Re: [PATCH v4 1/2] media: i2c: adv748x: add adv748x driver

From: Kieran Bingham
Date: Mon Jun 26 2017 - 11:15:08 EST

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Hi Hans,

Thankyou for your review, and apologies for the delay - I was OoO last week.

On 19/06/17 10:13, Hans Verkuil wrote:
> On 06/13/2017 02:35 AM, Kieran Bingham wrote:
>> From: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
>>
>> Provide support for the ADV7481 and ADV7482.
>>
>> The driver is modelled with 4 subdevices to allow simultaneous streaming
>> from the AFE (Analog front end) and HDMI inputs though two CSI TX
>> entities.
>>
>> The HDMI entity is linked to the TXA CSI bus, whilst the AFE is linked
>> to the TXB CSI bus.
>>
>> The driver is based on a prototype by Koji Matsuoka in the Renesas BSP,
>> and an earlier rework by Niklas SÃderlund.
>>
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
>>
>> ---
>>
>> v2:
>> - Implement DT parsing
>> - adv748x: Add CSI2 entity
>> - adv748x: Rework pad allocations and fmts
>> - Give AFE 8 input pads and move pad defines
>> - Use the enums to ensure pads are referenced correctly.
>> - adv748x: Rename AFE/HDMI entities
>> Now they are 'just afe' and 'just hdmi'
>> - Reorder the entity enum and structures
>> - Added pad-format for the CSI2 entities
>> - CSI2 s_stream pass through
>> - CSI2 control pass through (with link following)
>>
>> v3:
>> - dt: Extend DT documentation to specify interrupt mappings
>> - simplify adv748x_parse_dt
>> - core: Add banner to header file describing ADV748x variants
>> - Use entity structure pointers rather than global state pointers where
>> possible
>> - afe: Reduce indent on afe_status
>> - hdmi: Add error checking to the bt->pixelclock values.
>> - Remove all unnecessary pad checks: handled by core
>> - Fix all probe cleanup paths
>> - adv748x_csi2_probe() now fails if it has no endpoint
>> - csi2: Fix small oneliners for is_txa and get_remote_sd()
>> - csi2: Fix checkpatch warnings
>> - csi2: Fix up s_stream pass-through
>> - csi2: Fix up Pixel Rate passthrough
>> - csi2: simplify adv748x_csi2_get_pad_format()
>> - Remove 'async notifiers' from AFE/HDMI
>> Using async notifiers was overkill, when we have access to the
>> subdevices internally and can register them directly.
>> - Use state lock in control handlers and clean up s_ctrls
>> - remove _interruptible mutex locks
>>
>> v4:
>> - all: Convert hex 0xXX to lowercase
>> - all: Use defines instead of hardcoded register values
>> - all: Use regmap
>> - afe, csi2, hdmi: _probe -> _init
>> - afe, csi2, hdmi: _remove -> _cleanup
>> - afe, hdmi: Convert pattern generator to a control
>> - afe, hdmi: get/set-fmt refactor
>> - afe, hdmi, csi2: Convert to internal calls for pixelrate
>> - afe: Allow the AFE to configure the Input Select from DT
>> - afe: Reduce indent on adv748x_afe_status switch
>> - afe: Remove ununsed macro definitions AIN0-7
>> - afe: Remove extraneous control checks handled by core
>> - afe: Comment fixups
>> - afe: Rename error label
>> - afe: Correct control names on the SDP
>> - afe: Use AIN0-7 rather than AIN1-8 to match ports and MC pads
>> - core: adv748x_parse_dt references to nodes, and catch multiple
>> endpoints in a port.
>> - core: adv748x_dt_cleanup to simplify releasing DT nodes
>> - core: adv748x_print_info renamed to adv748x_identify_chip
>> - core: reorganise ordering of probe sequence
>> - core: No need for of_match_ptr
>> - core: Fix up i2c read/writes (regmap still on todo list)
>> - core: Set specific functions from the entities on subdev-init
>> - core: Use kzalloc for state instead of devm
>> - core: Improve probe error reporting
>> - core: Track unknown BIT(6) in tx{a,b}_power
>> - csi2: Improve adv748x_csi2_get_remote_sd as adv748x_csi2_get_source_sd
>> - csi2: -EPIPE instead of -ENODEV
>> - csi2: adv_dbg, instead of adv_info
>> - csi2: adv748x_csi2_set_format fix
>> - csi2: remove async notifier and sd member variables
>> - csi2: register links from the CSI2
>> - csi2: create virtual channel helper function
>> - dt: Remove numbering from endpoints
>> - dt: describe ports and interrupts as optional
>> - dt: Re-tab
>> - hdmi: adv748x_hdmi_have_signal -> adv748x_hdmi_has_signal
>> - hdmi: fix adv748x_hdmi_read_pixelclock return checks
>> - hdmi: improve adv748x_hdmi_set_video_timings
>> - hdmi: Fix tmp variable as polarity
>> - hdmi: Improve adv748x_hdmi_s_stream
>> - hdmi: Clean up adv748x_hdmi_s_ctrl register definitions and usage
>> - hdmi: Fix up adv748x_hdmi_s_dv_timings with macro names for register
>> - hdmi: Add locking to adv748x_hdmi_g_dv_timings
>> writes and locking
>> - hdmi: adv748x_hdmi_set_de_timings function added to clarify DE writes
>> - hdmi: Use CP in control register naming to match component processor
>> - hdmi: clean up adv748x_hdmi_query_dv_timings()
>> - KConfig: Fix up dependency and capitalisation
>>
>>
>> Documentation/devicetree/bindings/media/i2c/adv748x.txt | 96 +-
>
> This should be a separate patch cross posted to the devicetree mailinglist.
>
>> MAINTAINERS | 6 +-
>
> This should also be a separate patch.
>
>> drivers/media/i2c/Kconfig | 11 +-
>> drivers/media/i2c/Makefile | 1 +-
>> drivers/media/i2c/adv748x/Makefile | 7 +-
>> drivers/media/i2c/adv748x/adv748x-afe.c | 571 ++++++-
>> drivers/media/i2c/adv748x/adv748x-core.c | 907 +++++++++-
>> drivers/media/i2c/adv748x/adv748x-csi2.c | 323 +++-
>> drivers/media/i2c/adv748x/adv748x-hdmi.c | 652 ++++++-
>> drivers/media/i2c/adv748x/adv748x.h | 415 ++++-
>> 10 files changed, 2989 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/media/i2c/adv748x.txt
>> create mode 100644 drivers/media/i2c/adv748x/Makefile
>> create mode 100644 drivers/media/i2c/adv748x/adv748x-afe.c
>> create mode 100644 drivers/media/i2c/adv748x/adv748x-core.c
>> create mode 100644 drivers/media/i2c/adv748x/adv748x-csi2.c
>> create mode 100644 drivers/media/i2c/adv748x/adv748x-hdmi.c
>> create mode 100644 drivers/media/i2c/adv748x/adv748x.h
>>
>> diff --git a/Documentation/devicetree/bindings/media/i2c/adv748x.txt
>> b/Documentation/devicetree/bindings/media/i2c/adv748x.txt
>> new file mode 100644
>> index 000000000000..b17f8983c992
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/i2c/adv748x.txt
>> @@ -0,0 +1,96 @@
>> +* Analog Devices ADV748X video decoder with HDMI receiver
>> + > +The ADV7481, and ADV7482 are multi format video decoders with an integrated
>
> No comma needed.

Fixed,

>
>> +HDMI receiver. They can output CSI-2 on two independent outputs TXA and TXB
>> +from three input sources HDMI, analog and TTL.
>> +
>> +Required Properties:
>> +
>> + - compatible: Must contain one of the following
>> + - "adi,adv7481" for the ADV7481
>> + - "adi,adv7482" for the ADV7482
>> +
>> + - reg: I2C slave address
>> +
>> +Optional Properties:
>> +
>> + - interrupt-names: Should specify the interrupts as "intrq1", "intrq2" and/or
>> + "intrq3". All interrupts are optional. The "intrq3" interrupt
>> + is only available on the adv7481
>> + - interrupts: Specify the interrupt lines for the ADV748x
>> +
>> +The device node must contain one 'port' child node per device input and output
>> +port, in accordance with the video interface bindings defined in
>> +Documentation/devicetree/bindings/media/video-interfaces.txt. The port nodes
>> +are numbered as follows.
>> +
>> + Name Type Port
>> + ---------------------------------------
>> + AIN0 sink 0
>> + AIN1 sink 1
>> + AIN2 sink 2
>> + AIN3 sink 3
>> + AIN4 sink 4
>> + AIN5 sink 5
>> + AIN6 sink 6
>> + AIN7 sink 7
>> + HDMI sink 8
>> + TTL sink 9
>> + TXA source 10
>> + TXB source 11
>> +
>> +The digital output port nodes must contain at least one endpoint.
>> +
>> +Ports are optional if they are not connected to anything at the hardware level,
>> +but the driver may not provide any support for ports which are not described.
>
> Not sure what is meant by 'but the driver may not provide any support for ports
> which are not described'. Isn't that expected behavior if you leave out the port?

Removed

>
>> +
>> +Example:
>> +
>> + video_receiver@70 {
>> + compatible = "adi,adv7482";
>> + reg = <0x70>;
>> +
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + interrupt-parent = <&gpio6>;
>> + interrupt-names = "intrq1", "intrq2";
>> + interrupts = <30 IRQ_TYPE_LEVEL_LOW>,
>> + <31 IRQ_TYPE_LEVEL_LOW>;
>> +
>> + port@7 {
>> + reg = <7>;
>> +
>> + adv7482_ain7: endpoint {
>> + remote-endpoint = <&cvbs_in>;
>> + };
>> + };
>> +
>> + port@8 {
>> + reg = <8>;
>> +
>> + adv7482_hdmi: endpoint {
>> + remote-endpoint = <&hdmi_in>;
>> + };
>> + };
>> +
>> + port@10 {
>> + reg = <10>;
>> +
>> + adv7482_txa: endpoint {
>> + clock-lanes = <0>;
>> + data-lanes = <1 2 3 4>;
>> + remote-endpoint = <&csi40_in>;
>> + };
>> + };
>> +
>> + port@11 {
>> + reg = <11>;
>> +
>> + adv7482_txb: endpoint {
>> + clock-lanes = <0>;
>> + data-lanes = <1>;
>> + remote-endpoint = <&csi20_in>;
>> + };
>> + };
>> + };
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index eaaa35419fa2..7e2b65240a6f 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -776,6 +776,12 @@ L: linux-media@xxxxxxxxxxxxxxx
>> S: Maintained
>> F: drivers/media/i2c/adv7511*
>> +ANALOG DEVICES INC ADV748X DRIVER
>> +M: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
>> +L: linux-media@xxxxxxxxxxxxxxx
>> +S: Maintained
>> +F: drivers/media/i2c/adv748x/*
>> +
>> ANALOG DEVICES INC ADV7604 DRIVER
>> M: Hans Verkuil <hans.verkuil@xxxxxxxxx>
>> L: linux-media@xxxxxxxxxxxxxxx
>> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
>> index 7c23b7a1fd05..fcbec4273fef 100644
>> --- a/drivers/media/i2c/Kconfig
>> +++ b/drivers/media/i2c/Kconfig
>> @@ -204,6 +204,17 @@ config VIDEO_ADV7183
>> To compile this driver as a module, choose M here: the
>> module will be called adv7183.
>> +config VIDEO_ADV748X
>> + tristate "Analog Devices ADV748x decoder"
>> + depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
>> + depends on OF
>> + ---help---
>> + V4L2 subdevice driver for the Analog Devices
>> + ADV7481 and ADV7482 HDMI/Analog video decoders.
>> +
>> + To compile this driver as a module, choose M here: the
>> + module will be called adv748x.
>> +
>> config VIDEO_ADV7604
>> tristate "Analog Devices ADV7604 decoder"
>> depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
>> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
>> index 62323ec66be8..e0e6045a2ec8 100644
>> --- a/drivers/media/i2c/Makefile
>> +++ b/drivers/media/i2c/Makefile
>> @@ -27,6 +27,7 @@ obj-$(CONFIG_VIDEO_ADV7180) += adv7180.o
>> obj-$(CONFIG_VIDEO_ADV7183) += adv7183.o
>> obj-$(CONFIG_VIDEO_ADV7343) += adv7343.o
>> obj-$(CONFIG_VIDEO_ADV7393) += adv7393.o
>> +obj-$(CONFIG_VIDEO_ADV748X) += adv748x/
>> obj-$(CONFIG_VIDEO_ADV7604) += adv7604.o
>> obj-$(CONFIG_VIDEO_ADV7842) += adv7842.o
>> obj-$(CONFIG_VIDEO_AD9389B) += ad9389b.o
>> diff --git a/drivers/media/i2c/adv748x/Makefile
>> b/drivers/media/i2c/adv748x/Makefile
>> new file mode 100644
>> index 000000000000..c0711e076f1d
>> --- /dev/null
>> +++ b/drivers/media/i2c/adv748x/Makefile
>> @@ -0,0 +1,7 @@
>> +adv748x-objs := \
>> + adv748x-afe.o \
>> + adv748x-core.o \
>> + adv748x-csi2.o \
>> + adv748x-hdmi.o
>> +
>> +obj-$(CONFIG_VIDEO_ADV748X) += adv748x.o
>> diff --git a/drivers/media/i2c/adv748x/adv748x-afe.c
>> b/drivers/media/i2c/adv748x/adv748x-afe.c
>> new file mode 100644
>> index 000000000000..28e95b292d9b
>> --- /dev/null
>> +++ b/drivers/media/i2c/adv748x/adv748x-afe.c
>> @@ -0,0 +1,571 @@
>> +/*
>> + * Driver for Analog Devices ADV748X 8 channel analog front end (AFE) receiver
>> + * with standard definition processor (SDP)
>> + *
>> + * Copyright (C) 2017 Renesas Electronics Corp.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms of the GNU General Public License as published by the
>> + * Free Software Foundation; either version 2 of the License, or (at your
>> + * option) any later version.
>> + */
>> +
>> +#include <linux/delay.h>
>> +#include <linux/module.h>
>> +#include <linux/mutex.h>
>> +#include <linux/v4l2-dv-timings.h>
>> +
>> +#include <media/v4l2-ctrls.h>
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-dv-timings.h>
>> +#include <media/v4l2-ioctl.h>
>> +
>> +#include "adv748x.h"
>> +
>> +/* -----------------------------------------------------------------------------
>> + * SDP
>> + */
>> +
>> +#define ADV748X_AFE_STD_AD_PAL_BG_NTSC_J_SECAM 0x0
>> +#define ADV748X_AFE_STD_AD_PAL_BG_NTSC_J_SECAM_PED 0x1
>> +#define ADV748X_AFE_STD_AD_PAL_N_NTSC_J_SECAM 0x2
>> +#define ADV748X_AFE_STD_AD_PAL_N_NTSC_M_SECAM 0x3
>> +#define ADV748X_AFE_STD_NTSC_J 0x4
>> +#define ADV748X_AFE_STD_NTSC_M 0x5
>> +#define ADV748X_AFE_STD_PAL60 0x6
>> +#define ADV748X_AFE_STD_NTSC_443 0x7
>> +#define ADV748X_AFE_STD_PAL_BG 0x8
>> +#define ADV748X_AFE_STD_PAL_N 0x9
>> +#define ADV748X_AFE_STD_PAL_M 0xa
>> +#define ADV748X_AFE_STD_PAL_M_PED 0xb
>> +#define ADV748X_AFE_STD_PAL_COMB_N 0xc
>> +#define ADV748X_AFE_STD_PAL_COMB_N_PED 0xd
>> +#define ADV748X_AFE_STD_PAL_SECAM 0xe
>> +#define ADV748X_AFE_STD_PAL_SECAM_PED 0xf
>> +
>> +static int adv748x_afe_read_ro_map(struct adv748x_state *state, u8 reg)
>> +{
>> + int ret;
>> +
>> + /* Select SDP Read-Only Main Map */
>> + ret = sdp_write(state, ADV748X_SDP_MAP_SEL,
>> + ADV748X_SDP_MAP_SEL_RO_MAIN);
>> + if (ret < 0)
>> + return ret;
>> +
>> + return sdp_read(state, reg);
>> +}
>> +
>> +static int adv748x_afe_status(struct adv748x_afe *afe, u32 *signal,
>> + v4l2_std_id *std)
>> +{
>> + struct adv748x_state *state = adv748x_afe_to_state(afe);
>> + int info;
>> +
>> + /* Read status from reg 0x10 of SDP RO Map */
>> + info = adv748x_afe_read_ro_map(state, ADV748X_SDP_RO_10);
>> + if (info < 0)
>> + return info;
>> +
>> + if (signal)
>> + *signal = info & ADV748X_SDP_RO_10_IN_LOCK ?
>> + 0 : V4L2_IN_ST_NO_SIGNAL;
>> +
>> + if (!std)
>> + return 0;
>> +
>> + /* Standard not valid if there is no signal */
>> + if (info & BIT(0)) {
>> + *std = V4L2_STD_UNKNOWN;
>> + return 0;
>> + }
>> +
>> + switch (info & 0x70) {
>> + case 0x00:
>> + *std = V4L2_STD_NTSC;
>> + break;
>> + case 0x10:
>> + *std = V4L2_STD_NTSC_443;
>> + break;
>> + case 0x20:
>> + *std = V4L2_STD_PAL_M;
>> + break;
>> + case 0x30:
>> + *std = V4L2_STD_PAL_60;
>> + break;
>> + case 0x40:
>> + *std = V4L2_STD_PAL;
>> + break;
>> + case 0x50:
>> + *std = V4L2_STD_SECAM;
>> + break;
>> + case 0x60:
>> + *std = V4L2_STD_PAL_Nc | V4L2_STD_PAL_N;
>> + break;
>> + case 0x70:
>> + *std = V4L2_STD_SECAM;
>> + break;
>> + default:
>> + *std = V4L2_STD_UNKNOWN;
>> + break;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static void adv748x_afe_fill_format(struct adv748x_afe *afe,
>> + struct v4l2_mbus_framefmt *fmt)
>> +{
>> + v4l2_std_id std;
>> +
>> + memset(fmt, 0, sizeof(*fmt));
>> +
>> + fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
>> + fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
>> + fmt->field = V4L2_FIELD_INTERLACED;
>> +
>> + fmt->width = 720;
>> +
>> + if (afe->curr_norm == V4L2_STD_ALL)
>> + adv748x_afe_status(afe, NULL, &std);
>> + else
>> + std = afe->curr_norm;
>> +
>> + fmt->height = std & V4L2_STD_525_60 ? 480 : 576;
>> +}
>> +
>> +static int adv748x_afe_std(v4l2_std_id std)
>> +{
>> + if (std == V4L2_STD_ALL)
>> + return ADV748X_AFE_STD_AD_PAL_BG_NTSC_J_SECAM;
>> + if (std == V4L2_STD_PAL_60)
>> + return ADV748X_AFE_STD_PAL60;
>> + if (std == V4L2_STD_NTSC_443)
>> + return ADV748X_AFE_STD_NTSC_443;
>> + if (std == V4L2_STD_PAL_N)
>> + return ADV748X_AFE_STD_PAL_N;
>> + if (std == V4L2_STD_PAL_M)
>> + return ADV748X_AFE_STD_PAL_M;
>> + if (std == V4L2_STD_PAL_Nc)
>> + return ADV748X_AFE_STD_PAL_COMB_N;
>> + if (std & V4L2_STD_PAL)
>> + return ADV748X_AFE_STD_PAL_BG;
>> + if (std & V4L2_STD_NTSC)
>> + return ADV748X_AFE_STD_NTSC_M;
>
> This NTSC test should come before the PAL test. This is the order other drivers
> do this as well. So a standard with a mix of NTSC and PAL bits will map to NTSC.

OK Updated.

>
>> + if (std & V4L2_STD_SECAM)
>> + return ADV748X_AFE_STD_PAL_SECAM;
>> +
>> + return -EINVAL;
>> +}
>> +
>> +static int adv748x_afe_set_video_standard(struct adv748x_state *state,
>> + v4l2_std_id std)
>> +{
>> + int sdpstd;
>> +
>> + sdpstd = adv748x_afe_std(std);
>> + if (sdpstd < 0)
>> + return sdpstd;
>> +
>> + sdp_clrset(state, ADV748X_SDP_VID_SEL, ADV748X_SDP_VID_SEL_MASK,
>> + (sdpstd & 0xf) << ADV748X_SDP_VID_SEL_SHIFT);
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_afe_s_input(struct adv748x_afe *afe, unsigned int input)
>> +{
>> + struct adv748x_state *state = adv748x_afe_to_state(afe);
>> +
>> + return sdp_write(state, ADV748X_SDP_INSEL, input);
>> +}
>> +
>> +static int adv748x_afe_g_pixelaspect(struct v4l2_subdev *sd,
>> + struct v4l2_fract *aspect)
>> +{
>> + struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
>> + v4l2_std_id std;
>> +
>> + if (afe->curr_norm == V4L2_STD_ALL)
>> + adv748x_afe_status(afe, NULL, &std);
>> + else
>> + std = afe->curr_norm;
>> +
>> + if (std & V4L2_STD_525_60) {
>> + aspect->numerator = 11;
>> + aspect->denominator = 10;
>> + } else {
>> + aspect->numerator = 54;
>> + aspect->denominator = 59;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_video_ops
>> + */
>> +
>> +static int adv748x_afe_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm)
>> +{
>> + struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
>> +
>> + if (afe->curr_norm == V4L2_STD_ALL)
>> + adv748x_afe_status(afe, NULL, norm);
>> + else
>> + *norm = afe->curr_norm;
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_afe_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
>> +{
>> + struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
>> + struct adv748x_state *state = adv748x_afe_to_state(afe);
>> + int ret;
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + ret = adv748x_afe_set_video_standard(state, std);
>> + if (ret == 0)
>> + afe->curr_norm = std;
>
> OK, so this is a bit of a problem: you are using V4L2_STD_ALL as an autodetect
> mechanism, but that is not allowed by the V4L2 specification. Yes, some old
> drivers do this and we don't dare to change that, but new drivers should not
> attempt this. The standard set and reported by s_std and g_std must always
> be precise, i.e. no mix of NTSC and PAL.
>
> Only QUERYSTD is allowed to detect the format.

So how about using V4L2_STD_UNKNOWN as the hint to autodetect and initialising
to NTSC as you suggest in probe.

g_std will then always return either the initial value, a detected value, or
unknown if no lock is available.

Although then, I'd almost prefer to initialise to V4L2_STD_UNKNOWN ...

>
> So
>
>> +
>> + mutex_unlock(&state->mutex);
>> +
>> + return ret;
>> +}
>> +
>> +static int adv748x_afe_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
>> +{
>> + struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
>> + struct adv748x_state *state = adv748x_afe_to_state(afe);
>> + int ret;
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + if (afe->streaming) {
>> + ret = -EBUSY;
>> + goto unlock;
>> + }
>> +
>> + /* Set auto detect mode */
>> + ret = adv748x_afe_set_video_standard(state, V4L2_STD_ALL);

I.e. - I'll set V4L2_STD_UNKNOWN here ...

>> + if (ret)
>> + goto unlock;
>> +
>> + msleep(100);
>> +
>> + /* Read detected standard */
>> + ret = adv748x_afe_status(afe, NULL, std);
>> +unlock:
>> + mutex_unlock(&state->mutex);
>> +
>> + return ret;
>> +}
>> +
>> +static int adv748x_afe_g_tvnorms(struct v4l2_subdev *sd, v4l2_std_id *norm)
>> +{
>> + *norm = V4L2_STD_ALL;
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_afe_g_input_status(struct v4l2_subdev *sd, u32 *status)
>> +{
>> + struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
>> + struct adv748x_state *state = adv748x_afe_to_state(afe);
>> + int ret;
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + ret = adv748x_afe_status(afe, status, NULL);
>> +
>> + mutex_unlock(&state->mutex);
>> + return ret;
>> +}
>> +
>> +static int adv748x_afe_s_stream(struct v4l2_subdev *sd, int enable)
>> +{
>> + struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
>> + struct adv748x_state *state = adv748x_afe_to_state(afe);
>> + int ret, signal = V4L2_IN_ST_NO_SIGNAL;
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + if (enable) {
>> + ret = adv748x_afe_s_input(afe, afe->input);
>> + if (ret)
>> + goto unlock;
>> + }
>> +
>> + ret = adv748x_txb_power(state, enable);
>> + if (ret)
>> + goto unlock;
>> +
>> + afe->streaming = enable;
>> +
>> + adv748x_afe_status(afe, &signal, NULL);
>> + if (signal != V4L2_IN_ST_NO_SIGNAL)
>> + adv_dbg(state, "Detected SDP signal\n");
>> + else
>> + adv_dbg(state, "Couldn't detect SDP video signal\n");
>> +
>> +unlock:
>> + mutex_unlock(&state->mutex);
>> +
>> + return ret;
>> +}
>> +
>> +static const struct v4l2_subdev_video_ops adv748x_afe_video_ops = {
>> + .g_std = adv748x_afe_g_std,
>> + .s_std = adv748x_afe_s_std,
>> + .querystd = adv748x_afe_querystd,
>> + .g_tvnorms = adv748x_afe_g_tvnorms,
>> + .g_input_status = adv748x_afe_g_input_status,
>> + .s_stream = adv748x_afe_s_stream,
>> + .g_pixelaspect = adv748x_afe_g_pixelaspect,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_pad_ops
>> + */
>> +
>> +static int adv748x_afe_set_pixelrate(struct adv748x_afe *afe)
>> +{
>> + struct v4l2_subdev *tx;
>> + unsigned int width, height, fps;
>> +
>> + tx = adv748x_get_remote_sd(&afe->pads[ADV748X_AFE_SOURCE]);
>> + if (!tx)
>> + return -ENOLINK;
>> +
>> + width = 720;
>> + height = afe->curr_norm & V4L2_STD_525_60 ? 480 : 576;
>> + fps = afe->curr_norm & V4L2_STD_525_60 ? 30 : 25;
>> +
>> + return adv748x_csi2_set_pixelrate(tx, width * height * fps);
>> +}
>> +
>> +static int adv748x_afe_enum_mbus_code(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_mbus_code_enum *code)
>> +{
>> + if (code->index != 0)
>> + return -EINVAL;
>> +
>> + code->code = MEDIA_BUS_FMT_UYVY8_2X8;
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_afe_get_format(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_format *sdformat)
>> +{
>> + struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
>> + struct v4l2_mbus_framefmt *mbusformat;
>> +
>> + /* The format of the analog sink pads is nonsensical */
>
> You mean: /* It makes no sense to get the format of analog sink pads */
>
> I misread your comment as meaning that the *format* made no sense.

Re-written as you suggested.

>
>> + if (sdformat->pad != ADV748X_AFE_SOURCE)
>> + return -EINVAL;
>> +
>> + if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY) {
>> + mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
>> + sdformat->format = *mbusformat;
>> + } else {
>> + adv748x_afe_fill_format(afe, &sdformat->format);
>> + adv748x_afe_set_pixelrate(afe);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_afe_set_format(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_format *sdformat)
>> +{
>> + struct v4l2_mbus_framefmt *mbusformat;
>> +
>> + /* The format of the analog sink pads is nonsensical */
>
> Ditto.

Ditto.

>
>> + if (sdformat->pad != ADV748X_AFE_SOURCE)
>> + return -EINVAL;
>> +
>> + if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
>> + return adv748x_afe_get_format(sd, cfg, sdformat);
>> +
>> + mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
>> + *mbusformat = sdformat->format;
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_subdev_pad_ops adv748x_afe_pad_ops = {
>> + .enum_mbus_code = adv748x_afe_enum_mbus_code,
>> + .set_fmt = adv748x_afe_set_format,
>> + .get_fmt = adv748x_afe_get_format,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_ops
>> + */
>> +
>> +static const struct v4l2_subdev_ops adv748x_afe_ops = {
>> + .video = &adv748x_afe_video_ops,
>> + .pad = &adv748x_afe_pad_ops,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Controls
>> + */
>> +
>> +static const char * const afe_ctrl_frp_menu[] = {
>> + "Disabled",
>> + "Default Value",
>
> What does this mean? It is not very descriptive.

It means output a value which is configured by the default value register.
So it's a programmable value, but I have not provided a way to set the colour.

I've just taken the string literals from the datasheet...

>
>> + "Color Bars",
>> + "Grey Ramp",
>> + "Cb Ramp",
>> + "Cr Ramp",
>> + "Boundary"
>> +};
>> +
>> +static int adv748x_afe_s_ctrl(struct v4l2_ctrl *ctrl)
>> +{
>> + struct adv748x_afe *afe = adv748x_ctrl_to_afe(ctrl);
>> + struct adv748x_state *state = adv748x_afe_to_state(afe);
>> + bool enable;
>> + int ret;
>> +
>> + ret = sdp_write(state, 0x0e, 0x00);
>> + if (ret < 0)
>> + return ret;
>> +
>> + switch (ctrl->id) {
>> + case V4L2_CID_BRIGHTNESS:
>> + ret = sdp_write(state, ADV748X_SDP_BRI, ctrl->val);
>> + break;
>> + case V4L2_CID_HUE:
>> + /* Hue is inverted according to HSL chart */
>> + ret = sdp_write(state, ADV748X_SDP_HUE, -ctrl->val);
>> + break;
>> + case V4L2_CID_CONTRAST:
>> + ret = sdp_write(state, ADV748X_SDP_CON, ctrl->val);
>> + break;
>> + case V4L2_CID_SATURATION:
>> + ret = sdp_write(state, ADV748X_SDP_SD_SAT_U, ctrl->val);
>> + if (ret)
>> + break;
>> + ret = sdp_write(state, ADV748X_SDP_SD_SAT_V, ctrl->val);
>> + break;
>> + case V4L2_CID_TEST_PATTERN:
>> + enable = !!ctrl->val;
>> +
>> + /* Enable/Disable Color bar test patterns */
>> + ret = sdp_clrset(state, ADV748X_SDP_DEF, ADV748X_SDP_DEF_VAL_EN,
>> + enable);
>> + if (ret)
>> + break;
>> + ret = sdp_clrset(state, ADV748X_SDP_FRP, ADV748X_SDP_FRP_MASK,
>> + enable ? ctrl->val - 1 : 0);
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static const struct v4l2_ctrl_ops adv748x_afe_ctrl_ops = {
>> + .s_ctrl = adv748x_afe_s_ctrl,
>> +};
>> +
>> +static int adv748x_afe_init_controls(struct adv748x_afe *afe)
>> +{
>> + struct adv748x_state *state = adv748x_afe_to_state(afe);
>> +
>> + v4l2_ctrl_handler_init(&afe->ctrl_hdl, 5);
>> +
>> + /* Use our mutex for the controls */
>> + afe->ctrl_hdl.lock = &state->mutex;
>> +
>> + v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
>> + V4L2_CID_BRIGHTNESS, ADV748X_SDP_BRI_MIN,
>> + ADV748X_SDP_BRI_MAX, 1, ADV748X_SDP_BRI_DEF);
>> + v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
>> + V4L2_CID_CONTRAST, ADV748X_SDP_CON_MIN,
>> + ADV748X_SDP_CON_MAX, 1, ADV748X_SDP_CON_DEF);
>> + v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
>> + V4L2_CID_SATURATION, ADV748X_SDP_SAT_MIN,
>> + ADV748X_SDP_SAT_MAX, 1, ADV748X_SDP_SAT_DEF);
>> + v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
>> + V4L2_CID_HUE, ADV748X_SDP_HUE_MIN,
>> + ADV748X_SDP_HUE_MAX, 1, ADV748X_SDP_HUE_DEF);
>> +
>> + v4l2_ctrl_new_std_menu_items(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
>> + V4L2_CID_TEST_PATTERN,
>> + ARRAY_SIZE(afe_ctrl_frp_menu) - 1,
>> + 0, 0, afe_ctrl_frp_menu);
>> +
>> + afe->sd.ctrl_handler = &afe->ctrl_hdl;
>> + if (afe->ctrl_hdl.error) {
>> + v4l2_ctrl_handler_free(&afe->ctrl_hdl);
>> + return afe->ctrl_hdl.error;
>> + }
>> +
>> + return v4l2_ctrl_handler_setup(&afe->ctrl_hdl);
>> +}
>> +
>> +int adv748x_afe_init(struct adv748x_afe *afe)
>> +{
>> + struct adv748x_state *state = adv748x_afe_to_state(afe);
>> + int ret;
>> + unsigned int i;
>> +
>> + afe->input = 0;
>> + afe->streaming = false;
>> + afe->curr_norm = V4L2_STD_ALL;
>
> No. This must be a valid standard. Typically V4L2_STD_NTSC_M.

Wouldn't V4L2_STD_UNKNOWN be more reasonable at this stage?

>> +
>> + adv748x_subdev_init(&afe->sd, state, &adv748x_afe_ops,
>> + MEDIA_ENT_F_ATV_DECODER, "afe");
>> +
>> + /* Identify the first connector found as a default input if set */
>> + for (i = ADV748X_PORT_AIN0; i <= ADV748X_PORT_AIN7; i++) {
>> + /* Inputs and ports are 1-indexed to match the data sheet */
>> + if (state->endpoints[i]) {
>> + afe->input = i;
>> + break;
>> + }
>> + }
>> +
>> + adv748x_afe_s_input(afe, afe->input);
>> +
>> + adv_dbg(state, "AFE Default input set to %d\n", afe->input);
>> +
>> + /* Entity pads and sinks are 0-indexed to match the pads */
>> + for (i = ADV748X_AFE_SINK_AIN0; i <= ADV748X_AFE_SINK_AIN7; i++)
>> + afe->pads[i].flags = MEDIA_PAD_FL_SINK;
>> +
>> + afe->pads[ADV748X_AFE_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
>> +
>> + ret = media_entity_pads_init(&afe->sd.entity, ADV748X_AFE_NR_PADS,
>> + afe->pads);
>> + if (ret)
>> + return ret;
>> +
>> + ret = adv748x_afe_init_controls(afe);
>> + if (ret)
>> + goto error;
>> +
>> + return 0;
>> +
>> +error:
>> + media_entity_cleanup(&afe->sd.entity);
>> +
>> + return ret;
>> +}
>> +
>> +void adv748x_afe_cleanup(struct adv748x_afe *afe)
>> +{
>> + v4l2_device_unregister_subdev(&afe->sd);
>> + media_entity_cleanup(&afe->sd.entity);
>> + v4l2_ctrl_handler_free(&afe->ctrl_hdl);
>> +}
>> diff --git a/drivers/media/i2c/adv748x/adv748x-core.c
>> b/drivers/media/i2c/adv748x/adv748x-core.c
>> new file mode 100644
>> index 000000000000..6e395a4524ec
>> --- /dev/null
>> +++ b/drivers/media/i2c/adv748x/adv748x-core.c
>> @@ -0,0 +1,907 @@
>> +/*
>> + * Driver for Analog Devices ADV748X HDMI receiver with AFE
>> + *
>> + * Copyright (C) 2017 Renesas Electronics Corp.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms of the GNU General Public License as published by the
>> + * Free Software Foundation; either version 2 of the License, or (at your
>> + * option) any later version.
>> + *
>> + * Authors:
>> + * Koji Matsuoka <koji.matsuoka.xm@xxxxxxxxxxx>
>> + * Niklas SÃderlund <niklas.soderlund@xxxxxxxxxxxx>
>> + * Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
>> + */
>> +
>> +#include <linux/delay.h>
>> +#include <linux/errno.h>
>> +#include <linux/i2c.h>
>> +#include <linux/module.h>
>> +#include <linux/mutex.h>
>> +#include <linux/of_graph.h>
>> +#include <linux/regmap.h>
>> +#include <linux/v4l2-dv-timings.h>
>> +
>> +#include <media/v4l2-ctrls.h>
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-dv-timings.h>
>> +#include <media/v4l2-ioctl.h>
>> +
>> +#include "adv748x.h"
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Register manipulation
>> + */
>> +
>> +static const struct regmap_config adv748x_regmap_cnf[] = {
>> + {
>> + .name = "io",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> + {
>> + .name = "dpll",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> + {
>> + .name = "cp",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> + {
>> + .name = "hdmi",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> + {
>> + .name = "edid",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> + {
>> + .name = "repeater",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> + {
>> + .name = "infoframe",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> + {
>> + .name = "cec",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> + {
>> + .name = "sdp",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> +
>> + {
>> + .name = "txb",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> + {
>> + .name = "txa",
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = 0xff,
>> + .cache_type = REGCACHE_NONE,
>> + },
>> +};
>> +
>> +static int adv748x_configure_regmap(struct adv748x_state *state, int region)
>> +{
>> + int err;
>> +
>> + if (!state->i2c_clients[region])
>> + return -ENODEV;
>> +
>> + state->regmap[region] =
>> + devm_regmap_init_i2c(state->i2c_clients[region],
>> + &adv748x_regmap_cnf[region]);
>> +
>> + if (IS_ERR(state->regmap[region])) {
>> + err = PTR_ERR(state->regmap[region]);
>> + adv_err(state,
>> + "Error initializing regmap %d with error %d\n",
>> + region, err);
>> + return -EINVAL;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/* Default addresses for the I2C pages */
>> +static int adv748x_i2c_addresses[ADV748X_PAGE_MAX] = {
>> + ADV748X_I2C_IO,
>> + ADV748X_I2C_DPLL,
>> + ADV748X_I2C_CP,
>> + ADV748X_I2C_HDMI,
>> + ADV748X_I2C_EDID,
>> + ADV748X_I2C_REPEATER,
>> + ADV748X_I2C_INFOFRAME,
>> + ADV748X_I2C_CEC,
>> + ADV748X_I2C_SDP,
>> + ADV748X_I2C_TXB,
>> + ADV748X_I2C_TXA,
>> +};
>> +
>> +static int adv748x_read_check(struct adv748x_state *state,
>> + int client_page, u8 reg)
>> +{
>> + struct i2c_client *client = state->i2c_clients[client_page];
>> + int err;
>> + unsigned int val;
>> +
>> + err = regmap_read(state->regmap[client_page], reg, &val);
>> +
>> + if (err) {
>> + adv_err(state, "error reading %02x, %02x\n",
>> + client->addr, reg);
>> + return err;
>> + }
>> +
>> + return val;
>> +}
>> +
>> +int adv748x_read(struct adv748x_state *state, u8 page, u8 reg)
>> +{
>> + return adv748x_read_check(state, page, reg);
>> +}
>> +
>> +int adv748x_write(struct adv748x_state *state, u8 page, u8 reg, u8 value)
>> +{
>> + return regmap_write(state->regmap[page], reg, value);
>> +}
>> +
>> +/* adv748x_write_block(): Write raw data with a maximum of I2C_SMBUS_BLOCK_MAX
>> + * size to one or more registers.
>> + *
>> + * A value of zero will be returned on success, a negative errno will
>> + * be returned in error cases.
>> + */
>> +int adv748x_write_block(struct adv748x_state *state, int client_page,
>> + unsigned int init_reg, const void *val,
>> + size_t val_len)
>> +{
>> + struct regmap *regmap = state->regmap[client_page];
>> +
>> + if (val_len > I2C_SMBUS_BLOCK_MAX)
>> + val_len = I2C_SMBUS_BLOCK_MAX;
>> +
>> + return regmap_raw_write(regmap, init_reg, val, val_len);
>> +}
>> +
>> +
>> +static struct i2c_client *adv748x_dummy_client(struct adv748x_state *state,
>> + u8 addr, u8 io_reg)
>> +{
>> + struct i2c_client *client = state->client;
>> +
>> + if (addr)
>> + io_write(state, io_reg, addr << 1);
>> +
>> + return i2c_new_dummy(client->adapter, io_read(state, io_reg) >> 1);
>> +}
>> +
>> +static void adv748x_unregister_clients(struct adv748x_state *state)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 1; i < ARRAY_SIZE(state->i2c_clients); ++i) {
>> + if (state->i2c_clients[i])
>> + i2c_unregister_device(state->i2c_clients[i]);
>> + }
>> +}
>> +
>> +static int adv748x_initialise_clients(struct adv748x_state *state)
>> +{
>> + int i;
>> + int ret;
>> +
>> + for (i = ADV748X_PAGE_DPLL; i < ADV748X_PAGE_MAX; ++i) {
>> + state->i2c_clients[i] =
>> + adv748x_dummy_client(state, adv748x_i2c_addresses[i],
>> + ADV748X_IO_SLAVE_ADDR_BASE + i);
>> + if (state->i2c_clients[i] == NULL) {
>> + adv_err(state, "failed to create i2c client %u\n", i);
>> + return -ENOMEM;
>> + }
>> +
>> + ret = adv748x_configure_regmap(state, i);
>> + if (ret)
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * struct adv748x_reg_value - Register write instruction
>> + * @page: Regmap page identifier
>> + * @reg: I2C register
>> + * @value: value to write to @page at @reg
>> + */
>> +struct adv748x_reg_value {
>> + u8 page;
>> + u8 reg;
>> + u8 value;
>> +};
>> +
>> +static int adv748x_write_regs(struct adv748x_state *state,
>> + const struct adv748x_reg_value *regs)
>> +{
>> + int ret;
>> +
>> + while (regs->page != ADV748X_PAGE_EOR) {
>> + if (regs->page == ADV748X_PAGE_WAIT) {
>> + msleep(regs->value);
>> + } else {
>> + ret = adv748x_write(state, regs->page, regs->reg,
>> + regs->value);
>> + if (ret < 0) {
>> + adv_err(state,
>> + "Error regs page: 0x%02x reg: 0x%02x\n",
>> + regs->page, regs->reg);
>> + return ret;
>> + }
>> + }
>> + regs++;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +
>> +/* -----------------------------------------------------------------------------
>> + * TXA and TXB
>> + */
>> +
>> +static const struct adv748x_reg_value adv748x_power_up_txa_4lane[] = {
>> +
>> + {ADV748X_PAGE_TXA, 0x00, 0x84}, /* Enable 4-lane MIPI */
>> + {ADV748X_PAGE_TXA, 0x00, 0xa4}, /* Set Auto DPHY Timing */
>> +
>> + {ADV748X_PAGE_TXA, 0x31, 0x82}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0x1e, 0x40}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x02},/* delay 2 */
>> + {ADV748X_PAGE_TXA, 0x00, 0x24 },/* Power-up CSI-TX */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
>> + {ADV748X_PAGE_TXA, 0xc1, 0x2b}, /* ADI Required Write */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
>> + {ADV748X_PAGE_TXA, 0x31, 0x80}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>> +};
>> +
>> +static const struct adv748x_reg_value adv748x_power_down_txa_4lane[] = {
>> +
>> + {ADV748X_PAGE_TXA, 0x31, 0x82}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0x1e, 0x00}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0x00, 0x84}, /* Enable 4-lane MIPI */
>> + {ADV748X_PAGE_TXA, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
>> + {ADV748X_PAGE_TXA, 0xc1, 0x3b}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>> +};
>> +
>> +static const struct adv748x_reg_value adv748x_power_up_txb_1lane[] = {
>> +
>> + {ADV748X_PAGE_TXB, 0x00, 0x81}, /* Enable 1-lane MIPI */
>> + {ADV748X_PAGE_TXB, 0x00, 0xa1}, /* Set Auto DPHY Timing */
>> +
>> + {ADV748X_PAGE_TXB, 0x31, 0x82}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0x1e, 0x40}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x02},/* delay 2 */
>> + {ADV748X_PAGE_TXB, 0x00, 0x21 },/* Power-up CSI-TX */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
>> + {ADV748X_PAGE_TXB, 0xc1, 0x2b}, /* ADI Required Write */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
>> + {ADV748X_PAGE_TXB, 0x31, 0x80}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>> +};
>> +
>> +static const struct adv748x_reg_value adv748x_power_down_txb_1lane[] = {
>> +
>> + {ADV748X_PAGE_TXB, 0x31, 0x82}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0x1e, 0x00}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0x00, 0x81}, /* Enable 4-lane MIPI */
>> + {ADV748X_PAGE_TXB, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
>> + {ADV748X_PAGE_TXB, 0xc1, 0x3b}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>> +};
>> +
>> +int adv748x_txa_power(struct adv748x_state *state, bool on)
>> +{
>> + int val;
>> +
>> + val = txa_read(state, ADV748X_CSI_FS_AS_LS);
>> + if (val < 0)
>> + return val;
>> +
>> + /*
>> + * This test against BIT(6) is not documented by the datasheet, but was
>> + * specified in the downstream driver.
>> + * Track with a WARN_ONCE to determine if it is ever set by HW.
>> + */
>> + WARN_ONCE((on && val & ADV748X_CSI_FS_AS_LS_UNKNOWN),
>> + "Enabling with unknown bit set");
>> +
>> + if (on)
>> + return adv748x_write_regs(state, adv748x_power_up_txa_4lane);
>> + else
>
> 'else' isn't needed.

That's a shame - I think the code is more elegant (/symmetrical) this way - but
no worries.
Adapted. (same for the others)

>
>> + return adv748x_write_regs(state, adv748x_power_down_txa_4lane);
>> +}
>> +
>> +int adv748x_txb_power(struct adv748x_state *state, bool on)
>> +{
>> + int val;
>> +
>> + val = txb_read(state, ADV748X_CSI_FS_AS_LS);
>> + if (val < 0)
>> + return val;
>> +
>> + /*
>> + * This test against BIT(6) is not documented by the datasheet, but was
>> + * specified in the downstream driver.
>> + * Track with a WARN_ONCE to determine if it is ever set by HW.
>> + */
>> + WARN_ONCE((on && val & ADV748X_CSI_FS_AS_LS_UNKNOWN),
>> + "Enabling with unknown bit set");
>> +
>> + if (on)
>> + return adv748x_write_regs(state, adv748x_power_up_txb_1lane);
>> + else
>
> Ditto.
>
>> + return adv748x_write_regs(state, adv748x_power_down_txb_1lane);
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Media Operations
>> + */
>> +
>> +static const struct media_entity_operations adv748x_media_ops = {
>> + .link_validate = v4l2_subdev_link_validate,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * HW setup
>> + */
>> +
>> +static const struct adv748x_reg_value adv748x_sw_reset[] = {
>> +
>> + {ADV748X_PAGE_IO, 0xff, 0xff}, /* SW reset */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x05},/* delay 5 */
>> + {ADV748X_PAGE_IO, 0x01, 0x76}, /* ADI Required Write */
>> + {ADV748X_PAGE_IO, 0xf2, 0x01}, /* Enable I2C Read Auto-Increment */
>> + {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>> +};
>> +
>> +static const struct adv748x_reg_value adv748x_set_slave_address[] = {
>> + {ADV748X_PAGE_IO, 0xf3, ADV748X_I2C_DPLL << 1},
>> + {ADV748X_PAGE_IO, 0xf4, ADV748X_I2C_CP << 1},
>> + {ADV748X_PAGE_IO, 0xf5, ADV748X_I2C_HDMI << 1},
>> + {ADV748X_PAGE_IO, 0xf6, ADV748X_I2C_EDID << 1},
>> + {ADV748X_PAGE_IO, 0xf7, ADV748X_I2C_REPEATER << 1},
>> + {ADV748X_PAGE_IO, 0xf8, ADV748X_I2C_INFOFRAME << 1},
>> + {ADV748X_PAGE_IO, 0xfa, ADV748X_I2C_CEC << 1},
>> + {ADV748X_PAGE_IO, 0xfb, ADV748X_I2C_SDP << 1},
>> + {ADV748X_PAGE_IO, 0xfc, ADV748X_I2C_TXB << 1},
>> + {ADV748X_PAGE_IO, 0xfd, ADV748X_I2C_TXA << 1},
>> + {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>> +};
>> +
>> +/* Supported Formats For Script Below */
>> +/* - 01-29 HDMI to MIPI TxA CSI 4-Lane - RGB888: */
>> +static const struct adv748x_reg_value adv748x_init_txa_4lane[] = {
>> + /* Disable chip powerdown & Enable HDMI Rx block */
>> + {ADV748X_PAGE_IO, 0x00, 0x40},
>> +
>> + {ADV748X_PAGE_REPEATER, 0x40, 0x83}, /* Enable HDCP 1.1 */
>> +
>> + {ADV748X_PAGE_HDMI, 0x00, 0x08},/* Foreground Channel = A */
>> + {ADV748X_PAGE_HDMI, 0x98, 0xff},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x99, 0xa3},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x9a, 0x00},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x9b, 0x0a},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x9d, 0x40},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0xcb, 0x09},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x3d, 0x10},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x3e, 0x7b},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x3f, 0x5e},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x4e, 0xfe},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x4f, 0x18},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x57, 0xa3},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x58, 0x04},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0x85, 0x10},/* ADI Required Write */
>> +
>> + {ADV748X_PAGE_HDMI, 0x83, 0x00},/* Enable All Terminations */
>> + {ADV748X_PAGE_HDMI, 0xa3, 0x01},/* ADI Required Write */
>> + {ADV748X_PAGE_HDMI, 0xbe, 0x00},/* ADI Required Write */
>> +
>> + {ADV748X_PAGE_HDMI, 0x6c, 0x01},/* HPA Manual Enable */
>> + {ADV748X_PAGE_HDMI, 0xf8, 0x01},/* HPA Asserted */
>> + {ADV748X_PAGE_HDMI, 0x0f, 0x00},/* Audio Mute Speed Set to Fastest */
>> + /* (Smallest Step Size) */
>> +
>> + {ADV748X_PAGE_IO, 0x04, 0x02}, /* RGB Out of CP */
>> + {ADV748X_PAGE_IO, 0x12, 0xf0}, /* CSC Depends on ip Packets, SDR 444 */
>> + {ADV748X_PAGE_IO, 0x17, 0x80}, /* Luma & Chroma can reach 254d */
>> + {ADV748X_PAGE_IO, 0x03, 0x86}, /* CP-Insert_AV_Code */
>> +
>> + {ADV748X_PAGE_CP, 0x7c, 0x00}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_IO, 0x0c, 0xe0}, /* Enable LLC_DLL & Double LLC Timing */
>> + {ADV748X_PAGE_IO, 0x0e, 0xdd}, /* LLC/PIX/SPI PINS TRISTATED AUD */
>> + /* Outputs Enabled */
>> + {ADV748X_PAGE_IO, 0x10, 0xa0}, /* Enable 4-lane CSI Tx & Pixel Port */
>> +
>> + {ADV748X_PAGE_TXA, 0x00, 0x84}, /* Enable 4-lane MIPI */
>> + {ADV748X_PAGE_TXA, 0x00, 0xa4}, /* Set Auto DPHY Timing */
>> + {ADV748X_PAGE_TXA, 0xdb, 0x10}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0xd6, 0x07}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0xc4, 0x0a}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0x71, 0x33}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0x72, 0x11}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0xf0, 0x00}, /* i2c_dphy_pwdn - 1'b0 */
>> +
>> + {ADV748X_PAGE_TXA, 0x31, 0x82}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0x1e, 0x40}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXA, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x02},/* delay 2 */
>> + {ADV748X_PAGE_TXA, 0x00, 0x24 },/* Power-up CSI-TX */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
>> + {ADV748X_PAGE_TXA, 0xc1, 0x2b}, /* ADI Required Write */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
>> + {ADV748X_PAGE_TXA, 0x31, 0x80}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>> +};
>> +
>> +/* 02-01 Analog CVBS to MIPI TX-B CSI 1-Lane - */
>> +/* Autodetect CVBS Single Ended In Ain 1 - MIPI Out */
>> +static const struct adv748x_reg_value adv748x_init_txb_1lane[] = {
>> +
>> + {ADV748X_PAGE_IO, 0x00, 0x30}, /* Disable chip powerdown Rx */
>> + {ADV748X_PAGE_IO, 0xf2, 0x01}, /* Enable I2C Read Auto-Increment */
>> +
>> + {ADV748X_PAGE_IO, 0x0e, 0xff}, /* LLC/PIX/AUD/SPI PINS TRISTATED */
>> +
>> + {ADV748X_PAGE_SDP, 0x0f, 0x00}, /* Exit Power Down Mode */
>> + {ADV748X_PAGE_SDP, 0x52, 0xcd}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_SDP, 0x0e, 0x80}, /* ADI Required Write */
>> + {ADV748X_PAGE_SDP, 0x9c, 0x00}, /* ADI Required Write */
>> + {ADV748X_PAGE_SDP, 0x9c, 0xff}, /* ADI Required Write */
>> + {ADV748X_PAGE_SDP, 0x0e, 0x00}, /* ADI Required Write */
>> +
>> + /* ADI recommended writes for improved video quality */
>> + {ADV748X_PAGE_SDP, 0x80, 0x51}, /* ADI Required Write */
>> + {ADV748X_PAGE_SDP, 0x81, 0x51}, /* ADI Required Write */
>> + {ADV748X_PAGE_SDP, 0x82, 0x68}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_SDP, 0x03, 0x42}, /* Tri-S Output , PwrDwn 656 pads */
>> + {ADV748X_PAGE_SDP, 0x04, 0xb5}, /* ITU-R BT.656-4 compatible */
>> + {ADV748X_PAGE_SDP, 0x13, 0x00}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_SDP, 0x17, 0x41}, /* Select SH1 */
>> + {ADV748X_PAGE_SDP, 0x31, 0x12}, /* ADI Required Write */
>> + {ADV748X_PAGE_SDP, 0xe6, 0x4f}, /* V bit end pos manually in NTSC */
>> +
>> + /* Enable 1-Lane MIPI Tx, */
>> + /* enable pixel output and route SD through Pixel port */
>> + {ADV748X_PAGE_IO, 0x10, 0x70},
>> +
>> + {ADV748X_PAGE_TXB, 0x00, 0x81}, /* Enable 1-lane MIPI */
>> + {ADV748X_PAGE_TXB, 0x00, 0xa1}, /* Set Auto DPHY Timing */
>> + {ADV748X_PAGE_TXB, 0xd2, 0x40}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0xc4, 0x0a}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0x71, 0x33}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0x72, 0x11}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0xf0, 0x00}, /* i2c_dphy_pwdn - 1'b0 */
>> + {ADV748X_PAGE_TXB, 0x31, 0x82}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0x1e, 0x40}, /* ADI Required Write */
>> + {ADV748X_PAGE_TXB, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
>> +
>> + {ADV748X_PAGE_WAIT, 0x00, 0x02},/* delay 2 */
>> + {ADV748X_PAGE_TXB, 0x00, 0x21 },/* Power-up CSI-TX */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
>> + {ADV748X_PAGE_TXB, 0xc1, 0x2b}, /* ADI Required Write */
>> + {ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
>> + {ADV748X_PAGE_TXB, 0x31, 0x80}, /* ADI Required Write */
>> +
>> + {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>> +};
>> +
>> +static int adv748x_reset(struct adv748x_state *state)
>> +{
>> + int ret;
>> +
>> + ret = adv748x_write_regs(state, adv748x_sw_reset);
>> + if (ret < 0)
>> + return ret;
>> +
>> + ret = adv748x_write_regs(state, adv748x_set_slave_address);
>> + if (ret < 0)
>> + return ret;
>> +
>> + /* Init and power down TXA */
>> + ret = adv748x_write_regs(state, adv748x_init_txa_4lane);
>> + if (ret)
>> + return ret;
>> +
>> + adv748x_txa_power(state, 0);
>> +
>> + /* Init and power down TXB */
>> + ret = adv748x_write_regs(state, adv748x_init_txb_1lane);
>> + if (ret)
>> + return ret;
>> +
>> + adv748x_txb_power(state, 0);
>> +
>> + /* Disable chip powerdown & Enable HDMI Rx block */
>> + io_write(state, ADV748X_IO_PD, ADV748X_IO_PD_RX_EN);
>> +
>> + /* Enable 4-lane CSI Tx & Pixel Port */
>> + io_write(state, ADV748X_IO_10, ADV748X_IO_10_CSI4_EN |
>> + ADV748X_IO_10_CSI1_EN |
>> + ADV748X_IO_10_PIX_OUT_EN);
>> +
>> + /* Use vid_std and v_freq as freerun resolution for CP */
>> + cp_clrset(state, ADV748X_CP_CLMP_POS, ADV748X_CP_CLMP_POS_DIS_AUTO,
>> + ADV748X_CP_CLMP_POS_DIS_AUTO);
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_identify_chip(struct adv748x_state *state)
>> +{
>> + int msb, lsb;
>> +
>> + lsb = io_read(state, ADV748X_IO_CHIP_REV_ID_1);
>> + msb = io_read(state, ADV748X_IO_CHIP_REV_ID_2);
>> +
>> + if (lsb < 0 || msb < 0) {
>> + adv_err(state, "Failed to read chip revision\n");
>> + return -EIO;
>> + }
>> +
>> + adv_info(state, "chip found @ 0x%02x revision %02x%02x\n",
>> + state->client->addr << 1, lsb, msb);
>> +
>> + return 0;
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * i2c driver
>> + */
>> +
>> +void adv748x_subdev_init(struct v4l2_subdev *sd, struct adv748x_state *state,
>> + const struct v4l2_subdev_ops *ops, u32 function,
>> + const char *ident)
>> +{
>> + v4l2_subdev_init(sd, ops);
>> + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
>> +
>> + /* the owner is the same as the i2c_client's driver owner */
>> + sd->owner = state->dev->driver->owner;
>> + sd->dev = state->dev;
>> +
>> + v4l2_set_subdevdata(sd, state);
>> +
>> + /* initialize name */
>> + snprintf(sd->name, sizeof(sd->name), "%s %d-%04x %s",
>> + state->dev->driver->name,
>> + i2c_adapter_id(state->client->adapter),
>> + state->client->addr, ident);
>> +
>> + sd->entity.function = function;
>> + sd->entity.ops = &adv748x_media_ops;
>> +}
>> +
>> +static int adv748x_parse_dt(struct adv748x_state *state)
>> +{
>> + struct device_node *ep_np = NULL;
>> + struct of_endpoint ep;
>> + bool found = false;
>> +
>> + for_each_endpoint_of_node(state->dev->of_node, ep_np) {
>> + of_graph_parse_endpoint(ep_np, &ep);
>> + adv_info(state, "Endpoint %s on port %d",
>> + of_node_full_name(ep.local_node),
>> + ep.port);
>> +
>> + if (ep.port >= ADV748X_PORT_MAX) {
>> + adv_err(state, "Invalid endpoint %s on port %d",
>> + of_node_full_name(ep.local_node),
>> + ep.port);
>> +
>> + continue;
>> + }
>> +
>> + if (state->endpoints[ep.port]) {
>> + adv_err(state,
>> + "Multiple port endpoints are not supported");
>> + continue;
>> + }
>> +
>> + of_node_get(ep_np);
>> + state->endpoints[ep.port] = ep_np;
>> +
>> + found = true;
>> + }
>> +
>> + return found ? 0 : -ENODEV;
>> +}
>> +
>> +static void adv748x_dt_cleanup(struct adv748x_state *state)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < ADV748X_PORT_MAX; i++)
>> + of_node_put(state->endpoints[i]);
>> +}
>> +
>> +static int adv748x_setup_links(struct adv748x_state *state)
>> +{
>> + int ret;
>> + int enabled = MEDIA_LNK_FL_ENABLED;
>> +
>> +/*
>> + * HACK/Workaround:
>> + *
>> + * Currently non-immutable link resets go through the RVin
>> + * driver, and cause the links to fail, due to not being part of RVIN.
>> + * As a temporary workaround until the RVIN driver knows better than to parse
>> + * links that do not belong to it, use static immutable links for our internal
>> + * media paths.
>> + */
>> +#define ADV748x_DEV_STATIC_LINKS
>> +#ifdef ADV748x_DEV_STATIC_LINKS
>> + enabled |= MEDIA_LNK_FL_IMMUTABLE;
>> +#endif
>
> Has an RVIN patch fixing this been posted yet? If not, is anyone looking at that?
> Perhaps this should use #ifdef CONFIG_VIDEO_RCAR_VIN instead of inventing a define?

Sorry - this is actaully dead code from the V4 - adv748x_setup_links isn't even
called in this version. Niklas noticed it - with removal in V5.

I've converted to just supporting static links. Which is better as there is no
code to support changing the routing yet anyway.

>
>> +
>> + /* TXA - Default link is with HDMI */
>> + ret = media_create_pad_link(&state->hdmi.sd.entity, 1,
>> + &state->txa.sd.entity, 0, enabled);
>> + if (ret) {
>> + adv_err(state, "Failed to create HDMI-TXA pad link");
>> + return ret;
>> + }
>> +
>> +#ifndef ADV748x_DEV_STATIC_LINKS
>> + ret = media_create_pad_link(&state->afe.sd.entity, ADV748X_AFE_SOURCE,
>> + &state->txa.sd.entity, 0, 0);
>> + if (ret) {
>> + adv_err(state, "Failed to create AFE-TXA pad link");
>> + return ret;
>> + }
>> +#endif
>> +
>> + /* TXB - Can only output from the AFE */
>> + ret = media_create_pad_link(&state->afe.sd.entity, ADV748X_AFE_SOURCE,
>> + &state->txb.sd.entity, 0, enabled);
>> + if (ret) {
>> + adv_err(state, "Failed to create AFE-TXB pad link");
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +int adv748x_register_subdevs(struct adv748x_state *state,
>> + struct v4l2_device *v4l2_dev)
>> +{
>> + int ret;
>> +
>> + ret = v4l2_device_register_subdev(v4l2_dev, &state->hdmi.sd);
>> + if (ret < 0)
>> + return ret;
>> +
>> + ret = v4l2_device_register_subdev(v4l2_dev, &state->afe.sd);
>> + if (ret < 0)
>> + goto err_unregister_hdmi;
>> +
>> + ret = adv748x_setup_links(state);
>> + if (ret < 0)
>> + goto err_unregister_afe;
>> +
>> + return 0;
>> +
>> +err_unregister_afe:
>> + v4l2_device_unregister_subdev(&state->afe.sd);
>> +err_unregister_hdmi:
>> + v4l2_device_unregister_subdev(&state->hdmi.sd);
>> +
>> + return ret;
>> +}
>> +
>> +static int adv748x_probe(struct i2c_client *client,
>> + const struct i2c_device_id *id)
>> +{
>> + struct adv748x_state *state;
>> + int ret;
>> +
>> + /* Check if the adapter supports the needed features */
>> + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
>> + return -EIO;
>> +
>> + state = kzalloc(sizeof(struct adv748x_state), GFP_KERNEL);
>> + if (!state)
>> + return -ENOMEM;
>> +
>> + mutex_init(&state->mutex);
>> +
>> + state->dev = &client->dev;
>> + state->client = client;
>> + state->i2c_clients[ADV748X_PAGE_IO] = client;
>> + i2c_set_clientdata(client, state);
>> +
>> + /* Discover and process ports declared by the Device tree endpoints */
>> + ret = adv748x_parse_dt(state);
>> + if (ret) {
>> + adv_err(state, "Failed to parse device tree");
>> + goto err_free_mutex;
>> + }
>> +
>> + /* Configure IO Regmap region */
>> + ret = adv748x_configure_regmap(state, ADV748X_PAGE_IO);
>> + if (ret) {
>> + adv_err(state, "Error configuring IO regmap region");
>> + goto err_cleanup_dt;
>> + }
>> +
>> + ret = adv748x_identify_chip(state);
>> + if (ret) {
>> + adv_err(state, "Failed to identify chip");
>> + goto err_cleanup_clients;
>> + }
>> +
>> + /* Configure remaining pages as I2C clients with regmap access */
>> + ret = adv748x_initialise_clients(state);
>> + if (ret) {
>> + adv_err(state, "Failed to setup client regmap pages");
>> + goto err_cleanup_clients;
>> + }
>> +
>> + /* SW reset ADV748X to its default values */
>> + ret = adv748x_reset(state);
>> + if (ret) {
>> + adv_err(state, "Failed to reset hardware");
>> + goto err_cleanup_clients;
>> + }
>> +
>> + /* Initialise HDMI */
>> + ret = adv748x_hdmi_init(&state->hdmi);
>> + if (ret) {
>> + adv_err(state, "Failed to probe HDMI");
>> + goto err_cleanup_clients;
>> + }
>> +
>> + /* Initialise AFE */
>> + ret = adv748x_afe_init(&state->afe);
>> + if (ret) {
>> + adv_err(state, "Failed to probe AFE");
>> + goto err_cleanup_hdmi;
>> + }
>> +
>> + /* Initialise TXA */
>> + ret = adv748x_csi2_init(state, &state->txa);
>> + if (ret) {
>> + adv_err(state, "Failed to probe TXA");
>> + goto err_cleanup_afe;
>> + }
>> +
>> + /* Initialise TXB */
>> + ret = adv748x_csi2_init(state, &state->txb);
>> + if (ret) {
>> + adv_err(state, "Failed to probe TXB");
>> + goto err_cleanup_txa;
>> + }
>> +
>> + return 0;
>> +
>> +err_cleanup_txa:
>> + adv748x_csi2_cleanup(&state->txa);
>> +err_cleanup_afe:
>> + adv748x_afe_cleanup(&state->afe);
>> +err_cleanup_hdmi:
>> + adv748x_hdmi_cleanup(&state->hdmi);
>> +err_cleanup_clients:
>> + adv748x_unregister_clients(state);
>> +err_cleanup_dt:
>> + adv748x_dt_cleanup(state);
>> +err_free_mutex:
>> + mutex_destroy(&state->mutex);
>> + kfree(state);
>> +
>> + return ret;
>> +}
>> +
>> +static int adv748x_remove(struct i2c_client *client)
>> +{
>> + struct adv748x_state *state = i2c_get_clientdata(client);
>> +
>> + adv748x_afe_cleanup(&state->afe);
>> + adv748x_hdmi_cleanup(&state->hdmi);
>> +
>> + adv748x_csi2_cleanup(&state->txa);
>> + adv748x_csi2_cleanup(&state->txb);
>> +
>> + adv748x_unregister_clients(state);
>> + adv748x_dt_cleanup(state);
>> + mutex_destroy(&state->mutex);
>> +
>> + kfree(state);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct i2c_device_id adv748x_id[] = {
>> + { "adv7481", 0 },
>> + { "adv7482", 0 },
>> + { },
>> +};
>> +
>> +static const struct of_device_id adv748x_of_table[] = {
>> + { .compatible = "adi,adv7481", },
>> + { .compatible = "adi,adv7482", },
>> + { }
>> +};
>> +MODULE_DEVICE_TABLE(of, adv748x_of_table);
>> +
>> +static struct i2c_driver adv748x_driver = {
>> + .driver = {
>> + .name = "adv748x",
>> + .of_match_table = adv748x_of_table,
>> + },
>> + .probe = adv748x_probe,
>> + .remove = adv748x_remove,
>> + .id_table = adv748x_id,
>> +};
>> +
>> +module_i2c_driver(adv748x_driver);
>> +
>> +MODULE_AUTHOR("Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>");
>> +MODULE_DESCRIPTION("ADV748X video decoder");
>> +MODULE_LICENSE("GPL v2");
>> diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c
>> b/drivers/media/i2c/adv748x/adv748x-csi2.c
>> new file mode 100644
>> index 000000000000..a9b7fbd93530
>> --- /dev/null
>> +++ b/drivers/media/i2c/adv748x/adv748x-csi2.c
>> @@ -0,0 +1,323 @@
>> +/*
>> + * Driver for Analog Devices ADV748X CSI-2 Transmitter
>> + *
>> + * Copyright (C) 2017 Renesas Electronics Corp.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms of the GNU General Public License as published by the
>> + * Free Software Foundation; either version 2 of the License, or (at your
>> + * option) any later version.
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/mutex.h>
>> +
>> +#include <media/v4l2-ctrls.h>
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-ioctl.h>
>> +
>> +#include "adv748x.h"
>> +
>> +static bool is_txa(struct adv748x_csi2 *tx)
>> +{
>> + return tx == &tx->state->txa;
>> +}
>> +
>> +static int adv748x_csi2_set_virtual_channel(struct adv748x_csi2 *tx,
>> + unsigned int vc)
>> +{
>> + return tx_write(tx, ADV748X_CSI_VC_REF, vc << ADV748X_CSI_VC_REF_SHIFT);
>> +}
>> +
>> +/**
>> + * adv748x_csi2_register_link : Register and link internal entities
>> + *
>> + * @tx: CSI2 private entity
>> + * @v4l2_dev: Video registration device
>> + * @src: Source subdevice to establish link
>> + * @src_pad: Pad number of source to link to this @tx
>> + * @preferred: Specify if this link is preferred over pre-existing links
>> + *
>> + * Ensure that the subdevice is registered against the v4l2_device, and link the
>> + * source pad to the sink pad of the CSI2 bus entity.
>> + */
>> +static int adv748x_csi2_register_link(struct adv748x_csi2 *tx,
>> + struct v4l2_device *v4l2_dev,
>> + struct v4l2_subdev *src,
>> + unsigned int src_pad,
>> + bool preferred)
>> +{
>> + int enabled = 0;
>> + int ret;
>> +
>> + if (preferred)
>> + enabled = MEDIA_LNK_FL_ENABLED;
>> +
>> + if (!src->v4l2_dev) {
>> + ret = v4l2_device_register_subdev(v4l2_dev, src);
>> + if (ret)
>> + return ret;
>> + }
>> +
>> + return media_create_pad_link(&src->entity, src_pad,
>> + &tx->sd.entity, ADV748X_CSI2_SINK,
>> + enabled);
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_internal_ops
>> + *
>> + * We use the internal registered operation to be able to ensure that our
>> + * incremental subdevices (not connected in the forward path) can be registered
>> + * against the resulting video path and media device.
>> + */
>> +
>> +static int adv748x_csi2_registered(struct v4l2_subdev *sd)
>> +{
>> + struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
>> + struct adv748x_state *state = tx->state;
>> + int ret;
>> +
>> + adv_dbg(state, "Registered %s (%s)", is_txa(tx) ? "TXA":"TXB",
>> + sd->name);
>> +
>> + ret = adv748x_csi2_register_link(tx, sd->v4l2_dev, &state->afe.sd,
>> + ADV748X_AFE_SOURCE, !is_txa(tx));
>> + if (ret)
>> + return ret;
>> +
>> + /* TX-B only supports AFE */
>> + if (!is_txa(tx))
>> + return 0;
>> +
>> + return adv748x_csi2_register_link(tx, sd->v4l2_dev, &state->hdmi.sd,
>> + ADV748X_HDMI_SOURCE, true);
>> +}
>> +
>> +static const struct v4l2_subdev_internal_ops adv748x_csi2_internal_ops = {
>> + .registered = adv748x_csi2_registered,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_video_ops
>> + */
>> +
>> +static int adv748x_csi2_s_stream(struct v4l2_subdev *sd, int enable)
>> +{
>> + struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
>> + struct v4l2_subdev *src;
>> +
>> + src = adv748x_get_remote_sd(&tx->pads[ADV748X_CSI2_SINK]);
>> + if (!src)
>> + return -EPIPE;
>> +
>> + return v4l2_subdev_call(src, video, s_stream, enable);
>> +}
>> +
>> +static const struct v4l2_subdev_video_ops adv748x_csi2_video_ops = {
>> + .s_stream = adv748x_csi2_s_stream,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_pad_ops
>> + *
>> + * The CSI2 bus pads are ignorant to the data sizes or formats.
>> + * But we must support setting the pad formats for format propagation.
>> + */
>> +
>> +static struct v4l2_mbus_framefmt *
>> +adv748x_csi2_get_pad_format(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + unsigned int pad, u32 which)
>> +{
>> + struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
>> +
>> + if (which == V4L2_SUBDEV_FORMAT_TRY)
>> + return v4l2_subdev_get_try_format(sd, cfg, pad);
>> + else
>
> 'else' is not needed.
>
>> + return &tx->format;
>> +}
>> +
>> +static int adv748x_csi2_get_format(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_format *sdformat)
>> +{
>> + struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
>> + struct adv748x_state *state = tx->state;
>> + struct v4l2_mbus_framefmt *mbusformat;
>> +
>> + mbusformat = adv748x_csi2_get_pad_format(sd, cfg, sdformat->pad,
>> + sdformat->which);
>> + if (!mbusformat)
>> + return -EINVAL;
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + sdformat->format = *mbusformat;
>> +
>> + mutex_unlock(&state->mutex);
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_csi2_set_format(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_format *sdformat)
>> +{
>> + struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
>> + struct adv748x_state *state = tx->state;
>> + struct v4l2_mbus_framefmt *mbusformat;
>> + int ret = 0;
>> +
>> + mbusformat = adv748x_csi2_get_pad_format(sd, cfg, sdformat->pad,
>> + sdformat->which);
>> + if (!mbusformat)
>> + return -EINVAL;
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + if (sdformat->pad == ADV748X_CSI2_SOURCE) {
>> + const struct v4l2_mbus_framefmt *sink_fmt;
>> +
>> + sink_fmt = adv748x_csi2_get_pad_format(sd, cfg,
>> + ADV748X_CSI2_SINK,
>> + sdformat->which);
>> +
>> + if (!sink_fmt) {
>> + ret = -EINVAL;
>> + goto unlock;
>> + }
>> +
>> + sdformat->format = *sink_fmt;
>> + }
>> +
>> + *mbusformat = sdformat->format;
>> +
>> +unlock:
>> + mutex_unlock(&state->mutex);
>> +
>> + return ret;
>> +}
>> +
>> +static const struct v4l2_subdev_pad_ops adv748x_csi2_pad_ops = {
>> + .get_fmt = adv748x_csi2_get_format,
>> + .set_fmt = adv748x_csi2_set_format,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_ops
>> + */
>> +
>> +static const struct v4l2_subdev_ops adv748x_csi2_ops = {
>> + .video = &adv748x_csi2_video_ops,
>> + .pad = &adv748x_csi2_pad_ops,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Subdev module and controls
>> + */
>> +
>> +int adv748x_csi2_set_pixelrate(struct v4l2_subdev *sd, s64 rate)
>> +{
>> + struct v4l2_ctrl *ctrl;
>> +
>> + ctrl = v4l2_ctrl_find(sd->ctrl_handler, V4L2_CID_PIXEL_RATE);
>> + if (!ctrl)
>> + return -EINVAL;
>> +
>> + return v4l2_ctrl_s_ctrl_int64(ctrl, rate);
>> +}
>> +
>> +static int adv748x_csi2_s_ctrl(struct v4l2_ctrl *ctrl)
>> +{
>> + switch (ctrl->id) {
>> + case V4L2_CID_PIXEL_RATE:
>> + return 0;
>> + default:
>> + return -EINVAL;
>> + }
>> +}
>> +
>> +static const struct v4l2_ctrl_ops adv748x_csi2_ctrl_ops = {
>> + .s_ctrl = adv748x_csi2_s_ctrl,
>> +};
>> +
>> +static int adv748x_csi2_init_controls(struct adv748x_csi2 *tx)
>> +{
>> + struct v4l2_ctrl *ctrl;
>> +
>> + v4l2_ctrl_handler_init(&tx->ctrl_hdl, 1);
>> +
>> + ctrl = v4l2_ctrl_new_std(&tx->ctrl_hdl, &adv748x_csi2_ctrl_ops,
>> + V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, 1);
>> +
>> + tx->sd.ctrl_handler = &tx->ctrl_hdl;
>> + if (tx->ctrl_hdl.error) {
>> + v4l2_ctrl_handler_free(&tx->ctrl_hdl);
>> + return tx->ctrl_hdl.error;
>> + }
>> +
>> + return v4l2_ctrl_handler_setup(&tx->ctrl_hdl);
>> +}
>> +
>> +int adv748x_csi2_init(struct adv748x_state *state, struct adv748x_csi2 *tx)
>> +{
>> + struct device_node *ep;
>> + int ret;
>> +
>> + /* We can not use container_of to get back to the state with two TXs */
>> + tx->state = state;
>> + tx->page = is_txa(tx) ? ADV748X_PAGE_TXA : ADV748X_PAGE_TXB;
>> +
>> + ep = state->endpoints[is_txa(tx) ? ADV748X_PORT_TXA : ADV748X_PORT_TXB];
>> + if (!ep) {
>> + adv_err(state, "No endpoint found for %s\n",
>> + is_txa(tx) ? "txa" : "txb");
>> + return -ENODEV;
>> + }
>> +
>> + /* Initialise the virtual channel */
>> + adv748x_csi2_set_virtual_channel(tx, 0);
>> +
>> + adv748x_subdev_init(&tx->sd, state, &adv748x_csi2_ops,
>> + MEDIA_ENT_F_UNKNOWN,
>> + is_txa(tx) ? "txa" : "txb");
>> +
>> + /* Ensure that matching is based upon the endpoint fwnodes */
>> + tx->sd.fwnode = of_fwnode_handle(ep);
>> +
>> + /* Register internal ops for incremental subdev registration */
>> + tx->sd.internal_ops = &adv748x_csi2_internal_ops;
>> +
>> + tx->pads[ADV748X_CSI2_SINK].flags = MEDIA_PAD_FL_SINK;
>> + tx->pads[ADV748X_CSI2_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
>> +
>> + ret = media_entity_pads_init(&tx->sd.entity, ADV748X_CSI2_NR_PADS,
>> + tx->pads);
>> + if (ret)
>> + return ret;
>> +
>> + ret = adv748x_csi2_init_controls(tx);
>> + if (ret)
>> + goto err_free_media;
>> +
>> + ret = v4l2_async_register_subdev(&tx->sd);
>> + if (ret)
>> + goto err_free_ctrl;
>> +
>> + return 0;
>> +
>> +err_free_ctrl:
>> + v4l2_ctrl_handler_free(&tx->ctrl_hdl);
>> +err_free_media:
>> + media_entity_cleanup(&tx->sd.entity);
>> +
>> + return ret;
>> +}
>> +
>> +void adv748x_csi2_cleanup(struct adv748x_csi2 *tx)
>> +{
>> + v4l2_async_unregister_subdev(&tx->sd);
>> + media_entity_cleanup(&tx->sd.entity);
>> + v4l2_ctrl_handler_free(&tx->ctrl_hdl);
>> +}
>> diff --git a/drivers/media/i2c/adv748x/adv748x-hdmi.c
>> b/drivers/media/i2c/adv748x/adv748x-hdmi.c
>> new file mode 100644
>> index 000000000000..8f02c851bbc0
>> --- /dev/null
>> +++ b/drivers/media/i2c/adv748x/adv748x-hdmi.c
>> @@ -0,0 +1,652 @@
>> +/*
>> + * Driver for Analog Devices ADV748X HDMI receiver and Component Processor (CP)
>> + *
>> + * Copyright (C) 2017 Renesas Electronics Corp.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms of the GNU General Public License as published by the
>> + * Free Software Foundation; either version 2 of the License, or (at your
>> + * option) any later version.
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/mutex.h>
>> +
>> +#include <media/v4l2-ctrls.h>
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-dv-timings.h>
>> +#include <media/v4l2-ioctl.h>
>> +
>> +#include <uapi/linux/v4l2-dv-timings.h>
>> +
>> +#include "adv748x.h"
>> +
>> +/* -----------------------------------------------------------------------------
>> + * HDMI and CP
>> + */
>> +
>> +#define ADV748X_HDMI_MIN_WIDTH 640
>> +#define ADV748X_HDMI_MAX_WIDTH 1920
>> +#define ADV748X_HDMI_MIN_HEIGHT 480
>> +#define ADV748X_HDMI_MAX_HEIGHT 1200
>> +#define ADV748X_HDMI_MIN_PIXELCLOCK 0 /* unknown */
>
> I wouldn't use 0 for the min pixelclock. Pick something like 13000000
> instead (the lowest pixelclock rate for CEA timings, lowered by 0.5 MHz).

Ack. I know no better, so I'm happy to use your value.

>
>> +#define ADV748X_HDMI_MAX_PIXELCLOCK 162000000
>> +
>> +static const struct v4l2_dv_timings_cap adv748x_hdmi_timings_cap = {
>> + .type = V4L2_DV_BT_656_1120,
>> + /* keep this initialization for compatibility with GCC < 4.4.6 */
>> + .reserved = { 0 },
>> + /* Min pixelclock value is unknown */
>> + V4L2_INIT_BT_TIMINGS(ADV748X_HDMI_MIN_WIDTH, ADV748X_HDMI_MAX_WIDTH,
>> + ADV748X_HDMI_MIN_HEIGHT, ADV748X_HDMI_MAX_HEIGHT,
>> + ADV748X_HDMI_MIN_PIXELCLOCK,
>> + ADV748X_HDMI_MAX_PIXELCLOCK,
>> + V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT,
>> + V4L2_DV_BT_CAP_INTERLACED |
>
> Has interlaced been tested?

No ...
/me ponders if the kit I have can be easily configured to test this.

Is it better to remove the cap until tested ?

>
>> + V4L2_DV_BT_CAP_PROGRESSIVE)
>> +};
>> +
>> +struct adv748x_hdmi_video_standards {
>> + struct v4l2_dv_timings timings;
>> + u8 vid_std;
>> + u8 v_freq;
>> +};
>> +
>> +static const struct adv748x_hdmi_video_standards
>> +adv748x_hdmi_video_standards[] = {
>> + { V4L2_DV_BT_CEA_720X480I59_94, 0x40, 0x00 },
>> + { V4L2_DV_BT_CEA_720X576I50, 0x41, 0x01 },
>> + { V4L2_DV_BT_CEA_720X480P59_94, 0x4a, 0x00 },
>> + { V4L2_DV_BT_CEA_720X576P50, 0x4b, 0x00 },
>> + { V4L2_DV_BT_CEA_1280X720P60, 0x53, 0x00 },
>> + { V4L2_DV_BT_CEA_1280X720P50, 0x53, 0x01 },
>> + { V4L2_DV_BT_CEA_1280X720P30, 0x53, 0x02 },
>> + { V4L2_DV_BT_CEA_1280X720P25, 0x53, 0x03 },
>> + { V4L2_DV_BT_CEA_1280X720P24, 0x53, 0x04 },
>> + { V4L2_DV_BT_CEA_1920X1080I60, 0x54, 0x00 },
>> + { V4L2_DV_BT_CEA_1920X1080I50, 0x54, 0x01 },
>> + { V4L2_DV_BT_CEA_1920X1080P60, 0x5e, 0x00 },
>> + { V4L2_DV_BT_CEA_1920X1080P50, 0x5e, 0x01 },
>> + { V4L2_DV_BT_CEA_1920X1080P30, 0x5e, 0x02 },
>> + { V4L2_DV_BT_CEA_1920X1080P25, 0x5e, 0x03 },
>> + { V4L2_DV_BT_CEA_1920X1080P24, 0x5e, 0x04 },
>> + /* SVGA */
>> + { V4L2_DV_BT_DMT_800X600P56, 0x80, 0x00 },
>> + { V4L2_DV_BT_DMT_800X600P60, 0x81, 0x00 },
>> + { V4L2_DV_BT_DMT_800X600P72, 0x82, 0x00 },
>> + { V4L2_DV_BT_DMT_800X600P75, 0x83, 0x00 },
>> + { V4L2_DV_BT_DMT_800X600P85, 0x84, 0x00 },
>> + /* SXGA */
>> + { V4L2_DV_BT_DMT_1280X1024P60, 0x85, 0x00 },
>> + { V4L2_DV_BT_DMT_1280X1024P75, 0x86, 0x00 },
>> + /* VGA */
>> + { V4L2_DV_BT_DMT_640X480P60, 0x88, 0x00 },
>> + { V4L2_DV_BT_DMT_640X480P72, 0x89, 0x00 },
>> + { V4L2_DV_BT_DMT_640X480P75, 0x8a, 0x00 },
>> + { V4L2_DV_BT_DMT_640X480P85, 0x8b, 0x00 },
>> + /* XGA */
>> + { V4L2_DV_BT_DMT_1024X768P60, 0x8c, 0x00 },
>> + { V4L2_DV_BT_DMT_1024X768P70, 0x8d, 0x00 },
>> + { V4L2_DV_BT_DMT_1024X768P75, 0x8e, 0x00 },
>> + { V4L2_DV_BT_DMT_1024X768P85, 0x8f, 0x00 },
>> + /* UXGA */
>> + { V4L2_DV_BT_DMT_1600X1200P60, 0x96, 0x00 },
>> +};
>> +
>> +static void adv748x_hdmi_fill_format(struct adv748x_hdmi *hdmi,
>> + struct v4l2_mbus_framefmt *fmt)
>> +{
>> + memset(fmt, 0, sizeof(*fmt));
>> +
>> + fmt->code = MEDIA_BUS_FMT_RGB888_1X24;
>> + fmt->colorspace = V4L2_COLORSPACE_SRGB;
>
> It's OK for now, but the colorspace depends on the AVI InfoFrame contents.
> Add some comment stating this.

Added.

>> + fmt->field = hdmi->timings.bt.interlaced ?
>> + V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE;
>> +
>> + fmt->width = hdmi->timings.bt.width;
>> + fmt->height = hdmi->timings.bt.height;
>> +}
>> +
>> +static void adv748x_fill_optional_dv_timings(struct v4l2_dv_timings *timings)
>> +{
>> + v4l2_find_dv_timings_cap(timings, &adv748x_hdmi_timings_cap,
>> + 250000, NULL, NULL);
>> +}
>> +
>> +static bool adv748x_hdmi_has_signal(struct adv748x_state *state)
>> +{
>> + int val;
>> +
>> + /* Check that VERT_FILTER and DE_REGEN is locked */
>> + val = hdmi_read(state, ADV748X_HDMI_LW1);
>> + return (val & ADV748X_HDMI_LW1_VERT_FILTER) &&
>> + (val & ADV748X_HDMI_LW1_DE_REGEN);
>> +}
>> +
>> +static int adv748x_hdmi_read_pixelclock(struct adv748x_state *state)
>> +{
>> + int a, b;
>> +
>> + a = hdmi_read(state, ADV748X_HDMI_TMDS_1);
>> + b = hdmi_read(state, ADV748X_HDMI_TMDS_2);
>> + if (a < 0 || b < 0)
>> + return -ENODATA;
>> +
>> + /*
>> + * The High 9 bits store TMDS frequency measurement in MHz
>> + * The low 7 bits of TMDS_2 store the 7-bit TMDS fractional frequency
>> + * measurement in 1/128 MHz
>> + */
>> + return ((a << 1) | (b >> 7)) * 1000000 + (b & 0x7f) * 1000000 / 128;
>> +}
>> +
>> +/*
>> + * adv748x_hdmi_set_de_timings: Adjust horizontal picture offset through DE
>> + *
>> + * HDMI CP uses a Data Enable synchronisation timing reference
>> + *
>> + * Vary the leading and trailing edge position of the DE signal output by the CP
>> + * core. Values are stored as signed-twos-complement in one-pixel-clock units
>> + *
>> + * The start and end are shifted equally by the 10-bit shift value.
>> + */
>> +static void adv748x_hdmi_set_de_timings(struct adv748x_state *state, int shift)
>> +{
>> + u8 high, low;
>> +
>> + /* POS_HIGH stores bits 8 and 9 of both the start and end */
>> + high = ADV748X_CP_DE_POS_HIGH_SET;
>> + high |= (shift & 0x300) >> 8;
>> + low = shift & 0xff;
>> +
>> + /* The sequence of the writes is important and must be followed */
>> + cp_write(state, ADV748X_CP_DE_POS_HIGH, high);
>> + cp_write(state, ADV748X_CP_DE_POS_END_LOW, low);
>> +
>> + high |= (shift & 0x300) >> 6;
>> +
>> + cp_write(state, ADV748X_CP_DE_POS_HIGH, high);
>> + cp_write(state, ADV748X_CP_DE_POS_START_LOW, low);
>> +}
>> +
>> +static int adv748x_hdmi_set_video_timings(struct adv748x_state *state,
>> + const struct v4l2_dv_timings *timings)
>> +{
>> + const struct adv748x_hdmi_video_standards *stds =
>> + adv748x_hdmi_video_standards;
>> + unsigned int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(adv748x_hdmi_video_standards); i++) {
>> + if (!v4l2_match_dv_timings(timings, &stds[i].timings, 250000,
>> + false))
>> + continue;
>> + }
>> +
>> + if (i >= ARRAY_SIZE(adv748x_hdmi_video_standards))
>> + return -EINVAL;
>> +
>> + /*
>> + * When setting cp_vid_std to either 720p, 1080i, or 1080p, the video
>> + * will get shifted horizontally to the left in active video mode.
>> + * The de_h_start and de_h_end controls are used to centre the picture
>> + * correctly
>> + */
>> + switch (stds[i].vid_std) {
>> + case 0x53: /* 720p */
>> + adv748x_hdmi_set_de_timings(state, -40);
>> + break;
>> + case 0x54: /* 1080i */
>> + case 0x5e: /* 1080p */
>> + adv748x_hdmi_set_de_timings(state, -44);
>> + break;
>> + default:
>> + adv748x_hdmi_set_de_timings(state, 0);
>> + break;
>> + }
>> +
>> + io_write(state, ADV748X_IO_VID_STD, stds[i].vid_std);
>> + io_clrset(state, ADV748X_IO_DATAPATH, ADV748X_IO_DATAPATH_VFREQ_M,
>> + stds[i].v_freq << ADV748X_IO_DATAPATH_VFREQ_SHIFT);
>> +
>> + return 0;
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_video_ops
>> + */
>> +
>> +static int adv748x_hdmi_s_dv_timings(struct v4l2_subdev *sd,
>> + struct v4l2_dv_timings *timings)
>> +{
>> + struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
>> + struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
>> + int ret;
>> +
>> + if (!timings)
>> + return -EINVAL;
>> +
>> + if (v4l2_match_dv_timings(&hdmi->timings, timings, 0, false))
>> + return 0;
>> +
>> + if (!v4l2_valid_dv_timings(timings, &adv748x_hdmi_timings_cap,
>> + NULL, NULL))
>> + return -ERANGE;
>> +
>> + adv748x_fill_optional_dv_timings(timings);
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + ret = adv748x_hdmi_set_video_timings(state, timings);
>> + if (ret)
>> + goto error;
>> +
>> + hdmi->timings = *timings;
>> +
>> + cp_clrset(state, ADV748X_CP_VID_ADJ_2, ADV748X_CP_VID_ADJ_2_INTERLACED,
>> + timings->bt.interlaced ?
>> + ADV748X_CP_VID_ADJ_2_INTERLACED : 0);
>> +
>> + mutex_unlock(&state->mutex);
>> +
>> + return 0;
>> +
>> +error:
>> + mutex_unlock(&state->mutex);
>> + return ret;
>> +}
>> +
>> +static int adv748x_hdmi_g_dv_timings(struct v4l2_subdev *sd,
>> + struct v4l2_dv_timings *timings)
>> +{
>> + struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
>> + struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + *timings = hdmi->timings;
>> +
>> + mutex_unlock(&state->mutex);
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_hdmi_query_dv_timings(struct v4l2_subdev *sd,
>> + struct v4l2_dv_timings *timings)
>> +{
>> + struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
>> + struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
>> + struct v4l2_bt_timings *bt = &timings->bt;
>> + int pixelclock;
>> + int polarity;
>> +
>> + if (!timings)
>> + return -EINVAL;
>> +
>> + memset(timings, 0, sizeof(struct v4l2_dv_timings));
>> +
>> + if (!adv748x_hdmi_has_signal(state))
>> + return -ENOLINK;
>> +
>> + pixelclock = adv748x_hdmi_read_pixelclock(state);
>> + if (pixelclock < 0)
>> + return -ENODATA;
>> +
>> + timings->type = V4L2_DV_BT_656_1120;
>> +
>> + bt->pixelclock = pixelclock;
>> + bt->interlaced = hdmi_read(state, ADV748X_HDMI_F1H1) &
>> + ADV748X_HDMI_F1H1_INTERLACED ?
>> + V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
>> + bt->width = hdmi_read16(state, ADV748X_HDMI_LW1,
>> + ADV748X_HDMI_LW1_WIDTH_MASK);
>> + bt->height = hdmi_read16(state, ADV748X_HDMI_F0H1,
>> + ADV748X_HDMI_F0H1_HEIGHT_MASK);
>> + bt->hfrontporch = hdmi_read16(state, ADV748X_HDMI_HFRONT_PORCH,
>> + ADV748X_HDMI_HFRONT_PORCH_MASK);
>> + bt->hsync = hdmi_read16(state, ADV748X_HDMI_HSYNC_WIDTH,
>> + ADV748X_HDMI_HSYNC_WIDTH_MASK);
>> + bt->hbackporch = hdmi_read16(state, ADV748X_HDMI_HBACK_PORCH,
>> + ADV748X_HDMI_HBACK_PORCH_MASK);
>> + bt->vfrontporch = hdmi_read16(state, ADV748X_HDMI_VFRONT_PORCH,
>> + ADV748X_HDMI_VFRONT_PORCH_MASK) / 2;
>> + bt->vsync = hdmi_read16(state, ADV748X_HDMI_VSYNC_WIDTH,
>> + ADV748X_HDMI_VSYNC_WIDTH_MASK) / 2;
>> + bt->vbackporch = hdmi_read16(state, ADV748X_HDMI_VBACK_PORCH,
>> + ADV748X_HDMI_VBACK_PORCH_MASK) / 2;
>> +
>> +
>> + polarity = hdmi_read(state, 0x05);
>> + bt->polarities = (polarity & BIT(4) ? V4L2_DV_VSYNC_POS_POL : 0) |
>> + (polarity & BIT(5) ? V4L2_DV_HSYNC_POS_POL : 0);
>> +
>> + if (bt->interlaced == V4L2_DV_INTERLACED) {
>> + bt->height += hdmi_read16(state, 0x0b, 0x1fff);
>> + bt->il_vfrontporch = hdmi_read16(state, 0x2c, 0x3fff) / 2;
>> + bt->il_vsync = hdmi_read16(state, 0x30, 0x3fff) / 2;
>> + bt->il_vbackporch = hdmi_read16(state, 0x34, 0x3fff) / 2;
>> + }
>> +
>> + adv748x_fill_optional_dv_timings(timings);
>> +
>> + /*
>> + * No interrupt handling is implemented yet.
>> + * There should be an IRQ when a cable is plugged and the new timings
>> + * should be figured out and stored to state.
>> + */
>> + hdmi->timings = *timings;
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_hdmi_g_input_status(struct v4l2_subdev *sd, u32 *status)
>> +{
>> + struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
>> + struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + *status = adv748x_hdmi_has_signal(state) ? 0 : V4L2_IN_ST_NO_SIGNAL;
>
> It would be nice if this could be a bit more detailed. Esp. being able to tell the
> difference between whether or not there is a signal, and whether or not the
> signal is stable (i.e. has sync).

Ack.

>
>> +
>> + mutex_unlock(&state->mutex);
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_hdmi_s_stream(struct v4l2_subdev *sd, int enable)
>> +{
>> + struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
>> + struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
>> + int ret;
>> +
>> + mutex_lock(&state->mutex);
>> +
>> + ret = adv748x_txa_power(state, enable);
>> + if (ret)
>> + goto done;
>> +
>> + if (adv748x_hdmi_has_signal(state))
>> + adv_dbg(state, "Detected HDMI signal\n");
>> + else
>> + adv_dbg(state, "Couldn't detect HDMI video signal\n");
>> +
>> +done:
>> + mutex_unlock(&state->mutex);
>> + return ret;
>> +}
>> +
>> +static int adv748x_hdmi_g_pixelaspect(struct v4l2_subdev *sd,
>> + struct v4l2_fract *aspect)
>> +{
>> + aspect->numerator = 1;
>> + aspect->denominator = 1;
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_subdev_video_ops adv748x_video_ops_hdmi = {
>> + .s_dv_timings = adv748x_hdmi_s_dv_timings,
>> + .g_dv_timings = adv748x_hdmi_g_dv_timings,
>> + .query_dv_timings = adv748x_hdmi_query_dv_timings,
>> + .g_input_status = adv748x_hdmi_g_input_status,
>> + .s_stream = adv748x_hdmi_s_stream,
>> + .g_pixelaspect = adv748x_hdmi_g_pixelaspect,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_pad_ops
>> + */
>> +
>> +static int adv748x_hdmi_set_pixelrate(struct adv748x_hdmi *hdmi)
>> +{
>> + struct v4l2_subdev *tx;
>> + struct v4l2_dv_timings timings;
>> + struct v4l2_bt_timings *bt = &timings.bt;
>> + unsigned int fps;
>> +
>> + tx = adv748x_get_remote_sd(&hdmi->pads[ADV748X_HDMI_SOURCE]);
>> + if (!tx)
>> + return -ENOLINK;
>> +
>> + adv748x_hdmi_query_dv_timings(&hdmi->sd, &timings);
>> +
>> + fps = DIV_ROUND_CLOSEST(bt->pixelclock,
>> + V4L2_DV_BT_FRAME_WIDTH(bt) *
>> + V4L2_DV_BT_FRAME_HEIGHT(bt));
>> +
>> + return adv748x_csi2_set_pixelrate(tx, bt->width * bt->height * fps);
>> +}
>> +
>> +static int adv748x_hdmi_enum_mbus_code(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_mbus_code_enum *code)
>> +{
>> + if (code->index != 0)
>> + return -EINVAL;
>> +
>> + code->code = MEDIA_BUS_FMT_RGB888_1X24;
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_hdmi_get_format(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_format *sdformat)
>> +{
>> + struct adv748x_hdmi *hdmi = adv748x_sd_to_hdmi(sd);
>> + struct v4l2_mbus_framefmt *mbusformat;
>> +
>> + if (sdformat->pad != ADV748X_HDMI_SOURCE)
>> + return -EINVAL;
>> +
>> + if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY) {
>> + mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
>> + sdformat->format = *mbusformat;
>> + } else {
>> + adv748x_hdmi_fill_format(hdmi, &sdformat->format);
>> + adv748x_hdmi_set_pixelrate(hdmi);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int adv748x_hdmi_set_format(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_format *sdformat)
>> +{
>> + struct v4l2_mbus_framefmt *mbusformat;
>> +
>> + if (sdformat->pad != ADV748X_HDMI_SOURCE)
>> + return -EINVAL;
>> +
>> + if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
>> + return adv748x_hdmi_get_format(sd, cfg, sdformat);
>> +
>> + mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
>> + *mbusformat = sdformat->format;
>> +
>> + return 0;
>> +}
>> +
>> +static bool adv748x_hdmi_check_dv_timings(const struct v4l2_dv_timings *timings,
>> + void *hdl)
>> +{
>> + const struct adv748x_hdmi_video_standards *stds =
>> + adv748x_hdmi_video_standards;
>> + unsigned int i;
>> +
>> + for (i = 0; stds[i].timings.bt.width; i++)
>> + if (v4l2_match_dv_timings(timings, &stds[i].timings, 0, false))
>> + return true;
>> +
>> + return false;
>> +}
>> +
>> +static int adv748x_hdmi_enum_dv_timings(struct v4l2_subdev *sd,
>> + struct v4l2_enum_dv_timings *timings)
>> +{
>> + return v4l2_enum_dv_timings_cap(timings, &adv748x_hdmi_timings_cap,
>> + adv748x_hdmi_check_dv_timings, NULL);
>> +}
>> +
>> +static int adv748x_hdmi_dv_timings_cap(struct v4l2_subdev *sd,
>> + struct v4l2_dv_timings_cap *cap)
>> +{
>> + *cap = adv748x_hdmi_timings_cap;
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_subdev_pad_ops adv748x_pad_ops_hdmi = {
>> + .enum_mbus_code = adv748x_hdmi_enum_mbus_code,
>> + .set_fmt = adv748x_hdmi_set_format,
>> + .get_fmt = adv748x_hdmi_get_format,
>> + .dv_timings_cap = adv748x_hdmi_dv_timings_cap,
>> + .enum_dv_timings = adv748x_hdmi_enum_dv_timings,
>
> No get/set_edid ops? How can you use HDMI without having these ops?

-EWORKSFORME.

Just kidding ...
The input devices I have connected just work it would seem.

As far as I can tell, the default EDID map from the hardware is basically a zero
table - but with the hardware providing a valid checksum to state that it's OK
or something...

The input devices I have just output a configured signal regardless perhaps.

I've now implemented and tested EDID support. I'm using a custom utility from
Laurent to program the EDID through the subdev directly.

(It would be nice to be able to use v4l2-ctl here, so that's on my radar - but I
don't have time right now ).

>
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * v4l2_subdev_ops
>> + */
>> +
>> +static const struct v4l2_subdev_ops adv748x_ops_hdmi = {
>> + .video = &adv748x_video_ops_hdmi,
>> + .pad = &adv748x_pad_ops_hdmi,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Controls
>> + */
>> +
>> +static const char * const hdmi_ctrl_patgen_menu[] = {
>> + "Disabled",
>> + "Plain Blue",
>
> I'd say just "Blue" or possibly "Solid Blue".

Ok, again - that text is directly from the data sheet.
This one isn't configurable though AFAICS

>
>> + "Color Bars",
>> + "Ramp Grey",
>> + "Ramp Blue",
>> + "Ramp Red",

This actually bugged me as they've inverted the location of the word 'Ramp' here
vs AFE ...

>> + "Checkered"
>
> I assume this is a black and white pattern? If so, say: "B&W Checkered"

I can't remember so I'll reload it and see - then set as appropriate.

>
>> +};
>> +
>> +static int adv748x_hdmi_s_ctrl(struct v4l2_ctrl *ctrl)
>> +{
>> + struct adv748x_hdmi *hdmi = adv748x_ctrl_to_hdmi(ctrl);
>> + struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
>> + int ret;
>> + u8 pattern;
>> +
>> + /* Enable video adjustment first */
>> + ret = cp_clrset(state, ADV748X_CP_VID_ADJ,
>> + ADV748X_CP_VID_ADJ_ENABLE,
>> + ADV748X_CP_VID_ADJ_ENABLE);
>> + if (ret < 0)
>> + return ret;
>> +
>> + switch (ctrl->id) {
>> + case V4L2_CID_BRIGHTNESS:
>> + ret = cp_write(state, ADV748X_CP_BRI, ctrl->val);
>> + break;
>> + case V4L2_CID_HUE:
>> + ret = cp_write(state, ADV748X_CP_HUE, ctrl->val);
>> + break;
>> + case V4L2_CID_CONTRAST:
>> + ret = cp_write(state, ADV748X_CP_CON, ctrl->val);
>> + break;
>> + case V4L2_CID_SATURATION:
>> + ret = cp_write(state, ADV748X_CP_SAT, ctrl->val);
>> + break;
>> + case V4L2_CID_TEST_PATTERN:
>> + pattern = ctrl->val;
>> +
>> + /* Pattern is 0-indexed. Ctrl Menu is 1-indexed */
>> + if (pattern) {
>> + pattern--;
>> + pattern |= ADV748X_CP_PAT_GEN_EN;
>> + }
>> +
>> + ret = cp_write(state, ADV748X_CP_PAT_GEN, pattern);
>> +
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static const struct v4l2_ctrl_ops adv748x_hdmi_ctrl_ops = {
>> + .s_ctrl = adv748x_hdmi_s_ctrl,
>> +};
>> +
>> +static int adv748x_hdmi_init_controls(struct adv748x_hdmi *hdmi)
>> +{
>> + struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
>> +
>> + v4l2_ctrl_handler_init(&hdmi->ctrl_hdl, 5);
>> +
>> + /* Use our mutex for the controls */
>> + hdmi->ctrl_hdl.lock = &state->mutex;
>> +
>> + v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
>> + V4L2_CID_BRIGHTNESS, ADV748X_CP_BRI_MIN,
>> + ADV748X_CP_BRI_MAX, 1, ADV748X_CP_BRI_DEF);
>> + v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
>> + V4L2_CID_CONTRAST, ADV748X_CP_CON_MIN,
>> + ADV748X_CP_CON_MAX, 1, ADV748X_CP_CON_DEF);
>> + v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
>> + V4L2_CID_SATURATION, ADV748X_CP_SAT_MIN,
>> + ADV748X_CP_SAT_MAX, 1, ADV748X_CP_SAT_DEF);
>> + v4l2_ctrl_new_std(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
>> + V4L2_CID_HUE, ADV748X_CP_HUE_MIN,
>> + ADV748X_CP_HUE_MAX, 1, ADV748X_CP_HUE_DEF);
>
> You should implement the V4L2_CID_DV_RX_POWER_PRESENT control as well,
> once interrupts are working.
>
> Perhaps add a comment as a reminder?

I have a separate patch where I've started looking at interrupts, but I've put a
comment in here too.

Is this just to provide connection hotplug events to userspace?

>
>> +
>> + v4l2_ctrl_new_std_menu_items(&hdmi->ctrl_hdl, &adv748x_hdmi_ctrl_ops,
>> + V4L2_CID_TEST_PATTERN,
>> + ARRAY_SIZE(hdmi_ctrl_patgen_menu) - 1,
>> + 0, 0, hdmi_ctrl_patgen_menu);
>> +
>> + hdmi->sd.ctrl_handler = &hdmi->ctrl_hdl;
>> + if (hdmi->ctrl_hdl.error) {
>> + v4l2_ctrl_handler_free(&hdmi->ctrl_hdl);
>> + return hdmi->ctrl_hdl.error;
>> + }
>> +
>> + return v4l2_ctrl_handler_setup(&hdmi->ctrl_hdl);
>> +}
>> +
>> +int adv748x_hdmi_init(struct adv748x_hdmi *hdmi)
>> +{
>> + struct adv748x_state *state = adv748x_hdmi_to_state(hdmi);
>> + static const struct v4l2_dv_timings cea720x480 =
>> + V4L2_DV_BT_CEA_720X480I59_94;
>> + int ret;
>> +
>> + hdmi->timings = cea720x480;
>> +
>> + adv748x_subdev_init(&hdmi->sd, state, &adv748x_ops_hdmi,
>> + MEDIA_ENT_F_IO_DTV, "hdmi");
>> +
>> + hdmi->pads[ADV748X_HDMI_SINK].flags = MEDIA_PAD_FL_SINK;
>> + hdmi->pads[ADV748X_HDMI_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
>> +
>> + ret = media_entity_pads_init(&hdmi->sd.entity,
>> + ADV748X_HDMI_NR_PADS, hdmi->pads);
>> + if (ret)
>> + return ret;
>> +
>> + ret = adv748x_hdmi_init_controls(hdmi);
>> + if (ret)
>> + goto err_free_media;
>> +
>> + return 0;
>> +
>> +err_free_media:
>> + media_entity_cleanup(&hdmi->sd.entity);
>> +
>> + return ret;
>> +}
>> +
>> +void adv748x_hdmi_cleanup(struct adv748x_hdmi *hdmi)
>> +{
>> + v4l2_device_unregister_subdev(&hdmi->sd);
>> + media_entity_cleanup(&hdmi->sd.entity);
>> + v4l2_ctrl_handler_free(&hdmi->ctrl_hdl);
>> +}
>> diff --git a/drivers/media/i2c/adv748x/adv748x.h
>> b/drivers/media/i2c/adv748x/adv748x.h
>> new file mode 100644
>> index 000000000000..2f36e5052f08
>> --- /dev/null
>> +++ b/drivers/media/i2c/adv748x/adv748x.h
>> @@ -0,0 +1,415 @@
>> +/*
>> + * Driver for Analog Devices ADV748X video decoder and HDMI receiver
>> + *
>> + * Copyright (C) 2017 Renesas Electronics Corp.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms of the GNU General Public License as published by the
>> + * Free Software Foundation; either version 2 of the License, or (at your
>> + * option) any later version.
>> + *
>> + * Authors:
>> + * Koji Matsuoka <koji.matsuoka.xm@xxxxxxxxxxx>
>> + * Niklas SÃderlund <niklas.soderlund@xxxxxxxxxxxx>
>> + * Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
>> + *
>> + * The ADV748x range of receivers have the following configurations:
>> + *
>> + * Analog HDMI MHL 4-Lane 1-Lane
>> + * In In CSI CSI
>> + * ADV7480 X X X
>> + * ADV7481 X X X X X
>> + * ADV7482 X X X X
>> + */
>> +
>> +#include <linux/i2c.h>
>> +
>> +#ifndef _ADV748X_H_
>> +#define _ADV748X_H_
>> +
>> +/* I2C slave addresses */
>> +#define ADV748X_I2C_IO 0x70 /* IO Map */
>> +#define ADV748X_I2C_DPLL 0x26 /* DPLL Map */
>> +#define ADV748X_I2C_CP 0x22 /* CP Map */
>> +#define ADV748X_I2C_HDMI 0x34 /* HDMI Map */
>> +#define ADV748X_I2C_EDID 0x36 /* EDID Map */
>> +#define ADV748X_I2C_REPEATER 0x32 /* HDMI RX Repeater Map */
>> +#define ADV748X_I2C_INFOFRAME 0x31 /* HDMI RX InfoFrame Map */
>> +#define ADV748X_I2C_CEC 0x41 /* CEC Map */
>> +#define ADV748X_I2C_SDP 0x79 /* SDP Map */
>> +#define ADV748X_I2C_TXB 0x48 /* CSI-TXB Map */
>> +#define ADV748X_I2C_TXA 0x4a /* CSI-TXA Map */
>> +
>> +enum adv748x_page {
>> + ADV748X_PAGE_IO,
>> + ADV748X_PAGE_DPLL,
>> + ADV748X_PAGE_CP,
>> + ADV748X_PAGE_HDMI,
>> + ADV748X_PAGE_EDID,
>> + ADV748X_PAGE_REPEATER,
>> + ADV748X_PAGE_INFOFRAME,
>> + ADV748X_PAGE_CEC,
>> + ADV748X_PAGE_SDP,
>> + ADV748X_PAGE_TXB,
>> + ADV748X_PAGE_TXA,
>> + ADV748X_PAGE_MAX,
>> +
>> + /* Fake pages for register sequences */
>> + ADV748X_PAGE_WAIT, /* Wait x msec */
>> + ADV748X_PAGE_EOR, /* End Mark */
>> +};
>> +
>> +/**
>> + * enum adv748x_ports - Device tree port number definitions
>> + *
>> + * The ADV748X ports define the mapping between subdevices
>> + * and the device tree specification
>> + */
>> +enum adv748x_ports {
>> + ADV748X_PORT_AIN0 = 0,
>> + ADV748X_PORT_AIN1 = 1,
>> + ADV748X_PORT_AIN2 = 2,
>> + ADV748X_PORT_AIN3 = 3,
>> + ADV748X_PORT_AIN4 = 4,
>> + ADV748X_PORT_AIN5 = 5,
>> + ADV748X_PORT_AIN6 = 6,
>> + ADV748X_PORT_AIN7 = 7,
>> + ADV748X_PORT_HDMI = 8,
>> + ADV748X_PORT_TTL = 9,
>> + ADV748X_PORT_TXA = 10,
>> + ADV748X_PORT_TXB = 11,
>> + ADV748X_PORT_MAX = 12,
>> +};
>> +
>> +enum adv748x_csi2_pads {
>> + ADV748X_CSI2_SINK,
>> + ADV748X_CSI2_SOURCE,
>> + ADV748X_CSI2_NR_PADS,
>> +};
>> +
>> +/* CSI2 transmitters can have 2 internal connections, HDMI/AFE */
>> +#define ADV748X_CSI2_MAX_SUBDEVS 2
>> +
>> +struct adv748x_csi2 {
>> + struct adv748x_state *state;
>> + struct v4l2_mbus_framefmt format;
>> + unsigned int page;
>> +
>> + struct media_pad pads[ADV748X_CSI2_NR_PADS];
>> + struct v4l2_ctrl_handler ctrl_hdl;
>> + struct v4l2_subdev sd;
>> +};
>> +
>> +#define notifier_to_csi2(n) container_of(n, struct adv748x_csi2, notifier)
>> +#define adv748x_sd_to_csi2(sd) container_of(sd, struct adv748x_csi2, sd)
>> +
>> +enum adv748x_hdmi_pads {
>> + ADV748X_HDMI_SINK,
>> + ADV748X_HDMI_SOURCE,
>> + ADV748X_HDMI_NR_PADS,
>> +};
>> +
>> +struct adv748x_hdmi {
>> + struct media_pad pads[ADV748X_HDMI_NR_PADS];
>> + struct v4l2_ctrl_handler ctrl_hdl;
>> + struct v4l2_subdev sd;
>> + struct v4l2_mbus_framefmt format;
>> +
>> + struct v4l2_dv_timings timings;
>> +};
>> +
>> +#define adv748x_ctrl_to_hdmi(ctrl) \
>> + container_of(ctrl->handler, struct adv748x_hdmi, ctrl_hdl)
>> +#define adv748x_sd_to_hdmi(sd) container_of(sd, struct adv748x_hdmi, sd)
>> +
>> +enum adv748x_afe_pads {
>> + ADV748X_AFE_SINK_AIN0,
>> + ADV748X_AFE_SINK_AIN1,
>> + ADV748X_AFE_SINK_AIN2,
>> + ADV748X_AFE_SINK_AIN3,
>> + ADV748X_AFE_SINK_AIN4,
>> + ADV748X_AFE_SINK_AIN5,
>> + ADV748X_AFE_SINK_AIN6,
>> + ADV748X_AFE_SINK_AIN7,
>> + ADV748X_AFE_SOURCE,
>> + ADV748X_AFE_NR_PADS,
>> +};
>> +
>> +struct adv748x_afe {
>> + struct media_pad pads[ADV748X_AFE_NR_PADS];
>> + struct v4l2_ctrl_handler ctrl_hdl;
>> + struct v4l2_subdev sd;
>> + struct v4l2_mbus_framefmt format;
>> +
>> + bool streaming;
>> + v4l2_std_id curr_norm;
>> + unsigned int input;
>> +};
>> +
>> +#define adv748x_ctrl_to_afe(ctrl) \
>> + container_of(ctrl->handler, struct adv748x_afe, ctrl_hdl)
>> +#define adv748x_sd_to_afe(sd) container_of(sd, struct adv748x_afe, sd)
>> +
>> +/**
>> + * struct adv748x_state - State of ADV748X
>> + * @dev: (OF) device
>> + * @client: I2C client
>> + * @mutex: protect global state
>> + *
>> + * @endpoints: parsed device node endpoints for each port
>> + *
>> + * @i2c_addresses I2C Page addresses
>> + * @i2c_clients I2C clients for the page accesses
>> + * @regmap regmap configuration pages.
>> + *
>> + * @hdmi: state of HDMI receiver context
>> + * @afe: state of AFE receiver context
>> + * @txa: state of TXA transmitter context
>> + * @txb: state of TXB transmitter context
>> + */
>> +struct adv748x_state {
>> + struct device *dev;
>> + struct i2c_client *client;
>> + struct mutex mutex;
>> +
>> + struct device_node *endpoints[ADV748X_PORT_MAX];
>> +
>> + struct i2c_client *i2c_clients[ADV748X_PAGE_MAX];
>> + struct regmap *regmap[ADV748X_PAGE_MAX];
>> +
>> + struct adv748x_hdmi hdmi;
>> + struct adv748x_afe afe;
>> + struct adv748x_csi2 txa;
>> + struct adv748x_csi2 txb;
>> +};
>> +
>> +#define adv748x_hdmi_to_state(h) container_of(h, struct adv748x_state, hdmi)
>> +#define adv748x_afe_to_state(a) container_of(a, struct adv748x_state, afe)
>> +
>> +#define adv_err(a, fmt, arg...) dev_err(a->dev, fmt, ##arg)
>> +#define adv_info(a, fmt, arg...) dev_info(a->dev, fmt, ##arg)
>> +#define adv_dbg(a, fmt, arg...) dev_dbg(a->dev, fmt, ##arg)
>> +
>> +/* Register Mappings */
>> +
>> +/* IO Map */
>> +#define ADV748X_IO_PD 0x00 /* power down controls */
>> +#define ADV748X_IO_PD_RX_EN BIT(6)
>> +
>> +#define ADV748X_IO_REG_04 0x04
>> +#define ADV748X_IO_REG_04_FORCE_FR BIT(0) /* Force CP free-run */
>> +
>> +#define ADV748X_IO_DATAPATH 0x03 /* datapath cntrl */
>> +#define ADV748X_IO_DATAPATH_VFREQ_M 0x70
>> +#define ADV748X_IO_DATAPATH_VFREQ_SHIFT 4
>> +
>> +#define ADV748X_IO_VID_STD 0x05
>> +
>> +#define ADV748X_IO_10 0x10 /* io_reg_10 */
>> +#define ADV748X_IO_10_CSI4_EN BIT(7)
>> +#define ADV748X_IO_10_CSI1_EN BIT(6)
>> +#define ADV748X_IO_10_PIX_OUT_EN BIT(5)
>> +
>> +#define ADV748X_IO_CHIP_REV_ID_1 0xdf
>> +#define ADV748X_IO_CHIP_REV_ID_2 0xe0
>> +
>> +#define ADV748X_IO_SLAVE_ADDR_BASE 0xf2
>> +
>> +/* HDMI RX Map */
>> +#define ADV748X_HDMI_LW1 0x07 /* line width_1 */
>> +#define ADV748X_HDMI_LW1_VERT_FILTER BIT(7)
>> +#define ADV748X_HDMI_LW1_DE_REGEN BIT(5)
>> +#define ADV748X_HDMI_LW1_WIDTH_MASK 0x1fff
>> +
>> +#define ADV748X_HDMI_F0H1 0x09 /* field0 height_1 */
>> +#define ADV748X_HDMI_F0H1_HEIGHT_MASK 0x1fff
>> +
>> +#define ADV748X_HDMI_F1H1 0x0b /* field1 height_1 */
>> +#define ADV748X_HDMI_F1H1_INTERLACED BIT(5)
>> +
>> +#define ADV748X_HDMI_HFRONT_PORCH 0x20 /* hsync_front_porch_1 */
>> +#define ADV748X_HDMI_HFRONT_PORCH_MASK 0x1fff
>> +
>> +#define ADV748X_HDMI_HSYNC_WIDTH 0x22 /* hsync_pulse_width_1 */
>> +#define ADV748X_HDMI_HSYNC_WIDTH_MASK 0x1fff
>> +
>> +#define ADV748X_HDMI_HBACK_PORCH 0x24 /* hsync_back_porch_1 */
>> +#define ADV748X_HDMI_HBACK_PORCH_MASK 0x1fff
>> +
>> +#define ADV748X_HDMI_VFRONT_PORCH 0x2a /* field0_vs_front_porch_1 */
>> +#define ADV748X_HDMI_VFRONT_PORCH_MASK 0x3fff
>> +
>> +#define ADV748X_HDMI_VSYNC_WIDTH 0x2e /* field0_vs_pulse_width_1 */
>> +#define ADV748X_HDMI_VSYNC_WIDTH_MASK 0x3fff
>> +
>> +#define ADV748X_HDMI_VBACK_PORCH 0x32 /* field0_vs_back_porch_1 */
>> +#define ADV748X_HDMI_VBACK_PORCH_MASK 0x3fff
>> +
>> +#define ADV748X_HDMI_TMDS_1 0x51 /* hdmi_reg_51 */
>> +#define ADV748X_HDMI_TMDS_2 0x52 /* hdmi_reg_52 */
>> +
>> +/* SDP Main Map */
>> +#define ADV748X_SDP_INSEL 0x00 /* user_map_rw_reg_00 */
>> +
>> +#define ADV748X_SDP_VID_SEL 0x02 /* user_map_rw_reg_02 */
>> +#define ADV748X_SDP_VID_SEL_MASK 0xf0
>> +#define ADV748X_SDP_VID_SEL_SHIFT 4
>> +
>> +/* Contrast - Unsigned*/
>> +#define ADV748X_SDP_CON 0x08 /* user_map_rw_reg_08 */
>> +#define ADV748X_SDP_CON_MIN 0
>> +#define ADV748X_SDP_CON_DEF 128
>> +#define ADV748X_SDP_CON_MAX 255
>> +
>> +/* Brightness - Signed */
>> +#define ADV748X_SDP_BRI 0x0a /* user_map_rw_reg_0a */
>> +#define ADV748X_SDP_BRI_MIN -128
>> +#define ADV748X_SDP_BRI_DEF 0
>> +#define ADV748X_SDP_BRI_MAX 127
>> +
>> +/* Hue - Signed, inverted*/
>> +#define ADV748X_SDP_HUE 0x0b /* user_map_rw_reg_0b */
>> +#define ADV748X_SDP_HUE_MIN -127
>> +#define ADV748X_SDP_HUE_DEF 0
>> +#define ADV748X_SDP_HUE_MAX 128
>> +
>> +/* Test Patterns / Default Values */
>> +#define ADV748X_SDP_DEF 0x0c /* user_map_rw_reg_0c */
>> +#define ADV748X_SDP_DEF_VAL_EN BIT(0) /* Force free run mode */
>> +#define ADV748X_SDP_DEF_VAL_AUTO_EN BIT(1) /* Free run when no signal */
>> +
>> +#define ADV748X_SDP_MAP_SEL 0x0e /* user_map_rw_reg_0e */
>> +#define ADV748X_SDP_MAP_SEL_RO_MAIN 1
>> +
>> +/* Free run pattern select */
>> +#define ADV748X_SDP_FRP 0x14
>> +#define ADV748X_SDP_FRP_MASK GENMASK(3, 1)
>> +
>> +/* Saturation */
>> +#define ADV748X_SDP_SD_SAT_U 0xe3 /* user_map_rw_reg_e3 */
>> +#define ADV748X_SDP_SD_SAT_V 0xe4 /* user_map_rw_reg_e4 */
>> +#define ADV748X_SDP_SAT_MIN 0
>> +#define ADV748X_SDP_SAT_DEF 128
>> +#define ADV748X_SDP_SAT_MAX 255
>> +
>> +/* SDP RO Main Map */
>> +#define ADV748X_SDP_RO_10 0x10
>> +#define ADV748X_SDP_RO_10_IN_LOCK BIT(0)
>> +
>> +/* CP Map */
>> +#define ADV748X_CP_PAT_GEN 0x37 /* int_pat_gen_1 */
>> +#define ADV748X_CP_PAT_GEN_EN BIT(7)
>> +
>> +/* Contrast Control - Unsigned */
>> +#define ADV748X_CP_CON 0x3a /* contrast_cntrl */
>> +#define ADV748X_CP_CON_MIN 0 /* Minimum contrast */
>> +#define ADV748X_CP_CON_DEF 128 /* Default */
>> +#define ADV748X_CP_CON_MAX 255 /* Maximum contrast */
>> +
>> +/* Saturation Control - Unsigned */
>> +#define ADV748X_CP_SAT 0x3b /* saturation_cntrl */
>> +#define ADV748X_CP_SAT_MIN 0 /* Minimum saturation */
>> +#define ADV748X_CP_SAT_DEF 128 /* Default */
>> +#define ADV748X_CP_SAT_MAX 255 /* Maximum saturation */
>> +
>> +/* Brightness Control - Signed */
>> +#define ADV748X_CP_BRI 0x3c /* brightness_cntrl */
>> +#define ADV748X_CP_BRI_MIN -128 /* Luma is -512d */
>> +#define ADV748X_CP_BRI_DEF 0 /* Luma is 0 */
>> +#define ADV748X_CP_BRI_MAX 127 /* Luma is 508d */
>> +
>> +/* Hue Control */
>> +#define ADV748X_CP_HUE 0x3d /* hue_cntrl */
>> +#define ADV748X_CP_HUE_MIN 0 /* -90 degree */
>> +#define ADV748X_CP_HUE_DEF 0 /* -90 degree */
>> +#define ADV748X_CP_HUE_MAX 255 /* +90 degree */
>> +
>> +#define ADV748X_CP_VID_ADJ 0x3e /* vid_adj_0 */
>> +#define ADV748X_CP_VID_ADJ_ENABLE BIT(7) /* Enable colour controls */
>> +
>> +#define ADV748X_CP_DE_POS_HIGH 0x8b /* de_pos_adj_6 */
>> +#define ADV748X_CP_DE_POS_HIGH_SET BIT(6)
>> +#define ADV748X_CP_DE_POS_END_LOW 0x8c /* de_pos_adj_7 */
>> +#define ADV748X_CP_DE_POS_START_LOW 0x8d /* de_pos_adj_8 */
>> +
>> +#define ADV748X_CP_VID_ADJ_2 0x91
>> +#define ADV748X_CP_VID_ADJ_2_INTERLACED BIT(6)
>> +#define ADV748X_CP_VID_ADJ_2_INTERLACED_3D BIT(4)
>> +
>> +#define ADV748X_CP_CLMP_POS 0xc9 /* clmp_pos_cntrl_4 */
>> +#define ADV748X_CP_CLMP_POS_DIS_AUTO BIT(0) /* dis_auto_param_buff */
>> +
>> +/* CSI : TXA/TXB Maps */
>> +#define ADV748X_CSI_VC_REF 0x0d /* csi_tx_top_reg_0d */
>> +#define ADV748X_CSI_VC_REF_SHIFT 6
>> +
>> +#define ADV748X_CSI_FS_AS_LS 0x1e /* csi_tx_top_reg_1e */
>> +#define ADV748X_CSI_FS_AS_LS_UNKNOWN BIT(6) /* Undocumented bit */
>> +
>> +/* Register handling */
>> +
>> +int adv748x_read(struct adv748x_state *state, u8 addr, u8 reg);
>> +int adv748x_write(struct adv748x_state *state, u8 page, u8 reg, u8 value);
>> +int adv748x_write_block(struct adv748x_state *state, int client_page,
>> + unsigned int init_reg, const void *val,
>> + size_t val_len);
>> +
>> +#define io_read(s, r) adv748x_read(s, ADV748X_PAGE_IO, r)
>> +#define io_write(s, r, v) adv748x_write(s, ADV748X_PAGE_IO, r, v)
>> +#define io_clrset(s, r, m, v) io_write(s, r, (io_read(s, r) & ~m) | v)
>> +
>> +#define hdmi_read(s, r) adv748x_read(s, ADV748X_PAGE_HDMI, r)
>> +#define hdmi_read16(s, r, m) (((hdmi_read(s, r) << 8) | hdmi_read(s, r+1)) & m)
>> +#define hdmi_write(s, r, v) adv748x_write(s, ADV748X_PAGE_HDMI, r, v)
>> +#define hdmi_clrset(s, r, m, v) hdmi_write(s, r, (hdmi_read(s, r) & ~m) | v)
>> +
>> +#define sdp_read(s, r) adv748x_read(s, ADV748X_PAGE_SDP, r)
>> +#define sdp_write(s, r, v) adv748x_write(s, ADV748X_PAGE_SDP, r, v)
>> +#define sdp_clrset(s, r, m, v) sdp_write(s, r, (sdp_read(s, r) & ~m) | v)
>> +
>> +#define cp_read(s, r) adv748x_read(s, ADV748X_PAGE_CP, r)
>> +#define cp_write(s, r, v) adv748x_write(s, ADV748X_PAGE_CP, r, v)
>> +#define cp_clrset(s, r, m, v) cp_write(s, r, (cp_read(s, r) & ~m) | v)
>> +
>> +#define txa_read(s, r) adv748x_read(s, ADV748X_PAGE_TXA, r)
>> +#define txa_write(s, r, v) adv748x_write(s, ADV748X_PAGE_TXA, r, v)
>> +#define txa_clrset(s, r, m, v) txa_write(s, r, (txa_read(s, r) & ~m) | v)
>> +
>> +#define txb_read(s, r) adv748x_read(s, ADV748X_PAGE_TXB, r)
>> +#define txb_write(s, r, v) adv748x_write(s, ADV748X_PAGE_TXB, r, v)
>> +#define txb_clrset(s, r, m, v) txb_write(s, r, (txb_read(s, r) & ~m) | v)
>> +
>> +#define tx_read(t, r) adv748x_read(t->state, t->page, r)
>> +#define tx_write(t, r, v) adv748x_write(t->state, t->page, r, v)
>> +#define tx_clrset(t, r, m, v) tx_write(t, r, (tx_read(t, r) & ~m) | v)
>> +
>> +static inline struct v4l2_subdev *adv748x_get_remote_sd(struct media_pad *pad)
>> +{
>> + pad = media_entity_remote_pad(pad);
>> + if (!pad)
>> + return NULL;
>> +
>> + return media_entity_to_v4l2_subdev(pad->entity);
>> +}
>> +
>> +void adv748x_subdev_init(struct v4l2_subdev *sd, struct adv748x_state *state,
>> + const struct v4l2_subdev_ops *ops, u32 function,
>> + const char *ident);
>> +
>> +int adv748x_register_subdevs(struct adv748x_state *state,
>> + struct v4l2_device *v4l2_dev);
>> +
>> +int adv748x_txa_power(struct adv748x_state *state, bool on);
>> +int adv748x_txb_power(struct adv748x_state *state, bool on);
>> +
>> +int adv748x_afe_init(struct adv748x_afe *afe);
>> +void adv748x_afe_cleanup(struct adv748x_afe *afe);
>> +
>> +int adv748x_csi2_init(struct adv748x_state *state, struct adv748x_csi2 *tx);
>> +void adv748x_csi2_cleanup(struct adv748x_csi2 *tx);
>> +int adv748x_csi2_set_pixelrate(struct v4l2_subdev *sd, s64 rate);
>> +
>> +int adv748x_hdmi_init(struct adv748x_hdmi *hdmi);
>> +void adv748x_hdmi_cleanup(struct adv748x_hdmi *hdmi);
>> +
>> +#endif /* _ADV748X_H_ */
>>
>
> Regards,
>
> Hans

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