* [PATCH v6 0/2] MAX9286 GMSL Support
@ 2019-12-11 12:44 Kieran Bingham
2019-12-11 12:44 ` [PATCH v6 1/2] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286 Kieran Bingham
2019-12-11 12:44 ` [PATCH v6 2/2] media: i2c: Add MAX9286 driver Kieran Bingham
0 siblings, 2 replies; 5+ messages in thread
From: Kieran Bingham @ 2019-12-11 12:44 UTC (permalink / raw)
To: linux-renesas-soc, linux-media, devicetree, linux-kernel,
Mauro Carvalho Chehab
Cc: Kieran Bingham, Laurent Pinchart, Jacopo Mondi,
Niklas Söderlund, Rob Herring, Mark Rutland, sakari.ailus,
Hans Verkuil, Kieran Bingham
This series provides the deserialiser driver for GMSL cameras on the R-Car ADAS
platforms.
These drivers originate from Cogent Embedded, and have been refactored to split
the MAX9286 away from the RDACM20 drivers which were once very tightly coupled.
This posting is the culmination of > 100 changesets spread across Jacopo,
Niklas, Laurent and myself - thus they contain all of our SoB tags.
This driver along with an intiial camera driver for the RDACM20 and the
associated platform support for the Renesas R-Car Salvator-X, and the Eagle-V3M
can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git gmsl/v6
Kieran Bingham (1):
media: i2c: Add MAX9286 driver
Laurent Pinchart (1):
dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286
.../bindings/media/i2c/maxim,max9286.yaml | 289 +++++
MAINTAINERS | 10 +
drivers/media/i2c/Kconfig | 11 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/max9286.c | 1090 +++++++++++++++++
5 files changed, 1401 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
create mode 100644 drivers/media/i2c/max9286.c
--
2.20.1
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v6 1/2] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286
2019-12-11 12:44 [PATCH v6 0/2] MAX9286 GMSL Support Kieran Bingham
@ 2019-12-11 12:44 ` Kieran Bingham
2019-12-18 18:13 ` Rob Herring
2019-12-11 12:44 ` [PATCH v6 2/2] media: i2c: Add MAX9286 driver Kieran Bingham
1 sibling, 1 reply; 5+ messages in thread
From: Kieran Bingham @ 2019-12-11 12:44 UTC (permalink / raw)
To: linux-renesas-soc, linux-media, devicetree, linux-kernel,
Mauro Carvalho Chehab
Cc: Kieran Bingham, Laurent Pinchart, Jacopo Mondi,
Niklas Söderlund, Rob Herring, Mark Rutland, sakari.ailus,
Hans Verkuil, Laurent Pinchart, Jacopo Mondi, Kieran Bingham,
Niklas Söderlund
From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
The MAX9286 deserializes video data received on up to 4 Gigabit
Multimedia Serial Links (GMSL) and outputs them on a CSI-2 port using up
to 4 data lanes.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
.../bindings/media/i2c/maxim,max9286.yaml | 289 ++++++++++++++++++
1 file changed, 289 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
new file mode 100644
index 000000000000..d37ea2c432f6
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
@@ -0,0 +1,289 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright (C) 2019 Renesas Electronics Corp.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/maxim,max9286.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim Integrated Quad GMSL Deserializer
+
+maintainers:
+ - Jacopo Mondi <jacopo+renesas@jmondi.org>
+ - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+ - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
+ - Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
+
+description: -|
+ The MAX9286 deserializer receives video data on up to 4 Gigabit Multimedia
+ Serial Links (GMSL) and outputs them on a CSI-2 D-PHY port using up to 4 data
+ lanes.
+
+ In addition to video data, the GMSL links carry a bidirectional control
+ channel that encapsulates I2C messages. The MAX9286 forwards all I2C traffic
+ not addressed to itself to the other side of the links, where a GMSL
+ serializer will output it on a local I2C bus. In the other direction all I2C
+ traffic received over GMSL by the MAX9286 is output on the local I2C bus.
+
+properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ compatible:
+ const: maxim,max9286
+
+ reg:
+ description: I2C device address
+ maxItems: 1
+
+ poc-supply:
+ description: Regulator providing Power over Coax to the cameras
+ maxItems: 1
+
+ enable-gpios:
+ description: GPIO connected to the \#PWDN pin with inverted polarity
+ maxItems: 1
+
+ ports:
+ type: object
+ description: -|
+ The connections to the MAX9286 GMSL and its endpoint nodes are modelled
+ using the OF graph bindings in accordance with the video interface
+ bindings defined in
+ Documentation/devicetree/bindings/media/video-interfaces.txt.
+
+ The following table lists the port number corresponding to each device
+ port.
+
+ Port Description
+ ----------------------------------------
+ Port 0 GMSL Input 0
+ Port 1 GMSL Input 1
+ Port 2 GMSL Input 2
+ Port 3 GMSL Input 3
+ Port 4 CSI-2 Output
+
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ port@[0-3]:
+ type: object
+ properties:
+ reg:
+ enum: [ 0, 1, 2, 3 ]
+
+ endpoint:
+ type: object
+
+ properties:
+ remote-endpoint:
+ description: -|
+ phandle to the remote GMSL source endpoint subnode in the
+ remote node port.
+ maxItems: 1
+
+ required:
+ - remote-endpoint
+
+ required:
+ - reg
+ - endpoint
+
+ additionalProperties: false
+
+ port@4:
+ type: object
+ properties:
+ reg:
+ const: 4
+
+ endpoint:
+ type: object
+
+ properties:
+ remote-endpoint:
+ description: phandle to the remote CSI-2 sink endpoint.
+ maxItems: 1
+
+ data-lanes:
+ description: array of physical CSI-2 data lane indexes.
+
+ required:
+ - remote-endpoint
+ - data-lanes
+
+ required:
+ - reg
+ - endpoint
+
+ additionalProperties: false
+
+ required:
+ - port@4
+
+ i2c-mux:
+ type: object
+ description: -|
+ Each GMSL link is modelled as a child bus of an i2c bus
+ multiplexer/switch, in accordance with bindings described in
+ Documentation/devicetree/bindings/i2c/i2c-mux.txt. The serializer
+ device on the remote end of the GMSL link shall be modelled as a child
+ node of the corresponding I2C bus.
+
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - ports
+ - i2c-mux
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ i2c@e66d8000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ reg = <0 0xe66d8000 0 0x40>;
+
+ gmsl-deserializer@2c {
+ compatible = "maxim,max9286";
+ reg = <0x2c>;
+ poc-supply = <&camera_poc_12v>;
+ enable-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ max9286_in0: endpoint {
+ remote-endpoint = <&rdacm20_out0>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ max9286_in1: endpoint {
+ remote-endpoint = <&rdacm20_out1>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+
+ max9286_in2: endpoint {
+ remote-endpoint = <&rdacm20_out2>;
+ };
+ };
+
+ port@3 {
+ reg = <3>;
+
+ max9286_in3: endpoint {
+ remote-endpoint = <&rdacm20_out3>;
+ };
+ };
+
+ port@4 {
+ reg = <4>;
+
+ max9286_out: endpoint {
+ data-lanes = <1 2 3 4>;
+ remote-endpoint = <&csi40_in>;
+ };
+ };
+ };
+
+ i2c-mux {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ reg = <0>;
+
+ camera@51 {
+ reg = <0x51>;
+
+ port {
+ rdacm20_out0: endpoint {
+ remote-endpoint = <&max9286_in0>;
+ };
+ };
+
+ };
+ };
+
+ i2c@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+
+ camera@52 {
+ reg = <0x52>;
+
+ port {
+ rdacm20_out1: endpoint {
+ remote-endpoint = <&max9286_in1>;
+ };
+ };
+ };
+ };
+
+ i2c@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <2>;
+
+ camera@53 {
+ reg = <0x53>;
+
+ port {
+ rdacm20_out2: endpoint {
+ remote-endpoint = <&max9286_in2>;
+ };
+ };
+ };
+ };
+
+ i2c@3 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <3>;
+
+ camera@54 {
+ reg = <0x54>;
+
+ port {
+ rdacm20_out3: endpoint {
+ remote-endpoint = <&max9286_in3>;
+ };
+ };
+ };
+ };
+ };
+ };
+ };
--
2.20.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v6 2/2] media: i2c: Add MAX9286 driver
2019-12-11 12:44 [PATCH v6 0/2] MAX9286 GMSL Support Kieran Bingham
2019-12-11 12:44 ` [PATCH v6 1/2] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286 Kieran Bingham
@ 2019-12-11 12:44 ` Kieran Bingham
1 sibling, 0 replies; 5+ messages in thread
From: Kieran Bingham @ 2019-12-11 12:44 UTC (permalink / raw)
To: linux-renesas-soc, linux-media, devicetree, linux-kernel,
Mauro Carvalho Chehab
Cc: Kieran Bingham, Laurent Pinchart, Jacopo Mondi,
Niklas Söderlund, Rob Herring, Mark Rutland, sakari.ailus,
Hans Verkuil, Kieran Bingham, Jacopo Mondi, Laurent Pinchart,
Niklas Söderlund
The MAX9286 is a 4-channel GMSL deserializer with coax or STP input and
CSI-2 output. The device supports multicamera streaming applications,
and features the ability to synchronise the attached cameras.
CSI-2 output can be configured with 1 to 4 lanes, and a control channel
is supported over I2C, which implements an I2C mux to facilitate
communications with connected cameras across the reverse control
channel.
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
--
v2:
- Fix MAINTAINERS entry
This posting is released with the following modifications to work
without Sakari's VC developments:
- max9286_g_mbus_config() re-instated
- max9286_get_frame_desc() is not bus/csi aware
- max9286_{get,set}_routing() removed
v3:
- Initialise notifier with v4l2_async_notifier_init
- Update for new mbus csi2 format V4L2_MBUS_CSI2_DPHY
v4: - Re-introduce required code to function with the VC series.
- Implement max9286_get_routing, max9286_set_routing
- Remove max9286_g_mbus_config
v5: (internal release)
- Fix printk formatting for hex value
- max9286->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE (add |)
- MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER -> MEDIA_ENT_F_VID_IF_BRIDGE
- Remove 'device is bound' workaround
v6:
- v4l2_subdev_krouting instead of v4l2_subdev_routing separated
to allow integration without the VC/V4L2-Mux series.
- convert sd_to_max9286 to inline function
- rename max9286_device to max9286_priv
- Cleanup the v4l2_async_notifier
- Extend MODULE_AUTHOR
- Replace of_graph_get_endpoint_by_regs with fwnode_graph_get_endpoint_by_id
- Pass default bus type when parsing fwnode endpoint (Manivannan Sadhasivam)
- Use new YAML file reference in MAINTAINERS
- Parse new i2c-mux node in max9286_get_i2c_by_id
(This could/should be refactored to parse these separately first)
- Spelling and calculation fixes in the FSYNC_LOCKED check comments
- Identify each enabled i2c-mux channel in a single pass
- max9286: Improve mux-state readbility [v2]
- Fix frame sync lock durations
- Add comment to describe /why/ we must open the mux in s_stream
- use -EXDEV as return code for failed link synchronisation.
- Fix reference counting of the dt nodeS
- Convert to probe_new for I2C
- Remove redundant max9286_i2c_mux_state
- Provide optional enable-gpio (max9286-pwdn)
---
MAINTAINERS | 10 +
drivers/media/i2c/Kconfig | 11 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/max9286.c | 1090 +++++++++++++++++++++++++++++++++++
4 files changed, 1112 insertions(+)
create mode 100644 drivers/media/i2c/max9286.c
diff --git a/MAINTAINERS b/MAINTAINERS
index eefa1e066655..f3ef49efd4e7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10034,6 +10034,16 @@ F: Documentation/devicetree/bindings/hwmon/max6697.txt
F: drivers/hwmon/max6697.c
F: include/linux/platform_data/max6697.h
+MAX9286 QUAD GMSL DESERIALIZER DRIVER
+M: Jacopo Mondi <jacopo+renesas@jmondi.org>
+M: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+M: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
+M: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
+F: drivers/media/i2c/max9286.c
+
MAX9860 MONO AUDIO VOICE CODEC DRIVER
M: Peter Rosin <peda@axentia.se>
L: alsa-devel@alsa-project.org (moderated for non-subscribers)
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index c68e002d26ea..32a4deb90617 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -442,6 +442,17 @@ config VIDEO_VPX3220
To compile this driver as a module, choose M here: the
module will be called vpx3220.
+config VIDEO_MAX9286
+ tristate "Maxim MAX9286 GMSL deserializer support"
+ depends on I2C && I2C_MUX
+ depends on VIDEO_V4L2_SUBDEV_API && MEDIA_CONTROLLER
+ select V4L2_FWNODE
+ help
+ This driver supports the Maxim MAX9286 GMSL deserializer.
+
+ To compile this driver as a module, choose M here: the
+ module will be called max9286.
+
comment "Video and audio decoders"
config VIDEO_SAA717X
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index c147bb9d28db..8896cf8bfc4f 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -117,5 +117,6 @@ obj-$(CONFIG_VIDEO_IMX290) += imx290.o
obj-$(CONFIG_VIDEO_IMX319) += imx319.o
obj-$(CONFIG_VIDEO_IMX355) += imx355.o
obj-$(CONFIG_VIDEO_ST_MIPID02) += st-mipid02.o
+obj-$(CONFIG_VIDEO_MAX9286) += max9286.o
obj-$(CONFIG_SDR_MAX2175) += max2175.o
diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c
new file mode 100644
index 000000000000..4761e0b92ba2
--- /dev/null
+++ b/drivers/media/i2c/max9286.c
@@ -0,0 +1,1090 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Maxim MAX9286 GMSL Deserializer Driver
+ *
+ * Copyright (C) 2017-2019 Jacopo Mondi
+ * Copyright (C) 2017-2019 Kieran Bingham
+ * Copyright (C) 2017-2019 Laurent Pinchart
+ * Copyright (C) 2017-2019 Niklas Söderlund
+ * Copyright (C) 2016 Renesas Electronics Corporation
+ * Copyright (C) 2015 Cogent Embedded, Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/fwnode.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/i2c-mux.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+/* Register 0x00 */
+#define MAX9286_MSTLINKSEL_AUTO (7 << 5)
+#define MAX9286_MSTLINKSEL(n) ((n) << 5)
+#define MAX9286_EN_VS_GEN BIT(4)
+#define MAX9286_LINKEN(n) (1 << (n))
+/* Register 0x01 */
+#define MAX9286_FSYNCMODE_ECU (3 << 6)
+#define MAX9286_FSYNCMODE_EXT (2 << 6)
+#define MAX9286_FSYNCMODE_INT_OUT (1 << 6)
+#define MAX9286_FSYNCMODE_INT_HIZ (0 << 6)
+#define MAX9286_GPIEN BIT(5)
+#define MAX9286_ENLMO_RSTFSYNC BIT(2)
+#define MAX9286_FSYNCMETH_AUTO (2 << 0)
+#define MAX9286_FSYNCMETH_SEMI_AUTO (1 << 0)
+#define MAX9286_FSYNCMETH_MANUAL (0 << 0)
+#define MAX9286_REG_FSYNC_PERIOD_L 0x06
+#define MAX9286_REG_FSYNC_PERIOD_M 0x07
+#define MAX9286_REG_FSYNC_PERIOD_H 0x08
+/* Register 0x0a */
+#define MAX9286_FWDCCEN(n) (1 << ((n) + 4))
+#define MAX9286_REVCCEN(n) (1 << (n))
+/* Register 0x0c */
+#define MAX9286_HVEN BIT(7)
+#define MAX9286_EDC_6BIT_HAMMING (2 << 5)
+#define MAX9286_EDC_6BIT_CRC (1 << 5)
+#define MAX9286_EDC_1BIT_PARITY (0 << 5)
+#define MAX9286_DESEL BIT(4)
+#define MAX9286_INVVS BIT(3)
+#define MAX9286_INVHS BIT(2)
+#define MAX9286_HVSRC_D0 (2 << 0)
+#define MAX9286_HVSRC_D14 (1 << 0)
+#define MAX9286_HVSRC_D18 (0 << 0)
+/* Register 0x12 */
+#define MAX9286_CSILANECNT(n) (((n) - 1) << 6)
+#define MAX9286_CSIDBL BIT(5)
+#define MAX9286_DBL BIT(4)
+#define MAX9286_DATATYPE_USER_8BIT (11 << 0)
+#define MAX9286_DATATYPE_USER_YUV_12BIT (10 << 0)
+#define MAX9286_DATATYPE_USER_24BIT (9 << 0)
+#define MAX9286_DATATYPE_RAW14 (8 << 0)
+#define MAX9286_DATATYPE_RAW11 (7 << 0)
+#define MAX9286_DATATYPE_RAW10 (6 << 0)
+#define MAX9286_DATATYPE_RAW8 (5 << 0)
+#define MAX9286_DATATYPE_YUV422_10BIT (4 << 0)
+#define MAX9286_DATATYPE_YUV422_8BIT (3 << 0)
+#define MAX9286_DATATYPE_RGB555 (2 << 0)
+#define MAX9286_DATATYPE_RGB565 (1 << 0)
+#define MAX9286_DATATYPE_RGB888 (0 << 0)
+/* Register 0x15 */
+#define MAX9286_VC(n) ((n) << 5)
+#define MAX9286_VCTYPE BIT(4)
+#define MAX9286_CSIOUTEN BIT(3)
+#define MAX9286_0X15_RESV (3 << 0)
+/* Register 0x1b */
+#define MAX9286_SWITCHIN(n) (1 << ((n) + 4))
+#define MAX9286_ENEQ(n) (1 << (n))
+/* Register 0x27 */
+#define MAX9286_LOCKED BIT(7)
+/* Register 0x31 */
+#define MAX9286_FSYNC_LOCKED BIT(6)
+/* Register 0x34 */
+#define MAX9286_I2CLOCACK BIT(7)
+#define MAX9286_I2CSLVSH_1046NS_469NS (3 << 5)
+#define MAX9286_I2CSLVSH_938NS_352NS (2 << 5)
+#define MAX9286_I2CSLVSH_469NS_234NS (1 << 5)
+#define MAX9286_I2CSLVSH_352NS_117NS (0 << 5)
+#define MAX9286_I2CMSTBT_837KBPS (7 << 2)
+#define MAX9286_I2CMSTBT_533KBPS (6 << 2)
+#define MAX9286_I2CMSTBT_339KBPS (5 << 2)
+#define MAX9286_I2CMSTBT_173KBPS (4 << 2)
+#define MAX9286_I2CMSTBT_105KBPS (3 << 2)
+#define MAX9286_I2CMSTBT_84KBPS (2 << 2)
+#define MAX9286_I2CMSTBT_28KBPS (1 << 2)
+#define MAX9286_I2CMSTBT_8KBPS (0 << 2)
+#define MAX9286_I2CSLVTO_NONE (3 << 0)
+#define MAX9286_I2CSLVTO_1024US (2 << 0)
+#define MAX9286_I2CSLVTO_256US (1 << 0)
+#define MAX9286_I2CSLVTO_64US (0 << 0)
+/* Register 0x3b */
+#define MAX9286_REV_TRF(n) ((n) << 4)
+#define MAX9286_REV_AMP(n) ((((n) - 30) / 10) << 1) /* in mV */
+#define MAX9286_REV_AMP_X BIT(0)
+/* Register 0x3f */
+#define MAX9286_EN_REV_CFG BIT(6)
+#define MAX9286_REV_FLEN(n) ((n) - 20)
+/* Register 0x49 */
+#define MAX9286_VIDEO_DETECT_MASK 0x0f
+/* Register 0x69 */
+#define MAX9286_LFLTBMONMASKED BIT(7)
+#define MAX9286_LOCKMONMASKED BIT(6)
+#define MAX9286_AUTOCOMBACKEN BIT(5)
+#define MAX9286_AUTOMASKEN BIT(4)
+#define MAX9286_MASKLINK(n) ((n) << 0)
+
+#define MAX9286_NUM_GMSL 4
+#define MAX9286_N_SINKS 4
+#define MAX9286_N_PADS 5
+#define MAX9286_SRC_PAD 4
+
+#define MAXIM_I2C_I2C_SPEED_400KHZ MAX9286_I2CMSTBT_339KBPS
+#define MAXIM_I2C_I2C_SPEED_100KHZ MAX9286_I2CMSTBT_105KBPS
+#define MAXIM_I2C_SPEED MAXIM_I2C_I2C_SPEED_100KHZ
+
+struct max9286_source {
+ struct v4l2_async_subdev asd;
+ struct v4l2_subdev *sd;
+ struct fwnode_handle *fwnode;
+};
+
+#define asd_to_max9286_source(_asd) \
+ container_of(_asd, struct max9286_source, asd)
+
+struct max9286_priv {
+ struct i2c_client *client;
+ struct gpio_desc *gpiod_pwdn;
+ struct v4l2_subdev sd;
+ struct media_pad pads[MAX9286_N_PADS];
+ struct regulator *regulator;
+ bool poc_enabled;
+
+ struct i2c_mux_core *mux;
+ unsigned int mux_channel;
+ bool mux_open;
+
+ struct v4l2_ctrl_handler ctrls;
+
+ struct v4l2_mbus_framefmt fmt[MAX9286_N_SINKS];
+
+ unsigned int nsources;
+ unsigned int source_mask;
+ unsigned int route_mask;
+ unsigned int csi2_data_lanes;
+ struct max9286_source sources[MAX9286_NUM_GMSL];
+ struct v4l2_async_notifier notifier;
+};
+
+static struct max9286_source *next_source(struct max9286_priv *priv,
+ struct max9286_source *source)
+{
+ if (!source)
+ source = &priv->sources[0];
+ else
+ source++;
+
+ for (; source < &priv->sources[MAX9286_NUM_GMSL]; source++) {
+ if (source->fwnode)
+ return source;
+ }
+
+ return NULL;
+}
+
+#define for_each_source(priv, source) \
+ for ((source) = NULL; ((source) = next_source((priv), (source))); )
+
+#define to_index(priv, source) ((source) - &(priv)->sources[0])
+
+static inline struct max9286_priv *sd_to_max9286(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct max9286_priv, sd);
+}
+
+/* -----------------------------------------------------------------------------
+ * I2C IO
+ */
+
+static int max9286_read(struct max9286_priv *priv, u8 reg)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(priv->client, reg);
+ if (ret < 0)
+ dev_err(&priv->client->dev,
+ "%s: register 0x%02x read failed (%d)\n",
+ __func__, reg, ret);
+
+ return ret;
+}
+
+static int max9286_write(struct max9286_priv *priv, u8 reg, u8 val)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(priv->client, reg, val);
+ if (ret < 0)
+ dev_err(&priv->client->dev,
+ "%s: register 0x%02x write failed (%d)\n",
+ __func__, reg, ret);
+
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * I2C Multiplexer
+ */
+
+static void max9286_i2c_mux_configure(struct max9286_priv *priv, u8 conf)
+{
+ max9286_write(priv, 0x0a, conf);
+
+ /*
+ * We must sleep after any change to the forward or reverse channel
+ * configuration.
+ */
+ usleep_range(3000, 5000);
+}
+
+static void max9286_i2c_mux_open(struct max9286_priv *priv)
+{
+ /* Open all channels on the MAX9286 */
+ max9286_i2c_mux_configure(priv, 0xff);
+
+ priv->mux_open = true;
+}
+
+static void max9286_i2c_mux_close(struct max9286_priv *priv)
+{
+ /*
+ * Ensure that both the forward and reverse channel are disabled on the
+ * mux, and that the channel ID is invalidated to ensure we reconfigure
+ * on the next max9286_i2c_mux_select() call.
+ */
+ max9286_i2c_mux_configure(priv, 0x00);
+
+ priv->mux_open = false;
+ priv->mux_channel = -1;
+}
+
+static int max9286_i2c_mux_select(struct i2c_mux_core *muxc, u32 chan)
+{
+ struct max9286_priv *priv = i2c_mux_priv(muxc);
+
+ /* Channel select is disabled when configured in the opened state. */
+ if (priv->mux_open)
+ return 0;
+
+ if (priv->mux_channel == chan)
+ return 0;
+
+ priv->mux_channel = chan;
+
+ max9286_i2c_mux_configure(priv,
+ MAX9286_FWDCCEN(chan) |
+ MAX9286_REVCCEN(chan));
+
+ return 0;
+}
+
+static int max9286_i2c_mux_init(struct max9286_priv *priv)
+{
+ struct max9286_source *source;
+ int ret;
+
+ if (!i2c_check_functionality(priv->client->adapter,
+ I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
+ return -ENODEV;
+
+ priv->mux = i2c_mux_alloc(priv->client->adapter, &priv->client->dev,
+ priv->nsources, 0, I2C_MUX_LOCKED,
+ max9286_i2c_mux_select, NULL);
+ if (!priv->mux)
+ return -ENOMEM;
+
+ priv->mux->priv = priv;
+
+ for_each_source(priv, source) {
+ unsigned int index = to_index(priv, source);
+
+ ret = i2c_mux_add_adapter(priv->mux, 0, index, 0);
+ if (ret < 0)
+ goto error;
+ }
+
+ return 0;
+
+error:
+ i2c_mux_del_adapters(priv->mux);
+ return ret;
+}
+
+static void max9286_configure_i2c(struct max9286_priv *priv, bool localack)
+{
+ u8 config = MAX9286_I2CSLVSH_469NS_234NS | MAX9286_I2CSLVTO_1024US |
+ MAXIM_I2C_SPEED;
+
+ if (localack)
+ config |= MAX9286_I2CLOCACK;
+
+ max9286_write(priv, 0x34, config);
+ usleep_range(3000, 5000);
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdev
+ */
+
+static int max9286_notify_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct max9286_priv *priv = sd_to_max9286(notifier->sd);
+ struct max9286_source *source = asd_to_max9286_source(asd);
+ unsigned int index = to_index(priv, source);
+ unsigned int src_pad;
+ int ret;
+
+ ret = media_entity_get_fwnode_pad(&subdev->entity,
+ source->fwnode,
+ MEDIA_PAD_FL_SOURCE);
+ if (ret < 0) {
+ dev_err(&priv->client->dev,
+ "Failed to find pad for %s\n", subdev->name);
+ return ret;
+ }
+
+ source->sd = subdev;
+ src_pad = ret;
+
+ ret = media_create_pad_link(&source->sd->entity, src_pad,
+ &priv->sd.entity, index,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (ret) {
+ dev_err(&priv->client->dev,
+ "Unable to link %s:%u -> %s:%u\n",
+ source->sd->name, src_pad, priv->sd.name, index);
+ return ret;
+ }
+
+ dev_dbg(&priv->client->dev, "Bound %s pad: %u on index %u\n",
+ subdev->name, src_pad, index);
+
+ return 0;
+}
+
+static void max9286_notify_unbind(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct max9286_source *source = asd_to_max9286_source(asd);
+
+ source->sd = NULL;
+}
+
+static const struct v4l2_async_notifier_operations max9286_notify_ops = {
+ .bound = max9286_notify_bound,
+ .unbind = max9286_notify_unbind,
+};
+
+/*
+ * max9286_check_video_links() - Make sure video links are detected and locked
+ *
+ * Performs safety checks on video link status. Make sure they are detected
+ * and all enabled links are locked.
+ *
+ * Returns 0 for success, -EIO for errors.
+ */
+static int max9286_check_video_links(struct max9286_priv *priv)
+{
+ unsigned int i;
+ int ret;
+
+ /*
+ * Make sure valid video links are detected.
+ * The delay is not characterized in de-serializer manual, wait up
+ * to 5 ms.
+ */
+ for (i = 0; i < 10; i++) {
+ ret = max9286_read(priv, 0x49);
+ if (ret < 0)
+ return -EIO;
+
+ if ((ret & MAX9286_VIDEO_DETECT_MASK) == priv->source_mask)
+ break;
+
+ usleep_range(350, 500);
+ }
+
+ if (i == 10) {
+ dev_err(&priv->client->dev,
+ "Unable to detect video links: 0x%02x\n", ret);
+ return -EIO;
+ }
+
+ /* Make sure all enabled links are locked (4ms max). */
+ for (i = 0; i < 10; i++) {
+ ret = max9286_read(priv, 0x27);
+ if (ret < 0)
+ return -EIO;
+
+ if (ret & MAX9286_LOCKED)
+ break;
+
+ usleep_range(350, 450);
+ }
+
+ if (i == 10) {
+ dev_err(&priv->client->dev, "Not all enabled links locked\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int max9286_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct max9286_priv *priv = sd_to_max9286(sd);
+ struct max9286_source *source;
+ unsigned int i;
+ bool sync = false;
+ int ret;
+
+ if (enable) {
+ /*
+ * The frame sync between cameras is transmitted across the
+ * reverse channel as GPIO. We must open all channels while
+ * streaming to allow this synchronisation signal to be shared.
+ */
+ max9286_i2c_mux_open(priv);
+
+ /* Start all cameras. */
+ for_each_source(priv, source) {
+ ret = v4l2_subdev_call(source->sd, video, s_stream, 1);
+ if (ret)
+ return ret;
+ }
+
+ ret = max9286_check_video_links(priv);
+ if (ret)
+ return ret;
+
+ /*
+ * Wait until frame synchronization is locked.
+ *
+ * Manual says frame sync locking should take ~6 VTS.
+ * From practical experience at least 8 are required. Give
+ * 12 complete frames time (~400ms at 30 fps) to achieve frame
+ * locking before returning error.
+ */
+ for (i = 0; i < 40; i++) {
+ if (max9286_read(priv, 0x31) & MAX9286_FSYNC_LOCKED) {
+ sync = true;
+ break;
+ }
+ usleep_range(9000, 11000);
+ }
+
+ if (!sync) {
+ dev_err(&priv->client->dev,
+ "Failed to get frame synchronization\n");
+ return -EXDEV; /* Invalid cross-device link */
+ }
+
+ /*
+ * Enable CSI output, VC set according to link number.
+ * Bit 7 must be set (chip manual says it's 0 and reserved).
+ */
+ max9286_write(priv, 0x15, 0x80 | MAX9286_VCTYPE |
+ MAX9286_CSIOUTEN | MAX9286_0X15_RESV);
+ } else {
+ max9286_write(priv, 0x15, MAX9286_VCTYPE | MAX9286_0X15_RESV);
+
+ /* Stop all cameras. */
+ for_each_source(priv, source)
+ v4l2_subdev_call(source->sd, video, s_stream, 0);
+
+ max9286_i2c_mux_close(priv);
+ }
+
+ return 0;
+}
+
+static int max9286_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->pad || code->index > 0)
+ return -EINVAL;
+
+ code->code = MEDIA_BUS_FMT_UYVY8_2X8;
+
+ return 0;
+}
+
+static struct v4l2_mbus_framefmt *
+max9286_get_pad_format(struct max9286_priv *priv,
+ struct v4l2_subdev_pad_config *cfg,
+ unsigned int pad, u32 which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_format(&priv->sd, cfg, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &priv->fmt[pad];
+ default:
+ return NULL;
+ }
+}
+
+static int max9286_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
+{
+ struct max9286_priv *priv = sd_to_max9286(sd);
+ struct v4l2_mbus_framefmt *cfg_fmt;
+
+ if (format->pad >= MAX9286_SRC_PAD)
+ return -EINVAL;
+
+ /* Refuse non YUV422 formats as we hardcode DT to 8 bit YUV422 */
+ switch (format->format.code) {
+ case MEDIA_BUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_VYUY8_2X8:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_FMT_YVYU8_2X8:
+ break;
+ default:
+ format->format.code = MEDIA_BUS_FMT_YUYV8_2X8;
+ break;
+ }
+
+ cfg_fmt = max9286_get_pad_format(priv, cfg, format->pad, format->which);
+ if (!cfg_fmt)
+ return -EINVAL;
+
+ *cfg_fmt = format->format;
+
+ return 0;
+}
+
+static int max9286_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
+{
+ struct max9286_priv *priv = sd_to_max9286(sd);
+ struct v4l2_mbus_framefmt *cfg_fmt;
+
+ if (format->pad >= MAX9286_SRC_PAD)
+ return -EINVAL;
+
+ cfg_fmt = max9286_get_pad_format(priv, cfg, format->pad, format->which);
+ if (!cfg_fmt)
+ return -EINVAL;
+
+ format->format = *cfg_fmt;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_video_ops max9286_video_ops = {
+ .s_stream = max9286_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops max9286_pad_ops = {
+ .enum_mbus_code = max9286_enum_mbus_code,
+ .get_fmt = max9286_get_fmt,
+ .set_fmt = max9286_set_fmt,
+};
+
+static const struct v4l2_subdev_ops max9286_subdev_ops = {
+ .video = &max9286_video_ops,
+ .pad = &max9286_pad_ops,
+};
+
+static void max9286_init_format(struct v4l2_mbus_framefmt *fmt)
+{
+ fmt->width = 1280;
+ fmt->height = 800;
+ fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->field = V4L2_FIELD_NONE;
+ fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
+ fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+}
+
+static int max9286_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_mbus_framefmt *format;
+ unsigned int i;
+
+ for (i = 0; i < MAX9286_N_SINKS; i++) {
+ format = v4l2_subdev_get_try_format(subdev, fh->pad, i);
+ max9286_init_format(format);
+ }
+
+ return 0;
+}
+
+static const struct v4l2_subdev_internal_ops max9286_subdev_internal_ops = {
+ .open = max9286_open,
+};
+
+/* -----------------------------------------------------------------------------
+ * Probe/Remove
+ */
+
+static int max9286_setup(struct max9286_priv *priv)
+{
+ /*
+ * Link ordering values for all enabled links combinations. Orders must
+ * be assigned sequentially from 0 to the number of enabled links
+ * without leaving any hole for disabled links. We thus assign orders to
+ * enabled links first, and use the remaining order values for disabled
+ * links are all links must have a different order value;
+ */
+ static const u8 link_order[] = {
+ (3 << 6) | (2 << 4) | (1 << 2) | (0 << 0), /* xxxx */
+ (3 << 6) | (2 << 4) | (1 << 2) | (0 << 0), /* xxx0 */
+ (3 << 6) | (2 << 4) | (0 << 2) | (1 << 0), /* xx0x */
+ (3 << 6) | (2 << 4) | (1 << 2) | (0 << 0), /* xx10 */
+ (3 << 6) | (0 << 4) | (2 << 2) | (1 << 0), /* x0xx */
+ (3 << 6) | (1 << 4) | (2 << 2) | (0 << 0), /* x1x0 */
+ (3 << 6) | (1 << 4) | (0 << 2) | (2 << 0), /* x10x */
+ (3 << 6) | (1 << 4) | (1 << 2) | (0 << 0), /* x210 */
+ (0 << 6) | (3 << 4) | (2 << 2) | (1 << 0), /* 0xxx */
+ (1 << 6) | (3 << 4) | (2 << 2) | (0 << 0), /* 1xx0 */
+ (1 << 6) | (3 << 4) | (0 << 2) | (2 << 0), /* 1x0x */
+ (2 << 6) | (3 << 4) | (1 << 2) | (0 << 0), /* 2x10 */
+ (1 << 6) | (0 << 4) | (3 << 2) | (2 << 0), /* 10xx */
+ (2 << 6) | (1 << 4) | (3 << 2) | (0 << 0), /* 21x0 */
+ (2 << 6) | (1 << 4) | (0 << 2) | (3 << 0), /* 210x */
+ (3 << 6) | (2 << 4) | (1 << 2) | (0 << 0), /* 3210 */
+ };
+
+ /*
+ * Set the I2C bus speed.
+ *
+ * Enable I2C Local Acknowledge during the probe sequences of the camera
+ * only. This should be disabled after the mux is initialised.
+ */
+ max9286_configure_i2c(priv, true);
+
+ /*
+ * Reverse channel setup.
+ *
+ * - Enable custom reverse channel configuration (through register 0x3f)
+ * and set the first pulse length to 35 clock cycles.
+ * - Increase the reverse channel amplitude to 170mV to accommodate the
+ * high threshold enabled by the serializer driver.
+ */
+ max9286_write(priv, 0x3f, MAX9286_EN_REV_CFG | MAX9286_REV_FLEN(35));
+ max9286_write(priv, 0x3b, MAX9286_REV_TRF(1) | MAX9286_REV_AMP(70) |
+ MAX9286_REV_AMP_X);
+
+ /*
+ * Enable GMSL links, mask unused ones and autodetect link
+ * used as CSI clock source.
+ */
+ max9286_write(priv, 0x00, MAX9286_MSTLINKSEL_AUTO | priv->route_mask);
+ max9286_write(priv, 0x0b, link_order[priv->route_mask]);
+ max9286_write(priv, 0x69, (0xf & ~priv->route_mask));
+
+ /*
+ * Video format setup:
+ * Disable CSI output, VC is set according to Link number.
+ */
+ max9286_write(priv, 0x15, MAX9286_VCTYPE | MAX9286_0X15_RESV);
+
+ /* Enable CSI-2 Lane D0-D3 only, DBL mode, YUV422 8-bit. */
+ max9286_write(priv, 0x12, MAX9286_CSIDBL | MAX9286_DBL |
+ MAX9286_CSILANECNT(priv->csi2_data_lanes) |
+ MAX9286_DATATYPE_YUV422_8BIT);
+
+ /* Automatic: FRAMESYNC taken from the slowest Link. */
+ max9286_write(priv, 0x01, MAX9286_FSYNCMODE_INT_HIZ |
+ MAX9286_FSYNCMETH_AUTO);
+
+ /* Enable HS/VS encoding, use D14/15 for HS/VS, invert VS. */
+ max9286_write(priv, 0x0c, MAX9286_HVEN | MAX9286_INVVS |
+ MAX9286_HVSRC_D14);
+
+ /*
+ * Wait for 2ms to allow the link to resynchronize after the
+ * configuration change.
+ */
+ usleep_range(2000, 5000);
+
+ return 0;
+}
+
+static const struct of_device_id max9286_dt_ids[] = {
+ { .compatible = "maxim,max9286" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, max9286_dt_ids);
+
+static int max9286_init(struct device *dev)
+{
+ struct max9286_priv *priv;
+ struct i2c_client *client;
+ struct fwnode_handle *ep;
+ unsigned int i;
+ int ret;
+
+ /* Skip non-max9286 devices. */
+ if (!dev->of_node || !of_match_node(max9286_dt_ids, dev->of_node))
+ return 0;
+
+ client = to_i2c_client(dev);
+ priv = i2c_get_clientdata(client);
+
+ /* Enable the bus power. */
+ ret = regulator_enable(priv->regulator);
+ if (ret < 0) {
+ dev_err(&client->dev, "Unable to turn PoC on\n");
+ return ret;
+ }
+
+ priv->poc_enabled = true;
+
+ ret = max9286_setup(priv);
+ if (ret) {
+ dev_err(dev, "Unable to setup max9286\n");
+ goto err_regulator;
+ }
+
+ v4l2_i2c_subdev_init(&priv->sd, client, &max9286_subdev_ops);
+ priv->sd.internal_ops = &max9286_subdev_internal_ops;
+ priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ v4l2_ctrl_handler_init(&priv->ctrls, 1);
+ /*
+ * FIXME: Compute the real pixel rate. The 50 MP/s value comes from the
+ * hardcoded frequency in the BSP CSI-2 receiver driver.
+ */
+ v4l2_ctrl_new_std(&priv->ctrls, NULL, V4L2_CID_PIXEL_RATE,
+ 50000000, 50000000, 1, 50000000);
+ priv->sd.ctrl_handler = &priv->ctrls;
+ ret = priv->ctrls.error;
+ if (ret)
+ goto err_regulator;
+
+ priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+
+ priv->pads[MAX9286_SRC_PAD].flags = MEDIA_PAD_FL_SOURCE;
+ for (i = 0; i < MAX9286_SRC_PAD; i++)
+ priv->pads[i].flags = MEDIA_PAD_FL_SINK;
+ ret = media_entity_pads_init(&priv->sd.entity, MAX9286_N_PADS,
+ priv->pads);
+ if (ret)
+ goto err_regulator;
+
+ ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), MAX9286_SRC_PAD,
+ 0, 0);
+ if (!ep) {
+ dev_err(dev, "Unable to retrieve endpoint on \"port@4\"\n");
+ ret = -ENOENT;
+ goto err_regulator;
+ }
+ priv->sd.fwnode = ep;
+
+ ret = v4l2_async_register_subdev(&priv->sd);
+ if (ret < 0) {
+ dev_err(dev, "Unable to register subdevice\n");
+ goto err_put_node;
+ }
+
+ ret = max9286_i2c_mux_init(priv);
+ if (ret) {
+ dev_err(dev, "Unable to initialize I2C multiplexer\n");
+ goto err_subdev_unregister;
+ }
+
+ /*
+ * Re-configure I2C with local acknowledge disabled after cameras
+ * have probed.
+ */
+ max9286_configure_i2c(priv, false);
+
+ /* Leave the mux channels disabled until they are selected. */
+ max9286_i2c_mux_close(priv);
+
+ return 0;
+
+err_subdev_unregister:
+ v4l2_async_unregister_subdev(&priv->sd);
+ max9286_i2c_mux_close(priv);
+err_put_node:
+ fwnode_handle_put(ep);
+err_regulator:
+ regulator_disable(priv->regulator);
+ priv->poc_enabled = false;
+
+ return ret;
+}
+
+static void max9286_cleanup_dt(struct max9286_priv *priv)
+{
+ struct max9286_source *source;
+
+ /*
+ * Not strictly part of the DT, but the notifier is registered during
+ * max9286_parse_dt(), and the notifier holds references to the fwnodes
+ * thus the cleanup is here to mirror the registration.
+ */
+ v4l2_async_notifier_unregister(&priv->notifier);
+ v4l2_async_notifier_cleanup(&priv->notifier);
+
+ for_each_source(priv, source) {
+ fwnode_handle_put(source->fwnode);
+ source->fwnode = NULL;
+ }
+}
+
+static int max9286_parse_dt(struct max9286_priv *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct device_node *i2c_mux;
+ struct device_node *node = NULL;
+ unsigned int i2c_mux_mask = 0;
+ int ret;
+
+ of_node_get(dev->of_node);
+ i2c_mux = of_find_node_by_name(dev->of_node, "i2c-mux");
+ if (!i2c_mux) {
+ dev_err(dev, "Failed to find i2c-mux node\n");
+ return -EINVAL;
+ }
+
+ /* Identify which i2c-mux channels are enabled */
+ for_each_child_of_node(i2c_mux, node) {
+ u32 id = 0;
+
+ of_property_read_u32(node, "reg", &id);
+ if (id >= MAX9286_NUM_GMSL)
+ continue;
+
+ if (!of_device_is_available(node)) {
+ dev_dbg(dev, "Skipping disabled I2C bus port %u\n",
+ id);
+ continue;
+ }
+
+ i2c_mux_mask |= BIT(id);
+ }
+ of_node_put(node);
+ of_node_put(i2c_mux);
+
+ v4l2_async_notifier_init(&priv->notifier);
+
+ /* Parse the endpoints */
+ for_each_endpoint_of_node(dev->of_node, node) {
+ struct max9286_source *source;
+ struct of_endpoint ep;
+
+ of_graph_parse_endpoint(node, &ep);
+ dev_dbg(dev, "Endpoint %pOF on port %d",
+ ep.local_node, ep.port);
+
+ if (ep.port > MAX9286_NUM_GMSL) {
+ dev_err(dev, "Invalid endpoint %s on port %d",
+ of_node_full_name(ep.local_node), ep.port);
+ continue;
+ }
+
+ /* For the source endpoint just parse the bus configuration. */
+ if (ep.port == MAX9286_SRC_PAD) {
+ struct v4l2_fwnode_endpoint vep = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY
+ };
+ int ret;
+
+ ret = v4l2_fwnode_endpoint_parse(
+ of_fwnode_handle(node), &vep);
+ if (ret) {
+ of_node_put(node);
+ return ret;
+ }
+
+ if (vep.bus_type != V4L2_MBUS_CSI2_DPHY) {
+ dev_err(dev,
+ "Media bus %u type not supported\n",
+ vep.bus_type);
+ v4l2_fwnode_endpoint_free(&vep);
+ of_node_put(node);
+ return -EINVAL;
+ }
+
+ priv->csi2_data_lanes =
+ vep.bus.mipi_csi2.num_data_lanes;
+ v4l2_fwnode_endpoint_free(&vep);
+
+ continue;
+ }
+
+ /* Skip if the corresponding GMSL link is unavailable. */
+ if (!(i2c_mux_mask & BIT(ep.port)))
+ continue;
+
+ if (priv->sources[ep.port].fwnode) {
+ dev_err(dev,
+ "Multiple port endpoints are not supported: %d",
+ ep.port);
+
+ continue;
+ }
+
+ source = &priv->sources[ep.port];
+ source->fwnode = fwnode_graph_get_remote_endpoint(
+ of_fwnode_handle(node));
+ if (!source->fwnode) {
+ dev_err(dev,
+ "Endpoint %pOF has no remote endpoint connection\n",
+ ep.local_node);
+
+ continue;
+ }
+
+ source->asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
+ source->asd.match.fwnode = source->fwnode;
+
+ ret = v4l2_async_notifier_add_subdev(&priv->notifier,
+ &source->asd);
+ if (ret) {
+ v4l2_async_notifier_cleanup(&priv->notifier);
+ of_node_put(node);
+ return ret;
+ }
+
+ priv->source_mask |= BIT(ep.port);
+ priv->nsources++;
+ }
+ of_node_put(node);
+
+ /* Do not register the subdev notifier if there are no devices. */
+ if (!priv->nsources)
+ return 0;
+
+ priv->route_mask = priv->source_mask;
+ priv->notifier.ops = &max9286_notify_ops;
+
+ ret = v4l2_async_subdev_notifier_register(&priv->sd, &priv->notifier);
+ if (ret)
+ v4l2_async_notifier_cleanup(&priv->notifier);
+
+ return ret;
+}
+
+static int max9286_probe(struct i2c_client *client)
+{
+ struct max9286_priv *priv;
+ unsigned int i;
+ int ret;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->client = client;
+ i2c_set_clientdata(client, priv);
+
+ for (i = 0; i < MAX9286_N_SINKS; i++)
+ max9286_init_format(&priv->fmt[i]);
+
+ ret = max9286_parse_dt(priv);
+ if (ret)
+ return ret;
+
+ priv->gpiod_pwdn = devm_gpiod_get_optional(&client->dev, "enable",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(priv->gpiod_pwdn))
+ return PTR_ERR(priv->gpiod_pwdn);
+
+ gpiod_set_consumer_name(priv->gpiod_pwdn, "max9286-pwdn");
+ gpiod_set_value_cansleep(priv->gpiod_pwdn, 1);
+
+ priv->regulator = regulator_get(&client->dev, "poc");
+ if (IS_ERR(priv->regulator)) {
+ if (PTR_ERR(priv->regulator) != -EPROBE_DEFER)
+ dev_err(&client->dev,
+ "Unable to get PoC regulator (%ld)\n",
+ PTR_ERR(priv->regulator));
+ ret = PTR_ERR(priv->regulator);
+ goto err_free;
+ }
+
+ /*
+ * We can have multiple MAX9286 instances on the same physical I2C
+ * bus, and I2C children behind ports of separate MAX9286 instances
+ * having the same I2C address. As the MAX9286 starts by default with
+ * all ports enabled, we need to disable all ports on all MAX9286
+ * instances before proceeding to further initialize the devices and
+ * instantiate children.
+ *
+ * Start by just disabling all channels on the current device. Then,
+ * if all other MAX9286 on the parent bus have been probed, proceed
+ * to initialize them all, including the current one.
+ */
+ max9286_i2c_mux_close(priv);
+
+ /*
+ * The MAX9286 initialises with auto-acknowledge enabled by default.
+ * This means that if multiple MAX9286 devices are connected to an I2C
+ * bus, another MAX9286 could ack I2C transfers meant for a device on
+ * the other side of the GMSL links for this MAX9286 (such as a
+ * MAX9271). To prevent that disable auto-acknowledge early on; it
+ * will be enabled later as needed.
+ */
+ max9286_configure_i2c(priv, false);
+
+ ret = max9286_init(&client->dev);
+ if (ret < 0)
+ goto err_regulator;
+
+ return 0;
+
+err_regulator:
+ regulator_put(priv->regulator);
+ max9286_i2c_mux_close(priv);
+ max9286_configure_i2c(priv, false);
+err_free:
+ max9286_cleanup_dt(priv);
+ kfree(priv);
+
+ return ret;
+}
+
+static int max9286_remove(struct i2c_client *client)
+{
+ struct max9286_priv *priv = i2c_get_clientdata(client);
+
+ i2c_mux_del_adapters(priv->mux);
+
+ fwnode_handle_put(priv->sd.fwnode);
+ v4l2_async_unregister_subdev(&priv->sd);
+
+ if (priv->poc_enabled)
+ regulator_disable(priv->regulator);
+ regulator_put(priv->regulator);
+
+ max9286_cleanup_dt(priv);
+
+ gpiod_set_value_cansleep(priv->gpiod_pwdn, 0);
+
+ kfree(priv);
+
+ return 0;
+}
+
+static const struct i2c_device_id max9286_id[] = {
+ { "max9286", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max9286_id);
+
+static struct i2c_driver max9286_i2c_driver = {
+ .driver = {
+ .name = "max9286",
+ .of_match_table = of_match_ptr(max9286_dt_ids),
+ },
+ .probe_new = max9286_probe,
+ .remove = max9286_remove,
+ .id_table = max9286_id,
+};
+
+module_i2c_driver(max9286_i2c_driver);
+
+MODULE_DESCRIPTION("Maxim MAX9286 GMSL Deserializer Driver");
+MODULE_AUTHOR("Jacopo Mondi, Kieran Bingham, Laurent Pinchart, Niklas Söderlund, Vladimir Barinov");
+MODULE_LICENSE("GPL");
--
2.20.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v6 1/2] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286
2019-12-11 12:44 ` [PATCH v6 1/2] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286 Kieran Bingham
@ 2019-12-18 18:13 ` Rob Herring
2019-12-19 11:46 ` Kieran Bingham
0 siblings, 1 reply; 5+ messages in thread
From: Rob Herring @ 2019-12-18 18:13 UTC (permalink / raw)
To: Kieran Bingham
Cc: linux-renesas-soc, linux-media, devicetree, linux-kernel,
Mauro Carvalho Chehab, Kieran Bingham, Laurent Pinchart,
Jacopo Mondi, Niklas Söderlund, Mark Rutland, sakari.ailus,
Hans Verkuil, Laurent Pinchart, Jacopo Mondi,
Niklas Söderlund
On Wed, Dec 11, 2019 at 12:44:58PM +0000, Kieran Bingham wrote:
> From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>
> The MAX9286 deserializes video data received on up to 4 Gigabit
> Multimedia Serial Links (GMSL) and outputs them on a CSI-2 port using up
> to 4 data lanes.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> ---
> .../bindings/media/i2c/maxim,max9286.yaml | 289 ++++++++++++++++++
> 1 file changed, 289 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
A couple of nits, with those fixed:
Reviewed-by: Rob Herring <robh@kernel.org>
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
> new file mode 100644
> index 000000000000..d37ea2c432f6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
> @@ -0,0 +1,289 @@
> +# SPDX-License-Identifier: GPL-2.0-only
Dual license new bindings please:
(GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2019 Renesas Electronics Corp.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/maxim,max9286.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Maxim Integrated Quad GMSL Deserializer
> +
> +maintainers:
> + - Jacopo Mondi <jacopo+renesas@jmondi.org>
> + - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> + - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> + - Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> +
> +description: -|
I usually see '|-', but I guess that works.
> + The MAX9286 deserializer receives video data on up to 4 Gigabit Multimedia
> + Serial Links (GMSL) and outputs them on a CSI-2 D-PHY port using up to 4 data
> + lanes.
> +
> + In addition to video data, the GMSL links carry a bidirectional control
> + channel that encapsulates I2C messages. The MAX9286 forwards all I2C traffic
> + not addressed to itself to the other side of the links, where a GMSL
> + serializer will output it on a local I2C bus. In the other direction all I2C
> + traffic received over GMSL by the MAX9286 is output on the local I2C bus.
> +
> +properties:
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + compatible:
> + const: maxim,max9286
> +
> + reg:
> + description: I2C device address
> + maxItems: 1
> +
> + poc-supply:
> + description: Regulator providing Power over Coax to the cameras
> + maxItems: 1
> +
> + enable-gpios:
> + description: GPIO connected to the \#PWDN pin with inverted polarity
> + maxItems: 1
> +
> + ports:
> + type: object
> + description: -|
> + The connections to the MAX9286 GMSL and its endpoint nodes are modelled
> + using the OF graph bindings in accordance with the video interface
> + bindings defined in
> + Documentation/devicetree/bindings/media/video-interfaces.txt.
> +
> + The following table lists the port number corresponding to each device
> + port.
> +
> + Port Description
> + ----------------------------------------
> + Port 0 GMSL Input 0
> + Port 1 GMSL Input 1
> + Port 2 GMSL Input 2
> + Port 3 GMSL Input 3
> + Port 4 CSI-2 Output
> +
> + properties:
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + port@[0-3]:
> + type: object
> + properties:
> + reg:
> + enum: [ 0, 1, 2, 3 ]
> +
> + endpoint:
> + type: object
> +
> + properties:
> + remote-endpoint:
> + description: -|
> + phandle to the remote GMSL source endpoint subnode in the
> + remote node port.
> + maxItems: 1
This is not an array. You can just drop and assume it has a type defined
elsewhere.
> +
> + required:
> + - remote-endpoint
> +
> + required:
> + - reg
> + - endpoint
> +
> + additionalProperties: false
> +
> + port@4:
> + type: object
> + properties:
> + reg:
> + const: 4
> +
> + endpoint:
> + type: object
> +
> + properties:
> + remote-endpoint:
> + description: phandle to the remote CSI-2 sink endpoint.
> + maxItems: 1
And here.
> +
> + data-lanes:
> + description: array of physical CSI-2 data lane indexes.
> +
> + required:
> + - remote-endpoint
> + - data-lanes
> +
> + required:
> + - reg
> + - endpoint
> +
> + additionalProperties: false
> +
> + required:
> + - port@4
> +
> + i2c-mux:
> + type: object
> + description: -|
> + Each GMSL link is modelled as a child bus of an i2c bus
> + multiplexer/switch, in accordance with bindings described in
> + Documentation/devicetree/bindings/i2c/i2c-mux.txt. The serializer
> + device on the remote end of the GMSL link shall be modelled as a child
> + node of the corresponding I2C bus.
> +
> + properties:
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + additionalProperties: false
> +
> +required:
> + - compatible
> + - reg
> + - ports
> + - i2c-mux
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> + i2c@e66d8000 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + reg = <0 0xe66d8000 0 0x40>;
> +
> + gmsl-deserializer@2c {
> + compatible = "maxim,max9286";
> + reg = <0x2c>;
> + poc-supply = <&camera_poc_12v>;
> + enable-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> +
> + max9286_in0: endpoint {
> + remote-endpoint = <&rdacm20_out0>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> +
> + max9286_in1: endpoint {
> + remote-endpoint = <&rdacm20_out1>;
> + };
> + };
> +
> + port@2 {
> + reg = <2>;
> +
> + max9286_in2: endpoint {
> + remote-endpoint = <&rdacm20_out2>;
> + };
> + };
> +
> + port@3 {
> + reg = <3>;
> +
> + max9286_in3: endpoint {
> + remote-endpoint = <&rdacm20_out3>;
> + };
> + };
> +
> + port@4 {
> + reg = <4>;
> +
> + max9286_out: endpoint {
> + data-lanes = <1 2 3 4>;
> + remote-endpoint = <&csi40_in>;
> + };
> + };
> + };
> +
> + i2c-mux {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + i2c@0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + reg = <0>;
> +
> + camera@51 {
> + reg = <0x51>;
> +
> + port {
> + rdacm20_out0: endpoint {
> + remote-endpoint = <&max9286_in0>;
> + };
> + };
> +
> + };
> + };
> +
> + i2c@1 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <1>;
> +
> + camera@52 {
> + reg = <0x52>;
> +
> + port {
> + rdacm20_out1: endpoint {
> + remote-endpoint = <&max9286_in1>;
> + };
> + };
> + };
> + };
> +
> + i2c@2 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <2>;
> +
> + camera@53 {
> + reg = <0x53>;
> +
> + port {
> + rdacm20_out2: endpoint {
> + remote-endpoint = <&max9286_in2>;
> + };
> + };
> + };
> + };
> +
> + i2c@3 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <3>;
> +
> + camera@54 {
> + reg = <0x54>;
> +
> + port {
> + rdacm20_out3: endpoint {
> + remote-endpoint = <&max9286_in3>;
> + };
> + };
> + };
> + };
> + };
> + };
> + };
> --
> 2.20.1
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v6 1/2] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286
2019-12-18 18:13 ` Rob Herring
@ 2019-12-19 11:46 ` Kieran Bingham
0 siblings, 0 replies; 5+ messages in thread
From: Kieran Bingham @ 2019-12-19 11:46 UTC (permalink / raw)
To: Rob Herring, Kieran Bingham
Cc: linux-renesas-soc, linux-media, devicetree, linux-kernel,
Mauro Carvalho Chehab, Kieran Bingham, Laurent Pinchart,
Jacopo Mondi, Niklas Söderlund, Mark Rutland, sakari.ailus,
Hans Verkuil, Laurent Pinchart, Jacopo Mondi,
Niklas Söderlund
Thanks Rob,
On 18/12/2019 18:13, Rob Herring wrote:
> On Wed, Dec 11, 2019 at 12:44:58PM +0000, Kieran Bingham wrote:
>> From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>>
>> The MAX9286 deserializes video data received on up to 4 Gigabit
>> Multimedia Serial Links (GMSL) and outputs them on a CSI-2 port using up
>> to 4 data lanes.
>>
>> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
>> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
>> ---
>> .../bindings/media/i2c/maxim,max9286.yaml | 289 ++++++++++++++++++
>> 1 file changed, 289 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
>
> A couple of nits, with those fixed:
I'll fix them up :-D
Thank you very much.
Converting this to YAML picked up a few issues in our DTS - so it
certainly seems very worthwhile!
--
Kieran
> Reviewed-by: Rob Herring <robh@kernel.org>
>
>>
>> diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
>> new file mode 100644
>> index 000000000000..d37ea2c432f6
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
>> @@ -0,0 +1,289 @@
>> +# SPDX-License-Identifier: GPL-2.0-only
>
> Dual license new bindings please:
>
> (GPL-2.0-only OR BSD-2-Clause)
That's two of those I've got to fix up for you :D. I'll make sure all
new ones I add have this correctly presented.
>> +# Copyright (C) 2019 Renesas Electronics Corp.
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/media/i2c/maxim,max9286.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Maxim Integrated Quad GMSL Deserializer
>> +
>> +maintainers:
>> + - Jacopo Mondi <jacopo+renesas@jmondi.org>
>> + - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>> + - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>> + - Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
>> +
>> +description: -|
>
> I usually see '|-', but I guess that works.
Oh, I'm happy to change to conform to whatever is the accepted norm...
>
>> + The MAX9286 deserializer receives video data on up to 4 Gigabit Multimedia
>> + Serial Links (GMSL) and outputs them on a CSI-2 D-PHY port using up to 4 data
>> + lanes.
>> +
>> + In addition to video data, the GMSL links carry a bidirectional control
>> + channel that encapsulates I2C messages. The MAX9286 forwards all I2C traffic
>> + not addressed to itself to the other side of the links, where a GMSL
>> + serializer will output it on a local I2C bus. In the other direction all I2C
>> + traffic received over GMSL by the MAX9286 is output on the local I2C bus.
>> +
>> +properties:
>> + '#address-cells':
>> + const: 1
>> +
>> + '#size-cells':
>> + const: 0
>> +
>> + compatible:
>> + const: maxim,max9286
>> +
>> + reg:
>> + description: I2C device address
>> + maxItems: 1
>> +
>> + poc-supply:
>> + description: Regulator providing Power over Coax to the cameras
>> + maxItems: 1
>> +
>> + enable-gpios:
>> + description: GPIO connected to the \#PWDN pin with inverted polarity
>> + maxItems: 1
>> +
>> + ports:
>> + type: object
>> + description: -|
>> + The connections to the MAX9286 GMSL and its endpoint nodes are modelled
>> + using the OF graph bindings in accordance with the video interface
>> + bindings defined in
>> + Documentation/devicetree/bindings/media/video-interfaces.txt.
>> +
>> + The following table lists the port number corresponding to each device
>> + port.
>> +
>> + Port Description
>> + ----------------------------------------
>> + Port 0 GMSL Input 0
>> + Port 1 GMSL Input 1
>> + Port 2 GMSL Input 2
>> + Port 3 GMSL Input 3
>> + Port 4 CSI-2 Output
>> +
>> + properties:
>> + '#address-cells':
>> + const: 1
>> +
>> + '#size-cells':
>> + const: 0
>> +
>> + port@[0-3]:
>> + type: object
>> + properties:
>> + reg:
>> + enum: [ 0, 1, 2, 3 ]
>> +
>> + endpoint:
>> + type: object
>> +
>> + properties:
>> + remote-endpoint:
>> + description: -|
>> + phandle to the remote GMSL source endpoint subnode in the
>> + remote node port.
>> + maxItems: 1
>
> This is not an array. You can just drop and assume it has a type defined
> elsewhere.
>
Will fix and validate.
>> +
>> + required:
>> + - remote-endpoint
>> +
>> + required:
>> + - reg
>> + - endpoint
>> +
>> + additionalProperties: false
>> +
>> + port@4:
>> + type: object
>> + properties:
>> + reg:
>> + const: 4
>> +
>> + endpoint:
>> + type: object
>> +
>> + properties:
>> + remote-endpoint:
>> + description: phandle to the remote CSI-2 sink endpoint.
>> + maxItems: 1
>
> And here.
Likewise.
>
>> +
>> + data-lanes:
>> + description: array of physical CSI-2 data lane indexes.
>> +
>> + required:
>> + - remote-endpoint
>> + - data-lanes
>> +
>> + required:
>> + - reg
>> + - endpoint
>> +
>> + additionalProperties: false
>> +
>> + required:
>> + - port@4
>> +
>> + i2c-mux:
>> + type: object
>> + description: -|
>> + Each GMSL link is modelled as a child bus of an i2c bus
>> + multiplexer/switch, in accordance with bindings described in
>> + Documentation/devicetree/bindings/i2c/i2c-mux.txt. The serializer
>> + device on the remote end of the GMSL link shall be modelled as a child
>> + node of the corresponding I2C bus.
>> +
>> + properties:
>> + '#address-cells':
>> + const: 1
>> +
>> + '#size-cells':
>> + const: 0
>> +
>> + additionalProperties: false
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - ports
>> + - i2c-mux
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/gpio/gpio.h>
>> +
>> + i2c@e66d8000 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + reg = <0 0xe66d8000 0 0x40>;
>> +
>> + gmsl-deserializer@2c {
>> + compatible = "maxim,max9286";
>> + reg = <0x2c>;
>> + poc-supply = <&camera_poc_12v>;
>> + enable-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
>> +
>> + ports {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + port@0 {
>> + reg = <0>;
>> +
>> + max9286_in0: endpoint {
>> + remote-endpoint = <&rdacm20_out0>;
>> + };
>> + };
>> +
>> + port@1 {
>> + reg = <1>;
>> +
>> + max9286_in1: endpoint {
>> + remote-endpoint = <&rdacm20_out1>;
>> + };
>> + };
>> +
>> + port@2 {
>> + reg = <2>;
>> +
>> + max9286_in2: endpoint {
>> + remote-endpoint = <&rdacm20_out2>;
>> + };
>> + };
>> +
>> + port@3 {
>> + reg = <3>;
>> +
>> + max9286_in3: endpoint {
>> + remote-endpoint = <&rdacm20_out3>;
>> + };
>> + };
>> +
>> + port@4 {
>> + reg = <4>;
>> +
>> + max9286_out: endpoint {
>> + data-lanes = <1 2 3 4>;
>> + remote-endpoint = <&csi40_in>;
>> + };
>> + };
>> + };
>> +
>> + i2c-mux {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + i2c@0 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + reg = <0>;
>> +
>> + camera@51 {
>> + reg = <0x51>;
>> +
>> + port {
>> + rdacm20_out0: endpoint {
>> + remote-endpoint = <&max9286_in0>;
>> + };
>> + };
>> +
>> + };
>> + };
>> +
>> + i2c@1 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + reg = <1>;
>> +
>> + camera@52 {
>> + reg = <0x52>;
>> +
>> + port {
>> + rdacm20_out1: endpoint {
>> + remote-endpoint = <&max9286_in1>;
>> + };
>> + };
>> + };
>> + };
>> +
>> + i2c@2 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + reg = <2>;
>> +
>> + camera@53 {
>> + reg = <0x53>;
>> +
>> + port {
>> + rdacm20_out2: endpoint {
>> + remote-endpoint = <&max9286_in2>;
>> + };
>> + };
>> + };
>> + };
>> +
>> + i2c@3 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + reg = <3>;
>> +
>> + camera@54 {
>> + reg = <0x54>;
>> +
>> + port {
>> + rdacm20_out3: endpoint {
>> + remote-endpoint = <&max9286_in3>;
>> + };
>> + };
>> + };
>> + };
>> + };
>> + };
>> + };
>> --
>> 2.20.1
>>
--
Regards
--
Kieran
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2019-12-19 11:46 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-12-11 12:44 [PATCH v6 0/2] MAX9286 GMSL Support Kieran Bingham
2019-12-11 12:44 ` [PATCH v6 1/2] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286 Kieran Bingham
2019-12-18 18:13 ` Rob Herring
2019-12-19 11:46 ` Kieran Bingham
2019-12-11 12:44 ` [PATCH v6 2/2] media: i2c: Add MAX9286 driver Kieran Bingham
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