[PATCH v10 0/4] Synopsys DesignWare HDMI Video Capture Controller + PHY

[PATCH v10 0/4] Synopsys DesignWare HDMI Video Capture Controller + PHY

[Jose Abreu]

The Synopsys DesignWare HDMI RX controller is an HDMI receiver controller that
is responsible to process digital data that comes from a phy. The final result
is a stream of RAW video data that can then be connected to a video DMA, for
example, and transfered into RAM so that it can be displayed.

The controller + phy available in this series natively support all HDMI 1.4 and
HDMI 2.0 modes, including deep color. Although, the driver is quite in its
initial stage and unfortunatelly only non deep color modes are supported. Also,
audio is not yet supported in the driver (the controller has several audio
output interfaces).

Version 10 addresses review comments from Hans Verkuil and from Philippe
Ombredanne.

This series was tested in a FPGA platform using an embedded platform called
ARC AXS101.

Jose Abreu (4):
  dt-bindings: media: Document Synopsys DesignWare HDMI RX
  MAINTAINERS: Add entry for Synopsys DesignWare HDMI drivers
  [media] platform: Add Synopsys DesignWare HDMI RX PHY e405 Driver
  [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

 .../devicetree/bindings/media/snps,dw-hdmi-rx.txt  |   58 +
 MAINTAINERS                                        |    7 +
 drivers/media/platform/Kconfig                     |    2 +
 drivers/media/platform/Makefile                    |    2 +
 drivers/media/platform/dwc/Kconfig                 |   23 +
 drivers/media/platform/dwc/Makefile                |    2 +
 drivers/media/platform/dwc/dw-hdmi-phy-e405.c      |  822 +++++++++
 drivers/media/platform/dwc/dw-hdmi-phy-e405.h      |   41 +
 drivers/media/platform/dwc/dw-hdmi-rx.c            | 1840 ++++++++++++++++++++
 drivers/media/platform/dwc/dw-hdmi-rx.h            |  419 +++++
 include/media/dwc/dw-hdmi-phy-pdata.h              |  106 ++
 include/media/dwc/dw-hdmi-rx-pdata.h               |   48 +
 12 files changed, 3370 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt
 create mode 100644 drivers/media/platform/dwc/Kconfig
 create mode 100644 drivers/media/platform/dwc/Makefile
 create mode 100644 drivers/media/platform/dwc/dw-hdmi-phy-e405.c
 create mode 100644 drivers/media/platform/dwc/dw-hdmi-phy-e405.h
 create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.c
 create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.h
 create mode 100644 include/media/dwc/dw-hdmi-phy-pdata.h
 create mode 100644 include/media/dwc/dw-hdmi-rx-pdata.h

-- 
1.9.1

[PATCH v10 1/4] dt-bindings: media: Document Synopsys DesignWare HDMI RX

[Jose Abreu]

Document the bindings for the Synopsys DesignWare HDMI RX.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Acked-by: Rob Herring <robh@kernel.org> (v8)
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Sylwester Nawrocki <snawrocki@kernel.org>
Cc: devicetree@vger.kernel.org
---
Changes from v7:
	- Remove SoC specific bindings (Rob)
Changes from v6:
	- Document which properties are required/optional (Sylwester)
	- Drop compatible string for SoC (Sylwester)
	- Reword edid-phandle property (Sylwester)
	- Typo fixes (Sylwester)
Changes from v4:
	- Use "cfg" instead of "cfg-clk" (Rob)
	- Change node names (Rob)
Changes from v3:
	- Document the new DT bindings suggested by Sylwester
Changes from v2:
	- Document edid-phandle property
---
 .../devicetree/bindings/media/snps,dw-hdmi-rx.txt  | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt

diff --git a/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt
new file mode 100644
index 0000000..1dc09c6
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt
@@ -0,0 +1,58 @@
+Synopsys DesignWare HDMI RX Decoder
+===================================
+
+This document defines device tree properties for the Synopsys DesignWare HDMI
+RX Decoder (DWC HDMI RX).
+
+The properties bellow belong to the Synopsys DesignWare HDMI RX Decoder node.
+
+Required properties:
+
+- compatible: Shall be "snps,dw-hdmi-rx".
+- reg: Memory mapped base address and length of the DWC HDMI RX registers.
+- interrupts: Reference to the DWC HDMI RX interrupt and the HDMI 5V sense
+interrupt.
+- clocks: Reference to the config clock.
+- clock-names: Shall be "cfg".
+- #address-cells: Shall be 1.
+- #size-cells: Shall be 0.
+
+Optional properties:
+
+- edid-phandle: Reference to the EDID handler block; if this property is not
+specified it is assumed that EDID is handled by device described by parent
+node of the HDMI RX node. You should not specify this property if your HDMI RX
+controller does not have CEC.
+
+You also have to create a subnode for the PHY device. PHY node properties are
+as follows.
+
+Required properties:
+
+- compatible: Shall be "snps,dw-hdmi-phy-e405".
+- reg: Shall be the JTAG address of the PHY.
+- clocks: Reference to the config clock.
+- clock-names: Shall be "cfg".
+
+Example:
+
+hdmi_rx: hdmi-rx@0 {
+	compatible = "snps,dw-hdmi-rx";
+	reg = <0x0 0x10000>;
+	interrupts = <1 2>;
+	edid-phandle = <&dw_hdmi_edid>;
+
+	clocks = <&dw_hdmi_refclk>;
+	clock-names = "cfg";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	hdmi-phy@fc {
+		compatible = "snps,dw-hdmi-phy-e405";
+		reg = <0xfc>;
+
+		clocks = <&dw_hdmi_refclk>;
+		clock-names = "cfg";
+	};
+};
-- 
1.9.1

[PATCH v10 2/4] MAINTAINERS: Add entry for Synopsys DesignWare HDMI drivers

[Jose Abreu]

Add an entry for Synopsys DesignWare HDMI Receivers drivers
and phys.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Joao Pinto <jpinto@synopsys.com>
---
 MAINTAINERS | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 7a52a66..a1675bc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13108,6 +13108,13 @@ L:	netdev@vger.kernel.org
 S:	Supported
 F:	drivers/net/ethernet/synopsys/
 
+SYNOPSYS DESIGNWARE HDMI RECEIVERS AND PHY DRIVERS
+M:	Jose Abreu <joabreu@synopsys.com>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+F:	drivers/media/platform/dwc/*
+F:	include/media/dwc/*
+
 SYNOPSYS DESIGNWARE I2C DRIVER
 M:	Jarkko Nikula <jarkko.nikula@linux.intel.com>
 R:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
-- 
1.9.1

[PATCH v10 3/4] [media] platform: Add Synopsys DesignWare HDMI RX PHY e405 Driver

[Jose Abreu]

This adds support for the Synopsys DesignWare HDMI RX PHY e405. This
phy receives and decodes HDMI video that is delivered to a controller.

Main features included in this driver are:
	- Equalizer algorithm that chooses the phy best settings
	according to the detected HDMI cable characteristics.
	- Support for scrambling
	- Support for HDMI 2.0 modes up to 6G (HDMI 4k@60Hz).

The driver was implemented as a standalone V4L2 subdevice and the
phy interface with the controller was implemented using V4L2 ioctls. I
do not know if this is the best option but it is not possible to use the
existing API functions directly as we need specific functions that will
be called by the controller at specific configuration stages.

There is also a bidirectional communication between controller and phy:
The phy must provide functions that the controller will call (i.e.
configuration functions) and the controller must provide read/write
callbacks, as well as other specific functions.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Sylwester Nawrocki <snawrocki@kernel.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
---
Changes from v9:
	- Use SPDX License ID (Philippe)
Changes from v4:
	- Use usleep_range (Sylwester)
	- Remove some comments (Sylwester)
	- Parse phy version from of_device_id (Sylwester)
	- Use "cfg" instead of "cfg-clk" (Sylwester, Rob)
	- Change some messages to dev_dbg (Sylwester)
Changes from v3:
	- Use v4l2 async API (Sylwester)
	- Use clock API (Sylwester)
	- Add compatible string (Sylwester)
Changes from RFC:
	- Remove a bunch of functions that can be collapsed into
	a single config() function
	- Add comments for the callbacks and structures (Hans)
---
 drivers/media/platform/Kconfig                |   2 +
 drivers/media/platform/Makefile               |   2 +
 drivers/media/platform/dwc/Kconfig            |   8 +
 drivers/media/platform/dwc/Makefile           |   1 +
 drivers/media/platform/dwc/dw-hdmi-phy-e405.c | 822 ++++++++++++++++++++++++++
 drivers/media/platform/dwc/dw-hdmi-phy-e405.h |  41 ++
 include/media/dwc/dw-hdmi-phy-pdata.h         | 106 ++++
 7 files changed, 982 insertions(+)
 create mode 100644 drivers/media/platform/dwc/Kconfig
 create mode 100644 drivers/media/platform/dwc/Makefile
 create mode 100644 drivers/media/platform/dwc/dw-hdmi-phy-e405.c
 create mode 100644 drivers/media/platform/dwc/dw-hdmi-phy-e405.h
 create mode 100644 include/media/dwc/dw-hdmi-phy-pdata.h

diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index fd0c998..0187cbd 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -33,6 +33,8 @@ source "drivers/media/platform/omap/Kconfig"
 
 source "drivers/media/platform/blackfin/Kconfig"
 
+source "drivers/media/platform/dwc/Kconfig"
+
 config VIDEO_SH_VOU
 	tristate "SuperH VOU video output driver"
 	depends on MEDIA_CAMERA_SUPPORT
diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
index 003b0bb..2e879c6 100644
--- a/drivers/media/platform/Makefile
+++ b/drivers/media/platform/Makefile
@@ -97,3 +97,5 @@ obj-$(CONFIG_VIDEO_QCOM_CAMSS)		+= qcom/camss-8x16/
 obj-$(CONFIG_VIDEO_QCOM_VENUS)		+= qcom/venus/
 
 obj-y					+= meson/
+
+obj-y					+= dwc/
diff --git a/drivers/media/platform/dwc/Kconfig b/drivers/media/platform/dwc/Kconfig
new file mode 100644
index 0000000..361d38d
--- /dev/null
+++ b/drivers/media/platform/dwc/Kconfig
@@ -0,0 +1,8 @@
+config VIDEO_DWC_HDMI_PHY_E405
+	tristate "Synopsys Designware HDMI RX PHY e405 driver"
+	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+	help
+	  Support for Synopsys Designware HDMI RX PHY. Version is e405.
+
+	  To compile this driver as a module, choose M here. The module
+	  will be called dw-hdmi-phy-e405.
diff --git a/drivers/media/platform/dwc/Makefile b/drivers/media/platform/dwc/Makefile
new file mode 100644
index 0000000..fc3b62c
--- /dev/null
+++ b/drivers/media/platform/dwc/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_VIDEO_DWC_HDMI_PHY_E405) += dw-hdmi-phy-e405.o
diff --git a/drivers/media/platform/dwc/dw-hdmi-phy-e405.c b/drivers/media/platform/dwc/dw-hdmi-phy-e405.c
new file mode 100644
index 0000000..e781cc1
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-hdmi-phy-e405.c
@@ -0,0 +1,822 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// Copyright (c) 2017 Synopsys, Inc. and/or its affiliates.
+// Synopsys DesignWare HDMI PHY e405 driver
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-subdev.h>
+#include <media/dwc/dw-hdmi-phy-pdata.h>
+#include "dw-hdmi-phy-e405.h"
+
+MODULE_AUTHOR("Jose Abreu <joabreu@synopsys.com>");
+MODULE_DESCRIPTION("Designware HDMI PHY e405 driver");
+MODULE_LICENSE("Dual MIT/GPL");
+
+#define PHY_EQ_WAIT_TIME_START			3
+#define PHY_EQ_SLEEP_TIME_CDR			30
+#define PHY_EQ_SLEEP_TIME_ACQ			1
+#define PHY_EQ_BOUNDSPREAD			20
+#define PHY_EQ_MIN_ACQ_STABLE			3
+#define PHY_EQ_ACC_LIMIT			360
+#define PHY_EQ_ACC_MIN_LIMIT			0
+#define PHY_EQ_MAX_SETTING			13
+#define PHY_EQ_SHORT_CABLE_SETTING		4
+#define PHY_EQ_ERROR_CABLE_SETTING		4
+#define PHY_EQ_MIN_SLOPE			50
+#define PHY_EQ_AVG_ACQ				5
+#define PHY_EQ_MINMAX_NTRIES			3
+#define PHY_EQ_EQUALIZED_COUNTER_VAL		512
+#define PHY_EQ_EQUALIZED_COUNTER_VAL_HDMI20	512
+#define PHY_EQ_MINMAX_MAXDIFF			4
+#define PHY_EQ_MINMAX_MAXDIFF_HDMI20		2
+#define PHY_EQ_FATBIT_MASK			0x0000
+#define PHY_EQ_FATBIT_MASK_4K			0x0c03
+#define PHY_EQ_FATBIT_MASK_HDMI20		0x0e03
+
+struct dw_phy_eq_ch {
+	u16 best_long_setting;
+	u8 valid_long_setting;
+	u16 best_short_setting;
+	u8 valid_short_setting;
+	u16 best_setting;
+	u16 acc;
+	u16 acq;
+	u16 last_acq;
+	u16 upper_bound_acq;
+	u16 lower_bound_acq;
+	u16 out_bound_acq;
+	u16 read_acq;
+};
+
+static const struct dw_phy_mpll_config {
+	u16 addr;
+	u16 val;
+} dw_phy_e405_mpll_cfg[] = {
+	{ 0x27, 0x1B94 },
+	{ 0x28, 0x16D2 },
+	{ 0x29, 0x12D9 },
+	{ 0x2A, 0x3249 },
+	{ 0x2B, 0x3653 },
+	{ 0x2C, 0x3436 },
+	{ 0x2D, 0x124D },
+	{ 0x2E, 0x0001 },
+	{ 0xCE, 0x0505 },
+	{ 0xCF, 0x0505 },
+	{ 0xD0, 0x0000 },
+	{ 0x00, 0x0000 },
+};
+
+struct dw_phy_dev {
+	struct device *dev;
+	struct dw_phy_pdata *config;
+	unsigned int version;
+	struct clk *clk;
+	u16 cfg_clk;
+	bool phy_enabled;
+	struct v4l2_subdev sd;
+	u16 mpll_status;
+	unsigned char color_depth;
+	bool hdmi2;
+	bool scrambling;
+	struct mutex lock;
+};
+
+static inline struct dw_phy_dev *to_dw_dev(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct dw_phy_dev, sd);
+}
+
+static void phy_write(struct dw_phy_dev *dw_dev, u16 val, u16 addr)
+{
+	void *arg = dw_dev->config->funcs_arg;
+
+	dw_dev->config->funcs->write(arg, val, addr);
+}
+
+static u16 phy_read(struct dw_phy_dev *dw_dev, u16 addr)
+{
+	void *arg = dw_dev->config->funcs_arg;
+
+	return dw_dev->config->funcs->read(arg, addr);
+}
+
+static void phy_reset(struct dw_phy_dev *dw_dev, int enable)
+{
+	void *arg = dw_dev->config->funcs_arg;
+
+	dw_dev->config->funcs->reset(arg, enable);
+}
+
+static void phy_pddq(struct dw_phy_dev *dw_dev, int enable)
+{
+	void *arg = dw_dev->config->funcs_arg;
+
+	dw_dev->config->funcs->pddq(arg, enable);
+}
+
+static void phy_svsmode(struct dw_phy_dev *dw_dev, int enable)
+{
+	void *arg = dw_dev->config->funcs_arg;
+
+	dw_dev->config->funcs->svsmode(arg, enable);
+}
+
+static void phy_zcal_reset(struct dw_phy_dev *dw_dev)
+{
+	void *arg = dw_dev->config->funcs_arg;
+
+	dw_dev->config->funcs->zcal_reset(arg);
+}
+
+static bool phy_zcal_done(struct dw_phy_dev *dw_dev)
+{
+	void *arg = dw_dev->config->funcs_arg;
+
+	return dw_dev->config->funcs->zcal_done(arg);
+}
+
+static bool phy_tmds_valid(struct dw_phy_dev *dw_dev)
+{
+	void *arg = dw_dev->config->funcs_arg;
+
+	return dw_dev->config->funcs->tmds_valid(arg);
+}
+
+static int dw_phy_eq_test(struct dw_phy_dev *dw_dev,
+		u16 *fat_bit_mask, int *min_max_length)
+{
+	u16 main_fsm_status, val;
+	int i;
+
+	for (i = 0; i < PHY_EQ_WAIT_TIME_START; i++) {
+		main_fsm_status = phy_read(dw_dev, PHY_MAINFSM_STATUS1);
+		if (main_fsm_status & 0x100)
+			break;
+		mdelay(PHY_EQ_SLEEP_TIME_CDR);
+	}
+
+	if (i == PHY_EQ_WAIT_TIME_START) {
+		dev_dbg(dw_dev->dev, "phy start conditions not achieved\n");
+		return -ETIMEDOUT;
+	}
+
+	if (main_fsm_status & 0x400) {
+		dev_dbg(dw_dev->dev, "invalid pll rate\n");
+		return -EINVAL;
+	}
+
+	val = (phy_read(dw_dev, PHY_CDR_CTRL_CNT) & 0x300) >> 8;
+	if (val == 0x1) {
+		/* HDMI 2.0 */
+		*fat_bit_mask = PHY_EQ_FATBIT_MASK_HDMI20;
+		*min_max_length = PHY_EQ_MINMAX_MAXDIFF_HDMI20;
+		dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 2.0 values\n");
+	} else if (!(main_fsm_status & 0x600)) {
+		/* HDMI 1.4 (pll rate = 0) */
+		*fat_bit_mask = PHY_EQ_FATBIT_MASK_4K;
+		*min_max_length = PHY_EQ_MINMAX_MAXDIFF;
+		dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 1.4@4k values\n");
+	} else {
+		/* HDMI 1.4 */
+		*fat_bit_mask = PHY_EQ_FATBIT_MASK;
+		*min_max_length = PHY_EQ_MINMAX_MAXDIFF;
+		dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 1.4 values\n");
+	}
+
+	return 0;
+}
+
+static void dw_phy_eq_default(struct dw_phy_dev *dw_dev)
+{
+	phy_write(dw_dev, 0x08A8, PHY_CH0_EQ_CTRL1);
+	phy_write(dw_dev, 0x0020, PHY_CH0_EQ_CTRL2);
+	phy_write(dw_dev, 0x08A8, PHY_CH1_EQ_CTRL1);
+	phy_write(dw_dev, 0x0020, PHY_CH1_EQ_CTRL2);
+	phy_write(dw_dev, 0x08A8, PHY_CH2_EQ_CTRL1);
+	phy_write(dw_dev, 0x0020, PHY_CH2_EQ_CTRL2);
+}
+
+static void dw_phy_eq_single(struct dw_phy_dev *dw_dev)
+{
+	phy_write(dw_dev, 0x0211, PHY_CH0_EQ_CTRL1);
+	phy_write(dw_dev, 0x0211, PHY_CH1_EQ_CTRL1);
+	phy_write(dw_dev, 0x0211, PHY_CH2_EQ_CTRL1);
+}
+
+static void dw_phy_eq_equal_setting(struct dw_phy_dev *dw_dev,
+		u16 lock_vector)
+{
+	phy_write(dw_dev, lock_vector, PHY_CH0_EQ_CTRL4);
+	phy_write(dw_dev, 0x0024, PHY_CH0_EQ_CTRL2);
+	phy_write(dw_dev, 0x0026, PHY_CH0_EQ_CTRL2);
+	phy_read(dw_dev, PHY_CH0_EQ_STATUS2);
+	phy_write(dw_dev, lock_vector, PHY_CH1_EQ_CTRL4);
+	phy_write(dw_dev, 0x0024, PHY_CH1_EQ_CTRL2);
+	phy_write(dw_dev, 0x0026, PHY_CH1_EQ_CTRL2);
+	phy_read(dw_dev, PHY_CH1_EQ_STATUS2);
+	phy_write(dw_dev, lock_vector, PHY_CH2_EQ_CTRL4);
+	phy_write(dw_dev, 0x0024, PHY_CH2_EQ_CTRL2);
+	phy_write(dw_dev, 0x0026, PHY_CH2_EQ_CTRL2);
+	phy_read(dw_dev, PHY_CH2_EQ_STATUS2);
+}
+
+static void dw_phy_eq_equal_setting_ch0(struct dw_phy_dev *dw_dev,
+		u16 lock_vector)
+{
+	phy_write(dw_dev, lock_vector, PHY_CH0_EQ_CTRL4);
+	phy_write(dw_dev, 0x0024, PHY_CH0_EQ_CTRL2);
+	phy_write(dw_dev, 0x0026, PHY_CH0_EQ_CTRL2);
+	phy_read(dw_dev, PHY_CH0_EQ_STATUS2);
+}
+
+static void dw_phy_eq_equal_setting_ch1(struct dw_phy_dev *dw_dev,
+		u16 lock_vector)
+{
+	phy_write(dw_dev, lock_vector, PHY_CH1_EQ_CTRL4);
+	phy_write(dw_dev, 0x0024, PHY_CH1_EQ_CTRL2);
+	phy_write(dw_dev, 0x0026, PHY_CH1_EQ_CTRL2);
+	phy_read(dw_dev, PHY_CH1_EQ_STATUS2);
+}
+
+static void dw_phy_eq_equal_setting_ch2(struct dw_phy_dev *dw_dev,
+		u16 lock_vector)
+{
+	phy_write(dw_dev, lock_vector, PHY_CH2_EQ_CTRL4);
+	phy_write(dw_dev, 0x0024, PHY_CH2_EQ_CTRL2);
+	phy_write(dw_dev, 0x0026, PHY_CH2_EQ_CTRL2);
+	phy_read(dw_dev, PHY_CH2_EQ_STATUS2);
+}
+
+static void dw_phy_eq_auto_calib(struct dw_phy_dev *dw_dev)
+{
+	phy_write(dw_dev, 0x1809, PHY_MAINFSM_CTRL);
+	phy_write(dw_dev, 0x1819, PHY_MAINFSM_CTRL);
+	phy_write(dw_dev, 0x1809, PHY_MAINFSM_CTRL);
+}
+
+static void dw_phy_eq_init_vars(struct dw_phy_eq_ch *ch)
+{
+	ch->acc = 0;
+	ch->acq = 0;
+	ch->last_acq = 0;
+	ch->valid_long_setting = 0;
+	ch->valid_short_setting = 0;
+	ch->best_setting = PHY_EQ_SHORT_CABLE_SETTING;
+}
+
+static bool dw_phy_eq_acquire_early_cnt(struct dw_phy_dev *dw_dev,
+		u16 setting, u16 acq, struct dw_phy_eq_ch *ch0,
+		struct dw_phy_eq_ch *ch1, struct dw_phy_eq_ch *ch2)
+{
+	u16 lock_vector = 0x1;
+	int i;
+
+	lock_vector <<= setting;
+	ch0->out_bound_acq = 0;
+	ch1->out_bound_acq = 0;
+	ch2->out_bound_acq = 0;
+	ch0->acq = 0;
+	ch1->acq = 0;
+	ch2->acq = 0;
+
+	dw_phy_eq_equal_setting(dw_dev, lock_vector);
+	dw_phy_eq_auto_calib(dw_dev);
+
+	mdelay(PHY_EQ_SLEEP_TIME_CDR);
+	if (!phy_tmds_valid(dw_dev))
+		dev_dbg(dw_dev->dev, "TMDS is NOT valid\n");
+
+	ch0->read_acq = phy_read(dw_dev, PHY_CH0_EQ_STATUS3);
+	ch1->read_acq = phy_read(dw_dev, PHY_CH1_EQ_STATUS3);
+	ch2->read_acq = phy_read(dw_dev, PHY_CH2_EQ_STATUS3);
+
+	ch0->acq += ch0->read_acq;
+	ch1->acq += ch1->read_acq;
+	ch2->acq += ch2->read_acq;
+
+	ch0->upper_bound_acq = ch0->read_acq + PHY_EQ_BOUNDSPREAD;
+	ch0->lower_bound_acq = ch0->read_acq - PHY_EQ_BOUNDSPREAD;
+	ch1->upper_bound_acq = ch1->read_acq + PHY_EQ_BOUNDSPREAD;
+	ch1->lower_bound_acq = ch1->read_acq - PHY_EQ_BOUNDSPREAD;
+	ch2->upper_bound_acq = ch2->read_acq + PHY_EQ_BOUNDSPREAD;
+	ch2->lower_bound_acq = ch2->read_acq - PHY_EQ_BOUNDSPREAD;
+
+	for (i = 1; i < acq; i++) {
+		dw_phy_eq_auto_calib(dw_dev);
+		mdelay(PHY_EQ_SLEEP_TIME_ACQ);
+
+		if ((ch0->read_acq > ch0->upper_bound_acq) ||
+				(ch0->read_acq < ch0->lower_bound_acq))
+			ch0->out_bound_acq++;
+		if ((ch1->read_acq > ch1->upper_bound_acq) ||
+				(ch1->read_acq < ch1->lower_bound_acq))
+			ch1->out_bound_acq++;
+		if ((ch2->read_acq > ch2->upper_bound_acq) ||
+				(ch2->read_acq < ch1->lower_bound_acq))
+			ch2->out_bound_acq++;
+
+		if (i == PHY_EQ_MIN_ACQ_STABLE) {
+			if ((ch0->out_bound_acq == 0) &&
+					(ch1->out_bound_acq == 0) &&
+					(ch2->out_bound_acq == 0)) {
+				acq = 3;
+				break;
+			}
+		}
+
+		ch0->read_acq = phy_read(dw_dev, PHY_CH0_EQ_STATUS3);
+		ch1->read_acq = phy_read(dw_dev, PHY_CH1_EQ_STATUS3);
+		ch2->read_acq = phy_read(dw_dev, PHY_CH2_EQ_STATUS3);
+
+		ch0->acq += ch0->read_acq;
+		ch1->acq += ch1->read_acq;
+		ch2->acq += ch2->read_acq;
+	}
+
+	ch0->acq = ch0->acq / acq;
+	ch1->acq = ch1->acq / acq;
+	ch2->acq = ch2->acq / acq;
+
+	return true;
+}
+
+static int dw_phy_eq_test_type(u16 setting, bool tmds_valid,
+		struct dw_phy_eq_ch *ch)
+{
+	u16 step_slope = 0;
+
+	if ((ch->acq < ch->last_acq) && tmds_valid) {
+		/* Long cable equalization */
+		ch->acc += ch->last_acq - ch->acq;
+		if ((ch->valid_long_setting == 0) && (ch->acq < 512) &&
+				(ch->acc > 0)) {
+			ch->best_long_setting = setting;
+			ch->valid_long_setting = 1;
+		}
+		step_slope = ch->last_acq - ch->acq;
+	}
+
+	if (tmds_valid && (ch->valid_short_setting == 0)) {
+		/* Short cable equalization */
+		if ((setting < PHY_EQ_SHORT_CABLE_SETTING) &&
+				(ch->acq < PHY_EQ_EQUALIZED_COUNTER_VAL)) {
+			ch->best_short_setting= setting;
+			ch->valid_short_setting = 1;
+		}
+
+		if (setting == PHY_EQ_SHORT_CABLE_SETTING) {
+			ch->best_short_setting = PHY_EQ_SHORT_CABLE_SETTING;
+			ch->valid_short_setting = 1;
+		}
+	}
+
+	if (ch->valid_long_setting && (ch->acc > PHY_EQ_ACC_LIMIT)) {
+		ch->best_setting = ch->best_long_setting;
+		return 1;
+	}
+
+	if ((setting == PHY_EQ_MAX_SETTING) && (ch->acc < PHY_EQ_ACC_LIMIT) &&
+			ch->valid_short_setting) {
+		ch->best_setting = ch->best_short_setting;
+		return 2;
+	}
+
+	if ((setting == PHY_EQ_MAX_SETTING) && tmds_valid &&
+			(ch->acc > PHY_EQ_ACC_LIMIT) &&
+			(step_slope > PHY_EQ_MIN_SLOPE)) {
+		ch->best_setting = PHY_EQ_MAX_SETTING;
+		return 3;
+	}
+
+	if (setting == PHY_EQ_MAX_SETTING) {
+		ch->best_setting = PHY_EQ_ERROR_CABLE_SETTING;
+		return 255;
+	}
+
+	return 0;
+}
+
+static bool dw_phy_eq_setting_finder(struct dw_phy_dev *dw_dev, u16 acq,
+		struct dw_phy_eq_ch *ch0, struct dw_phy_eq_ch *ch1,
+		struct dw_phy_eq_ch *ch2)
+{
+	u16 act = 0;
+	int ret_ch0 = 0, ret_ch1 = 0, ret_ch2 = 0;
+	bool tmds_valid = false;
+
+	dw_phy_eq_init_vars(ch0);
+	dw_phy_eq_init_vars(ch1);
+	dw_phy_eq_init_vars(ch2);
+
+	tmds_valid = dw_phy_eq_acquire_early_cnt(dw_dev, act, acq,
+			ch0, ch1, ch2);
+
+	while ((ret_ch0 == 0) || (ret_ch1 == 0) || (ret_ch2 == 0)) {
+		act++;
+
+		ch0->last_acq = ch0->acq;
+		ch1->last_acq = ch1->acq;
+		ch2->last_acq = ch2->acq;
+
+		tmds_valid = dw_phy_eq_acquire_early_cnt(dw_dev, act, acq,
+				ch0, ch1, ch2);
+
+		if (!ret_ch0)
+			ret_ch0 = dw_phy_eq_test_type(act, tmds_valid, ch0);
+		if (!ret_ch1)
+			ret_ch1 = dw_phy_eq_test_type(act, tmds_valid, ch1);
+		if (!ret_ch2)
+			ret_ch2 = dw_phy_eq_test_type(act, tmds_valid, ch2);
+	}
+
+	if ((ret_ch0 == 255) || (ret_ch1 == 255) || (ret_ch2 == 255))
+		return false;
+	return true;
+}
+
+static bool dw_phy_eq_maxvsmin(u16 ch0_setting, u16 ch1_setting,
+		u16 ch2_setting, u16 min_max_length)
+{
+	u16 min = ch0_setting, max = ch0_setting;
+
+	if (ch1_setting > max)
+		max = ch1_setting;
+	if (ch2_setting > max)
+		max = ch2_setting;
+	if (ch1_setting < min)
+		min = ch1_setting;
+	if (ch2_setting < min)
+		min = ch2_setting;
+
+	if ((max - min) > min_max_length)
+		return false;
+	return true;
+}
+
+static int dw_phy_eq_init(struct dw_phy_dev *dw_dev, u16 acq, bool force)
+{
+	struct dw_phy_eq_ch ch0, ch1, ch2;
+	u16 fat_bit_mask, lock_vector = 0x1;
+	int min_max_length, i, ret = 0;
+	u16 mpll_status;
+
+	if (dw_dev->version < 401)
+		return ret;
+	if (!dw_dev->phy_enabled)
+		return -EINVAL;
+
+	mpll_status = phy_read(dw_dev, PHY_CLK_MPLL_STATUS);
+	if (mpll_status == dw_dev->mpll_status && !force)
+		return ret;
+	dw_dev->mpll_status = mpll_status;
+
+	phy_write(dw_dev, 0x00, PHY_MAINFSM_OVR2);
+	phy_write(dw_dev, 0x00, PHY_CH0_EQ_CTRL3);
+	phy_write(dw_dev, 0x00, PHY_CH1_EQ_CTRL3);
+	phy_write(dw_dev, 0x00, PHY_CH2_EQ_CTRL3);
+
+	ret = dw_phy_eq_test(dw_dev, &fat_bit_mask, &min_max_length);
+	if (ret) {
+		if (ret == -EINVAL) /* Means equalizer is not needed */
+			ret = 0;
+
+		/* Do not change values if we don't have clock */
+		if (ret != -ETIMEDOUT) {
+			dw_phy_eq_default(dw_dev);
+			phy_pddq(dw_dev, 1);
+			phy_pddq(dw_dev, 0);
+		}
+	} else {
+		dw_phy_eq_single(dw_dev);
+		dw_phy_eq_equal_setting(dw_dev, 0x0001);
+		phy_write(dw_dev, fat_bit_mask, PHY_CH0_EQ_CTRL6);
+		phy_write(dw_dev, fat_bit_mask, PHY_CH1_EQ_CTRL6);
+		phy_write(dw_dev, fat_bit_mask, PHY_CH2_EQ_CTRL6);
+
+		for (i = 0; i < PHY_EQ_MINMAX_NTRIES; i++) {
+			if (dw_phy_eq_setting_finder(dw_dev, acq,
+						&ch0, &ch1, &ch2)) {
+				if (dw_phy_eq_maxvsmin(ch0.best_setting,
+							ch1.best_setting,
+							ch2.best_setting,
+							min_max_length))
+					break;
+			}
+
+			ch0.best_setting = PHY_EQ_ERROR_CABLE_SETTING;
+			ch1.best_setting = PHY_EQ_ERROR_CABLE_SETTING;
+			ch2.best_setting = PHY_EQ_ERROR_CABLE_SETTING;
+		}
+
+		dev_dbg(dw_dev->dev, "equalizer settings: "
+				"ch0=0x%x, ch1=0x%x, ch1=0x%x\n",
+				ch0.best_setting, ch1.best_setting,
+				ch2.best_setting);
+
+		if (i == PHY_EQ_MINMAX_NTRIES)
+			ret = -EINVAL;
+
+		lock_vector = 0x1;
+		lock_vector <<= ch0.best_setting;
+		dw_phy_eq_equal_setting_ch0(dw_dev, lock_vector);
+
+		lock_vector = 0x1;
+		lock_vector <<= ch1.best_setting;
+		dw_phy_eq_equal_setting_ch1(dw_dev, lock_vector);
+
+		lock_vector = 0x1;
+		lock_vector <<= ch2.best_setting;
+		dw_phy_eq_equal_setting_ch2(dw_dev, lock_vector);
+
+		phy_pddq(dw_dev, 1);
+		phy_pddq(dw_dev, 0);
+	}
+
+	return ret;
+}
+
+static int dw_phy_config(struct dw_phy_dev *dw_dev, unsigned char color_depth,
+		bool hdmi2, bool scrambling)
+{
+	const struct dw_phy_mpll_config *mpll_cfg = dw_phy_e405_mpll_cfg;
+	struct device *dev = dw_dev->dev;
+	int timeout = 100;
+	u16 val, res_idx;
+	bool zcal_done;
+
+	dev_dbg(dev, "%s: color_depth=%d, hdmi2=%d, scrambling=%d, cfg_clk=%d\n",
+			__func__, color_depth, hdmi2, scrambling, dw_dev->cfg_clk);
+
+	switch (color_depth) {
+	case 8:
+		res_idx = 0x0;
+		break;
+	case 10:
+		res_idx = 0x1;
+		break;
+	case 12:
+		res_idx = 0x2;
+		break;
+	case 16:
+		res_idx = 0x3;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	phy_reset(dw_dev, 1);
+	phy_pddq(dw_dev, 1);
+	phy_svsmode(dw_dev, 1);
+
+	phy_zcal_reset(dw_dev);
+	do {
+		usleep_range(1000, 1100);
+		zcal_done = phy_zcal_done(dw_dev);
+	} while (!zcal_done && timeout--);
+
+	if (!zcal_done) {
+		dev_err(dw_dev->dev, "Zcal calibration failed\n");
+		return -ETIMEDOUT;
+	}
+
+	phy_reset(dw_dev, 0);
+
+	/* CMU */
+	val = (0x08 << 10) | (0x01 << 9);
+	val |= (dw_dev->cfg_clk * 4) & GENMASK(8, 0);
+	phy_write(dw_dev, val, PHY_CMU_CONFIG);
+
+	/* Color Depth and enable fast switching */
+	val = phy_read(dw_dev, PHY_SYSTEM_CONFIG);
+	val = (val & ~0x60) | (res_idx << 5) | BIT(11);
+	phy_write(dw_dev, val, PHY_SYSTEM_CONFIG);
+
+	/* MPLL */
+	for (; mpll_cfg->addr != 0x0; mpll_cfg++)
+		phy_write(dw_dev, mpll_cfg->val, mpll_cfg->addr);
+
+	/* Operation for data rates between 3.4Gbps and 6Gbps */
+	val = phy_read(dw_dev, PHY_CDR_CTRL_CNT);
+	if (hdmi2)
+		val |= BIT(8);
+	else
+		val &= ~BIT(8);
+	phy_write(dw_dev, val, PHY_CDR_CTRL_CNT);
+
+	/* Scrambling */
+	val = phy_read(dw_dev, PHY_OVL_PROT_CTRL);
+	if (scrambling)
+		val |= GENMASK(7,6);
+	else
+		val &= ~GENMASK(7,6);
+	phy_write(dw_dev, val, PHY_OVL_PROT_CTRL);
+
+	/* Enable phy */
+	phy_pddq(dw_dev, 0);
+
+	dw_dev->color_depth = color_depth;
+	dw_dev->hdmi2 = hdmi2;
+	dw_dev->scrambling = scrambling;
+	return 0;
+}
+
+static int dw_phy_enable(struct dw_phy_dev *dw_dev, unsigned char color_depth,
+		bool hdmi2, bool scrambling)
+{
+	int ret;
+
+	if (dw_dev->phy_enabled &&
+	    dw_dev->color_depth == color_depth &&
+	    dw_dev->hdmi2 == hdmi2 &&
+	    dw_dev->scrambling == scrambling)
+		return 0;
+
+	ret = dw_phy_config(dw_dev, color_depth, hdmi2, scrambling);
+	if (ret)
+		return ret;
+
+	phy_reset(dw_dev, 0);
+	phy_pddq(dw_dev, 0);
+	dw_dev->phy_enabled = true;
+	return 0;
+}
+
+static void dw_phy_disable(struct dw_phy_dev *dw_dev)
+{
+	if (!dw_dev->phy_enabled)
+		return;
+
+	phy_reset(dw_dev, 1);
+	phy_pddq(dw_dev, 1);
+	phy_svsmode(dw_dev, 0);
+	dw_dev->mpll_status = 0xFFFF;
+	dw_dev->phy_enabled = false;
+}
+
+static long dw_phy_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
+{
+	struct dw_phy_dev *dw_dev = to_dw_dev(sd);
+	struct dw_phy_config_command *ccmd;
+	struct dw_phy_eq_command *ecmd;
+	int ret = 0;
+
+	dev_dbg(dw_dev->dev, "%s: cmd=%d\n", __func__, cmd);
+
+	mutex_lock(&dw_dev->lock);
+	switch (cmd) {
+	case DW_PHY_IOCTL_EQ_INIT:
+		ecmd = (struct dw_phy_eq_command *)arg; 
+		ecmd->result = dw_phy_eq_init(dw_dev, ecmd->nacq, ecmd->force);
+		break;
+	case DW_PHY_IOCTL_CONFIG:
+		ccmd = (struct dw_phy_config_command *)arg;
+		ccmd->result = dw_phy_enable(dw_dev, ccmd->color_depth,
+				ccmd->hdmi2, ccmd->scrambling);
+		break;
+	default:
+		ret = -ENOIOCTLCMD;
+		break;
+	}
+	mutex_unlock(&dw_dev->lock);
+
+	return ret;
+}
+
+static int dw_phy_s_power(struct v4l2_subdev *sd, int on)
+{
+	struct dw_phy_dev *dw_dev = to_dw_dev(sd);
+
+	dev_dbg(dw_dev->dev, "%s: on=%d\n", __func__, on);
+
+	mutex_lock(&dw_dev->lock);
+	if (!on)
+		dw_phy_disable(dw_dev);
+	mutex_unlock(&dw_dev->lock);
+	return 0;
+}
+
+static const struct v4l2_subdev_core_ops dw_phy_core_ops = {
+	.ioctl = dw_phy_ioctl,
+	.s_power = dw_phy_s_power,
+};
+
+static const struct v4l2_subdev_ops dw_phy_sd_ops = {
+	.core = &dw_phy_core_ops,
+};
+
+struct dw_hdmi_phy_data {
+	const char *name;
+	unsigned int version;
+};
+
+static const struct dw_hdmi_phy_data dw_phy_e405_data = {
+	.name = "e405",
+	.version = 405,
+};
+
+static int dw_phy_probe(struct platform_device *pdev)
+{
+	struct dw_phy_pdata *pdata = pdev->dev.platform_data;
+	const struct dw_hdmi_phy_data *of_data;
+	struct device *dev = &pdev->dev;
+	struct dw_phy_dev *dw_dev;
+	struct v4l2_subdev *sd;
+	int ret;
+
+	dev_dbg(dev, "probe start\n");
+
+	dw_dev = devm_kzalloc(dev, sizeof(*dw_dev), GFP_KERNEL);
+	if (!dw_dev)
+		return -ENOMEM;
+
+	if (!pdata) {
+		dev_err(dev, "no platform data suplied\n");
+		return -EINVAL;
+	}
+
+	of_data = of_device_get_match_data(dev);
+	if (!of_data) {
+		dev_err(dev, "no valid phy configuration available\n");
+		return -EINVAL;
+	}
+
+	dw_dev->dev = dev;
+	dw_dev->config = pdata;
+	dw_dev->version = of_data->version;
+	mutex_init(&dw_dev->lock);
+
+	dw_dev->clk = devm_clk_get(dev, "cfg");
+	if (IS_ERR(dw_dev->clk)) {
+		dev_err(dev, "failed to get cfg clock\n");
+		return PTR_ERR(dw_dev->clk);
+	}
+
+	ret = clk_prepare_enable(dw_dev->clk);
+	if (ret) {
+		dev_err(dev, "failed to enable cfg clock\n");
+		return ret;
+	}
+
+	dw_dev->cfg_clk = clk_get_rate(dw_dev->clk) / 1000000U;
+	if (!dw_dev->cfg_clk) {
+		dev_err(dev, "invalid cfg clock frequency\n");
+		ret = -EINVAL;
+		goto err_clk;
+	}
+
+	/* V4L2 initialization */
+	sd = &dw_dev->sd;
+	v4l2_subdev_init(sd, &dw_phy_sd_ops);
+	strlcpy(sd->name, dev_name(dev), sizeof(sd->name));
+	sd->dev = dev;
+
+	/* Force phy disabling */
+	dw_dev->phy_enabled = true;
+	dw_phy_disable(dw_dev);
+
+	ret = v4l2_async_register_subdev(sd);
+	if (ret) {
+		dev_err(dev, "failed to register subdev\n");
+		goto err_clk;
+	}
+
+	dev_set_drvdata(dev, sd);
+	dev_dbg(dev, "driver probed (name=%s, cfg clock=%d)\n",
+			of_data->name, dw_dev->cfg_clk);
+	return 0;
+
+err_clk:
+	clk_disable_unprepare(dw_dev->clk);
+	return ret;
+}
+
+static int dw_phy_remove(struct platform_device *pdev)
+{
+	struct v4l2_subdev *sd = dev_get_drvdata(&pdev->dev);
+	struct dw_phy_dev *dw_dev = to_dw_dev(sd);
+
+	v4l2_async_unregister_subdev(sd);
+	clk_disable_unprepare(dw_dev->clk);
+	return 0;
+}
+
+static const struct of_device_id dw_hdmi_phy_e405_id[] = {
+	{ .compatible = "snps,dw-hdmi-phy-e405", .data = &dw_phy_e405_data, },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, dw_hdmi_phy_e405_id);
+
+static struct platform_driver dw_phy_e405_driver = {
+	.probe = dw_phy_probe,
+	.remove = dw_phy_remove,
+	.driver = {
+		.name = DW_PHY_E405_DRVNAME,
+		.of_match_table = dw_hdmi_phy_e405_id,
+	}
+};
+module_platform_driver(dw_phy_e405_driver);
diff --git a/drivers/media/platform/dwc/dw-hdmi-phy-e405.h b/drivers/media/platform/dwc/dw-hdmi-phy-e405.h
new file mode 100644
index 0000000..dcb71f0
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-hdmi-phy-e405.h
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// Copyright (c) 2017 Synopsys, Inc. and/or its affiliates.
+// Synopsys DesignWare HDMI PHY e405 driver
+
+#ifndef __DW_HDMI_PHY_E405_H__
+#define __DW_HDMI_PHY_E405_H__
+
+#define PHY_CMU_CONFIG				0x02
+#define PHY_SYSTEM_CONFIG			0x03
+#define PHY_MAINFSM_CTRL			0x05
+#define PHY_MAINFSM_OVR2			0x08
+#define PHY_MAINFSM_STATUS1			0x09
+#define PHY_OVL_PROT_CTRL			0x0D
+#define PHY_CDR_CTRL_CNT			0x0E
+#define PHY_CLK_MPLL_STATUS			0x2F
+#define PHY_CH0_EQ_CTRL1			0x32
+#define PHY_CH0_EQ_CTRL2			0x33
+#define PHY_CH0_EQ_STATUS			0x34
+#define PHY_CH0_EQ_CTRL3			0x3E
+#define PHY_CH0_EQ_CTRL4			0x3F
+#define PHY_CH0_EQ_STATUS2			0x40
+#define PHY_CH0_EQ_STATUS3			0x42
+#define PHY_CH0_EQ_CTRL6			0x43
+#define PHY_CH1_EQ_CTRL1			0x52
+#define PHY_CH1_EQ_CTRL2			0x53
+#define PHY_CH1_EQ_STATUS			0x54
+#define PHY_CH1_EQ_CTRL3			0x5E
+#define PHY_CH1_EQ_CTRL4			0x5F
+#define PHY_CH1_EQ_STATUS2			0x60
+#define PHY_CH1_EQ_STATUS3			0x62
+#define PHY_CH1_EQ_CTRL6			0x63
+#define PHY_CH2_EQ_CTRL1			0x72
+#define PHY_CH2_EQ_CTRL2			0x73
+#define PHY_CH2_EQ_STATUS			0x74
+#define PHY_CH2_EQ_CTRL3			0x7E
+#define PHY_CH2_EQ_CTRL4			0x7F
+#define PHY_CH2_EQ_STATUS2			0x80
+#define PHY_CH2_EQ_STATUS3			0x82
+#define PHY_CH2_EQ_CTRL6			0x83
+
+#endif /* __DW_HDMI_PHY_E405_H__ */
diff --git a/include/media/dwc/dw-hdmi-phy-pdata.h b/include/media/dwc/dw-hdmi-phy-pdata.h
new file mode 100644
index 0000000..04196ba
--- /dev/null
+++ b/include/media/dwc/dw-hdmi-phy-pdata.h
@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// Copyright (c) 2017 Synopsys, Inc. and/or its affiliates.
+// Synopsys DesignWare HDMI PHY platform data
+
+#ifndef __DW_HDMI_PHY_PDATA_H__
+#define __DW_HDMI_PHY_PDATA_H__
+
+#define DW_PHY_E405_DRVNAME	"dw-hdmi-phy-e405"
+
+#define DW_PHY_IOCTL_EQ_INIT		_IOW('R',1,int)
+#define DW_PHY_IOCTL_CONFIG		_IOW('R',2,int)
+
+/**
+ * struct dw_phy_eq_command - Command arguments for HDMI PHY equalizer
+ * 	algorithm.
+ *
+ * @nacq: Number of acquisitions to get.
+ *
+ * @force: Force equalizer algorithm even if the MPLL status didn't change
+ * from previous run.
+ *
+ * @result: Result from the equalizer algorithm. Shall be zero if equalizer
+ * ran with success or didn't run because the video mode does not need
+ * equalizer (for low clock values).
+ */
+struct dw_phy_eq_command {
+	u16 nacq;
+	bool force;
+	int result;
+};
+
+/**
+ * struct dw_phy_config_command - Command arguments for HDMI PHY configuration
+ * function.
+ *
+ * @color_depth: Color depth of the video mode being received.
+ *
+ * @hdmi2: Must be set to true if the video mode being received has a data
+ * rate above 3.4Gbps (generally HDMI 2.0 video modes, like 4k@60Hz).
+ *
+ * @scrambling: Must be set to true if scrambling is currently enabled.
+ * Scrambling is enabled by source when SCDC scrambling_en field is set to 1.
+ *
+ * @result: Result from the configuration function. Shall be zero if phy was
+ * configured with success.
+ */
+struct dw_phy_config_command {
+	unsigned char color_depth;
+	bool hdmi2;
+	bool scrambling;
+	int result;
+};
+
+/**
+ * struct dw_phy_funcs - Set of callbacks used to communicate between phy
+ * 	and hdmi controller. Controller must correctly fill these callbacks
+ * 	before probbing the phy driver.
+ *
+ * @write: write callback. Write value 'val' into address 'addr' of phy.
+ *
+ * @read: read callback. Read address 'addr' and return the value.
+ *
+ * @reset: reset callback. Activate phy reset. Active high.
+ *
+ * @pddq: pddq callback. Activate phy configuration mode. Active high.
+ *
+ * @svsmode: svsmode callback. Activate phy retention mode. Active low.
+ *
+ * @zcal_reset: zcal reset callback. Restart the impedance calibration
+ * procedure. Active high. This is only used in prototyping and not in real
+ * ASIC. Callback shall be empty (but non NULL) in ASIC cases.
+ *
+ * @zcal_done: zcal done callback. Return the current status of impedance
+ * calibration procedure. This is only used in prototyping and not in real
+ * ASIC. Shall return always true in ASIC cases.
+ *
+ * @tmds_valid: TMDS valid callback. Return the current status of TMDS signal
+ * that comes from phy and feeds controller. This is read from a controller
+ * register.
+ */
+struct dw_phy_funcs {
+	void (*write) (void *arg, u16 val, u16 addr);
+	u16 (*read) (void *arg, u16 addr);
+	void (*reset) (void *arg, int enable);
+	void (*pddq) (void *arg, int enable);
+	void (*svsmode) (void *arg, int enable);
+	void (*zcal_reset) (void *arg);
+	bool (*zcal_done) (void *arg);
+	bool (*tmds_valid) (void *arg);
+};
+
+/**
+ * struct dw_phy_pdata - Platform data definition for Synopsys HDMI PHY.
+ *
+ * @funcs: set of callbacks that must be correctly filled and supplied to phy.
+ * See @dw_phy_funcs.
+ *
+ * @funcs_arg: parameter that is supplied to callbacks along with the function
+ * parameters.
+ */
+struct dw_phy_pdata {
+	const struct dw_phy_funcs *funcs;
+	void *funcs_arg;
+};
+
+#endif /* __DW_HDMI_PHY_PDATA_H__ */
-- 
1.9.1

[PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Jose Abreu]

This is an initial submission for the Synopsys DesignWare HDMI RX
Controller Driver. This driver interacts with a phy driver so that
a communication between them is created and a video pipeline is
configured.

The controller + phy pipeline can then be integrated into a fully
featured system that can be able to receive video up to 4k@60Hz
with deep color 48bit RGB, depending on the platform. Although,
this initial version does not yet handle deep color modes.

This driver was implemented as a standard V4L2 subdevice and its
main features are:
	- Internal state machine that reconfigures phy until the
	video is not stable
	- JTAG communication with phy
	- Inter-module communication with phy driver
	- Debug write/read ioctls

Some notes:
	- RX sense controller (cable connection/disconnection) must
	be handled by the platform wrapper as this is not integrated
	into the controller RTL
	- The same goes for EDID ROM's
	- ZCAL calibration is needed only in FPGA platforms, in ASIC
	this is not needed
	- The state machine is not an ideal solution as it creates a
	kthread but it is needed because some sources might not be
	very stable at sending the video (i.e. we must react
	accordingly).

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Sylwester Nawrocki <snawrocki@kernel.org>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
---
Changes from v9:
	- Use SPDX License ID (Philippe)
	- Use LOW_DRIVE CEC error (Hans)
	- Fill bt->il_* fields (Hans)
	- Fix format->field to NONE (Hans)
	- Drop a left-over comment (Hans)
	- Use CEC_CAP_DEFAULTS (Hans)
Changes from v8:
	- Incorporate Sakari's work on ASYNC subdevs
Changes from v6:
	- edid-phandle now also looks for parent node (Sylwester)
	- Fix kbuild build warnings
Changes from v5:
	- Removed HDCP 1.4 support (Hans)
	- Removed some CEC debug messages (Hans)
	- Add s_dv_timings callback (Hans)
	- Add V4L2_CID_DV_RX_POWER_PRESENT ctrl (Hans)
Changes from v4:
	- Add flag V4L2_SUBDEV_FL_HAS_DEVNODE (Sylwester)
	- Remove some comments and change some messages to dev_dbg (Sylwester)
	- Use v4l2_async_subnotifier_register() (Sylwester)
Changes from v3:
	- Use v4l2 async API (Sylwester)
	- Do not block waiting for phy
	- Do not use busy waiting delays (Sylwester)
	- Simplify dw_hdmi_power_on (Sylwester)
	- Use clock API (Sylwester)
	- Use compatible string (Sylwester)
	- Minor fixes (Sylwester)
Changes from v2:
	- Address review comments from Hans regarding CEC
	- Use CEC notifier
	- Enable SCDC
Changes from v1:
	- Add support for CEC
	- Correct typo errors
	- Correctly detect interlaced video modes
	- Correct VIC parsing
Changes from RFC:
	- Add support for HDCP 1.4
	- Fixup HDMI_VIC not being parsed (Hans)
	- Send source change signal when powering off (Hans)
	- Add a "wait stable delay"
	- Detect interlaced video modes (Hans)
	- Restrain g/s_register from reading/writing to HDCP regs (Hans)
---
 drivers/media/platform/dwc/Kconfig      |   15 +
 drivers/media/platform/dwc/Makefile     |    1 +
 drivers/media/platform/dwc/dw-hdmi-rx.c | 1840 +++++++++++++++++++++++++++++++
 drivers/media/platform/dwc/dw-hdmi-rx.h |  419 +++++++
 include/media/dwc/dw-hdmi-rx-pdata.h    |   48 +
 5 files changed, 2323 insertions(+)
 create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.c
 create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.h
 create mode 100644 include/media/dwc/dw-hdmi-rx-pdata.h

diff --git a/drivers/media/platform/dwc/Kconfig b/drivers/media/platform/dwc/Kconfig
index 361d38d..3ddccde 100644
--- a/drivers/media/platform/dwc/Kconfig
+++ b/drivers/media/platform/dwc/Kconfig
@@ -6,3 +6,18 @@ config VIDEO_DWC_HDMI_PHY_E405
 
 	  To compile this driver as a module, choose M here. The module
 	  will be called dw-hdmi-phy-e405.
+
+config VIDEO_DWC_HDMI_RX
+	tristate "Synopsys Designware HDMI Receiver driver"
+	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+	help
+	  Support for Synopsys Designware HDMI RX controller.
+
+	  To compile this driver as a module, choose M here. The module
+	  will be called dw-hdmi-rx.
+
+config VIDEO_DWC_HDMI_RX_CEC
+	bool
+	depends on VIDEO_DWC_HDMI_RX
+	select CEC_CORE
+	select CEC_NOTIFIER
diff --git a/drivers/media/platform/dwc/Makefile b/drivers/media/platform/dwc/Makefile
index fc3b62c..cd04ca9 100644
--- a/drivers/media/platform/dwc/Makefile
+++ b/drivers/media/platform/dwc/Makefile
@@ -1 +1,2 @@
 obj-$(CONFIG_VIDEO_DWC_HDMI_PHY_E405) += dw-hdmi-phy-e405.o
+obj-$(CONFIG_VIDEO_DWC_HDMI_RX) += dw-hdmi-rx.o
diff --git a/drivers/media/platform/dwc/dw-hdmi-rx.c b/drivers/media/platform/dwc/dw-hdmi-rx.c
new file mode 100644
index 0000000..437351e
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-hdmi-rx.c
@@ -0,0 +1,1840 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// Copyright (c) 2017 Synopsys, Inc. and/or its affiliates.
+// Synopsys DesignWare HDMI Receiver controller driver
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/v4l2-dv-timings.h>
+#include <linux/workqueue.h>
+#include <media/cec.h>
+#include <media/cec-notifier.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dv-timings.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-subdev.h>
+#include <media/dwc/dw-hdmi-phy-pdata.h>
+#include <media/dwc/dw-hdmi-rx-pdata.h>
+#include "dw-hdmi-rx.h"
+
+#define HDMI_DEFAULT_TIMING		V4L2_DV_BT_CEA_640X480P59_94
+#define HDMI_CEC_MAX_LOG_ADDRS		CEC_MAX_LOG_ADDRS
+
+MODULE_AUTHOR("Jose Abreu <joabreu@synopsys.com>");
+MODULE_DESCRIPTION("DesignWare HDMI Receiver Driver");
+MODULE_LICENSE("Dual MIT/GPL");
+
+static const struct v4l2_dv_timings_cap dw_hdmi_timings_cap = {
+	.type = V4L2_DV_BT_656_1120,
+	.reserved = { 0 },
+	V4L2_INIT_BT_TIMINGS(
+			640, 4096,		/* min/max width */
+			480, 4455,		/* min/max height */
+			20000000, 600000000,	/* min/max pixelclock */
+			V4L2_DV_BT_STD_CEA861,	/* standards */
+			/* capabilities */
+			V4L2_DV_BT_CAP_PROGRESSIVE
+	)
+};
+
+static const struct v4l2_event dw_hdmi_event_fmt = {
+	.type = V4L2_EVENT_SOURCE_CHANGE,
+	.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
+};
+
+enum dw_hdmi_state {
+	HDMI_STATE_NO_INIT = 0,
+	HDMI_STATE_POWER_OFF,
+	HDMI_STATE_PHY_CONFIG,
+	HDMI_STATE_EQUALIZER,
+	HDMI_STATE_VIDEO_UNSTABLE,
+	HDMI_STATE_POWER_ON,
+};
+
+struct dw_hdmi_dev {
+	struct v4l2_async_notifier v4l2_notifier;
+	struct v4l2_async_subdev phy_async_sd;
+	struct dw_hdmi_rx_pdata *config;
+	struct workqueue_struct *wq;
+	struct work_struct work;
+	enum dw_hdmi_state state;
+	bool registered;
+	bool pending_config;
+	bool force_off;
+	spinlock_t lock;
+	void __iomem *regs;
+	struct device_node *of_node;
+	struct v4l2_subdev sd;
+	struct v4l2_dv_timings timings;
+	struct dw_phy_pdata phy_config;
+	struct platform_device *notifier_pdev;
+	struct v4l2_subdev *phy_sd;
+	bool phy_eq_force;
+	u8 phy_jtag_addr;
+	struct device *dev;
+	u32 mbus_code;
+	unsigned int selected_input;
+	unsigned int configured_input;
+	struct clk *clk;
+	u32 cfg_clk;
+	struct cec_adapter *cec_adap;
+	struct cec_notifier *cec_notifier;
+	struct v4l2_ctrl_handler hdl;
+	struct v4l2_ctrl *detect_tx_5v_ctrl;
+};
+
+static const char *get_state_name(enum dw_hdmi_state state)
+{
+	switch (state) {
+	case HDMI_STATE_NO_INIT:
+		return "NO_INIT";
+	case HDMI_STATE_POWER_OFF:
+		return "POWER_OFF";
+	case HDMI_STATE_PHY_CONFIG:
+		return "PHY_CONFIG";
+	case HDMI_STATE_EQUALIZER:
+		return "EQUALIZER";
+	case HDMI_STATE_VIDEO_UNSTABLE:
+		return "VIDEO_UNSTABLE";
+	case HDMI_STATE_POWER_ON:
+		return "POWER_ON";
+	default:
+		return "UNKNOWN";
+	}
+}
+
+static inline void dw_hdmi_set_state(struct dw_hdmi_dev *dw_dev,
+		enum dw_hdmi_state new_state)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dw_dev->lock, flags);
+	dev_dbg(dw_dev->dev, "old_state=%s, new_state=%s\n",
+			get_state_name(dw_dev->state),
+			get_state_name(new_state));
+	dw_dev->state = new_state;
+	spin_unlock_irqrestore(&dw_dev->lock, flags);
+}
+
+static inline struct dw_hdmi_dev *to_dw_dev(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct dw_hdmi_dev, sd);
+}
+
+static inline struct dw_hdmi_dev *notifier_to_dw_dev(
+		struct v4l2_async_notifier *notifier)
+{
+	return container_of(notifier, struct dw_hdmi_dev, v4l2_notifier);
+}
+
+static inline void hdmi_writel(struct dw_hdmi_dev *dw_dev, u32 val, int reg)
+{
+	writel(val, dw_dev->regs + reg);
+}
+
+static inline u32 hdmi_readl(struct dw_hdmi_dev *dw_dev, int reg)
+{
+	return readl(dw_dev->regs + reg);
+}
+
+static void hdmi_modl(struct dw_hdmi_dev *dw_dev, u32 data, u32 mask, int reg)
+{
+	u32 val = hdmi_readl(dw_dev, reg) & ~mask;
+
+	val |= data & mask;
+	hdmi_writel(dw_dev, val, reg);
+}
+
+static void hdmi_mask_writel(struct dw_hdmi_dev *dw_dev, u32 data, int reg,
+		u32 shift, u32 mask)
+{
+	hdmi_modl(dw_dev, data << shift, mask, reg);
+}
+
+static u32 hdmi_mask_readl(struct dw_hdmi_dev *dw_dev, int reg, u32 shift,
+		u32 mask)
+{
+	return (hdmi_readl(dw_dev, reg) & mask) >> shift;
+}
+
+static bool dw_hdmi_5v_status(struct dw_hdmi_dev *dw_dev, int input)
+{
+	void __iomem *arg = dw_dev->config->dw_5v_arg;
+
+	if (dw_dev->config->dw_5v_status)
+		return dw_dev->config->dw_5v_status(arg, input);
+	return false;
+}
+
+static void dw_hdmi_5v_clear(struct dw_hdmi_dev *dw_dev)
+{
+	void __iomem *arg = dw_dev->config->dw_5v_arg;
+
+	if (dw_dev->config->dw_5v_clear)
+		dw_dev->config->dw_5v_clear(arg);
+}
+
+static inline bool is_off(struct dw_hdmi_dev *dw_dev)
+{
+	return dw_dev->state <= HDMI_STATE_POWER_OFF;
+}
+
+static bool has_signal(struct dw_hdmi_dev *dw_dev, unsigned int input)
+{
+	return dw_hdmi_5v_status(dw_dev, input);
+}
+
+#define HDMI_JTAG_TAP_ADDR_CMD		0
+#define HDMI_JTAG_TAP_WRITE_CMD		1
+#define HDMI_JTAG_TAP_READ_CMD		3
+
+static void hdmi_phy_jtag_send_pulse(struct dw_hdmi_dev *dw_dev, u8 tms, u8 tdi)
+{
+	u8 val;
+
+	val = tms ? HDMI_PHY_JTAG_TAP_IN_TMS : 0;
+	val |= tdi ? HDMI_PHY_JTAG_TAP_IN_TDI : 0;
+
+	hdmi_writel(dw_dev, 0, HDMI_PHY_JTAG_TAP_TCLK);
+	hdmi_writel(dw_dev, val, HDMI_PHY_JTAG_TAP_IN);
+	hdmi_writel(dw_dev, 1, HDMI_PHY_JTAG_TAP_TCLK);
+}
+
+static void hdmi_phy_jtag_shift_dr(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_phy_jtag_send_pulse(dw_dev, 1, 0);
+	hdmi_phy_jtag_send_pulse(dw_dev, 0, 0);
+	hdmi_phy_jtag_send_pulse(dw_dev, 0, 0);
+}
+
+static void hdmi_phy_jtag_shift_ir(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_phy_jtag_send_pulse(dw_dev, 1, 0);
+	hdmi_phy_jtag_send_pulse(dw_dev, 1, 0);
+	hdmi_phy_jtag_send_pulse(dw_dev, 0, 0);
+	hdmi_phy_jtag_send_pulse(dw_dev, 0, 0);
+}
+
+static u16 hdmi_phy_jtag_send(struct dw_hdmi_dev *dw_dev, u8 cmd, u16 val)
+{
+	u32 in = (cmd << 16) | val;
+	u16 out = 0;
+	int i;
+
+	for (i = 0; i < 16; i++) {
+		hdmi_phy_jtag_send_pulse(dw_dev, 0, in & 0x1);
+		out |= (hdmi_readl(dw_dev, HDMI_PHY_JTAG_TAP_OUT) & 0x1) << i;
+		in >>= 1;
+	}
+
+	hdmi_phy_jtag_send_pulse(dw_dev, 0, in & 0x1);
+	in >>= 1;
+	hdmi_phy_jtag_send_pulse(dw_dev, 1, in & 0x1);
+
+	out |= (hdmi_readl(dw_dev, HDMI_PHY_JTAG_TAP_OUT) & 0x1) << ++i;
+	return out;
+}
+
+static void hdmi_phy_jtag_idle(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_phy_jtag_send_pulse(dw_dev, 1, 0);
+	hdmi_phy_jtag_send_pulse(dw_dev, 0, 0);
+}
+
+static void hdmi_phy_jtag_init(struct dw_hdmi_dev *dw_dev, u8 addr)
+{
+	int i;
+
+	hdmi_writel(dw_dev, addr, HDMI_PHY_JTAG_ADDR);
+	/* reset */
+	hdmi_writel(dw_dev, 0x10, HDMI_PHY_JTAG_TAP_IN);
+	hdmi_writel(dw_dev, 0x0, HDMI_PHY_JTAG_CONF);
+	hdmi_writel(dw_dev, 0x1, HDMI_PHY_JTAG_CONF);
+	hdmi_phy_jtag_send_pulse(dw_dev, 0, 0);
+	/* soft reset */
+	for (i = 0; i < 5; i++)
+		hdmi_phy_jtag_send_pulse(dw_dev, 1, 0);
+	hdmi_phy_jtag_send_pulse(dw_dev, 0, 0);
+	/* set slave address */
+	hdmi_phy_jtag_shift_ir(dw_dev);
+	for (i = 0; i < 7; i++) {
+		hdmi_phy_jtag_send_pulse(dw_dev, 0, addr & 0x1);
+		addr >>= 1;
+	}
+	hdmi_phy_jtag_send_pulse(dw_dev, 1, addr & 0x1);
+	hdmi_phy_jtag_idle(dw_dev);
+}
+
+static void hdmi_phy_jtag_write(struct dw_hdmi_dev *dw_dev, u16 val, u16 addr)
+{
+	hdmi_phy_jtag_shift_dr(dw_dev);
+	hdmi_phy_jtag_send(dw_dev, HDMI_JTAG_TAP_ADDR_CMD, addr << 8);
+	hdmi_phy_jtag_idle(dw_dev);
+	hdmi_phy_jtag_shift_dr(dw_dev);
+	hdmi_phy_jtag_send(dw_dev, HDMI_JTAG_TAP_WRITE_CMD, val);
+	hdmi_phy_jtag_idle(dw_dev);
+}
+
+static u16 hdmi_phy_jtag_read(struct dw_hdmi_dev *dw_dev, u16 addr)
+{
+	u16 val;
+
+	hdmi_phy_jtag_shift_dr(dw_dev);
+	hdmi_phy_jtag_send(dw_dev, HDMI_JTAG_TAP_ADDR_CMD, addr << 8);
+	hdmi_phy_jtag_idle(dw_dev);
+	hdmi_phy_jtag_shift_dr(dw_dev);
+	val = hdmi_phy_jtag_send(dw_dev, HDMI_JTAG_TAP_READ_CMD, 0xFFFF);
+	hdmi_phy_jtag_idle(dw_dev);
+	
+	return val;
+}
+
+static void dw_hdmi_phy_write(void *arg, u16 val, u16 addr)
+{
+	struct dw_hdmi_dev *dw_dev = arg;
+	u16 rval;
+
+	hdmi_phy_jtag_init(dw_dev, dw_dev->phy_jtag_addr);
+	hdmi_phy_jtag_write(dw_dev, val, addr);
+	rval = hdmi_phy_jtag_read(dw_dev, addr);
+
+	if (rval != val) {
+		dev_err(dw_dev->dev,
+			"JTAG read-back failed: expected=0x%x, got=0x%x\n",
+			val, rval);
+	}
+}
+
+static u16 dw_hdmi_phy_read(void *arg, u16 addr)
+{
+	struct dw_hdmi_dev *dw_dev = arg;
+
+	hdmi_phy_jtag_init(dw_dev, dw_dev->phy_jtag_addr);
+	return hdmi_phy_jtag_read(dw_dev, addr);
+}
+
+static void dw_hdmi_phy_reset(void *arg, int enable)
+{
+	struct dw_hdmi_dev *dw_dev = arg;
+
+	hdmi_mask_writel(dw_dev, enable, HDMI_PHY_CTRL,
+			HDMI_PHY_CTRL_RESET_OFFSET,
+			HDMI_PHY_CTRL_RESET_MASK);
+}
+
+static void dw_hdmi_phy_pddq(void *arg, int enable)
+{
+	struct dw_hdmi_dev *dw_dev = arg;
+
+	hdmi_mask_writel(dw_dev, enable, HDMI_PHY_CTRL,
+			HDMI_PHY_CTRL_PDDQ_OFFSET,
+			HDMI_PHY_CTRL_PDDQ_MASK);
+}
+
+static void dw_hdmi_phy_svsmode(void *arg, int enable)
+{
+	struct dw_hdmi_dev *dw_dev = arg;
+
+	hdmi_mask_writel(dw_dev, enable, HDMI_PHY_CTRL,
+			HDMI_PHY_CTRL_SVSRETMODEZ_OFFSET,
+			HDMI_PHY_CTRL_SVSRETMODEZ_MASK);
+}
+
+static void dw_hdmi_zcal_reset(void *arg)
+{
+	struct dw_hdmi_dev *dw_dev = arg;
+
+	if (dw_dev->config->dw_zcal_reset)
+		dw_dev->config->dw_zcal_reset(dw_dev->config->dw_zcal_arg);
+}
+
+static bool dw_hdmi_zcal_done(void *arg)
+{
+	struct dw_hdmi_dev *dw_dev = arg;
+
+	if (dw_dev->config->dw_zcal_done)
+		return dw_dev->config->dw_zcal_done(dw_dev->config->dw_zcal_arg);
+	return true;
+}
+
+static bool dw_hdmi_tmds_valid(void *arg)
+{
+	struct dw_hdmi_dev *dw_dev = arg;
+
+	return hdmi_readl(dw_dev, HDMI_PLL_LCK_STS) & HDMI_PLL_LCK_STS_PLL_LOCKED;
+}
+
+static const struct dw_phy_funcs dw_hdmi_phy_funcs = {
+	.write = dw_hdmi_phy_write,
+	.read = dw_hdmi_phy_read,
+	.reset = dw_hdmi_phy_reset,
+	.pddq = dw_hdmi_phy_pddq,
+	.svsmode = dw_hdmi_phy_svsmode,
+	.zcal_reset = dw_hdmi_zcal_reset,
+	.zcal_done = dw_hdmi_zcal_done,
+	.tmds_valid = dw_hdmi_tmds_valid,
+};
+
+static const struct of_device_id dw_hdmi_supported_phys[] = {
+	{ .compatible = "snps,dw-hdmi-phy-e405", .data = DW_PHY_E405_DRVNAME, },
+	{ },
+};
+
+static struct device_node *dw_hdmi_get_phy_of_node(struct dw_hdmi_dev *dw_dev,
+		const struct of_device_id **found_id)
+{
+	struct device_node *child = NULL;
+	const struct of_device_id *id;
+
+	for_each_child_of_node(dw_dev->of_node, child) {
+		id = of_match_node(dw_hdmi_supported_phys, child);
+		if (id)
+			break;
+	}
+
+	if (!id)
+		return NULL;
+	if (found_id)
+		*found_id = id;
+
+	return child;
+}
+
+static int dw_hdmi_phy_init(struct dw_hdmi_dev *dw_dev)
+{
+	struct dw_phy_pdata *phy = &dw_dev->phy_config;
+	struct of_dev_auxdata lookup = { };
+	const struct of_device_id *of_id;
+	struct device_node *child;
+	const char *drvname;
+	int ret;
+
+	child = dw_hdmi_get_phy_of_node(dw_dev, &of_id);
+	if (!child || !of_id || !of_id->data) {
+		dev_err(dw_dev->dev, "no supported phy found in DT\n");
+		return -EINVAL;
+	}
+
+	drvname = of_id->data;
+	phy->funcs = &dw_hdmi_phy_funcs;
+	phy->funcs_arg = dw_dev;
+
+	lookup.compatible = (char *)of_id->compatible;
+	lookup.platform_data = phy;
+
+	request_module(drvname);
+
+	ret = of_platform_populate(dw_dev->of_node, NULL, &lookup, dw_dev->dev);
+	if (ret) {
+		dev_err(dw_dev->dev, "failed to populate phy driver\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static void dw_hdmi_phy_exit(struct dw_hdmi_dev *dw_dev)
+{
+	of_platform_depopulate(dw_dev->dev);
+}
+
+static int dw_hdmi_phy_eq_init(struct dw_hdmi_dev *dw_dev, u16 acq, bool force)
+{
+	struct dw_phy_eq_command cmd = {
+		.result = 0,
+		.nacq = acq,
+		.force = force,
+	};
+	int ret;
+
+	ret = v4l2_subdev_call(dw_dev->phy_sd, core, ioctl,
+			DW_PHY_IOCTL_EQ_INIT, &cmd);
+	if (ret)
+		return ret;
+	return cmd.result;
+}
+
+static int dw_hdmi_phy_config(struct dw_hdmi_dev *dw_dev,
+		unsigned char color_depth, bool hdmi2, bool scrambling)
+{
+	struct dw_phy_config_command cmd = {
+		.result = 0,
+		.color_depth = color_depth,
+		.hdmi2 = hdmi2,
+		.scrambling = scrambling,
+	};
+	int ret;
+
+	hdmi_mask_writel(dw_dev, 0x1, HDMI_CBUSIOCTRL,
+			HDMI_CBUSIOCTRL_DATAPATH_CBUSZ_OFFSET,
+			HDMI_CBUSIOCTRL_DATAPATH_CBUSZ_MASK);
+	hdmi_mask_writel(dw_dev, 0x1, HDMI_CBUSIOCTRL,
+			HDMI_CBUSIOCTRL_SVSRETMODEZ_OFFSET,
+			HDMI_CBUSIOCTRL_SVSRETMODEZ_MASK);
+	hdmi_mask_writel(dw_dev, 0x1, HDMI_CBUSIOCTRL,
+			HDMI_CBUSIOCTRL_PDDQ_OFFSET,
+			HDMI_CBUSIOCTRL_PDDQ_MASK);
+	hdmi_mask_writel(dw_dev, 0x1, HDMI_CBUSIOCTRL,
+			HDMI_CBUSIOCTRL_RESET_OFFSET,
+			HDMI_CBUSIOCTRL_RESET_MASK);
+
+	ret = v4l2_subdev_call(dw_dev->phy_sd, core, ioctl,
+			DW_PHY_IOCTL_CONFIG, &cmd);
+	if (ret)
+		return ret;
+	return cmd.result;
+}
+
+static void dw_hdmi_phy_s_power(struct dw_hdmi_dev *dw_dev, bool on)
+{
+	v4l2_subdev_call(dw_dev->phy_sd, core, s_power, on);
+}
+
+static void dw_hdmi_event_source_change(struct dw_hdmi_dev *dw_dev)
+{
+	if (dw_dev->registered)
+		v4l2_subdev_notify_event(&dw_dev->sd, &dw_hdmi_event_fmt);
+}
+
+static int dw_hdmi_wait_phy_lock_poll(struct dw_hdmi_dev *dw_dev)
+{
+	int timeout = 10;
+
+	while (!dw_hdmi_tmds_valid(dw_dev) && timeout-- && !dw_dev->force_off)
+		usleep_range(5000, 10000);
+
+	if (!dw_hdmi_tmds_valid(dw_dev))
+		return -ETIMEDOUT;
+	return 0;
+}
+
+static void dw_hdmi_reset_datapath(struct dw_hdmi_dev *dw_dev)
+{
+	u32 val = HDMI_DMI_SW_RST_TMDS |
+		HDMI_DMI_SW_RST_HDCP |
+		HDMI_DMI_SW_RST_VID |
+		HDMI_DMI_SW_RST_PIXEL |
+		HDMI_DMI_SW_RST_CEC |
+		HDMI_DMI_SW_RST_AUD |
+		HDMI_DMI_SW_RST_BUS |
+		HDMI_DMI_SW_RST_HDMI |
+		HDMI_DMI_SW_RST_MODET;
+
+	hdmi_writel(dw_dev, val, HDMI_DMI_SW_RST);
+}
+
+static void dw_hdmi_wait_video_stable(struct dw_hdmi_dev *dw_dev)
+{
+	/*
+	 * Empiric value. Video should be stable way longer before the
+	 * end of this sleep time. Though, we can have some video change
+	 * interrupts before the video is stable so filter them by sleeping.
+	 */
+	msleep(200);
+}
+
+static void dw_hdmi_enable_ints(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_writel(dw_dev, HDMI_ISTS_CLK_CHANGE | HDMI_ISTS_PLL_LCK_CHG,
+			HDMI_IEN_SET);
+	hdmi_writel(dw_dev, (~0x0) & (~(HDMI_MD_ISTS_VOFS_LIN |
+					HDMI_MD_ISTS_VTOT_LIN |
+					HDMI_MD_ISTS_VACT_LIN |
+					HDMI_MD_ISTS_VS_CLK |
+					HDMI_MD_ISTS_VTOT_CLK |
+					HDMI_MD_ISTS_VS_ACT |
+					HDMI_MD_ISTS_ILACE)), HDMI_MD_IEN_SET);
+}
+
+static void dw_hdmi_disable_ints(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_writel(dw_dev, ~0x0, HDMI_IEN_CLR);
+	hdmi_writel(dw_dev, ~0x0, HDMI_MD_IEN_CLR);
+}
+
+static void dw_hdmi_clear_ints(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_writel(dw_dev, ~0x0, HDMI_ICLR);
+	hdmi_writel(dw_dev, ~0x0, HDMI_MD_ICLR);
+}
+
+static u32 dw_hdmi_get_int_val(struct dw_hdmi_dev *dw_dev, u32 ists, u32 ien)
+{
+	return hdmi_readl(dw_dev, ists) & hdmi_readl(dw_dev, ien);
+}
+
+#if IS_ENABLED(CONFIG_VIDEO_DWC_HDMI_RX_CEC)
+static void dw_hdmi_cec_enable_ints(struct dw_hdmi_dev *dw_dev)
+{
+	u32 mask = HDMI_AUD_CEC_ISTS_DONE | HDMI_AUD_CEC_ISTS_EOM |
+		HDMI_AUD_CEC_ISTS_NACK | HDMI_AUD_CEC_ISTS_ARBLST |
+		HDMI_AUD_CEC_ISTS_ERROR_INIT | HDMI_AUD_CEC_ISTS_ERROR_FOLL;
+
+	hdmi_writel(dw_dev, mask, HDMI_AUD_CEC_IEN_SET);
+	hdmi_writel(dw_dev, 0x0, HDMI_CEC_MASK);
+}
+
+static void dw_hdmi_cec_disable_ints(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_writel(dw_dev, ~0x0, HDMI_AUD_CEC_IEN_CLR);
+	hdmi_writel(dw_dev, ~0x0, HDMI_CEC_MASK);
+}
+
+static void dw_hdmi_cec_clear_ints(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_writel(dw_dev, ~0x0, HDMI_AUD_CEC_ICLR);
+}
+
+static void dw_hdmi_cec_tx_raw_status(struct dw_hdmi_dev *dw_dev, u32 stat)
+{
+	if (hdmi_readl(dw_dev, HDMI_CEC_CTRL) & HDMI_CEC_CTRL_SEND_MASK) {
+		dev_dbg(dw_dev->dev, "%s: tx is busy\n", __func__);
+		return;
+	}
+
+	if (stat & HDMI_AUD_CEC_ISTS_ARBLST) {
+		cec_transmit_attempt_done(dw_dev->cec_adap,
+				CEC_TX_STATUS_ARB_LOST);
+		return;
+	}
+
+	if (stat & HDMI_AUD_CEC_ISTS_NACK) {
+		cec_transmit_attempt_done(dw_dev->cec_adap, CEC_TX_STATUS_NACK);
+		return;
+	}
+
+	if (stat & HDMI_AUD_CEC_ISTS_ERROR_INIT) {
+		dev_dbg(dw_dev->dev, "%s: got low drive error\n", __func__);
+		cec_transmit_attempt_done(dw_dev->cec_adap,
+				CEC_TX_STATUS_LOW_DRIVE);
+		return;
+	}
+
+	if (stat & HDMI_AUD_CEC_ISTS_DONE) {
+		cec_transmit_attempt_done(dw_dev->cec_adap, CEC_TX_STATUS_OK);
+		return;
+	}
+}
+
+static void dw_hdmi_cec_received_msg(struct dw_hdmi_dev *dw_dev)
+{
+	struct cec_msg msg;
+	u8 i;
+
+	msg.len = hdmi_readl(dw_dev, HDMI_CEC_RX_CNT);
+	if (!msg.len || msg.len > HDMI_CEC_RX_DATA_MAX)
+		return; /* it's an invalid/non-existent message */
+
+	for (i = 0; i < msg.len; i++)
+		msg.msg[i] = hdmi_readl(dw_dev, HDMI_CEC_RX_DATA(i));
+
+	hdmi_writel(dw_dev, 0x0, HDMI_CEC_LOCK);
+	cec_received_msg(dw_dev->cec_adap, &msg);
+}
+
+static int dw_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
+{
+	struct dw_hdmi_dev *dw_dev = cec_get_drvdata(adap);
+
+	if (enable) {
+		hdmi_writel(dw_dev, 0x0, HDMI_CEC_ADDR_L);
+		hdmi_writel(dw_dev, 0x0, HDMI_CEC_ADDR_H);
+		hdmi_writel(dw_dev, 0x0, HDMI_CEC_LOCK);
+		dw_hdmi_cec_clear_ints(dw_dev);
+		dw_hdmi_cec_enable_ints(dw_dev);
+	} else {
+		hdmi_writel(dw_dev, 0x0, HDMI_CEC_ADDR_L);
+		hdmi_writel(dw_dev, 0x0, HDMI_CEC_ADDR_H);
+		dw_hdmi_cec_disable_ints(dw_dev);
+		dw_hdmi_cec_clear_ints(dw_dev);
+	}
+
+	return 0;
+}
+
+static int dw_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
+{
+	struct dw_hdmi_dev *dw_dev = cec_get_drvdata(adap);
+	u32 tmp;
+
+	if (addr == CEC_LOG_ADDR_INVALID) {
+		hdmi_writel(dw_dev, 0x0, HDMI_CEC_ADDR_L);
+		hdmi_writel(dw_dev, 0x0, HDMI_CEC_ADDR_H);
+		return 0;
+	}
+
+	if (addr >= 8) {
+		tmp = hdmi_readl(dw_dev, HDMI_CEC_ADDR_H);
+		tmp |= BIT(addr - 8);
+		hdmi_writel(dw_dev, tmp, HDMI_CEC_ADDR_H);
+	} else {
+		tmp = hdmi_readl(dw_dev, HDMI_CEC_ADDR_L);
+		tmp |= BIT(addr);
+		hdmi_writel(dw_dev, tmp, HDMI_CEC_ADDR_L);
+	}
+
+	return 0;
+}
+
+static int dw_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
+		u32 signal_free_time, struct cec_msg *msg)
+{
+	struct dw_hdmi_dev *dw_dev = cec_get_drvdata(adap);
+	u8 len = msg->len;
+	u32 reg;
+	int i;
+
+	if (hdmi_readl(dw_dev, HDMI_CEC_CTRL) & HDMI_CEC_CTRL_SEND_MASK) {
+		dev_err(dw_dev->dev, "%s: tx is busy\n", __func__);
+		return -EBUSY;
+	}
+
+	for (i = 0; i < len; i++)
+		hdmi_writel(dw_dev, msg->msg[i], HDMI_CEC_TX_DATA(i));
+
+	switch (signal_free_time) {
+	case CEC_SIGNAL_FREE_TIME_RETRY:
+		reg = 0x0;
+		break;
+	case CEC_SIGNAL_FREE_TIME_NEXT_XFER:
+		reg = 0x2;
+		break;
+	case CEC_SIGNAL_FREE_TIME_NEW_INITIATOR:
+	default:
+		reg = 0x1;
+		break;
+	}
+
+	hdmi_writel(dw_dev, len, HDMI_CEC_TX_CNT);
+	hdmi_mask_writel(dw_dev, reg, HDMI_CEC_CTRL,
+			HDMI_CEC_CTRL_FRAME_TYP_OFFSET,
+			HDMI_CEC_CTRL_FRAME_TYP_MASK);
+	hdmi_mask_writel(dw_dev, 0x1, HDMI_CEC_CTRL,
+			HDMI_CEC_CTRL_SEND_OFFSET,
+			HDMI_CEC_CTRL_SEND_MASK);
+	return 0;
+}
+
+static const struct cec_adap_ops dw_hdmi_cec_adap_ops = {
+	.adap_enable = dw_hdmi_cec_adap_enable,
+	.adap_log_addr = dw_hdmi_cec_adap_log_addr,
+	.adap_transmit = dw_hdmi_cec_adap_transmit,
+};
+
+static void dw_hdmi_cec_irq_handler(struct dw_hdmi_dev *dw_dev)
+{
+	u32 cec_ists = dw_hdmi_get_int_val(dw_dev, HDMI_AUD_CEC_ISTS,
+			HDMI_AUD_CEC_IEN);
+
+	dw_hdmi_cec_clear_ints(dw_dev);
+
+	if (cec_ists) {
+		dw_hdmi_cec_tx_raw_status(dw_dev, cec_ists);
+		if (cec_ists & HDMI_AUD_CEC_ISTS_EOM)
+			dw_hdmi_cec_received_msg(dw_dev);
+	}
+}
+#endif
+
+static u8 dw_hdmi_get_curr_vic(struct dw_hdmi_dev *dw_dev, bool *is_hdmi_vic)
+{
+	u8 vic = hdmi_mask_readl(dw_dev, HDMI_PDEC_AVI_PB,
+			HDMI_PDEC_AVI_PB_VID_IDENT_CODE_OFFSET,
+			HDMI_PDEC_AVI_PB_VID_IDENT_CODE_MASK) & 0xff;
+
+	if (!vic) {
+		vic = hdmi_mask_readl(dw_dev, HDMI_PDEC_VSI_PAYLOAD0,
+				HDMI_PDEC_VSI_PAYLOAD0_HDMI_VIC_OFFSET,
+				HDMI_PDEC_VSI_PAYLOAD0_HDMI_VIC_MASK) & 0xff;
+		if (is_hdmi_vic)
+			*is_hdmi_vic = true;
+	} else {
+		if (is_hdmi_vic)
+			*is_hdmi_vic = false;
+	}
+
+	return vic;
+}
+
+static u64 dw_hdmi_get_pixelclk(struct dw_hdmi_dev *dw_dev)
+{
+	u32 rate = hdmi_mask_readl(dw_dev, HDMI_CKM_RESULT,
+			HDMI_CKM_RESULT_CLKRATE_OFFSET,
+			HDMI_CKM_RESULT_CLKRATE_MASK);
+	u32 evaltime = hdmi_mask_readl(dw_dev, HDMI_CKM_EVLTM,
+			HDMI_CKM_EVLTM_EVAL_TIME_OFFSET,
+			HDMI_CKM_EVLTM_EVAL_TIME_MASK);
+	u64 tmp = (u64)rate * (u64)dw_dev->cfg_clk * 1000000;
+
+	do_div(tmp, evaltime);
+	return tmp;
+}
+
+static u32 dw_hdmi_get_colordepth(struct dw_hdmi_dev *dw_dev)
+{
+	u32 dcm = hdmi_mask_readl(dw_dev, HDMI_STS,
+			HDMI_STS_DCM_CURRENT_MODE_OFFSET,
+			HDMI_STS_DCM_CURRENT_MODE_MASK);
+
+	switch (dcm) {
+	case 0x4:
+		return 24;
+	case 0x5:
+		return 30;
+	case 0x6:
+		return 36;
+	case 0x7:
+		return 48;
+	default:
+		return 24;
+	}
+}
+
+static void dw_hdmi_set_input(struct dw_hdmi_dev *dw_dev, u32 input)
+{
+	hdmi_mask_writel(dw_dev, input, HDMI_PHY_CTRL,
+			HDMI_PHY_CTRL_PORTSELECT_OFFSET,
+			HDMI_PHY_CTRL_PORTSELECT_MASK);
+}
+
+static void dw_hdmi_enable_hpd(struct dw_hdmi_dev *dw_dev, u32 input_mask)
+{
+	hdmi_mask_writel(dw_dev, input_mask, HDMI_SETUP_CTRL,
+			HDMI_SETUP_CTRL_HOT_PLUG_DETECT_INPUT_X_OFFSET,
+			HDMI_SETUP_CTRL_HOT_PLUG_DETECT_INPUT_X_MASK);
+	hdmi_mask_writel(dw_dev, 0x1, HDMI_SETUP_CTRL,
+			HDMI_SETUP_CTRL_HOT_PLUG_DETECT_OFFSET,
+			HDMI_SETUP_CTRL_HOT_PLUG_DETECT_MASK);
+}
+
+static void dw_hdmi_disable_hpd(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_mask_writel(dw_dev, 0x0, HDMI_SETUP_CTRL,
+			HDMI_SETUP_CTRL_HOT_PLUG_DETECT_INPUT_X_OFFSET,
+			HDMI_SETUP_CTRL_HOT_PLUG_DETECT_INPUT_X_MASK);
+	hdmi_mask_writel(dw_dev, 0x0, HDMI_SETUP_CTRL,
+			HDMI_SETUP_CTRL_HOT_PLUG_DETECT_OFFSET,
+			HDMI_SETUP_CTRL_HOT_PLUG_DETECT_MASK);
+}
+
+static void dw_hdmi_enable_scdc(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_mask_writel(dw_dev, 0x1, HDMI_SCDC_CONFIG,
+			HDMI_SCDC_CONFIG_POWERPROVIDED_OFFSET,
+			HDMI_SCDC_CONFIG_POWERPROVIDED_MASK);
+}
+
+static void dw_hdmi_disable_scdc(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_mask_writel(dw_dev, 0x0, HDMI_SCDC_CONFIG,
+			HDMI_SCDC_CONFIG_POWERPROVIDED_OFFSET,
+			HDMI_SCDC_CONFIG_POWERPROVIDED_MASK);
+}
+
+static int dw_hdmi_config(struct dw_hdmi_dev *dw_dev, u32 input)
+{
+	int eqret, ret = 0;
+
+	while (1) {
+		/* Give up silently if we are forcing off */
+		if (dw_dev->force_off) {
+			ret = 0;
+			goto out;
+		}
+		/* Give up silently if input has disconnected */
+		if (!has_signal(dw_dev, input)) {
+			ret = 0;
+			goto out;
+		}
+
+		switch (dw_dev->state) {
+		case HDMI_STATE_POWER_OFF:
+			dw_hdmi_disable_ints(dw_dev);
+			dw_hdmi_set_state(dw_dev, HDMI_STATE_PHY_CONFIG);
+			break;
+		case HDMI_STATE_PHY_CONFIG:
+			dw_hdmi_phy_s_power(dw_dev, true);
+			dw_hdmi_phy_config(dw_dev, 8, false, false);
+			dw_hdmi_set_state(dw_dev, HDMI_STATE_EQUALIZER);
+			break;
+		case HDMI_STATE_EQUALIZER:
+			eqret = dw_hdmi_phy_eq_init(dw_dev, 5,
+					dw_dev->phy_eq_force);
+			ret = dw_hdmi_wait_phy_lock_poll(dw_dev);
+
+			/* Do not force equalizer */
+			dw_dev->phy_eq_force = false;
+
+			if (ret || eqret) {
+				if (ret || eqret == -ETIMEDOUT) {
+					/* No TMDSVALID signal:
+					 * 	- force equalizer */
+					dw_dev->phy_eq_force = true;
+				}
+				break;
+			}
+
+			dw_hdmi_set_state(dw_dev, HDMI_STATE_VIDEO_UNSTABLE);
+			break;
+		case HDMI_STATE_VIDEO_UNSTABLE:
+			dw_hdmi_reset_datapath(dw_dev);
+			dw_hdmi_wait_video_stable(dw_dev);
+			dw_hdmi_clear_ints(dw_dev);
+			dw_hdmi_enable_ints(dw_dev);
+			dw_hdmi_set_state(dw_dev, HDMI_STATE_POWER_ON);
+			break;
+		case HDMI_STATE_POWER_ON:
+			break;
+		default:
+			dev_err(dw_dev->dev, "%s called with state (%d)\n",
+					__func__, dw_dev->state);
+			ret = -EINVAL;
+			goto out;
+		}
+
+		if (dw_dev->state == HDMI_STATE_POWER_ON) {
+			dev_info(dw_dev->dev, "HDMI-RX configured\n");
+			dw_hdmi_event_source_change(dw_dev);
+			return 0;
+		}
+	}
+
+out:
+	dw_hdmi_set_state(dw_dev, HDMI_STATE_POWER_OFF);
+	return ret;
+}
+
+static void dw_hdmi_config_hdcp(struct dw_hdmi_dev *dw_dev)
+{
+	hdmi_mask_writel(dw_dev, 0x0, HDMI_HDCP22_CONTROL,
+			HDMI_HDCP22_CONTROL_OVR_VAL_OFFSET,
+			HDMI_HDCP22_CONTROL_OVR_VAL_MASK);
+	hdmi_mask_writel(dw_dev, 0x1, HDMI_HDCP22_CONTROL,
+			HDMI_HDCP22_CONTROL_OVR_EN_OFFSET,
+			HDMI_HDCP22_CONTROL_OVR_EN_MASK);
+}
+
+static int __dw_hdmi_power_on(struct dw_hdmi_dev *dw_dev, u32 input)
+{
+	unsigned long flags;
+	int ret;
+
+	ret = dw_hdmi_config(dw_dev, input);
+
+	spin_lock_irqsave(&dw_dev->lock, flags);
+	dw_dev->pending_config = false;
+	spin_unlock_irqrestore(&dw_dev->lock, flags);
+
+	return ret;
+}
+
+static void dw_hdmi_work_handler(struct work_struct *work)
+{
+	struct dw_hdmi_dev *dw_dev = container_of(work, struct dw_hdmi_dev, work);
+
+	__dw_hdmi_power_on(dw_dev, dw_dev->configured_input);
+}
+
+static int dw_hdmi_power_on(struct dw_hdmi_dev *dw_dev, u32 input)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dw_dev->lock, flags);
+	if (dw_dev->pending_config) {
+		spin_unlock_irqrestore(&dw_dev->lock, flags);
+		return 0;
+	}
+
+	INIT_WORK(&dw_dev->work, dw_hdmi_work_handler);
+	dw_dev->configured_input = input;
+	dw_dev->pending_config = true;
+	queue_work(dw_dev->wq, &dw_dev->work);
+	spin_unlock_irqrestore(&dw_dev->lock, flags);
+	return 0;
+}
+
+static void dw_hdmi_power_off(struct dw_hdmi_dev *dw_dev)
+{
+	unsigned long flags;
+
+	dw_dev->force_off = true;
+	flush_workqueue(dw_dev->wq);
+	dw_dev->force_off = false;
+
+	spin_lock_irqsave(&dw_dev->lock, flags);
+	dw_dev->pending_config = false;
+	dw_dev->state = HDMI_STATE_POWER_OFF;
+	spin_unlock_irqrestore(&dw_dev->lock, flags);
+
+	/* Reset variables */
+	dw_dev->phy_eq_force = true;
+
+	/* Send source change event to userspace */
+	dw_hdmi_event_source_change(dw_dev);
+}
+
+static irqreturn_t dw_hdmi_irq_handler(int irq, void *dev_data)
+{
+	struct dw_hdmi_dev *dw_dev = dev_data;
+	u32 hdmi_ists = dw_hdmi_get_int_val(dw_dev, HDMI_ISTS, HDMI_IEN);
+	u32 md_ists = dw_hdmi_get_int_val(dw_dev, HDMI_MD_ISTS, HDMI_MD_IEN);
+
+	dw_hdmi_clear_ints(dw_dev);
+
+	if ((hdmi_ists & HDMI_ISTS_CLK_CHANGE) ||
+	    (hdmi_ists & HDMI_ISTS_PLL_LCK_CHG) || md_ists) {
+		dw_hdmi_power_off(dw_dev);
+		if (has_signal(dw_dev, dw_dev->configured_input))
+			dw_hdmi_power_on(dw_dev, dw_dev->configured_input);
+	}
+
+#if IS_ENABLED(CONFIG_VIDEO_DWC_HDMI_RX_CEC)
+	dw_hdmi_cec_irq_handler(dw_dev);
+#endif
+
+	return IRQ_HANDLED;
+}
+
+static void dw_hdmi_detect_tx_5v(struct dw_hdmi_dev *dw_dev)
+{
+	unsigned int input_count = 4; /* TODO: Get from DT node this value */
+	unsigned int old_input = dw_dev->configured_input;
+	unsigned int new_input = old_input;
+	bool pending_config = false, current_on = true;
+	u32 stat = 0;
+	int i;
+
+	if (!has_signal(dw_dev, old_input)) {
+		dw_hdmi_disable_ints(dw_dev);
+		dw_hdmi_power_off(dw_dev);
+		current_on = false;
+	}
+
+	for (i = 0; i < input_count; i++) {
+		bool on = has_signal(dw_dev, i);
+		stat |= on << i;
+
+		if (is_off(dw_dev) && on && !pending_config) {
+			dw_hdmi_power_on(dw_dev, i);
+			dw_hdmi_set_input(dw_dev, i);
+			new_input = i;
+			pending_config = true;
+		}
+	}
+
+	if ((new_input == old_input) && !pending_config && !current_on)
+		dw_hdmi_phy_s_power(dw_dev, false);
+
+	if (stat) {
+		/*
+		 * If there are any connected ports enable the HPD and the SCDC
+		 * for these ports.
+		 */
+		dw_hdmi_enable_scdc(dw_dev);
+		dw_hdmi_enable_hpd(dw_dev, stat);
+	} else {
+		/*
+		 * If there are no connected ports disable whole HPD and SCDC
+		 * also.
+		 */
+		dw_hdmi_disable_hpd(dw_dev);
+		dw_hdmi_disable_scdc(dw_dev);
+	}
+
+	v4l2_ctrl_s_ctrl(dw_dev->detect_tx_5v_ctrl, stat);
+	dev_dbg(dw_dev->dev, "%s: stat=0x%x\n", __func__, stat);
+}
+
+static irqreturn_t dw_hdmi_5v_irq_handler(int irq, void *dev_data)
+{
+	struct dw_hdmi_dev *dw_dev = dev_data;
+
+	dw_hdmi_detect_tx_5v(dw_dev);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t dw_hdmi_5v_hard_irq_handler(int irq, void *dev_data)
+{
+	struct dw_hdmi_dev *dw_dev = dev_data;
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+	dw_hdmi_5v_clear(dw_dev);
+	return IRQ_WAKE_THREAD;
+}
+
+static int dw_hdmi_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
+		u32 config)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	if (!has_signal(dw_dev, input))
+		return -EINVAL;
+
+	dw_dev->selected_input = input;
+	if (input == dw_dev->configured_input)
+		return 0;
+
+	dw_hdmi_power_off(dw_dev);
+	return dw_hdmi_power_on(dw_dev, input);
+}
+
+static int dw_hdmi_g_input_status(struct v4l2_subdev *sd, u32 *status)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	*status = 0;
+	if (!has_signal(dw_dev, dw_dev->selected_input))
+		*status |= V4L2_IN_ST_NO_POWER;
+	if (is_off(dw_dev))
+		*status |= V4L2_IN_ST_NO_SIGNAL;
+
+	dev_dbg(dw_dev->dev, "%s: status=0x%x\n", __func__, *status);
+	return 0;
+}
+
+static int dw_hdmi_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parm)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+
+	/* TODO: Use helper to compute timeperframe */
+	parm->parm.capture.timeperframe.numerator = 1;
+	parm->parm.capture.timeperframe.denominator = 60;
+	return 0;
+}
+
+static int dw_hdmi_s_dv_timings(struct v4l2_subdev *sd,
+		struct v4l2_dv_timings *timings)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+	if (!v4l2_valid_dv_timings(timings, &dw_hdmi_timings_cap, NULL, NULL))
+		return -EINVAL;
+	if (v4l2_match_dv_timings(timings, &dw_dev->timings, 0, false))
+		return 0;
+
+	dw_dev->timings = *timings;
+	return 0;
+}
+
+static int dw_hdmi_g_dv_timings(struct v4l2_subdev *sd,
+		struct v4l2_dv_timings *timings)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+
+	*timings = dw_dev->timings;
+	return 0;
+}
+
+static int dw_hdmi_query_dv_timings(struct v4l2_subdev *sd,
+		struct v4l2_dv_timings *timings)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+	struct v4l2_bt_timings *bt = &timings->bt;
+	bool is_hdmi_vic;
+	u32 htot, hofs;
+	u32 vtot;
+	u8 vic;
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+
+	memset(timings, 0, sizeof(*timings));
+
+	timings->type = V4L2_DV_BT_656_1120;
+	bt->width = hdmi_readl(dw_dev, HDMI_MD_HACT_PX);
+	bt->height = hdmi_readl(dw_dev, HDMI_MD_VAL);
+	bt->interlaced = hdmi_readl(dw_dev, HDMI_MD_STS) & HDMI_MD_STS_ILACE ?
+		V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
+
+	if (hdmi_readl(dw_dev, HDMI_ISTS) & HDMI_ISTS_VS_POL_ADJ)
+		bt->polarities |= V4L2_DV_VSYNC_POS_POL;
+	if (hdmi_readl(dw_dev, HDMI_ISTS) & HDMI_ISTS_HS_POL_ADJ)
+		bt->polarities |= V4L2_DV_HSYNC_POS_POL;
+
+	bt->pixelclock = dw_hdmi_get_pixelclk(dw_dev);
+
+	/* HTOT = HACT + HFRONT + HSYNC + HBACK */
+	htot = hdmi_mask_readl(dw_dev, HDMI_MD_HT1,
+			HDMI_MD_HT1_HTOT_PIX_OFFSET,
+			HDMI_MD_HT1_HTOT_PIX_MASK);
+	/* HOFS = HSYNC + HBACK */
+	hofs = hdmi_mask_readl(dw_dev, HDMI_MD_HT1,
+			HDMI_MD_HT1_HOFS_PIX_OFFSET,
+			HDMI_MD_HT1_HOFS_PIX_MASK);
+
+	bt->hfrontporch = htot - hofs - bt->width;
+	bt->hsync = hdmi_mask_readl(dw_dev, HDMI_MD_HT0,
+			HDMI_MD_HT0_HS_CLK_OFFSET,
+			HDMI_MD_HT0_HS_CLK_MASK);
+	bt->hbackporch = hofs - bt->hsync;
+
+	/* VTOT = VACT + VFRONT + VSYNC + VBACK */
+	vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
+
+	hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
+			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
+			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
+	msleep(50); /* Wait for 1 field */
+	bt->vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
+
+	hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
+			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
+			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
+	msleep(50); /* Wait for 1 field */
+	bt->vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
+	bt->vfrontporch = vtot - bt->height - bt->vsync - bt->vbackporch;
+
+	if (bt->interlaced == V4L2_DV_INTERLACED) {
+		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
+				HDMI_MD_VCTRL_V_MODE_OFFSET,
+				HDMI_MD_VCTRL_V_MODE_MASK);
+		msleep(100); /* Wait for 2 fields */
+
+		vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
+		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
+				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
+				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
+		msleep(50); /* Wait for 1 field */
+		bt->il_vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
+
+		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
+				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
+				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
+		msleep(50);
+		bt->il_vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
+		bt->il_vfrontporch = vtot - bt->height - bt->il_vsync -
+			bt->il_vbackporch;
+
+		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
+				HDMI_MD_VCTRL_V_MODE_OFFSET,
+				HDMI_MD_VCTRL_V_MODE_MASK);
+	}
+
+	bt->standards = V4L2_DV_BT_STD_CEA861;
+
+	vic = dw_hdmi_get_curr_vic(dw_dev, &is_hdmi_vic);
+	if (vic) {
+		if (is_hdmi_vic) {
+			bt->flags |= V4L2_DV_FL_HAS_HDMI_VIC;
+			bt->hdmi_vic = vic;
+			bt->cea861_vic = 0;
+		} else {
+			bt->flags |= V4L2_DV_FL_HAS_CEA861_VIC;
+			bt->hdmi_vic = 0;
+			bt->cea861_vic = vic;
+		}
+	}
+
+	return 0;
+}
+
+static int dw_hdmi_enum_mbus_code(struct v4l2_subdev *sd,
+		struct v4l2_subdev_pad_config *cfg,
+		struct v4l2_subdev_mbus_code_enum *code)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+	if (code->index != 0)
+		return -EINVAL;
+
+	code->code = dw_dev->mbus_code;
+	return 0;
+}
+
+static int dw_hdmi_fill_format(struct dw_hdmi_dev *dw_dev,
+		struct v4l2_mbus_framefmt *format)
+{
+	memset(format, 0, sizeof(*format));
+
+	format->width = dw_dev->timings.bt.width;
+	format->height = dw_dev->timings.bt.height;
+	format->colorspace = V4L2_COLORSPACE_SRGB;
+	format->code = dw_dev->mbus_code;
+	format->field = V4L2_FIELD_NONE;
+	return 0;
+}
+
+static int dw_hdmi_get_fmt(struct v4l2_subdev *sd,
+		struct v4l2_subdev_pad_config *cfg,
+		struct v4l2_subdev_format *format)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+	return dw_hdmi_fill_format(dw_dev, &format->format);
+}
+
+static int dw_hdmi_set_fmt(struct v4l2_subdev *sd,
+		struct v4l2_subdev_pad_config *cfg,
+		struct v4l2_subdev_format *format)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+
+	if (format->format.code != dw_dev->mbus_code) {
+		dev_dbg(dw_dev->dev, "invalid format\n");
+		return -EINVAL;
+	}
+
+	return dw_hdmi_get_fmt(sd, cfg, format);
+}
+
+static int dw_hdmi_dv_timings_cap(struct v4l2_subdev *sd,
+		struct v4l2_dv_timings_cap *cap)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+	unsigned int pad = cap->pad;
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+
+	*cap = dw_hdmi_timings_cap;
+	cap->pad = pad;
+	return 0;
+}
+
+static int dw_hdmi_enum_dv_timings(struct v4l2_subdev *sd,
+		struct v4l2_enum_dv_timings *timings)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	dev_dbg(dw_dev->dev, "%s\n", __func__);
+	return v4l2_enum_dv_timings_cap(timings, &dw_hdmi_timings_cap,
+			NULL, NULL);
+}
+
+static int dw_hdmi_log_status(struct v4l2_subdev *sd)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+	struct v4l2_dv_timings timings;
+
+	v4l2_info(sd, "--- Chip configuration ---\n");
+	v4l2_info(sd, "cfg_clk=%dMHz\n", dw_dev->cfg_clk);
+	v4l2_info(sd, "phy_drv=%s, phy_jtag_addr=0x%x\n",
+			dw_dev->phy_sd ? "present" : "not present",
+			dw_dev->phy_jtag_addr);
+
+	v4l2_info(sd, "--- Chip status ---\n");
+	v4l2_info(sd, "selected_input=%d: signal=%d\n", dw_dev->selected_input,
+			has_signal(dw_dev, dw_dev->selected_input));
+	v4l2_info(sd, "configured_input=%d: signal=%d\n",
+			dw_dev->configured_input,
+			has_signal(dw_dev, dw_dev->configured_input));
+
+	v4l2_info(sd, "--- Video status ---\n");
+	v4l2_info(sd, "type=%s, color_depth=%dbits",
+			hdmi_readl(dw_dev, HDMI_PDEC_STS) &
+			HDMI_PDEC_STS_DVIDET ? "dvi" : "hdmi",
+			dw_hdmi_get_colordepth(dw_dev));
+
+	v4l2_info(sd, "--- Video timings ---\n");
+	if (dw_hdmi_query_dv_timings(sd, &timings))
+		v4l2_info(sd, "No video detected\n");
+	else
+		v4l2_print_dv_timings(sd->name, "Detected format: ",
+				&timings, true);
+	v4l2_print_dv_timings(sd->name, "Configured format: ",
+			&dw_dev->timings, true);
+
+	v4l2_ctrl_subdev_log_status(sd);
+	return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static void dw_hdmi_invalid_register(struct dw_hdmi_dev *dw_dev, u64 reg)
+{
+	dev_err(dw_dev->dev, "register 0x%llx not supported\n", reg);
+	dev_err(dw_dev->dev, "0x0000-0x7fff: Main controller map\n");
+	dev_err(dw_dev->dev, "0x8000-0x80ff: PHY map\n");
+}
+
+static bool dw_hdmi_is_reserved_register(struct dw_hdmi_dev *dw_dev, u32 reg)
+{
+	/*
+	 * NOTE: Some of the HDCP registers are write only. This means that
+	 * a read from these registers will never return and can block the bus
+	 * in some architectures. Disable the read to these registers and also
+	 * disable the write as a safety measure because userspace should not
+	 * be able to set HDCP registers.
+	 */
+	if (reg >= HDMI_HDCP_CTRL && reg <= HDMI_HDCP_STS)
+		return true;
+	if (reg == HDMI_HDCP22_CONTROL)
+		return true;
+	if (reg == HDMI_HDCP22_STATUS)
+		return true;
+	return false;
+}
+
+static int dw_hdmi_g_register(struct v4l2_subdev *sd,
+		struct v4l2_dbg_register *reg)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	switch (reg->reg >> 15) {
+	case 0: /* Controller core read */
+		if (dw_hdmi_is_reserved_register(dw_dev, reg->reg & 0x7fff))
+			return -EINVAL;
+
+		reg->size = 4;
+		reg->val = hdmi_readl(dw_dev, reg->reg & 0x7fff);
+		return 0;
+	case 1: /* PHY read */
+		if ((reg->reg & ~0xff) != BIT(15))
+			break;
+
+		reg->size = 2;
+		reg->val = dw_hdmi_phy_read(dw_dev, reg->reg & 0xff);
+		return 0;
+	default:
+		break;
+	}
+
+	dw_hdmi_invalid_register(dw_dev, reg->reg);
+	return 0;
+}
+
+static int dw_hdmi_s_register(struct v4l2_subdev *sd,
+		const struct v4l2_dbg_register *reg)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	switch (reg->reg >> 15) {
+	case 0: /* Controller core write */
+		if (dw_hdmi_is_reserved_register(dw_dev, reg->reg & 0x7fff))
+			return -EINVAL;
+
+		hdmi_writel(dw_dev, reg->val & GENMASK(31,0), reg->reg & 0x7fff);
+		return 0;
+	case 1: /* PHY write */
+		if ((reg->reg & ~0xff) != BIT(15))
+			break;
+		dw_hdmi_phy_write(dw_dev, reg->val & 0xffff, reg->reg & 0xff);
+		return 0;
+	default:
+		break;
+	}
+
+	dw_hdmi_invalid_register(dw_dev, reg->reg);
+	return 0;
+}
+#endif
+
+static int dw_hdmi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
+		struct v4l2_event_subscription *sub)
+{
+	switch (sub->type) {
+	case V4L2_EVENT_SOURCE_CHANGE:
+		return v4l2_src_change_event_subdev_subscribe(sd, fh, sub);
+	default:
+		return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub);
+	}
+}
+
+static int dw_hdmi_registered(struct v4l2_subdev *sd)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+	int ret;
+
+	ret = cec_register_adapter(dw_dev->cec_adap, dw_dev->dev);
+	if (ret) {
+		dev_err(dw_dev->dev, "failed to register CEC adapter\n");
+		cec_delete_adapter(dw_dev->cec_adap);
+		return ret;
+	}
+
+	cec_register_cec_notifier(dw_dev->cec_adap, dw_dev->cec_notifier);
+	dw_dev->registered = true;
+
+	return 0;
+}
+
+static void dw_hdmi_unregistered(struct v4l2_subdev *sd)
+{
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	cec_unregister_adapter(dw_dev->cec_adap);
+	cec_notifier_put(dw_dev->cec_notifier);
+	v4l2_async_notifier_unregister(&dw_dev->v4l2_notifier);
+}
+
+static const struct v4l2_subdev_core_ops dw_hdmi_sd_core_ops = {
+	.log_status = dw_hdmi_log_status,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	.g_register = dw_hdmi_g_register,
+	.s_register = dw_hdmi_s_register,
+#endif
+	.subscribe_event = dw_hdmi_subscribe_event,
+};
+
+static const struct v4l2_subdev_video_ops dw_hdmi_sd_video_ops = {
+	.s_routing = dw_hdmi_s_routing,
+	.g_input_status = dw_hdmi_g_input_status,
+	.g_parm = dw_hdmi_g_parm,
+	.s_dv_timings = dw_hdmi_s_dv_timings,
+	.g_dv_timings = dw_hdmi_g_dv_timings,
+	.query_dv_timings = dw_hdmi_query_dv_timings,
+};
+
+static const struct v4l2_subdev_pad_ops dw_hdmi_sd_pad_ops = {
+	.enum_mbus_code = dw_hdmi_enum_mbus_code,
+	.get_fmt = dw_hdmi_get_fmt,
+	.set_fmt = dw_hdmi_set_fmt,
+	.dv_timings_cap = dw_hdmi_dv_timings_cap,
+	.enum_dv_timings = dw_hdmi_enum_dv_timings,
+};
+
+static const struct v4l2_subdev_ops dw_hdmi_sd_ops = {
+	.core = &dw_hdmi_sd_core_ops,
+	.video = &dw_hdmi_sd_video_ops,
+	.pad = &dw_hdmi_sd_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops dw_hdmi_internal_ops = {
+	.registered = dw_hdmi_registered,
+	.unregistered = dw_hdmi_unregistered,
+};
+
+static int dw_hdmi_v4l2_notify_bound(struct v4l2_async_notifier *notifier,
+		struct v4l2_subdev *subdev, struct v4l2_async_subdev *asd)
+{
+	struct dw_hdmi_dev *dw_dev = notifier_to_dw_dev(notifier);
+
+	if (dw_dev->phy_async_sd.match.fwnode.fwnode == dev_fwnode(subdev->dev)) {
+		dev_dbg(dw_dev->dev, "found new subdev '%s'\n", subdev->name);
+		dw_dev->phy_sd = subdev;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static void dw_hdmi_v4l2_notify_unbind(struct v4l2_async_notifier *notifier,
+		struct v4l2_subdev *subdev, struct v4l2_async_subdev *asd)
+{
+	struct dw_hdmi_dev *dw_dev = notifier_to_dw_dev(notifier);
+
+	if (dw_dev->phy_sd == subdev) {
+		dev_dbg(dw_dev->dev, "unbinding '%s'\n", subdev->name);
+		dw_dev->phy_sd = NULL;
+	}
+}
+
+static const struct v4l2_async_notifier_operations dw_hdmi_notifier_ops = {
+	.bound = dw_hdmi_v4l2_notify_bound,
+	.unbind = dw_hdmi_v4l2_notify_unbind,
+};
+
+static int dw_hdmi_v4l2_init_notifier(struct dw_hdmi_dev *dw_dev)
+{
+	struct v4l2_async_subdev **subdevs = NULL;
+	struct device_node *child = NULL;
+
+	subdevs = devm_kzalloc(dw_dev->dev, sizeof(*subdevs), GFP_KERNEL);
+	if (!subdevs)
+		return -ENOMEM;
+
+	child = dw_hdmi_get_phy_of_node(dw_dev, NULL);
+	if (!child)
+		return -EINVAL;
+
+	dw_dev->phy_async_sd.match.fwnode.fwnode = of_fwnode_handle(child);
+	dw_dev->phy_async_sd.match_type = V4L2_ASYNC_MATCH_FWNODE;
+
+	subdevs[0] = &dw_dev->phy_async_sd;
+	dw_dev->v4l2_notifier.num_subdevs = 1;
+	dw_dev->v4l2_notifier.subdevs = subdevs;
+	dw_dev->v4l2_notifier.ops = &dw_hdmi_notifier_ops;
+	return 0;
+}
+
+static int dw_hdmi_parse_notifier(struct dw_hdmi_dev *dw_dev)
+{
+#if IS_ENABLED(CONFIG_VIDEO_DWC_HDMI_RX_CEC)
+	struct device_node *notifier, *np = dw_dev->of_node;
+
+	/* Notifier device parsing */
+	notifier = of_parse_phandle(np, "edid-phandle", 0);
+	if (!notifier && dw_dev->dev->parent)
+		notifier = dw_dev->dev->parent->of_node;
+
+	if (!notifier) {
+		dev_err(dw_dev->dev, "missing edid-phandle in DT\n");
+		return -EINVAL;
+	}
+
+	dw_dev->notifier_pdev = of_find_device_by_node(notifier);
+	if (!dw_dev->notifier_pdev)
+		return -EPROBE_DEFER;
+
+	return 0;
+#else
+	return 0;
+#endif
+}
+
+static int dw_hdmi_parse_dt(struct dw_hdmi_dev *dw_dev)
+{
+	struct device_node *phy_node, *np = dw_dev->of_node;
+	u32 tmp;
+	int ret;
+
+	if (!np) {
+		dev_err(dw_dev->dev, "missing DT node\n");
+		return -EINVAL;
+	}
+
+	/* PHY properties parsing */
+	phy_node = dw_hdmi_get_phy_of_node(dw_dev, NULL);
+	of_property_read_u32(phy_node, "reg", &tmp);
+
+	dw_dev->phy_jtag_addr = tmp & 0xff;
+	if (!dw_dev->phy_jtag_addr) {
+		dev_err(dw_dev->dev, "missing phy jtag address in DT\n");
+		return -EINVAL;
+	}
+
+	/* Get config clock value */
+	dw_dev->clk = devm_clk_get(dw_dev->dev, "cfg");
+	if (IS_ERR(dw_dev->clk)) {
+		dev_err(dw_dev->dev, "failed to get cfg clock\n");
+		return PTR_ERR(dw_dev->clk);
+	}
+
+	ret = clk_prepare_enable(dw_dev->clk);
+	if (ret) {
+		dev_err(dw_dev->dev, "failed to enable cfg clock\n");
+		return ret;
+	}
+
+	dw_dev->cfg_clk = clk_get_rate(dw_dev->clk) / 1000000U;
+	if (!dw_dev->cfg_clk) {
+		dev_err(dw_dev->dev, "invalid cfg clock frequency\n");
+		ret = -EINVAL;
+		goto err_clk;
+	}
+
+	ret = dw_hdmi_parse_notifier(dw_dev);
+	if (ret)
+		goto err_clk;
+
+	return 0;
+
+err_clk:
+	clk_disable_unprepare(dw_dev->clk);
+	return ret;
+}
+
+static int dw_hdmi_rx_probe(struct platform_device *pdev)
+{
+	const struct v4l2_dv_timings timings_def = HDMI_DEFAULT_TIMING;
+	struct dw_hdmi_rx_pdata *pdata = pdev->dev.platform_data;
+	struct device *dev = &pdev->dev;
+	struct v4l2_ctrl_handler *hdl;
+	struct dw_hdmi_dev *dw_dev;
+	struct v4l2_subdev *sd;
+	struct resource *res;
+	int ret, irq;
+
+	dev_dbg(dev, "%s\n", __func__);
+
+	dw_dev = devm_kzalloc(dev, sizeof(*dw_dev), GFP_KERNEL);
+	if (!dw_dev)
+		return -ENOMEM;
+
+	if (!pdata) {
+		dev_err(dev, "missing platform data\n");
+		return -EINVAL;
+	}
+
+	dw_dev->dev = dev;
+	dw_dev->config = pdata;
+	dw_dev->state = HDMI_STATE_NO_INIT;
+	dw_dev->of_node = dev->of_node;
+	spin_lock_init(&dw_dev->lock);
+
+	ret = dw_hdmi_parse_dt(dw_dev);
+	if (ret)
+		return ret;
+
+	/* Deferred work */
+	dw_dev->wq = create_singlethread_workqueue(DW_HDMI_RX_DRVNAME);
+	if (!dw_dev->wq) {
+		dev_err(dev, "failed to create workqueue\n");
+		return -ENOMEM;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	dw_dev->regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(dw_dev->regs)) {
+		dev_err(dev, "failed to remap resource\n");
+		ret = PTR_ERR(dw_dev->regs);
+		goto err_wq;
+	}
+
+	/* Disable HPD as soon as posssible */
+	dw_hdmi_disable_hpd(dw_dev);
+	/* Prevent HDCP from tampering video */
+	dw_hdmi_config_hdcp(dw_dev);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		ret = irq;
+		goto err_wq;
+	}
+
+	ret = devm_request_threaded_irq(dev, irq, NULL, dw_hdmi_irq_handler,
+			IRQF_ONESHOT, DW_HDMI_RX_DRVNAME, dw_dev);
+	if (ret)
+		goto err_wq;
+
+	/* V4L2 initialization */
+	sd = &dw_dev->sd;
+	v4l2_subdev_init(sd, &dw_hdmi_sd_ops);
+	strlcpy(sd->name, dev_name(dev), sizeof(sd->name));
+	sd->dev = dev;
+	sd->internal_ops = &dw_hdmi_internal_ops;
+	sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+	/* Control handlers */
+	hdl = &dw_dev->hdl;
+	v4l2_ctrl_handler_init(hdl, 1);
+	dw_dev->detect_tx_5v_ctrl = v4l2_ctrl_new_std(hdl, NULL,
+			V4L2_CID_DV_RX_POWER_PRESENT, 0, BIT(4) - 1, 0, 0);
+
+	sd->ctrl_handler = hdl;
+	if (hdl->error) {
+		ret = hdl->error;
+		goto err_hdl;
+	}
+
+	/* Wait for ctrl handler register before requesting 5v interrupt */
+	irq = platform_get_irq(pdev, 1);
+	if (irq < 0) {
+		ret = irq;
+		goto err_hdl;
+	}
+
+	ret = devm_request_threaded_irq(dev, irq, dw_hdmi_5v_hard_irq_handler,
+			dw_hdmi_5v_irq_handler, IRQF_ONESHOT,
+			DW_HDMI_RX_DRVNAME "-5v-handler", dw_dev);
+	if (ret)
+		goto err_hdl;
+
+	/* Notifier for subdev binding */
+	ret = dw_hdmi_v4l2_init_notifier(dw_dev);
+	if (ret) {
+		dev_err(dev, "failed to init v4l2 notifier\n");
+		goto err_hdl;
+	}
+
+	/* PHY loading */
+	ret = dw_hdmi_phy_init(dw_dev);
+	if (ret)
+		goto err_hdl;
+
+	/* CEC */
+#if IS_ENABLED(CONFIG_VIDEO_DWC_HDMI_RX_CEC)
+	dw_dev->cec_adap = cec_allocate_adapter(&dw_hdmi_cec_adap_ops,
+			dw_dev, dev_name(dev), CEC_CAP_DEFAULTS,
+			HDMI_CEC_MAX_LOG_ADDRS);
+	ret = PTR_ERR_OR_ZERO(dw_dev->cec_adap);
+	if (ret) {
+		dev_err(dev, "failed to allocate CEC adapter\n");
+		goto err_cec;
+	}
+
+	dw_dev->cec_notifier = cec_notifier_get(&dw_dev->notifier_pdev->dev);
+	if (!dw_dev->cec_notifier) {
+		dev_err(dev, "failed to allocate CEC notifier\n");
+		ret = -ENOMEM;
+		goto err_cec;
+	}
+
+	dev_info(dev, "CEC is enabled\n");
+#else
+	dev_info(dev, "CEC is disabled\n");
+#endif
+
+	ret = v4l2_async_register_subdev(sd);
+	if (ret) {
+		dev_err(dev, "failed to register subdev\n");
+		goto err_cec;
+	}
+
+	ret = v4l2_async_subdev_notifier_register(sd, &dw_dev->v4l2_notifier);
+	if (ret) {
+		dev_err(dev, "failed to register notifier\n");
+		goto err_subdev;
+	}
+
+	/* Fill initial format settings */
+	dw_dev->timings = timings_def;
+	dw_dev->mbus_code = MEDIA_BUS_FMT_BGR888_1X24;
+
+	dev_set_drvdata(dev, sd);
+	dw_dev->state = HDMI_STATE_POWER_OFF;
+	dw_hdmi_detect_tx_5v(dw_dev);
+	dev_dbg(dev, "driver probed\n");
+	return 0;
+
+err_subdev:
+	v4l2_async_unregister_subdev(sd);
+err_cec:
+	cec_delete_adapter(dw_dev->cec_adap);
+	dw_hdmi_phy_exit(dw_dev);
+err_hdl:
+	v4l2_ctrl_handler_free(hdl);
+err_wq:
+	destroy_workqueue(dw_dev->wq);
+	return ret;
+}
+
+static int dw_hdmi_rx_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct v4l2_subdev *sd = dev_get_drvdata(dev);
+	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
+
+	dw_hdmi_disable_ints(dw_dev);
+	dw_hdmi_disable_hpd(dw_dev);
+	dw_hdmi_disable_scdc(dw_dev);
+	dw_hdmi_power_off(dw_dev);
+	dw_hdmi_phy_s_power(dw_dev, false);
+	flush_workqueue(dw_dev->wq);
+	destroy_workqueue(dw_dev->wq);
+	dw_hdmi_phy_exit(dw_dev);
+	v4l2_async_notifier_unregister(&dw_dev->v4l2_notifier);
+	v4l2_async_unregister_subdev(sd);
+	v4l2_ctrl_handler_free(sd->ctrl_handler);
+	clk_disable_unprepare(dw_dev->clk);
+	dev_dbg(dev, "driver removed\n");
+	return 0;
+}
+
+static const struct of_device_id dw_hdmi_rx_id[] = {
+	{ .compatible = "snps,dw-hdmi-rx" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, dw_hdmi_rx_id);
+
+static struct platform_driver dw_hdmi_rx_driver = {
+	.probe = dw_hdmi_rx_probe,
+	.remove = dw_hdmi_rx_remove,
+	.driver = {
+		.name = DW_HDMI_RX_DRVNAME,
+		.of_match_table = dw_hdmi_rx_id,
+	}
+};
+module_platform_driver(dw_hdmi_rx_driver);
diff --git a/drivers/media/platform/dwc/dw-hdmi-rx.h b/drivers/media/platform/dwc/dw-hdmi-rx.h
new file mode 100644
index 0000000..17b1d31
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-hdmi-rx.h
@@ -0,0 +1,419 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// Copyright (c) 2017 Synopsys, Inc. and/or its affiliates.
+// Synopsys DesignWare HDMI Receiver controller driver
+
+#ifndef __DW_HDMI_RX_H__
+#define __DW_HDMI_RX_H__
+
+#include <linux/bitops.h>
+
+/* id_hdmi Registers */
+#define HDMI_SETUP_CTRL				0x0000
+#define HDMI_PLL_LCK_STS			0x0030
+#define HDMI_CKM_EVLTM				0x0094
+#define HDMI_CKM_RESULT				0x009c
+#define HDMI_STS				0x00bc
+
+/* id_hdcp_1_4 Registers */
+#define HDMI_HDCP_CTRL				0x00c0
+#define HDMI_HDCP_SETTINGS			0x00c4
+#define HDMI_HDCP_SEED				0x00c8
+#define HDMI_HDCP_BKSV1				0x00cc
+#define HDMI_HDCP_BKSV0				0x00d0
+#define HDMI_HDCP_KIDX				0x00d4
+#define HDMI_HDCP_KEY1				0x00d8
+#define HDMI_HDCP_KEY0				0x00dc
+#define HDMI_HDCP_DBG				0x00e0
+#define HDMI_HDCP_AKSV1				0x00e4
+#define HDMI_HDCP_AKSV0				0x00e8
+#define HDMI_HDCP_AN1				0x00ec
+#define HDMI_HDCP_AN0				0x00f0
+#define HDMI_HDCP_EESS_WOO			0x00f4
+#define HDMI_HDCP_I2C_TIMEOUT			0x00f8
+#define HDMI_HDCP_STS				0x00fc
+
+/* id_mode_detection Registers */
+#define HDMI_MD_HT0				0x0148
+#define HDMI_MD_HT1				0x014c
+#define HDMI_MD_HACT_PX				0x0150
+#define HDMI_MD_VCTRL				0x0158
+#define HDMI_MD_VOL				0x0164
+#define HDMI_MD_VAL				0x0168
+#define HDMI_MD_VTL				0x0170
+#define HDMI_MD_STS				0x0180
+
+/* id_phy_configuration Registers */
+#define HDMI_PHY_CTRL				0x02c0
+#define HDMI_PHY_JTAG_CONF			0x02ec
+#define HDMI_PHY_JTAG_TAP_TCLK			0x02f0
+#define HDMI_PHY_JTAG_TAP_IN			0x02f4
+#define HDMI_PHY_JTAG_TAP_OUT			0x02f8
+#define HDMI_PHY_JTAG_ADDR			0x02fc
+
+/* id_packet_decoder Registers */
+#define HDMI_PDEC_STS				0x0360
+#define HDMI_PDEC_VSI_PAYLOAD0			0x0368
+#define HDMI_PDEC_AVI_PB			0x03a4
+
+/* id_hdmi_2_0 Registers */
+#define HDMI_SCDC_CONFIG			0x0808
+#define HDMI_HDCP22_CONTROL			0x081c
+#define HDMI_HDCP22_STATUS			0x08fc
+
+/* id_audio_and_cec_interrupt Registers */
+#define HDMI_AUD_CEC_IEN_CLR			0x0f90
+#define HDMI_AUD_CEC_IEN_SET			0x0f94
+#define HDMI_AUD_CEC_ISTS			0x0f98
+#define HDMI_AUD_CEC_IEN			0x0f9c
+#define HDMI_AUD_CEC_ICLR			0x0fa0
+#define HDMI_AUD_CEC_ISET			0x0fa4
+
+/* id_mode_detection_interrupt Registers */
+#define HDMI_MD_IEN_CLR				0x0fc0
+#define HDMI_MD_IEN_SET				0x0fc4
+#define HDMI_MD_ISTS				0x0fc8
+#define HDMI_MD_IEN				0x0fcc
+#define HDMI_MD_ICLR				0x0fd0
+#define HDMI_MD_ISET				0x0fd4
+
+/* id_hdmi_interrupt Registers */
+#define HDMI_IEN_CLR				0x0fd8
+#define HDMI_IEN_SET				0x0fdc
+#define HDMI_ISTS				0x0fe0
+#define HDMI_IEN				0x0fe4
+#define HDMI_ICLR				0x0fe8
+#define HDMI_ISET				0x0fec
+
+/* id_dmi Registers */
+#define HDMI_DMI_SW_RST				0x0ff0
+
+/* id_cec Registers */
+#define HDMI_CEC_CTRL				0x1f00
+#define HDMI_CEC_MASK				0x1f08
+#define HDMI_CEC_ADDR_L				0x1f14
+#define HDMI_CEC_ADDR_H				0x1f18
+#define HDMI_CEC_TX_CNT				0x1f1c
+#define HDMI_CEC_RX_CNT				0x1f20
+#define HDMI_CEC_TX_DATA(i)			(0x1f40 + ((i) * 4))
+#define HDMI_CEC_TX_DATA_MAX			16
+#define HDMI_CEC_RX_DATA(i)			(0x1f80 + ((i) * 4))
+#define HDMI_CEC_RX_DATA_MAX			16
+#define HDMI_CEC_LOCK				0x1fc0
+#define HDMI_CEC_WAKEUPCTRL			0x1fc4
+
+/* id_cbus Registers */
+#define HDMI_CBUSIOCTRL				0x3020
+
+enum {
+	/* SETUP_CTRL field values */
+	HDMI_SETUP_CTRL_HOT_PLUG_DETECT_INPUT_X_MASK = GENMASK(27,24),
+	HDMI_SETUP_CTRL_HOT_PLUG_DETECT_INPUT_X_OFFSET = 24,
+	HDMI_SETUP_CTRL_HDMIBUS_RESET_OVR_EN_MASK = BIT(21),
+	HDMI_SETUP_CTRL_HDMIBUS_RESET_OVR_EN_OFFSET = 21,
+	HDMI_SETUP_CTRL_BUS_RESET_OVR_MASK = BIT(20),
+	HDMI_SETUP_CTRL_BUS_RESET_OVR_OFFSET = 20,
+	HDMI_SETUP_CTRL_HDMI_RESET_OVR_MASK = BIT(19),
+	HDMI_SETUP_CTRL_HDMI_RESET_OVR_OFFSET = 19,
+	HDMI_SETUP_CTRL_PON_RESET_OVR_MASK = BIT(18),
+	HDMI_SETUP_CTRL_PON_RESET_OVR_OFFSET = 18,
+	HDMI_SETUP_CTRL_RESET_OVR_MASK = BIT(17),
+	HDMI_SETUP_CTRL_RESET_OVR_OFFSET = 17,
+	HDMI_SETUP_CTRL_RESET_OVR_EN_MASK = BIT(16),
+	HDMI_SETUP_CTRL_RESET_OVR_EN_OFFSET = 16,
+	HDMI_SETUP_CTRL_EQ_OSM_OVR_MASK = BIT(15),
+	HDMI_SETUP_CTRL_EQ_OSM_OVR_OFFSET = 15,
+	HDMI_SETUP_CTRL_EQ_OSM_OVR_EN_MASK = BIT(14),
+	HDMI_SETUP_CTRL_EQ_OSM_OVR_EN_OFFSET = 14,
+	HDMI_SETUP_CTRL_NOWAIT_ACTIVITY_MASK = BIT(13),
+	HDMI_SETUP_CTRL_NOWAIT_ACTIVITY_OFFSET = 13,
+	HDMI_SETUP_CTRL_EQ_CAL_TIME_MASK = GENMASK(12,7),
+	HDMI_SETUP_CTRL_EQ_CAL_TIME_OFFSET = 7,
+	HDMI_SETUP_CTRL_USE_PLL_LOCK_MASK = BIT(6),
+	HDMI_SETUP_CTRL_USE_PLL_LOCK_OFFSET = 6,
+	HDMI_SETUP_CTRL_FORCE_STATE_MASK = BIT(5),
+	HDMI_SETUP_CTRL_FORCE_STATE_OFFSET = 5,
+	HDMI_SETUP_CTRL_TARGET_STATE_MASK = GENMASK(4,1),
+	HDMI_SETUP_CTRL_TARGET_STATE_OFFSET = 1,
+	HDMI_SETUP_CTRL_HOT_PLUG_DETECT_MASK = BIT(0),
+	HDMI_SETUP_CTRL_HOT_PLUG_DETECT_OFFSET = 0,
+	/* PLL_LCK_STS field values */
+	HDMI_PLL_LCK_STS_PLL_LOCKED = BIT(0),
+	/* CKM_EVLTM field values */
+	HDMI_CKM_EVLTM_LOCK_HYST_MASK = GENMASK(21,20),
+	HDMI_CKM_EVLTM_LOCK_HYST_OFFSET = 20,
+	HDMI_CKM_EVLTM_CLK_HYST_MASK = GENMASK(18,16),
+	HDMI_CKM_EVLTM_CLK_HYST_OFFSET = 16,
+	HDMI_CKM_EVLTM_EVAL_TIME_MASK = GENMASK(15,4),
+	HDMI_CKM_EVLTM_EVAL_TIME_OFFSET = 4,
+	HDMI_CKM_EVLTM_CLK_MEAS_INPUT_SRC_MASK = BIT(0),
+	HDMI_CKM_EVLTM_CLK_MEAS_INPUT_SRC_OFFSET = 0,
+	/* CKM_RESULT field values */
+	HDMI_CKM_RESULT_CLOCK_IN_RANGE = BIT(17),
+	HDMI_CKM_RESULT_FREQ_LOCKED = BIT(16),
+	HDMI_CKM_RESULT_CLKRATE_MASK = GENMASK(15,0),
+	HDMI_CKM_RESULT_CLKRATE_OFFSET = 0,
+	/* STS field values */
+	HDMI_STS_DCM_CURRENT_MODE_MASK = GENMASK(31,28),
+	HDMI_STS_DCM_CURRENT_MODE_OFFSET = 28,
+	HDMI_STS_DCM_LAST_PIXEL_PHASE_STS_MASK = GENMASK(27,24),
+	HDMI_STS_DCM_LAST_PIXEL_PHASE_STS_OFFSET = 24,
+	HDMI_STS_DCM_PHASE_DIFF_CNT_MASK = GENMASK(23,16),
+	HDMI_STS_DCM_PH_DIFF_CNT_OVERFL = BIT(15),
+	HDMI_STS_DCM_GCP_ZERO_FIELDS_PASS = BIT(14),
+	HDMI_STS_CTL3_STS = BIT(13),
+	HDMI_STS_CTL2_STS = BIT(12),
+	HDMI_STS_CTL1_STS = BIT(11),
+	HDMI_STS_CTL0_STS = BIT(10),
+	HDMI_STS_VS_POL_ADJ_STS = BIT(9),
+	HDMI_STS_HS_POL_ADJ_STS = BIT(8),
+	HDMI_STS_RES_OVERLOAD_STS = BIT(7),
+	HDMI_STS_DCM_CURRENT_PP_MASK = GENMASK(3,0),
+	HDMI_STS_DCM_CURRENT_PP_OFFSET = 0,
+	/* HDCP_CTRL field values */
+	HDMI_HDCP_CTRL_ENDISLOCK_MASK = BIT(25),
+	HDMI_HDCP_CTRL_ENDISLOCK_OFFSET = 25,
+	HDMI_HDCP_CTRL_ENABLE_MASK = BIT(24),
+	HDMI_HDCP_CTRL_ENABLE_OFFSET = 24,
+	HDMI_HDCP_CTRL_FREEZE_HDCP_FSM_MASK = BIT(21),
+	HDMI_HDCP_CTRL_FREEZE_HDCP_FSM_OFFSET = 21,
+	HDMI_HDCP_CTRL_FREEZE_HDCP_STATE_MASK = GENMASK(20,15),
+	HDMI_HDCP_CTRL_FREEZE_HDCP_STATE_OFFSET = 15,
+	HDMI_HDCP_CTRL_VID_DE_MASK = BIT(14),
+	HDMI_HDCP_CTRL_VID_DE_OFFSET = 14,
+	HDMI_HDCP_CTRL_SEL_AVMUTE_MASK = GENMASK(11,10),
+	HDMI_HDCP_CTRL_SEL_AVMUTE_OFFSET = 10,
+	HDMI_HDCP_CTRL_CTL_MASK = GENMASK(9,8),
+	HDMI_HDCP_CTRL_CTL_OFFSET = 8,
+	HDMI_HDCP_CTRL_RI_RATE_MASK = GENMASK(7,6),
+	HDMI_HDCP_CTRL_RI_RATE_OFFSET = 6,
+	HDMI_HDCP_CTRL_HDMI_MODE_ENABLE_MASK = BIT(2),
+	HDMI_HDCP_CTRL_HDMI_MODE_ENABLE_OFFSET = 2,
+	HDMI_HDCP_CTRL_KEY_DECRYPT_ENABLE_MASK = BIT(1),
+	HDMI_HDCP_CTRL_KEY_DECRYPT_ENABLE_OFFSET = 1,
+	HDMI_HDCP_CTRL_ENC_EN_MASK = BIT(0),
+	HDMI_HDCP_CTRL_ENC_EN_OFFSET = 0,
+	/* HDCP_SEED field values */
+	HDMI_HDCP_SEED_KEY_DECRYPT_SEED_MASK = GENMASK(15,0),
+	HDMI_HDCP_SEED_KEY_DECRYPT_SEED_OFFSET = 0,
+	/* HDCP_STS field values */
+	HDMI_HDCP_STS_ENC_STATE = BIT(9),
+	HDMI_HDCP_STS_AUTH_START = BIT(8),
+	HDMI_HDCP_STS_KEY_WR_OK = BIT(0),
+	/* MD_HT0 field values */
+	HDMI_MD_HT0_HTOT32_CLK_MASK = GENMASK(31,16),
+	HDMI_MD_HT0_HTOT32_CLK_OFFSET = 16,
+	HDMI_MD_HT0_HS_CLK_MASK = GENMASK(15,0),
+	HDMI_MD_HT0_HS_CLK_OFFSET = 0,
+	/* MD_HT1 field values */
+	HDMI_MD_HT1_HTOT_PIX_MASK = GENMASK(31,16),
+	HDMI_MD_HT1_HTOT_PIX_OFFSET = 16,
+	HDMI_MD_HT1_HOFS_PIX_MASK = GENMASK(15,0),
+	HDMI_MD_HT1_HOFS_PIX_OFFSET = 0,
+	/* MD_VCTRL field values */
+	HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK = BIT(4),
+	HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET = 4,
+	HDMI_MD_VCTRL_V_EDGE_MASK = BIT(1),
+	HDMI_MD_VCTRL_V_EDGE_OFFSET = 1,
+	HDMI_MD_VCTRL_V_MODE_MASK = BIT(0),
+	HDMI_MD_VCTRL_V_MODE_OFFSET = 0,
+	/* MD_STS field values */
+	HDMI_MD_STS_ILACE = BIT(3),
+	HDMI_MD_STS_DE_ACTIVITY = BIT(2),
+	HDMI_MD_STS_VS_ACT = BIT(1),
+	HDMI_MD_STS_HS_ACT = BIT(0),
+	/* PHY_CTRL field values */
+	HDMI_PHY_CTRL_SVSRETMODEZ_MASK = BIT(6),
+	HDMI_PHY_CTRL_SVSRETMODEZ_OFFSET = 6,
+	HDMI_PHY_CTRL_CFGCLKFREQ_MASK = GENMASK(5,4),
+	HDMI_PHY_CTRL_CFGCLKFREQ_OFFSET = 4,
+	HDMI_PHY_CTRL_PORTSELECT_MASK = GENMASK(3,2),
+	HDMI_PHY_CTRL_PORTSELECT_OFFSET = 2,
+	HDMI_PHY_CTRL_PDDQ_MASK = BIT(1),
+	HDMI_PHY_CTRL_PDDQ_OFFSET = 1,
+	HDMI_PHY_CTRL_RESET_MASK = BIT(0),
+	HDMI_PHY_CTRL_RESET_OFFSET = 0,
+	/* PHY_JTAG_TAP_IN field values */
+	HDMI_PHY_JTAG_TAP_IN_TMS = BIT(4),
+	HDMI_PHY_JTAG_TAP_IN_TDI = BIT(0),
+	/* PDEC_STS field values */
+	HDMI_PDEC_STS_DRM_CKS_CHG = BIT(31),
+	HDMI_PDEC_STS_DRM_RCV = BIT(30),
+	HDMI_PDEC_STS_NTSCVBI_CKS_CHG = BIT(29),
+	HDMI_PDEC_STS_DVIDET = BIT(28),
+	HDMI_PDEC_STS_VSI_CKS_CHG = BIT(27),
+	HDMI_PDEC_STS_GMD_CKS_CHG = BIT(26),
+	HDMI_PDEC_STS_AIF_CKS_CHG = BIT(25),
+	HDMI_PDEC_STS_AVI_CKS_CHG = BIT(24),
+	HDMI_PDEC_STS_ACR_N_CHG = BIT(23),
+	HDMI_PDEC_STS_ACR_CTS_CHG = BIT(22),
+	HDMI_PDEC_STS_GCP_AV_MUTE_CHG = BIT(21),
+	HDMI_PDEC_STS_GMD_RCV = BIT(20),
+	HDMI_PDEC_STS_AIF_RCV = BIT(19),
+	HDMI_PDEC_STS_AVI_RCV = BIT(18),
+	HDMI_PDEC_STS_ACR_RCV = BIT(17),
+	HDMI_PDEC_STS_GCP_RCV = BIT(16),
+	HDMI_PDEC_STS_VSI_RCV = BIT(15),
+	HDMI_PDEC_STS_AMP_RCV = BIT(14),
+	HDMI_PDEC_STS_NTSCVBI_RCV = BIT(13),
+	HDMI_PDEC_STS_OBA_LAYOUT = BIT(12),
+	HDMI_PDEC_STS_AUDS_LAYOUT = BIT(11),
+	HDMI_PDEC_STS_PD_FIFO_NEW_ENTRY = BIT(8),
+	HDMI_PDEC_STS_PD_FIFO_OVERFL = BIT(4),
+	HDMI_PDEC_STS_PD_FIFO_UNDERFL = BIT(3),
+	HDMI_PDEC_STS_PD_FIFO_TH_START_PASS = BIT(2),
+	HDMI_PDEC_STS_PD_FIFO_TH_MAX_PASS = BIT(1),
+	HDMI_PDEC_STS_PD_FIFO_TH_MIN_PASS = BIT(0),
+	/* PDEC_VSI_PAYLOAD0 field values */
+	HDMI_PDEC_VSI_PAYLOAD0_HDMI_VIC_MASK = GENMASK(15,8),
+	HDMI_PDEC_VSI_PAYLOAD0_HDMI_VIC_OFFSET = 8,
+	/* PDEC_AVI_PB field values */
+	HDMI_PDEC_AVI_PB_VID_IDENT_CODE_MASK = GENMASK(31,24),
+	HDMI_PDEC_AVI_PB_VID_IDENT_CODE_OFFSET = 24,
+	HDMI_PDEC_AVI_PB_IT_CONTENT = BIT(23),
+	HDMI_PDEC_AVI_PB_EXT_COLORIMETRY_MASK = GENMASK(22,20),
+	HDMI_PDEC_AVI_PB_EXT_COLORIMETRY_OFFSET = 20,
+	HDMI_PDEC_AVI_PB_RGB_QUANT_RANGE_MASK = GENMASK(19,18),
+	HDMI_PDEC_AVI_PB_RGB_QUANT_RANGE_OFFSET = 18,
+	HDMI_PDEC_AVI_PB_NON_UNIF_SCALE_MASK = GENMASK(17,16),
+	HDMI_PDEC_AVI_PB_NON_UNIF_SCALE_OFFSET = 16,
+	HDMI_PDEC_AVI_PB_COLORIMETRY_MASK = GENMASK(15,14),
+	HDMI_PDEC_AVI_PB_COLORIMETRY_OFFSET = 14,
+	HDMI_PDEC_AVI_PB_PIC_ASPECT_RAT_MASK = GENMASK(13,12),
+	HDMI_PDEC_AVI_PB_PIC_ASPECT_RAT_OFFSET = 12,
+	HDMI_PDEC_AVI_PB_ACT_ASPECT_RAT_MASK = GENMASK(11,8),
+	HDMI_PDEC_AVI_PB_ACT_ASPECT_RAT_OFFSET = 8,
+	HDMI_PDEC_AVI_PB_VIDEO_FORMAT_MASK = GENMASK(7,5),
+	HDMI_PDEC_AVI_PB_VIDEO_FORMAT_OFFSET = 5,
+	HDMI_PDEC_AVI_PB_ACT_INFO_PRESENT = BIT(4),
+	HDMI_PDEC_AVI_PB_BAR_INFO_VALID_MASK = GENMASK(3,2),
+	HDMI_PDEC_AVI_PB_BAR_INFO_VALID_OFFSET = 2,
+	HDMI_PDEC_AVI_PB_SCAN_INFO_MASK = GENMASK(1,0),
+	HDMI_PDEC_AVI_PB_SCAN_INFO_OFFSET = 0,
+	/* SCDC_CONFIG field values */
+	HDMI_SCDC_CONFIG_HPDLOW_MASK = BIT(1),
+	HDMI_SCDC_CONFIG_HPDLOW_OFFSET = 1,
+	HDMI_SCDC_CONFIG_POWERPROVIDED_MASK = BIT(0),
+	HDMI_SCDC_CONFIG_POWERPROVIDED_OFFSET = 0,
+	/* HDCP22_CONTROL field values */
+	HDMI_HDCP22_CONTROL_CD_OVR_VAL_MASK = GENMASK(23,20),
+	HDMI_HDCP22_CONTROL_CD_OVR_VAL_OFFSET = 20,
+	HDMI_HDCP22_CONTROL_CD_OVR_EN_MASK = BIT(16),
+	HDMI_HDCP22_CONTROL_CD_OVR_EN_OFFSET = 16,
+	HDMI_HDCP22_CONTROL_HPD_MASK = BIT(12),
+	HDMI_HDCP22_CONTROL_HPD_OFFSET = 12,
+	HDMI_HDCP22_CONTROL_PKT_ERR_OVR_VAL_MASK = BIT(9),
+	HDMI_HDCP22_CONTROL_PKT_ERR_OVR_VAL_OFFSET= 9,
+	HDMI_HDCP22_CONTROL_PKT_ERR_OVR_EN_MASK = BIT(8),
+	HDMI_HDCP22_CONTROL_PKT_ERR_OVR_EN_OFFSET = 8,
+	HDMI_HDCP22_CONTROL_AVMUTE_OVR_VAL_MASK = BIT(5),
+	HDMI_HDCP22_CONTROL_AVMUTE_OVR_VAL_OFFSET = 5,
+	HDMI_HDCP22_CONTROL_AVMUTE_OVR_EN_MASK = BIT(4),
+	HDMI_HDCP22_CONTROL_AVMUTE_OVR_EN_OFFSET = 4,
+	HDMI_HDCP22_CONTROL_OVR_VAL_MASK = BIT(2),
+	HDMI_HDCP22_CONTROL_OVR_VAL_OFFSET = 2,
+	HDMI_HDCP22_CONTROL_OVR_EN_MASK = BIT(1),
+	HDMI_HDCP22_CONTROL_OVR_EN_OFFSET = 1,
+	HDMI_HDCP22_CONTROL_SWITCH_LCK_MASK = BIT(0),
+	HDMI_HDCP22_CONTROL_SWITCH_LCK_OFFSET = 0,
+	/* AUD_CEC_ISTS field values */
+	HDMI_AUD_CEC_ISTS_WAKEUPCTRL = BIT(22),
+	HDMI_AUD_CEC_ISTS_ERROR_FOLL = BIT(21),
+	HDMI_AUD_CEC_ISTS_ERROR_INIT = BIT(20),
+	HDMI_AUD_CEC_ISTS_ARBLST = BIT(19),
+	HDMI_AUD_CEC_ISTS_NACK = BIT(18),
+	HDMI_AUD_CEC_ISTS_EOM = BIT(17),
+	HDMI_AUD_CEC_ISTS_DONE = BIT(16),
+	HDMI_AUD_CEC_ISTS_SCK_STABLE = BIT(1),
+	HDMI_AUD_CEC_ISTS_CTSN_CNT = BIT(0),
+	/* MD_ISTS field values */
+	HDMI_MD_ISTS_VOFS_LIN = BIT(11),
+	HDMI_MD_ISTS_VTOT_LIN = BIT(10),
+	HDMI_MD_ISTS_VACT_LIN = BIT(9),
+	HDMI_MD_ISTS_VS_CLK = BIT(8),
+	HDMI_MD_ISTS_VTOT_CLK = BIT(7),
+	HDMI_MD_ISTS_HACT_PIX = BIT(6),
+	HDMI_MD_ISTS_HS_CLK = BIT(5),
+	HDMI_MD_ISTS_HTOT32_CLK = BIT(4),
+	HDMI_MD_ISTS_ILACE = BIT(3),
+	HDMI_MD_ISTS_DE_ACTIVITY = BIT(2),
+	HDMI_MD_ISTS_VS_ACT = BIT(1),
+	HDMI_MD_ISTS_HS_ACT = BIT(0),
+	/* ISTS field values */
+	HDMI_ISTS_I2CMP_ARBLOST = BIT(30),
+	HDMI_ISTS_I2CMPNACK = BIT(29),
+	HDMI_ISTS_I2CMPDONE = BIT(28),
+	HDMI_ISTS_VS_THR_REACHED = BIT(27),
+	HDMI_ISTS_VSYNC_ACT_EDGE = BIT(26),
+	HDMI_ISTS_AKSV_RCV = BIT(25),
+	HDMI_ISTS_PLL_CLOCK_GATED = BIT(24),
+	HDMI_ISTS_DESER_MISAL = BIT(23),
+	HDMI_ISTS_CDSENSE_CHG = BIT(22),
+	HDMI_ISTS_CEAVID_EMPTY = BIT(21),
+	HDMI_ISTS_CEAVID_FULL = BIT(20),
+	HDMI_ISTS_SCDCTMDSCFGCHANGE = BIT(19),
+	HDMI_ISTS_SCDCSCSTATUSCHANGE = BIT(18),
+	HDMI_ISTS_SCDCCFGCHANGE = BIT(17),
+	HDMI_ISTS_DCM_CURRENT_MODE_CHG = BIT(16),
+	HDMI_ISTS_DCM_PH_DIFF_CNT_OVERFL = BIT(15),
+	HDMI_ISTS_DCM_GCP_ZERO_FIELDS_PASS = BIT(14),
+	HDMI_ISTS_CTL3_CHANGE = BIT(13),
+	HDMI_ISTS_CTL2_CHANGE = BIT(12),
+	HDMI_ISTS_CTL1_CHANGE = BIT(11),
+	HDMI_ISTS_CTL0_CHANGE = BIT(10),
+	HDMI_ISTS_VS_POL_ADJ = BIT(9),
+	HDMI_ISTS_HS_POL_ADJ = BIT(8),
+	HDMI_ISTS_RES_OVERLOAD = BIT(7),
+	HDMI_ISTS_CLK_CHANGE = BIT(6),
+	HDMI_ISTS_PLL_LCK_CHG = BIT(5),
+	HDMI_ISTS_EQGAIN_DONE = BIT(4),
+	HDMI_ISTS_OFFSCAL_DONE = BIT(3),
+	HDMI_ISTS_RESCAL_DONE = BIT(2),
+	HDMI_ISTS_ACT_CHANGE = BIT(1),
+	HDMI_ISTS_STATE_REACHED = BIT(0),
+	/* DMI_SW_RST field values */
+	HDMI_DMI_SW_RST_TMDS = BIT(16),
+	HDMI_DMI_SW_RST_HDCP = BIT(8),
+	HDMI_DMI_SW_RST_VID = BIT(7),
+	HDMI_DMI_SW_RST_PIXEL = BIT(6),
+	HDMI_DMI_SW_RST_CEC = BIT(5),
+	HDMI_DMI_SW_RST_AUD = BIT(4),
+	HDMI_DMI_SW_RST_BUS = BIT(3),
+	HDMI_DMI_SW_RST_HDMI = BIT(2),
+	HDMI_DMI_SW_RST_MODET = BIT(1),
+	HDMI_DMI_SW_RST_MAIN = BIT(0),
+	/* CEC_CTRL field values */
+	HDMI_CEC_CTRL_STANDBY_MASK = BIT(4),
+	HDMI_CEC_CTRL_STANDBY_OFFSET = 4,
+	HDMI_CEC_CTRL_BC_NACK_MASK = BIT(3),
+	HDMI_CEC_CTRL_BC_NACK_OFFSET = 3,
+	HDMI_CEC_CTRL_FRAME_TYP_MASK = GENMASK(2,1),
+	HDMI_CEC_CTRL_FRAME_TYP_OFFSET = 1,
+	HDMI_CEC_CTRL_SEND_MASK = BIT(0),
+	HDMI_CEC_CTRL_SEND_OFFSET = 0,
+	/* CEC_MASK field values */
+	HDMI_CEC_MASK_WAKEUP_MASK = BIT(6),
+	HDMI_CEC_MASK_WAKEUP_OFFSET = 6,
+	HDMI_CEC_MASK_ERROR_FLOW_MASK = BIT(5),
+	HDMI_CEC_MASK_ERROR_FLOW_OFFSET = 5,
+	HDMI_CEC_MASK_ERROR_INITITATOR_MASK = BIT(4),
+	HDMI_CEC_MASK_ERROR_INITITATOR_OFFSET = 4,
+	HDMI_CEC_MASK_ARB_LOST_MASK = BIT(3),
+	HDMI_CEC_MASK_ARB_LOST_OFFSET = 3,
+	HDMI_CEC_MASK_NACK_MASK = BIT(2),
+	HDMI_CEC_MASK_NACK_OFFSET = 2,
+	HDMI_CEC_MASK_EOM_MASK = BIT(1),
+	HDMI_CEC_MASK_EOM_OFFSET = 1,
+	HDMI_CEC_MASK_DONE_MASK = BIT(0),
+	HDMI_CEC_MASK_DONE_OFFSET = 0,
+	/* CBUSIOCTRL field values */
+	HDMI_CBUSIOCTRL_DATAPATH_CBUSZ_MASK = BIT(24),
+	HDMI_CBUSIOCTRL_DATAPATH_CBUSZ_OFFSET = 24,
+	HDMI_CBUSIOCTRL_SVSRETMODEZ_MASK = BIT(16),
+	HDMI_CBUSIOCTRL_SVSRETMODEZ_OFFSET = 16,
+	HDMI_CBUSIOCTRL_PDDQ_MASK = BIT(8),
+	HDMI_CBUSIOCTRL_PDDQ_OFFSET = 8,
+	HDMI_CBUSIOCTRL_RESET_MASK = BIT(0),
+	HDMI_CBUSIOCTRL_RESET_OFFSET = 0,
+};
+
+#endif /* __DW_HDMI_RX_H__ */
diff --git a/include/media/dwc/dw-hdmi-rx-pdata.h b/include/media/dwc/dw-hdmi-rx-pdata.h
new file mode 100644
index 0000000..25dc195
--- /dev/null
+++ b/include/media/dwc/dw-hdmi-rx-pdata.h
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// Copyright (c) 2017 Synopsys, Inc. and/or its affiliates.
+// Synopsys DesignWare HDMI Receiver controller platform data
+
+#ifndef __DW_HDMI_RX_PDATA_H__
+#define __DW_HDMI_RX_PDATA_H__
+
+#define DW_HDMI_RX_DRVNAME			"dw-hdmi-rx"
+
+/* Notify events */
+#define DW_HDMI_NOTIFY_IS_OFF		1
+#define DW_HDMI_NOTIFY_INPUT_CHANGED	2
+#define DW_HDMI_NOTIFY_AUDIO_CHANGED	3
+#define DW_HDMI_NOTIFY_IS_STABLE	4
+
+/**
+ * struct dw_hdmi_rx_pdata - Platform Data configuration for HDMI receiver.
+ *
+ * @dw_5v_status: 5v status callback. Shall return the status of the given
+ * input, i.e. shall be true if a cable is connected to the specified input.
+ *
+ * @dw_5v_clear: 5v clear callback. Shall clear the interrupt associated with
+ * the 5v sense controller.
+ *
+ * @dw_5v_arg: Argument to be used with the 5v sense callbacks.
+ *
+ * @dw_zcal_reset: Impedance calibration reset callback. Shall be called when
+ * the impedance calibration needs to be restarted. This is used by phy driver
+ * only.
+ *
+ * @dw_zcal_done: Impedance calibration status callback. Shall return true if
+ * the impedance calibration procedure has ended. This is used by phy driver
+ * only.
+ *
+ * @dw_zcal_arg: Argument to be used with the ZCAL calibration callbacks.
+ */
+struct dw_hdmi_rx_pdata {
+	/* 5V sense interface */
+	bool (*dw_5v_status)(void __iomem *regs, int input);
+	void (*dw_5v_clear)(void __iomem *regs);
+	void __iomem *dw_5v_arg;
+	/* Zcal interface */
+	void (*dw_zcal_reset)(void __iomem *regs);
+	bool (*dw_zcal_done)(void __iomem *regs);
+	void __iomem *dw_zcal_arg;
+};
+
+#endif /* __DW_HDMI_RX_PDATA_H__ */
-- 
1.9.1

Re: [PATCH v10 3/4] [media] platform: Add Synopsys DesignWare HDMI RX PHY e405 Driver

[Philippe Ombredanne]

On Mon, Dec 11, 2017 at 6:41 PM, Jose Abreu <Jose.Abreu@synopsys.com> wrote:
> This adds support for the Synopsys DesignWare HDMI RX PHY e405. This
> phy receives and decodes HDMI video that is delivered to a controller.
>
> Main features included in this driver are:
>         - Equalizer algorithm that chooses the phy best settings
>         according to the detected HDMI cable characteristics.
>         - Support for scrambling
>         - Support for HDMI 2.0 modes up to 6G (HDMI 4k@60Hz).
>
> The driver was implemented as a standalone V4L2 subdevice and the
> phy interface with the controller was implemented using V4L2 ioctls. I
> do not know if this is the best option but it is not possible to use the
> existing API functions directly as we need specific functions that will
> be called by the controller at specific configuration stages.
>
> There is also a bidirectional communication between controller and phy:
> The phy must provide functions that the controller will call (i.e.
> configuration functions) and the controller must provide read/write
> callbacks, as well as other specific functions.
>
> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
> Cc: Joao Pinto <jpinto@synopsys.com>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Hans Verkuil <hans.verkuil@cisco.com>
> Cc: Sylwester Nawrocki <snawrocki@kernel.org>
> Cc: Philippe Ombredanne <pombredanne@nexb.com>
> ---
> Changes from v9:
>         - Use SPDX License ID (Philippe)

Acked-by: Philippe Ombredanne <pombredanne@nexb.com>

Thanks!
-- 
Cordially
Philippe Ombredanne

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Philippe Ombredanne]

On Mon, Dec 11, 2017 at 6:41 PM, Jose Abreu <Jose.Abreu@synopsys.com> wrote:
> This is an initial submission for the Synopsys DesignWare HDMI RX
> Controller Driver. This driver interacts with a phy driver so that
> a communication between them is created and a video pipeline is
> configured.
>
> The controller + phy pipeline can then be integrated into a fully
> featured system that can be able to receive video up to 4k@60Hz
> with deep color 48bit RGB, depending on the platform. Although,
> this initial version does not yet handle deep color modes.
>
> This driver was implemented as a standard V4L2 subdevice and its
> main features are:
>         - Internal state machine that reconfigures phy until the
>         video is not stable
>         - JTAG communication with phy
>         - Inter-module communication with phy driver
>         - Debug write/read ioctls
>
> Some notes:
>         - RX sense controller (cable connection/disconnection) must
>         be handled by the platform wrapper as this is not integrated
>         into the controller RTL
>         - The same goes for EDID ROM's
>         - ZCAL calibration is needed only in FPGA platforms, in ASIC
>         this is not needed
>         - The state machine is not an ideal solution as it creates a
>         kthread but it is needed because some sources might not be
>         very stable at sending the video (i.e. we must react
>         accordingly).
>
> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
> Cc: Joao Pinto <jpinto@synopsys.com>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Hans Verkuil <hans.verkuil@cisco.com>
> Cc: Sylwester Nawrocki <snawrocki@kernel.org>
> Cc: Sakari Ailus <sakari.ailus@iki.fi>
> Cc: Philippe Ombredanne <pombredanne@nexb.com>
> ---
> Changes from v9:
>         - Use SPDX License ID (Philippe)

Acked-by: Philippe Ombredanne <pombredanne@nexb.com>

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Hans Verkuil]

Hi Jose,

Some more comments:

On 11/12/17 18:41, Jose Abreu wrote:
> This is an initial submission for the Synopsys DesignWare HDMI RX
> Controller Driver. This driver interacts with a phy driver so that
> a communication between them is created and a video pipeline is
> configured.
> 
> The controller + phy pipeline can then be integrated into a fully
> featured system that can be able to receive video up to 4k@60Hz
> with deep color 48bit RGB, depending on the platform. Although,
> this initial version does not yet handle deep color modes.
> 
> This driver was implemented as a standard V4L2 subdevice and its
> main features are:
> 	- Internal state machine that reconfigures phy until the
> 	video is not stable
> 	- JTAG communication with phy
> 	- Inter-module communication with phy driver
> 	- Debug write/read ioctls
> 
> Some notes:
> 	- RX sense controller (cable connection/disconnection) must
> 	be handled by the platform wrapper as this is not integrated
> 	into the controller RTL
> 	- The same goes for EDID ROM's
> 	- ZCAL calibration is needed only in FPGA platforms, in ASIC
> 	this is not needed
> 	- The state machine is not an ideal solution as it creates a
> 	kthread but it is needed because some sources might not be
> 	very stable at sending the video (i.e. we must react
> 	accordingly).
> 
> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
> Cc: Joao Pinto <jpinto@synopsys.com>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Hans Verkuil <hans.verkuil@cisco.com>
> Cc: Sylwester Nawrocki <snawrocki@kernel.org>
> Cc: Sakari Ailus <sakari.ailus@iki.fi>
> Cc: Philippe Ombredanne <pombredanne@nexb.com>
> ---
> Changes from v9:
> 	- Use SPDX License ID (Philippe)
> 	- Use LOW_DRIVE CEC error (Hans)
> 	- Fill bt->il_* fields (Hans)
> 	- Fix format->field to NONE (Hans)
> 	- Drop a left-over comment (Hans)
> 	- Use CEC_CAP_DEFAULTS (Hans)
> Changes from v8:
> 	- Incorporate Sakari's work on ASYNC subdevs
> Changes from v6:
> 	- edid-phandle now also looks for parent node (Sylwester)
> 	- Fix kbuild build warnings
> Changes from v5:
> 	- Removed HDCP 1.4 support (Hans)
> 	- Removed some CEC debug messages (Hans)
> 	- Add s_dv_timings callback (Hans)
> 	- Add V4L2_CID_DV_RX_POWER_PRESENT ctrl (Hans)
> Changes from v4:
> 	- Add flag V4L2_SUBDEV_FL_HAS_DEVNODE (Sylwester)
> 	- Remove some comments and change some messages to dev_dbg (Sylwester)
> 	- Use v4l2_async_subnotifier_register() (Sylwester)
> Changes from v3:
> 	- Use v4l2 async API (Sylwester)
> 	- Do not block waiting for phy
> 	- Do not use busy waiting delays (Sylwester)
> 	- Simplify dw_hdmi_power_on (Sylwester)
> 	- Use clock API (Sylwester)
> 	- Use compatible string (Sylwester)
> 	- Minor fixes (Sylwester)
> Changes from v2:
> 	- Address review comments from Hans regarding CEC
> 	- Use CEC notifier
> 	- Enable SCDC
> Changes from v1:
> 	- Add support for CEC
> 	- Correct typo errors
> 	- Correctly detect interlaced video modes
> 	- Correct VIC parsing
> Changes from RFC:
> 	- Add support for HDCP 1.4
> 	- Fixup HDMI_VIC not being parsed (Hans)
> 	- Send source change signal when powering off (Hans)
> 	- Add a "wait stable delay"
> 	- Detect interlaced video modes (Hans)
> 	- Restrain g/s_register from reading/writing to HDCP regs (Hans)
> ---
>  drivers/media/platform/dwc/Kconfig      |   15 +
>  drivers/media/platform/dwc/Makefile     |    1 +
>  drivers/media/platform/dwc/dw-hdmi-rx.c | 1840 +++++++++++++++++++++++++++++++
>  drivers/media/platform/dwc/dw-hdmi-rx.h |  419 +++++++
>  include/media/dwc/dw-hdmi-rx-pdata.h    |   48 +
>  5 files changed, 2323 insertions(+)
>  create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.c
>  create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.h
>  create mode 100644 include/media/dwc/dw-hdmi-rx-pdata.h
> 
> diff --git a/drivers/media/platform/dwc/Kconfig b/drivers/media/platform/dwc/Kconfig
> index 361d38d..3ddccde 100644
> --- a/drivers/media/platform/dwc/Kconfig
> +++ b/drivers/media/platform/dwc/Kconfig
> @@ -6,3 +6,18 @@ config VIDEO_DWC_HDMI_PHY_E405
>  
>  	  To compile this driver as a module, choose M here. The module
>  	  will be called dw-hdmi-phy-e405.
> +
> +config VIDEO_DWC_HDMI_RX
> +	tristate "Synopsys Designware HDMI Receiver driver"
> +	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
> +	help
> +	  Support for Synopsys Designware HDMI RX controller.
> +
> +	  To compile this driver as a module, choose M here. The module
> +	  will be called dw-hdmi-rx.
> +
> +config VIDEO_DWC_HDMI_RX_CEC
> +	bool
> +	depends on VIDEO_DWC_HDMI_RX
> +	select CEC_CORE
> +	select CEC_NOTIFIER
> diff --git a/drivers/media/platform/dwc/Makefile b/drivers/media/platform/dwc/Makefile
> index fc3b62c..cd04ca9 100644
> --- a/drivers/media/platform/dwc/Makefile
> +++ b/drivers/media/platform/dwc/Makefile
> @@ -1 +1,2 @@
>  obj-$(CONFIG_VIDEO_DWC_HDMI_PHY_E405) += dw-hdmi-phy-e405.o
> +obj-$(CONFIG_VIDEO_DWC_HDMI_RX) += dw-hdmi-rx.o
> diff --git a/drivers/media/platform/dwc/dw-hdmi-rx.c b/drivers/media/platform/dwc/dw-hdmi-rx.c
> new file mode 100644
> index 0000000..437351e
> --- /dev/null
> +++ b/drivers/media/platform/dwc/dw-hdmi-rx.c

<snip>

> +static int dw_hdmi_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
> +		u32 config)
> +{
> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
> +
> +	if (!has_signal(dw_dev, input))
> +		return -EINVAL;

Why would this be a reason to reject this? There may be no signal now, but a signal
might appear later.

> +
> +	dw_dev->selected_input = input;
> +	if (input == dw_dev->configured_input)
> +		return 0;
> +
> +	dw_hdmi_power_off(dw_dev);
> +	return dw_hdmi_power_on(dw_dev, input);
> +}
> +
> +static int dw_hdmi_g_input_status(struct v4l2_subdev *sd, u32 *status)
> +{
> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
> +
> +	*status = 0;
> +	if (!has_signal(dw_dev, dw_dev->selected_input))
> +		*status |= V4L2_IN_ST_NO_POWER;
> +	if (is_off(dw_dev))
> +		*status |= V4L2_IN_ST_NO_SIGNAL;
> +
> +	dev_dbg(dw_dev->dev, "%s: status=0x%x\n", __func__, *status);
> +	return 0;
> +}
> +
> +static int dw_hdmi_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parm)
> +{
> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
> +
> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
> +
> +	/* TODO: Use helper to compute timeperframe */
> +	parm->parm.capture.timeperframe.numerator = 1;
> +	parm->parm.capture.timeperframe.denominator = 60;
> +	return 0;
> +}
> +
> +static int dw_hdmi_s_dv_timings(struct v4l2_subdev *sd,
> +		struct v4l2_dv_timings *timings)
> +{
> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
> +
> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
> +	if (!v4l2_valid_dv_timings(timings, &dw_hdmi_timings_cap, NULL, NULL))
> +		return -EINVAL;
> +	if (v4l2_match_dv_timings(timings, &dw_dev->timings, 0, false))
> +		return 0;
> +
> +	dw_dev->timings = *timings;
> +	return 0;
> +}
> +
> +static int dw_hdmi_g_dv_timings(struct v4l2_subdev *sd,
> +		struct v4l2_dv_timings *timings)
> +{
> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
> +
> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
> +
> +	*timings = dw_dev->timings;
> +	return 0;
> +}
> +
> +static int dw_hdmi_query_dv_timings(struct v4l2_subdev *sd,
> +		struct v4l2_dv_timings *timings)
> +{
> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
> +	struct v4l2_bt_timings *bt = &timings->bt;
> +	bool is_hdmi_vic;
> +	u32 htot, hofs;
> +	u32 vtot;
> +	u8 vic;
> +
> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
> +
> +	memset(timings, 0, sizeof(*timings));
> +
> +	timings->type = V4L2_DV_BT_656_1120;
> +	bt->width = hdmi_readl(dw_dev, HDMI_MD_HACT_PX);
> +	bt->height = hdmi_readl(dw_dev, HDMI_MD_VAL);
> +	bt->interlaced = hdmi_readl(dw_dev, HDMI_MD_STS) & HDMI_MD_STS_ILACE ?
> +		V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
> +
> +	if (hdmi_readl(dw_dev, HDMI_ISTS) & HDMI_ISTS_VS_POL_ADJ)
> +		bt->polarities |= V4L2_DV_VSYNC_POS_POL;
> +	if (hdmi_readl(dw_dev, HDMI_ISTS) & HDMI_ISTS_HS_POL_ADJ)
> +		bt->polarities |= V4L2_DV_HSYNC_POS_POL;
> +
> +	bt->pixelclock = dw_hdmi_get_pixelclk(dw_dev);
> +
> +	/* HTOT = HACT + HFRONT + HSYNC + HBACK */
> +	htot = hdmi_mask_readl(dw_dev, HDMI_MD_HT1,
> +			HDMI_MD_HT1_HTOT_PIX_OFFSET,
> +			HDMI_MD_HT1_HTOT_PIX_MASK);
> +	/* HOFS = HSYNC + HBACK */
> +	hofs = hdmi_mask_readl(dw_dev, HDMI_MD_HT1,
> +			HDMI_MD_HT1_HOFS_PIX_OFFSET,
> +			HDMI_MD_HT1_HOFS_PIX_MASK);
> +
> +	bt->hfrontporch = htot - hofs - bt->width;
> +	bt->hsync = hdmi_mask_readl(dw_dev, HDMI_MD_HT0,
> +			HDMI_MD_HT0_HS_CLK_OFFSET,
> +			HDMI_MD_HT0_HS_CLK_MASK);
> +	bt->hbackporch = hofs - bt->hsync;
> +
> +	/* VTOT = VACT + VFRONT + VSYNC + VBACK */
> +	vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
> +
> +	hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
> +	msleep(50); /* Wait for 1 field */

How do you know this waits for 1 field? Or is this: "Wait for at least 1 field"?
I don't know exactly how the IP does this, but it looks fishy to me. If it is
correct, then it could use a few comments about what is going on here as it is
not obvious.

And what happens if the framerate is even slower? You know the pixelclock and
total width+height, so you can calculate the framerate from that.

> +	bt->vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
> +
> +	hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
> +	msleep(50); /* Wait for 1 field */
> +	bt->vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
> +	bt->vfrontporch = vtot - bt->height - bt->vsync - bt->vbackporch;
> +
> +	if (bt->interlaced == V4L2_DV_INTERLACED) {
> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
> +				HDMI_MD_VCTRL_V_MODE_MASK);
> +		msleep(100); /* Wait for 2 fields */
> +
> +		vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
> +		msleep(50); /* Wait for 1 field */
> +		bt->il_vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
> +
> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
> +		msleep(50);
> +		bt->il_vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
> +		bt->il_vfrontporch = vtot - bt->height - bt->il_vsync -
> +			bt->il_vbackporch;
> +
> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
> +				HDMI_MD_VCTRL_V_MODE_MASK);

Same here, I'm not sure this is correct. What is the output of
'v4l2-ctl --query-dv-timings' when you feed it a standard interlaced format?

> +	}
> +
> +	bt->standards = V4L2_DV_BT_STD_CEA861;
> +
> +	vic = dw_hdmi_get_curr_vic(dw_dev, &is_hdmi_vic);
> +	if (vic) {
> +		if (is_hdmi_vic) {
> +			bt->flags |= V4L2_DV_FL_HAS_HDMI_VIC;
> +			bt->hdmi_vic = vic;
> +			bt->cea861_vic = 0;
> +		} else {
> +			bt->flags |= V4L2_DV_FL_HAS_CEA861_VIC;
> +			bt->hdmi_vic = 0;
> +			bt->cea861_vic = vic;
> +		}
> +	}
> +
> +	return 0;
> +}

Regards,

	Hans

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Jose Abreu]

Hi Hans,

On 12-12-2017 15:47, Hans Verkuil wrote:
> Hi Jose,
>
> Some more comments:

Thanks for the review!

>
> On 11/12/17 18:41, Jose Abreu wrote:
>> This is an initial submission for the Synopsys DesignWare HDMI RX
>> Controller Driver. This driver interacts with a phy driver so that
>> a communication between them is created and a video pipeline is
>> configured.
>>
>> The controller + phy pipeline can then be integrated into a fully
>> featured system that can be able to receive video up to 4k@60Hz
>> with deep color 48bit RGB, depending on the platform. Although,
>> this initial version does not yet handle deep color modes.
>>
>> This driver was implemented as a standard V4L2 subdevice and its
>> main features are:
>> 	- Internal state machine that reconfigures phy until the
>> 	video is not stable
>> 	- JTAG communication with phy
>> 	- Inter-module communication with phy driver
>> 	- Debug write/read ioctls
>>
>> Some notes:
>> 	- RX sense controller (cable connection/disconnection) must
>> 	be handled by the platform wrapper as this is not integrated
>> 	into the controller RTL
>> 	- The same goes for EDID ROM's
>> 	- ZCAL calibration is needed only in FPGA platforms, in ASIC
>> 	this is not needed
>> 	- The state machine is not an ideal solution as it creates a
>> 	kthread but it is needed because some sources might not be
>> 	very stable at sending the video (i.e. we must react
>> 	accordingly).
>>
>> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
>> Cc: Joao Pinto <jpinto@synopsys.com>
>> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
>> Cc: Hans Verkuil <hans.verkuil@cisco.com>
>> Cc: Sylwester Nawrocki <snawrocki@kernel.org>
>> Cc: Sakari Ailus <sakari.ailus@iki.fi>
>> Cc: Philippe Ombredanne <pombredanne@nexb.com>
>> ---
>> Changes from v9:
>> 	- Use SPDX License ID (Philippe)
>> 	- Use LOW_DRIVE CEC error (Hans)
>> 	- Fill bt->il_* fields (Hans)
>> 	- Fix format->field to NONE (Hans)
>> 	- Drop a left-over comment (Hans)
>> 	- Use CEC_CAP_DEFAULTS (Hans)
>> Changes from v8:
>> 	- Incorporate Sakari's work on ASYNC subdevs
>> Changes from v6:
>> 	- edid-phandle now also looks for parent node (Sylwester)
>> 	- Fix kbuild build warnings
>> Changes from v5:
>> 	- Removed HDCP 1.4 support (Hans)
>> 	- Removed some CEC debug messages (Hans)
>> 	- Add s_dv_timings callback (Hans)
>> 	- Add V4L2_CID_DV_RX_POWER_PRESENT ctrl (Hans)
>> Changes from v4:
>> 	- Add flag V4L2_SUBDEV_FL_HAS_DEVNODE (Sylwester)
>> 	- Remove some comments and change some messages to dev_dbg (Sylwester)
>> 	- Use v4l2_async_subnotifier_register() (Sylwester)
>> Changes from v3:
>> 	- Use v4l2 async API (Sylwester)
>> 	- Do not block waiting for phy
>> 	- Do not use busy waiting delays (Sylwester)
>> 	- Simplify dw_hdmi_power_on (Sylwester)
>> 	- Use clock API (Sylwester)
>> 	- Use compatible string (Sylwester)
>> 	- Minor fixes (Sylwester)
>> Changes from v2:
>> 	- Address review comments from Hans regarding CEC
>> 	- Use CEC notifier
>> 	- Enable SCDC
>> Changes from v1:
>> 	- Add support for CEC
>> 	- Correct typo errors
>> 	- Correctly detect interlaced video modes
>> 	- Correct VIC parsing
>> Changes from RFC:
>> 	- Add support for HDCP 1.4
>> 	- Fixup HDMI_VIC not being parsed (Hans)
>> 	- Send source change signal when powering off (Hans)
>> 	- Add a "wait stable delay"
>> 	- Detect interlaced video modes (Hans)
>> 	- Restrain g/s_register from reading/writing to HDCP regs (Hans)
>> ---
>>  drivers/media/platform/dwc/Kconfig      |   15 +
>>  drivers/media/platform/dwc/Makefile     |    1 +
>>  drivers/media/platform/dwc/dw-hdmi-rx.c | 1840 +++++++++++++++++++++++++++++++
>>  drivers/media/platform/dwc/dw-hdmi-rx.h |  419 +++++++
>>  include/media/dwc/dw-hdmi-rx-pdata.h    |   48 +
>>  5 files changed, 2323 insertions(+)
>>  create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.c
>>  create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.h
>>  create mode 100644 include/media/dwc/dw-hdmi-rx-pdata.h
>>
>> diff --git a/drivers/media/platform/dwc/Kconfig b/drivers/media/platform/dwc/Kconfig
>> index 361d38d..3ddccde 100644
>> --- a/drivers/media/platform/dwc/Kconfig
>> +++ b/drivers/media/platform/dwc/Kconfig
>> @@ -6,3 +6,18 @@ config VIDEO_DWC_HDMI_PHY_E405
>>  
>>  	  To compile this driver as a module, choose M here. The module
>>  	  will be called dw-hdmi-phy-e405.
>> +
>> +config VIDEO_DWC_HDMI_RX
>> +	tristate "Synopsys Designware HDMI Receiver driver"
>> +	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
>> +	help
>> +	  Support for Synopsys Designware HDMI RX controller.
>> +
>> +	  To compile this driver as a module, choose M here. The module
>> +	  will be called dw-hdmi-rx.
>> +
>> +config VIDEO_DWC_HDMI_RX_CEC
>> +	bool
>> +	depends on VIDEO_DWC_HDMI_RX
>> +	select CEC_CORE
>> +	select CEC_NOTIFIER
>> diff --git a/drivers/media/platform/dwc/Makefile b/drivers/media/platform/dwc/Makefile
>> index fc3b62c..cd04ca9 100644
>> --- a/drivers/media/platform/dwc/Makefile
>> +++ b/drivers/media/platform/dwc/Makefile
>> @@ -1 +1,2 @@
>>  obj-$(CONFIG_VIDEO_DWC_HDMI_PHY_E405) += dw-hdmi-phy-e405.o
>> +obj-$(CONFIG_VIDEO_DWC_HDMI_RX) += dw-hdmi-rx.o
>> diff --git a/drivers/media/platform/dwc/dw-hdmi-rx.c b/drivers/media/platform/dwc/dw-hdmi-rx.c
>> new file mode 100644
>> index 0000000..437351e
>> --- /dev/null
>> +++ b/drivers/media/platform/dwc/dw-hdmi-rx.c
> <snip>
>
>> +static int dw_hdmi_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
>> +		u32 config)
>> +{
>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>> +
>> +	if (!has_signal(dw_dev, input))
>> +		return -EINVAL;
> Why would this be a reason to reject this? There may be no signal now, but a signal
> might appear later.

I would expect s_routing to only be called if there is an input
connected, otherwise we are just wasting resources by trying to
equalize an input that is not present ... I can remove the "if"
as there are other safe guards for this though (for example g_fmt
will return an error) ...

>
>> +
>> +	dw_dev->selected_input = input;
>> +	if (input == dw_dev->configured_input)
>> +		return 0;
>> +
>> +	dw_hdmi_power_off(dw_dev);
>> +	return dw_hdmi_power_on(dw_dev, input);
>> +}
>> +
>> +static int dw_hdmi_g_input_status(struct v4l2_subdev *sd, u32 *status)
>> +{
>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>> +
>> +	*status = 0;
>> +	if (!has_signal(dw_dev, dw_dev->selected_input))
>> +		*status |= V4L2_IN_ST_NO_POWER;
>> +	if (is_off(dw_dev))
>> +		*status |= V4L2_IN_ST_NO_SIGNAL;
>> +
>> +	dev_dbg(dw_dev->dev, "%s: status=0x%x\n", __func__, *status);
>> +	return 0;
>> +}
>> +
>> +static int dw_hdmi_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parm)
>> +{
>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>> +
>> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
>> +
>> +	/* TODO: Use helper to compute timeperframe */
>> +	parm->parm.capture.timeperframe.numerator = 1;
>> +	parm->parm.capture.timeperframe.denominator = 60;
>> +	return 0;
>> +}
>> +
>> +static int dw_hdmi_s_dv_timings(struct v4l2_subdev *sd,
>> +		struct v4l2_dv_timings *timings)
>> +{
>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>> +
>> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
>> +	if (!v4l2_valid_dv_timings(timings, &dw_hdmi_timings_cap, NULL, NULL))
>> +		return -EINVAL;
>> +	if (v4l2_match_dv_timings(timings, &dw_dev->timings, 0, false))
>> +		return 0;
>> +
>> +	dw_dev->timings = *timings;
>> +	return 0;
>> +}
>> +
>> +static int dw_hdmi_g_dv_timings(struct v4l2_subdev *sd,
>> +		struct v4l2_dv_timings *timings)
>> +{
>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>> +
>> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
>> +
>> +	*timings = dw_dev->timings;
>> +	return 0;
>> +}
>> +
>> +static int dw_hdmi_query_dv_timings(struct v4l2_subdev *sd,
>> +		struct v4l2_dv_timings *timings)
>> +{
>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>> +	struct v4l2_bt_timings *bt = &timings->bt;
>> +	bool is_hdmi_vic;
>> +	u32 htot, hofs;
>> +	u32 vtot;
>> +	u8 vic;
>> +
>> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
>> +
>> +	memset(timings, 0, sizeof(*timings));
>> +
>> +	timings->type = V4L2_DV_BT_656_1120;
>> +	bt->width = hdmi_readl(dw_dev, HDMI_MD_HACT_PX);
>> +	bt->height = hdmi_readl(dw_dev, HDMI_MD_VAL);
>> +	bt->interlaced = hdmi_readl(dw_dev, HDMI_MD_STS) & HDMI_MD_STS_ILACE ?
>> +		V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
>> +
>> +	if (hdmi_readl(dw_dev, HDMI_ISTS) & HDMI_ISTS_VS_POL_ADJ)
>> +		bt->polarities |= V4L2_DV_VSYNC_POS_POL;
>> +	if (hdmi_readl(dw_dev, HDMI_ISTS) & HDMI_ISTS_HS_POL_ADJ)
>> +		bt->polarities |= V4L2_DV_HSYNC_POS_POL;
>> +
>> +	bt->pixelclock = dw_hdmi_get_pixelclk(dw_dev);
>> +
>> +	/* HTOT = HACT + HFRONT + HSYNC + HBACK */
>> +	htot = hdmi_mask_readl(dw_dev, HDMI_MD_HT1,
>> +			HDMI_MD_HT1_HTOT_PIX_OFFSET,
>> +			HDMI_MD_HT1_HTOT_PIX_MASK);
>> +	/* HOFS = HSYNC + HBACK */
>> +	hofs = hdmi_mask_readl(dw_dev, HDMI_MD_HT1,
>> +			HDMI_MD_HT1_HOFS_PIX_OFFSET,
>> +			HDMI_MD_HT1_HOFS_PIX_MASK);
>> +
>> +	bt->hfrontporch = htot - hofs - bt->width;
>> +	bt->hsync = hdmi_mask_readl(dw_dev, HDMI_MD_HT0,
>> +			HDMI_MD_HT0_HS_CLK_OFFSET,
>> +			HDMI_MD_HT0_HS_CLK_MASK);
>> +	bt->hbackporch = hofs - bt->hsync;
>> +
>> +	/* VTOT = VACT + VFRONT + VSYNC + VBACK */
>> +	vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
>> +
>> +	hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>> +	msleep(50); /* Wait for 1 field */
> How do you know this waits for 1 field? Or is this: "Wait for at least 1 field"?

Its wait at least for 1 field. This is over-generous because its
assuming the frame rate is 20fps (which in HDMI does not happen).

> I don't know exactly how the IP does this, but it looks fishy to me. If it is
> correct, then it could use a few comments about what is going on here as it is
> not obvious.

The IP updates the values at each field but I need to change this
register to populate all values in the bt struct.

>
> And what happens if the framerate is even slower? You know the pixelclock and
> total width+height, so you can calculate the framerate from that.

Hmm, but then I have to consider pixelclk error, msleep error, ...

>
>> +	bt->vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
>> +
>> +	hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>> +	msleep(50); /* Wait for 1 field */
>> +	bt->vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
>> +	bt->vfrontporch = vtot - bt->height - bt->vsync - bt->vbackporch;
>> +
>> +	if (bt->interlaced == V4L2_DV_INTERLACED) {
>> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
>> +				HDMI_MD_VCTRL_V_MODE_MASK);
>> +		msleep(100); /* Wait for 2 fields */
>> +
>> +		vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
>> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>> +		msleep(50); /* Wait for 1 field */
>> +		bt->il_vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
>> +
>> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>> +		msleep(50);
>> +		bt->il_vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
>> +		bt->il_vfrontporch = vtot - bt->height - bt->il_vsync -
>> +			bt->il_vbackporch;
>> +
>> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
>> +				HDMI_MD_VCTRL_V_MODE_MASK);
> Same here, I'm not sure this is correct. What is the output of
> 'v4l2-ctl --query-dv-timings' when you feed it a standard interlaced format?

I used v4l2-ctl --log-status with interlaced format and
everything seemed correct ...

Thanks and Best Regards,
Jose Miguel Abreu

>
>> +	}
>> +
>> +	bt->standards = V4L2_DV_BT_STD_CEA861;
>> +
>> +	vic = dw_hdmi_get_curr_vic(dw_dev, &is_hdmi_vic);
>> +	if (vic) {
>> +		if (is_hdmi_vic) {
>> +			bt->flags |= V4L2_DV_FL_HAS_HDMI_VIC;
>> +			bt->hdmi_vic = vic;
>> +			bt->cea861_vic = 0;
>> +		} else {
>> +			bt->flags |= V4L2_DV_FL_HAS_CEA861_VIC;
>> +			bt->hdmi_vic = 0;
>> +			bt->cea861_vic = vic;
>> +		}
>> +	}
>> +
>> +	return 0;
>> +}
> Regards,
>
> 	Hans
>

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Hans Verkuil]

On 12/12/17 17:02, Jose Abreu wrote:
> Hi Hans,
> 
> On 12-12-2017 15:47, Hans Verkuil wrote:
>> Hi Jose,
>>
>> Some more comments:
> 
> Thanks for the review!
> 
>>
>> On 11/12/17 18:41, Jose Abreu wrote:
>>> This is an initial submission for the Synopsys DesignWare HDMI RX
>>> Controller Driver. This driver interacts with a phy driver so that
>>> a communication between them is created and a video pipeline is
>>> configured.
>>>
>>> The controller + phy pipeline can then be integrated into a fully
>>> featured system that can be able to receive video up to 4k@60Hz
>>> with deep color 48bit RGB, depending on the platform. Although,
>>> this initial version does not yet handle deep color modes.
>>>
>>> This driver was implemented as a standard V4L2 subdevice and its
>>> main features are:
>>> 	- Internal state machine that reconfigures phy until the
>>> 	video is not stable
>>> 	- JTAG communication with phy
>>> 	- Inter-module communication with phy driver
>>> 	- Debug write/read ioctls
>>>
>>> Some notes:
>>> 	- RX sense controller (cable connection/disconnection) must
>>> 	be handled by the platform wrapper as this is not integrated
>>> 	into the controller RTL
>>> 	- The same goes for EDID ROM's
>>> 	- ZCAL calibration is needed only in FPGA platforms, in ASIC
>>> 	this is not needed
>>> 	- The state machine is not an ideal solution as it creates a
>>> 	kthread but it is needed because some sources might not be
>>> 	very stable at sending the video (i.e. we must react
>>> 	accordingly).
>>>
>>> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
>>> Cc: Joao Pinto <jpinto@synopsys.com>
>>> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
>>> Cc: Hans Verkuil <hans.verkuil@cisco.com>
>>> Cc: Sylwester Nawrocki <snawrocki@kernel.org>
>>> Cc: Sakari Ailus <sakari.ailus@iki.fi>
>>> Cc: Philippe Ombredanne <pombredanne@nexb.com>
>>> ---
>>> Changes from v9:
>>> 	- Use SPDX License ID (Philippe)
>>> 	- Use LOW_DRIVE CEC error (Hans)
>>> 	- Fill bt->il_* fields (Hans)
>>> 	- Fix format->field to NONE (Hans)
>>> 	- Drop a left-over comment (Hans)
>>> 	- Use CEC_CAP_DEFAULTS (Hans)
>>> Changes from v8:
>>> 	- Incorporate Sakari's work on ASYNC subdevs
>>> Changes from v6:
>>> 	- edid-phandle now also looks for parent node (Sylwester)
>>> 	- Fix kbuild build warnings
>>> Changes from v5:
>>> 	- Removed HDCP 1.4 support (Hans)
>>> 	- Removed some CEC debug messages (Hans)
>>> 	- Add s_dv_timings callback (Hans)
>>> 	- Add V4L2_CID_DV_RX_POWER_PRESENT ctrl (Hans)
>>> Changes from v4:
>>> 	- Add flag V4L2_SUBDEV_FL_HAS_DEVNODE (Sylwester)
>>> 	- Remove some comments and change some messages to dev_dbg (Sylwester)
>>> 	- Use v4l2_async_subnotifier_register() (Sylwester)
>>> Changes from v3:
>>> 	- Use v4l2 async API (Sylwester)
>>> 	- Do not block waiting for phy
>>> 	- Do not use busy waiting delays (Sylwester)
>>> 	- Simplify dw_hdmi_power_on (Sylwester)
>>> 	- Use clock API (Sylwester)
>>> 	- Use compatible string (Sylwester)
>>> 	- Minor fixes (Sylwester)
>>> Changes from v2:
>>> 	- Address review comments from Hans regarding CEC
>>> 	- Use CEC notifier
>>> 	- Enable SCDC
>>> Changes from v1:
>>> 	- Add support for CEC
>>> 	- Correct typo errors
>>> 	- Correctly detect interlaced video modes
>>> 	- Correct VIC parsing
>>> Changes from RFC:
>>> 	- Add support for HDCP 1.4
>>> 	- Fixup HDMI_VIC not being parsed (Hans)
>>> 	- Send source change signal when powering off (Hans)
>>> 	- Add a "wait stable delay"
>>> 	- Detect interlaced video modes (Hans)
>>> 	- Restrain g/s_register from reading/writing to HDCP regs (Hans)
>>> ---
>>>  drivers/media/platform/dwc/Kconfig      |   15 +
>>>  drivers/media/platform/dwc/Makefile     |    1 +
>>>  drivers/media/platform/dwc/dw-hdmi-rx.c | 1840 +++++++++++++++++++++++++++++++
>>>  drivers/media/platform/dwc/dw-hdmi-rx.h |  419 +++++++
>>>  include/media/dwc/dw-hdmi-rx-pdata.h    |   48 +
>>>  5 files changed, 2323 insertions(+)
>>>  create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.c
>>>  create mode 100644 drivers/media/platform/dwc/dw-hdmi-rx.h
>>>  create mode 100644 include/media/dwc/dw-hdmi-rx-pdata.h
>>>
>>> diff --git a/drivers/media/platform/dwc/Kconfig b/drivers/media/platform/dwc/Kconfig
>>> index 361d38d..3ddccde 100644
>>> --- a/drivers/media/platform/dwc/Kconfig
>>> +++ b/drivers/media/platform/dwc/Kconfig
>>> @@ -6,3 +6,18 @@ config VIDEO_DWC_HDMI_PHY_E405
>>>  
>>>  	  To compile this driver as a module, choose M here. The module
>>>  	  will be called dw-hdmi-phy-e405.
>>> +
>>> +config VIDEO_DWC_HDMI_RX
>>> +	tristate "Synopsys Designware HDMI Receiver driver"
>>> +	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
>>> +	help
>>> +	  Support for Synopsys Designware HDMI RX controller.
>>> +
>>> +	  To compile this driver as a module, choose M here. The module
>>> +	  will be called dw-hdmi-rx.
>>> +
>>> +config VIDEO_DWC_HDMI_RX_CEC
>>> +	bool
>>> +	depends on VIDEO_DWC_HDMI_RX
>>> +	select CEC_CORE
>>> +	select CEC_NOTIFIER
>>> diff --git a/drivers/media/platform/dwc/Makefile b/drivers/media/platform/dwc/Makefile
>>> index fc3b62c..cd04ca9 100644
>>> --- a/drivers/media/platform/dwc/Makefile
>>> +++ b/drivers/media/platform/dwc/Makefile
>>> @@ -1 +1,2 @@
>>>  obj-$(CONFIG_VIDEO_DWC_HDMI_PHY_E405) += dw-hdmi-phy-e405.o
>>> +obj-$(CONFIG_VIDEO_DWC_HDMI_RX) += dw-hdmi-rx.o
>>> diff --git a/drivers/media/platform/dwc/dw-hdmi-rx.c b/drivers/media/platform/dwc/dw-hdmi-rx.c
>>> new file mode 100644
>>> index 0000000..437351e
>>> --- /dev/null
>>> +++ b/drivers/media/platform/dwc/dw-hdmi-rx.c
>> <snip>
>>
>>> +static int dw_hdmi_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
>>> +		u32 config)
>>> +{
>>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>>> +
>>> +	if (!has_signal(dw_dev, input))
>>> +		return -EINVAL;
>> Why would this be a reason to reject this? There may be no signal now, but a signal
>> might appear later.
> 
> I would expect s_routing to only be called if there is an input
> connected, otherwise we are just wasting resources by trying to
> equalize an input that is not present ... I can remove the "if"
> as there are other safe guards for this though (for example g_fmt
> will return an error) ...

No, s_routing is typically called as a result of a VIDIOC_S_INPUT
call, and that can come whether or not there is a signal on an
input. In fact, initially the first input is always selected anyway,
whether or not there is a signal.

g_fmt will just return the current configured format, this is unrelated
to whether or not there is a signal.

The only times the driver checks whether or not there is a signal (and
what that is) are:

1) g_input_status
2) query_dv_timings
3) when the irq detects a signal change and sends V4L2_EVENT_SOURCE_CHANGE

> 
>>
>>> +
>>> +	dw_dev->selected_input = input;
>>> +	if (input == dw_dev->configured_input)
>>> +		return 0;
>>> +
>>> +	dw_hdmi_power_off(dw_dev);
>>> +	return dw_hdmi_power_on(dw_dev, input);
>>> +}
>>> +
>>> +static int dw_hdmi_g_input_status(struct v4l2_subdev *sd, u32 *status)
>>> +{
>>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>>> +
>>> +	*status = 0;
>>> +	if (!has_signal(dw_dev, dw_dev->selected_input))
>>> +		*status |= V4L2_IN_ST_NO_POWER;
>>> +	if (is_off(dw_dev))
>>> +		*status |= V4L2_IN_ST_NO_SIGNAL;
>>> +
>>> +	dev_dbg(dw_dev->dev, "%s: status=0x%x\n", __func__, *status);
>>> +	return 0;
>>> +}
>>> +
>>> +static int dw_hdmi_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parm)
>>> +{
>>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>>> +
>>> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
>>> +
>>> +	/* TODO: Use helper to compute timeperframe */
>>> +	parm->parm.capture.timeperframe.numerator = 1;
>>> +	parm->parm.capture.timeperframe.denominator = 60;
>>> +	return 0;
>>> +}
>>> +
>>> +static int dw_hdmi_s_dv_timings(struct v4l2_subdev *sd,
>>> +		struct v4l2_dv_timings *timings)
>>> +{
>>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>>> +
>>> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
>>> +	if (!v4l2_valid_dv_timings(timings, &dw_hdmi_timings_cap, NULL, NULL))
>>> +		return -EINVAL;
>>> +	if (v4l2_match_dv_timings(timings, &dw_dev->timings, 0, false))
>>> +		return 0;
>>> +
>>> +	dw_dev->timings = *timings;
>>> +	return 0;
>>> +}
>>> +
>>> +static int dw_hdmi_g_dv_timings(struct v4l2_subdev *sd,
>>> +		struct v4l2_dv_timings *timings)
>>> +{
>>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>>> +
>>> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
>>> +
>>> +	*timings = dw_dev->timings;
>>> +	return 0;
>>> +}
>>> +
>>> +static int dw_hdmi_query_dv_timings(struct v4l2_subdev *sd,
>>> +		struct v4l2_dv_timings *timings)
>>> +{
>>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>>> +	struct v4l2_bt_timings *bt = &timings->bt;
>>> +	bool is_hdmi_vic;
>>> +	u32 htot, hofs;
>>> +	u32 vtot;
>>> +	u8 vic;
>>> +
>>> +	dev_dbg(dw_dev->dev, "%s\n", __func__);
>>> +
>>> +	memset(timings, 0, sizeof(*timings));
>>> +
>>> +	timings->type = V4L2_DV_BT_656_1120;
>>> +	bt->width = hdmi_readl(dw_dev, HDMI_MD_HACT_PX);
>>> +	bt->height = hdmi_readl(dw_dev, HDMI_MD_VAL);
>>> +	bt->interlaced = hdmi_readl(dw_dev, HDMI_MD_STS) & HDMI_MD_STS_ILACE ?
>>> +		V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
>>> +
>>> +	if (hdmi_readl(dw_dev, HDMI_ISTS) & HDMI_ISTS_VS_POL_ADJ)
>>> +		bt->polarities |= V4L2_DV_VSYNC_POS_POL;
>>> +	if (hdmi_readl(dw_dev, HDMI_ISTS) & HDMI_ISTS_HS_POL_ADJ)
>>> +		bt->polarities |= V4L2_DV_HSYNC_POS_POL;
>>> +
>>> +	bt->pixelclock = dw_hdmi_get_pixelclk(dw_dev);
>>> +
>>> +	/* HTOT = HACT + HFRONT + HSYNC + HBACK */
>>> +	htot = hdmi_mask_readl(dw_dev, HDMI_MD_HT1,
>>> +			HDMI_MD_HT1_HTOT_PIX_OFFSET,
>>> +			HDMI_MD_HT1_HTOT_PIX_MASK);
>>> +	/* HOFS = HSYNC + HBACK */
>>> +	hofs = hdmi_mask_readl(dw_dev, HDMI_MD_HT1,
>>> +			HDMI_MD_HT1_HOFS_PIX_OFFSET,
>>> +			HDMI_MD_HT1_HOFS_PIX_MASK);
>>> +
>>> +	bt->hfrontporch = htot - hofs - bt->width;
>>> +	bt->hsync = hdmi_mask_readl(dw_dev, HDMI_MD_HT0,
>>> +			HDMI_MD_HT0_HS_CLK_OFFSET,
>>> +			HDMI_MD_HT0_HS_CLK_MASK);
>>> +	bt->hbackporch = hofs - bt->hsync;
>>> +
>>> +	/* VTOT = VACT + VFRONT + VSYNC + VBACK */
>>> +	vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
>>> +
>>> +	hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>> +	msleep(50); /* Wait for 1 field */
>> How do you know this waits for 1 field? Or is this: "Wait for at least 1 field"?
> 
> Its wait at least for 1 field. This is over-generous because its
> assuming the frame rate is 20fps (which in HDMI does not happen).

With custom timings it can happen (i.e. a 15 fps stream). Admittedly, it's not
common, but people sometimes use it.

> 
>> I don't know exactly how the IP does this, but it looks fishy to me. If it is
>> correct, then it could use a few comments about what is going on here as it is
>> not obvious.
> 
> The IP updates the values at each field but I need to change this
> register to populate all values in the bt struct.

How do you know which field (top or bottom) you've captured? How do you know you
didn't miss e.g. the bottom field and instead end up with two top field measurements?

The top and bottom field are almost, but not quite the same. Typically the vertical
backporch of the fields differs by 1 where the second field's backporch is larger by 1 line.

> 
>>
>> And what happens if the framerate is even slower? You know the pixelclock and
>> total width+height, so you can calculate the framerate from that.
> 
> Hmm, but then I have to consider pixelclk error, msleep error, ...

But you have that now as well.

An alternative is to measure a single field and deduce the backporch values from that.

At least for all the common HDMI interlaced formats il_vbackporch is an even value and
vbackporch is il_vbackporch - 1.

So if you get an even backporch, then you found il_vbackporch, and if it is odd, then
you found vbackporch.

> 
>>
>>> +	bt->vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>> +
>>> +	hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>> +	msleep(50); /* Wait for 1 field */
>>> +	bt->vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>> +	bt->vfrontporch = vtot - bt->height - bt->vsync - bt->vbackporch;
>>> +
>>> +	if (bt->interlaced == V4L2_DV_INTERLACED) {
>>> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>>> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
>>> +				HDMI_MD_VCTRL_V_MODE_MASK);
>>> +		msleep(100); /* Wait for 2 fields */
>>> +
>>> +		vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
>>> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>> +		msleep(50); /* Wait for 1 field */
>>> +		bt->il_vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>> +
>>> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>> +		msleep(50);
>>> +		bt->il_vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>> +		bt->il_vfrontporch = vtot - bt->height - bt->il_vsync -
>>> +			bt->il_vbackporch;
>>> +
>>> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>>> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
>>> +				HDMI_MD_VCTRL_V_MODE_MASK);
>> Same here, I'm not sure this is correct. What is the output of
>> 'v4l2-ctl --query-dv-timings' when you feed it a standard interlaced format?
> 
> I used v4l2-ctl --log-status with interlaced format and
> everything seemed correct ...

Can you show a few examples? Is vbackport odd? And is il_vbackporch equal to vbackporch + 1?

Interlaced is tricky :-)

Regards,

	Hans

> 
> Thanks and Best Regards,
> Jose Miguel Abreu
> 
>>
>>> +	}
>>> +
>>> +	bt->standards = V4L2_DV_BT_STD_CEA861;
>>> +
>>> +	vic = dw_hdmi_get_curr_vic(dw_dev, &is_hdmi_vic);
>>> +	if (vic) {
>>> +		if (is_hdmi_vic) {
>>> +			bt->flags |= V4L2_DV_FL_HAS_HDMI_VIC;
>>> +			bt->hdmi_vic = vic;
>>> +			bt->cea861_vic = 0;
>>> +		} else {
>>> +			bt->flags |= V4L2_DV_FL_HAS_CEA861_VIC;
>>> +			bt->hdmi_vic = 0;
>>> +			bt->cea861_vic = vic;
>>> +		}
>>> +	}
>>> +
>>> +	return 0;
>>> +}
>> Regards,
>>
>> 	Hans
>>
> 

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Philippe Ombredanne]

Jose,

On 12/12/17 17:02, Jose Abreu wrote:
<snip>

>>> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
>>> Cc: Joao Pinto <jpinto@synopsys.com>
>>> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
>>> Cc: Hans Verkuil <hans.verkuil@cisco.com>
>>> Cc: Sylwester Nawrocki <snawrocki@kernel.org>
>>> Cc: Sakari Ailus <sakari.ailus@iki.fi>
>>> Cc: Philippe Ombredanne <pombredanne@nexb.com>
>>> ---
>>> Changes from v9:
>>>     - Use SPDX License ID (Philippe)

For the use of SPDX tags, thanks!

Acked-by: Philippe Ombredanne <pombredanne@nexB.com>

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Jose Abreu]

Hi Hans,

On 13-12-2017 10:00, Hans Verkuil wrote:
> On 12/12/17 17:02, Jose Abreu wrote:
>>
>>>> +static int dw_hdmi_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
>>>> +		u32 config)
>>>> +{
>>>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>>>> +
>>>> +	if (!has_signal(dw_dev, input))
>>>> +		return -EINVAL;
>>> Why would this be a reason to reject this? There may be no signal now, but a signal
>>> might appear later.
>> I would expect s_routing to only be called if there is an input
>> connected, otherwise we are just wasting resources by trying to
>> equalize an input that is not present ... I can remove the "if"
>> as there are other safe guards for this though (for example g_fmt
>> will return an error) ...
> No, s_routing is typically called as a result of a VIDIOC_S_INPUT
> call, and that can come whether or not there is a signal on an
> input. In fact, initially the first input is always selected anyway,
> whether or not there is a signal.
>
> g_fmt will just return the current configured format, this is unrelated
> to whether or not there is a signal.
>
> The only times the driver checks whether or not there is a signal (and
> what that is) are:
>
> 1) g_input_status
> 2) query_dv_timings
> 3) when the irq detects a signal change and sends V4L2_EVENT_SOURCE_CHANGE

Ok, I will remove the checks then.

>
>>>> +	msleep(50); /* Wait for 1 field */
>>> How do you know this waits for 1 field? Or is this: "Wait for at least 1 field"?
>> Its wait at least for 1 field. This is over-generous because its
>> assuming the frame rate is 20fps (which in HDMI does not happen).
> With custom timings it can happen (i.e. a 15 fps stream). Admittedly, it's not
> common, but people sometimes use it.
>
>>> I don't know exactly how the IP does this, but it looks fishy to me. If it is
>>> correct, then it could use a few comments about what is going on here as it is
>>> not obvious.
>> The IP updates the values at each field but I need to change this
>> register to populate all values in the bt struct.
> How do you know which field (top or bottom) you've captured? How do you know you
> didn't miss e.g. the bottom field and instead end up with two top field measurements?
>
> The top and bottom field are almost, but not quite the same. Typically the vertical
> backporch of the fields differs by 1 where the second field's backporch is larger by 1 line.
>
>>> And what happens if the framerate is even slower? You know the pixelclock and
>>> total width+height, so you can calculate the framerate from that.
>> Hmm, but then I have to consider pixelclk error, msleep error, ...
> But you have that now as well.
>
> An alternative is to measure a single field and deduce the backporch values from that.
>
> At least for all the common HDMI interlaced formats il_vbackporch is an even value and
> vbackporch is il_vbackporch - 1.
>
> So if you get an even backporch, then you found il_vbackporch, and if it is odd, then
> you found vbackporch.
>
>>>> +	bt->vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>>> +
>>>> +	hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>>>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>>> +	msleep(50); /* Wait for 1 field */
>>>> +	bt->vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>>> +	bt->vfrontporch = vtot - bt->height - bt->vsync - bt->vbackporch;
>>>> +
>>>> +	if (bt->interlaced == V4L2_DV_INTERLACED) {
>>>> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>>>> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
>>>> +				HDMI_MD_VCTRL_V_MODE_MASK);
>>>> +		msleep(100); /* Wait for 2 fields */
>>>> +
>>>> +		vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
>>>> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>>> +		msleep(50); /* Wait for 1 field */
>>>> +		bt->il_vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>>> +
>>>> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>>> +		msleep(50);
>>>> +		bt->il_vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>>> +		bt->il_vfrontporch = vtot - bt->height - bt->il_vsync -
>>>> +			bt->il_vbackporch;
>>>> +
>>>> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>>>> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
>>>> +				HDMI_MD_VCTRL_V_MODE_MASK);
>>> Same here, I'm not sure this is correct. What is the output of
>>> 'v4l2-ctl --query-dv-timings' when you feed it a standard interlaced format?
>> I used v4l2-ctl --log-status with interlaced format and
>> everything seemed correct ...
> Can you show a few examples? Is vbackport odd? And is il_vbackporch equal to vbackporch + 1?
>
> Interlaced is tricky :-)

Indeed. I compared the values with the spec and they are not
correct. Even hsync is wrong. I already corrected in the code the
hsync but regarding interlace I'm not seeing an easy way to do
this without using interrupts in each vsync because the register
I was toggling does not behave as I expected (I misunderstood the
databook). Maybe we should not detect interlaced modes for now?
Or not fill the il_ fields?

Best Regards,
Jose Miguel Abreu

>
> Regards,
>
> 	Hans
>

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Hans Verkuil]

On 13/12/17 15:00, Jose Abreu wrote:
> Hi Hans,
> 
> On 13-12-2017 10:00, Hans Verkuil wrote:
>> On 12/12/17 17:02, Jose Abreu wrote:
>>>
>>>>> +static int dw_hdmi_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
>>>>> +		u32 config)
>>>>> +{
>>>>> +	struct dw_hdmi_dev *dw_dev = to_dw_dev(sd);
>>>>> +
>>>>> +	if (!has_signal(dw_dev, input))
>>>>> +		return -EINVAL;
>>>> Why would this be a reason to reject this? There may be no signal now, but a signal
>>>> might appear later.
>>> I would expect s_routing to only be called if there is an input
>>> connected, otherwise we are just wasting resources by trying to
>>> equalize an input that is not present ... I can remove the "if"
>>> as there are other safe guards for this though (for example g_fmt
>>> will return an error) ...
>> No, s_routing is typically called as a result of a VIDIOC_S_INPUT
>> call, and that can come whether or not there is a signal on an
>> input. In fact, initially the first input is always selected anyway,
>> whether or not there is a signal.
>>
>> g_fmt will just return the current configured format, this is unrelated
>> to whether or not there is a signal.
>>
>> The only times the driver checks whether or not there is a signal (and
>> what that is) are:
>>
>> 1) g_input_status
>> 2) query_dv_timings
>> 3) when the irq detects a signal change and sends V4L2_EVENT_SOURCE_CHANGE
> 
> Ok, I will remove the checks then.
> 
>>
>>>>> +	msleep(50); /* Wait for 1 field */
>>>> How do you know this waits for 1 field? Or is this: "Wait for at least 1 field"?
>>> Its wait at least for 1 field. This is over-generous because its
>>> assuming the frame rate is 20fps (which in HDMI does not happen).
>> With custom timings it can happen (i.e. a 15 fps stream). Admittedly, it's not
>> common, but people sometimes use it.
>>
>>>> I don't know exactly how the IP does this, but it looks fishy to me. If it is
>>>> correct, then it could use a few comments about what is going on here as it is
>>>> not obvious.
>>> The IP updates the values at each field but I need to change this
>>> register to populate all values in the bt struct.
>> How do you know which field (top or bottom) you've captured? How do you know you
>> didn't miss e.g. the bottom field and instead end up with two top field measurements?
>>
>> The top and bottom field are almost, but not quite the same. Typically the vertical
>> backporch of the fields differs by 1 where the second field's backporch is larger by 1 line.
>>
>>>> And what happens if the framerate is even slower? You know the pixelclock and
>>>> total width+height, so you can calculate the framerate from that.
>>> Hmm, but then I have to consider pixelclk error, msleep error, ...
>> But you have that now as well.
>>
>> An alternative is to measure a single field and deduce the backporch values from that.
>>
>> At least for all the common HDMI interlaced formats il_vbackporch is an even value and
>> vbackporch is il_vbackporch - 1.
>>
>> So if you get an even backporch, then you found il_vbackporch, and if it is odd, then
>> you found vbackporch.
>>
>>>>> +	bt->vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>>>> +
>>>>> +	hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>>>>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>>>> +			HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>>>> +	msleep(50); /* Wait for 1 field */
>>>>> +	bt->vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>>>> +	bt->vfrontporch = vtot - bt->height - bt->vsync - bt->vbackporch;
>>>>> +
>>>>> +	if (bt->interlaced == V4L2_DV_INTERLACED) {
>>>>> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>>>>> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
>>>>> +				HDMI_MD_VCTRL_V_MODE_MASK);
>>>>> +		msleep(100); /* Wait for 2 fields */
>>>>> +
>>>>> +		vtot = hdmi_readl(dw_dev, HDMI_MD_VTL);
>>>>> +		hdmi_mask_writel(dw_dev, 0x1, HDMI_MD_VCTRL,
>>>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>>>> +		msleep(50); /* Wait for 1 field */
>>>>> +		bt->il_vsync = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>>>> +
>>>>> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>>>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_OFFSET,
>>>>> +				HDMI_MD_VCTRL_V_OFFS_LIN_MODE_MASK);
>>>>> +		msleep(50);
>>>>> +		bt->il_vbackporch = hdmi_readl(dw_dev, HDMI_MD_VOL);
>>>>> +		bt->il_vfrontporch = vtot - bt->height - bt->il_vsync -
>>>>> +			bt->il_vbackporch;
>>>>> +
>>>>> +		hdmi_mask_writel(dw_dev, 0x0, HDMI_MD_VCTRL,
>>>>> +				HDMI_MD_VCTRL_V_MODE_OFFSET,
>>>>> +				HDMI_MD_VCTRL_V_MODE_MASK);
>>>> Same here, I'm not sure this is correct. What is the output of
>>>> 'v4l2-ctl --query-dv-timings' when you feed it a standard interlaced format?
>>> I used v4l2-ctl --log-status with interlaced format and
>>> everything seemed correct ...
>> Can you show a few examples? Is vbackport odd? And is il_vbackporch equal to vbackporch + 1?
>>
>> Interlaced is tricky :-)
> 
> Indeed. I compared the values with the spec and they are not
> correct. Even hsync is wrong. I already corrected in the code the
> hsync but regarding interlace I'm not seeing an easy way to do
> this without using interrupts in each vsync because the register
> I was toggling does not behave as I expected (I misunderstood the
> databook). Maybe we should not detect interlaced modes for now?
> Or not fill the il_ fields?

As I mentioned above you as long as you get a good backporch value you
can deduce from whether it is an odd or even number to which field it
belongs and fill in the other values. So I think you only need to read
these values for one field.

Filling in good values here (at least as far as is possible since not all
hardware can give it) will help debugging issues, even if you otherwise do
not support interlaced.

Regards,

	Hans

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Jose Abreu]

Hi Hans,

On 13-12-2017 20:49, Hans Verkuil wrote:
> On 13/12/17 15:00, Jose Abreu wrote:
>>
>> Indeed. I compared the values with the spec and they are not
>> correct. Even hsync is wrong. I already corrected in the code the
>> hsync but regarding interlace I'm not seeing an easy way to do
>> this without using interrupts in each vsync because the register
>> I was toggling does not behave as I expected (I misunderstood the
>> databook). Maybe we should not detect interlaced modes for now?
>> Or not fill the il_ fields?
> As I mentioned above you as long as you get a good backporch value you
> can deduce from whether it is an odd or even number to which field it
> belongs and fill in the other values. So I think you only need to read
> these values for one field.
>
> Filling in good values here (at least as far as is possible since not all
> hardware can give it) will help debugging issues, even if you otherwise do
> not support interlaced.

Ok, I will fill the fields.

Until the end of January I will be quite busy in another project
so if you could review the remaining patches of this series I
would appreciate very much ... This way when I have the time I
can code all the changes and send them at once.

Thanks and Best Regards,
Jose Miguel Abreu

>
> Regards,
>
> 	Hans

Re: [PATCH v10 1/4] dt-bindings: media: Document Synopsys DesignWare HDMI RX

[Hans Verkuil]

On 11/12/17 18:41, Jose Abreu wrote:
> Document the bindings for the Synopsys DesignWare HDMI RX.
> 
> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
> Acked-by: Rob Herring <robh@kernel.org> (v8)
> Cc: Joao Pinto <jpinto@synopsys.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Hans Verkuil <hans.verkuil@cisco.com>
> Cc: Sylwester Nawrocki <snawrocki@kernel.org>
> Cc: devicetree@vger.kernel.org

Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>

Regards,

	Hans

> ---
> Changes from v7:
> 	- Remove SoC specific bindings (Rob)
> Changes from v6:
> 	- Document which properties are required/optional (Sylwester)
> 	- Drop compatible string for SoC (Sylwester)
> 	- Reword edid-phandle property (Sylwester)
> 	- Typo fixes (Sylwester)
> Changes from v4:
> 	- Use "cfg" instead of "cfg-clk" (Rob)
> 	- Change node names (Rob)
> Changes from v3:
> 	- Document the new DT bindings suggested by Sylwester
> Changes from v2:
> 	- Document edid-phandle property
> ---
>  .../devicetree/bindings/media/snps,dw-hdmi-rx.txt  | 58 ++++++++++++++++++++++
>  1 file changed, 58 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt
> 
> diff --git a/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt
> new file mode 100644
> index 0000000..1dc09c6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt
> @@ -0,0 +1,58 @@
> +Synopsys DesignWare HDMI RX Decoder
> +===================================
> +
> +This document defines device tree properties for the Synopsys DesignWare HDMI
> +RX Decoder (DWC HDMI RX).
> +
> +The properties bellow belong to the Synopsys DesignWare HDMI RX Decoder node.
> +
> +Required properties:
> +
> +- compatible: Shall be "snps,dw-hdmi-rx".
> +- reg: Memory mapped base address and length of the DWC HDMI RX registers.
> +- interrupts: Reference to the DWC HDMI RX interrupt and the HDMI 5V sense
> +interrupt.
> +- clocks: Reference to the config clock.
> +- clock-names: Shall be "cfg".
> +- #address-cells: Shall be 1.
> +- #size-cells: Shall be 0.
> +
> +Optional properties:
> +
> +- edid-phandle: Reference to the EDID handler block; if this property is not
> +specified it is assumed that EDID is handled by device described by parent
> +node of the HDMI RX node. You should not specify this property if your HDMI RX
> +controller does not have CEC.
> +
> +You also have to create a subnode for the PHY device. PHY node properties are
> +as follows.
> +
> +Required properties:
> +
> +- compatible: Shall be "snps,dw-hdmi-phy-e405".
> +- reg: Shall be the JTAG address of the PHY.
> +- clocks: Reference to the config clock.
> +- clock-names: Shall be "cfg".
> +
> +Example:
> +
> +hdmi_rx: hdmi-rx@0 {
> +	compatible = "snps,dw-hdmi-rx";
> +	reg = <0x0 0x10000>;
> +	interrupts = <1 2>;
> +	edid-phandle = <&dw_hdmi_edid>;
> +
> +	clocks = <&dw_hdmi_refclk>;
> +	clock-names = "cfg";
> +
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +
> +	hdmi-phy@fc {
> +		compatible = "snps,dw-hdmi-phy-e405";
> +		reg = <0xfc>;
> +
> +		clocks = <&dw_hdmi_refclk>;
> +		clock-names = "cfg";
> +	};
> +};
> 

Re: [PATCH v10 2/4] MAINTAINERS: Add entry for Synopsys DesignWare HDMI drivers

[Hans Verkuil]

On 11/12/17 18:41, Jose Abreu wrote:
> Add an entry for Synopsys DesignWare HDMI Receivers drivers
> and phys.
> 
> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
> Cc: Joao Pinto <jpinto@synopsys.com>

Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>

Regards,

	Hans



> ---
>  MAINTAINERS | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 7a52a66..a1675bc 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -13108,6 +13108,13 @@ L:	netdev@vger.kernel.org
>  S:	Supported
>  F:	drivers/net/ethernet/synopsys/
>  
> +SYNOPSYS DESIGNWARE HDMI RECEIVERS AND PHY DRIVERS
> +M:	Jose Abreu <joabreu@synopsys.com>
> +L:	linux-media@vger.kernel.org
> +S:	Maintained
> +F:	drivers/media/platform/dwc/*
> +F:	include/media/dwc/*
> +
>  SYNOPSYS DESIGNWARE I2C DRIVER
>  M:	Jarkko Nikula <jarkko.nikula@linux.intel.com>
>  R:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> 

Re: [PATCH v10 2/4] MAINTAINERS: Add entry for Synopsys DesignWare HDMI drivers

[Hans Verkuil]

On 15/12/17 14:35, Hans Verkuil wrote:
> On 11/12/17 18:41, Jose Abreu wrote:
>> Add an entry for Synopsys DesignWare HDMI Receivers drivers
>> and phys.
>>
>> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
>> Cc: Joao Pinto <jpinto@synopsys.com>
> 
> Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>

Oops, I was a bit too quick here. You're missing this file:

Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt

Regards,

	Hans

> 
> Regards,
> 
> 	Hans
> 
> 
> 
>> ---
>>  MAINTAINERS | 7 +++++++
>>  1 file changed, 7 insertions(+)
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 7a52a66..a1675bc 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -13108,6 +13108,13 @@ L:	netdev@vger.kernel.org
>>  S:	Supported
>>  F:	drivers/net/ethernet/synopsys/
>>  
>> +SYNOPSYS DESIGNWARE HDMI RECEIVERS AND PHY DRIVERS
>> +M:	Jose Abreu <joabreu@synopsys.com>
>> +L:	linux-media@vger.kernel.org
>> +S:	Maintained
>> +F:	drivers/media/platform/dwc/*
>> +F:	include/media/dwc/*
>> +
>>  SYNOPSYS DESIGNWARE I2C DRIVER
>>  M:	Jarkko Nikula <jarkko.nikula@linux.intel.com>
>>  R:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
>>
> 

Re: [PATCH v10 3/4] [media] platform: Add Synopsys DesignWare HDMI RX PHY e405 Driver

[Hans Verkuil]

On 11/12/17 18:41, Jose Abreu wrote:
> This adds support for the Synopsys DesignWare HDMI RX PHY e405. This
> phy receives and decodes HDMI video that is delivered to a controller.
> 
> Main features included in this driver are:
> 	- Equalizer algorithm that chooses the phy best settings
> 	according to the detected HDMI cable characteristics.
> 	- Support for scrambling
> 	- Support for HDMI 2.0 modes up to 6G (HDMI 4k@60Hz).
> 
> The driver was implemented as a standalone V4L2 subdevice and the
> phy interface with the controller was implemented using V4L2 ioctls. I
> do not know if this is the best option but it is not possible to use the
> existing API functions directly as we need specific functions that will
> be called by the controller at specific configuration stages.
> 
> There is also a bidirectional communication between controller and phy:
> The phy must provide functions that the controller will call (i.e.
> configuration functions) and the controller must provide read/write
> callbacks, as well as other specific functions.
> 
> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
> Cc: Joao Pinto <jpinto@synopsys.com>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Hans Verkuil <hans.verkuil@cisco.com>
> Cc: Sylwester Nawrocki <snawrocki@kernel.org>
> Cc: Philippe Ombredanne <pombredanne@nexb.com>

Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>

Regards,

	Hans

> ---
> Changes from v9:
> 	- Use SPDX License ID (Philippe)
> Changes from v4:
> 	- Use usleep_range (Sylwester)
> 	- Remove some comments (Sylwester)
> 	- Parse phy version from of_device_id (Sylwester)
> 	- Use "cfg" instead of "cfg-clk" (Sylwester, Rob)
> 	- Change some messages to dev_dbg (Sylwester)
> Changes from v3:
> 	- Use v4l2 async API (Sylwester)
> 	- Use clock API (Sylwester)
> 	- Add compatible string (Sylwester)
> Changes from RFC:
> 	- Remove a bunch of functions that can be collapsed into
> 	a single config() function
> 	- Add comments for the callbacks and structures (Hans)
> ---
>  drivers/media/platform/Kconfig                |   2 +
>  drivers/media/platform/Makefile               |   2 +
>  drivers/media/platform/dwc/Kconfig            |   8 +
>  drivers/media/platform/dwc/Makefile           |   1 +
>  drivers/media/platform/dwc/dw-hdmi-phy-e405.c | 822 ++++++++++++++++++++++++++
>  drivers/media/platform/dwc/dw-hdmi-phy-e405.h |  41 ++
>  include/media/dwc/dw-hdmi-phy-pdata.h         | 106 ++++
>  7 files changed, 982 insertions(+)
>  create mode 100644 drivers/media/platform/dwc/Kconfig
>  create mode 100644 drivers/media/platform/dwc/Makefile
>  create mode 100644 drivers/media/platform/dwc/dw-hdmi-phy-e405.c
>  create mode 100644 drivers/media/platform/dwc/dw-hdmi-phy-e405.h
>  create mode 100644 include/media/dwc/dw-hdmi-phy-pdata.h
> 
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index fd0c998..0187cbd 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -33,6 +33,8 @@ source "drivers/media/platform/omap/Kconfig"
>  
>  source "drivers/media/platform/blackfin/Kconfig"
>  
> +source "drivers/media/platform/dwc/Kconfig"
> +
>  config VIDEO_SH_VOU
>  	tristate "SuperH VOU video output driver"
>  	depends on MEDIA_CAMERA_SUPPORT
> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
> index 003b0bb..2e879c6 100644
> --- a/drivers/media/platform/Makefile
> +++ b/drivers/media/platform/Makefile
> @@ -97,3 +97,5 @@ obj-$(CONFIG_VIDEO_QCOM_CAMSS)		+= qcom/camss-8x16/
>  obj-$(CONFIG_VIDEO_QCOM_VENUS)		+= qcom/venus/
>  
>  obj-y					+= meson/
> +
> +obj-y					+= dwc/
> diff --git a/drivers/media/platform/dwc/Kconfig b/drivers/media/platform/dwc/Kconfig
> new file mode 100644
> index 0000000..361d38d
> --- /dev/null
> +++ b/drivers/media/platform/dwc/Kconfig
> @@ -0,0 +1,8 @@
> +config VIDEO_DWC_HDMI_PHY_E405
> +	tristate "Synopsys Designware HDMI RX PHY e405 driver"
> +	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
> +	help
> +	  Support for Synopsys Designware HDMI RX PHY. Version is e405.
> +
> +	  To compile this driver as a module, choose M here. The module
> +	  will be called dw-hdmi-phy-e405.
> diff --git a/drivers/media/platform/dwc/Makefile b/drivers/media/platform/dwc/Makefile
> new file mode 100644
> index 0000000..fc3b62c
> --- /dev/null
> +++ b/drivers/media/platform/dwc/Makefile
> @@ -0,0 +1 @@
> +obj-$(CONFIG_VIDEO_DWC_HDMI_PHY_E405) += dw-hdmi-phy-e405.o
> diff --git a/drivers/media/platform/dwc/dw-hdmi-phy-e405.c b/drivers/media/platform/dwc/dw-hdmi-phy-e405.c
> new file mode 100644
> index 0000000..e781cc1
> --- /dev/null
> +++ b/drivers/media/platform/dwc/dw-hdmi-phy-e405.c
> @@ -0,0 +1,822 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +// Copyright (c) 2017 Synopsys, Inc. and/or its affiliates.
> +// Synopsys DesignWare HDMI PHY e405 driver
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/types.h>
> +#include <media/v4l2-async.h>
> +#include <media/v4l2-subdev.h>
> +#include <media/dwc/dw-hdmi-phy-pdata.h>
> +#include "dw-hdmi-phy-e405.h"
> +
> +MODULE_AUTHOR("Jose Abreu <joabreu@synopsys.com>");
> +MODULE_DESCRIPTION("Designware HDMI PHY e405 driver");
> +MODULE_LICENSE("Dual MIT/GPL");
> +
> +#define PHY_EQ_WAIT_TIME_START			3
> +#define PHY_EQ_SLEEP_TIME_CDR			30
> +#define PHY_EQ_SLEEP_TIME_ACQ			1
> +#define PHY_EQ_BOUNDSPREAD			20
> +#define PHY_EQ_MIN_ACQ_STABLE			3
> +#define PHY_EQ_ACC_LIMIT			360
> +#define PHY_EQ_ACC_MIN_LIMIT			0
> +#define PHY_EQ_MAX_SETTING			13
> +#define PHY_EQ_SHORT_CABLE_SETTING		4
> +#define PHY_EQ_ERROR_CABLE_SETTING		4
> +#define PHY_EQ_MIN_SLOPE			50
> +#define PHY_EQ_AVG_ACQ				5
> +#define PHY_EQ_MINMAX_NTRIES			3
> +#define PHY_EQ_EQUALIZED_COUNTER_VAL		512
> +#define PHY_EQ_EQUALIZED_COUNTER_VAL_HDMI20	512
> +#define PHY_EQ_MINMAX_MAXDIFF			4
> +#define PHY_EQ_MINMAX_MAXDIFF_HDMI20		2
> +#define PHY_EQ_FATBIT_MASK			0x0000
> +#define PHY_EQ_FATBIT_MASK_4K			0x0c03
> +#define PHY_EQ_FATBIT_MASK_HDMI20		0x0e03
> +
> +struct dw_phy_eq_ch {
> +	u16 best_long_setting;
> +	u8 valid_long_setting;
> +	u16 best_short_setting;
> +	u8 valid_short_setting;
> +	u16 best_setting;
> +	u16 acc;
> +	u16 acq;
> +	u16 last_acq;
> +	u16 upper_bound_acq;
> +	u16 lower_bound_acq;
> +	u16 out_bound_acq;
> +	u16 read_acq;
> +};
> +
> +static const struct dw_phy_mpll_config {
> +	u16 addr;
> +	u16 val;
> +} dw_phy_e405_mpll_cfg[] = {
> +	{ 0x27, 0x1B94 },
> +	{ 0x28, 0x16D2 },
> +	{ 0x29, 0x12D9 },
> +	{ 0x2A, 0x3249 },
> +	{ 0x2B, 0x3653 },
> +	{ 0x2C, 0x3436 },
> +	{ 0x2D, 0x124D },
> +	{ 0x2E, 0x0001 },
> +	{ 0xCE, 0x0505 },
> +	{ 0xCF, 0x0505 },
> +	{ 0xD0, 0x0000 },
> +	{ 0x00, 0x0000 },
> +};
> +
> +struct dw_phy_dev {
> +	struct device *dev;
> +	struct dw_phy_pdata *config;
> +	unsigned int version;
> +	struct clk *clk;
> +	u16 cfg_clk;
> +	bool phy_enabled;
> +	struct v4l2_subdev sd;
> +	u16 mpll_status;
> +	unsigned char color_depth;
> +	bool hdmi2;
> +	bool scrambling;
> +	struct mutex lock;
> +};
> +
> +static inline struct dw_phy_dev *to_dw_dev(struct v4l2_subdev *sd)
> +{
> +	return container_of(sd, struct dw_phy_dev, sd);
> +}
> +
> +static void phy_write(struct dw_phy_dev *dw_dev, u16 val, u16 addr)
> +{
> +	void *arg = dw_dev->config->funcs_arg;
> +
> +	dw_dev->config->funcs->write(arg, val, addr);
> +}
> +
> +static u16 phy_read(struct dw_phy_dev *dw_dev, u16 addr)
> +{
> +	void *arg = dw_dev->config->funcs_arg;
> +
> +	return dw_dev->config->funcs->read(arg, addr);
> +}
> +
> +static void phy_reset(struct dw_phy_dev *dw_dev, int enable)
> +{
> +	void *arg = dw_dev->config->funcs_arg;
> +
> +	dw_dev->config->funcs->reset(arg, enable);
> +}
> +
> +static void phy_pddq(struct dw_phy_dev *dw_dev, int enable)
> +{
> +	void *arg = dw_dev->config->funcs_arg;
> +
> +	dw_dev->config->funcs->pddq(arg, enable);
> +}
> +
> +static void phy_svsmode(struct dw_phy_dev *dw_dev, int enable)
> +{
> +	void *arg = dw_dev->config->funcs_arg;
> +
> +	dw_dev->config->funcs->svsmode(arg, enable);
> +}
> +
> +static void phy_zcal_reset(struct dw_phy_dev *dw_dev)
> +{
> +	void *arg = dw_dev->config->funcs_arg;
> +
> +	dw_dev->config->funcs->zcal_reset(arg);
> +}
> +
> +static bool phy_zcal_done(struct dw_phy_dev *dw_dev)
> +{
> +	void *arg = dw_dev->config->funcs_arg;
> +
> +	return dw_dev->config->funcs->zcal_done(arg);
> +}
> +
> +static bool phy_tmds_valid(struct dw_phy_dev *dw_dev)
> +{
> +	void *arg = dw_dev->config->funcs_arg;
> +
> +	return dw_dev->config->funcs->tmds_valid(arg);
> +}
> +
> +static int dw_phy_eq_test(struct dw_phy_dev *dw_dev,
> +		u16 *fat_bit_mask, int *min_max_length)
> +{
> +	u16 main_fsm_status, val;
> +	int i;
> +
> +	for (i = 0; i < PHY_EQ_WAIT_TIME_START; i++) {
> +		main_fsm_status = phy_read(dw_dev, PHY_MAINFSM_STATUS1);
> +		if (main_fsm_status & 0x100)
> +			break;
> +		mdelay(PHY_EQ_SLEEP_TIME_CDR);
> +	}
> +
> +	if (i == PHY_EQ_WAIT_TIME_START) {
> +		dev_dbg(dw_dev->dev, "phy start conditions not achieved\n");
> +		return -ETIMEDOUT;
> +	}
> +
> +	if (main_fsm_status & 0x400) {
> +		dev_dbg(dw_dev->dev, "invalid pll rate\n");
> +		return -EINVAL;
> +	}
> +
> +	val = (phy_read(dw_dev, PHY_CDR_CTRL_CNT) & 0x300) >> 8;
> +	if (val == 0x1) {
> +		/* HDMI 2.0 */
> +		*fat_bit_mask = PHY_EQ_FATBIT_MASK_HDMI20;
> +		*min_max_length = PHY_EQ_MINMAX_MAXDIFF_HDMI20;
> +		dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 2.0 values\n");
> +	} else if (!(main_fsm_status & 0x600)) {
> +		/* HDMI 1.4 (pll rate = 0) */
> +		*fat_bit_mask = PHY_EQ_FATBIT_MASK_4K;
> +		*min_max_length = PHY_EQ_MINMAX_MAXDIFF;
> +		dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 1.4@4k values\n");
> +	} else {
> +		/* HDMI 1.4 */
> +		*fat_bit_mask = PHY_EQ_FATBIT_MASK;
> +		*min_max_length = PHY_EQ_MINMAX_MAXDIFF;
> +		dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 1.4 values\n");
> +	}
> +
> +	return 0;
> +}
> +
> +static void dw_phy_eq_default(struct dw_phy_dev *dw_dev)
> +{
> +	phy_write(dw_dev, 0x08A8, PHY_CH0_EQ_CTRL1);
> +	phy_write(dw_dev, 0x0020, PHY_CH0_EQ_CTRL2);
> +	phy_write(dw_dev, 0x08A8, PHY_CH1_EQ_CTRL1);
> +	phy_write(dw_dev, 0x0020, PHY_CH1_EQ_CTRL2);
> +	phy_write(dw_dev, 0x08A8, PHY_CH2_EQ_CTRL1);
> +	phy_write(dw_dev, 0x0020, PHY_CH2_EQ_CTRL2);
> +}
> +
> +static void dw_phy_eq_single(struct dw_phy_dev *dw_dev)
> +{
> +	phy_write(dw_dev, 0x0211, PHY_CH0_EQ_CTRL1);
> +	phy_write(dw_dev, 0x0211, PHY_CH1_EQ_CTRL1);
> +	phy_write(dw_dev, 0x0211, PHY_CH2_EQ_CTRL1);
> +}
> +
> +static void dw_phy_eq_equal_setting(struct dw_phy_dev *dw_dev,
> +		u16 lock_vector)
> +{
> +	phy_write(dw_dev, lock_vector, PHY_CH0_EQ_CTRL4);
> +	phy_write(dw_dev, 0x0024, PHY_CH0_EQ_CTRL2);
> +	phy_write(dw_dev, 0x0026, PHY_CH0_EQ_CTRL2);
> +	phy_read(dw_dev, PHY_CH0_EQ_STATUS2);
> +	phy_write(dw_dev, lock_vector, PHY_CH1_EQ_CTRL4);
> +	phy_write(dw_dev, 0x0024, PHY_CH1_EQ_CTRL2);
> +	phy_write(dw_dev, 0x0026, PHY_CH1_EQ_CTRL2);
> +	phy_read(dw_dev, PHY_CH1_EQ_STATUS2);
> +	phy_write(dw_dev, lock_vector, PHY_CH2_EQ_CTRL4);
> +	phy_write(dw_dev, 0x0024, PHY_CH2_EQ_CTRL2);
> +	phy_write(dw_dev, 0x0026, PHY_CH2_EQ_CTRL2);
> +	phy_read(dw_dev, PHY_CH2_EQ_STATUS2);
> +}
> +
> +static void dw_phy_eq_equal_setting_ch0(struct dw_phy_dev *dw_dev,
> +		u16 lock_vector)
> +{
> +	phy_write(dw_dev, lock_vector, PHY_CH0_EQ_CTRL4);
> +	phy_write(dw_dev, 0x0024, PHY_CH0_EQ_CTRL2);
> +	phy_write(dw_dev, 0x0026, PHY_CH0_EQ_CTRL2);
> +	phy_read(dw_dev, PHY_CH0_EQ_STATUS2);
> +}
> +
> +static void dw_phy_eq_equal_setting_ch1(struct dw_phy_dev *dw_dev,
> +		u16 lock_vector)
> +{
> +	phy_write(dw_dev, lock_vector, PHY_CH1_EQ_CTRL4);
> +	phy_write(dw_dev, 0x0024, PHY_CH1_EQ_CTRL2);
> +	phy_write(dw_dev, 0x0026, PHY_CH1_EQ_CTRL2);
> +	phy_read(dw_dev, PHY_CH1_EQ_STATUS2);
> +}
> +
> +static void dw_phy_eq_equal_setting_ch2(struct dw_phy_dev *dw_dev,
> +		u16 lock_vector)
> +{
> +	phy_write(dw_dev, lock_vector, PHY_CH2_EQ_CTRL4);
> +	phy_write(dw_dev, 0x0024, PHY_CH2_EQ_CTRL2);
> +	phy_write(dw_dev, 0x0026, PHY_CH2_EQ_CTRL2);
> +	phy_read(dw_dev, PHY_CH2_EQ_STATUS2);
> +}
> +
> +static void dw_phy_eq_auto_calib(struct dw_phy_dev *dw_dev)
> +{
> +	phy_write(dw_dev, 0x1809, PHY_MAINFSM_CTRL);
> +	phy_write(dw_dev, 0x1819, PHY_MAINFSM_CTRL);
> +	phy_write(dw_dev, 0x1809, PHY_MAINFSM_CTRL);
> +}
> +
> +static void dw_phy_eq_init_vars(struct dw_phy_eq_ch *ch)
> +{
> +	ch->acc = 0;
> +	ch->acq = 0;
> +	ch->last_acq = 0;
> +	ch->valid_long_setting = 0;
> +	ch->valid_short_setting = 0;
> +	ch->best_setting = PHY_EQ_SHORT_CABLE_SETTING;
> +}
> +
> +static bool dw_phy_eq_acquire_early_cnt(struct dw_phy_dev *dw_dev,
> +		u16 setting, u16 acq, struct dw_phy_eq_ch *ch0,
> +		struct dw_phy_eq_ch *ch1, struct dw_phy_eq_ch *ch2)
> +{
> +	u16 lock_vector = 0x1;
> +	int i;
> +
> +	lock_vector <<= setting;
> +	ch0->out_bound_acq = 0;
> +	ch1->out_bound_acq = 0;
> +	ch2->out_bound_acq = 0;
> +	ch0->acq = 0;
> +	ch1->acq = 0;
> +	ch2->acq = 0;
> +
> +	dw_phy_eq_equal_setting(dw_dev, lock_vector);
> +	dw_phy_eq_auto_calib(dw_dev);
> +
> +	mdelay(PHY_EQ_SLEEP_TIME_CDR);
> +	if (!phy_tmds_valid(dw_dev))
> +		dev_dbg(dw_dev->dev, "TMDS is NOT valid\n");
> +
> +	ch0->read_acq = phy_read(dw_dev, PHY_CH0_EQ_STATUS3);
> +	ch1->read_acq = phy_read(dw_dev, PHY_CH1_EQ_STATUS3);
> +	ch2->read_acq = phy_read(dw_dev, PHY_CH2_EQ_STATUS3);
> +
> +	ch0->acq += ch0->read_acq;
> +	ch1->acq += ch1->read_acq;
> +	ch2->acq += ch2->read_acq;
> +
> +	ch0->upper_bound_acq = ch0->read_acq + PHY_EQ_BOUNDSPREAD;
> +	ch0->lower_bound_acq = ch0->read_acq - PHY_EQ_BOUNDSPREAD;
> +	ch1->upper_bound_acq = ch1->read_acq + PHY_EQ_BOUNDSPREAD;
> +	ch1->lower_bound_acq = ch1->read_acq - PHY_EQ_BOUNDSPREAD;
> +	ch2->upper_bound_acq = ch2->read_acq + PHY_EQ_BOUNDSPREAD;
> +	ch2->lower_bound_acq = ch2->read_acq - PHY_EQ_BOUNDSPREAD;
> +
> +	for (i = 1; i < acq; i++) {
> +		dw_phy_eq_auto_calib(dw_dev);
> +		mdelay(PHY_EQ_SLEEP_TIME_ACQ);
> +
> +		if ((ch0->read_acq > ch0->upper_bound_acq) ||
> +				(ch0->read_acq < ch0->lower_bound_acq))
> +			ch0->out_bound_acq++;
> +		if ((ch1->read_acq > ch1->upper_bound_acq) ||
> +				(ch1->read_acq < ch1->lower_bound_acq))
> +			ch1->out_bound_acq++;
> +		if ((ch2->read_acq > ch2->upper_bound_acq) ||
> +				(ch2->read_acq < ch1->lower_bound_acq))
> +			ch2->out_bound_acq++;
> +
> +		if (i == PHY_EQ_MIN_ACQ_STABLE) {
> +			if ((ch0->out_bound_acq == 0) &&
> +					(ch1->out_bound_acq == 0) &&
> +					(ch2->out_bound_acq == 0)) {
> +				acq = 3;
> +				break;
> +			}
> +		}
> +
> +		ch0->read_acq = phy_read(dw_dev, PHY_CH0_EQ_STATUS3);
> +		ch1->read_acq = phy_read(dw_dev, PHY_CH1_EQ_STATUS3);
> +		ch2->read_acq = phy_read(dw_dev, PHY_CH2_EQ_STATUS3);
> +
> +		ch0->acq += ch0->read_acq;
> +		ch1->acq += ch1->read_acq;
> +		ch2->acq += ch2->read_acq;
> +	}
> +
> +	ch0->acq = ch0->acq / acq;
> +	ch1->acq = ch1->acq / acq;
> +	ch2->acq = ch2->acq / acq;
> +
> +	return true;
> +}
> +
> +static int dw_phy_eq_test_type(u16 setting, bool tmds_valid,
> +		struct dw_phy_eq_ch *ch)
> +{
> +	u16 step_slope = 0;
> +
> +	if ((ch->acq < ch->last_acq) && tmds_valid) {
> +		/* Long cable equalization */
> +		ch->acc += ch->last_acq - ch->acq;
> +		if ((ch->valid_long_setting == 0) && (ch->acq < 512) &&
> +				(ch->acc > 0)) {
> +			ch->best_long_setting = setting;
> +			ch->valid_long_setting = 1;
> +		}
> +		step_slope = ch->last_acq - ch->acq;
> +	}
> +
> +	if (tmds_valid && (ch->valid_short_setting == 0)) {
> +		/* Short cable equalization */
> +		if ((setting < PHY_EQ_SHORT_CABLE_SETTING) &&
> +				(ch->acq < PHY_EQ_EQUALIZED_COUNTER_VAL)) {
> +			ch->best_short_setting= setting;
> +			ch->valid_short_setting = 1;
> +		}
> +
> +		if (setting == PHY_EQ_SHORT_CABLE_SETTING) {
> +			ch->best_short_setting = PHY_EQ_SHORT_CABLE_SETTING;
> +			ch->valid_short_setting = 1;
> +		}
> +	}
> +
> +	if (ch->valid_long_setting && (ch->acc > PHY_EQ_ACC_LIMIT)) {
> +		ch->best_setting = ch->best_long_setting;
> +		return 1;
> +	}
> +
> +	if ((setting == PHY_EQ_MAX_SETTING) && (ch->acc < PHY_EQ_ACC_LIMIT) &&
> +			ch->valid_short_setting) {
> +		ch->best_setting = ch->best_short_setting;
> +		return 2;
> +	}
> +
> +	if ((setting == PHY_EQ_MAX_SETTING) && tmds_valid &&
> +			(ch->acc > PHY_EQ_ACC_LIMIT) &&
> +			(step_slope > PHY_EQ_MIN_SLOPE)) {
> +		ch->best_setting = PHY_EQ_MAX_SETTING;
> +		return 3;
> +	}
> +
> +	if (setting == PHY_EQ_MAX_SETTING) {
> +		ch->best_setting = PHY_EQ_ERROR_CABLE_SETTING;
> +		return 255;
> +	}
> +
> +	return 0;
> +}
> +
> +static bool dw_phy_eq_setting_finder(struct dw_phy_dev *dw_dev, u16 acq,
> +		struct dw_phy_eq_ch *ch0, struct dw_phy_eq_ch *ch1,
> +		struct dw_phy_eq_ch *ch2)
> +{
> +	u16 act = 0;
> +	int ret_ch0 = 0, ret_ch1 = 0, ret_ch2 = 0;
> +	bool tmds_valid = false;
> +
> +	dw_phy_eq_init_vars(ch0);
> +	dw_phy_eq_init_vars(ch1);
> +	dw_phy_eq_init_vars(ch2);
> +
> +	tmds_valid = dw_phy_eq_acquire_early_cnt(dw_dev, act, acq,
> +			ch0, ch1, ch2);
> +
> +	while ((ret_ch0 == 0) || (ret_ch1 == 0) || (ret_ch2 == 0)) {
> +		act++;
> +
> +		ch0->last_acq = ch0->acq;
> +		ch1->last_acq = ch1->acq;
> +		ch2->last_acq = ch2->acq;
> +
> +		tmds_valid = dw_phy_eq_acquire_early_cnt(dw_dev, act, acq,
> +				ch0, ch1, ch2);
> +
> +		if (!ret_ch0)
> +			ret_ch0 = dw_phy_eq_test_type(act, tmds_valid, ch0);
> +		if (!ret_ch1)
> +			ret_ch1 = dw_phy_eq_test_type(act, tmds_valid, ch1);
> +		if (!ret_ch2)
> +			ret_ch2 = dw_phy_eq_test_type(act, tmds_valid, ch2);
> +	}
> +
> +	if ((ret_ch0 == 255) || (ret_ch1 == 255) || (ret_ch2 == 255))
> +		return false;
> +	return true;
> +}
> +
> +static bool dw_phy_eq_maxvsmin(u16 ch0_setting, u16 ch1_setting,
> +		u16 ch2_setting, u16 min_max_length)
> +{
> +	u16 min = ch0_setting, max = ch0_setting;
> +
> +	if (ch1_setting > max)
> +		max = ch1_setting;
> +	if (ch2_setting > max)
> +		max = ch2_setting;
> +	if (ch1_setting < min)
> +		min = ch1_setting;
> +	if (ch2_setting < min)
> +		min = ch2_setting;
> +
> +	if ((max - min) > min_max_length)
> +		return false;
> +	return true;
> +}
> +
> +static int dw_phy_eq_init(struct dw_phy_dev *dw_dev, u16 acq, bool force)
> +{
> +	struct dw_phy_eq_ch ch0, ch1, ch2;
> +	u16 fat_bit_mask, lock_vector = 0x1;
> +	int min_max_length, i, ret = 0;
> +	u16 mpll_status;
> +
> +	if (dw_dev->version < 401)
> +		return ret;
> +	if (!dw_dev->phy_enabled)
> +		return -EINVAL;
> +
> +	mpll_status = phy_read(dw_dev, PHY_CLK_MPLL_STATUS);
> +	if (mpll_status == dw_dev->mpll_status && !force)
> +		return ret;
> +	dw_dev->mpll_status = mpll_status;
> +
> +	phy_write(dw_dev, 0x00, PHY_MAINFSM_OVR2);
> +	phy_write(dw_dev, 0x00, PHY_CH0_EQ_CTRL3);
> +	phy_write(dw_dev, 0x00, PHY_CH1_EQ_CTRL3);
> +	phy_write(dw_dev, 0x00, PHY_CH2_EQ_CTRL3);
> +
> +	ret = dw_phy_eq_test(dw_dev, &fat_bit_mask, &min_max_length);
> +	if (ret) {
> +		if (ret == -EINVAL) /* Means equalizer is not needed */
> +			ret = 0;
> +
> +		/* Do not change values if we don't have clock */
> +		if (ret != -ETIMEDOUT) {
> +			dw_phy_eq_default(dw_dev);
> +			phy_pddq(dw_dev, 1);
> +			phy_pddq(dw_dev, 0);
> +		}
> +	} else {
> +		dw_phy_eq_single(dw_dev);
> +		dw_phy_eq_equal_setting(dw_dev, 0x0001);
> +		phy_write(dw_dev, fat_bit_mask, PHY_CH0_EQ_CTRL6);
> +		phy_write(dw_dev, fat_bit_mask, PHY_CH1_EQ_CTRL6);
> +		phy_write(dw_dev, fat_bit_mask, PHY_CH2_EQ_CTRL6);
> +
> +		for (i = 0; i < PHY_EQ_MINMAX_NTRIES; i++) {
> +			if (dw_phy_eq_setting_finder(dw_dev, acq,
> +						&ch0, &ch1, &ch2)) {
> +				if (dw_phy_eq_maxvsmin(ch0.best_setting,
> +							ch1.best_setting,
> +							ch2.best_setting,
> +							min_max_length))
> +					break;
> +			}
> +
> +			ch0.best_setting = PHY_EQ_ERROR_CABLE_SETTING;
> +			ch1.best_setting = PHY_EQ_ERROR_CABLE_SETTING;
> +			ch2.best_setting = PHY_EQ_ERROR_CABLE_SETTING;
> +		}
> +
> +		dev_dbg(dw_dev->dev, "equalizer settings: "
> +				"ch0=0x%x, ch1=0x%x, ch1=0x%x\n",
> +				ch0.best_setting, ch1.best_setting,
> +				ch2.best_setting);
> +
> +		if (i == PHY_EQ_MINMAX_NTRIES)
> +			ret = -EINVAL;
> +
> +		lock_vector = 0x1;
> +		lock_vector <<= ch0.best_setting;
> +		dw_phy_eq_equal_setting_ch0(dw_dev, lock_vector);
> +
> +		lock_vector = 0x1;
> +		lock_vector <<= ch1.best_setting;
> +		dw_phy_eq_equal_setting_ch1(dw_dev, lock_vector);
> +
> +		lock_vector = 0x1;
> +		lock_vector <<= ch2.best_setting;
> +		dw_phy_eq_equal_setting_ch2(dw_dev, lock_vector);
> +
> +		phy_pddq(dw_dev, 1);
> +		phy_pddq(dw_dev, 0);
> +	}
> +
> +	return ret;
> +}
> +
> +static int dw_phy_config(struct dw_phy_dev *dw_dev, unsigned char color_depth,
> +		bool hdmi2, bool scrambling)
> +{
> +	const struct dw_phy_mpll_config *mpll_cfg = dw_phy_e405_mpll_cfg;
> +	struct device *dev = dw_dev->dev;
> +	int timeout = 100;
> +	u16 val, res_idx;
> +	bool zcal_done;
> +
> +	dev_dbg(dev, "%s: color_depth=%d, hdmi2=%d, scrambling=%d, cfg_clk=%d\n",
> +			__func__, color_depth, hdmi2, scrambling, dw_dev->cfg_clk);
> +
> +	switch (color_depth) {
> +	case 8:
> +		res_idx = 0x0;
> +		break;
> +	case 10:
> +		res_idx = 0x1;
> +		break;
> +	case 12:
> +		res_idx = 0x2;
> +		break;
> +	case 16:
> +		res_idx = 0x3;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	phy_reset(dw_dev, 1);
> +	phy_pddq(dw_dev, 1);
> +	phy_svsmode(dw_dev, 1);
> +
> +	phy_zcal_reset(dw_dev);
> +	do {
> +		usleep_range(1000, 1100);
> +		zcal_done = phy_zcal_done(dw_dev);
> +	} while (!zcal_done && timeout--);
> +
> +	if (!zcal_done) {
> +		dev_err(dw_dev->dev, "Zcal calibration failed\n");
> +		return -ETIMEDOUT;
> +	}
> +
> +	phy_reset(dw_dev, 0);
> +
> +	/* CMU */
> +	val = (0x08 << 10) | (0x01 << 9);
> +	val |= (dw_dev->cfg_clk * 4) & GENMASK(8, 0);
> +	phy_write(dw_dev, val, PHY_CMU_CONFIG);
> +
> +	/* Color Depth and enable fast switching */
> +	val = phy_read(dw_dev, PHY_SYSTEM_CONFIG);
> +	val = (val & ~0x60) | (res_idx << 5) | BIT(11);
> +	phy_write(dw_dev, val, PHY_SYSTEM_CONFIG);
> +
> +	/* MPLL */
> +	for (; mpll_cfg->addr != 0x0; mpll_cfg++)
> +		phy_write(dw_dev, mpll_cfg->val, mpll_cfg->addr);
> +
> +	/* Operation for data rates between 3.4Gbps and 6Gbps */
> +	val = phy_read(dw_dev, PHY_CDR_CTRL_CNT);
> +	if (hdmi2)
> +		val |= BIT(8);
> +	else
> +		val &= ~BIT(8);
> +	phy_write(dw_dev, val, PHY_CDR_CTRL_CNT);
> +
> +	/* Scrambling */
> +	val = phy_read(dw_dev, PHY_OVL_PROT_CTRL);
> +	if (scrambling)
> +		val |= GENMASK(7,6);
> +	else
> +		val &= ~GENMASK(7,6);
> +	phy_write(dw_dev, val, PHY_OVL_PROT_CTRL);
> +
> +	/* Enable phy */
> +	phy_pddq(dw_dev, 0);
> +
> +	dw_dev->color_depth = color_depth;
> +	dw_dev->hdmi2 = hdmi2;
> +	dw_dev->scrambling = scrambling;
> +	return 0;
> +}
> +
> +static int dw_phy_enable(struct dw_phy_dev *dw_dev, unsigned char color_depth,
> +		bool hdmi2, bool scrambling)
> +{
> +	int ret;
> +
> +	if (dw_dev->phy_enabled &&
> +	    dw_dev->color_depth == color_depth &&
> +	    dw_dev->hdmi2 == hdmi2 &&
> +	    dw_dev->scrambling == scrambling)
> +		return 0;
> +
> +	ret = dw_phy_config(dw_dev, color_depth, hdmi2, scrambling);
> +	if (ret)
> +		return ret;
> +
> +	phy_reset(dw_dev, 0);
> +	phy_pddq(dw_dev, 0);
> +	dw_dev->phy_enabled = true;
> +	return 0;
> +}
> +
> +static void dw_phy_disable(struct dw_phy_dev *dw_dev)
> +{
> +	if (!dw_dev->phy_enabled)
> +		return;
> +
> +	phy_reset(dw_dev, 1);
> +	phy_pddq(dw_dev, 1);
> +	phy_svsmode(dw_dev, 0);
> +	dw_dev->mpll_status = 0xFFFF;
> +	dw_dev->phy_enabled = false;
> +}
> +
> +static long dw_phy_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
> +{
> +	struct dw_phy_dev *dw_dev = to_dw_dev(sd);
> +	struct dw_phy_config_command *ccmd;
> +	struct dw_phy_eq_command *ecmd;
> +	int ret = 0;
> +
> +	dev_dbg(dw_dev->dev, "%s: cmd=%d\n", __func__, cmd);
> +
> +	mutex_lock(&dw_dev->lock);
> +	switch (cmd) {
> +	case DW_PHY_IOCTL_EQ_INIT:
> +		ecmd = (struct dw_phy_eq_command *)arg; 
> +		ecmd->result = dw_phy_eq_init(dw_dev, ecmd->nacq, ecmd->force);
> +		break;
> +	case DW_PHY_IOCTL_CONFIG:
> +		ccmd = (struct dw_phy_config_command *)arg;
> +		ccmd->result = dw_phy_enable(dw_dev, ccmd->color_depth,
> +				ccmd->hdmi2, ccmd->scrambling);
> +		break;
> +	default:
> +		ret = -ENOIOCTLCMD;
> +		break;
> +	}
> +	mutex_unlock(&dw_dev->lock);
> +
> +	return ret;
> +}
> +
> +static int dw_phy_s_power(struct v4l2_subdev *sd, int on)
> +{
> +	struct dw_phy_dev *dw_dev = to_dw_dev(sd);
> +
> +	dev_dbg(dw_dev->dev, "%s: on=%d\n", __func__, on);
> +
> +	mutex_lock(&dw_dev->lock);
> +	if (!on)
> +		dw_phy_disable(dw_dev);
> +	mutex_unlock(&dw_dev->lock);
> +	return 0;
> +}
> +
> +static const struct v4l2_subdev_core_ops dw_phy_core_ops = {
> +	.ioctl = dw_phy_ioctl,
> +	.s_power = dw_phy_s_power,
> +};
> +
> +static const struct v4l2_subdev_ops dw_phy_sd_ops = {
> +	.core = &dw_phy_core_ops,
> +};
> +
> +struct dw_hdmi_phy_data {
> +	const char *name;
> +	unsigned int version;
> +};
> +
> +static const struct dw_hdmi_phy_data dw_phy_e405_data = {
> +	.name = "e405",
> +	.version = 405,
> +};
> +
> +static int dw_phy_probe(struct platform_device *pdev)
> +{
> +	struct dw_phy_pdata *pdata = pdev->dev.platform_data;
> +	const struct dw_hdmi_phy_data *of_data;
> +	struct device *dev = &pdev->dev;
> +	struct dw_phy_dev *dw_dev;
> +	struct v4l2_subdev *sd;
> +	int ret;
> +
> +	dev_dbg(dev, "probe start\n");
> +
> +	dw_dev = devm_kzalloc(dev, sizeof(*dw_dev), GFP_KERNEL);
> +	if (!dw_dev)
> +		return -ENOMEM;
> +
> +	if (!pdata) {
> +		dev_err(dev, "no platform data suplied\n");
> +		return -EINVAL;
> +	}
> +
> +	of_data = of_device_get_match_data(dev);
> +	if (!of_data) {
> +		dev_err(dev, "no valid phy configuration available\n");
> +		return -EINVAL;
> +	}
> +
> +	dw_dev->dev = dev;
> +	dw_dev->config = pdata;
> +	dw_dev->version = of_data->version;
> +	mutex_init(&dw_dev->lock);
> +
> +	dw_dev->clk = devm_clk_get(dev, "cfg");
> +	if (IS_ERR(dw_dev->clk)) {
> +		dev_err(dev, "failed to get cfg clock\n");
> +		return PTR_ERR(dw_dev->clk);
> +	}
> +
> +	ret = clk_prepare_enable(dw_dev->clk);
> +	if (ret) {
> +		dev_err(dev, "failed to enable cfg clock\n");
> +		return ret;
> +	}
> +
> +	dw_dev->cfg_clk = clk_get_rate(dw_dev->clk) / 1000000U;
> +	if (!dw_dev->cfg_clk) {
> +		dev_err(dev, "invalid cfg clock frequency\n");
> +		ret = -EINVAL;
> +		goto err_clk;
> +	}
> +
> +	/* V4L2 initialization */
> +	sd = &dw_dev->sd;
> +	v4l2_subdev_init(sd, &dw_phy_sd_ops);
> +	strlcpy(sd->name, dev_name(dev), sizeof(sd->name));
> +	sd->dev = dev;
> +
> +	/* Force phy disabling */
> +	dw_dev->phy_enabled = true;
> +	dw_phy_disable(dw_dev);
> +
> +	ret = v4l2_async_register_subdev(sd);
> +	if (ret) {
> +		dev_err(dev, "failed to register subdev\n");
> +		goto err_clk;
> +	}
> +
> +	dev_set_drvdata(dev, sd);
> +	dev_dbg(dev, "driver probed (name=%s, cfg clock=%d)\n",
> +			of_data->name, dw_dev->cfg_clk);
> +	return 0;
> +
> +err_clk:
> +	clk_disable_unprepare(dw_dev->clk);
> +	return ret;
> +}
> +
> +static int dw_phy_remove(struct platform_device *pdev)
> +{
> +	struct v4l2_subdev *sd = dev_get_drvdata(&pdev->dev);
> +	struct dw_phy_dev *dw_dev = to_dw_dev(sd);
> +
> +	v4l2_async_unregister_subdev(sd);
> +	clk_disable_unprepare(dw_dev->clk);
> +	return 0;
> +}
> +
> +static const struct of_device_id dw_hdmi_phy_e405_id[] = {
> +	{ .compatible = "snps,dw-hdmi-phy-e405", .data = &dw_phy_e405_data, },
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(of, dw_hdmi_phy_e405_id);
> +
> +static struct platform_driver dw_phy_e405_driver = {
> +	.probe = dw_phy_probe,
> +	.remove = dw_phy_remove,
> +	.driver = {
> +		.name = DW_PHY_E405_DRVNAME,
> +		.of_match_table = dw_hdmi_phy_e405_id,
> +	}
> +};
> +module_platform_driver(dw_phy_e405_driver);
> diff --git a/drivers/media/platform/dwc/dw-hdmi-phy-e405.h b/drivers/media/platform/dwc/dw-hdmi-phy-e405.h
> new file mode 100644
> index 0000000..dcb71f0
> --- /dev/null
> +++ b/drivers/media/platform/dwc/dw-hdmi-phy-e405.h
> @@ -0,0 +1,41 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +// Copyright (c) 2017 Synopsys, Inc. and/or its affiliates.
> +// Synopsys DesignWare HDMI PHY e405 driver
> +
> +#ifndef __DW_HDMI_PHY_E405_H__
> +#define __DW_HDMI_PHY_E405_H__
> +
> +#define PHY_CMU_CONFIG				0x02
> +#define PHY_SYSTEM_CONFIG			0x03
> +#define PHY_MAINFSM_CTRL			0x05
> +#define PHY_MAINFSM_OVR2			0x08
> +#define PHY_MAINFSM_STATUS1			0x09
> +#define PHY_OVL_PROT_CTRL			0x0D
> +#define PHY_CDR_CTRL_CNT			0x0E
> +#define PHY_CLK_MPLL_STATUS			0x2F
> +#define PHY_CH0_EQ_CTRL1			0x32
> +#define PHY_CH0_EQ_CTRL2			0x33
> +#define PHY_CH0_EQ_STATUS			0x34
> +#define PHY_CH0_EQ_CTRL3			0x3E
> +#define PHY_CH0_EQ_CTRL4			0x3F
> +#define PHY_CH0_EQ_STATUS2			0x40
> +#define PHY_CH0_EQ_STATUS3			0x42
> +#define PHY_CH0_EQ_CTRL6			0x43
> +#define PHY_CH1_EQ_CTRL1			0x52
> +#define PHY_CH1_EQ_CTRL2			0x53
> +#define PHY_CH1_EQ_STATUS			0x54
> +#define PHY_CH1_EQ_CTRL3			0x5E
> +#define PHY_CH1_EQ_CTRL4			0x5F
> +#define PHY_CH1_EQ_STATUS2			0x60
> +#define PHY_CH1_EQ_STATUS3			0x62
> +#define PHY_CH1_EQ_CTRL6			0x63
> +#define PHY_CH2_EQ_CTRL1			0x72
> +#define PHY_CH2_EQ_CTRL2			0x73
> +#define PHY_CH2_EQ_STATUS			0x74
> +#define PHY_CH2_EQ_CTRL3			0x7E
> +#define PHY_CH2_EQ_CTRL4			0x7F
> +#define PHY_CH2_EQ_STATUS2			0x80
> +#define PHY_CH2_EQ_STATUS3			0x82
> +#define PHY_CH2_EQ_CTRL6			0x83
> +
> +#endif /* __DW_HDMI_PHY_E405_H__ */
> diff --git a/include/media/dwc/dw-hdmi-phy-pdata.h b/include/media/dwc/dw-hdmi-phy-pdata.h
> new file mode 100644
> index 0000000..04196ba
> --- /dev/null
> +++ b/include/media/dwc/dw-hdmi-phy-pdata.h
> @@ -0,0 +1,106 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +// Copyright (c) 2017 Synopsys, Inc. and/or its affiliates.
> +// Synopsys DesignWare HDMI PHY platform data
> +
> +#ifndef __DW_HDMI_PHY_PDATA_H__
> +#define __DW_HDMI_PHY_PDATA_H__
> +
> +#define DW_PHY_E405_DRVNAME	"dw-hdmi-phy-e405"
> +
> +#define DW_PHY_IOCTL_EQ_INIT		_IOW('R',1,int)
> +#define DW_PHY_IOCTL_CONFIG		_IOW('R',2,int)
> +
> +/**
> + * struct dw_phy_eq_command - Command arguments for HDMI PHY equalizer
> + * 	algorithm.
> + *
> + * @nacq: Number of acquisitions to get.
> + *
> + * @force: Force equalizer algorithm even if the MPLL status didn't change
> + * from previous run.
> + *
> + * @result: Result from the equalizer algorithm. Shall be zero if equalizer
> + * ran with success or didn't run because the video mode does not need
> + * equalizer (for low clock values).
> + */
> +struct dw_phy_eq_command {
> +	u16 nacq;
> +	bool force;
> +	int result;
> +};
> +
> +/**
> + * struct dw_phy_config_command - Command arguments for HDMI PHY configuration
> + * function.
> + *
> + * @color_depth: Color depth of the video mode being received.
> + *
> + * @hdmi2: Must be set to true if the video mode being received has a data
> + * rate above 3.4Gbps (generally HDMI 2.0 video modes, like 4k@60Hz).
> + *
> + * @scrambling: Must be set to true if scrambling is currently enabled.
> + * Scrambling is enabled by source when SCDC scrambling_en field is set to 1.
> + *
> + * @result: Result from the configuration function. Shall be zero if phy was
> + * configured with success.
> + */
> +struct dw_phy_config_command {
> +	unsigned char color_depth;
> +	bool hdmi2;
> +	bool scrambling;
> +	int result;
> +};
> +
> +/**
> + * struct dw_phy_funcs - Set of callbacks used to communicate between phy
> + * 	and hdmi controller. Controller must correctly fill these callbacks
> + * 	before probbing the phy driver.
> + *
> + * @write: write callback. Write value 'val' into address 'addr' of phy.
> + *
> + * @read: read callback. Read address 'addr' and return the value.
> + *
> + * @reset: reset callback. Activate phy reset. Active high.
> + *
> + * @pddq: pddq callback. Activate phy configuration mode. Active high.
> + *
> + * @svsmode: svsmode callback. Activate phy retention mode. Active low.
> + *
> + * @zcal_reset: zcal reset callback. Restart the impedance calibration
> + * procedure. Active high. This is only used in prototyping and not in real
> + * ASIC. Callback shall be empty (but non NULL) in ASIC cases.
> + *
> + * @zcal_done: zcal done callback. Return the current status of impedance
> + * calibration procedure. This is only used in prototyping and not in real
> + * ASIC. Shall return always true in ASIC cases.
> + *
> + * @tmds_valid: TMDS valid callback. Return the current status of TMDS signal
> + * that comes from phy and feeds controller. This is read from a controller
> + * register.
> + */
> +struct dw_phy_funcs {
> +	void (*write) (void *arg, u16 val, u16 addr);
> +	u16 (*read) (void *arg, u16 addr);
> +	void (*reset) (void *arg, int enable);
> +	void (*pddq) (void *arg, int enable);
> +	void (*svsmode) (void *arg, int enable);
> +	void (*zcal_reset) (void *arg);
> +	bool (*zcal_done) (void *arg);
> +	bool (*tmds_valid) (void *arg);
> +};
> +
> +/**
> + * struct dw_phy_pdata - Platform data definition for Synopsys HDMI PHY.
> + *
> + * @funcs: set of callbacks that must be correctly filled and supplied to phy.
> + * See @dw_phy_funcs.
> + *
> + * @funcs_arg: parameter that is supplied to callbacks along with the function
> + * parameters.
> + */
> +struct dw_phy_pdata {
> +	const struct dw_phy_funcs *funcs;
> +	void *funcs_arg;
> +};
> +
> +#endif /* __DW_HDMI_PHY_PDATA_H__ */
> 

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Hans Verkuil]

Hi Jose,

I have not seen any updates for this series. What is the status? I thought we
were close to merging this...

Regards,

	Hans

On 12/15/2017 12:23 PM, Jose Abreu wrote:
> Hi Hans,
> 
> On 13-12-2017 20:49, Hans Verkuil wrote:
>> On 13/12/17 15:00, Jose Abreu wrote:
>>>
>>> Indeed. I compared the values with the spec and they are not
>>> correct. Even hsync is wrong. I already corrected in the code the
>>> hsync but regarding interlace I'm not seeing an easy way to do
>>> this without using interrupts in each vsync because the register
>>> I was toggling does not behave as I expected (I misunderstood the
>>> databook). Maybe we should not detect interlaced modes for now?
>>> Or not fill the il_ fields?
>> As I mentioned above you as long as you get a good backporch value you
>> can deduce from whether it is an odd or even number to which field it
>> belongs and fill in the other values. So I think you only need to read
>> these values for one field.
>>
>> Filling in good values here (at least as far as is possible since not all
>> hardware can give it) will help debugging issues, even if you otherwise do
>> not support interlaced.
> 
> Ok, I will fill the fields.
> 
> Until the end of January I will be quite busy in another project
> so if you could review the remaining patches of this series I
> would appreciate very much ... This way when I have the time I
> can code all the changes and send them at once.
> 
> Thanks and Best Regards,
> Jose Miguel Abreu
> 
>>
>> Regards,
>>
>> 	Hans
> 
> 

Re: [PATCH v10 4/4] [media] platform: Add Synopsys DesignWare HDMI RX Controller Driver

[Jose Abreu]

Hi Hans,

On 08-06-2018 08:41, Hans Verkuil wrote:
> Hi Jose,
>
> I have not seen any updates for this series. What is the status? I thought we
> were close to merging this...

Good to hear from you! Hope you are doing fine! :)

A colleague of mine is working on this right now. We expect to
send a new series with some more features added.

Thanks and Best Regards,
Jose Miguel Abreu

>
> Regards,
>
> 	Hans
>
> On 12/15/2017 12:23 PM, Jose Abreu wrote:
>> Hi Hans,
>>
>> On 13-12-2017 20:49, Hans Verkuil wrote:
>>> On 13/12/17 15:00, Jose Abreu wrote:
>>>> Indeed. I compared the values with the spec and they are not
>>>> correct. Even hsync is wrong. I already corrected in the code the
>>>> hsync but regarding interlace I'm not seeing an easy way to do
>>>> this without using interrupts in each vsync because the register
>>>> I was toggling does not behave as I expected (I misunderstood the
>>>> databook). Maybe we should not detect interlaced modes for now?
>>>> Or not fill the il_ fields?
>>> As I mentioned above you as long as you get a good backporch value you
>>> can deduce from whether it is an odd or even number to which field it
>>> belongs and fill in the other values. So I think you only need to read
>>> these values for one field.
>>>
>>> Filling in good values here (at least as far as is possible since not all
>>> hardware can give it) will help debugging issues, even if you otherwise do
>>> not support interlaced.
>> Ok, I will fill the fields.
>>
>> Until the end of January I will be quite busy in another project
>> so if you could review the remaining patches of this series I
>> would appreciate very much ... This way when I have the time I
>> can code all the changes and send them at once.
>>
>> Thanks and Best Regards,
>> Jose Miguel Abreu
>>
>>> Regards,
>>>
>>> 	Hans
>>