andy Shevchenko
@ 2023-01-09 13:58 ` Andy Shevchenko
2023-01-09 14:01 ` Tomi Valkeinen
0 siblings, 1 reply; 33+ messages in thread
From: Andy Shevchenko @ 2023-01-09 13:58 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: Laurent Pinchart, linux-media, devicetree, linux-kernel,
linux-i2c, Rob Herring, Krzysztof Kozlowski, Wolfram Sang,
Luca Ceresoli, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
On Mon, Jan 09, 2023 at 03:55:39PM +0200, Andy Shevchenko wrote:
> On Mon, Jan 09, 2023 at 02:59:01PM +0200, Tomi Valkeinen wrote:
> > On 09/01/2023 13:07, Andy Shevchenko wrote:
> > > On Sun, Jan 08, 2023 at 06:06:34AM +0200, Laurent Pinchart wrote:
> > > > On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
...
> > > > > + gc->of_node = priv->client->dev.of_node;
> > >
> > > We don't have of_node anymore in gc. And if the parent device is set, you can
> > > drop this line (it will work with older and newer kernels. Otherwise, use
> > > fwnode.
> >
> > What do you mean "we don't have of_node anymore"?
Just to add that you missed "gc" in the quote which is crucial to get
what I meant.
> There is no of_node member of struct gpio_chip anymore. This will fail
> to compile.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-09 13:58 ` Andy Shevchenko
@ 2023-01-09 14:01 ` Tomi Valkeinen
2023-01-09 14:11 ` Andy Shevchenko
0 siblings, 1 reply; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-09 14:01 UTC (permalink / raw)
To: Andy Shevchenko
Cc: Laurent Pinchart, linux-media, devicetree, linux-kernel,
linux-i2c, Rob Herring, Krzysztof Kozlowski, Wolfram Sang,
Luca Ceresoli, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
On 09/01/2023 15:58, Andy Shevchenko wrote:
> On Mon, Jan 09, 2023 at 03:55:39PM +0200, Andy Shevchenko wrote:
>> On Mon, Jan 09, 2023 at 02:59:01PM +0200, Tomi Valkeinen wrote:
>>> On 09/01/2023 13:07, Andy Shevchenko wrote:
>>>> On Sun, Jan 08, 2023 at 06:06:34AM +0200, Laurent Pinchart wrote:
>>>>> On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
>
> ...
>
>>>>>> + gc->of_node = priv->client->dev.of_node;
>>>>
>>>> We don't have of_node anymore in gc. And if the parent device is set, you can
>>>> drop this line (it will work with older and newer kernels. Otherwise, use
>>>> fwnode.
>>>
>>> What do you mean "we don't have of_node anymore"?
>
> Just to add that you missed "gc" in the quote which is crucial to get
> what I meant.
Well, the original text was just above...
>> There is no of_node member of struct gpio_chip anymore. This will fail
>> to compile.
It's in Linus' tree, but yes, now that I fetched linux-next I see it's gone.
Tomi
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-09 14:01 ` Tomi Valkeinen
@ 2023-01-09 14:11 ` Andy Shevchenko
2023-01-09 15:08 ` Tomi Valkeinen
0 siblings, 1 reply; 33+ messages in thread
From: Andy Shevchenko @ 2023-01-09 14:11 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: Laurent Pinchart, linux-media, devicetree, linux-kernel,
linux-i2c, Rob Herring, Krzysztof Kozlowski, Wolfram Sang,
Luca Ceresoli, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
On Mon, Jan 09, 2023 at 04:01:43PM +0200, Tomi Valkeinen wrote:
> On 09/01/2023 15:58, Andy Shevchenko wrote:
> > On Mon, Jan 09, 2023 at 03:55:39PM +0200, Andy Shevchenko wrote:
> > > On Mon, Jan 09, 2023 at 02:59:01PM +0200, Tomi Valkeinen wrote:
> > > > On 09/01/2023 13:07, Andy Shevchenko wrote:
> > > > > On Sun, Jan 08, 2023 at 06:06:34AM +0200, Laurent Pinchart wrote:
> > > > > > On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
...
> > > > > > > + gc->of_node = priv->client->dev.of_node;
> > > > >
> > > > > We don't have of_node anymore in gc. And if the parent device is set, you can
> > > > > drop this line (it will work with older and newer kernels. Otherwise, use
> > > > > fwnode.
> > > >
> > > > What do you mean "we don't have of_node anymore"?
> >
> > Just to add that you missed "gc" in the quote which is crucial to get
> > what I meant.
>
> Well, the original text was just above...
Yes, but my point is that that part is crucial and since you left it out makes
me think that you are talking about general of_node, which is of course won't
gone any time soon :-)
> > > There is no of_node member of struct gpio_chip anymore. This will fail
> > > to compile.
>
> It's in Linus' tree, but yes, now that I fetched linux-next I see it's gone.
Right. I expressed to Bart to include that change into one of the rcX, but he
decided to go for next. Dunno how many cases like yours we may experience in
this cycle.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [PATCH v6 7/8] media: i2c: add DS90UB913 driver
2023-01-09 14:11 ` Andy Shevchenko
@ 2023-01-09 15:08 ` Tomi Valkeinen
0 siblings, 0 replies; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-09 15:08 UTC (permalink / raw)
To: Andy Shevchenko
Cc: Laurent Pinchart, linux-media, devicetree, linux-kernel,
linux-i2c, Rob Herring, Krzysztof Kozlowski, Wolfram Sang,
Luca Ceresoli, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
On 09/01/2023 16:11, Andy Shevchenko wrote:
> On Mon, Jan 09, 2023 at 04:01:43PM +0200, Tomi Valkeinen wrote:
>> On 09/01/2023 15:58, Andy Shevchenko wrote:
>>> On Mon, Jan 09, 2023 at 03:55:39PM +0200, Andy Shevchenko wrote:
>>>> On Mon, Jan 09, 2023 at 02:59:01PM +0200, Tomi Valkeinen wrote:
>>>>> On 09/01/2023 13:07, Andy Shevchenko wrote:
>>>>>> On Sun, Jan 08, 2023 at 06:06:34AM +0200, Laurent Pinchart wrote:
>>>>>>> On Thu, Jan 05, 2023 at 04:03:06PM +0200, Tomi Valkeinen wrote:
>
> ...
>
>>>>>>>> + gc->of_node = priv->client->dev.of_node;
>>>>>>
>>>>>> We don't have of_node anymore in gc. And if the parent device is set, you can
>>>>>> drop this line (it will work with older and newer kernels. Otherwise, use
>>>>>> fwnode.
>>>>>
>>>>> What do you mean "we don't have of_node anymore"?
>>>
>>> Just to add that you missed "gc" in the quote which is crucial to get
>>> what I meant.
>>
>> Well, the original text was just above...
>
> Yes, but my point is that that part is crucial and since you left it out makes
> me think that you are talking about general of_node, which is of course won't
> gone any time soon :-)
>
>>>> There is no of_node member of struct gpio_chip anymore. This will fail
>>>> to compile.
>>
>> It's in Linus' tree, but yes, now that I fetched linux-next I see it's gone.
>
> Right. I expressed to Bart to include that change into one of the rcX, but he
> decided to go for next. Dunno how many cases like yours we may experience in
> this cycle.
Alright. Well, good that you caught this already. In the worst case we
would have had a compilation break in the next merge window.
Tomi
^ permalink raw reply [flat|nested] 33+ messages in thread
* [PATCH v6 8/8] media: i2c: add DS90UB953 driver
2023-01-05 14:02 [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
` (6 preceding siblings ...)
2023-01-05 14:03 ` [PATCH v6 7/8] media: i2c: add DS90UB913 driver Tomi Valkeinen
@ 2023-01-05 14:03 ` Tomi Valkeinen
2023-01-08 4:23 ` Laurent Pinchart
2023-01-05 14:05 ` [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
8 siblings, 1 reply; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-05 14:03 UTC (permalink / raw)
To: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen
Cc: Mauro Carvalho Chehab, Peter Rosin, Liam Girdwood, Mark Brown,
Sakari Ailus, Laurent Pinchart, Michael Tretter, Shawn Tu,
Hans Verkuil, Mike Pagano, Krzysztof Hałasa, Marek Vasut,
Tomi Valkeinen
Add driver for TI DS90UB953 FPD-Link III Serializer.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
drivers/media/i2c/Kconfig | 13 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/ds90ub953.c | 1590 +++++++++++++++++++++++++++++++++
3 files changed, 1604 insertions(+)
create mode 100644 drivers/media/i2c/ds90ub953.c
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index eb312d6e9cf6..29594c724307 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -1614,6 +1614,19 @@ config VIDEO_DS90UB913
Device driver for the Texas Instruments DS90UB913
FPD-Link III Serializer.
+config VIDEO_DS90UB953
+ tristate "TI DS90UB953 Serializer"
+ depends on OF && I2C && VIDEO_DEV
+ select MEDIA_CONTROLLER
+ select VIDEO_V4L2_SUBDEV_API
+ select V4L2_FWNODE
+ select REGMAP_I2C
+ select OF_GPIO
+ select I2C_ATR
+ help
+ Device driver for the Texas Instruments DS90UB953
+ FPD-Link III Serializer and DS90UB971 FPD-Link IV Serializer.
+
config VIDEO_DS90UB960
tristate "TI DS90UB960 Deserializer"
depends on OF && I2C && VIDEO_DEV
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index c4875ec8c3b9..efd5f717a5f7 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -143,4 +143,5 @@ obj-$(CONFIG_VIDEO_VS6624) += vs6624.o
obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
obj-$(CONFIG_VIDEO_DS90UB913) += ds90ub913.o
+obj-$(CONFIG_VIDEO_DS90UB953) += ds90ub953.o
obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
diff --git a/drivers/media/i2c/ds90ub953.c b/drivers/media/i2c/ds90ub953.c
new file mode 100644
index 000000000000..251dc8e8adfa
--- /dev/null
+++ b/drivers/media/i2c/ds90ub953.c
@@ -0,0 +1,1590 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for the Texas Instruments DS90UB953 video serializer
+ *
+ * Based on a driver from Luca Ceresoli <luca@lucaceresoli.net>
+ *
+ * Copyright (c) 2019 Luca Ceresoli <luca@lucaceresoli.net>
+ * Copyright (c) 2022 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/driver.h>
+#include <linux/i2c-atr.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/rational.h>
+#include <linux/regmap.h>
+
+#include <media/i2c/ds90ub9xx.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-subdev.h>
+
+#define UB953_PAD_SINK 0
+#define UB953_PAD_SOURCE 1
+
+#define UB953_NUM_GPIOS 4
+
+#define UB953_REG_RESET_CTL 0x01
+#define UB953_REG_RESET_CTL_DIGITAL_RESET_1 BIT(1)
+#define UB953_REG_RESET_CTL_DIGITAL_RESET_0 BIT(0)
+
+#define UB953_REG_GENERAL_CFG 0x02
+#define UB953_REG_GENERAL_CFG_CONT_CLK BIT(6)
+#define UB953_REG_GENERAL_CFG_CSI_LANE_SEL_SHIFT 4
+#define UB953_REG_GENERAL_CFG_CSI_LANE_SEL_MASK GENMASK(5, 4)
+#define UB953_REG_GENERAL_CFG_CRC_TX_GEN_ENABLE BIT(1)
+#define UB953_REG_GENERAL_CFG_I2C_STRAP_MODE BIT(0)
+
+#define UB953_REG_MODE_SEL 0x03
+#define UB953_REG_MODE_SEL_MODE_DONE BIT(3)
+#define UB953_REG_MODE_SEL_MODE_OVERRIDE BIT(4)
+#define UB953_REG_MODE_SEL_MODE_MASK GENMASK(2, 0)
+
+#define UB953_REG_CLKOUT_CTRL0 0x06
+#define UB953_REG_CLKOUT_CTRL1 0x07
+
+#define UB953_REG_SCL_HIGH_TIME 0x0B
+#define UB953_REG_SCL_LOW_TIME 0x0C
+
+#define UB953_REG_LOCAL_GPIO_DATA 0x0d
+#define UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(n) BIT(4 + (n))
+#define UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(n) BIT(0 + (n))
+
+#define UB953_REG_GPIO_INPUT_CTRL 0x0e
+#define UB953_REG_GPIO_INPUT_CTRL_OUT_EN(n) BIT(4 + (n))
+#define UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(n) BIT(0 + (n))
+
+#define UB953_REG_REV_MASK_ID 0x50
+#define UB953_REG_GENERAL_STATUS 0x52
+
+#define UB953_REG_GPIO_PIN_STS 0x53
+#define UB953_REG_GPIO_PIN_STS_GPIO_STS(n) BIT(0 + (n))
+
+#define UB953_REG_BIST_ERR_CNT 0x54
+#define UB953_REG_CRC_ERR_CNT1 0x55
+#define UB953_REG_CRC_ERR_CNT2 0x56
+
+#define UB953_REG_CSI_ERR_CNT 0x5c
+#define UB953_REG_CSI_ERR_STATUS 0x5D
+#define UB953_REG_CSI_ERR_DLANE01 0x5E
+#define UB953_REG_CSI_ERR_DLANE23 0x5F
+#define UB953_REG_CSI_ERR_CLK_LANE 0x60
+#define UB953_REG_CSI_PKT_HDR_VC_ID 0x61
+#define UB953_REG_PKT_HDR_WC_LSB 0x62
+#define UB953_REG_PKT_HDR_WC_MSB 0x63
+#define UB953_REG_CSI_ECC 0x64
+
+#define UB953_REG_IND_ACC_CTL 0xb0
+#define UB953_REG_IND_ACC_ADDR 0xb1
+#define UB953_REG_IND_ACC_DATA 0xb2
+
+#define UB953_REG_FPD3_RX_ID(n) (0xf0 + (n))
+
+/* Indirect register blocks */
+#define UB953_IND_TARGET_PAT_GEN 0x00
+#define UB953_IND_TARGET_FPD3_TX 0x01
+#define UB953_IND_TARGET_DIE_ID 0x02
+
+#define UB953_IND_PGEN_CTL 0x01
+#define UB953_IND_PGEN_CTL_PGEN_ENABLE BIT(0)
+#define UB953_IND_PGEN_CFG 0x02
+#define UB953_IND_PGEN_CSI_DI 0x03
+#define UB953_IND_PGEN_LINE_SIZE1 0x04
+#define UB953_IND_PGEN_LINE_SIZE0 0x05
+#define UB953_IND_PGEN_BAR_SIZE1 0x06
+#define UB953_IND_PGEN_BAR_SIZE0 0x07
+#define UB953_IND_PGEN_ACT_LPF1 0x08
+#define UB953_IND_PGEN_ACT_LPF0 0x09
+#define UB953_IND_PGEN_TOT_LPF1 0x0A
+#define UB953_IND_PGEN_TOT_LPF0 0x0B
+#define UB953_IND_PGEN_LINE_PD1 0x0C
+#define UB953_IND_PGEN_LINE_PD0 0x0D
+#define UB953_IND_PGEN_VBP 0x0E
+#define UB953_IND_PGEN_VFP 0x0F
+#define UB953_IND_PGEN_COLOR(n) (0x10 + (n)) /* n <= 15 */
+
+/* Note: Only sync mode supported for now */
+enum ub953_mode {
+ /* FPD-Link III CSI-2 synchronous mode */
+ UB953_MODE_SYNC,
+ /* FPD-Link III CSI-2 non-synchronous mode, external ref clock */
+ UB953_MODE_NONSYNC_EXT,
+ /* FPD-Link III CSI-2 non-synchronous mode, internal ref clock */
+ UB953_MODE_NONSYNC_INT,
+ /* FPD-Link III DVP mode */
+ UB953_MODE_DVP,
+};
+
+struct ub953_hw_data {
+ const char *model;
+ bool ub971;
+};
+
+struct ub953_data {
+ const struct ub953_hw_data *hw_data;
+
+ struct i2c_client *client;
+ struct regmap *regmap;
+
+ u32 num_data_lanes;
+
+ struct gpio_chip gpio_chip;
+ char gpio_chip_name[64];
+
+ struct v4l2_subdev sd;
+ struct media_pad pads[2];
+
+ struct v4l2_async_notifier notifier;
+
+ struct v4l2_subdev *source_sd;
+
+ struct v4l2_ctrl_handler ctrl_handler;
+
+ u64 enabled_source_streams;
+
+ struct device_node *tx_ep_np;
+
+ /* lock for register access */
+ struct mutex reg_lock;
+
+ u8 current_indirect_target;
+
+ struct clk_hw clkout_clk_hw;
+
+ enum ub953_mode mode;
+
+ struct ds90ub9xx_platform_data *plat_data;
+};
+
+static inline struct ub953_data *sd_to_ub953(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct ub953_data, sd);
+}
+
+/*
+ * HW Access
+ */
+
+static int ub953_read(struct ub953_data *priv, u8 reg, u8 *val)
+{
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_read(priv->regmap, reg, &v);
+ if (ret)
+ dev_err(&priv->client->dev,
+ "Cannot read register 0x%02x: %d!\n", reg, ret);
+ else
+ *val = v;
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub953_write(struct ub953_data *priv, u8 reg, u8 val)
+{
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_write(priv->regmap, reg, val);
+ if (ret)
+ dev_err(&priv->client->dev,
+ "Cannot write register 0x%02x: %d!\n", reg, ret);
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int _ub953_select_ind_reg_block(struct ub953_data *priv, u8 block)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ if (priv->current_indirect_target == block)
+ return 0;
+
+ ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_CTL, block << 2);
+ if (ret) {
+ dev_err(dev, "%s: cannot select indirect target %u (%d)!\n",
+ __func__, block, ret);
+ return ret;
+ }
+
+ priv->current_indirect_target = block;
+
+ return 0;
+}
+
+__maybe_unused
+static int ub953_read_ind(struct ub953_data *priv, u8 block, u8 reg, u8 *val)
+{
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = _ub953_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg);
+ if (ret)
+ goto out;
+
+ ret = regmap_read(priv->regmap, UB953_REG_IND_ACC_DATA, &v);
+ if (ret)
+ goto out;
+
+ *val = v;
+
+out:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub953_write_ind(struct ub953_data *priv, u8 block, u8 reg, u8 val)
+{
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = _ub953_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_DATA, val);
+
+out:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub953_write_ind16(struct ub953_data *priv, u8 block, u8 reg, u16 val)
+{
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = _ub953_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_DATA, val >> 8);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg + 1);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_DATA, val & 0xff);
+ if (ret)
+ goto out;
+
+out:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+/*
+ * GPIO chip
+ */
+static int ub953_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
+{
+ struct ub953_data *priv = gpiochip_get_data(gc);
+ int ret;
+ u8 v;
+
+ ret = ub953_read(priv, UB953_REG_GPIO_INPUT_CTRL, &v);
+ if (ret)
+ return ret;
+
+ if (v & UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset))
+ return GPIO_LINE_DIRECTION_IN;
+ else
+ return GPIO_LINE_DIRECTION_OUT;
+}
+
+static int ub953_gpio_direction_in(struct gpio_chip *gc, unsigned int offset)
+{
+ struct ub953_data *priv = gpiochip_get_data(gc);
+
+ return regmap_update_bits(
+ priv->regmap, UB953_REG_GPIO_INPUT_CTRL,
+ UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset) |
+ UB953_REG_GPIO_INPUT_CTRL_OUT_EN(offset),
+ UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset));
+}
+
+static int ub953_gpio_direction_out(struct gpio_chip *gc, unsigned int offset,
+ int value)
+{
+ struct ub953_data *priv = gpiochip_get_data(gc);
+ int ret;
+
+ ret = regmap_update_bits(
+ priv->regmap, UB953_REG_LOCAL_GPIO_DATA,
+ UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset),
+ value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) : 0);
+
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(
+ priv->regmap, UB953_REG_GPIO_INPUT_CTRL,
+ UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset) |
+ UB953_REG_GPIO_INPUT_CTRL_OUT_EN(offset),
+ UB953_REG_GPIO_INPUT_CTRL_OUT_EN(offset));
+}
+
+static int ub953_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct ub953_data *priv = gpiochip_get_data(gc);
+ int ret;
+ u8 v;
+
+ ret = ub953_read(priv, UB953_REG_GPIO_PIN_STS, &v);
+ if (ret)
+ return ret;
+
+ return !!(v & UB953_REG_GPIO_PIN_STS_GPIO_STS(offset));
+}
+
+static void ub953_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
+{
+ struct ub953_data *priv = gpiochip_get_data(gc);
+
+ regmap_update_bits(
+ priv->regmap, UB953_REG_LOCAL_GPIO_DATA,
+ UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset),
+ value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) : 0);
+}
+
+static int ub953_gpio_of_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec,
+ u32 *flags)
+{
+ if (flags)
+ *flags = gpiospec->args[1];
+
+ return gpiospec->args[0];
+}
+
+static int ub953_gpiochip_probe(struct ub953_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct gpio_chip *gc = &priv->gpio_chip;
+ int ret;
+
+ /* Set all GPIOs to local input mode */
+ ub953_write(priv, UB953_REG_LOCAL_GPIO_DATA, 0);
+ ub953_write(priv, UB953_REG_GPIO_INPUT_CTRL, 0xf);
+
+ scnprintf(priv->gpio_chip_name, sizeof(priv->gpio_chip_name), "%s",
+ dev_name(dev));
+
+ gc->label = priv->gpio_chip_name;
+ gc->parent = dev;
+ gc->owner = THIS_MODULE;
+ gc->base = -1;
+ gc->can_sleep = 1;
+ gc->ngpio = UB953_NUM_GPIOS;
+ gc->get_direction = ub953_gpio_get_direction;
+ gc->direction_input = ub953_gpio_direction_in;
+ gc->direction_output = ub953_gpio_direction_out;
+ gc->get = ub953_gpio_get;
+ gc->set = ub953_gpio_set;
+ gc->of_xlate = ub953_gpio_of_xlate;
+ gc->of_node = priv->client->dev.of_node;
+ gc->of_gpio_n_cells = 2;
+
+ ret = gpiochip_add_data(gc, priv);
+ if (ret) {
+ dev_err(dev, "Failed to add GPIOs: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ub953_gpiochip_remove(struct ub953_data *priv)
+{
+ gpiochip_remove(&priv->gpio_chip);
+}
+
+/*
+ * V4L2
+ */
+
+static int _ub953_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_krouting *routing)
+{
+ static const struct v4l2_mbus_framefmt format = {
+ .width = 640,
+ .height = 480,
+ .code = MEDIA_BUS_FMT_UYVY8_1X16,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .ycbcr_enc = V4L2_YCBCR_ENC_601,
+ .quantization = V4L2_QUANTIZATION_LIM_RANGE,
+ .xfer_func = V4L2_XFER_FUNC_SRGB,
+ };
+ int ret;
+
+ /*
+ * Note: we can only support up to V4L2_FRAME_DESC_ENTRY_MAX, until
+ * frame desc is made dynamically allocated.
+ */
+
+ if (routing->num_routes > V4L2_FRAME_DESC_ENTRY_MAX)
+ return -EINVAL;
+
+ ret = v4l2_subdev_routing_validate(sd, routing,
+ V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
+ if (ret)
+ return ret;
+
+ ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ub953_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ enum v4l2_subdev_format_whence which,
+ struct v4l2_subdev_krouting *routing)
+{
+ struct ub953_data *priv = sd_to_ub953(sd);
+
+ if (which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->enabled_source_streams)
+ return -EBUSY;
+
+ return _ub953_set_routing(sd, state, routing);
+}
+
+static int ub953_get_source_frame_desc(struct ub953_data *priv,
+ struct v4l2_mbus_frame_desc *desc)
+{
+ struct media_pad *pad;
+ int ret;
+
+ pad = media_pad_remote_pad_first(&priv->pads[UB953_PAD_SINK]);
+ if (!pad)
+ return -EPIPE;
+
+ ret = v4l2_subdev_call(priv->source_sd, pad, get_frame_desc, pad->index,
+ desc);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ub953_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+ struct v4l2_mbus_frame_desc *fd)
+{
+ struct ub953_data *priv = sd_to_ub953(sd);
+ const struct v4l2_subdev_krouting *routing;
+ struct v4l2_mbus_frame_desc source_fd;
+ struct v4l2_subdev_route *route;
+ struct v4l2_subdev_state *state;
+ int ret;
+
+ if (pad != UB953_PAD_SOURCE)
+ return -EINVAL;
+
+ ret = ub953_get_source_frame_desc(priv, &source_fd);
+ if (ret)
+ return ret;
+
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ routing = &state->routing;
+
+ memset(fd, 0, sizeof(*fd));
+
+ fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
+
+ for_each_active_route(routing, route) {
+ struct v4l2_mbus_frame_desc_entry *source_entry = NULL;
+ unsigned int i;
+
+ if (route->source_pad != pad)
+ continue;
+
+ for (i = 0; i < source_fd.num_entries; ++i)
+ if (source_fd.entry[i].stream == route->sink_stream) {
+ source_entry = &source_fd.entry[i];
+ break;
+ }
+
+ if (!source_entry) {
+ dev_err(&priv->client->dev,
+ "Failed to find stream from source frame desc\n");
+ ret = -EPIPE;
+ goto out;
+ }
+
+ fd->entry[fd->num_entries].stream = route->source_stream;
+ fd->entry[fd->num_entries].flags = source_entry->flags;
+ fd->entry[fd->num_entries].length = source_entry->length;
+ fd->entry[fd->num_entries].pixelcode = source_entry->pixelcode;
+ fd->entry[fd->num_entries].bus.csi2.vc =
+ source_entry->bus.csi2.vc;
+ fd->entry[fd->num_entries].bus.csi2.dt =
+ source_entry->bus.csi2.dt;
+
+ fd->num_entries++;
+ }
+
+out:
+ v4l2_subdev_unlock_state(state);
+
+ return ret;
+}
+
+static int ub953_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *format)
+{
+ struct ub953_data *priv = sd_to_ub953(sd);
+ struct v4l2_mbus_framefmt *fmt;
+
+ if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE &&
+ priv->enabled_source_streams)
+ return -EBUSY;
+
+ /* No transcoding, source and sink formats must match. */
+ if (format->pad == UB953_PAD_SOURCE)
+ return v4l2_subdev_get_fmt(sd, state, format);
+
+ /* Set sink format */
+ fmt = v4l2_subdev_state_get_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = format->format;
+
+ /* Propagate to source format */
+ fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = format->format;
+
+ return 0;
+}
+
+static int ub953_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ struct v4l2_subdev_route routes[] = {
+ {
+ .sink_pad = UB953_PAD_SINK,
+ .sink_stream = 0,
+ .source_pad = UB953_PAD_SOURCE,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ };
+
+ struct v4l2_subdev_krouting routing = {
+ .num_routes = ARRAY_SIZE(routes),
+ .routes = routes,
+ };
+
+ return _ub953_set_routing(sd, state, &routing);
+}
+
+static int ub953_log_status(struct v4l2_subdev *sd)
+{
+ struct ub953_data *priv = sd_to_ub953(sd);
+ struct device *dev = &priv->client->dev;
+ u8 v = 0, v1 = 0, v2 = 0;
+ unsigned int i;
+ char id[7];
+ u8 gpio_local_data;
+ u8 gpio_input_ctrl;
+ u8 gpio_pin_sts;
+
+ for (i = 0; i < 6; ++i)
+ ub953_read(priv, UB953_REG_FPD3_RX_ID(i), &id[i]);
+ id[6] = 0;
+
+ dev_info(dev, "ID '%s'\n", id);
+
+ ub953_read(priv, UB953_REG_GENERAL_STATUS, &v);
+ dev_info(dev, "GENERAL_STATUS %#x\n", v);
+
+ ub953_read(priv, UB953_REG_CRC_ERR_CNT1, &v1);
+ ub953_read(priv, UB953_REG_CRC_ERR_CNT2, &v2);
+ dev_info(dev, "CRC error count %u\n", v1 | (v2 << 8));
+
+ ub953_read(priv, UB953_REG_CSI_ERR_CNT, &v);
+ dev_info(dev, "CSI error count %u\n", v);
+
+ ub953_read(priv, UB953_REG_CSI_ERR_STATUS, &v);
+ dev_info(dev, "CSI_ERR_STATUS %#x\n", v);
+
+ ub953_read(priv, UB953_REG_CSI_ERR_DLANE01, &v);
+ dev_info(dev, "CSI_ERR_DLANE01 %#x\n", v);
+
+ ub953_read(priv, UB953_REG_CSI_ERR_DLANE23, &v);
+ dev_info(dev, "CSI_ERR_DLANE23 %#x\n", v);
+
+ ub953_read(priv, UB953_REG_CSI_ERR_CLK_LANE, &v);
+ dev_info(dev, "CSI_ERR_CLK_LANE %#x\n", v);
+
+ ub953_read(priv, UB953_REG_CSI_PKT_HDR_VC_ID, &v);
+ dev_info(dev, "CSI packet header VC %u ID %u\n", v >> 6, v & 0x3f);
+
+ ub953_read(priv, UB953_REG_PKT_HDR_WC_LSB, &v1);
+ ub953_read(priv, UB953_REG_PKT_HDR_WC_MSB, &v2);
+ dev_info(dev, "CSI packet header WC %u\n", (v2 << 8) | v1);
+
+ ub953_read(priv, UB953_REG_CSI_ECC, &v);
+ dev_info(dev, "CSI ECC %#x\n", v);
+
+ ub953_read(priv, UB953_REG_LOCAL_GPIO_DATA, &gpio_local_data);
+ ub953_read(priv, UB953_REG_GPIO_INPUT_CTRL, &gpio_input_ctrl);
+ ub953_read(priv, UB953_REG_GPIO_PIN_STS, &gpio_pin_sts);
+
+ for (i = 0; i < UB953_NUM_GPIOS; ++i) {
+ dev_info(dev,
+ "GPIO%u: remote: %u is_input: %u is_output: %u val: %u sts: %u\n",
+ i,
+ !!(gpio_local_data & UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(i)),
+ !!(gpio_input_ctrl & UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(i)),
+ !!(gpio_input_ctrl & UB953_REG_GPIO_INPUT_CTRL_OUT_EN(i)),
+ !!(gpio_local_data & UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(i)),
+ !!(gpio_pin_sts & UB953_REG_GPIO_PIN_STS_GPIO_STS(i)));
+ }
+
+ return 0;
+}
+
+static int ub953_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct ub953_data *priv = sd_to_ub953(sd);
+ struct media_pad *remote_pad;
+ u64 sink_streams;
+ int ret;
+
+ if (streams_mask & priv->enabled_source_streams)
+ return -EALREADY;
+
+ sink_streams = v4l2_subdev_state_xlate_streams(
+ state, UB953_PAD_SOURCE, UB953_PAD_SINK, &streams_mask);
+
+ remote_pad = media_pad_remote_pad_first(&priv->pads[UB953_PAD_SINK]);
+
+ ret = v4l2_subdev_enable_streams(priv->source_sd, remote_pad->index,
+ sink_streams);
+ if (ret)
+ return ret;
+
+ priv->enabled_source_streams |= streams_mask;
+
+ return 0;
+}
+
+static int ub953_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct ub953_data *priv = sd_to_ub953(sd);
+ struct media_pad *remote_pad;
+ int ret;
+ u64 sink_streams;
+
+ if ((streams_mask & priv->enabled_source_streams) != streams_mask)
+ return -EALREADY;
+
+ sink_streams = v4l2_subdev_state_xlate_streams(
+ state, UB953_PAD_SOURCE, UB953_PAD_SINK, &streams_mask);
+
+ remote_pad = media_pad_remote_pad_first(&priv->pads[UB953_PAD_SINK]);
+
+ ret = v4l2_subdev_disable_streams(priv->source_sd, remote_pad->index,
+ sink_streams);
+ if (ret)
+ return ret;
+
+ priv->enabled_source_streams &= ~streams_mask;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_pad_ops ub953_pad_ops = {
+ .enable_streams = ub953_enable_streams,
+ .disable_streams = ub953_disable_streams,
+ .set_routing = ub953_set_routing,
+ .get_frame_desc = ub953_get_frame_desc,
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = ub953_set_fmt,
+ .init_cfg = ub953_init_cfg,
+};
+
+static const struct v4l2_subdev_core_ops ub953_subdev_core_ops = {
+ .log_status = ub953_log_status,
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_ops ub953_subdev_ops = {
+ .core = &ub953_subdev_core_ops,
+ .pad = &ub953_pad_ops,
+};
+
+static const struct media_entity_operations ub953_entity_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+enum {
+ TEST_PATTERN_DISABLED = 0,
+ TEST_PATTERN_V_COLOR_BARS_1,
+ TEST_PATTERN_V_COLOR_BARS_2,
+ TEST_PATTERN_V_COLOR_BARS_4,
+ TEST_PATTERN_V_COLOR_BARS_8,
+};
+
+static const char *const ub953_tpg_qmenu[] = {
+ "Disabled",
+ "1 vertical color bar",
+ "2 vertical color bars",
+ "4 vertical color bars",
+ "8 vertical color bars",
+};
+
+static int ub953_enable_tpg(struct ub953_data *priv, int tpg_num)
+{
+ struct v4l2_subdev *sd = &priv->sd;
+ struct v4l2_subdev_state *state;
+ struct v4l2_mbus_framefmt *fmt;
+ u8 vbp, vfp;
+ u16 blank_lines;
+ u16 width;
+ u16 height;
+
+ u16 bytespp = 2; /* For MEDIA_BUS_FMT_UYVY8_1X16 */
+ u8 cbars_idx = tpg_num - TEST_PATTERN_V_COLOR_BARS_1;
+ u8 num_cbars = 1 << cbars_idx;
+
+ u16 line_size; /* Line size [bytes] */
+ u16 bar_size; /* cbar size [bytes] */
+ u16 act_lpf; /* active lines/frame */
+ u16 tot_lpf; /* tot lines/frame */
+ u16 line_pd; /* Line period in 10-ns units */
+
+ u16 fps = 30;
+
+ vbp = 33;
+ vfp = 10;
+ blank_lines = vbp + vfp + 2; /* total blanking lines */
+
+ state = v4l2_subdev_get_locked_active_state(sd);
+
+ if (state->routing.num_routes != 1)
+ return -EINVAL;
+
+ fmt = v4l2_subdev_state_get_stream_format(state, UB953_PAD_SOURCE, 0);
+ if (!fmt)
+ return -EINVAL;
+
+ if (fmt->code != MEDIA_BUS_FMT_UYVY8_1X16)
+ return -EINVAL;
+
+ width = fmt->width;
+ height = fmt->height;
+
+ line_size = width * bytespp;
+ bar_size = line_size / num_cbars;
+ act_lpf = height;
+ tot_lpf = act_lpf + blank_lines;
+ line_pd = 100000000 / fps / tot_lpf;
+
+ ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CTL,
+ UB953_IND_PGEN_CTL_PGEN_ENABLE);
+
+ /* YUV422 8bit: 2 bytes/block, CSI-2 data type 0x1e */
+ ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CFG,
+ cbars_idx << 4 | 0x2);
+ ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CSI_DI,
+ 0x1e);
+
+ ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
+ UB953_IND_PGEN_LINE_SIZE1, line_size);
+ ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
+ UB953_IND_PGEN_BAR_SIZE1, bar_size);
+ ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
+ UB953_IND_PGEN_ACT_LPF1, act_lpf);
+ ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
+ UB953_IND_PGEN_TOT_LPF1, tot_lpf);
+ ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
+ UB953_IND_PGEN_LINE_PD1, line_pd);
+ ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_VBP,
+ vbp);
+ ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_VFP,
+ vfp);
+
+ return 0;
+}
+
+static void ub953_disable_tpg(struct ub953_data *priv)
+{
+ ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CTL,
+ 0x0);
+}
+
+static int ub953_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct ub953_data *priv =
+ container_of(ctrl->handler, struct ub953_data, ctrl_handler);
+ int ret = 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_TEST_PATTERN:
+ if (ctrl->val == 0)
+ ub953_disable_tpg(priv);
+ else
+ ret = ub953_enable_tpg(priv, ctrl->val);
+ break;
+ }
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops ub953_ctrl_ops = {
+ .s_ctrl = ub953_s_ctrl,
+};
+
+static int ub953_notify_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *source_subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct ub953_data *priv = sd_to_ub953(notifier->sd);
+ struct device *dev = &priv->client->dev;
+ unsigned int src_pad;
+ int ret;
+
+ ret = media_entity_get_fwnode_pad(&source_subdev->entity,
+ source_subdev->fwnode,
+ MEDIA_PAD_FL_SOURCE);
+ if (ret < 0) {
+ dev_err(dev, "Failed to find pad for %s\n",
+ source_subdev->name);
+ return ret;
+ }
+
+ priv->source_sd = source_subdev;
+ src_pad = ret;
+
+ ret = media_create_pad_link(
+ &source_subdev->entity, src_pad, &priv->sd.entity, 0,
+ MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
+ if (ret) {
+ dev_err(dev, "Unable to link %s:%u -> %s:0\n",
+ source_subdev->name, src_pad, priv->sd.name);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_async_notifier_operations ub953_notify_ops = {
+ .bound = ub953_notify_bound,
+};
+
+static int ub953_v4l2_notifier_register(struct ub953_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct v4l2_async_subdev *asd;
+ struct device_node *ep_node;
+ int ret;
+
+ ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
+ if (!ep_node) {
+ dev_err(dev, "No graph endpoint\n");
+ return -ENODEV;
+ }
+
+ v4l2_async_nf_init(&priv->notifier);
+
+ asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier,
+ of_fwnode_handle(ep_node),
+ struct v4l2_async_subdev);
+
+ of_node_put(ep_node);
+
+ if (IS_ERR(asd)) {
+ dev_err(dev, "Failed to add subdev: %ld", PTR_ERR(asd));
+ v4l2_async_nf_cleanup(&priv->notifier);
+ return PTR_ERR(asd);
+ }
+
+ priv->notifier.ops = &ub953_notify_ops;
+
+ ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier);
+ if (ret) {
+ dev_err(dev, "Failed to register subdev_notifier");
+ v4l2_async_nf_cleanup(&priv->notifier);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ub953_v4l2_notifier_unregister(struct ub953_data *priv)
+{
+ v4l2_async_nf_unregister(&priv->notifier);
+ v4l2_async_nf_cleanup(&priv->notifier);
+}
+
+/*
+ * Probing
+ */
+
+static int ub953_i2c_master_init(struct ub953_data *priv)
+{
+ /* i2c fast mode */
+ u32 ref = 26250000;
+ u32 scl_high = 915; /* ns */
+ u32 scl_low = 1641; /* ns */
+ int ret;
+
+ scl_high = div64_u64((u64)scl_high * ref, 1000000000) - 5;
+ scl_low = div64_u64((u64)scl_low * ref, 1000000000) - 5;
+
+ ret = ub953_write(priv, UB953_REG_SCL_HIGH_TIME, scl_high);
+ if (ret)
+ return ret;
+
+ ret = ub953_write(priv, UB953_REG_SCL_LOW_TIME, scl_low);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static u64 ub953_get_fc_rate(struct ub953_data *priv)
+{
+ if (priv->hw_data->ub971) {
+ switch (priv->mode) {
+ case UB953_MODE_SYNC:
+ return priv->plat_data->bc_rate * 160ull;
+ default:
+ /* Not supported */
+ return 0;
+ }
+ } else {
+ switch (priv->mode) {
+ case UB953_MODE_SYNC:
+ return priv->plat_data->bc_rate / 2 * 160ull;
+ default:
+ /* Not supported */
+ return 0;
+ }
+ }
+}
+
+static unsigned long ub953_calc_clkout_ub953(struct ub953_data *priv,
+ unsigned long target, u64 fc,
+ u8 *hs_div, u8 *m, u8 *n)
+{
+ /*
+ * We always use 4 as a pre-divider (HS_CLK_DIV = 2).
+ *
+ * According to the datasheet:
+ * - "HS_CLK_DIV typically should be set to either 16, 8, or 4 (default)."
+ * - "if it is not possible to have an integer ratio of N/M, it is best to
+ * select a smaller value for HS_CLK_DIV.
+ *
+ * For above reasons the default HS_CLK_DIV seems the best in the average
+ * case. Use always that value to keep the code simple.
+ */
+ static const unsigned long hs_clk_div = 4;
+
+ u64 fc_divided;
+ unsigned long mul, div;
+ unsigned long res;
+
+ /* clkout = fc / hs_clk_div * m / n */
+
+ fc_divided = div_u64(fc, hs_clk_div);
+
+ rational_best_approximation(target, fc_divided, (1 << 5) - 1,
+ (1 << 8) - 1, &mul, &div);
+
+ res = div_u64(fc_divided * mul, div);
+
+ *hs_div = hs_clk_div;
+ *m = mul;
+ *n = div;
+
+ return res;
+}
+
+static unsigned long ub953_calc_clkout_ub971(struct ub953_data *priv,
+ unsigned long target, u64 fc,
+ u8 *m, u8 *n)
+{
+ u64 fc_divided;
+ unsigned long mul, div;
+ unsigned long res;
+
+ /* clkout = fc * m / (8 * n) */
+
+ fc_divided = div_u64(fc, 8);
+
+ rational_best_approximation(target, fc_divided, (1 << 5) - 1,
+ (1 << 8) - 1, &mul, &div);
+
+ res = div_u64(fc_divided * mul, div);
+
+ *m = mul;
+ *n = div;
+
+ return res;
+}
+
+static unsigned long ub953_clkout_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct ub953_data *priv = container_of(hw, struct ub953_data, clkout_clk_hw);
+ struct device *dev = &priv->client->dev;
+ u8 ctrl0, ctrl1;
+ u32 mul, div;
+ u64 fc_rate;
+ u32 hs_clk_div;
+ u64 rate;
+ int ret;
+
+ ret = ub953_read(priv, UB953_REG_CLKOUT_CTRL0, &ctrl0);
+ if (ret) {
+ dev_err(dev, "Failed to read CLKOUT_CTRL0: %d\n", ret);
+ return 0;
+ }
+
+ ret = ub953_read(priv, UB953_REG_CLKOUT_CTRL1, &ctrl1);
+ if (ret) {
+ dev_err(dev, "Failed to read CLKOUT_CTRL1: %d\n", ret);
+ return 0;
+ }
+
+ fc_rate = ub953_get_fc_rate(priv);
+
+ if (priv->hw_data->ub971) {
+ mul = ctrl0 & 0x1f;
+ div = ctrl1;
+
+ if (div == 0)
+ return 0;
+
+ rate = div_u64(fc_rate * mul, 8 * div);
+
+ dev_dbg(dev, "clkout: fc rate %llu, mul %u, div %u = %llu\n",
+ fc_rate, mul, div, rate);
+ } else {
+ mul = ctrl0 & 0x1f;
+ hs_clk_div = 1 << (ctrl0 >> 5);
+ div = ctrl1;
+
+ if (div == 0)
+ return 0;
+
+ rate = div_u64(div_u64(fc_rate, hs_clk_div) * mul, div);
+
+ dev_dbg(dev,
+ "clkout: fc rate %llu, hs_clk_div %u, mul %u, div %u = %llu\n",
+ fc_rate, hs_clk_div, mul, div, rate);
+ }
+
+ return rate;
+}
+
+static long ub953_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct ub953_data *priv = container_of(hw, struct ub953_data, clkout_clk_hw);
+ struct device *dev = &priv->client->dev;
+ unsigned long res;
+ u64 fc_rate;
+ u8 hs_div, m, n;
+
+ fc_rate = ub953_get_fc_rate(priv);
+
+ if (priv->hw_data->ub971) {
+ res = ub953_calc_clkout_ub971(priv, rate, fc_rate, &m, &n);
+
+ dev_dbg(dev,
+ "%s %llu * %u / (8 * %u) = %lu (requested %lu)",
+ __func__, fc_rate, m, n, res, rate);
+ } else {
+ res = ub953_calc_clkout_ub953(priv, rate, fc_rate, &hs_div, &m, &n);
+
+ dev_dbg(dev,
+ "%s %llu / %u * %u / %u = %lu (requested %lu)",
+ __func__, fc_rate, hs_div, m, n, res, rate);
+ }
+
+ return res;
+}
+
+static int ub953_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct ub953_data *priv = container_of(hw, struct ub953_data, clkout_clk_hw);
+ u64 fc_rate;
+ u8 hs_div, m, n;
+ unsigned long res;
+
+ fc_rate = ub953_get_fc_rate(priv);
+
+ if (priv->hw_data->ub971) {
+ res = ub953_calc_clkout_ub971(priv, rate, fc_rate, &m, &n);
+
+ ub953_write(priv, UB953_REG_CLKOUT_CTRL0, m);
+ ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
+ } else {
+ res = ub953_calc_clkout_ub953(priv, rate, fc_rate, &hs_div, &m, &n);
+
+ ub953_write(priv, UB953_REG_CLKOUT_CTRL0, (__ffs(hs_div) << 5) | m);
+ ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
+ }
+
+ dev_dbg(&priv->client->dev,
+ "%s %lu (requested %lu)\n", __func__, res, rate);
+
+ return 0;
+}
+
+static const struct clk_ops ub953_clkout_ops = {
+ .recalc_rate = ub953_clkout_recalc_rate,
+ .round_rate = ub953_clkout_round_rate,
+ .set_rate = ub953_clkout_set_rate,
+};
+
+static void ub953_init_clkout_ub953(struct ub953_data *priv)
+{
+ u64 fc_rate;
+ u8 hs_div, m, n;
+
+ fc_rate = ub953_get_fc_rate(priv);
+
+ ub953_calc_clkout_ub953(priv, 25000000, fc_rate, &hs_div, &m, &n);
+
+ ub953_write(priv, UB953_REG_CLKOUT_CTRL0, (__ffs(hs_div) << 5) | m);
+ ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
+}
+
+static void ub953_init_clkout_ub971(struct ub953_data *priv)
+{
+ u64 fc_rate;
+ u8 m, n;
+
+ fc_rate = ub953_get_fc_rate(priv);
+
+ ub953_calc_clkout_ub971(priv, 25000000, fc_rate, &m, &n);
+
+ ub953_write(priv, UB953_REG_CLKOUT_CTRL0, m);
+ ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
+}
+
+static int ub953_register_clkout(struct ub953_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ const struct clk_init_data init = {
+ .name = kasprintf(GFP_KERNEL, "ds90%s.%s.clk_out",
+ priv->hw_data->model, dev_name(dev)),
+ .ops = &ub953_clkout_ops,
+ };
+ int ret;
+
+ /* Initialize clkout to 25MHz by default */
+ if (priv->hw_data->ub971)
+ ub953_init_clkout_ub971(priv);
+ else
+ ub953_init_clkout_ub953(priv);
+
+ priv->clkout_clk_hw.init = &init;
+
+ ret = devm_clk_hw_register(dev, &priv->clkout_clk_hw);
+ kfree(init.name);
+ if (ret)
+ return dev_err_probe(dev, ret, "Cannot register clock HW\n");
+
+ ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,
+ &priv->clkout_clk_hw);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Cannot add OF clock provider\n");
+
+ return 0;
+}
+
+static int ub953_add_i2c_adapter(struct ub953_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct fwnode_handle *i2c_handle;
+ int ret;
+
+ i2c_handle = device_get_named_child_node(dev, "i2c");
+ if (!i2c_handle)
+ return 0;
+
+ ret = i2c_atr_add_adapter(priv->plat_data->atr, priv->plat_data->port,
+ i2c_handle);
+
+ fwnode_handle_put(i2c_handle);
+
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct regmap_config ub953_regmap_config = {
+ .name = "ds90ub953",
+ .reg_bits = 8,
+ .val_bits = 8,
+ .reg_format_endian = REGMAP_ENDIAN_DEFAULT,
+ .val_format_endian = REGMAP_ENDIAN_DEFAULT,
+};
+
+static int ub953_parse_dt(struct ub953_data *priv)
+{
+ struct device_node *np = priv->client->dev.of_node;
+ struct device *dev = &priv->client->dev;
+ struct device_node *ep_np;
+ int ret;
+
+ if (!np) {
+ dev_err(dev, "OF: no device tree node!\n");
+ return -ENOENT;
+ }
+
+ ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
+ if (!ep_np) {
+ dev_err(dev, "OF: no endpoint\n");
+ return -ENOENT;
+ }
+
+ ret = of_property_count_u32_elems(ep_np, "data-lanes");
+
+ of_node_put(ep_np);
+
+ if (ret <= 0) {
+ dev_err(dev, "OF: failed to parse data-lanes: %d\n", ret);
+ return ret;
+ }
+
+ if (ret != 1 && ret != 2 && ret != 4) {
+ dev_err(dev, "OF: bad number of data-lanes: %d\n", ret);
+ return -EINVAL;
+ }
+
+ priv->num_data_lanes = ret;
+
+ return 0;
+}
+
+static int ub953_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ub953_data *priv;
+ int ret;
+ u8 v;
+ bool mode_override;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->client = client;
+
+ priv->hw_data = of_device_get_match_data(dev);
+ if (!priv->hw_data)
+ return -ENODEV;
+
+ priv->plat_data = dev_get_platdata(&client->dev);
+ if (!priv->plat_data) {
+ dev_err(dev, "Platform data missing\n");
+ return -ENODEV;
+ }
+
+ mutex_init(&priv->reg_lock);
+
+ /*
+ * Initialize to invalid values so that the first reg writes will
+ * configure the target.
+ */
+ priv->current_indirect_target = 0xff;
+
+ priv->regmap = devm_regmap_init_i2c(client, &ub953_regmap_config);
+ if (IS_ERR(priv->regmap)) {
+ dev_err(dev, "Failed to init regmap\n");
+ ret = PTR_ERR(priv->regmap);
+ goto err_mutex_destroy;
+ }
+
+ ret = ub953_parse_dt(priv);
+ if (ret)
+ goto err_mutex_destroy;
+
+ ret = ub953_read(priv, UB953_REG_MODE_SEL, &v);
+ if (ret)
+ goto err_mutex_destroy;
+
+ if (!(v & UB953_REG_MODE_SEL_MODE_DONE)) {
+ dev_err(dev, "Mode value not stabilized\n");
+ ret = -ENODEV;
+ goto err_mutex_destroy;
+ }
+
+ mode_override = v & UB953_REG_MODE_SEL_MODE_OVERRIDE;
+
+ switch (v & UB953_REG_MODE_SEL_MODE_MASK) {
+ case 0:
+ priv->mode = UB953_MODE_SYNC;
+ break;
+ case 2:
+ priv->mode = UB953_MODE_NONSYNC_EXT;
+ break;
+ case 3:
+ priv->mode = UB953_MODE_NONSYNC_INT;
+ break;
+ case 5:
+ priv->mode = UB953_MODE_DVP;
+ break;
+ default:
+ dev_err(dev, "Illegal mode in mode register\n");
+ ret = -ENODEV;
+ goto err_mutex_destroy;
+ }
+
+ dev_dbg(dev, "mode from %s: %#x\n", mode_override ? "reg" : "strap",
+ priv->mode);
+
+ if (priv->mode != UB953_MODE_SYNC) {
+ dev_err(dev, "Only synchronous mode supported\n");
+ ret = -ENODEV;
+ goto err_mutex_destroy;
+ }
+
+ ret = ub953_read(priv, UB953_REG_REV_MASK_ID, &v);
+ if (ret) {
+ dev_err(dev, "Failed to read revision: %d", ret);
+ goto err_mutex_destroy;
+ }
+
+ dev_info(dev, "Found %s rev/mask %#04x\n", priv->hw_data->model, v);
+
+ ret = ub953_read(priv, UB953_REG_GENERAL_CFG, &v);
+ if (ret)
+ goto err_mutex_destroy;
+
+ dev_dbg(dev, "i2c strap setting %s V\n",
+ (v & UB953_REG_GENERAL_CFG_I2C_STRAP_MODE) ? "1.8" : "3.3");
+
+ ret = ub953_i2c_master_init(priv);
+ if (ret) {
+ dev_err(dev, "i2c init failed: %d\n", ret);
+ goto err_mutex_destroy;
+ }
+
+ ret = ub953_gpiochip_probe(priv);
+ if (ret) {
+ dev_err(dev, "Failed to init gpiochip\n");
+ goto err_mutex_destroy;
+ }
+
+ ub953_write(priv, UB953_REG_GENERAL_CFG,
+ UB953_REG_GENERAL_CFG_CONT_CLK |
+ ((priv->num_data_lanes - 1) << UB953_REG_GENERAL_CFG_CSI_LANE_SEL_SHIFT) |
+ UB953_REG_GENERAL_CFG_CRC_TX_GEN_ENABLE);
+
+ ret = ub953_register_clkout(priv);
+ if (ret) {
+ dev_err(dev, "Failed to register clkout\n");
+ goto err_gpiochip_remove;
+ }
+
+ v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub953_subdev_ops);
+
+ v4l2_ctrl_handler_init(&priv->ctrl_handler,
+ ARRAY_SIZE(ub953_tpg_qmenu) - 1);
+ priv->sd.ctrl_handler = &priv->ctrl_handler;
+
+ v4l2_ctrl_new_std_menu_items(&priv->ctrl_handler, &ub953_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(ub953_tpg_qmenu) - 1, 0, 0,
+ ub953_tpg_qmenu);
+
+ if (priv->ctrl_handler.error) {
+ ret = priv->ctrl_handler.error;
+ goto err_gpiochip_remove;
+ }
+
+ priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS |
+ V4L2_SUBDEV_FL_STREAMS;
+ priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ priv->sd.entity.ops = &ub953_entity_ops;
+
+ priv->pads[0].flags = MEDIA_PAD_FL_SINK;
+ priv->pads[1].flags = MEDIA_PAD_FL_SOURCE;
+
+ ret = media_entity_pads_init(&priv->sd.entity, 2, priv->pads);
+ if (ret) {
+ dev_err(dev, "Failed to init pads\n");
+ goto err_remove_ctrls;
+ }
+
+ priv->tx_ep_np = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
+ priv->sd.fwnode = of_fwnode_handle(priv->tx_ep_np);
+
+ priv->sd.state_lock = priv->sd.ctrl_handler->lock;
+
+ ret = v4l2_subdev_init_finalize(&priv->sd);
+ if (ret)
+ goto err_entity_cleanup;
+
+ ret = ub953_v4l2_notifier_register(priv);
+ if (ret) {
+ dev_err(dev, "v4l2 subdev notifier register failed: %d\n", ret);
+ goto err_free_state;
+ }
+
+ ret = v4l2_async_register_subdev(&priv->sd);
+ if (ret) {
+ dev_err(dev, "v4l2_async_register_subdev error: %d\n", ret);
+ goto err_unreg_notif;
+ }
+
+ ret = ub953_add_i2c_adapter(priv);
+ if (ret) {
+ dev_err(dev, "failed to add remote i2c adapter\n");
+ goto err_unreg_async_subdev;
+ }
+
+ return 0;
+
+err_unreg_async_subdev:
+ v4l2_async_unregister_subdev(&priv->sd);
+err_unreg_notif:
+ ub953_v4l2_notifier_unregister(priv);
+err_free_state:
+ v4l2_subdev_cleanup(&priv->sd);
+err_entity_cleanup:
+ if (priv->tx_ep_np)
+ of_node_put(priv->tx_ep_np);
+
+ media_entity_cleanup(&priv->sd.entity);
+err_remove_ctrls:
+ v4l2_ctrl_handler_free(&priv->ctrl_handler);
+err_gpiochip_remove:
+ ub953_gpiochip_remove(priv);
+err_mutex_destroy:
+ mutex_destroy(&priv->reg_lock);
+
+ return ret;
+}
+
+static void ub953_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ub953_data *priv = sd_to_ub953(sd);
+
+ i2c_atr_del_adapter(priv->plat_data->atr,
+ priv->plat_data->port);
+
+ v4l2_async_unregister_subdev(&priv->sd);
+
+ ub953_v4l2_notifier_unregister(priv);
+
+ v4l2_subdev_cleanup(&priv->sd);
+
+ of_node_put(priv->tx_ep_np);
+
+ media_entity_cleanup(&priv->sd.entity);
+
+ v4l2_ctrl_handler_free(&priv->ctrl_handler);
+
+ ub953_gpiochip_remove(priv);
+ mutex_destroy(&priv->reg_lock);
+}
+
+static const struct ub953_hw_data ds90ub953_hw = {
+ .model = "ub953",
+};
+
+static const struct ub953_hw_data ds90ub971_hw = {
+ .model = "ub971",
+ .ub971 = true,
+};
+
+static const struct i2c_device_id ub953_id[] = {
+ { "ds90ub953-q1", 0 },
+ { "ds90ub971-q1", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, ub953_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id ub953_dt_ids[] = {
+ { .compatible = "ti,ds90ub953-q1", .data = &ds90ub953_hw },
+ { .compatible = "ti,ds90ub971-q1", .data = &ds90ub971_hw },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ub953_dt_ids);
+#endif
+
+static struct i2c_driver ds90ub953_driver = {
+ .probe_new = ub953_probe,
+ .remove = ub953_remove,
+ .id_table = ub953_id,
+ .driver = {
+ .name = "ds90ub953",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(ub953_dt_ids),
+ },
+};
+
+module_i2c_driver(ds90ub953_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Texas Instruments DS90UB953 serializer driver");
+MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
+MODULE_IMPORT_NS(I2C_ATR);
--
2.34.1
^ permalink raw reply related [flat|nested] 33+ messages in thread* Re: [PATCH v6 8/8] media: i2c: add DS90UB953 driver
2023-01-05 14:03 ` [PATCH v6 8/8] media: i2c: add DS90UB953 driver Tomi Valkeinen
@ 2023-01-08 4:23 ` Laurent Pinchart
2023-01-09 14:19 ` Tomi Valkeinen
0 siblings, 1 reply; 33+ messages in thread
From: Laurent Pinchart @ 2023-01-08 4:23 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
Hi Tomi,
Thank you for the patch.
I won't repeat here the comments made on 7/8 that also apply to this
patch.
On Thu, Jan 05, 2023 at 04:03:07PM +0200, Tomi Valkeinen wrote:
> Add driver for TI DS90UB953 FPD-Link III Serializer.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> ---
> drivers/media/i2c/Kconfig | 13 +
> drivers/media/i2c/Makefile | 1 +
> drivers/media/i2c/ds90ub953.c | 1590 +++++++++++++++++++++++++++++++++
> 3 files changed, 1604 insertions(+)
> create mode 100644 drivers/media/i2c/ds90ub953.c
>
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index eb312d6e9cf6..29594c724307 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -1614,6 +1614,19 @@ config VIDEO_DS90UB913
> Device driver for the Texas Instruments DS90UB913
> FPD-Link III Serializer.
>
> +config VIDEO_DS90UB953
> + tristate "TI DS90UB953 Serializer"
I'd mention the DS90UB971 too.
> + depends on OF && I2C && VIDEO_DEV
> + select MEDIA_CONTROLLER
> + select VIDEO_V4L2_SUBDEV_API
> + select V4L2_FWNODE
> + select REGMAP_I2C
> + select OF_GPIO
> + select I2C_ATR
> + help
> + Device driver for the Texas Instruments DS90UB953
> + FPD-Link III Serializer and DS90UB971 FPD-Link IV Serializer.
> +
> config VIDEO_DS90UB960
> tristate "TI DS90UB960 Deserializer"
> depends on OF && I2C && VIDEO_DEV
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index c4875ec8c3b9..efd5f717a5f7 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -143,4 +143,5 @@ obj-$(CONFIG_VIDEO_VS6624) += vs6624.o
> obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
> obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
> obj-$(CONFIG_VIDEO_DS90UB913) += ds90ub913.o
> +obj-$(CONFIG_VIDEO_DS90UB953) += ds90ub953.o
> obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
> diff --git a/drivers/media/i2c/ds90ub953.c b/drivers/media/i2c/ds90ub953.c
> new file mode 100644
> index 000000000000..251dc8e8adfa
> --- /dev/null
> +++ b/drivers/media/i2c/ds90ub953.c
> @@ -0,0 +1,1590 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for the Texas Instruments DS90UB953 video serializer
> + *
> + * Based on a driver from Luca Ceresoli <luca@lucaceresoli.net>
> + *
> + * Copyright (c) 2019 Luca Ceresoli <luca@lucaceresoli.net>
> + * Copyright (c) 2022 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/gpio/driver.h>
> +#include <linux/i2c-atr.h>
> +#include <linux/i2c.h>
> +#include <linux/kernel.h>
> +#include <linux/math64.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/of_graph.h>
> +#include <linux/rational.h>
> +#include <linux/regmap.h>
> +
> +#include <media/i2c/ds90ub9xx.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-subdev.h>
> +
> +#define UB953_PAD_SINK 0
> +#define UB953_PAD_SOURCE 1
> +
> +#define UB953_NUM_GPIOS 4
> +
> +#define UB953_REG_RESET_CTL 0x01
> +#define UB953_REG_RESET_CTL_DIGITAL_RESET_1 BIT(1)
> +#define UB953_REG_RESET_CTL_DIGITAL_RESET_0 BIT(0)
> +
> +#define UB953_REG_GENERAL_CFG 0x02
> +#define UB953_REG_GENERAL_CFG_CONT_CLK BIT(6)
> +#define UB953_REG_GENERAL_CFG_CSI_LANE_SEL_SHIFT 4
> +#define UB953_REG_GENERAL_CFG_CSI_LANE_SEL_MASK GENMASK(5, 4)
> +#define UB953_REG_GENERAL_CFG_CRC_TX_GEN_ENABLE BIT(1)
> +#define UB953_REG_GENERAL_CFG_I2C_STRAP_MODE BIT(0)
> +
> +#define UB953_REG_MODE_SEL 0x03
> +#define UB953_REG_MODE_SEL_MODE_DONE BIT(3)
> +#define UB953_REG_MODE_SEL_MODE_OVERRIDE BIT(4)
> +#define UB953_REG_MODE_SEL_MODE_MASK GENMASK(2, 0)
> +
> +#define UB953_REG_CLKOUT_CTRL0 0x06
> +#define UB953_REG_CLKOUT_CTRL1 0x07
> +
> +#define UB953_REG_SCL_HIGH_TIME 0x0B
> +#define UB953_REG_SCL_LOW_TIME 0x0C
> +
> +#define UB953_REG_LOCAL_GPIO_DATA 0x0d
> +#define UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(n) BIT(4 + (n))
> +#define UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(n) BIT(0 + (n))
> +
> +#define UB953_REG_GPIO_INPUT_CTRL 0x0e
> +#define UB953_REG_GPIO_INPUT_CTRL_OUT_EN(n) BIT(4 + (n))
> +#define UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(n) BIT(0 + (n))
> +
> +#define UB953_REG_REV_MASK_ID 0x50
> +#define UB953_REG_GENERAL_STATUS 0x52
> +
> +#define UB953_REG_GPIO_PIN_STS 0x53
> +#define UB953_REG_GPIO_PIN_STS_GPIO_STS(n) BIT(0 + (n))
> +
> +#define UB953_REG_BIST_ERR_CNT 0x54
> +#define UB953_REG_CRC_ERR_CNT1 0x55
> +#define UB953_REG_CRC_ERR_CNT2 0x56
> +
> +#define UB953_REG_CSI_ERR_CNT 0x5c
> +#define UB953_REG_CSI_ERR_STATUS 0x5D
> +#define UB953_REG_CSI_ERR_DLANE01 0x5E
> +#define UB953_REG_CSI_ERR_DLANE23 0x5F
> +#define UB953_REG_CSI_ERR_CLK_LANE 0x60
> +#define UB953_REG_CSI_PKT_HDR_VC_ID 0x61
> +#define UB953_REG_PKT_HDR_WC_LSB 0x62
> +#define UB953_REG_PKT_HDR_WC_MSB 0x63
> +#define UB953_REG_CSI_ECC 0x64
> +
> +#define UB953_REG_IND_ACC_CTL 0xb0
> +#define UB953_REG_IND_ACC_ADDR 0xb1
> +#define UB953_REG_IND_ACC_DATA 0xb2
> +
> +#define UB953_REG_FPD3_RX_ID(n) (0xf0 + (n))
> +
> +/* Indirect register blocks */
> +#define UB953_IND_TARGET_PAT_GEN 0x00
> +#define UB953_IND_TARGET_FPD3_TX 0x01
> +#define UB953_IND_TARGET_DIE_ID 0x02
> +
> +#define UB953_IND_PGEN_CTL 0x01
> +#define UB953_IND_PGEN_CTL_PGEN_ENABLE BIT(0)
> +#define UB953_IND_PGEN_CFG 0x02
> +#define UB953_IND_PGEN_CSI_DI 0x03
> +#define UB953_IND_PGEN_LINE_SIZE1 0x04
> +#define UB953_IND_PGEN_LINE_SIZE0 0x05
> +#define UB953_IND_PGEN_BAR_SIZE1 0x06
> +#define UB953_IND_PGEN_BAR_SIZE0 0x07
> +#define UB953_IND_PGEN_ACT_LPF1 0x08
> +#define UB953_IND_PGEN_ACT_LPF0 0x09
> +#define UB953_IND_PGEN_TOT_LPF1 0x0A
> +#define UB953_IND_PGEN_TOT_LPF0 0x0B
> +#define UB953_IND_PGEN_LINE_PD1 0x0C
> +#define UB953_IND_PGEN_LINE_PD0 0x0D
> +#define UB953_IND_PGEN_VBP 0x0E
> +#define UB953_IND_PGEN_VFP 0x0F
> +#define UB953_IND_PGEN_COLOR(n) (0x10 + (n)) /* n <= 15 */
> +
> +/* Note: Only sync mode supported for now */
> +enum ub953_mode {
> + /* FPD-Link III CSI-2 synchronous mode */
> + UB953_MODE_SYNC,
> + /* FPD-Link III CSI-2 non-synchronous mode, external ref clock */
> + UB953_MODE_NONSYNC_EXT,
> + /* FPD-Link III CSI-2 non-synchronous mode, internal ref clock */
> + UB953_MODE_NONSYNC_INT,
> + /* FPD-Link III DVP mode */
> + UB953_MODE_DVP,
> +};
> +
> +struct ub953_hw_data {
> + const char *model;
> + bool ub971;
Maybe is_ub971, although a model enum could be nicer. Up to you.
> +};
> +
> +struct ub953_data {
> + const struct ub953_hw_data *hw_data;
> +
> + struct i2c_client *client;
> + struct regmap *regmap;
> +
> + u32 num_data_lanes;
> +
> + struct gpio_chip gpio_chip;
> + char gpio_chip_name[64];
> +
> + struct v4l2_subdev sd;
> + struct media_pad pads[2];
> +
> + struct v4l2_async_notifier notifier;
> +
> + struct v4l2_subdev *source_sd;
> +
> + struct v4l2_ctrl_handler ctrl_handler;
> +
> + u64 enabled_source_streams;
> +
> + struct device_node *tx_ep_np;
> +
> + /* lock for register access */
> + struct mutex reg_lock;
Why is this needed, can you access registers from multiple contexts ?
> +
> + u8 current_indirect_target;
> +
> + struct clk_hw clkout_clk_hw;
> +
> + enum ub953_mode mode;
> +
> + struct ds90ub9xx_platform_data *plat_data;
> +};
> +
> +static inline struct ub953_data *sd_to_ub953(struct v4l2_subdev *sd)
> +{
> + return container_of(sd, struct ub953_data, sd);
> +}
> +
> +/*
> + * HW Access
> + */
> +
> +static int ub953_read(struct ub953_data *priv, u8 reg, u8 *val)
> +{
> + unsigned int v;
> + int ret;
> +
> + mutex_lock(&priv->reg_lock);
> +
> + ret = regmap_read(priv->regmap, reg, &v);
> + if (ret)
> + dev_err(&priv->client->dev,
> + "Cannot read register 0x%02x: %d!\n", reg, ret);
> + else
> + *val = v;
> +
> + mutex_unlock(&priv->reg_lock);
> +
> + return ret;
> +}
> +
> +static int ub953_write(struct ub953_data *priv, u8 reg, u8 val)
> +{
> + int ret;
> +
> + mutex_lock(&priv->reg_lock);
> +
> + ret = regmap_write(priv->regmap, reg, val);
> + if (ret)
> + dev_err(&priv->client->dev,
> + "Cannot write register 0x%02x: %d!\n", reg, ret);
> +
> + mutex_unlock(&priv->reg_lock);
> +
> + return ret;
> +}
> +
> +static int _ub953_select_ind_reg_block(struct ub953_data *priv, u8 block)
> +{
> + struct device *dev = &priv->client->dev;
> + int ret;
> +
> + if (priv->current_indirect_target == block)
> + return 0;
> +
> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_CTL, block << 2);
> + if (ret) {
> + dev_err(dev, "%s: cannot select indirect target %u (%d)!\n",
> + __func__, block, ret);
> + return ret;
> + }
> +
> + priv->current_indirect_target = block;
> +
> + return 0;
> +}
> +
> +__maybe_unused
Looks like it's more than maybe unused, it's never used at all. Can the
function be dropped ?
> +static int ub953_read_ind(struct ub953_data *priv, u8 block, u8 reg, u8 *val)
> +{
> + unsigned int v;
> + int ret;
> +
> + mutex_lock(&priv->reg_lock);
> +
> + ret = _ub953_select_ind_reg_block(priv, block);
> + if (ret)
> + goto out;
> +
> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg);
> + if (ret)
> + goto out;
> +
> + ret = regmap_read(priv->regmap, UB953_REG_IND_ACC_DATA, &v);
> + if (ret)
> + goto out;
> +
> + *val = v;
> +
> +out:
> + mutex_unlock(&priv->reg_lock);
> +
> + return ret;
> +}
> +
> +static int ub953_write_ind(struct ub953_data *priv, u8 block, u8 reg, u8 val)
> +{
> + int ret;
> +
> + mutex_lock(&priv->reg_lock);
> +
> + ret = _ub953_select_ind_reg_block(priv, block);
> + if (ret)
> + goto out;
> +
> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg);
> + if (ret)
> + goto out;
> +
> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_DATA, val);
> +
> +out:
> + mutex_unlock(&priv->reg_lock);
> +
An error message would be useful on failure. Same in the next function.
> + return ret;
> +}
> +
> +static int ub953_write_ind16(struct ub953_data *priv, u8 block, u8 reg, u16 val)
> +{
> + int ret;
> +
> + mutex_lock(&priv->reg_lock);
> +
> + ret = _ub953_select_ind_reg_block(priv, block);
> + if (ret)
> + goto out;
> +
> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg);
> + if (ret)
> + goto out;
> +
> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_DATA, val >> 8);
> + if (ret)
> + goto out;
> +
> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg + 1);
There's no auto-increment ? :-(
> + if (ret)
> + goto out;
> +
> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_DATA, val & 0xff);
> + if (ret)
> + goto out;
> +
> +out:
> + mutex_unlock(&priv->reg_lock);
> +
> + return ret;
> +}
> +
> +/*
> + * GPIO chip
> + */
> +static int ub953_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
> +{
> + struct ub953_data *priv = gpiochip_get_data(gc);
> + int ret;
> + u8 v;
> +
> + ret = ub953_read(priv, UB953_REG_GPIO_INPUT_CTRL, &v);
> + if (ret)
> + return ret;
> +
> + if (v & UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset))
> + return GPIO_LINE_DIRECTION_IN;
> + else
> + return GPIO_LINE_DIRECTION_OUT;
> +}
> +
> +static int ub953_gpio_direction_in(struct gpio_chip *gc, unsigned int offset)
> +{
> + struct ub953_data *priv = gpiochip_get_data(gc);
> +
> + return regmap_update_bits(
> + priv->regmap, UB953_REG_GPIO_INPUT_CTRL,
> + UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset) |
> + UB953_REG_GPIO_INPUT_CTRL_OUT_EN(offset),
> + UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset));
> +}
> +
> +static int ub953_gpio_direction_out(struct gpio_chip *gc, unsigned int offset,
> + int value)
> +{
> + struct ub953_data *priv = gpiochip_get_data(gc);
> + int ret;
> +
> + ret = regmap_update_bits(
> + priv->regmap, UB953_REG_LOCAL_GPIO_DATA,
> + UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset),
> + value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) : 0);
> +
> + if (ret)
> + return ret;
> +
> + return regmap_update_bits(
> + priv->regmap, UB953_REG_GPIO_INPUT_CTRL,
> + UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset) |
> + UB953_REG_GPIO_INPUT_CTRL_OUT_EN(offset),
> + UB953_REG_GPIO_INPUT_CTRL_OUT_EN(offset));
> +}
> +
> +static int ub953_gpio_get(struct gpio_chip *gc, unsigned int offset)
> +{
> + struct ub953_data *priv = gpiochip_get_data(gc);
> + int ret;
> + u8 v;
> +
> + ret = ub953_read(priv, UB953_REG_GPIO_PIN_STS, &v);
> + if (ret)
> + return ret;
> +
> + return !!(v & UB953_REG_GPIO_PIN_STS_GPIO_STS(offset));
> +}
> +
> +static void ub953_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
> +{
> + struct ub953_data *priv = gpiochip_get_data(gc);
> +
> + regmap_update_bits(
> + priv->regmap, UB953_REG_LOCAL_GPIO_DATA,
> + UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset),
> + value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) : 0);
> +}
> +
> +static int ub953_gpio_of_xlate(struct gpio_chip *gc,
> + const struct of_phandle_args *gpiospec,
> + u32 *flags)
> +{
> + if (flags)
> + *flags = gpiospec->args[1];
> +
> + return gpiospec->args[0];
> +}
> +
> +static int ub953_gpiochip_probe(struct ub953_data *priv)
> +{
> + struct device *dev = &priv->client->dev;
> + struct gpio_chip *gc = &priv->gpio_chip;
> + int ret;
> +
> + /* Set all GPIOs to local input mode */
> + ub953_write(priv, UB953_REG_LOCAL_GPIO_DATA, 0);
> + ub953_write(priv, UB953_REG_GPIO_INPUT_CTRL, 0xf);
> +
> + scnprintf(priv->gpio_chip_name, sizeof(priv->gpio_chip_name), "%s",
> + dev_name(dev));
> +
> + gc->label = priv->gpio_chip_name;
> + gc->parent = dev;
> + gc->owner = THIS_MODULE;
> + gc->base = -1;
> + gc->can_sleep = 1;
> + gc->ngpio = UB953_NUM_GPIOS;
> + gc->get_direction = ub953_gpio_get_direction;
> + gc->direction_input = ub953_gpio_direction_in;
> + gc->direction_output = ub953_gpio_direction_out;
> + gc->get = ub953_gpio_get;
> + gc->set = ub953_gpio_set;
> + gc->of_xlate = ub953_gpio_of_xlate;
> + gc->of_node = priv->client->dev.of_node;
> + gc->of_gpio_n_cells = 2;
> +
> + ret = gpiochip_add_data(gc, priv);
> + if (ret) {
> + dev_err(dev, "Failed to add GPIOs: %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static void ub953_gpiochip_remove(struct ub953_data *priv)
> +{
> + gpiochip_remove(&priv->gpio_chip);
> +}
> +
> +/*
> + * V4L2
> + */
> +
> +static int _ub953_set_routing(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_krouting *routing)
> +{
> + static const struct v4l2_mbus_framefmt format = {
> + .width = 640,
> + .height = 480,
> + .code = MEDIA_BUS_FMT_UYVY8_1X16,
> + .field = V4L2_FIELD_NONE,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + .ycbcr_enc = V4L2_YCBCR_ENC_601,
> + .quantization = V4L2_QUANTIZATION_LIM_RANGE,
> + .xfer_func = V4L2_XFER_FUNC_SRGB,
> + };
> + int ret;
> +
> + /*
> + * Note: we can only support up to V4L2_FRAME_DESC_ENTRY_MAX, until
> + * frame desc is made dynamically allocated.
> + */
> +
> + if (routing->num_routes > V4L2_FRAME_DESC_ENTRY_MAX)
> + return -EINVAL;
> +
> + ret = v4l2_subdev_routing_validate(sd, routing,
> + V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
> + if (ret)
> + return ret;
> +
> + ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int ub953_set_routing(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + enum v4l2_subdev_format_whence which,
> + struct v4l2_subdev_krouting *routing)
> +{
> + struct ub953_data *priv = sd_to_ub953(sd);
> +
> + if (which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->enabled_source_streams)
> + return -EBUSY;
> +
> + return _ub953_set_routing(sd, state, routing);
> +}
> +
> +static int ub953_get_source_frame_desc(struct ub953_data *priv,
> + struct v4l2_mbus_frame_desc *desc)
> +{
> + struct media_pad *pad;
> + int ret;
> +
> + pad = media_pad_remote_pad_first(&priv->pads[UB953_PAD_SINK]);
> + if (!pad)
> + return -EPIPE;
> +
> + ret = v4l2_subdev_call(priv->source_sd, pad, get_frame_desc, pad->index,
> + desc);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int ub953_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
> + struct v4l2_mbus_frame_desc *fd)
> +{
> + struct ub953_data *priv = sd_to_ub953(sd);
> + const struct v4l2_subdev_krouting *routing;
> + struct v4l2_mbus_frame_desc source_fd;
> + struct v4l2_subdev_route *route;
> + struct v4l2_subdev_state *state;
> + int ret;
> +
> + if (pad != UB953_PAD_SOURCE)
> + return -EINVAL;
> +
> + ret = ub953_get_source_frame_desc(priv, &source_fd);
> + if (ret)
> + return ret;
> +
> + state = v4l2_subdev_lock_and_get_active_state(sd);
> +
> + routing = &state->routing;
> +
> + memset(fd, 0, sizeof(*fd));
> +
> + fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
> +
> + for_each_active_route(routing, route) {
> + struct v4l2_mbus_frame_desc_entry *source_entry = NULL;
> + unsigned int i;
> +
> + if (route->source_pad != pad)
> + continue;
> +
> + for (i = 0; i < source_fd.num_entries; ++i)
> + if (source_fd.entry[i].stream == route->sink_stream) {
> + source_entry = &source_fd.entry[i];
> + break;
> + }
> +
> + if (!source_entry) {
> + dev_err(&priv->client->dev,
> + "Failed to find stream from source frame desc\n");
> + ret = -EPIPE;
> + goto out;
> + }
> +
> + fd->entry[fd->num_entries].stream = route->source_stream;
> + fd->entry[fd->num_entries].flags = source_entry->flags;
> + fd->entry[fd->num_entries].length = source_entry->length;
> + fd->entry[fd->num_entries].pixelcode = source_entry->pixelcode;
> + fd->entry[fd->num_entries].bus.csi2.vc =
> + source_entry->bus.csi2.vc;
> + fd->entry[fd->num_entries].bus.csi2.dt =
> + source_entry->bus.csi2.dt;
> +
> + fd->num_entries++;
> + }
> +
> +out:
> + v4l2_subdev_unlock_state(state);
> +
> + return ret;
> +}
> +
> +static int ub953_set_fmt(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_format *format)
> +{
> + struct ub953_data *priv = sd_to_ub953(sd);
> + struct v4l2_mbus_framefmt *fmt;
> +
> + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE &&
> + priv->enabled_source_streams)
> + return -EBUSY;
> +
> + /* No transcoding, source and sink formats must match. */
> + if (format->pad == UB953_PAD_SOURCE)
> + return v4l2_subdev_get_fmt(sd, state, format);
> +
> + /* Set sink format */
> + fmt = v4l2_subdev_state_get_stream_format(state, format->pad,
> + format->stream);
> + if (!fmt)
> + return -EINVAL;
> +
> + *fmt = format->format;
> +
> + /* Propagate to source format */
> + fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
> + format->stream);
> + if (!fmt)
> + return -EINVAL;
> +
> + *fmt = format->format;
> +
> + return 0;
> +}
> +
> +static int ub953_init_cfg(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state)
> +{
> + struct v4l2_subdev_route routes[] = {
> + {
> + .sink_pad = UB953_PAD_SINK,
> + .sink_stream = 0,
> + .source_pad = UB953_PAD_SOURCE,
> + .source_stream = 0,
> + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
> + },
> + };
> +
> + struct v4l2_subdev_krouting routing = {
> + .num_routes = ARRAY_SIZE(routes),
> + .routes = routes,
> + };
> +
> + return _ub953_set_routing(sd, state, &routing);
> +}
> +
> +static int ub953_log_status(struct v4l2_subdev *sd)
> +{
> + struct ub953_data *priv = sd_to_ub953(sd);
> + struct device *dev = &priv->client->dev;
> + u8 v = 0, v1 = 0, v2 = 0;
> + unsigned int i;
> + char id[7];
> + u8 gpio_local_data;
> + u8 gpio_input_ctrl;
> + u8 gpio_pin_sts;
> +
> + for (i = 0; i < 6; ++i)
> + ub953_read(priv, UB953_REG_FPD3_RX_ID(i), &id[i]);
> + id[6] = 0;
> +
> + dev_info(dev, "ID '%s'\n", id);
> +
> + ub953_read(priv, UB953_REG_GENERAL_STATUS, &v);
> + dev_info(dev, "GENERAL_STATUS %#x\n", v);
> +
> + ub953_read(priv, UB953_REG_CRC_ERR_CNT1, &v1);
> + ub953_read(priv, UB953_REG_CRC_ERR_CNT2, &v2);
> + dev_info(dev, "CRC error count %u\n", v1 | (v2 << 8));
> +
> + ub953_read(priv, UB953_REG_CSI_ERR_CNT, &v);
> + dev_info(dev, "CSI error count %u\n", v);
> +
> + ub953_read(priv, UB953_REG_CSI_ERR_STATUS, &v);
> + dev_info(dev, "CSI_ERR_STATUS %#x\n", v);
> +
> + ub953_read(priv, UB953_REG_CSI_ERR_DLANE01, &v);
> + dev_info(dev, "CSI_ERR_DLANE01 %#x\n", v);
> +
> + ub953_read(priv, UB953_REG_CSI_ERR_DLANE23, &v);
> + dev_info(dev, "CSI_ERR_DLANE23 %#x\n", v);
> +
> + ub953_read(priv, UB953_REG_CSI_ERR_CLK_LANE, &v);
> + dev_info(dev, "CSI_ERR_CLK_LANE %#x\n", v);
> +
> + ub953_read(priv, UB953_REG_CSI_PKT_HDR_VC_ID, &v);
> + dev_info(dev, "CSI packet header VC %u ID %u\n", v >> 6, v & 0x3f);
> +
> + ub953_read(priv, UB953_REG_PKT_HDR_WC_LSB, &v1);
> + ub953_read(priv, UB953_REG_PKT_HDR_WC_MSB, &v2);
> + dev_info(dev, "CSI packet header WC %u\n", (v2 << 8) | v1);
> +
> + ub953_read(priv, UB953_REG_CSI_ECC, &v);
> + dev_info(dev, "CSI ECC %#x\n", v);
> +
> + ub953_read(priv, UB953_REG_LOCAL_GPIO_DATA, &gpio_local_data);
> + ub953_read(priv, UB953_REG_GPIO_INPUT_CTRL, &gpio_input_ctrl);
> + ub953_read(priv, UB953_REG_GPIO_PIN_STS, &gpio_pin_sts);
> +
> + for (i = 0; i < UB953_NUM_GPIOS; ++i) {
> + dev_info(dev,
> + "GPIO%u: remote: %u is_input: %u is_output: %u val: %u sts: %u\n",
> + i,
> + !!(gpio_local_data & UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(i)),
> + !!(gpio_input_ctrl & UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(i)),
> + !!(gpio_input_ctrl & UB953_REG_GPIO_INPUT_CTRL_OUT_EN(i)),
> + !!(gpio_local_data & UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(i)),
> + !!(gpio_pin_sts & UB953_REG_GPIO_PIN_STS_GPIO_STS(i)));
> + }
> +
> + return 0;
> +}
> +
> +static int ub953_enable_streams(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state, u32 pad,
> + u64 streams_mask)
> +{
> + struct ub953_data *priv = sd_to_ub953(sd);
> + struct media_pad *remote_pad;
> + u64 sink_streams;
> + int ret;
> +
> + if (streams_mask & priv->enabled_source_streams)
> + return -EALREADY;
> +
> + sink_streams = v4l2_subdev_state_xlate_streams(
> + state, UB953_PAD_SOURCE, UB953_PAD_SINK, &streams_mask);
> +
> + remote_pad = media_pad_remote_pad_first(&priv->pads[UB953_PAD_SINK]);
> +
> + ret = v4l2_subdev_enable_streams(priv->source_sd, remote_pad->index,
> + sink_streams);
> + if (ret)
> + return ret;
> +
> + priv->enabled_source_streams |= streams_mask;
> +
> + return 0;
> +}
> +
> +static int ub953_disable_streams(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state, u32 pad,
> + u64 streams_mask)
> +{
> + struct ub953_data *priv = sd_to_ub953(sd);
> + struct media_pad *remote_pad;
> + int ret;
> + u64 sink_streams;
> +
> + if ((streams_mask & priv->enabled_source_streams) != streams_mask)
> + return -EALREADY;
> +
> + sink_streams = v4l2_subdev_state_xlate_streams(
> + state, UB953_PAD_SOURCE, UB953_PAD_SINK, &streams_mask);
> +
> + remote_pad = media_pad_remote_pad_first(&priv->pads[UB953_PAD_SINK]);
> +
> + ret = v4l2_subdev_disable_streams(priv->source_sd, remote_pad->index,
> + sink_streams);
> + if (ret)
> + return ret;
> +
> + priv->enabled_source_streams &= ~streams_mask;
> +
> + return 0;
> +}
> +
> +static const struct v4l2_subdev_pad_ops ub953_pad_ops = {
> + .enable_streams = ub953_enable_streams,
> + .disable_streams = ub953_disable_streams,
> + .set_routing = ub953_set_routing,
> + .get_frame_desc = ub953_get_frame_desc,
> + .get_fmt = v4l2_subdev_get_fmt,
> + .set_fmt = ub953_set_fmt,
> + .init_cfg = ub953_init_cfg,
> +};
> +
> +static const struct v4l2_subdev_core_ops ub953_subdev_core_ops = {
> + .log_status = ub953_log_status,
> + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
Align the = for all structures or for none.
> +};
> +
> +static const struct v4l2_subdev_ops ub953_subdev_ops = {
> + .core = &ub953_subdev_core_ops,
> + .pad = &ub953_pad_ops,
> +};
> +
> +static const struct media_entity_operations ub953_entity_ops = {
> + .link_validate = v4l2_subdev_link_validate,
> +};
> +
> +enum {
> + TEST_PATTERN_DISABLED = 0,
> + TEST_PATTERN_V_COLOR_BARS_1,
> + TEST_PATTERN_V_COLOR_BARS_2,
> + TEST_PATTERN_V_COLOR_BARS_4,
> + TEST_PATTERN_V_COLOR_BARS_8,
> +};
> +
> +static const char *const ub953_tpg_qmenu[] = {
> + "Disabled",
> + "1 vertical color bar",
> + "2 vertical color bars",
> + "4 vertical color bars",
> + "8 vertical color bars",
> +};
> +
> +static int ub953_enable_tpg(struct ub953_data *priv, int tpg_num)
> +{
> + struct v4l2_subdev *sd = &priv->sd;
> + struct v4l2_subdev_state *state;
> + struct v4l2_mbus_framefmt *fmt;
> + u8 vbp, vfp;
> + u16 blank_lines;
> + u16 width;
> + u16 height;
> +
> + u16 bytespp = 2; /* For MEDIA_BUS_FMT_UYVY8_1X16 */
> + u8 cbars_idx = tpg_num - TEST_PATTERN_V_COLOR_BARS_1;
> + u8 num_cbars = 1 << cbars_idx;
> +
> + u16 line_size; /* Line size [bytes] */
> + u16 bar_size; /* cbar size [bytes] */
> + u16 act_lpf; /* active lines/frame */
> + u16 tot_lpf; /* tot lines/frame */
> + u16 line_pd; /* Line period in 10-ns units */
> +
> + u16 fps = 30;
> +
> + vbp = 33;
> + vfp = 10;
> + blank_lines = vbp + vfp + 2; /* total blanking lines */
> +
> + state = v4l2_subdev_get_locked_active_state(sd);
> +
> + if (state->routing.num_routes != 1)
> + return -EINVAL;
> +
> + fmt = v4l2_subdev_state_get_stream_format(state, UB953_PAD_SOURCE, 0);
> + if (!fmt)
> + return -EINVAL;
> +
> + if (fmt->code != MEDIA_BUS_FMT_UYVY8_1X16)
> + return -EINVAL;
> +
> + width = fmt->width;
> + height = fmt->height;
> +
> + line_size = width * bytespp;
> + bar_size = line_size / num_cbars;
> + act_lpf = height;
> + tot_lpf = act_lpf + blank_lines;
> + line_pd = 100000000 / fps / tot_lpf;
> +
> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CTL,
> + UB953_IND_PGEN_CTL_PGEN_ENABLE);
> +
> + /* YUV422 8bit: 2 bytes/block, CSI-2 data type 0x1e */
> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CFG,
> + cbars_idx << 4 | 0x2);
> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CSI_DI,
> + 0x1e);
> +
> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
> + UB953_IND_PGEN_LINE_SIZE1, line_size);
> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
> + UB953_IND_PGEN_BAR_SIZE1, bar_size);
> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
> + UB953_IND_PGEN_ACT_LPF1, act_lpf);
> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
> + UB953_IND_PGEN_TOT_LPF1, tot_lpf);
> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
> + UB953_IND_PGEN_LINE_PD1, line_pd);
> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_VBP,
> + vbp);
> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_VFP,
> + vfp);
> +
> + return 0;
> +}
> +
> +static void ub953_disable_tpg(struct ub953_data *priv)
> +{
> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CTL,
> + 0x0);
> +}
> +
> +static int ub953_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct ub953_data *priv =
> + container_of(ctrl->handler, struct ub953_data, ctrl_handler);
> + int ret = 0;
> +
> + switch (ctrl->id) {
> + case V4L2_CID_TEST_PATTERN:
> + if (ctrl->val == 0)
> + ub953_disable_tpg(priv);
> + else
> + ret = ub953_enable_tpg(priv, ctrl->val);
> + break;
> + }
> +
> + return ret;
> +}
> +
> +static const struct v4l2_ctrl_ops ub953_ctrl_ops = {
> + .s_ctrl = ub953_s_ctrl,
> +};
> +
> +static int ub953_notify_bound(struct v4l2_async_notifier *notifier,
> + struct v4l2_subdev *source_subdev,
> + struct v4l2_async_subdev *asd)
> +{
> + struct ub953_data *priv = sd_to_ub953(notifier->sd);
> + struct device *dev = &priv->client->dev;
> + unsigned int src_pad;
> + int ret;
> +
> + ret = media_entity_get_fwnode_pad(&source_subdev->entity,
> + source_subdev->fwnode,
> + MEDIA_PAD_FL_SOURCE);
> + if (ret < 0) {
> + dev_err(dev, "Failed to find pad for %s\n",
> + source_subdev->name);
> + return ret;
> + }
> +
> + priv->source_sd = source_subdev;
> + src_pad = ret;
> +
> + ret = media_create_pad_link(
> + &source_subdev->entity, src_pad, &priv->sd.entity, 0,
> + MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
> + if (ret) {
> + dev_err(dev, "Unable to link %s:%u -> %s:0\n",
> + source_subdev->name, src_pad, priv->sd.name);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static const struct v4l2_async_notifier_operations ub953_notify_ops = {
> + .bound = ub953_notify_bound,
> +};
> +
> +static int ub953_v4l2_notifier_register(struct ub953_data *priv)
> +{
> + struct device *dev = &priv->client->dev;
> + struct v4l2_async_subdev *asd;
> + struct device_node *ep_node;
> + int ret;
> +
> + ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
s/0, 0/UB953_PAD_SINK, 0/
Similar comment for other calls to this function below.
> + if (!ep_node) {
> + dev_err(dev, "No graph endpoint\n");
> + return -ENODEV;
> + }
> +
> + v4l2_async_nf_init(&priv->notifier);
> +
> + asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier,
> + of_fwnode_handle(ep_node),
> + struct v4l2_async_subdev);
> +
> + of_node_put(ep_node);
> +
> + if (IS_ERR(asd)) {
> + dev_err(dev, "Failed to add subdev: %ld", PTR_ERR(asd));
> + v4l2_async_nf_cleanup(&priv->notifier);
> + return PTR_ERR(asd);
> + }
> +
> + priv->notifier.ops = &ub953_notify_ops;
> +
> + ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier);
> + if (ret) {
> + dev_err(dev, "Failed to register subdev_notifier");
> + v4l2_async_nf_cleanup(&priv->notifier);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static void ub953_v4l2_notifier_unregister(struct ub953_data *priv)
> +{
> + v4l2_async_nf_unregister(&priv->notifier);
> + v4l2_async_nf_cleanup(&priv->notifier);
> +}
> +
> +/*
> + * Probing
> + */
> +
> +static int ub953_i2c_master_init(struct ub953_data *priv)
> +{
> + /* i2c fast mode */
> + u32 ref = 26250000;
> + u32 scl_high = 915; /* ns */
> + u32 scl_low = 1641; /* ns */
> + int ret;
> +
> + scl_high = div64_u64((u64)scl_high * ref, 1000000000) - 5;
> + scl_low = div64_u64((u64)scl_low * ref, 1000000000) - 5;
> +
> + ret = ub953_write(priv, UB953_REG_SCL_HIGH_TIME, scl_high);
> + if (ret)
> + return ret;
> +
> + ret = ub953_write(priv, UB953_REG_SCL_LOW_TIME, scl_low);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static u64 ub953_get_fc_rate(struct ub953_data *priv)
> +{
> + if (priv->hw_data->ub971) {
> + switch (priv->mode) {
> + case UB953_MODE_SYNC:
> + return priv->plat_data->bc_rate * 160ull;
> + default:
> + /* Not supported */
> + return 0;
> + }
> + } else {
> + switch (priv->mode) {
> + case UB953_MODE_SYNC:
> + return priv->plat_data->bc_rate / 2 * 160ull;
> + default:
> + /* Not supported */
> + return 0;
> + }
> + }
This could be simplified to
if (priv->mode != UB953_MODE_SYNC)
/* Not supported */
return 0;
if (priv->hw_data->ub971)
return priv->plat_data->bc_rate * 160ull;
else
return priv->plat_data->bc_rate / 2 * 160ull;
> +}
> +
> +static unsigned long ub953_calc_clkout_ub953(struct ub953_data *priv,
> + unsigned long target, u64 fc,
> + u8 *hs_div, u8 *m, u8 *n)
> +{
> + /*
> + * We always use 4 as a pre-divider (HS_CLK_DIV = 2).
> + *
> + * According to the datasheet:
> + * - "HS_CLK_DIV typically should be set to either 16, 8, or 4 (default)."
> + * - "if it is not possible to have an integer ratio of N/M, it is best to
> + * select a smaller value for HS_CLK_DIV.
> + *
> + * For above reasons the default HS_CLK_DIV seems the best in the average
> + * case. Use always that value to keep the code simple.
> + */
> + static const unsigned long hs_clk_div = 4;
> +
> + u64 fc_divided;
> + unsigned long mul, div;
> + unsigned long res;
> +
> + /* clkout = fc / hs_clk_div * m / n */
> +
> + fc_divided = div_u64(fc, hs_clk_div);
> +
> + rational_best_approximation(target, fc_divided, (1 << 5) - 1,
> + (1 << 8) - 1, &mul, &div);
> +
> + res = div_u64(fc_divided * mul, div);
> +
> + *hs_div = hs_clk_div;
> + *m = mul;
> + *n = div;
> +
> + return res;
> +}
> +
> +static unsigned long ub953_calc_clkout_ub971(struct ub953_data *priv,
> + unsigned long target, u64 fc,
> + u8 *m, u8 *n)
> +{
> + u64 fc_divided;
> + unsigned long mul, div;
> + unsigned long res;
> +
> + /* clkout = fc * m / (8 * n) */
> +
> + fc_divided = div_u64(fc, 8);
> +
> + rational_best_approximation(target, fc_divided, (1 << 5) - 1,
> + (1 << 8) - 1, &mul, &div);
> +
> + res = div_u64(fc_divided * mul, div);
> +
> + *m = mul;
> + *n = div;
> +
> + return res;
> +}
> +
> +static unsigned long ub953_clkout_recalc_rate(struct clk_hw *hw,
> + unsigned long parent_rate)
> +{
> + struct ub953_data *priv = container_of(hw, struct ub953_data, clkout_clk_hw);
> + struct device *dev = &priv->client->dev;
> + u8 ctrl0, ctrl1;
> + u32 mul, div;
> + u64 fc_rate;
> + u32 hs_clk_div;
> + u64 rate;
> + int ret;
> +
> + ret = ub953_read(priv, UB953_REG_CLKOUT_CTRL0, &ctrl0);
> + if (ret) {
> + dev_err(dev, "Failed to read CLKOUT_CTRL0: %d\n", ret);
> + return 0;
> + }
> +
> + ret = ub953_read(priv, UB953_REG_CLKOUT_CTRL1, &ctrl1);
> + if (ret) {
> + dev_err(dev, "Failed to read CLKOUT_CTRL1: %d\n", ret);
> + return 0;
> + }
> +
> + fc_rate = ub953_get_fc_rate(priv);
> +
> + if (priv->hw_data->ub971) {
> + mul = ctrl0 & 0x1f;
> + div = ctrl1;
> +
> + if (div == 0)
> + return 0;
> +
> + rate = div_u64(fc_rate * mul, 8 * div);
> +
> + dev_dbg(dev, "clkout: fc rate %llu, mul %u, div %u = %llu\n",
> + fc_rate, mul, div, rate);
> + } else {
> + mul = ctrl0 & 0x1f;
> + hs_clk_div = 1 << (ctrl0 >> 5);
> + div = ctrl1;
> +
> + if (div == 0)
> + return 0;
> +
> + rate = div_u64(div_u64(fc_rate, hs_clk_div) * mul, div);
> +
> + dev_dbg(dev,
> + "clkout: fc rate %llu, hs_clk_div %u, mul %u, div %u = %llu\n",
> + fc_rate, hs_clk_div, mul, div, rate);
> + }
> +
> + return rate;
> +}
> +
> +static long ub953_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long *parent_rate)
> +{
> + struct ub953_data *priv = container_of(hw, struct ub953_data, clkout_clk_hw);
> + struct device *dev = &priv->client->dev;
> + unsigned long res;
> + u64 fc_rate;
> + u8 hs_div, m, n;
> +
> + fc_rate = ub953_get_fc_rate(priv);
> +
> + if (priv->hw_data->ub971) {
> + res = ub953_calc_clkout_ub971(priv, rate, fc_rate, &m, &n);
> +
> + dev_dbg(dev,
> + "%s %llu * %u / (8 * %u) = %lu (requested %lu)",
> + __func__, fc_rate, m, n, res, rate);
> + } else {
> + res = ub953_calc_clkout_ub953(priv, rate, fc_rate, &hs_div, &m, &n);
> +
> + dev_dbg(dev,
> + "%s %llu / %u * %u / %u = %lu (requested %lu)",
> + __func__, fc_rate, hs_div, m, n, res, rate);
> + }
> +
> + return res;
> +}
> +
> +static int ub953_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long parent_rate)
> +{
> + struct ub953_data *priv = container_of(hw, struct ub953_data, clkout_clk_hw);
> + u64 fc_rate;
> + u8 hs_div, m, n;
> + unsigned long res;
> +
> + fc_rate = ub953_get_fc_rate(priv);
> +
> + if (priv->hw_data->ub971) {
> + res = ub953_calc_clkout_ub971(priv, rate, fc_rate, &m, &n);
> +
> + ub953_write(priv, UB953_REG_CLKOUT_CTRL0, m);
> + ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
> + } else {
> + res = ub953_calc_clkout_ub953(priv, rate, fc_rate, &hs_div, &m, &n);
> +
> + ub953_write(priv, UB953_REG_CLKOUT_CTRL0, (__ffs(hs_div) << 5) | m);
> + ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
> + }
> +
> + dev_dbg(&priv->client->dev,
> + "%s %lu (requested %lu)\n", __func__, res, rate);
> +
> + return 0;
> +}
> +
> +static const struct clk_ops ub953_clkout_ops = {
> + .recalc_rate = ub953_clkout_recalc_rate,
> + .round_rate = ub953_clkout_round_rate,
> + .set_rate = ub953_clkout_set_rate,
> +};
> +
> +static void ub953_init_clkout_ub953(struct ub953_data *priv)
> +{
> + u64 fc_rate;
> + u8 hs_div, m, n;
> +
> + fc_rate = ub953_get_fc_rate(priv);
> +
> + ub953_calc_clkout_ub953(priv, 25000000, fc_rate, &hs_div, &m, &n);
> +
> + ub953_write(priv, UB953_REG_CLKOUT_CTRL0, (__ffs(hs_div) << 5) | m);
> + ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
> +}
> +
> +static void ub953_init_clkout_ub971(struct ub953_data *priv)
> +{
> + u64 fc_rate;
> + u8 m, n;
> +
> + fc_rate = ub953_get_fc_rate(priv);
> +
> + ub953_calc_clkout_ub971(priv, 25000000, fc_rate, &m, &n);
> +
> + ub953_write(priv, UB953_REG_CLKOUT_CTRL0, m);
> + ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
> +}
> +
> +static int ub953_register_clkout(struct ub953_data *priv)
> +{
> + struct device *dev = &priv->client->dev;
> + const struct clk_init_data init = {
> + .name = kasprintf(GFP_KERNEL, "ds90%s.%s.clk_out",
> + priv->hw_data->model, dev_name(dev)),
> + .ops = &ub953_clkout_ops,
> + };
> + int ret;
> +
> + /* Initialize clkout to 25MHz by default */
> + if (priv->hw_data->ub971)
> + ub953_init_clkout_ub971(priv);
> + else
> + ub953_init_clkout_ub953(priv);
> +
> + priv->clkout_clk_hw.init = &init;
> +
> + ret = devm_clk_hw_register(dev, &priv->clkout_clk_hw);
> + kfree(init.name);
> + if (ret)
> + return dev_err_probe(dev, ret, "Cannot register clock HW\n");
> +
> + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,
> + &priv->clkout_clk_hw);
> + if (ret)
> + return dev_err_probe(dev, ret,
> + "Cannot add OF clock provider\n");
> +
> + return 0;
> +}
> +
> +static int ub953_add_i2c_adapter(struct ub953_data *priv)
> +{
> + struct device *dev = &priv->client->dev;
> + struct fwnode_handle *i2c_handle;
> + int ret;
> +
> + i2c_handle = device_get_named_child_node(dev, "i2c");
> + if (!i2c_handle)
> + return 0;
> +
> + ret = i2c_atr_add_adapter(priv->plat_data->atr, priv->plat_data->port,
> + i2c_handle);
> +
> + fwnode_handle_put(i2c_handle);
> +
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static const struct regmap_config ub953_regmap_config = {
> + .name = "ds90ub953",
> + .reg_bits = 8,
> + .val_bits = 8,
> + .reg_format_endian = REGMAP_ENDIAN_DEFAULT,
> + .val_format_endian = REGMAP_ENDIAN_DEFAULT,
> +};
> +
> +static int ub953_parse_dt(struct ub953_data *priv)
> +{
> + struct device_node *np = priv->client->dev.of_node;
> + struct device *dev = &priv->client->dev;
> + struct device_node *ep_np;
> + int ret;
> +
> + if (!np) {
> + dev_err(dev, "OF: no device tree node!\n");
> + return -ENOENT;
> + }
> +
> + ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
> + if (!ep_np) {
> + dev_err(dev, "OF: no endpoint\n");
> + return -ENOENT;
> + }
> +
> + ret = of_property_count_u32_elems(ep_np, "data-lanes");
> +
> + of_node_put(ep_np);
> +
> + if (ret <= 0) {
> + dev_err(dev, "OF: failed to parse data-lanes: %d\n", ret);
> + return ret;
> + }
> +
> + if (ret != 1 && ret != 2 && ret != 4) {
> + dev_err(dev, "OF: bad number of data-lanes: %d\n", ret);
> + return -EINVAL;
> + }
> +
> + priv->num_data_lanes = ret;
> +
> + return 0;
> +}
> +
> +static int ub953_probe(struct i2c_client *client)
> +{
> + struct device *dev = &client->dev;
> + struct ub953_data *priv;
> + int ret;
> + u8 v;
> + bool mode_override;
> +
> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + priv->client = client;
> +
> + priv->hw_data = of_device_get_match_data(dev);
> + if (!priv->hw_data)
> + return -ENODEV;
> +
> + priv->plat_data = dev_get_platdata(&client->dev);
> + if (!priv->plat_data) {
> + dev_err(dev, "Platform data missing\n");
> + return -ENODEV;
> + }
> +
> + mutex_init(&priv->reg_lock);
> +
> + /*
> + * Initialize to invalid values so that the first reg writes will
> + * configure the target.
> + */
> + priv->current_indirect_target = 0xff;
> +
> + priv->regmap = devm_regmap_init_i2c(client, &ub953_regmap_config);
> + if (IS_ERR(priv->regmap)) {
> + dev_err(dev, "Failed to init regmap\n");
> + ret = PTR_ERR(priv->regmap);
> + goto err_mutex_destroy;
> + }
> +
> + ret = ub953_parse_dt(priv);
> + if (ret)
> + goto err_mutex_destroy;
> +
> + ret = ub953_read(priv, UB953_REG_MODE_SEL, &v);
> + if (ret)
> + goto err_mutex_destroy;
> +
> + if (!(v & UB953_REG_MODE_SEL_MODE_DONE)) {
> + dev_err(dev, "Mode value not stabilized\n");
> + ret = -ENODEV;
> + goto err_mutex_destroy;
> + }
> +
> + mode_override = v & UB953_REG_MODE_SEL_MODE_OVERRIDE;
> +
> + switch (v & UB953_REG_MODE_SEL_MODE_MASK) {
> + case 0:
> + priv->mode = UB953_MODE_SYNC;
> + break;
> + case 2:
> + priv->mode = UB953_MODE_NONSYNC_EXT;
> + break;
> + case 3:
> + priv->mode = UB953_MODE_NONSYNC_INT;
> + break;
> + case 5:
> + priv->mode = UB953_MODE_DVP;
> + break;
> + default:
> + dev_err(dev, "Illegal mode in mode register\n");
> + ret = -ENODEV;
> + goto err_mutex_destroy;
> + }
> +
> + dev_dbg(dev, "mode from %s: %#x\n", mode_override ? "reg" : "strap",
> + priv->mode);
> +
> + if (priv->mode != UB953_MODE_SYNC) {
> + dev_err(dev, "Only synchronous mode supported\n");
> + ret = -ENODEV;
> + goto err_mutex_destroy;
> + }
> +
> + ret = ub953_read(priv, UB953_REG_REV_MASK_ID, &v);
> + if (ret) {
> + dev_err(dev, "Failed to read revision: %d", ret);
> + goto err_mutex_destroy;
> + }
> +
> + dev_info(dev, "Found %s rev/mask %#04x\n", priv->hw_data->model, v);
> +
> + ret = ub953_read(priv, UB953_REG_GENERAL_CFG, &v);
> + if (ret)
> + goto err_mutex_destroy;
> +
> + dev_dbg(dev, "i2c strap setting %s V\n",
> + (v & UB953_REG_GENERAL_CFG_I2C_STRAP_MODE) ? "1.8" : "3.3");
Please move the hardware checks and initialization to a separate
function, probe() is too big.
> +
> + ret = ub953_i2c_master_init(priv);
> + if (ret) {
> + dev_err(dev, "i2c init failed: %d\n", ret);
> + goto err_mutex_destroy;
> + }
> +
> + ret = ub953_gpiochip_probe(priv);
> + if (ret) {
> + dev_err(dev, "Failed to init gpiochip\n");
> + goto err_mutex_destroy;
> + }
> +
> + ub953_write(priv, UB953_REG_GENERAL_CFG,
> + UB953_REG_GENERAL_CFG_CONT_CLK |
> + ((priv->num_data_lanes - 1) << UB953_REG_GENERAL_CFG_CSI_LANE_SEL_SHIFT) |
> + UB953_REG_GENERAL_CFG_CRC_TX_GEN_ENABLE);
This too.
> +
> + ret = ub953_register_clkout(priv);
> + if (ret) {
> + dev_err(dev, "Failed to register clkout\n");
> + goto err_gpiochip_remove;
> + }
> +
> + v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub953_subdev_ops);
> +
> + v4l2_ctrl_handler_init(&priv->ctrl_handler,
> + ARRAY_SIZE(ub953_tpg_qmenu) - 1);
> + priv->sd.ctrl_handler = &priv->ctrl_handler;
> +
> + v4l2_ctrl_new_std_menu_items(&priv->ctrl_handler, &ub953_ctrl_ops,
> + V4L2_CID_TEST_PATTERN,
> + ARRAY_SIZE(ub953_tpg_qmenu) - 1, 0, 0,
> + ub953_tpg_qmenu);
> +
> + if (priv->ctrl_handler.error) {
> + ret = priv->ctrl_handler.error;
> + goto err_gpiochip_remove;
> + }
> +
> + priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS |
> + V4L2_SUBDEV_FL_STREAMS;
> + priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
> + priv->sd.entity.ops = &ub953_entity_ops;
> +
> + priv->pads[0].flags = MEDIA_PAD_FL_SINK;
> + priv->pads[1].flags = MEDIA_PAD_FL_SOURCE;
> +
> + ret = media_entity_pads_init(&priv->sd.entity, 2, priv->pads);
> + if (ret) {
> + dev_err(dev, "Failed to init pads\n");
> + goto err_remove_ctrls;
> + }
> +
> + priv->tx_ep_np = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
Error handling ?
> + priv->sd.fwnode = of_fwnode_handle(priv->tx_ep_np);
> +
> + priv->sd.state_lock = priv->sd.ctrl_handler->lock;
> +
> + ret = v4l2_subdev_init_finalize(&priv->sd);
> + if (ret)
> + goto err_entity_cleanup;
I think I would move subdev init to a separate function too.
> +
> + ret = ub953_v4l2_notifier_register(priv);
> + if (ret) {
> + dev_err(dev, "v4l2 subdev notifier register failed: %d\n", ret);
> + goto err_free_state;
> + }
> +
> + ret = v4l2_async_register_subdev(&priv->sd);
> + if (ret) {
> + dev_err(dev, "v4l2_async_register_subdev error: %d\n", ret);
> + goto err_unreg_notif;
> + }
> +
> + ret = ub953_add_i2c_adapter(priv);
> + if (ret) {
> + dev_err(dev, "failed to add remote i2c adapter\n");
> + goto err_unreg_async_subdev;
> + }
> +
> + return 0;
> +
> +err_unreg_async_subdev:
> + v4l2_async_unregister_subdev(&priv->sd);
> +err_unreg_notif:
> + ub953_v4l2_notifier_unregister(priv);
> +err_free_state:
> + v4l2_subdev_cleanup(&priv->sd);
> +err_entity_cleanup:
> + if (priv->tx_ep_np)
> + of_node_put(priv->tx_ep_np);
> +
> + media_entity_cleanup(&priv->sd.entity);
> +err_remove_ctrls:
> + v4l2_ctrl_handler_free(&priv->ctrl_handler);
> +err_gpiochip_remove:
> + ub953_gpiochip_remove(priv);
> +err_mutex_destroy:
> + mutex_destroy(&priv->reg_lock);
> +
> + return ret;
> +}
> +
> +static void ub953_remove(struct i2c_client *client)
> +{
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct ub953_data *priv = sd_to_ub953(sd);
> +
> + i2c_atr_del_adapter(priv->plat_data->atr,
> + priv->plat_data->port);
> +
> + v4l2_async_unregister_subdev(&priv->sd);
> +
> + ub953_v4l2_notifier_unregister(priv);
> +
> + v4l2_subdev_cleanup(&priv->sd);
> +
> + of_node_put(priv->tx_ep_np);
> +
> + media_entity_cleanup(&priv->sd.entity);
> +
> + v4l2_ctrl_handler_free(&priv->ctrl_handler);
> +
> + ub953_gpiochip_remove(priv);
> + mutex_destroy(&priv->reg_lock);
> +}
> +
> +static const struct ub953_hw_data ds90ub953_hw = {
> + .model = "ub953",
> +};
> +
> +static const struct ub953_hw_data ds90ub971_hw = {
> + .model = "ub971",
> + .ub971 = true,
> +};
> +
> +static const struct i2c_device_id ub953_id[] = {
> + { "ds90ub953-q1", 0 },
> + { "ds90ub971-q1", 0 },
> + {}
> +};
> +MODULE_DEVICE_TABLE(i2c, ub953_id);
> +
> +#ifdef CONFIG_OF
> +static const struct of_device_id ub953_dt_ids[] = {
> + { .compatible = "ti,ds90ub953-q1", .data = &ds90ub953_hw },
> + { .compatible = "ti,ds90ub971-q1", .data = &ds90ub971_hw },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, ub953_dt_ids);
> +#endif
> +
> +static struct i2c_driver ds90ub953_driver = {
> + .probe_new = ub953_probe,
> + .remove = ub953_remove,
> + .id_table = ub953_id,
> + .driver = {
> + .name = "ds90ub953",
> + .owner = THIS_MODULE,
> + .of_match_table = of_match_ptr(ub953_dt_ids),
> + },
> +};
> +
> +module_i2c_driver(ds90ub953_driver);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("Texas Instruments DS90UB953 serializer driver");
> +MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
> +MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
> +MODULE_IMPORT_NS(I2C_ATR);
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 33+ messages in thread* Re: [PATCH v6 8/8] media: i2c: add DS90UB953 driver
2023-01-08 4:23 ` Laurent Pinchart
@ 2023-01-09 14:19 ` Tomi Valkeinen
0 siblings, 0 replies; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-09 14:19 UTC (permalink / raw)
To: Laurent Pinchart
Cc: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen, Mauro Carvalho Chehab,
Peter Rosin, Liam Girdwood, Mark Brown, Sakari Ailus,
Michael Tretter, Shawn Tu, Hans Verkuil, Mike Pagano,
Krzysztof Hałasa, Marek Vasut
On 08/01/2023 06:23, Laurent Pinchart wrote:
> Hi Tomi,
>
> Thank you for the patch.
>
> I won't repeat here the comments made on 7/8 that also apply to this
> patch.
Yep. I think I have addressed all of them for UB953 too. I also need to
check UB960, I believe many comments can be applied to that driver too.
> On Thu, Jan 05, 2023 at 04:03:07PM +0200, Tomi Valkeinen wrote:
>> Add driver for TI DS90UB953 FPD-Link III Serializer.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
>> ---
>> drivers/media/i2c/Kconfig | 13 +
>> drivers/media/i2c/Makefile | 1 +
>> drivers/media/i2c/ds90ub953.c | 1590 +++++++++++++++++++++++++++++++++
>> 3 files changed, 1604 insertions(+)
>> create mode 100644 drivers/media/i2c/ds90ub953.c
>>
>> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
>> index eb312d6e9cf6..29594c724307 100644
>> --- a/drivers/media/i2c/Kconfig
>> +++ b/drivers/media/i2c/Kconfig
>> @@ -1614,6 +1614,19 @@ config VIDEO_DS90UB913
>> Device driver for the Texas Instruments DS90UB913
>> FPD-Link III Serializer.
>>
>> +config VIDEO_DS90UB953
>> + tristate "TI DS90UB953 Serializer"
>
> I'd mention the DS90UB971 too.
I thought about it, but... How many model numbers will we add to this
string? Unfortunately I don't have any kind of "family" name for these
chips. I could perhaps call them "TI FPD-Link CSI-2 Serializers", but we
could as well get another CSI-2 serializer which doesn't quite fit into
the same driver.
But perhaps that's a problem for the future. Are you fine with "TI
FPD-Link III/IV CSI-2 Serializers"? I could name the UB960 and UB913
drivers similarly. I'll perhaps still keep CONFIG_VIDEO_DS90UB953, though.
>> + depends on OF && I2C && VIDEO_DEV
>> + select MEDIA_CONTROLLER
>> + select VIDEO_V4L2_SUBDEV_API
>> + select V4L2_FWNODE
>> + select REGMAP_I2C
>> + select OF_GPIO
>> + select I2C_ATR
>> + help
>> + Device driver for the Texas Instruments DS90UB953
>> + FPD-Link III Serializer and DS90UB971 FPD-Link IV Serializer.
>> +
>> config VIDEO_DS90UB960
>> tristate "TI DS90UB960 Deserializer"
>> depends on OF && I2C && VIDEO_DEV
>> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
>> index c4875ec8c3b9..efd5f717a5f7 100644
>> --- a/drivers/media/i2c/Makefile
>> +++ b/drivers/media/i2c/Makefile
>> @@ -143,4 +143,5 @@ obj-$(CONFIG_VIDEO_VS6624) += vs6624.o
>> obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
>> obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
>> obj-$(CONFIG_VIDEO_DS90UB913) += ds90ub913.o
>> +obj-$(CONFIG_VIDEO_DS90UB953) += ds90ub953.o
>> obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
>> diff --git a/drivers/media/i2c/ds90ub953.c b/drivers/media/i2c/ds90ub953.c
>> new file mode 100644
>> index 000000000000..251dc8e8adfa
>> --- /dev/null
>> +++ b/drivers/media/i2c/ds90ub953.c
>> @@ -0,0 +1,1590 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Driver for the Texas Instruments DS90UB953 video serializer
>> + *
>> + * Based on a driver from Luca Ceresoli <luca@lucaceresoli.net>
>> + *
>> + * Copyright (c) 2019 Luca Ceresoli <luca@lucaceresoli.net>
>> + * Copyright (c) 2022 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
>> + */
>> +
>> +#include <linux/clk-provider.h>
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/gpio/driver.h>
>> +#include <linux/i2c-atr.h>
>> +#include <linux/i2c.h>
>> +#include <linux/kernel.h>
>> +#include <linux/math64.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_device.h>
>> +#include <linux/of_graph.h>
>> +#include <linux/rational.h>
>> +#include <linux/regmap.h>
>> +
>> +#include <media/i2c/ds90ub9xx.h>
>> +#include <media/v4l2-ctrls.h>
>> +#include <media/v4l2-event.h>
>> +#include <media/v4l2-subdev.h>
>> +
>> +#define UB953_PAD_SINK 0
>> +#define UB953_PAD_SOURCE 1
>> +
>> +#define UB953_NUM_GPIOS 4
>> +
>> +#define UB953_REG_RESET_CTL 0x01
>> +#define UB953_REG_RESET_CTL_DIGITAL_RESET_1 BIT(1)
>> +#define UB953_REG_RESET_CTL_DIGITAL_RESET_0 BIT(0)
>> +
>> +#define UB953_REG_GENERAL_CFG 0x02
>> +#define UB953_REG_GENERAL_CFG_CONT_CLK BIT(6)
>> +#define UB953_REG_GENERAL_CFG_CSI_LANE_SEL_SHIFT 4
>> +#define UB953_REG_GENERAL_CFG_CSI_LANE_SEL_MASK GENMASK(5, 4)
>> +#define UB953_REG_GENERAL_CFG_CRC_TX_GEN_ENABLE BIT(1)
>> +#define UB953_REG_GENERAL_CFG_I2C_STRAP_MODE BIT(0)
>> +
>> +#define UB953_REG_MODE_SEL 0x03
>> +#define UB953_REG_MODE_SEL_MODE_DONE BIT(3)
>> +#define UB953_REG_MODE_SEL_MODE_OVERRIDE BIT(4)
>> +#define UB953_REG_MODE_SEL_MODE_MASK GENMASK(2, 0)
>> +
>> +#define UB953_REG_CLKOUT_CTRL0 0x06
>> +#define UB953_REG_CLKOUT_CTRL1 0x07
>> +
>> +#define UB953_REG_SCL_HIGH_TIME 0x0B
>> +#define UB953_REG_SCL_LOW_TIME 0x0C
>> +
>> +#define UB953_REG_LOCAL_GPIO_DATA 0x0d
>> +#define UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(n) BIT(4 + (n))
>> +#define UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(n) BIT(0 + (n))
>> +
>> +#define UB953_REG_GPIO_INPUT_CTRL 0x0e
>> +#define UB953_REG_GPIO_INPUT_CTRL_OUT_EN(n) BIT(4 + (n))
>> +#define UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(n) BIT(0 + (n))
>> +
>> +#define UB953_REG_REV_MASK_ID 0x50
>> +#define UB953_REG_GENERAL_STATUS 0x52
>> +
>> +#define UB953_REG_GPIO_PIN_STS 0x53
>> +#define UB953_REG_GPIO_PIN_STS_GPIO_STS(n) BIT(0 + (n))
>> +
>> +#define UB953_REG_BIST_ERR_CNT 0x54
>> +#define UB953_REG_CRC_ERR_CNT1 0x55
>> +#define UB953_REG_CRC_ERR_CNT2 0x56
>> +
>> +#define UB953_REG_CSI_ERR_CNT 0x5c
>> +#define UB953_REG_CSI_ERR_STATUS 0x5D
>> +#define UB953_REG_CSI_ERR_DLANE01 0x5E
>> +#define UB953_REG_CSI_ERR_DLANE23 0x5F
>> +#define UB953_REG_CSI_ERR_CLK_LANE 0x60
>> +#define UB953_REG_CSI_PKT_HDR_VC_ID 0x61
>> +#define UB953_REG_PKT_HDR_WC_LSB 0x62
>> +#define UB953_REG_PKT_HDR_WC_MSB 0x63
>> +#define UB953_REG_CSI_ECC 0x64
>> +
>> +#define UB953_REG_IND_ACC_CTL 0xb0
>> +#define UB953_REG_IND_ACC_ADDR 0xb1
>> +#define UB953_REG_IND_ACC_DATA 0xb2
>> +
>> +#define UB953_REG_FPD3_RX_ID(n) (0xf0 + (n))
>> +
>> +/* Indirect register blocks */
>> +#define UB953_IND_TARGET_PAT_GEN 0x00
>> +#define UB953_IND_TARGET_FPD3_TX 0x01
>> +#define UB953_IND_TARGET_DIE_ID 0x02
>> +
>> +#define UB953_IND_PGEN_CTL 0x01
>> +#define UB953_IND_PGEN_CTL_PGEN_ENABLE BIT(0)
>> +#define UB953_IND_PGEN_CFG 0x02
>> +#define UB953_IND_PGEN_CSI_DI 0x03
>> +#define UB953_IND_PGEN_LINE_SIZE1 0x04
>> +#define UB953_IND_PGEN_LINE_SIZE0 0x05
>> +#define UB953_IND_PGEN_BAR_SIZE1 0x06
>> +#define UB953_IND_PGEN_BAR_SIZE0 0x07
>> +#define UB953_IND_PGEN_ACT_LPF1 0x08
>> +#define UB953_IND_PGEN_ACT_LPF0 0x09
>> +#define UB953_IND_PGEN_TOT_LPF1 0x0A
>> +#define UB953_IND_PGEN_TOT_LPF0 0x0B
>> +#define UB953_IND_PGEN_LINE_PD1 0x0C
>> +#define UB953_IND_PGEN_LINE_PD0 0x0D
>> +#define UB953_IND_PGEN_VBP 0x0E
>> +#define UB953_IND_PGEN_VFP 0x0F
>> +#define UB953_IND_PGEN_COLOR(n) (0x10 + (n)) /* n <= 15 */
>> +
>> +/* Note: Only sync mode supported for now */
>> +enum ub953_mode {
>> + /* FPD-Link III CSI-2 synchronous mode */
>> + UB953_MODE_SYNC,
>> + /* FPD-Link III CSI-2 non-synchronous mode, external ref clock */
>> + UB953_MODE_NONSYNC_EXT,
>> + /* FPD-Link III CSI-2 non-synchronous mode, internal ref clock */
>> + UB953_MODE_NONSYNC_INT,
>> + /* FPD-Link III DVP mode */
>> + UB953_MODE_DVP,
>> +};
>> +
>> +struct ub953_hw_data {
>> + const char *model;
>> + bool ub971;
>
> Maybe is_ub971, although a model enum could be nicer. Up to you.
Yes I went the lazy way for now. I wasn't sure how the new models would
be implemented. We probably don't so much need a model enum, but rater a
feature list, and I wasn't sure what the features are so I just added a
simple bool for now.
>> +};
>> +
>> +struct ub953_data {
>> + const struct ub953_hw_data *hw_data;
>> +
>> + struct i2c_client *client;
>> + struct regmap *regmap;
>> +
>> + u32 num_data_lanes;
>> +
>> + struct gpio_chip gpio_chip;
>> + char gpio_chip_name[64];
>> +
>> + struct v4l2_subdev sd;
>> + struct media_pad pads[2];
>> +
>> + struct v4l2_async_notifier notifier;
>> +
>> + struct v4l2_subdev *source_sd;
>> +
>> + struct v4l2_ctrl_handler ctrl_handler;
>> +
>> + u64 enabled_source_streams;
>> +
>> + struct device_node *tx_ep_np;
>> +
>> + /* lock for register access */
>> + struct mutex reg_lock;
>
> Why is this needed, can you access registers from multiple contexts ?
Yes, we have gpio_chip, log_status, etc. The reg_lock is for the
indirect registers, as we need to manage the paging with the help from
priv->current_indirect_target.
So even if the two contexts would be dealing with their own registers,
and thus no lock needed, the paging makes us need a lock.
>> +
>> + u8 current_indirect_target;
>> +
>> + struct clk_hw clkout_clk_hw;
>> +
>> + enum ub953_mode mode;
>> +
>> + struct ds90ub9xx_platform_data *plat_data;
>> +};
>> +
>> +static inline struct ub953_data *sd_to_ub953(struct v4l2_subdev *sd)
>> +{
>> + return container_of(sd, struct ub953_data, sd);
>> +}
>> +
>> +/*
>> + * HW Access
>> + */
>> +
>> +static int ub953_read(struct ub953_data *priv, u8 reg, u8 *val)
>> +{
>> + unsigned int v;
>> + int ret;
>> +
>> + mutex_lock(&priv->reg_lock);
>> +
>> + ret = regmap_read(priv->regmap, reg, &v);
>> + if (ret)
>> + dev_err(&priv->client->dev,
>> + "Cannot read register 0x%02x: %d!\n", reg, ret);
>> + else
>> + *val = v;
>> +
>> + mutex_unlock(&priv->reg_lock);
>> +
>> + return ret;
>> +}
>> +
>> +static int ub953_write(struct ub953_data *priv, u8 reg, u8 val)
>> +{
>> + int ret;
>> +
>> + mutex_lock(&priv->reg_lock);
>> +
>> + ret = regmap_write(priv->regmap, reg, val);
>> + if (ret)
>> + dev_err(&priv->client->dev,
>> + "Cannot write register 0x%02x: %d!\n", reg, ret);
>> +
>> + mutex_unlock(&priv->reg_lock);
>> +
>> + return ret;
>> +}
>> +
>> +static int _ub953_select_ind_reg_block(struct ub953_data *priv, u8 block)
>> +{
>> + struct device *dev = &priv->client->dev;
>> + int ret;
>> +
>> + if (priv->current_indirect_target == block)
>> + return 0;
>> +
>> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_CTL, block << 2);
>> + if (ret) {
>> + dev_err(dev, "%s: cannot select indirect target %u (%d)!\n",
>> + __func__, block, ret);
>> + return ret;
>> + }
>> +
>> + priv->current_indirect_target = block;
>> +
>> + return 0;
>> +}
>> +
>> +__maybe_unused
>
> Looks like it's more than maybe unused, it's never used at all. Can the
> function be dropped ?
I'd rather keep it. I've dropped it once, then had to add it back when
debugging or implementing some new feature, but then ilater t become
unused again.
>> +static int ub953_read_ind(struct ub953_data *priv, u8 block, u8 reg, u8 *val)
>> +{
>> + unsigned int v;
>> + int ret;
>> +
>> + mutex_lock(&priv->reg_lock);
>> +
>> + ret = _ub953_select_ind_reg_block(priv, block);
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg);
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_read(priv->regmap, UB953_REG_IND_ACC_DATA, &v);
>> + if (ret)
>> + goto out;
>> +
>> + *val = v;
>> +
>> +out:
>> + mutex_unlock(&priv->reg_lock);
>> +
>> + return ret;
>> +}
>> +
>> +static int ub953_write_ind(struct ub953_data *priv, u8 block, u8 reg, u8 val)
>> +{
>> + int ret;
>> +
>> + mutex_lock(&priv->reg_lock);
>> +
>> + ret = _ub953_select_ind_reg_block(priv, block);
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg);
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_DATA, val);
>> +
>> +out:
>> + mutex_unlock(&priv->reg_lock);
>> +
>
> An error message would be useful on failure. Same in the next function.
Right, these don't use the ub953_read and ub953_write anymore. I'll add it.
>> + return ret;
>> +}
>> +
>> +static int ub953_write_ind16(struct ub953_data *priv, u8 block, u8 reg, u16 val)
>> +{
>> + int ret;
>> +
>> + mutex_lock(&priv->reg_lock);
>> +
>> + ret = _ub953_select_ind_reg_block(priv, block);
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg);
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_DATA, val >> 8);
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_ADDR, reg + 1);
>
> There's no auto-increment ? :-(
>
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_write(priv->regmap, UB953_REG_IND_ACC_DATA, val & 0xff);
>> + if (ret)
>> + goto out;
>> +
>> +out:
>> + mutex_unlock(&priv->reg_lock);
>> +
>> + return ret;
>> +}
>> +
>> +/*
>> + * GPIO chip
>> + */
>> +static int ub953_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
>> +{
>> + struct ub953_data *priv = gpiochip_get_data(gc);
>> + int ret;
>> + u8 v;
>> +
>> + ret = ub953_read(priv, UB953_REG_GPIO_INPUT_CTRL, &v);
>> + if (ret)
>> + return ret;
>> +
>> + if (v & UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset))
>> + return GPIO_LINE_DIRECTION_IN;
>> + else
>> + return GPIO_LINE_DIRECTION_OUT;
>> +}
>> +
>> +static int ub953_gpio_direction_in(struct gpio_chip *gc, unsigned int offset)
>> +{
>> + struct ub953_data *priv = gpiochip_get_data(gc);
>> +
>> + return regmap_update_bits(
>> + priv->regmap, UB953_REG_GPIO_INPUT_CTRL,
>> + UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset) |
>> + UB953_REG_GPIO_INPUT_CTRL_OUT_EN(offset),
>> + UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset));
>> +}
>> +
>> +static int ub953_gpio_direction_out(struct gpio_chip *gc, unsigned int offset,
>> + int value)
>> +{
>> + struct ub953_data *priv = gpiochip_get_data(gc);
>> + int ret;
>> +
>> + ret = regmap_update_bits(
>> + priv->regmap, UB953_REG_LOCAL_GPIO_DATA,
>> + UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset),
>> + value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) : 0);
>> +
>> + if (ret)
>> + return ret;
>> +
>> + return regmap_update_bits(
>> + priv->regmap, UB953_REG_GPIO_INPUT_CTRL,
>> + UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(offset) |
>> + UB953_REG_GPIO_INPUT_CTRL_OUT_EN(offset),
>> + UB953_REG_GPIO_INPUT_CTRL_OUT_EN(offset));
>> +}
>> +
>> +static int ub953_gpio_get(struct gpio_chip *gc, unsigned int offset)
>> +{
>> + struct ub953_data *priv = gpiochip_get_data(gc);
>> + int ret;
>> + u8 v;
>> +
>> + ret = ub953_read(priv, UB953_REG_GPIO_PIN_STS, &v);
>> + if (ret)
>> + return ret;
>> +
>> + return !!(v & UB953_REG_GPIO_PIN_STS_GPIO_STS(offset));
>> +}
>> +
>> +static void ub953_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
>> +{
>> + struct ub953_data *priv = gpiochip_get_data(gc);
>> +
>> + regmap_update_bits(
>> + priv->regmap, UB953_REG_LOCAL_GPIO_DATA,
>> + UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset),
>> + value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) : 0);
>> +}
>> +
>> +static int ub953_gpio_of_xlate(struct gpio_chip *gc,
>> + const struct of_phandle_args *gpiospec,
>> + u32 *flags)
>> +{
>> + if (flags)
>> + *flags = gpiospec->args[1];
>> +
>> + return gpiospec->args[0];
>> +}
>> +
>> +static int ub953_gpiochip_probe(struct ub953_data *priv)
>> +{
>> + struct device *dev = &priv->client->dev;
>> + struct gpio_chip *gc = &priv->gpio_chip;
>> + int ret;
>> +
>> + /* Set all GPIOs to local input mode */
>> + ub953_write(priv, UB953_REG_LOCAL_GPIO_DATA, 0);
>> + ub953_write(priv, UB953_REG_GPIO_INPUT_CTRL, 0xf);
>> +
>> + scnprintf(priv->gpio_chip_name, sizeof(priv->gpio_chip_name), "%s",
>> + dev_name(dev));
>> +
>> + gc->label = priv->gpio_chip_name;
>> + gc->parent = dev;
>> + gc->owner = THIS_MODULE;
>> + gc->base = -1;
>> + gc->can_sleep = 1;
>> + gc->ngpio = UB953_NUM_GPIOS;
>> + gc->get_direction = ub953_gpio_get_direction;
>> + gc->direction_input = ub953_gpio_direction_in;
>> + gc->direction_output = ub953_gpio_direction_out;
>> + gc->get = ub953_gpio_get;
>> + gc->set = ub953_gpio_set;
>> + gc->of_xlate = ub953_gpio_of_xlate;
>> + gc->of_node = priv->client->dev.of_node;
>> + gc->of_gpio_n_cells = 2;
>> +
>> + ret = gpiochip_add_data(gc, priv);
>> + if (ret) {
>> + dev_err(dev, "Failed to add GPIOs: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static void ub953_gpiochip_remove(struct ub953_data *priv)
>> +{
>> + gpiochip_remove(&priv->gpio_chip);
>> +}
>> +
>> +/*
>> + * V4L2
>> + */
>> +
>> +static int _ub953_set_routing(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state,
>> + struct v4l2_subdev_krouting *routing)
>> +{
>> + static const struct v4l2_mbus_framefmt format = {
>> + .width = 640,
>> + .height = 480,
>> + .code = MEDIA_BUS_FMT_UYVY8_1X16,
>> + .field = V4L2_FIELD_NONE,
>> + .colorspace = V4L2_COLORSPACE_SRGB,
>> + .ycbcr_enc = V4L2_YCBCR_ENC_601,
>> + .quantization = V4L2_QUANTIZATION_LIM_RANGE,
>> + .xfer_func = V4L2_XFER_FUNC_SRGB,
>> + };
>> + int ret;
>> +
>> + /*
>> + * Note: we can only support up to V4L2_FRAME_DESC_ENTRY_MAX, until
>> + * frame desc is made dynamically allocated.
>> + */
>> +
>> + if (routing->num_routes > V4L2_FRAME_DESC_ENTRY_MAX)
>> + return -EINVAL;
>> +
>> + ret = v4l2_subdev_routing_validate(sd, routing,
>> + V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
>> + if (ret)
>> + return ret;
>> +
>> + ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub953_set_routing(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state,
>> + enum v4l2_subdev_format_whence which,
>> + struct v4l2_subdev_krouting *routing)
>> +{
>> + struct ub953_data *priv = sd_to_ub953(sd);
>> +
>> + if (which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->enabled_source_streams)
>> + return -EBUSY;
>> +
>> + return _ub953_set_routing(sd, state, routing);
>> +}
>> +
>> +static int ub953_get_source_frame_desc(struct ub953_data *priv,
>> + struct v4l2_mbus_frame_desc *desc)
>> +{
>> + struct media_pad *pad;
>> + int ret;
>> +
>> + pad = media_pad_remote_pad_first(&priv->pads[UB953_PAD_SINK]);
>> + if (!pad)
>> + return -EPIPE;
>> +
>> + ret = v4l2_subdev_call(priv->source_sd, pad, get_frame_desc, pad->index,
>> + desc);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub953_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
>> + struct v4l2_mbus_frame_desc *fd)
>> +{
>> + struct ub953_data *priv = sd_to_ub953(sd);
>> + const struct v4l2_subdev_krouting *routing;
>> + struct v4l2_mbus_frame_desc source_fd;
>> + struct v4l2_subdev_route *route;
>> + struct v4l2_subdev_state *state;
>> + int ret;
>> +
>> + if (pad != UB953_PAD_SOURCE)
>> + return -EINVAL;
>> +
>> + ret = ub953_get_source_frame_desc(priv, &source_fd);
>> + if (ret)
>> + return ret;
>> +
>> + state = v4l2_subdev_lock_and_get_active_state(sd);
>> +
>> + routing = &state->routing;
>> +
>> + memset(fd, 0, sizeof(*fd));
>> +
>> + fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
>> +
>> + for_each_active_route(routing, route) {
>> + struct v4l2_mbus_frame_desc_entry *source_entry = NULL;
>> + unsigned int i;
>> +
>> + if (route->source_pad != pad)
>> + continue;
>> +
>> + for (i = 0; i < source_fd.num_entries; ++i)
>> + if (source_fd.entry[i].stream == route->sink_stream) {
>> + source_entry = &source_fd.entry[i];
>> + break;
>> + }
>> +
>> + if (!source_entry) {
>> + dev_err(&priv->client->dev,
>> + "Failed to find stream from source frame desc\n");
>> + ret = -EPIPE;
>> + goto out;
>> + }
>> +
>> + fd->entry[fd->num_entries].stream = route->source_stream;
>> + fd->entry[fd->num_entries].flags = source_entry->flags;
>> + fd->entry[fd->num_entries].length = source_entry->length;
>> + fd->entry[fd->num_entries].pixelcode = source_entry->pixelcode;
>> + fd->entry[fd->num_entries].bus.csi2.vc =
>> + source_entry->bus.csi2.vc;
>> + fd->entry[fd->num_entries].bus.csi2.dt =
>> + source_entry->bus.csi2.dt;
>> +
>> + fd->num_entries++;
>> + }
>> +
>> +out:
>> + v4l2_subdev_unlock_state(state);
>> +
>> + return ret;
>> +}
>> +
>> +static int ub953_set_fmt(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state,
>> + struct v4l2_subdev_format *format)
>> +{
>> + struct ub953_data *priv = sd_to_ub953(sd);
>> + struct v4l2_mbus_framefmt *fmt;
>> +
>> + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE &&
>> + priv->enabled_source_streams)
>> + return -EBUSY;
>> +
>> + /* No transcoding, source and sink formats must match. */
>> + if (format->pad == UB953_PAD_SOURCE)
>> + return v4l2_subdev_get_fmt(sd, state, format);
>> +
>> + /* Set sink format */
>> + fmt = v4l2_subdev_state_get_stream_format(state, format->pad,
>> + format->stream);
>> + if (!fmt)
>> + return -EINVAL;
>> +
>> + *fmt = format->format;
>> +
>> + /* Propagate to source format */
>> + fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
>> + format->stream);
>> + if (!fmt)
>> + return -EINVAL;
>> +
>> + *fmt = format->format;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub953_init_cfg(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state)
>> +{
>> + struct v4l2_subdev_route routes[] = {
>> + {
>> + .sink_pad = UB953_PAD_SINK,
>> + .sink_stream = 0,
>> + .source_pad = UB953_PAD_SOURCE,
>> + .source_stream = 0,
>> + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
>> + },
>> + };
>> +
>> + struct v4l2_subdev_krouting routing = {
>> + .num_routes = ARRAY_SIZE(routes),
>> + .routes = routes,
>> + };
>> +
>> + return _ub953_set_routing(sd, state, &routing);
>> +}
>> +
>> +static int ub953_log_status(struct v4l2_subdev *sd)
>> +{
>> + struct ub953_data *priv = sd_to_ub953(sd);
>> + struct device *dev = &priv->client->dev;
>> + u8 v = 0, v1 = 0, v2 = 0;
>> + unsigned int i;
>> + char id[7];
>> + u8 gpio_local_data;
>> + u8 gpio_input_ctrl;
>> + u8 gpio_pin_sts;
>> +
>> + for (i = 0; i < 6; ++i)
>> + ub953_read(priv, UB953_REG_FPD3_RX_ID(i), &id[i]);
>> + id[6] = 0;
>> +
>> + dev_info(dev, "ID '%s'\n", id);
>> +
>> + ub953_read(priv, UB953_REG_GENERAL_STATUS, &v);
>> + dev_info(dev, "GENERAL_STATUS %#x\n", v);
>> +
>> + ub953_read(priv, UB953_REG_CRC_ERR_CNT1, &v1);
>> + ub953_read(priv, UB953_REG_CRC_ERR_CNT2, &v2);
>> + dev_info(dev, "CRC error count %u\n", v1 | (v2 << 8));
>> +
>> + ub953_read(priv, UB953_REG_CSI_ERR_CNT, &v);
>> + dev_info(dev, "CSI error count %u\n", v);
>> +
>> + ub953_read(priv, UB953_REG_CSI_ERR_STATUS, &v);
>> + dev_info(dev, "CSI_ERR_STATUS %#x\n", v);
>> +
>> + ub953_read(priv, UB953_REG_CSI_ERR_DLANE01, &v);
>> + dev_info(dev, "CSI_ERR_DLANE01 %#x\n", v);
>> +
>> + ub953_read(priv, UB953_REG_CSI_ERR_DLANE23, &v);
>> + dev_info(dev, "CSI_ERR_DLANE23 %#x\n", v);
>> +
>> + ub953_read(priv, UB953_REG_CSI_ERR_CLK_LANE, &v);
>> + dev_info(dev, "CSI_ERR_CLK_LANE %#x\n", v);
>> +
>> + ub953_read(priv, UB953_REG_CSI_PKT_HDR_VC_ID, &v);
>> + dev_info(dev, "CSI packet header VC %u ID %u\n", v >> 6, v & 0x3f);
>> +
>> + ub953_read(priv, UB953_REG_PKT_HDR_WC_LSB, &v1);
>> + ub953_read(priv, UB953_REG_PKT_HDR_WC_MSB, &v2);
>> + dev_info(dev, "CSI packet header WC %u\n", (v2 << 8) | v1);
>> +
>> + ub953_read(priv, UB953_REG_CSI_ECC, &v);
>> + dev_info(dev, "CSI ECC %#x\n", v);
>> +
>> + ub953_read(priv, UB953_REG_LOCAL_GPIO_DATA, &gpio_local_data);
>> + ub953_read(priv, UB953_REG_GPIO_INPUT_CTRL, &gpio_input_ctrl);
>> + ub953_read(priv, UB953_REG_GPIO_PIN_STS, &gpio_pin_sts);
>> +
>> + for (i = 0; i < UB953_NUM_GPIOS; ++i) {
>> + dev_info(dev,
>> + "GPIO%u: remote: %u is_input: %u is_output: %u val: %u sts: %u\n",
>> + i,
>> + !!(gpio_local_data & UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(i)),
>> + !!(gpio_input_ctrl & UB953_REG_GPIO_INPUT_CTRL_INPUT_EN(i)),
>> + !!(gpio_input_ctrl & UB953_REG_GPIO_INPUT_CTRL_OUT_EN(i)),
>> + !!(gpio_local_data & UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(i)),
>> + !!(gpio_pin_sts & UB953_REG_GPIO_PIN_STS_GPIO_STS(i)));
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int ub953_enable_streams(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state, u32 pad,
>> + u64 streams_mask)
>> +{
>> + struct ub953_data *priv = sd_to_ub953(sd);
>> + struct media_pad *remote_pad;
>> + u64 sink_streams;
>> + int ret;
>> +
>> + if (streams_mask & priv->enabled_source_streams)
>> + return -EALREADY;
>> +
>> + sink_streams = v4l2_subdev_state_xlate_streams(
>> + state, UB953_PAD_SOURCE, UB953_PAD_SINK, &streams_mask);
>> +
>> + remote_pad = media_pad_remote_pad_first(&priv->pads[UB953_PAD_SINK]);
>> +
>> + ret = v4l2_subdev_enable_streams(priv->source_sd, remote_pad->index,
>> + sink_streams);
>> + if (ret)
>> + return ret;
>> +
>> + priv->enabled_source_streams |= streams_mask;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub953_disable_streams(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *state, u32 pad,
>> + u64 streams_mask)
>> +{
>> + struct ub953_data *priv = sd_to_ub953(sd);
>> + struct media_pad *remote_pad;
>> + int ret;
>> + u64 sink_streams;
>> +
>> + if ((streams_mask & priv->enabled_source_streams) != streams_mask)
>> + return -EALREADY;
>> +
>> + sink_streams = v4l2_subdev_state_xlate_streams(
>> + state, UB953_PAD_SOURCE, UB953_PAD_SINK, &streams_mask);
>> +
>> + remote_pad = media_pad_remote_pad_first(&priv->pads[UB953_PAD_SINK]);
>> +
>> + ret = v4l2_subdev_disable_streams(priv->source_sd, remote_pad->index,
>> + sink_streams);
>> + if (ret)
>> + return ret;
>> +
>> + priv->enabled_source_streams &= ~streams_mask;
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_subdev_pad_ops ub953_pad_ops = {
>> + .enable_streams = ub953_enable_streams,
>> + .disable_streams = ub953_disable_streams,
>> + .set_routing = ub953_set_routing,
>> + .get_frame_desc = ub953_get_frame_desc,
>> + .get_fmt = v4l2_subdev_get_fmt,
>> + .set_fmt = ub953_set_fmt,
>> + .init_cfg = ub953_init_cfg,
>> +};
>> +
>> +static const struct v4l2_subdev_core_ops ub953_subdev_core_ops = {
>> + .log_status = ub953_log_status,
>> + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
>> + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
>
> Align the = for all structures or for none.
Ok.
>> +};
>> +
>> +static const struct v4l2_subdev_ops ub953_subdev_ops = {
>> + .core = &ub953_subdev_core_ops,
>> + .pad = &ub953_pad_ops,
>> +};
>> +
>> +static const struct media_entity_operations ub953_entity_ops = {
>> + .link_validate = v4l2_subdev_link_validate,
>> +};
>> +
>> +enum {
>> + TEST_PATTERN_DISABLED = 0,
>> + TEST_PATTERN_V_COLOR_BARS_1,
>> + TEST_PATTERN_V_COLOR_BARS_2,
>> + TEST_PATTERN_V_COLOR_BARS_4,
>> + TEST_PATTERN_V_COLOR_BARS_8,
>> +};
>> +
>> +static const char *const ub953_tpg_qmenu[] = {
>> + "Disabled",
>> + "1 vertical color bar",
>> + "2 vertical color bars",
>> + "4 vertical color bars",
>> + "8 vertical color bars",
>> +};
>> +
>> +static int ub953_enable_tpg(struct ub953_data *priv, int tpg_num)
>> +{
>> + struct v4l2_subdev *sd = &priv->sd;
>> + struct v4l2_subdev_state *state;
>> + struct v4l2_mbus_framefmt *fmt;
>> + u8 vbp, vfp;
>> + u16 blank_lines;
>> + u16 width;
>> + u16 height;
>> +
>> + u16 bytespp = 2; /* For MEDIA_BUS_FMT_UYVY8_1X16 */
>> + u8 cbars_idx = tpg_num - TEST_PATTERN_V_COLOR_BARS_1;
>> + u8 num_cbars = 1 << cbars_idx;
>> +
>> + u16 line_size; /* Line size [bytes] */
>> + u16 bar_size; /* cbar size [bytes] */
>> + u16 act_lpf; /* active lines/frame */
>> + u16 tot_lpf; /* tot lines/frame */
>> + u16 line_pd; /* Line period in 10-ns units */
>> +
>> + u16 fps = 30;
>> +
>> + vbp = 33;
>> + vfp = 10;
>> + blank_lines = vbp + vfp + 2; /* total blanking lines */
>> +
>> + state = v4l2_subdev_get_locked_active_state(sd);
>> +
>> + if (state->routing.num_routes != 1)
>> + return -EINVAL;
>> +
>> + fmt = v4l2_subdev_state_get_stream_format(state, UB953_PAD_SOURCE, 0);
>> + if (!fmt)
>> + return -EINVAL;
>> +
>> + if (fmt->code != MEDIA_BUS_FMT_UYVY8_1X16)
>> + return -EINVAL;
>> +
>> + width = fmt->width;
>> + height = fmt->height;
>> +
>> + line_size = width * bytespp;
>> + bar_size = line_size / num_cbars;
>> + act_lpf = height;
>> + tot_lpf = act_lpf + blank_lines;
>> + line_pd = 100000000 / fps / tot_lpf;
>> +
>> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CTL,
>> + UB953_IND_PGEN_CTL_PGEN_ENABLE);
>> +
>> + /* YUV422 8bit: 2 bytes/block, CSI-2 data type 0x1e */
>> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CFG,
>> + cbars_idx << 4 | 0x2);
>> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CSI_DI,
>> + 0x1e);
>> +
>> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
>> + UB953_IND_PGEN_LINE_SIZE1, line_size);
>> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
>> + UB953_IND_PGEN_BAR_SIZE1, bar_size);
>> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
>> + UB953_IND_PGEN_ACT_LPF1, act_lpf);
>> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
>> + UB953_IND_PGEN_TOT_LPF1, tot_lpf);
>> + ub953_write_ind16(priv, UB953_IND_TARGET_PAT_GEN,
>> + UB953_IND_PGEN_LINE_PD1, line_pd);
>> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_VBP,
>> + vbp);
>> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_VFP,
>> + vfp);
>> +
>> + return 0;
>> +}
>> +
>> +static void ub953_disable_tpg(struct ub953_data *priv)
>> +{
>> + ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_CTL,
>> + 0x0);
>> +}
>> +
>> +static int ub953_s_ctrl(struct v4l2_ctrl *ctrl)
>> +{
>> + struct ub953_data *priv =
>> + container_of(ctrl->handler, struct ub953_data, ctrl_handler);
>> + int ret = 0;
>> +
>> + switch (ctrl->id) {
>> + case V4L2_CID_TEST_PATTERN:
>> + if (ctrl->val == 0)
>> + ub953_disable_tpg(priv);
>> + else
>> + ret = ub953_enable_tpg(priv, ctrl->val);
>> + break;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static const struct v4l2_ctrl_ops ub953_ctrl_ops = {
>> + .s_ctrl = ub953_s_ctrl,
>> +};
>> +
>> +static int ub953_notify_bound(struct v4l2_async_notifier *notifier,
>> + struct v4l2_subdev *source_subdev,
>> + struct v4l2_async_subdev *asd)
>> +{
>> + struct ub953_data *priv = sd_to_ub953(notifier->sd);
>> + struct device *dev = &priv->client->dev;
>> + unsigned int src_pad;
>> + int ret;
>> +
>> + ret = media_entity_get_fwnode_pad(&source_subdev->entity,
>> + source_subdev->fwnode,
>> + MEDIA_PAD_FL_SOURCE);
>> + if (ret < 0) {
>> + dev_err(dev, "Failed to find pad for %s\n",
>> + source_subdev->name);
>> + return ret;
>> + }
>> +
>> + priv->source_sd = source_subdev;
>> + src_pad = ret;
>> +
>> + ret = media_create_pad_link(
>> + &source_subdev->entity, src_pad, &priv->sd.entity, 0,
>> + MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
>> + if (ret) {
>> + dev_err(dev, "Unable to link %s:%u -> %s:0\n",
>> + source_subdev->name, src_pad, priv->sd.name);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_async_notifier_operations ub953_notify_ops = {
>> + .bound = ub953_notify_bound,
>> +};
>> +
>> +static int ub953_v4l2_notifier_register(struct ub953_data *priv)
>> +{
>> + struct device *dev = &priv->client->dev;
>> + struct v4l2_async_subdev *asd;
>> + struct device_node *ep_node;
>> + int ret;
>> +
>> + ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
>
> s/0, 0/UB953_PAD_SINK, 0/
>
> Similar comment for other calls to this function below.
Ok.
>> + if (!ep_node) {
>> + dev_err(dev, "No graph endpoint\n");
>> + return -ENODEV;
>> + }
>> +
>> + v4l2_async_nf_init(&priv->notifier);
>> +
>> + asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier,
>> + of_fwnode_handle(ep_node),
>> + struct v4l2_async_subdev);
>> +
>> + of_node_put(ep_node);
>> +
>> + if (IS_ERR(asd)) {
>> + dev_err(dev, "Failed to add subdev: %ld", PTR_ERR(asd));
>> + v4l2_async_nf_cleanup(&priv->notifier);
>> + return PTR_ERR(asd);
>> + }
>> +
>> + priv->notifier.ops = &ub953_notify_ops;
>> +
>> + ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier);
>> + if (ret) {
>> + dev_err(dev, "Failed to register subdev_notifier");
>> + v4l2_async_nf_cleanup(&priv->notifier);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static void ub953_v4l2_notifier_unregister(struct ub953_data *priv)
>> +{
>> + v4l2_async_nf_unregister(&priv->notifier);
>> + v4l2_async_nf_cleanup(&priv->notifier);
>> +}
>> +
>> +/*
>> + * Probing
>> + */
>> +
>> +static int ub953_i2c_master_init(struct ub953_data *priv)
>> +{
>> + /* i2c fast mode */
>> + u32 ref = 26250000;
>> + u32 scl_high = 915; /* ns */
>> + u32 scl_low = 1641; /* ns */
>> + int ret;
>> +
>> + scl_high = div64_u64((u64)scl_high * ref, 1000000000) - 5;
>> + scl_low = div64_u64((u64)scl_low * ref, 1000000000) - 5;
>> +
>> + ret = ub953_write(priv, UB953_REG_SCL_HIGH_TIME, scl_high);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ub953_write(priv, UB953_REG_SCL_LOW_TIME, scl_low);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>> +
>> +static u64 ub953_get_fc_rate(struct ub953_data *priv)
>> +{
>> + if (priv->hw_data->ub971) {
>> + switch (priv->mode) {
>> + case UB953_MODE_SYNC:
>> + return priv->plat_data->bc_rate * 160ull;
>> + default:
>> + /* Not supported */
>> + return 0;
>> + }
>> + } else {
>> + switch (priv->mode) {
>> + case UB953_MODE_SYNC:
>> + return priv->plat_data->bc_rate / 2 * 160ull;
>> + default:
>> + /* Not supported */
>> + return 0;
>> + }
>> + }
>
> This could be simplified to
>
> if (priv->mode != UB953_MODE_SYNC)
> /* Not supported */
> return 0;
>
> if (priv->hw_data->ub971)
> return priv->plat_data->bc_rate * 160ull;
> else
> return priv->plat_data->bc_rate / 2 * 160ull;
Ok.
>> +}
>> +
>> +static unsigned long ub953_calc_clkout_ub953(struct ub953_data *priv,
>> + unsigned long target, u64 fc,
>> + u8 *hs_div, u8 *m, u8 *n)
>> +{
>> + /*
>> + * We always use 4 as a pre-divider (HS_CLK_DIV = 2).
>> + *
>> + * According to the datasheet:
>> + * - "HS_CLK_DIV typically should be set to either 16, 8, or 4 (default)."
>> + * - "if it is not possible to have an integer ratio of N/M, it is best to
>> + * select a smaller value for HS_CLK_DIV.
>> + *
>> + * For above reasons the default HS_CLK_DIV seems the best in the average
>> + * case. Use always that value to keep the code simple.
>> + */
>> + static const unsigned long hs_clk_div = 4;
>> +
>> + u64 fc_divided;
>> + unsigned long mul, div;
>> + unsigned long res;
>> +
>> + /* clkout = fc / hs_clk_div * m / n */
>> +
>> + fc_divided = div_u64(fc, hs_clk_div);
>> +
>> + rational_best_approximation(target, fc_divided, (1 << 5) - 1,
>> + (1 << 8) - 1, &mul, &div);
>> +
>> + res = div_u64(fc_divided * mul, div);
>> +
>> + *hs_div = hs_clk_div;
>> + *m = mul;
>> + *n = div;
>> +
>> + return res;
>> +}
>> +
>> +static unsigned long ub953_calc_clkout_ub971(struct ub953_data *priv,
>> + unsigned long target, u64 fc,
>> + u8 *m, u8 *n)
>> +{
>> + u64 fc_divided;
>> + unsigned long mul, div;
>> + unsigned long res;
>> +
>> + /* clkout = fc * m / (8 * n) */
>> +
>> + fc_divided = div_u64(fc, 8);
>> +
>> + rational_best_approximation(target, fc_divided, (1 << 5) - 1,
>> + (1 << 8) - 1, &mul, &div);
>> +
>> + res = div_u64(fc_divided * mul, div);
>> +
>> + *m = mul;
>> + *n = div;
>> +
>> + return res;
>> +}
>> +
>> +static unsigned long ub953_clkout_recalc_rate(struct clk_hw *hw,
>> + unsigned long parent_rate)
>> +{
>> + struct ub953_data *priv = container_of(hw, struct ub953_data, clkout_clk_hw);
>> + struct device *dev = &priv->client->dev;
>> + u8 ctrl0, ctrl1;
>> + u32 mul, div;
>> + u64 fc_rate;
>> + u32 hs_clk_div;
>> + u64 rate;
>> + int ret;
>> +
>> + ret = ub953_read(priv, UB953_REG_CLKOUT_CTRL0, &ctrl0);
>> + if (ret) {
>> + dev_err(dev, "Failed to read CLKOUT_CTRL0: %d\n", ret);
>> + return 0;
>> + }
>> +
>> + ret = ub953_read(priv, UB953_REG_CLKOUT_CTRL1, &ctrl1);
>> + if (ret) {
>> + dev_err(dev, "Failed to read CLKOUT_CTRL1: %d\n", ret);
>> + return 0;
>> + }
>> +
>> + fc_rate = ub953_get_fc_rate(priv);
>> +
>> + if (priv->hw_data->ub971) {
>> + mul = ctrl0 & 0x1f;
>> + div = ctrl1;
>> +
>> + if (div == 0)
>> + return 0;
>> +
>> + rate = div_u64(fc_rate * mul, 8 * div);
>> +
>> + dev_dbg(dev, "clkout: fc rate %llu, mul %u, div %u = %llu\n",
>> + fc_rate, mul, div, rate);
>> + } else {
>> + mul = ctrl0 & 0x1f;
>> + hs_clk_div = 1 << (ctrl0 >> 5);
>> + div = ctrl1;
>> +
>> + if (div == 0)
>> + return 0;
>> +
>> + rate = div_u64(div_u64(fc_rate, hs_clk_div) * mul, div);
>> +
>> + dev_dbg(dev,
>> + "clkout: fc rate %llu, hs_clk_div %u, mul %u, div %u = %llu\n",
>> + fc_rate, hs_clk_div, mul, div, rate);
>> + }
>> +
>> + return rate;
>> +}
>> +
>> +static long ub953_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
>> + unsigned long *parent_rate)
>> +{
>> + struct ub953_data *priv = container_of(hw, struct ub953_data, clkout_clk_hw);
>> + struct device *dev = &priv->client->dev;
>> + unsigned long res;
>> + u64 fc_rate;
>> + u8 hs_div, m, n;
>> +
>> + fc_rate = ub953_get_fc_rate(priv);
>> +
>> + if (priv->hw_data->ub971) {
>> + res = ub953_calc_clkout_ub971(priv, rate, fc_rate, &m, &n);
>> +
>> + dev_dbg(dev,
>> + "%s %llu * %u / (8 * %u) = %lu (requested %lu)",
>> + __func__, fc_rate, m, n, res, rate);
>> + } else {
>> + res = ub953_calc_clkout_ub953(priv, rate, fc_rate, &hs_div, &m, &n);
>> +
>> + dev_dbg(dev,
>> + "%s %llu / %u * %u / %u = %lu (requested %lu)",
>> + __func__, fc_rate, hs_div, m, n, res, rate);
>> + }
>> +
>> + return res;
>> +}
>> +
>> +static int ub953_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
>> + unsigned long parent_rate)
>> +{
>> + struct ub953_data *priv = container_of(hw, struct ub953_data, clkout_clk_hw);
>> + u64 fc_rate;
>> + u8 hs_div, m, n;
>> + unsigned long res;
>> +
>> + fc_rate = ub953_get_fc_rate(priv);
>> +
>> + if (priv->hw_data->ub971) {
>> + res = ub953_calc_clkout_ub971(priv, rate, fc_rate, &m, &n);
>> +
>> + ub953_write(priv, UB953_REG_CLKOUT_CTRL0, m);
>> + ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
>> + } else {
>> + res = ub953_calc_clkout_ub953(priv, rate, fc_rate, &hs_div, &m, &n);
>> +
>> + ub953_write(priv, UB953_REG_CLKOUT_CTRL0, (__ffs(hs_div) << 5) | m);
>> + ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
>> + }
>> +
>> + dev_dbg(&priv->client->dev,
>> + "%s %lu (requested %lu)\n", __func__, res, rate);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct clk_ops ub953_clkout_ops = {
>> + .recalc_rate = ub953_clkout_recalc_rate,
>> + .round_rate = ub953_clkout_round_rate,
>> + .set_rate = ub953_clkout_set_rate,
>> +};
>> +
>> +static void ub953_init_clkout_ub953(struct ub953_data *priv)
>> +{
>> + u64 fc_rate;
>> + u8 hs_div, m, n;
>> +
>> + fc_rate = ub953_get_fc_rate(priv);
>> +
>> + ub953_calc_clkout_ub953(priv, 25000000, fc_rate, &hs_div, &m, &n);
>> +
>> + ub953_write(priv, UB953_REG_CLKOUT_CTRL0, (__ffs(hs_div) << 5) | m);
>> + ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
>> +}
>> +
>> +static void ub953_init_clkout_ub971(struct ub953_data *priv)
>> +{
>> + u64 fc_rate;
>> + u8 m, n;
>> +
>> + fc_rate = ub953_get_fc_rate(priv);
>> +
>> + ub953_calc_clkout_ub971(priv, 25000000, fc_rate, &m, &n);
>> +
>> + ub953_write(priv, UB953_REG_CLKOUT_CTRL0, m);
>> + ub953_write(priv, UB953_REG_CLKOUT_CTRL1, n);
>> +}
>> +
>> +static int ub953_register_clkout(struct ub953_data *priv)
>> +{
>> + struct device *dev = &priv->client->dev;
>> + const struct clk_init_data init = {
>> + .name = kasprintf(GFP_KERNEL, "ds90%s.%s.clk_out",
>> + priv->hw_data->model, dev_name(dev)),
>> + .ops = &ub953_clkout_ops,
>> + };
>> + int ret;
>> +
>> + /* Initialize clkout to 25MHz by default */
>> + if (priv->hw_data->ub971)
>> + ub953_init_clkout_ub971(priv);
>> + else
>> + ub953_init_clkout_ub953(priv);
>> +
>> + priv->clkout_clk_hw.init = &init;
>> +
>> + ret = devm_clk_hw_register(dev, &priv->clkout_clk_hw);
>> + kfree(init.name);
>> + if (ret)
>> + return dev_err_probe(dev, ret, "Cannot register clock HW\n");
>> +
>> + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,
>> + &priv->clkout_clk_hw);
>> + if (ret)
>> + return dev_err_probe(dev, ret,
>> + "Cannot add OF clock provider\n");
>> +
>> + return 0;
>> +}
>> +
>> +static int ub953_add_i2c_adapter(struct ub953_data *priv)
>> +{
>> + struct device *dev = &priv->client->dev;
>> + struct fwnode_handle *i2c_handle;
>> + int ret;
>> +
>> + i2c_handle = device_get_named_child_node(dev, "i2c");
>> + if (!i2c_handle)
>> + return 0;
>> +
>> + ret = i2c_atr_add_adapter(priv->plat_data->atr, priv->plat_data->port,
>> + i2c_handle);
>> +
>> + fwnode_handle_put(i2c_handle);
>> +
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>> +
>> +static const struct regmap_config ub953_regmap_config = {
>> + .name = "ds90ub953",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> + .reg_format_endian = REGMAP_ENDIAN_DEFAULT,
>> + .val_format_endian = REGMAP_ENDIAN_DEFAULT,
>> +};
>> +
>> +static int ub953_parse_dt(struct ub953_data *priv)
>> +{
>> + struct device_node *np = priv->client->dev.of_node;
>> + struct device *dev = &priv->client->dev;
>> + struct device_node *ep_np;
>> + int ret;
>> +
>> + if (!np) {
>> + dev_err(dev, "OF: no device tree node!\n");
>> + return -ENOENT;
>> + }
>> +
>> + ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
>> + if (!ep_np) {
>> + dev_err(dev, "OF: no endpoint\n");
>> + return -ENOENT;
>> + }
>> +
>> + ret = of_property_count_u32_elems(ep_np, "data-lanes");
>> +
>> + of_node_put(ep_np);
>> +
>> + if (ret <= 0) {
>> + dev_err(dev, "OF: failed to parse data-lanes: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + if (ret != 1 && ret != 2 && ret != 4) {
>> + dev_err(dev, "OF: bad number of data-lanes: %d\n", ret);
>> + return -EINVAL;
>> + }
>> +
>> + priv->num_data_lanes = ret;
>> +
>> + return 0;
>> +}
>> +
>> +static int ub953_probe(struct i2c_client *client)
>> +{
>> + struct device *dev = &client->dev;
>> + struct ub953_data *priv;
>> + int ret;
>> + u8 v;
>> + bool mode_override;
>> +
>> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
>> + if (!priv)
>> + return -ENOMEM;
>> +
>> + priv->client = client;
>> +
>> + priv->hw_data = of_device_get_match_data(dev);
>> + if (!priv->hw_data)
>> + return -ENODEV;
>> +
>> + priv->plat_data = dev_get_platdata(&client->dev);
>> + if (!priv->plat_data) {
>> + dev_err(dev, "Platform data missing\n");
>> + return -ENODEV;
>> + }
>> +
>> + mutex_init(&priv->reg_lock);
>> +
>> + /*
>> + * Initialize to invalid values so that the first reg writes will
>> + * configure the target.
>> + */
>> + priv->current_indirect_target = 0xff;
>> +
>> + priv->regmap = devm_regmap_init_i2c(client, &ub953_regmap_config);
>> + if (IS_ERR(priv->regmap)) {
>> + dev_err(dev, "Failed to init regmap\n");
>> + ret = PTR_ERR(priv->regmap);
>> + goto err_mutex_destroy;
>> + }
>> +
>> + ret = ub953_parse_dt(priv);
>> + if (ret)
>> + goto err_mutex_destroy;
>> +
>> + ret = ub953_read(priv, UB953_REG_MODE_SEL, &v);
>> + if (ret)
>> + goto err_mutex_destroy;
>> +
>> + if (!(v & UB953_REG_MODE_SEL_MODE_DONE)) {
>> + dev_err(dev, "Mode value not stabilized\n");
>> + ret = -ENODEV;
>> + goto err_mutex_destroy;
>> + }
>> +
>> + mode_override = v & UB953_REG_MODE_SEL_MODE_OVERRIDE;
>> +
>> + switch (v & UB953_REG_MODE_SEL_MODE_MASK) {
>> + case 0:
>> + priv->mode = UB953_MODE_SYNC;
>> + break;
>> + case 2:
>> + priv->mode = UB953_MODE_NONSYNC_EXT;
>> + break;
>> + case 3:
>> + priv->mode = UB953_MODE_NONSYNC_INT;
>> + break;
>> + case 5:
>> + priv->mode = UB953_MODE_DVP;
>> + break;
>> + default:
>> + dev_err(dev, "Illegal mode in mode register\n");
>> + ret = -ENODEV;
>> + goto err_mutex_destroy;
>> + }
>> +
>> + dev_dbg(dev, "mode from %s: %#x\n", mode_override ? "reg" : "strap",
>> + priv->mode);
>> +
>> + if (priv->mode != UB953_MODE_SYNC) {
>> + dev_err(dev, "Only synchronous mode supported\n");
>> + ret = -ENODEV;
>> + goto err_mutex_destroy;
>> + }
>> +
>> + ret = ub953_read(priv, UB953_REG_REV_MASK_ID, &v);
>> + if (ret) {
>> + dev_err(dev, "Failed to read revision: %d", ret);
>> + goto err_mutex_destroy;
>> + }
>> +
>> + dev_info(dev, "Found %s rev/mask %#04x\n", priv->hw_data->model, v);
>> +
>> + ret = ub953_read(priv, UB953_REG_GENERAL_CFG, &v);
>> + if (ret)
>> + goto err_mutex_destroy;
>> +
>> + dev_dbg(dev, "i2c strap setting %s V\n",
>> + (v & UB953_REG_GENERAL_CFG_I2C_STRAP_MODE) ? "1.8" : "3.3");
>
> Please move the hardware checks and initialization to a separate
> function, probe() is too big.
Yep.
>> +
>> + ret = ub953_i2c_master_init(priv);
>> + if (ret) {
>> + dev_err(dev, "i2c init failed: %d\n", ret);
>> + goto err_mutex_destroy;
>> + }
>> +
>> + ret = ub953_gpiochip_probe(priv);
>> + if (ret) {
>> + dev_err(dev, "Failed to init gpiochip\n");
>> + goto err_mutex_destroy;
>> + }
>> +
>> + ub953_write(priv, UB953_REG_GENERAL_CFG,
>> + UB953_REG_GENERAL_CFG_CONT_CLK |
>> + ((priv->num_data_lanes - 1) << UB953_REG_GENERAL_CFG_CSI_LANE_SEL_SHIFT) |
>> + UB953_REG_GENERAL_CFG_CRC_TX_GEN_ENABLE);
>
> This too.
>
>> +
>> + ret = ub953_register_clkout(priv);
>> + if (ret) {
>> + dev_err(dev, "Failed to register clkout\n");
>> + goto err_gpiochip_remove;
>> + }
>> +
>> + v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub953_subdev_ops);
>> +
>> + v4l2_ctrl_handler_init(&priv->ctrl_handler,
>> + ARRAY_SIZE(ub953_tpg_qmenu) - 1);
>> + priv->sd.ctrl_handler = &priv->ctrl_handler;
>> +
>> + v4l2_ctrl_new_std_menu_items(&priv->ctrl_handler, &ub953_ctrl_ops,
>> + V4L2_CID_TEST_PATTERN,
>> + ARRAY_SIZE(ub953_tpg_qmenu) - 1, 0, 0,
>> + ub953_tpg_qmenu);
>> +
>> + if (priv->ctrl_handler.error) {
>> + ret = priv->ctrl_handler.error;
>> + goto err_gpiochip_remove;
>> + }
>> +
>> + priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS |
>> + V4L2_SUBDEV_FL_STREAMS;
>> + priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
>> + priv->sd.entity.ops = &ub953_entity_ops;
>> +
>> + priv->pads[0].flags = MEDIA_PAD_FL_SINK;
>> + priv->pads[1].flags = MEDIA_PAD_FL_SOURCE;
>> +
>> + ret = media_entity_pads_init(&priv->sd.entity, 2, priv->pads);
>> + if (ret) {
>> + dev_err(dev, "Failed to init pads\n");
>> + goto err_remove_ctrls;
>> + }
>> +
>> + priv->tx_ep_np = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
>
> Error handling ?
Will add.
>> + priv->sd.fwnode = of_fwnode_handle(priv->tx_ep_np);
>> +
>> + priv->sd.state_lock = priv->sd.ctrl_handler->lock;
>> +
>> + ret = v4l2_subdev_init_finalize(&priv->sd);
>> + if (ret)
>> + goto err_entity_cleanup;
>
> I think I would move subdev init to a separate function too.
Yes.
>> +
>> + ret = ub953_v4l2_notifier_register(priv);
>> + if (ret) {
>> + dev_err(dev, "v4l2 subdev notifier register failed: %d\n", ret);
>> + goto err_free_state;
>> + }
>> +
>> + ret = v4l2_async_register_subdev(&priv->sd);
>> + if (ret) {
>> + dev_err(dev, "v4l2_async_register_subdev error: %d\n", ret);
>> + goto err_unreg_notif;
>> + }
>> +
>> + ret = ub953_add_i2c_adapter(priv);
>> + if (ret) {
>> + dev_err(dev, "failed to add remote i2c adapter\n");
>> + goto err_unreg_async_subdev;
>> + }
>> +
>> + return 0;
>> +
>> +err_unreg_async_subdev:
>> + v4l2_async_unregister_subdev(&priv->sd);
>> +err_unreg_notif:
>> + ub953_v4l2_notifier_unregister(priv);
>> +err_free_state:
>> + v4l2_subdev_cleanup(&priv->sd);
>> +err_entity_cleanup:
>> + if (priv->tx_ep_np)
>> + of_node_put(priv->tx_ep_np);
>> +
>> + media_entity_cleanup(&priv->sd.entity);
>> +err_remove_ctrls:
>> + v4l2_ctrl_handler_free(&priv->ctrl_handler);
>> +err_gpiochip_remove:
>> + ub953_gpiochip_remove(priv);
>> +err_mutex_destroy:
>> + mutex_destroy(&priv->reg_lock);
>> +
>> + return ret;
>> +}
>> +
>> +static void ub953_remove(struct i2c_client *client)
>> +{
>> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
>> + struct ub953_data *priv = sd_to_ub953(sd);
>> +
>> + i2c_atr_del_adapter(priv->plat_data->atr,
>> + priv->plat_data->port);
>> +
>> + v4l2_async_unregister_subdev(&priv->sd);
>> +
>> + ub953_v4l2_notifier_unregister(priv);
>> +
>> + v4l2_subdev_cleanup(&priv->sd);
>> +
>> + of_node_put(priv->tx_ep_np);
>> +
>> + media_entity_cleanup(&priv->sd.entity);
>> +
>> + v4l2_ctrl_handler_free(&priv->ctrl_handler);
>> +
>> + ub953_gpiochip_remove(priv);
>> + mutex_destroy(&priv->reg_lock);
>> +}
>> +
>> +static const struct ub953_hw_data ds90ub953_hw = {
>> + .model = "ub953",
>> +};
>> +
>> +static const struct ub953_hw_data ds90ub971_hw = {
>> + .model = "ub971",
>> + .ub971 = true,
>> +};
>> +
>> +static const struct i2c_device_id ub953_id[] = {
>> + { "ds90ub953-q1", 0 },
>> + { "ds90ub971-q1", 0 },
>> + {}
>> +};
>> +MODULE_DEVICE_TABLE(i2c, ub953_id);
>> +
>> +#ifdef CONFIG_OF
>> +static const struct of_device_id ub953_dt_ids[] = {
>> + { .compatible = "ti,ds90ub953-q1", .data = &ds90ub953_hw },
>> + { .compatible = "ti,ds90ub971-q1", .data = &ds90ub971_hw },
>> + {}
>> +};
>> +MODULE_DEVICE_TABLE(of, ub953_dt_ids);
>> +#endif
>> +
>> +static struct i2c_driver ds90ub953_driver = {
>> + .probe_new = ub953_probe,
>> + .remove = ub953_remove,
>> + .id_table = ub953_id,
>> + .driver = {
>> + .name = "ds90ub953",
>> + .owner = THIS_MODULE,
>> + .of_match_table = of_match_ptr(ub953_dt_ids),
>> + },
>> +};
>> +
>> +module_i2c_driver(ds90ub953_driver);
>> +
>> +MODULE_LICENSE("GPL");
>> +MODULE_DESCRIPTION("Texas Instruments DS90UB953 serializer driver");
>> +MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
>> +MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
>> +MODULE_IMPORT_NS(I2C_ATR);
Tomi
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [PATCH v6 0/8] i2c-atr and FPDLink
2023-01-05 14:02 [PATCH v6 0/8] i2c-atr and FPDLink Tomi Valkeinen
` (7 preceding siblings ...)
2023-01-05 14:03 ` [PATCH v6 8/8] media: i2c: add DS90UB953 driver Tomi Valkeinen
@ 2023-01-05 14:05 ` Tomi Valkeinen
8 siblings, 0 replies; 33+ messages in thread
From: Tomi Valkeinen @ 2023-01-05 14:05 UTC (permalink / raw)
To: linux-media, devicetree, linux-kernel, linux-i2c, Rob Herring,
Krzysztof Kozlowski, Wolfram Sang, Luca Ceresoli,
Andy Shevchenko, Matti Vaittinen
Cc: Mauro Carvalho Chehab, Peter Rosin, Liam Girdwood, Mark Brown,
Sakari Ailus, Laurent Pinchart, Michael Tretter, Shawn Tu,
Hans Verkuil, Mike Pagano, Krzysztof Hałasa, Marek Vasut,
Tomi Valkeinen
On 05/01/2023 16:02, Tomi Valkeinen wrote:
> Hi,
>
> You can find the v5 from:
>
> https://lore.kernel.org/all/20221208104006.316606-1-tomi.valkeinen@ideasonboard.com/
>
> There has again been quite a lot of changes. I will send a diff of v5 to
> v6 separately to give a better idea of the changes. Here's are some of
> the changes:
And here's the diff:
diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
index 3a5b34c6bb64..f6612bb0f667 100644
--- a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub913.yaml
@@ -4,13 +4,13 @@
$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub913.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
-title: Texas Instruments DS90UB913 FPD-Link 3 Serializer
+title: Texas Instruments DS90UB913 FPD-Link III Serializer
maintainers:
- Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
description:
- The TI DS90UB913 is an FPD-Link 3 video serializer for parallel video.
+ The TI DS90UB913 is an FPD-Link III video serializer for parallel video.
properties:
compatible:
@@ -19,6 +19,10 @@ properties:
'#gpio-cells':
const: 2
+ description:
+ First cell is the GPO pin number, second cell is the flags. The GPO pin
+ number must be in range of [0, 3]. Note that GPOs 2 and 3 are not
+ available in external oscillator mode.
gpio-controller: true
@@ -41,17 +45,24 @@ properties:
port@0:
$ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
- description: CSI-2 input port
+ description: Parallel input port
properties:
endpoint:
$ref: /schemas/media/video-interfaces.yaml#
unevaluatedProperties: false
+ required:
+ - pclk-sample
+
port@1:
$ref: /schemas/graph.yaml#/properties/port
unevaluatedProperties: false
- description: FPD-Link 3 output port
+ description: FPD-Link III output port
+
+ required:
+ - port@0
+ - port@1
i2c:
$ref: /schemas/i2c/i2c-controller.yaml#
@@ -89,6 +100,7 @@ examples:
reg = <0>;
ub913_in: endpoint {
remote-endpoint = <&sensor_out>;
+ pclk-sample = <1>;
};
};
diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
index fd7d25d93e2c..2030366994d1 100644
--- a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub953.yaml
@@ -4,13 +4,13 @@
$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub953.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
-title: Texas Instruments DS90UB953 FPD-Link 3 Serializer
+title: Texas Instruments DS90UB953 FPD-Link III Serializer
maintainers:
- Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
description:
- The TI DS90UB953 is an FPD-Link 3 video serializer for MIPI CSI-2.
+ The TI DS90UB953 is an FPD-Link III video serializer for MIPI CSI-2.
properties:
compatible:
@@ -20,9 +20,21 @@ properties:
'#gpio-cells':
const: 2
+ description:
+ First cell is the GPIO pin number, second cell is the flags. The GPIO pin
+ number must be in range of [0, 3].
gpio-controller: true
+ clocks:
+ maxItems: 1
+ description:
+ Reference clock connected to the CLKIN pin.
+
+ clock-names:
+ items:
+ - const: clkin
+
'#clock-cells':
const: 0
@@ -40,10 +52,17 @@ properties:
$ref: /schemas/media/video-interfaces.yaml#
unevaluatedProperties: false
+ required:
+ - data-lanes
+
port@1:
$ref: /schemas/graph.yaml#/properties/port
unevaluatedProperties: false
- description: FPD-Link 3 output port
+ description: FPD-Link III output port
+
+ required:
+ - port@0
+ - port@1
i2c:
$ref: /schemas/i2c/i2c-controller.yaml#
@@ -101,6 +120,9 @@ examples:
reset-gpios = <&serializer 0 GPIO_ACTIVE_LOW>;
+ clocks = <&serializer>;
+ clock-names = "inck";
+
port {
sensor_out: endpoint {
remote-endpoint = <&ub953_in>;
diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
index d8b5e219d420..664799ae55be 100644
--- a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
@@ -21,8 +21,6 @@ properties:
reg:
maxItems: 1
- description:
- i2c addresses for the deserializer and the serializers
clocks:
maxItems: 1
@@ -41,12 +39,13 @@ properties:
i2c-alias-pool:
$ref: /schemas/types.yaml#/definitions/uint16-array
description:
- i2c alias pool is a pool of i2c addresses on the main i2c bus that can be
- used to access the remote peripherals. The addresses must be available,
- not used by any other peripheral. Each remote peripheral is assigned an
- alias from the pool, and transactions to that address will be forwarded
- to the remote peripheral, with the address translated to the remote
- peripheral's real address.
+ I2C alias pool is a pool of I2C addresses on the main I2C bus that can be
+ used to access the remote peripherals on the serializer's I2C bus. The
+ addresses must be available, not used by any other peripheral. Each
+ remote peripheral is assigned an alias from the pool, and transactions to
+ that address will be forwarded to the remote peripheral, with the address
+ translated to the remote peripheral's real address. This property is not
+ needed if there are no I2C addressable remote peripherals.
links:
type: object
@@ -65,7 +64,7 @@ properties:
Enable manual strobe position and EQ level
patternProperties:
- '^link@[0-9a-f]+$':
+ '^link@[0-3]$':
type: object
additionalProperties: false
properties:
@@ -75,8 +74,8 @@ properties:
i2c-alias:
description:
- The i2c address used for the serializer. Transactions to this
- address on the i2c bus where the deserializer resides are
+ The I2C address used for the serializer. Transactions to this
+ address on the I2C bus where the deserializer resides are
forwarded to the serializer.
ti,rx-mode:
@@ -87,14 +86,18 @@ properties:
- 2 # RAW12 LF
- 3 # CSI2 SYNC
- 4 # CSI2 NON-SYNC
- description: FPD-Link Input Mode
+ description:
+ FPD-Link Input Mode. This should reflect the hardware and the
+ default mode of the connected camera module.
ti,cdr-mode:
$ref: /schemas/types.yaml#/definitions/uint32
enum:
- - 0 # FPD3
- - 1 # FPD4
- description: FPD-Link CDR Mode
+ - 0 # FPD-Link III
+ - 1 # FPD-Link IV
+ description:
+ FPD-Link CDR Mode. This should reflect the hardware and the
+ default mode of the connected camera module.
ti,strobe-pos:
$ref: /schemas/types.yaml#/definitions/int32
@@ -122,25 +125,57 @@ properties:
properties:
port@0:
- $ref: /schemas/graph.yaml#/properties/port
+ $ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
description: FPD-Link input 0
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+ description:
+ Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+ hsync-active and vsync-active must be defined.
+
port@1:
- $ref: /schemas/graph.yaml#/properties/port
+ $ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
description: FPD-Link input 1
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+ description:
+ Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+ hsync-active and vsync-active must be defined.
+
port@2:
- $ref: /schemas/graph.yaml#/properties/port
+ $ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
description: FPD-Link input 2
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+ description:
+ Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+ hsync-active and vsync-active must be defined.
+
port@3:
- $ref: /schemas/graph.yaml#/properties/port
+ $ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
description: FPD-Link input 3
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+ description:
+ Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+ hsync-active and vsync-active must be defined.
+
port@4:
$ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
@@ -156,6 +191,9 @@ properties:
minItems: 1
maxItems: 4
+ required:
+ - data-lanes
+
port@5:
$ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
@@ -171,6 +209,9 @@ properties:
minItems: 1
maxItems: 4
+ required:
+ - data-lanes
+
required:
- compatible
- reg
@@ -219,6 +260,8 @@ examples:
ub960_fpd3_2_in: endpoint {
remote-endpoint = <&ub913_2_out>;
+ hsync-active = <0>;
+ vsync-active = <1>;
};
};
@@ -321,6 +364,7 @@ examples:
reg = <0>;
ub913_2_in: endpoint {
remote-endpoint = <&sensor_2_out>;
+ pclk-sample = <1>;
};
};
diff --git a/Documentation/i2c/muxes/i2c-atr.rst b/Documentation/i2c/muxes/i2c-atr.rst
index 14597c9ec19b..c7e060ca682d 100644
--- a/Documentation/i2c/muxes/i2c-atr.rst
+++ b/Documentation/i2c/muxes/i2c-atr.rst
@@ -76,3 +76,8 @@ Usage:
alias_id parameter
3. When the detach callback is called, deconfigure the alias from
your chip and put it back in the pool for later usage
+
+I2C ATR functions and data structures
+-------------------------------------
+
+.. kernel-doc:: include/linux/i2c-atr.h
diff --git a/MAINTAINERS b/MAINTAINERS
index ba716f2861cf..d0dc8572191d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20626,6 +20626,14 @@ F: drivers/misc/tifm*
F: drivers/mmc/host/tifm_sd.c
F: include/linux/tifm.h
+TI FPD-LINK DRIVERS
+M: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/ti,ds90*
+F: drivers/media/i2c/ds90*
+F: include/media/i2c/ds90*
+
TI KEYSTONE MULTICORE NAVIGATOR DRIVERS
M: Nishanth Menon <nm@ti.com>
M: Santosh Shilimkar <ssantosh@kernel.org>
diff --git a/drivers/i2c/i2c-atr.c b/drivers/i2c/i2c-atr.c
index 1d3b25a6550f..0668c98886ad 100644
--- a/drivers/i2c/i2c-atr.c
+++ b/drivers/i2c/i2c-atr.c
@@ -3,6 +3,7 @@
* I2C Address Translator
*
* Copyright (c) 2019,2022 Luca Ceresoli <luca@lucaceresoli.net>
+ * Copyright (c) 2022,2023 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
*
* Originally based on i2c-mux.c
*/
@@ -19,7 +20,7 @@
#define ATR_MAX_SYMLINK_LEN 16 /* Longest name is 10 chars: "channel-99" */
/**
- * struct i2c_atr_cli2alias_pair - Hold the alias assigned to a client.
+ * struct i2c_atr_cli2alias_pair - Holds the alias assigned to a client.
* @node: List node
* @client: Pointer to the client on the child bus
* @alias: I2C alias address assigned by the driver.
@@ -32,7 +33,17 @@ struct i2c_atr_cli2alias_pair {
u16 alias;
};
-/* Data for each channel (child bus) */
+/**
+ * struct i2c_atr_chan - Data for a channel.
+ * @adap: The &struct i2c_adapter for the channel
+ * @atr: The parent I2C ATR
+ * @chan_id: The ID of this channel
+ * @alias_list: List of @struct i2c_atr_cli2alias_pair containing the
+ * assigned aliases
+ * @orig_addrs_lock: Mutex protecting @orig_addrs
+ * @orig_addrs: Buffer used to store the original addresses during transmit
+ * @orig_addrs_size: Size of @orig_addrs
+ */
struct i2c_atr_chan {
struct i2c_adapter adap;
struct i2c_atr *atr;
@@ -40,9 +51,36 @@ struct i2c_atr_chan {
struct list_head alias_list;
+ /* Lock orig_addrs during xfer */
+ struct mutex orig_addrs_lock;
u16 *orig_addrs;
unsigned int orig_addrs_size;
- struct mutex orig_addrs_lock; /* Lock orig_addrs during xfer */
+};
+
+/**
+ * struct i2c_atr - The I2C ATR instance
+ * @parent: The parent &struct i2c_adapter
+ * @dev: The device that owns the I2C ATR instance
+ * @ops: &struct i2c_atr_ops
+ * @priv: Private driver data, set with i2c_atr_set_driver_data()
+ * @algo: The &struct i2c_algorithm for adapters
+ * @lock: Lock for the I2C bus segment (see &struct i2c_lock_operations)
+ * @max_adapters: Maximum number of adapters this I2C ATR can have
+ * @adapter: Array of adapters
+ */
+struct i2c_atr {
+ struct i2c_adapter *parent;
+ struct device *dev;
+ const struct i2c_atr_ops *ops;
+
+ void *priv;
+
+ struct i2c_algorithm algo;
+ /* lock for the I2C bus segment (see struct i2c_lock_operations) */
+ struct mutex lock;
+ int max_adapters;
+
+ struct i2c_adapter *adapter[];
};
static struct i2c_atr_cli2alias_pair *
@@ -90,8 +128,7 @@ static int i2c_atr_map_msgs(struct i2c_atr_chan *chan, struct i2c_msg *msgs,
if (unlikely(chan->orig_addrs_size < num)) {
u16 *new_buf;
- new_buf = kmalloc_array(num, sizeof(chan->orig_addrs[0]),
- GFP_KERNEL);
+ new_buf = kmalloc_array(num, sizeof(*new_buf), GFP_KERNEL);
if (!new_buf)
return -ENOMEM;
@@ -252,10 +289,6 @@ static int i2c_atr_attach_client(struct i2c_adapter *adapter,
&alias_id);
if (ret)
goto err_free;
- if (alias_id == 0) {
- ret = -EINVAL;
- goto err_free;
- }
c2a->client = client;
c2a->alias = alias_id;
@@ -265,6 +298,7 @@ static int i2c_atr_attach_client(struct i2c_adapter *adapter,
err_free:
kfree(c2a);
+
return ret;
}
@@ -289,27 +323,45 @@ static const struct i2c_attach_operations i2c_atr_attach_ops = {
.detach_client = i2c_atr_detach_client,
};
-/**
- * i2c_atr_add_adapter - Create a child ("downstream") I2C bus.
- * @atr: The I2C ATR
- * @chan_id: Index of the new adapter (0 .. max_adapters-1). This value is
- * passed to the callbacks in `struct i2c_atr_ops`.
- * @bus_handle: The fwnode handle that points to the adapter's i2c
- * peripherals, or NULL.
- *
- * After calling this function a new i2c bus will appear. Adding and
- * removing devices on the downstream bus will result in calls to the
- * `attach_client` and `detach_client` callbacks for the driver to assign
- * an alias to the device.
- *
- * The adapter's fwnode is set to 'bus_handle', or if 'bus_handle' is NULL the
- * function looks for a child node whose 'reg' property matches the chan_id
- * under the i2c-atr device's 'i2c-atr' node.
+struct i2c_atr *i2c_atr_new(struct i2c_adapter *parent, struct device *dev,
+ const struct i2c_atr_ops *ops, int max_adapters)
+{
+ struct i2c_atr *atr;
+
+ if (max_adapters > ATR_MAX_ADAPTERS)
+ return ERR_PTR(-EINVAL);
+
+ if (!ops || !ops->attach_client || !ops->detach_client)
+ return ERR_PTR(-EINVAL);
+
+ atr = devm_kzalloc(dev, struct_size(atr, adapter, max_adapters),
+ GFP_KERNEL);
+ if (!atr)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&atr->lock);
+
+ atr->parent = parent;
+ atr->dev = dev;
+ atr->ops = ops;
+ atr->max_adapters = max_adapters;
+
+ if (parent->algo->master_xfer)
+ atr->algo.master_xfer = i2c_atr_master_xfer;
+ if (parent->algo->smbus_xfer)
+ atr->algo.smbus_xfer = i2c_atr_smbus_xfer;
+ atr->algo.functionality = i2c_atr_functionality;
+
+ return atr;
+}
+EXPORT_SYMBOL_NS_GPL(i2c_atr_new, I2C_ATR);
+
+void i2c_atr_delete(struct i2c_atr *atr)
+{
+ mutex_destroy(&atr->lock);
+}
+EXPORT_SYMBOL_NS_GPL(i2c_atr_delete, I2C_ATR);
- * Call i2c_atr_del_adapter() to remove the adapter.
- *
- * Return: 0 on success, a negative error code otherwise.
- */
int i2c_atr_add_adapter(struct i2c_atr *atr, u32 chan_id,
struct fwnode_handle *bus_handle)
{
@@ -375,7 +427,7 @@ int i2c_atr_add_adapter(struct i2c_atr *atr, u32 chan_id,
if (ret) {
dev_err(dev, "failed to add atr-adapter %u (error=%d)\n",
chan_id, ret);
- goto err_mutex_destroy;
+ goto err_fwnode_put;
}
snprintf(symlink_name, sizeof(symlink_name), "channel-%u",
@@ -391,22 +443,17 @@ int i2c_atr_add_adapter(struct i2c_atr *atr, u32 chan_id,
dev_dbg(dev, "Added ATR child bus %d\n", i2c_adapter_id(&chan->adap));
atr->adapter[chan_id] = &chan->adap;
+
return 0;
-err_mutex_destroy:
+err_fwnode_put:
fwnode_handle_put(dev_fwnode(&chan->adap.dev));
mutex_destroy(&chan->orig_addrs_lock);
kfree(chan);
return ret;
}
-EXPORT_SYMBOL_GPL(i2c_atr_add_adapter);
+EXPORT_SYMBOL_NS_GPL(i2c_atr_add_adapter, I2C_ATR);
-/**
- * i2c_atr_del_adapter - Remove a child ("downstream") I2C bus added by
- * i2c_atr_del_adapter().
- * @atr: The I2C ATR
- * @chan_id: Index of the `adapter to be removed (0 .. max_adapters-1)
- */
void i2c_atr_del_adapter(struct i2c_atr *atr, u32 chan_id)
{
char symlink_name[ATR_MAX_SYMLINK_LEN];
@@ -416,10 +463,8 @@ void i2c_atr_del_adapter(struct i2c_atr *atr, u32 chan_id)
struct fwnode_handle *fwnode = dev_fwnode(&adap->dev);
struct device *dev = atr->dev;
- if (!atr->adapter[chan_id]) {
- dev_err(dev, "Adapter %d does not exist\n", chan_id);
+ if (!adap)
return;
- }
dev_dbg(dev, "Removing ATR child bus %d\n", i2c_adapter_id(adap));
@@ -436,68 +481,21 @@ void i2c_atr_del_adapter(struct i2c_atr *atr, u32 chan_id)
kfree(chan->orig_addrs);
kfree(chan);
}
-EXPORT_SYMBOL_GPL(i2c_atr_del_adapter);
+EXPORT_SYMBOL_NS_GPL(i2c_atr_del_adapter, I2C_ATR);
-/**
- * i2c_atr_new() - Allocate and initialize an I2C ATR helper.
- * @parent: The parent (upstream) adapter
- * @dev: The device acting as an ATR
- * @ops: Driver-specific callbacks
- * @max_adapters: Maximum number of child adapters
- *
- * The new ATR helper is connected to the parent adapter but has no child
- * adapters. Call i2c_atr_add_adapter() to add some.
- *
- * Call i2c_atr_delete() to remove.
- *
- * Return: pointer to the new ATR helper object, or ERR_PTR
- */
-struct i2c_atr *i2c_atr_new(struct i2c_adapter *parent, struct device *dev,
- const struct i2c_atr_ops *ops, int max_adapters)
+void i2c_atr_set_driver_data(struct i2c_atr *atr, void *data)
{
- struct i2c_atr *atr;
-
- if (max_adapters > ATR_MAX_ADAPTERS)
- return ERR_PTR(-EINVAL);
-
- if (!ops || !ops->attach_client || !ops->detach_client)
- return ERR_PTR(-EINVAL);
-
- atr = devm_kzalloc(dev, struct_size(atr, adapter, max_adapters),
- GFP_KERNEL);
- if (!atr)
- return ERR_PTR(-ENOMEM);
-
- mutex_init(&atr->lock);
-
- atr->parent = parent;
- atr->dev = dev;
- atr->ops = ops;
- atr->max_adapters = max_adapters;
-
- if (parent->algo->master_xfer)
- atr->algo.master_xfer = i2c_atr_master_xfer;
- if (parent->algo->smbus_xfer)
- atr->algo.smbus_xfer = i2c_atr_smbus_xfer;
- atr->algo.functionality = i2c_atr_functionality;
-
- return atr;
+ atr->priv = data;
}
-EXPORT_SYMBOL_GPL(i2c_atr_new);
+EXPORT_SYMBOL_NS_GPL(i2c_atr_set_driver_data, I2C_ATR);
-/**
- * i2c_atr_delete - Delete an I2C ATR helper.
- * @atr: I2C ATR helper to be deleted.
- *
- * Precondition: all the adapters added with i2c_atr_add_adapter() mumst be
- * removed by calling i2c_atr_del_adapter().
- */
-void i2c_atr_delete(struct i2c_atr *atr)
+void *i2c_atr_get_driver_data(struct i2c_atr *atr)
{
- mutex_destroy(&atr->lock);
+ return atr->priv;
}
-EXPORT_SYMBOL_GPL(i2c_atr_delete);
+EXPORT_SYMBOL_NS_GPL(i2c_atr_get_driver_data, I2C_ATR);
-MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
+MODULE_AUTHOR("Luca Ceresoli <luca.ceresoli@bootlin.com>");
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
MODULE_DESCRIPTION("I2C Address Translator");
MODULE_LICENSE("GPL");
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 1bb60f256a1e..8a0888ba89e5 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -916,6 +916,7 @@ int i2c_dev_irq_from_resources(const struct resource *resources,
struct i2c_client *
i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
{
+ const struct i2c_attach_operations *attach_ops;
struct i2c_client *client;
int status;
@@ -967,9 +968,10 @@ i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *inf
}
}
- if (adap->attach_ops &&
- adap->attach_ops->attach_client &&
- adap->attach_ops->attach_client(adap, info, client) != 0)
+ attach_ops = adap->attach_ops;
+
+ if (attach_ops && attach_ops->attach_client &&
+ attach_ops->attach_client(adap, info, client))
goto out_remove_swnode;
status = device_register(&client->dev);
@@ -982,8 +984,8 @@ i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *inf
return client;
out_detach_client:
- if (adap->attach_ops && adap->attach_ops->detach_client)
- adap->attach_ops->detach_client(adap, client);
+ if (attach_ops && attach_ops->detach_client)
+ attach_ops->detach_client(adap, client);
out_remove_swnode:
device_remove_software_node(&client->dev);
out_err_put_of_node:
@@ -1005,16 +1007,17 @@ EXPORT_SYMBOL_GPL(i2c_new_client_device);
*/
void i2c_unregister_device(struct i2c_client *client)
{
+ const struct i2c_attach_operations *attach_ops;
struct i2c_adapter *adap;
if (IS_ERR_OR_NULL(client))
return;
adap = client->adapter;
+ attach_ops = adap->attach_ops;
- if (adap->attach_ops &&
- adap->attach_ops->detach_client)
- adap->attach_ops->detach_client(adap, client);
+ if (attach_ops && attach_ops->detach_client)
+ attach_ops->detach_client(adap, client);
if (client->dev.of_node) {
of_node_clear_flag(client->dev.of_node, OF_POPULATED);
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index b24f89f58807..29594c724307 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -1596,13 +1596,13 @@ config VIDEO_THS7303
endmenu
#
-# Video serializers and deserializers (e.g. FPDLink)
+# Video serializers and deserializers (e.g. FPD-Link)
#
menu "Video serializers and deserializers"
-config VIDEO_DS90UB960
- tristate "TI DS90UB960 Deserializer"
+config VIDEO_DS90UB913
+ tristate "TI DS90UB913 Serializer"
depends on OF && I2C && VIDEO_DEV
select MEDIA_CONTROLLER
select VIDEO_V4L2_SUBDEV_API
@@ -1611,11 +1611,11 @@ config VIDEO_DS90UB960
select OF_GPIO
select I2C_ATR
help
- Device driver for the Texas Instruments DS90UB960
- FPD-Link III Deserializer
+ Device driver for the Texas Instruments DS90UB913
+ FPD-Link III Serializer.
-config VIDEO_DS90UB913
- tristate "TI DS90UB913 Serializer"
+config VIDEO_DS90UB953
+ tristate "TI DS90UB953 Serializer"
depends on OF && I2C && VIDEO_DEV
select MEDIA_CONTROLLER
select VIDEO_V4L2_SUBDEV_API
@@ -1624,11 +1624,11 @@ config VIDEO_DS90UB913
select OF_GPIO
select I2C_ATR
help
- Device driver for the Texas Instruments DS90UB913
- FPD-Link III Serializer.
+ Device driver for the Texas Instruments DS90UB953
+ FPD-Link III Serializer and DS90UB971 FPD-Link IV Serializer.
-config VIDEO_DS90UB953
- tristate "TI DS90UB953 Serializer"
+config VIDEO_DS90UB960
+ tristate "TI DS90UB960 Deserializer"
depends on OF && I2C && VIDEO_DEV
select MEDIA_CONTROLLER
select VIDEO_V4L2_SUBDEV_API
@@ -1637,8 +1637,8 @@ config VIDEO_DS90UB953
select OF_GPIO
select I2C_ATR
help
- Device driver for the Texas Instruments DS90UB953
- FPD-Link III Serializer.
+ Device driver for the Texas Instruments DS90UB960
+ FPD-Link III Deserializer and DS90UB9702 FPD-Link IV Deserializer.
endmenu
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 377cdf6fa30b..efd5f717a5f7 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -142,6 +142,6 @@ obj-$(CONFIG_VIDEO_VPX3220) += vpx3220.o
obj-$(CONFIG_VIDEO_VS6624) += vs6624.o
obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
-obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
obj-$(CONFIG_VIDEO_DS90UB913) += ds90ub913.o
obj-$(CONFIG_VIDEO_DS90UB953) += ds90ub953.o
+obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
diff --git a/drivers/media/i2c/ds90ub913.c b/drivers/media/i2c/ds90ub913.c
index 6001a622e622..0a60afb09cd3 100644
--- a/drivers/media/i2c/ds90ub913.c
+++ b/drivers/media/i2c/ds90ub913.c
@@ -37,7 +37,12 @@
#define UB913_REG_RESET_CTL_DIGITAL_RESET_0 BIT(0)
#define UB913_REG_GENERAL_CFG 0x03
+#define UB913_REG_GENERAL_CFG_CRC_ERR_RESET BIT(5)
+#define UB913_REG_GENERAL_CFG_PCLK_RISING BIT(0)
+
#define UB913_REG_MODE_SEL 0x05
+#define UB913_REG_MODE_SEL_MODE_UP_TO_DATE BIT(4)
+#define UB913_REG_MODE_SEL_MODE_OVERRIDE BIT(5)
#define UB913_REG_CRC_ERRORS_LSB 0x0a
#define UB913_REG_CRC_ERRORS_MSB 0x0b
@@ -61,8 +66,6 @@ struct ub913_data {
struct regmap *regmap;
struct clk *clkin;
- u32 gpio_func[UB913_NUM_GPIOS];
-
struct gpio_chip gpio_chip;
char gpio_chip_name[64];
@@ -81,8 +84,7 @@ struct ub913_data {
struct ds90ub9xx_platform_data *plat_data;
- /* Have we succefully called i2c_atr_add_adapter() */
- bool has_i2c_adapter;
+ u32 pclk_polarity;
};
static inline struct ub913_data *sd_to_ub913(struct v4l2_subdev *sd)
@@ -200,26 +202,6 @@ static void ub913_gpiochip_remove(struct ub913_data *priv)
gpiochip_remove(&priv->gpio_chip);
}
-static int ub913_parse_dt(struct ub913_data *priv)
-{
- struct device_node *np = priv->client->dev.of_node;
- struct device *dev = &priv->client->dev;
- int ret;
-
- if (!np) {
- dev_err(dev, "OF: no device tree node!\n");
- return -ENOENT;
- }
-
- /* optional, if absent all GPIO pins are unused */
- ret = of_property_read_u32_array(np, "gpio-functions", priv->gpio_func,
- ARRAY_SIZE(priv->gpio_func));
- if (ret && ret != -EINVAL)
- dev_err(dev, "DT: invalid gpio-functions property (%d)", ret);
-
- return 0;
-}
-
static const struct regmap_config ub913_regmap_config = {
.name = "ds90ub913",
.reg_bits = 8,
@@ -290,7 +272,7 @@ static int _ub913_set_routing(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_krouting *routing)
{
- const struct v4l2_mbus_framefmt format = {
+ static const struct v4l2_mbus_framefmt format = {
.width = 640,
.height = 480,
.code = MEDIA_BUS_FMT_UYVY8_2X8,
@@ -361,9 +343,9 @@ static int ub913_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
struct v4l2_mbus_frame_desc source_fd;
struct v4l2_subdev_route *route;
struct v4l2_subdev_state *state;
- int ret = 0;
+ int ret;
- if (pad != 1) /* first tx pad */
+ if (pad != UB913_PAD_SOURCE)
return -EINVAL;
ret = ub913_get_source_frame_desc(priv, &source_fd);
@@ -379,16 +361,16 @@ static int ub913_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
fd->type = V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL;
for_each_active_route(routing, route) {
- unsigned int j;
+ unsigned int i;
if (route->source_pad != pad)
continue;
- for (j = 0; j < source_fd.num_entries; ++j)
- if (source_fd.entry[j].stream == route->sink_stream)
+ for (i = 0; i < source_fd.num_entries; ++i)
+ if (source_fd.entry[i].stream == route->sink_stream)
break;
- if (j == source_fd.num_entries) {
+ if (i == source_fd.num_entries) {
dev_err(&priv->client->dev,
"Failed to find stream from source frame desc\n");
ret = -EPIPE;
@@ -396,12 +378,10 @@ static int ub913_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
}
fd->entry[fd->num_entries].stream = route->source_stream;
-
- fd->entry[fd->num_entries].flags =
- V4L2_MBUS_FRAME_DESC_FL_LEN_MAX;
- fd->entry[fd->num_entries].length = source_fd.entry[j].length;
+ fd->entry[fd->num_entries].flags = source_fd.entry[i].flags;
+ fd->entry[fd->num_entries].length = source_fd.entry[i].length;
fd->entry[fd->num_entries].pixelcode =
- source_fd.entry[j].pixelcode;
+ source_fd.entry[i].pixelcode;
fd->num_entries++;
}
@@ -424,7 +404,7 @@ static int ub913_set_fmt(struct v4l2_subdev *sd,
return -EBUSY;
/* No transcoding, source and sink formats must match. */
- if (format->pad == 1)
+ if (format->pad == UB913_PAD_SOURCE)
return v4l2_subdev_get_fmt(sd, state, format);
/* Set sink format */
@@ -451,9 +431,9 @@ static int ub913_init_cfg(struct v4l2_subdev *sd,
{
struct v4l2_subdev_route routes[] = {
{
- .sink_pad = 0,
+ .sink_pad = UB913_PAD_SINK,
.sink_stream = 0,
- .source_pad = 1,
+ .source_pad = UB913_PAD_SOURCE,
.source_stream = 0,
.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
},
@@ -488,7 +468,7 @@ static int ub913_log_status(struct v4l2_subdev *sd)
/* clear CRC errors */
ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
- ub913_write(priv, UB913_REG_GENERAL_CFG, v | BIT(5));
+ ub913_write(priv, UB913_REG_GENERAL_CFG, v | UB913_REG_GENERAL_CFG_CRC_ERR_RESET);
ub913_write(priv, UB913_REG_GENERAL_CFG, v);
return 0;
@@ -526,8 +506,6 @@ static int ub913_notify_bound(struct v4l2_async_notifier *notifier,
unsigned int src_pad;
int ret;
- dev_dbg(dev, "Bind %s\n", source_subdev->name);
-
ret = media_entity_get_fwnode_pad(&source_subdev->entity,
source_subdev->fwnode,
MEDIA_PAD_FL_SOURCE);
@@ -541,7 +519,7 @@ static int ub913_notify_bound(struct v4l2_async_notifier *notifier,
src_pad = ret;
ret = media_create_pad_link(&source_subdev->entity, src_pad,
- &priv->sd.entity, 0,
+ &priv->sd.entity, UB913_PAD_SINK,
MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
if (ret) {
@@ -550,26 +528,11 @@ static int ub913_notify_bound(struct v4l2_async_notifier *notifier,
return ret;
}
- dev_dbg(dev, "Bound %s:%u\n", source_subdev->name, src_pad);
-
- dev_dbg(dev, "All subdevs bound\n");
-
return 0;
}
-static void ub913_notify_unbind(struct v4l2_async_notifier *notifier,
- struct v4l2_subdev *source_subdev,
- struct v4l2_async_subdev *asd)
-{
- struct ub913_data *priv = sd_to_ub913(notifier->sd);
- struct device *dev = &priv->client->dev;
-
- dev_dbg(dev, "Unbind %s\n", source_subdev->name);
-}
-
static const struct v4l2_async_notifier_operations ub913_notify_ops = {
.bound = ub913_notify_bound,
- .unbind = ub913_notify_unbind,
};
static int ub913_v4l2_notifier_register(struct ub913_data *priv)
@@ -579,8 +542,6 @@ static int ub913_v4l2_notifier_register(struct ub913_data *priv)
struct device_node *ep_node;
int ret;
- dev_dbg(dev, "register async notif\n");
-
ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
if (!ep_node) {
dev_err(dev, "No graph endpoint\n");
@@ -615,10 +576,6 @@ static int ub913_v4l2_notifier_register(struct ub913_data *priv)
static void ub913_v4l2_nf_unregister(struct ub913_data *priv)
{
- struct device *dev = &priv->client->dev;
-
- dev_dbg(dev, "Unregister async notif\n");
-
v4l2_async_nf_unregister(&priv->notifier);
v4l2_async_nf_cleanup(&priv->notifier);
}
@@ -691,16 +648,37 @@ static int ub913_add_i2c_adapter(struct ub913_data *priv)
if (ret)
return ret;
- priv->has_i2c_adapter = true;
-
return 0;
}
-static void ub913_remove_i2c_adapter(struct ub913_data *priv)
+static int ub913_parse_dt(struct ub913_data *priv)
{
- if (priv->has_i2c_adapter)
- i2c_atr_del_adapter(priv->plat_data->atr,
- priv->plat_data->port);
+ struct device_node *np = priv->client->dev.of_node;
+ struct device *dev = &priv->client->dev;
+ int ret;
+ struct device_node *ep_np;
+
+ if (!np) {
+ dev_err(dev, "OF: no device tree node!\n");
+ return -ENOENT;
+ }
+
+ ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
+ if (!ep_np) {
+ dev_err(dev, "OF: no endpoint\n");
+ return -ENOENT;
+ }
+
+ ret = of_property_read_u32(ep_np, "pclk-sample", &priv->pclk_polarity);
+
+ of_node_put(ep_np);
+
+ if (ret) {
+ dev_err(dev, "OF: failed to parse pclk-sample: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
}
static int ub913_probe(struct i2c_client *client)
@@ -712,8 +690,6 @@ static int ub913_probe(struct i2c_client *client)
bool mode_override;
u8 mode;
- dev_dbg(dev, "probing, addr 0x%02x\n", client->addr);
-
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
@@ -749,12 +725,12 @@ static int ub913_probe(struct i2c_client *client)
if (ret)
return ret;
- if (!(v & BIT(4))) {
+ if (!(v & UB913_REG_MODE_SEL_MODE_UP_TO_DATE)) {
dev_err(dev, "Mode value not stabilized\n");
return -ENODEV;
}
- mode_override = v & BIT(5);
+ mode_override = v & UB913_REG_MODE_SEL_MODE_OVERRIDE;
mode = v & 0xf;
dev_dbg(dev, "mode from %s: %#x\n",
@@ -778,6 +754,11 @@ static int ub913_probe(struct i2c_client *client)
goto err_gpiochip_remove;
}
+ ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
+ v &= ~UB913_REG_GENERAL_CFG_PCLK_RISING;
+ v |= priv->pclk_polarity ? UB913_REG_GENERAL_CFG_PCLK_RISING : 0;
+ ub913_write(priv, UB913_REG_GENERAL_CFG, v);
+
v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub913_subdev_ops);
priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
@@ -818,8 +799,6 @@ static int ub913_probe(struct i2c_client *client)
goto err_unreg_async_subdev;
}
- dev_dbg(dev, "Successfully probed\n");
-
return 0;
err_unreg_async_subdev:
@@ -844,9 +823,8 @@ static void ub913_remove(struct i2c_client *client)
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ub913_data *priv = sd_to_ub913(sd);
- dev_dbg(&client->dev, "Removing\n");
-
- ub913_remove_i2c_adapter(priv);
+ i2c_atr_del_adapter(priv->plat_data->atr,
+ priv->plat_data->port);
v4l2_async_unregister_subdev(&priv->sd);
@@ -890,3 +868,4 @@ MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Texas Instruments DS90UB913 serializer driver");
MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
+MODULE_IMPORT_NS(I2C_ATR);
diff --git a/drivers/media/i2c/ds90ub953.c b/drivers/media/i2c/ds90ub953.c
index c7f5d08e07ef..251dc8e8adfa 100644
--- a/drivers/media/i2c/ds90ub953.c
+++ b/drivers/media/i2c/ds90ub953.c
@@ -38,7 +38,16 @@
#define UB953_REG_RESET_CTL_DIGITAL_RESET_0 BIT(0)
#define UB953_REG_GENERAL_CFG 0x02
+#define UB953_REG_GENERAL_CFG_CONT_CLK BIT(6)
+#define UB953_REG_GENERAL_CFG_CSI_LANE_SEL_SHIFT 4
+#define UB953_REG_GENERAL_CFG_CSI_LANE_SEL_MASK GENMASK(5, 4)
+#define UB953_REG_GENERAL_CFG_CRC_TX_GEN_ENABLE BIT(1)
+#define UB953_REG_GENERAL_CFG_I2C_STRAP_MODE BIT(0)
+
#define UB953_REG_MODE_SEL 0x03
+#define UB953_REG_MODE_SEL_MODE_DONE BIT(3)
+#define UB953_REG_MODE_SEL_MODE_OVERRIDE BIT(4)
+#define UB953_REG_MODE_SEL_MODE_MASK GENMASK(2, 0)
#define UB953_REG_CLKOUT_CTRL0 0x06
#define UB953_REG_CLKOUT_CTRL1 0x07
@@ -105,13 +114,13 @@
/* Note: Only sync mode supported for now */
enum ub953_mode {
- /* FPD-Link 3 CSI-2 synchronous mode */
+ /* FPD-Link III CSI-2 synchronous mode */
UB953_MODE_SYNC,
- /* FPD-Link 3 CSI-2 non-synchronous mode, external ref clock */
+ /* FPD-Link III CSI-2 non-synchronous mode, external ref clock */
UB953_MODE_NONSYNC_EXT,
- /* FPD-Link 3 CSI-2 non-synchronous mode, internal ref clock */
+ /* FPD-Link III CSI-2 non-synchronous mode, internal ref clock */
UB953_MODE_NONSYNC_INT,
- /* FPD-Link 3 DVP mode */
+ /* FPD-Link III DVP mode */
UB953_MODE_DVP,
};
@@ -154,9 +163,6 @@ struct ub953_data {
enum ub953_mode mode;
struct ds90ub9xx_platform_data *plat_data;
-
- /* Have we succefully called i2c_atr_add_adapter() */
- bool has_i2c_adapter;
};
static inline struct ub953_data *sd_to_ub953(struct v4l2_subdev *sd)
@@ -439,10 +445,10 @@ static int _ub953_set_routing(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_krouting *routing)
{
- const struct v4l2_mbus_framefmt format = {
+ static const struct v4l2_mbus_framefmt format = {
.width = 640,
.height = 480,
- .code = MEDIA_BUS_FMT_UYVY8_2X8,
+ .code = MEDIA_BUS_FMT_UYVY8_1X16,
.field = V4L2_FIELD_NONE,
.colorspace = V4L2_COLORSPACE_SRGB,
.ycbcr_enc = V4L2_YCBCR_ENC_601,
@@ -510,9 +516,9 @@ static int ub953_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
struct v4l2_mbus_frame_desc source_fd;
struct v4l2_subdev_route *route;
struct v4l2_subdev_state *state;
- int ret = 0;
+ int ret;
- if (pad != 1) /* first tx pad */
+ if (pad != UB953_PAD_SOURCE)
return -EINVAL;
ret = ub953_get_source_frame_desc(priv, &source_fd);
@@ -529,14 +535,14 @@ static int ub953_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
for_each_active_route(routing, route) {
struct v4l2_mbus_frame_desc_entry *source_entry = NULL;
- unsigned int j;
+ unsigned int i;
if (route->source_pad != pad)
continue;
- for (j = 0; j < source_fd.num_entries; ++j)
- if (source_fd.entry[j].stream == route->sink_stream) {
- source_entry = &source_fd.entry[j];
+ for (i = 0; i < source_fd.num_entries; ++i)
+ if (source_fd.entry[i].stream == route->sink_stream) {
+ source_entry = &source_fd.entry[i];
break;
}
@@ -548,9 +554,7 @@ static int ub953_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
}
fd->entry[fd->num_entries].stream = route->source_stream;
-
- fd->entry[fd->num_entries].flags =
- V4L2_MBUS_FRAME_DESC_FL_LEN_MAX;
+ fd->entry[fd->num_entries].flags = source_entry->flags;
fd->entry[fd->num_entries].length = source_entry->length;
fd->entry[fd->num_entries].pixelcode = source_entry->pixelcode;
fd->entry[fd->num_entries].bus.csi2.vc =
@@ -579,7 +583,7 @@ static int ub953_set_fmt(struct v4l2_subdev *sd,
return -EBUSY;
/* No transcoding, source and sink formats must match. */
- if (format->pad == 1)
+ if (format->pad == UB953_PAD_SOURCE)
return v4l2_subdev_get_fmt(sd, state, format);
/* Set sink format */
@@ -606,9 +610,9 @@ static int ub953_init_cfg(struct v4l2_subdev *sd,
{
struct v4l2_subdev_route routes[] = {
{
- .sink_pad = 0,
+ .sink_pad = UB953_PAD_SINK,
.sink_stream = 0,
- .source_pad = 1,
+ .source_pad = UB953_PAD_SOURCE,
.source_stream = 0,
.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
},
@@ -784,7 +788,7 @@ static const char *const ub953_tpg_qmenu[] = {
"8 vertical color bars",
};
-static void ub953_enable_tpg(struct ub953_data *priv, int tpg_num)
+static int ub953_enable_tpg(struct ub953_data *priv, int tpg_num)
{
struct v4l2_subdev *sd = &priv->sd;
struct v4l2_subdev_state *state;
@@ -812,7 +816,15 @@ static void ub953_enable_tpg(struct ub953_data *priv, int tpg_num)
state = v4l2_subdev_get_locked_active_state(sd);
+ if (state->routing.num_routes != 1)
+ return -EINVAL;
+
fmt = v4l2_subdev_state_get_stream_format(state, UB953_PAD_SOURCE, 0);
+ if (!fmt)
+ return -EINVAL;
+
+ if (fmt->code != MEDIA_BUS_FMT_UYVY8_1X16)
+ return -EINVAL;
width = fmt->width;
height = fmt->height;
@@ -846,6 +858,8 @@ static void ub953_enable_tpg(struct ub953_data *priv, int tpg_num)
vbp);
ub953_write_ind(priv, UB953_IND_TARGET_PAT_GEN, UB953_IND_PGEN_VFP,
vfp);
+
+ return 0;
}
static void ub953_disable_tpg(struct ub953_data *priv)
@@ -858,17 +872,18 @@ static int ub953_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ub953_data *priv =
container_of(ctrl->handler, struct ub953_data, ctrl_handler);
+ int ret = 0;
switch (ctrl->id) {
case V4L2_CID_TEST_PATTERN:
if (ctrl->val == 0)
ub953_disable_tpg(priv);
else
- ub953_enable_tpg(priv, ctrl->val);
+ ret = ub953_enable_tpg(priv, ctrl->val);
break;
}
- return 0;
+ return ret;
}
static const struct v4l2_ctrl_ops ub953_ctrl_ops = {
@@ -884,8 +899,6 @@ static int ub953_notify_bound(struct v4l2_async_notifier *notifier,
unsigned int src_pad;
int ret;
- dev_dbg(dev, "Bind %s\n", source_subdev->name);
-
ret = media_entity_get_fwnode_pad(&source_subdev->entity,
source_subdev->fwnode,
MEDIA_PAD_FL_SOURCE);
@@ -907,26 +920,11 @@ static int ub953_notify_bound(struct v4l2_async_notifier *notifier,
return ret;
}
- dev_dbg(dev, "Bound %s:%u\n", source_subdev->name, src_pad);
-
- dev_dbg(dev, "All subdevs bound\n");
-
return 0;
}
-static void ub953_notify_unbind(struct v4l2_async_notifier *notifier,
- struct v4l2_subdev *source_subdev,
- struct v4l2_async_subdev *asd)
-{
- struct ub953_data *priv = sd_to_ub953(notifier->sd);
- struct device *dev = &priv->client->dev;
-
- dev_dbg(dev, "Unbind %s\n", source_subdev->name);
-}
-
static const struct v4l2_async_notifier_operations ub953_notify_ops = {
.bound = ub953_notify_bound,
- .unbind = ub953_notify_unbind,
};
static int ub953_v4l2_notifier_register(struct ub953_data *priv)
@@ -936,8 +934,6 @@ static int ub953_v4l2_notifier_register(struct ub953_data *priv)
struct device_node *ep_node;
int ret;
- dev_dbg(dev, "register async notif\n");
-
ep_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
if (!ep_node) {
dev_err(dev, "No graph endpoint\n");
@@ -972,10 +968,6 @@ static int ub953_v4l2_notifier_register(struct ub953_data *priv)
static void ub953_v4l2_notifier_unregister(struct ub953_data *priv)
{
- struct device *dev = &priv->client->dev;
-
- dev_dbg(dev, "Unregister async notif\n");
-
v4l2_async_nf_unregister(&priv->notifier);
v4l2_async_nf_cleanup(&priv->notifier);
}
@@ -1006,48 +998,6 @@ static int ub953_i2c_master_init(struct ub953_data *priv)
return 0;
}
-static int ub953_parse_dt(struct ub953_data *priv)
-{
- struct device_node *np = priv->client->dev.of_node;
- struct device *dev = &priv->client->dev;
- struct device_node *ep_np;
- int ret;
-
- if (!np) {
- dev_err(dev, "OF: no device tree node!\n");
- return -ENOENT;
- }
-
- ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
- if (!ep_np) {
- dev_err(dev, "OF: no endpoint\n");
- return -ENOENT;
- }
-
- ret = of_property_count_u32_elems(ep_np, "data-lanes");
- if (ret <= 0) {
- dev_err(dev, "OF: failed to parse data-lanes: %d\n", ret);
- return ret;
- }
-
- if (ret != 1 && ret != 2 && ret != 4) {
- dev_err(dev, "OF: bad number of data-lanes: %d\n", ret);
- return -EINVAL;
- }
-
- priv->num_data_lanes = ret;
-
- return 0;
-}
-
-static const struct regmap_config ub953_regmap_config = {
- .name = "ds90ub953",
- .reg_bits = 8,
- .val_bits = 8,
- .reg_format_endian = REGMAP_ENDIAN_DEFAULT,
- .val_format_endian = REGMAP_ENDIAN_DEFAULT,
-};
-
static u64 ub953_get_fc_rate(struct ub953_data *priv)
{
if (priv->hw_data->ub971) {
@@ -1322,16 +1272,52 @@ static int ub953_add_i2c_adapter(struct ub953_data *priv)
if (ret)
return ret;
- priv->has_i2c_adapter = true;
-
return 0;
}
-static void ub953_remove_i2c_adapter(struct ub953_data *priv)
+static const struct regmap_config ub953_regmap_config = {
+ .name = "ds90ub953",
+ .reg_bits = 8,
+ .val_bits = 8,
+ .reg_format_endian = REGMAP_ENDIAN_DEFAULT,
+ .val_format_endian = REGMAP_ENDIAN_DEFAULT,
+};
+
+static int ub953_parse_dt(struct ub953_data *priv)
{
- if (priv->has_i2c_adapter)
- i2c_atr_del_adapter(priv->plat_data->atr,
- priv->plat_data->port);
+ struct device_node *np = priv->client->dev.of_node;
+ struct device *dev = &priv->client->dev;
+ struct device_node *ep_np;
+ int ret;
+
+ if (!np) {
+ dev_err(dev, "OF: no device tree node!\n");
+ return -ENOENT;
+ }
+
+ ep_np = of_graph_get_endpoint_by_regs(np, 0, 0);
+ if (!ep_np) {
+ dev_err(dev, "OF: no endpoint\n");
+ return -ENOENT;
+ }
+
+ ret = of_property_count_u32_elems(ep_np, "data-lanes");
+
+ of_node_put(ep_np);
+
+ if (ret <= 0) {
+ dev_err(dev, "OF: failed to parse data-lanes: %d\n", ret);
+ return ret;
+ }
+
+ if (ret != 1 && ret != 2 && ret != 4) {
+ dev_err(dev, "OF: bad number of data-lanes: %d\n", ret);
+ return -EINVAL;
+ }
+
+ priv->num_data_lanes = ret;
+
+ return 0;
}
static int ub953_probe(struct i2c_client *client)
@@ -1342,8 +1328,6 @@ static int ub953_probe(struct i2c_client *client)
u8 v;
bool mode_override;
- dev_dbg(dev, "probing, addr 0x%02x\n", client->addr);
-
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
@@ -1383,15 +1367,15 @@ static int ub953_probe(struct i2c_client *client)
if (ret)
goto err_mutex_destroy;
- if (!(v & BIT(3))) {
+ if (!(v & UB953_REG_MODE_SEL_MODE_DONE)) {
dev_err(dev, "Mode value not stabilized\n");
ret = -ENODEV;
goto err_mutex_destroy;
}
- mode_override = v & BIT(4);
+ mode_override = v & UB953_REG_MODE_SEL_MODE_OVERRIDE;
- switch (v & 0x7) {
+ switch (v & UB953_REG_MODE_SEL_MODE_MASK) {
case 0:
priv->mode = UB953_MODE_SYNC;
break;
@@ -1431,7 +1415,8 @@ static int ub953_probe(struct i2c_client *client)
if (ret)
goto err_mutex_destroy;
- dev_dbg(dev, "i2c strap setting %s V\n", (v & 1) ? "1.8" : "3.3");
+ dev_dbg(dev, "i2c strap setting %s V\n",
+ (v & UB953_REG_GENERAL_CFG_I2C_STRAP_MODE) ? "1.8" : "3.3");
ret = ub953_i2c_master_init(priv);
if (ret) {
@@ -1446,9 +1431,9 @@ static int ub953_probe(struct i2c_client *client)
}
ub953_write(priv, UB953_REG_GENERAL_CFG,
- (1 << 6) | /* continuous clk */
- ((priv->num_data_lanes - 1) << 4) |
- (1 << 1)); /* CRC TX gen */
+ UB953_REG_GENERAL_CFG_CONT_CLK |
+ ((priv->num_data_lanes - 1) << UB953_REG_GENERAL_CFG_CSI_LANE_SEL_SHIFT) |
+ UB953_REG_GENERAL_CFG_CRC_TX_GEN_ENABLE);
ret = ub953_register_clkout(priv);
if (ret) {
@@ -1513,8 +1498,6 @@ static int ub953_probe(struct i2c_client *client)
goto err_unreg_async_subdev;
}
- dev_dbg(dev, "Successfully probed\n");
-
return 0;
err_unreg_async_subdev:
@@ -1543,9 +1526,8 @@ static void ub953_remove(struct i2c_client *client)
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ub953_data *priv = sd_to_ub953(sd);
- dev_dbg(&client->dev, "Removing\n");
-
- ub953_remove_i2c_adapter(priv);
+ i2c_atr_del_adapter(priv->plat_data->atr,
+ priv->plat_data->port);
v4l2_async_unregister_subdev(&priv->sd);
@@ -1605,3 +1587,4 @@ MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Texas Instruments DS90UB953 serializer driver");
MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
+MODULE_IMPORT_NS(I2C_ATR);
diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c
index fef704ee5529..b532a93f3da7 100644
--- a/drivers/media/i2c/ds90ub960.c
+++ b/drivers/media/i2c/ds90ub960.c
@@ -65,6 +65,10 @@
#define UB960_SR_I2C_DEV_ID 0x00
#define UB960_SR_RESET 0x01
+#define UB960_SR_RESET_DIGITAL_RESET1 BIT(1)
+#define UB960_SR_RESET_DIGITAL_RESET0 BIT(0)
+#define UB960_SR_RESET_GPIO_LOCK_RELEASE BIT(5)
+
#define UB960_SR_GEN_CONFIG 0x02
#define UB960_SR_REV_MASK 0x03
#define UB960_SR_DEVICE_STS 0x04
@@ -80,6 +84,10 @@
#define UB960_SR_GPIO_PIN_STS 0x0E
#define UB960_SR_GPIO_INPUT_CTL 0x0F
#define UB960_SR_GPIO_PIN_CTL(n) (0x10 + (n)) /* n < UB960_NUM_GPIOS */
+#define UB960_SR_GPIO_PIN_CTL_GPIO_OUT_SEL 5
+#define UB960_SR_GPIO_PIN_CTL_GPIO_OUT_SRC_SHIFT 2
+#define UB960_SR_GPIO_PIN_CTL_GPIO_OUT_EN BIT(0)
+
#define UB960_SR_FS_CTL 0x18
#define UB960_SR_FS_HIGH_TIME_1 0x19
#define UB960_SR_FS_HIGH_TIME_0 0x1A
@@ -135,7 +143,13 @@
#define UB960_TR_CSI_TEST_PATT_LO 0x3A
#define UB960_XR_SFILTER_CFG 0x41
+#define UB960_XR_SFILTER_CFG_SFILTER_MAX_SHIFT 4
+#define UB960_XR_SFILTER_CFG_SFILTER_MIN_SHIFT 0
+
#define UB960_XR_AEQ_CTL1 0x42
+#define UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_SHIFT 4
+#define UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN BIT(0)
+
#define UB960_XR_AEQ_ERR_THOLD 0x43
#define UB960_RR_BCC_ERR_CTL 0x46
@@ -213,6 +227,9 @@
#define UB960_RR_CSI_ERR_COUNTER 0x7B
#define UB960_RR_PORT_CONFIG2 0x7C
+#define UB960_RR_PORT_CONFIG2_LV_POL_LOW BIT(1)
+#define UB960_RR_PORT_CONFIG2_FV_POL_LOW BIT(0)
+
#define UB960_RR_PORT_PASS_CTL 0x7D
#define UB960_RR_SEN_INT_RISE_CTL 0x7E
#define UB960_RR_SEN_INT_FALL_CTL 0x7F
@@ -247,9 +264,21 @@
#define UB960_RR_PORT_DEBUG 0xD0
#define UB960_RR_AEQ_CTL2 0xD2
+#define UB960_RR_AEQ_CTL2_SET_AEQ_FLOOR BIT(2)
+
#define UB960_RR_AEQ_STATUS 0xD3
+
#define UB960_RR_AEQ_BYPASS 0xD4
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_SHIFT 5
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_MASK GENMASK(7, 5)
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_SHIFT 1
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_MASK GENMASK(3, 1)
+#define UB960_RR_AEQ_BYPASS_ENABLE BIT(0)
+
#define UB960_RR_AEQ_MIN_MAX 0xD5
+#define UB960_RR_AEQ_MIN_MAX_AEQ_MAX_SHIFT 4
+#define UB960_RR_AEQ_MIN_MAX_AEQ_FLOOR_SHIFT 0
+
#define UB960_RR_SFILTER_STS_0 0xD6
#define UB960_RR_SFILTER_STS_1 0xD7
#define UB960_RR_PORT_ICR_HI 0xD8
@@ -295,7 +324,12 @@
#define UB960_IR_PGEN_COLOR(n) (0x10 + (n)) /* n < 15 */
#define UB960_IR_RX_ANA_STROBE_SET_CLK 0x08
+#define UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY BIT(3)
+#define UB960_IR_RX_ANA_STROBE_SET_CLK_DELAY_MASK GENMASK(2, 0)
+
#define UB960_IR_RX_ANA_STROBE_SET_DATA 0x09
+#define UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY BIT(3)
+#define UB960_IR_RX_ANA_STROBE_SET_DATA_DELAY_MASK GENMASK(2, 0)
/* EQ related */
@@ -347,6 +381,8 @@ struct ub960_rxport {
struct i2c_client *ser_client; /* Serializer */
unsigned short ser_alias; /* Serializer i2c alias (lower 7 bits) */
+ u8 lv_fv_pol; /* LV and FV polarities */
+
struct regulator *vpoc;
/* EQ settings */
@@ -905,7 +941,7 @@ static int ub960_atr_attach_client(struct i2c_atr *atr, u32 chan_id,
const struct i2c_client *client,
u16 *alias_id)
{
- struct ub960_data *priv = i2c_atr_get_clientdata(atr);
+ struct ub960_data *priv = i2c_atr_get_driver_data(atr);
struct ub960_rxport *rxport = priv->rxports[chan_id];
struct device *dev = &priv->client->dev;
struct atr_alias_table_entry *entry = NULL;
@@ -978,7 +1014,7 @@ static int ub960_atr_attach_client(struct i2c_atr *atr, u32 chan_id,
static void ub960_atr_detach_client(struct i2c_atr *atr, u32 chan_id,
const struct i2c_client *client)
{
- struct ub960_data *priv = i2c_atr_get_clientdata(atr);
+ struct ub960_data *priv = i2c_atr_get_driver_data(atr);
struct ub960_rxport *rxport = priv->rxports[chan_id];
struct device *dev = &priv->client->dev;
struct atr_alias_table_entry *entry;
@@ -1134,6 +1170,51 @@ static void ub960_csi_handle_events(struct ub960_data *priv, u8 nport)
* RX ports
*/
+static int ub960_rxport_enable_vpocs(struct ub960_data *priv)
+{
+ unsigned int nport;
+ int ret;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport || !rxport->vpoc)
+ continue;
+
+ ret = regulator_enable(rxport->vpoc);
+ if (ret)
+ goto err_disable_vpocs;
+ }
+
+ return 0;
+
+err_disable_vpocs:
+ for (; nport > 0; --nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport - 1];
+
+ if (!rxport || !rxport->vpoc)
+ continue;
+
+ regulator_disable(rxport->vpoc);
+ }
+
+ return ret;
+}
+
+static void ub960_rxport_disable_vpocs(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; ++nport) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport || !rxport->vpoc)
+ continue;
+
+ regulator_disable(rxport->vpoc);
+ }
+}
+
static void ub960_rxport_clear_errors(struct ub960_data *priv,
unsigned int nport)
{
@@ -1168,24 +1249,24 @@ static int ub960_rxport_get_strobe_pos(struct ub960_data *priv,
ub960_read_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
UB960_IR_RX_ANA_STROBE_SET_CLK, &v);
- clk_delay = v & BIT(3) ? 0 : 6;
+ clk_delay = v & UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY ? 0 : 6;
ub960_read_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
UB960_IR_RX_ANA_STROBE_SET_DATA, &v);
- data_delay = v & BIT(3) ? 0 : 6;
+ data_delay = v & UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY ? 0 : 6;
ret = ub960_rxport_read(priv, nport, UB960_RR_SFILTER_STS_0, &v);
if (ret)
return ret;
- clk_delay += v & 0x7;
+ clk_delay += v & UB960_IR_RX_ANA_STROBE_SET_CLK_DELAY_MASK;
ub960_rxport_read(priv, nport, UB960_RR_SFILTER_STS_1, &v);
if (ret)
return ret;
- data_delay += v & 0x7;
+ data_delay += v & UB960_IR_RX_ANA_STROBE_SET_DATA_DELAY_MASK;
*strobe_pos = data_delay - clk_delay;
@@ -1201,17 +1282,17 @@ static void ub960_rxport_set_strobe_pos(struct ub960_data *priv,
strobe_pos > UB960_MAX_MANUAL_STROBE_POS))
return;
- clk_delay = BIT(3);
- data_delay = BIT(3);
+ clk_delay = UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY;
+ data_delay = UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY;
if (strobe_pos < -7)
clk_delay = abs(strobe_pos) - 6;
else if (strobe_pos > 7)
data_delay = strobe_pos - 6;
else if (strobe_pos < 0)
- clk_delay = abs(strobe_pos) | BIT(3);
+ clk_delay = abs(strobe_pos) | UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY;
else if (strobe_pos > 0)
- data_delay = strobe_pos | BIT(3);
+ data_delay = strobe_pos | UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY;
ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
UB960_IR_RX_ANA_STROBE_SET_CLK, clk_delay);
@@ -1230,7 +1311,8 @@ static void ub960_rxport_set_strobe_range(struct ub960_data *priv,
strobe_max += 7;
ub960_write(priv, UB960_XR_SFILTER_CFG,
- (u8)strobe_min | ((u8)strobe_max << 4));
+ ((u8)strobe_min << UB960_XR_SFILTER_CFG_SFILTER_MIN_SHIFT) |
+ ((u8)strobe_max << UB960_XR_SFILTER_CFG_SFILTER_MAX_SHIFT));
}
static int ub960_rxport_get_eq_level(struct ub960_data *priv,
@@ -1267,10 +1349,11 @@ static void ub960_rxport_set_eq_level(struct ub960_data *priv,
ub960_rxport_read(priv, nport, UB960_RR_AEQ_BYPASS, &v);
- v &= ~((0x7 << 5) | (0x7 << 1));
- v |= eq_stage_1_select_value << 5;
- v |= eq_stage_2_select_value << 1;
- v |= BIT(0); /* Enable AEQ Bypass */
+ v &= ~(UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_MASK |
+ UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_MASK);
+ v |= eq_stage_1_select_value << UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_SHIFT;
+ v |= eq_stage_2_select_value << UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_SHIFT;
+ v |= UB960_RR_AEQ_BYPASS_ENABLE; /* Enable AEQ Bypass */
ub960_rxport_write(priv, nport, UB960_RR_AEQ_BYPASS, v);
}
@@ -1279,11 +1362,13 @@ static void ub960_rxport_set_eq_range(struct ub960_data *priv,
unsigned int nport, u8 eq_min, u8 eq_max)
{
ub960_rxport_write(priv, nport, UB960_RR_AEQ_MIN_MAX,
- eq_min | (eq_max << 4));
+ (eq_min << UB960_RR_AEQ_MIN_MAX_AEQ_FLOOR_SHIFT) |
+ (eq_max << UB960_RR_AEQ_MIN_MAX_AEQ_MAX_SHIFT));
/* Enable AEQ min setting */
- ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_CTL2, BIT(2),
- BIT(2));
+ ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_CTL2,
+ UB960_RR_AEQ_CTL2_SET_AEQ_FLOOR,
+ UB960_RR_AEQ_CTL2_SET_AEQ_FLOOR);
}
static void ub960_rxport_config_eq(struct ub960_data *priv, unsigned int nport)
@@ -1294,10 +1379,13 @@ static void ub960_rxport_config_eq(struct ub960_data *priv, unsigned int nport)
if (priv->strobe.manual) {
/* Disable AEQ_SFILTER_EN */
- ub960_update_bits(priv, UB960_XR_AEQ_CTL1, BIT(0), 0);
+ ub960_update_bits(priv, UB960_XR_AEQ_CTL1,
+ UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN, 0);
} else {
/* Enable SFILTER and error control */
- ub960_write(priv, UB960_XR_AEQ_CTL1, (0x7 << 4) | BIT(0));
+ ub960_write(priv, UB960_XR_AEQ_CTL1,
+ (0x7 << UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_SHIFT) |
+ UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN);
/* Set AEQ strobe range */
ub960_rxport_set_strobe_range(priv, priv->strobe.min,
@@ -1317,7 +1405,8 @@ static void ub960_rxport_config_eq(struct ub960_data *priv, unsigned int nport)
/* Enable AEQ Bypass */
ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_BYPASS,
- BIT(0), BIT(0));
+ UB960_RR_AEQ_BYPASS_ENABLE,
+ UB960_RR_AEQ_BYPASS_ENABLE);
} else {
ub960_rxport_set_eq_range(priv, nport,
rxport->eq.aeq.eq_level_min,
@@ -1325,7 +1414,7 @@ static void ub960_rxport_config_eq(struct ub960_data *priv, unsigned int nport)
/* Disable AEQ Bypass */
ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_BYPASS,
- BIT(0), 0);
+ UB960_RR_AEQ_BYPASS_ENABLE, 0);
}
}
@@ -1492,7 +1581,7 @@ static int ub960_init_atr(struct ub960_data *priv)
if (IS_ERR(priv->atr))
return PTR_ERR(priv->atr);
- i2c_atr_set_clientdata(priv->atr, priv);
+ i2c_atr_set_driver_data(priv->atr, priv);
return 0;
}
@@ -1800,7 +1889,8 @@ static void ub960_init_rx_port_ub960(struct ub960_data *priv,
}
/* LV_POLARITY & FV_POLARITY */
- ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2, 0x3, 0x1);
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2, 0x3,
+ rxport->lv_fv_pol);
/* Enable all interrupt sources from this port */
ub960_rxport_write(priv, nport, UB960_RR_PORT_ICR_HI, 0x07);
@@ -2758,8 +2848,6 @@ static int ub960_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
struct device *dev = &priv->client->dev;
u8 vc_map[UB960_MAX_RX_NPORTS] = { 0 };
- dev_dbg(dev, "%s for pad %d\n", __func__, pad);
-
if (!ub960_pad_is_source(priv, pad))
return -EINVAL;
@@ -2805,9 +2893,7 @@ static int ub960_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
}
fd->entry[fd->num_entries].stream = route->source_stream;
-
- fd->entry[fd->num_entries].flags =
- V4L2_MBUS_FRAME_DESC_FL_LEN_MAX;
+ fd->entry[fd->num_entries].flags = source_entry->flags;
fd->entry[fd->num_entries].length = source_entry->length;
fd->entry[fd->num_entries].pixelcode = source_entry->pixelcode;
@@ -3015,13 +3101,15 @@ static int ub960_log_status(struct v4l2_subdev *sd)
ub960_read(priv, UB960_XR_AEQ_CTL1, &v);
dev_info(dev, "\t%s strobe\n",
- (v & BIT(0)) ? "Adaptive" : "Manual");
+ (v & UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN) ? "Adaptive" :
+ "Manual");
- if (v & BIT(0)) {
+ if (v & UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN) {
ub960_read(priv, UB960_XR_SFILTER_CFG, &v);
dev_info(dev, "\tStrobe range [%d, %d]\n",
- (v & 0xf) - 7, ((v >> 4) & 0xf) - 7);
+ ((v >> UB960_XR_SFILTER_CFG_SFILTER_MIN_SHIFT) & 0xf) - 7,
+ ((v >> UB960_XR_SFILTER_CFG_SFILTER_MAX_SHIFT) & 0xf) - 7);
}
ub960_rxport_get_strobe_pos(priv, nport, &strobe_pos);
@@ -3033,14 +3121,15 @@ static int ub960_log_status(struct v4l2_subdev *sd)
ub960_rxport_read(priv, nport, UB960_RR_AEQ_BYPASS, &v);
dev_info(dev, "\t%s EQ\n",
- (v & BIT(0)) ? "Manual" : "Adaptive");
+ (v & UB960_RR_AEQ_BYPASS_ENABLE) ? "Manual" :
+ "Adaptive");
- if (!(v & BIT(0))) {
- ub960_rxport_read(priv, nport, UB960_RR_AEQ_MIN_MAX,
- &v);
+ if (!(v & UB960_RR_AEQ_BYPASS_ENABLE)) {
+ ub960_rxport_read(priv, nport, UB960_RR_AEQ_MIN_MAX, &v);
- dev_info(dev, "\tEQ range [%u, %u]\n", v & 0xf,
- (v >> 4) & 0xf);
+ dev_info(dev, "\tEQ range [%u, %u]\n",
+ (v >> UB960_RR_AEQ_MIN_MAX_AEQ_FLOOR_SHIFT) & 0xf,
+ (v >> UB960_RR_AEQ_MIN_MAX_AEQ_MAX_SHIFT) & 0xf);
}
ub960_rxport_get_eq_level(priv, nport, &eq_level);
@@ -3270,9 +3359,6 @@ static void ub960_rxport_free_ports(struct ub960_data *priv)
if (!rxport)
continue;
- if (rxport->vpoc)
- regulator_disable(rxport->vpoc);
-
fwnode_handle_put(rxport->fwnode);
of_node_put(rxport->remote_of_node);
@@ -3416,6 +3502,51 @@ static int ub960_parse_dt_rxport_link_properties(struct ub960_data *priv,
return 0;
}
+static int ub960_parse_dt_rxport_ep_properties(struct ub960_data *priv, struct ub960_rxport *rxport)
+{
+ struct device *dev = &priv->client->dev;
+ struct device_node *ep_np;
+ int ret;
+ u32 v;
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ break;
+ default:
+ return 0;
+ }
+
+ ep_np = of_graph_get_endpoint_by_regs(priv->client->dev.of_node,
+ rxport->nport, 0);
+ if (!ep_np)
+ return -EINVAL;
+
+ ret = of_property_read_u32(ep_np, "hsync-active", &v);
+ if (ret) {
+ dev_err(dev, "Failed to parse 'hsync-active' for port %u: %d\n",
+ rxport->nport, ret);
+ goto err;
+ }
+
+ rxport->lv_fv_pol |= v ? UB960_RR_PORT_CONFIG2_LV_POL_LOW : 0;
+
+ ret = of_property_read_u32(ep_np, "vsync-active", &v);
+ if (ret) {
+ dev_err(dev, "Failed to parse 'vsync-active' for port %u: %d\n",
+ rxport->nport, ret);
+ goto err;
+ }
+
+ rxport->lv_fv_pol |= v ? UB960_RR_PORT_CONFIG2_FV_POL_LOW : 0;
+
+ return 0;
+err:
+ of_node_put(ep_np);
+ return ret;
+}
+
static int ub960_parse_dt_rxport(struct ub960_data *priv,
struct device_node *np)
{
@@ -3501,16 +3632,13 @@ static int ub960_parse_dt_rxport(struct ub960_data *priv,
rxport->fwnode = remote_ep_node;
- // XXX enable somewhere else?
- if (rxport->vpoc) {
- ret = regulator_enable(rxport->vpoc);
- if (ret)
- goto err_ep_node_put;
- }
+ ret = ub960_parse_dt_rxport_ep_properties(priv, rxport);
+ if (ret)
+ goto err_remote_ep_node_put;
return 0;
-err_ep_node_put:
+err_remote_ep_node_put:
fwnode_handle_put(rxport->fwnode);
err_ser_node_put:
of_node_put(rxport->remote_of_node);
@@ -3659,8 +3787,6 @@ static int ub960_notify_bound(struct v4l2_async_notifier *notifier,
unsigned int i;
int ret;
- dev_dbg(dev, "Bind %s\n", subdev->name);
-
ret = media_entity_get_fwnode_pad(&subdev->entity, rxport->fwnode,
MEDIA_PAD_FL_SOURCE);
if (ret < 0) {
@@ -3700,11 +3826,7 @@ static void ub960_notify_unbind(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
{
- struct ub960_data *priv = sd_to_ub960(notifier->sd);
struct ub960_rxport *rxport = to_ub960_asd(asd)->rxport;
- struct device *dev = &priv->client->dev;
-
- dev_dbg(dev, "Unbind %s\n", subdev->name);
rxport->sd = NULL;
}
@@ -3755,10 +3877,6 @@ static int ub960_v4l2_notifier_register(struct ub960_data *priv)
static void ub960_v4l2_notifier_unregister(struct ub960_data *priv)
{
- struct device *dev = &priv->client->dev;
-
- dev_dbg(dev, "Unregister async notif\n");
-
v4l2_async_nf_unregister(&priv->notifier);
v4l2_async_nf_cleanup(&priv->notifier);
}
@@ -3870,7 +3988,8 @@ static void ub960_reset(struct ub960_data *priv, bool reset_regs)
int ret;
u8 bit;
- bit = reset_regs ? BIT(1) : BIT(0);
+ bit = reset_regs ? UB960_SR_RESET_DIGITAL_RESET1 :
+ UB960_SR_RESET_DIGITAL_RESET0;
ub960_write(priv, UB960_SR_RESET, bit);
@@ -4041,7 +4160,9 @@ static int ub960_probe(struct i2c_client *client)
/* release GPIO lock */
if (priv->hw_data->ub9702)
- ub960_update_bits(priv, UB960_SR_RESET, BIT(5), BIT(5));
+ ub960_update_bits(priv, UB960_SR_RESET,
+ UB960_SR_RESET_GPIO_LOCK_RELEASE,
+ UB960_SR_RESET_GPIO_LOCK_RELEASE);
ret = ub960_parse_dt(priv);
if (ret)
@@ -4051,10 +4172,14 @@ static int ub960_probe(struct i2c_client *client)
if (ret)
goto err_free_ports;
- ret = ub960_init_rx_ports(priv);
+ ret = ub960_rxport_enable_vpocs(priv);
if (ret)
goto err_free_ports;
+ ret = ub960_init_rx_ports(priv);
+ if (ret)
+ goto err_disable_vpocs;
+
ub960_reset(priv, false);
ub960_rxport_wait_locks(priv, 0xf, NULL);
@@ -4067,7 +4192,7 @@ static int ub960_probe(struct i2c_client *client)
ret = ub960_init_atr(priv);
if (ret)
- goto err_free_ports;
+ goto err_disable_vpocs;
ret = ub960_rxport_add_serializers(priv);
if (ret)
@@ -4077,43 +4202,20 @@ static int ub960_probe(struct i2c_client *client)
if (ret)
goto err_free_sers;
- if (client->irq) {
- dev_dbg(dev, "using IRQ %d\n", client->irq);
+ if (client->irq)
+ dev_warn(dev, "irq support not implemented, using polling\n");
- ret = devm_request_threaded_irq(dev, client->irq, NULL,
- ub960_handle_events,
- IRQF_ONESHOT, client->name,
- priv);
- if (ret) {
- dev_err(dev, "Cannot enable IRQ (%d)\n", ret);
- goto err_irq;
- }
-
- /* Disable GPIO3 as input */
- ub960_update_bits(priv, UB960_SR_GPIO_INPUT_CTL, BIT(3), 0);
- /* Enable GPIO3 as output, active low interrupt */
- ub960_write(priv, UB960_SR_GPIO_PIN_CTL(3), 0xd1);
-
- ub960_write(priv, UB960_SR_INTERRUPT_CTL,
- UB960_SR_INTERRUPT_CTL_ALL);
- } else {
- /* No IRQ, fallback to polling */
- schedule_delayed_work(&priv->poll_work,
- msecs_to_jiffies(UB960_POLL_TIME_MS));
-
- dev_dbg(dev, "using polling mode\n");
- }
-
- dev_info(dev, "Successfully probed\n");
+ schedule_delayed_work(&priv->poll_work,
+ msecs_to_jiffies(UB960_POLL_TIME_MS));
return 0;
-err_irq:
- ub960_destroy_subdev(priv);
err_free_sers:
ub960_rxport_remove_serializers(priv);
err_uninit_atr:
ub960_uninit_atr(priv);
+err_disable_vpocs:
+ ub960_rxport_disable_vpocs(priv);
err_free_ports:
ub960_rxport_free_ports(priv);
ub960_txport_free_ports(priv);
@@ -4130,20 +4232,17 @@ static void ub960_remove(struct i2c_client *client)
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ub960_data *priv = sd_to_ub960(sd);
- dev_dbg(&client->dev, "Removing\n");
-
cancel_delayed_work_sync(&priv->poll_work);
ub960_destroy_subdev(priv);
ub960_rxport_remove_serializers(priv);
ub960_uninit_atr(priv);
+ ub960_rxport_disable_vpocs(priv);
ub960_rxport_free_ports(priv);
ub960_txport_free_ports(priv);
ub960_disable_core_hw(priv);
mutex_destroy(&priv->atr_alias_table.lock);
mutex_destroy(&priv->reg_lock);
-
- dev_dbg(&client->dev, "Remove done\n");
}
static const struct ub960_hw_data ds90ub960_hw = {
@@ -4190,6 +4289,7 @@ static struct i2c_driver ds90ub960_driver = {
module_i2c_driver(ds90ub960_driver);
MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Texas Instruments DS90UB960-Q1 FPDLink-3 deserializer driver");
+MODULE_DESCRIPTION("Texas Instruments DS90UB960-Q1 FPD-Link deserializer driver");
MODULE_AUTHOR("Luca Ceresoli <luca@lucaceresoli.net>");
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>");
+MODULE_IMPORT_NS(I2C_ATR);
diff --git a/include/linux/i2c-atr.h b/include/linux/i2c-atr.h
index 044c87c5b336..5b879115dfc6 100644
--- a/include/linux/i2c-atr.h
+++ b/include/linux/i2c-atr.h
@@ -3,6 +3,7 @@
* I2C Address Translator
*
* Copyright (c) 2019,2022 Luca Ceresoli <luca@lucaceresoli.net>
+ * Copyright (c) 2022,2023 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
*
* Based on i2c-mux.h
*/
@@ -11,12 +12,11 @@
#define _LINUX_I2C_ATR_H
#include <linux/i2c.h>
-#include <linux/mutex.h>
#include <linux/types.h>
struct device;
-struct i2c_atr;
struct fwnode_handle;
+struct i2c_atr;
/**
* struct i2c_atr_ops - Callbacks from ATR to the device driver.
@@ -42,41 +42,77 @@ struct i2c_atr_ops {
};
/**
- * struct i2c_atr - Represents the I2C ATR instance
+ * i2c_atr_new() - Allocate and initialize an I2C ATR helper.
+ * @parent: The parent (upstream) adapter
+ * @dev: The device acting as an ATR
+ * @ops: Driver-specific callbacks
+ * @max_adapters: Maximum number of child adapters
+ *
+ * The new ATR helper is connected to the parent adapter but has no child
+ * adapters. Call i2c_atr_add_adapter() to add some.
+ *
+ * Call i2c_atr_delete() to remove.
+ *
+ * Return: pointer to the new ATR helper object, or ERR_PTR
*/
-struct i2c_atr {
- /* private: internal use only */
-
- struct i2c_adapter *parent;
- struct device *dev;
- const struct i2c_atr_ops *ops;
-
- void *priv;
-
- struct i2c_algorithm algo;
- /* lock for the I2C bus segment (see struct i2c_lock_operations) */
- struct mutex lock;
- int max_adapters;
-
- struct i2c_adapter *adapter[];
-};
-
struct i2c_atr *i2c_atr_new(struct i2c_adapter *parent, struct device *dev,
const struct i2c_atr_ops *ops, int max_adapters);
-void i2c_atr_delete(struct i2c_atr *atr);
-
-static inline void i2c_atr_set_clientdata(struct i2c_atr *atr, void *data)
-{
- atr->priv = data;
-}
-static inline void *i2c_atr_get_clientdata(struct i2c_atr *atr)
-{
- return atr->priv;
-}
+/**
+ * i2c_atr_delete - Delete an I2C ATR helper.
+ * @atr: I2C ATR helper to be deleted.
+ *
+ * Precondition: all the adapters added with i2c_atr_add_adapter() mumst be
+ * removed by calling i2c_atr_del_adapter().
+ */
+void i2c_atr_delete(struct i2c_atr *atr);
+/**
+ * i2c_atr_add_adapter - Create a child ("downstream") I2C bus.
+ * @atr: The I2C ATR
+ * @chan_id: Index of the new adapter (0 .. max_adapters-1). This value is
+ * passed to the callbacks in `struct i2c_atr_ops`.
+ * @bus_handle: The fwnode handle that points to the adapter's i2c
+ * peripherals, or NULL.
+ *
+ * After calling this function a new i2c bus will appear. Adding and removing
+ * devices on the downstream bus will result in calls to the
+ * &i2c_atr_ops->attach_client and &i2c_atr_ops->detach_client callbacks for the
+ * driver to assign an alias to the device.
+ *
+ * The adapter's fwnode is set to @bus_handle, or if @bus_handle is NULL the
+ * function looks for a child node whose 'reg' property matches the chan_id
+ * under the i2c-atr device's 'i2c-atr' node.
+ *
+ * Call i2c_atr_del_adapter() to remove the adapter.
+ *
+ * Return: 0 on success, a negative error code otherwise.
+ */
int i2c_atr_add_adapter(struct i2c_atr *atr, u32 chan_id,
- struct fwnode_handle *bus_np);
+ struct fwnode_handle *bus_handle);
+
+/**
+ * i2c_atr_del_adapter - Remove a child ("downstream") I2C bus added by
+ * i2c_atr_add_adapter(). If no I2C bus has been added
+ * this function is a no-op.
+ * @atr: The I2C ATR
+ * @chan_id: Index of the adapter to be removed (0 .. max_adapters-1)
+ */
void i2c_atr_del_adapter(struct i2c_atr *atr, u32 chan_id);
+/**
+ * i2c_atr_set_driver_data - Set private driver data to the i2c-atr instance.
+ * @atr: The I2C ATR
+ * @data: Pointer to the data to store
+ */
+void i2c_atr_set_driver_data(struct i2c_atr *atr, void *data);
+
+/**
+ * i2c_atr_get_driver_data - Get the stored drive data.
+ * @atr: The I2C ATR
+ *
+ * Return: Pointer to the stored data
+ */
+void *i2c_atr_get_driver_data(struct i2c_atr *atr);
+
#endif /* _LINUX_I2C_ATR_H */
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