Re: [PATCH v3 4/6] drm: bridge: dw-hdmi: Switch to V4L bus format and encodings

From: Neil Armstrong
Date: Wed Mar 08 2017 - 07:37:56 EST

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On 03/07/2017 06:35 PM, Jose Abreu wrote:
> Hi Neil,
>
>
> On 07-03-2017 16:42, Neil Armstrong wrote:
>> Some display pipelines can only provide non-RBG input pixels to the HDMI TX
>> Controller, this patch takes the pixel format from the plat_data if provided.
>>
>> Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
>> ---
>> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 322 +++++++++++++++++++++---------
>> include/drm/bridge/dw_hdmi.h | 63 ++++++
>> 2 files changed, 290 insertions(+), 95 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> index 1ed8bc1..348311c 100644
>> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> @@ -30,17 +30,14 @@
>> #include <drm/drm_encoder_slave.h>
>> #include <drm/bridge/dw_hdmi.h>
>>
>> +#include <uapi/linux/media-bus-format.h>
>> +#include <uapi/linux/videodev2.h>
>> +
>> #include "dw-hdmi.h"
>> #include "dw-hdmi-audio.h"
>>
>> #define HDMI_EDID_LEN 512
>>
>> -#define RGB 0
>> -#define YCBCR444 1
>> -#define YCBCR422_16BITS 2
>> -#define YCBCR422_8BITS 3
>> -#define XVYCC444 4
>> -
>> enum hdmi_datamap {
>> RGB444_8B = 0x01,
>> RGB444_10B = 0x03,
>> @@ -94,10 +91,10 @@ struct hdmi_vmode {
>> };
>>
>> struct hdmi_data_info {
>> - unsigned int enc_in_format;
>> - unsigned int enc_out_format;
>> - unsigned int enc_color_depth;
>> - unsigned int colorimetry;
>> + unsigned int enc_in_bus_format;
>> + unsigned int enc_out_bus_format;
>> + unsigned int enc_in_encoding;
>> + unsigned int enc_out_encoding;
>> unsigned int pix_repet_factor;
>> unsigned int hdcp_enable;
>> struct hdmi_vmode video_mode;
>> @@ -557,6 +554,92 @@ void dw_hdmi_audio_disable(struct dw_hdmi *hdmi)
>> }
>> EXPORT_SYMBOL_GPL(dw_hdmi_audio_disable);
>>
>> +static bool hdmi_bus_fmt_is_rgb(unsigned int bus_format)
>> +{
>> + switch (bus_format) {
>> + case MEDIA_BUS_FMT_RGB888_1X24:
>> + case MEDIA_BUS_FMT_RGB101010_1X30:
>> + case MEDIA_BUS_FMT_RGB121212_1X36:
>> + case MEDIA_BUS_FMT_RGB161616_1X48:
>> + return true;
>> +
>> + default:
>> + return false;
>> + }
>> +}
>> +
>> +static bool hdmi_bus_fmt_is_yuv444(unsigned int bus_format)
>> +{
>> + switch (bus_format) {
>> + case MEDIA_BUS_FMT_YUV8_1X24:
>> + case MEDIA_BUS_FMT_YUV10_1X30:
>> + case MEDIA_BUS_FMT_YUV12_1X36:
>> + case MEDIA_BUS_FMT_YUV16_1X48:
>> + return true;
>> +
>> + default:
>> + return false;
>> + }
>> +}
>> +
>> +static bool hdmi_bus_fmt_is_yuv422(unsigned int bus_format)
>> +{
>> + switch (bus_format) {
>> + case MEDIA_BUS_FMT_UYVY8_1X16:
>> + case MEDIA_BUS_FMT_UYVY10_1X20:
>> + case MEDIA_BUS_FMT_UYVY12_1X24:
>> + return true;
>> +
>> + default:
>> + return false;
>> + }
>> +}
>> +
>> +static bool hdmi_bus_fmt_is_yuv420(unsigned int bus_format)
>> +{
>> + switch (bus_format) {
>> + case MEDIA_BUS_FMT_UYVY8_1_1X24:
>> + case MEDIA_BUS_FMT_UYVY10_1_1X30:
>> + case MEDIA_BUS_FMT_UYVY12_1_1X36:
>> + case MEDIA_BUS_FMT_UYVY16_1_1X48:
>> + return true;
>> +
>> + default:
>> + return false;
>> + }
>> +}
>> +
>> +static int hdmi_bus_fmt_color_depth(unsigned int bus_format)
>> +{
>> + switch (bus_format) {
>> + case MEDIA_BUS_FMT_RGB888_1X24:
>> + case MEDIA_BUS_FMT_YUV8_1X24:
>> + case MEDIA_BUS_FMT_UYVY8_1X16:
>> + case MEDIA_BUS_FMT_UYVY8_1_1X24:
>> + return 8;
>> +
>> + case MEDIA_BUS_FMT_RGB101010_1X30:
>> + case MEDIA_BUS_FMT_YUV10_1X30:
>> + case MEDIA_BUS_FMT_UYVY10_1X20:
>> + case MEDIA_BUS_FMT_UYVY10_1_1X30:
>> + return 10;
>> +
>> + case MEDIA_BUS_FMT_RGB121212_1X36:
>> + case MEDIA_BUS_FMT_YUV12_1X36:
>> + case MEDIA_BUS_FMT_UYVY12_1X24:
>> + case MEDIA_BUS_FMT_UYVY12_1_1X36:
>> + return 12;
>> +
>> + case MEDIA_BUS_FMT_RGB161616_1X48:
>> + case MEDIA_BUS_FMT_YUV16_1X48:
>> + case MEDIA_BUS_FMT_UYVY16_1_1X48:
>> + return 16;
>> +
>> + default:
>> + return 0;
>
> Maybe fallback to 8bpp in case of error as this is the most
> common supported.
>
>> + }
>> +}
>> +
>> /*
>> * this submodule is responsible for the video data synchronization.
>> * for example, for RGB 4:4:4 input, the data map is defined as
>> @@ -569,37 +652,45 @@ static void hdmi_video_sample(struct dw_hdmi *hdmi)
>> int color_format = 0;
>> u8 val;
>>
>> - if (hdmi->hdmi_data.enc_in_format == RGB) {
>> - if (hdmi->hdmi_data.enc_color_depth == 8)
>> - color_format = 0x01;
>> - else if (hdmi->hdmi_data.enc_color_depth == 10)
>> - color_format = 0x03;
>> - else if (hdmi->hdmi_data.enc_color_depth == 12)
>> - color_format = 0x05;
>> - else if (hdmi->hdmi_data.enc_color_depth == 16)
>> - color_format = 0x07;
>> - else
>> - return;
>> - } else if (hdmi->hdmi_data.enc_in_format == YCBCR444) {
>> - if (hdmi->hdmi_data.enc_color_depth == 8)
>> - color_format = 0x09;
>> - else if (hdmi->hdmi_data.enc_color_depth == 10)
>> - color_format = 0x0B;
>> - else if (hdmi->hdmi_data.enc_color_depth == 12)
>> - color_format = 0x0D;
>> - else if (hdmi->hdmi_data.enc_color_depth == 16)
>> - color_format = 0x0F;
>> - else
>> - return;
>> - } else if (hdmi->hdmi_data.enc_in_format == YCBCR422_8BITS) {
>> - if (hdmi->hdmi_data.enc_color_depth == 8)
>> - color_format = 0x16;
>> - else if (hdmi->hdmi_data.enc_color_depth == 10)
>> - color_format = 0x14;
>> - else if (hdmi->hdmi_data.enc_color_depth == 12)
>> - color_format = 0x12;
>> - else
>> - return;
>> + switch (hdmi->hdmi_data.enc_in_bus_format) {
>> + case MEDIA_BUS_FMT_RGB888_1X24:
>> + color_format = 0x01;
>> + break;
>> + case MEDIA_BUS_FMT_RGB101010_1X30:
>> + color_format = 0x03;
>> + break;
>> + case MEDIA_BUS_FMT_RGB121212_1X36:
>> + color_format = 0x05;
>> + break;
>> + case MEDIA_BUS_FMT_RGB161616_1X48:
>> + color_format = 0x07;
>> + break;
>> +
>> + case MEDIA_BUS_FMT_YUV8_1X24:
>> + color_format = 0x09;
>> + break;
>> + case MEDIA_BUS_FMT_YUV10_1X30:
>> + color_format = 0x0B;
>> + break;
>> + case MEDIA_BUS_FMT_YUV12_1X36:
>> + color_format = 0x0D;
>> + break;
>> + case MEDIA_BUS_FMT_YUV16_1X48:
>> + color_format = 0x0F;
>> + break;
>
> You should add here the 4:2.0 formats. I mean, 4:2:0 8 bits is
> 0x09, 4:2:0 10 bits is 0x0B, 4:2:0 12 bits is 0x0D and 4:2:0 16
> bits is 0x0F.
>
> Best regards,
> Jose Miguel Abreu
>
>> +
>> + case MEDIA_BUS_FMT_UYVY8_1X16:
>> + color_format = 0x16;
>> + break;
>> + case MEDIA_BUS_FMT_UYVY10_1X20:
>> + color_format = 0x14;
>> + break;
>> + case MEDIA_BUS_FMT_UYVY12_1X24:
>> + color_format = 0x12;
>> + break;
>> +
>> + default:
>> + return;
>> }
>>
>> val = HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE |
>> @@ -622,26 +713,30 @@ static void hdmi_video_sample(struct dw_hdmi *hdmi)
>>
>> static int is_color_space_conversion(struct dw_hdmi *hdmi)
>> {
>> - return hdmi->hdmi_data.enc_in_format != hdmi->hdmi_data.enc_out_format;
>> + return hdmi->hdmi_data.enc_in_bus_format != hdmi->hdmi_data.enc_out_bus_format;
>> }
>>
>> static int is_color_space_decimation(struct dw_hdmi *hdmi)
>> {
>> - if (hdmi->hdmi_data.enc_out_format != YCBCR422_8BITS)
>> + if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format))
>> return 0;
>> - if (hdmi->hdmi_data.enc_in_format == RGB ||
>> - hdmi->hdmi_data.enc_in_format == YCBCR444)
>> +
>> + if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_in_bus_format) ||
>> + hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_in_bus_format))
>> return 1;
>> +
>> return 0;
>> }
>>
>> static int is_color_space_interpolation(struct dw_hdmi *hdmi)
>> {
>> - if (hdmi->hdmi_data.enc_in_format != YCBCR422_8BITS)
>> + if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_in_bus_format))
>> return 0;
>> - if (hdmi->hdmi_data.enc_out_format == RGB ||
>> - hdmi->hdmi_data.enc_out_format == YCBCR444)
>> +
>> + if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) ||
>> + hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format))
>> return 1;
>> +
>> return 0;
>> }
>>
>> @@ -652,15 +747,16 @@ static void dw_hdmi_update_csc_coeffs(struct dw_hdmi *hdmi)
>> u32 csc_scale = 1;
>>
>> if (is_color_space_conversion(hdmi)) {
>> - if (hdmi->hdmi_data.enc_out_format == RGB) {
>> - if (hdmi->hdmi_data.colorimetry ==
>> - HDMI_COLORIMETRY_ITU_601)
>> + if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format)) {
>> + if (hdmi->hdmi_data.enc_out_encoding ==
>> + V4L2_YCBCR_ENC_601)
>> csc_coeff = &csc_coeff_rgb_out_eitu601;
>> else
>> csc_coeff = &csc_coeff_rgb_out_eitu709;
>> - } else if (hdmi->hdmi_data.enc_in_format == RGB) {
>> - if (hdmi->hdmi_data.colorimetry ==
>> - HDMI_COLORIMETRY_ITU_601)
>> + } else if (hdmi_bus_fmt_is_rgb(
>> + hdmi->hdmi_data.enc_in_bus_format)) {
>> + if (hdmi->hdmi_data.enc_out_encoding ==
>> + V4L2_YCBCR_ENC_601)
>> csc_coeff = &csc_coeff_rgb_in_eitu601;
>> else
>> csc_coeff = &csc_coeff_rgb_in_eitu709;

Hi Jose,

It seems here that we only have the RGB444<->YUV444 8bit tables, from the Amlogic
source I have the following for 10bit, 12bit and 16bit for itu601 :

static const u16 csc_coeff_rgb_out_eitu601_10b[3][4] = {
{ 0x2000, 0x6926, 0x74fd, 0x043b },
{ 0x2000, 0x2cdd, 0x0000, 0x7a65 },
{ 0x2000, 0x0000, 0x38b4, 0x78ea }
};

static const u16 csc_coeff_rgb_out_eitu601_12b_16b[3][4] = {
{ 0x2000, 0x6926, 0x74fd, 0x10ee },
{ 0x2000, 0x2cdd, 0x0000, 0x6992 },
{ 0x2000, 0x0000, 0x38b4, 0x63a6 }
};

static const u16 csc_coeff_rgb_in_eitu601_10b[3][4] = {
{ 0x2591, 0x1322, 0x074b, 0x0000 },
{ 0x6535, 0x2000, 0x7acc, 0x0800 },
{ 0x6acd, 0x7534, 0x2000, 0x0800 }
};

static const u16 csc_coeff_rgb_in_eitu601_12b_16b[3][4] = {
{ 0x2591, 0x1322, 0x074b, 0x0000 },
{ 0x6535, 0x2000, 0x7acc, 0x2000 },
{ 0x6acd, 0x7534, 0x2000, 0x2000 }
};

But I miss the itu709 values.

Could you confirm these values and maybe provide the itu709 values ?

Thanks !
Neil

>> @@ -698,16 +794,23 @@ static void hdmi_video_csc(struct dw_hdmi *hdmi)
>> else if (is_color_space_decimation(hdmi))
>> decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3;
>>
>> - if (hdmi->hdmi_data.enc_color_depth == 8)
>> + switch (hdmi_bus_fmt_color_depth(hdmi->hdmi_data.enc_out_bus_format)) {
>> + case 8:
>> color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP;
>> - else if (hdmi->hdmi_data.enc_color_depth == 10)
>> + break;
>> + case 10:
>> color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_30BPP;
>> - else if (hdmi->hdmi_data.enc_color_depth == 12)
>> + break;
>> + case 12:
>> color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_36BPP;
>> - else if (hdmi->hdmi_data.enc_color_depth == 16)
>> + break;
>> + case 16:
>> color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_48BPP;
>> - else
>> + break;
>> +
>> + default:
>> return;
>> + }
>>
>> /* Configure the CSC registers */
>> hdmi_writeb(hdmi, interpolation | decimation, HDMI_CSC_CFG);
>> @@ -730,32 +833,43 @@ static void hdmi_video_packetize(struct dw_hdmi *hdmi)
>> struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data;
>> u8 val, vp_conf;
>>
>> - if (hdmi_data->enc_out_format == RGB ||
>> - hdmi_data->enc_out_format == YCBCR444) {
>> - if (!hdmi_data->enc_color_depth) {
>> - output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
>> - } else if (hdmi_data->enc_color_depth == 8) {
>> + if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) ||
>> + hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format)) {
>> + switch (hdmi_bus_fmt_color_depth(
>> + hdmi->hdmi_data.enc_out_bus_format)) {
>> + case 8:
>> color_depth = 4;
>> output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
>> - } else if (hdmi_data->enc_color_depth == 10) {
>> + break;
>> + case 10:
>> color_depth = 5;
>> - } else if (hdmi_data->enc_color_depth == 12) {
>> + break;
>> + case 12:
>> color_depth = 6;
>> - } else if (hdmi_data->enc_color_depth == 16) {
>> + break;
>> + case 16:
>> color_depth = 7;
>> - } else {
>> - return;
>> + break;
>> + default:
>> + output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
>> }
>> - } else if (hdmi_data->enc_out_format == YCBCR422_8BITS) {
>> - if (!hdmi_data->enc_color_depth ||
>> - hdmi_data->enc_color_depth == 8)
>> + } else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
>> + switch (hdmi_bus_fmt_color_depth(
>> + hdmi->hdmi_data.enc_out_bus_format)) {
>> + case 0:
>> + case 8:
>> remap_size = HDMI_VP_REMAP_YCC422_16bit;
>> - else if (hdmi_data->enc_color_depth == 10)
>> + break;
>> + case 10:
>> remap_size = HDMI_VP_REMAP_YCC422_20bit;
>> - else if (hdmi_data->enc_color_depth == 12)
>> + break;
>> + case 12:
>> remap_size = HDMI_VP_REMAP_YCC422_24bit;
>> - else
>> + break;
>> +
>> + default:
>> return;
>> + }
>> output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422;
>> } else {
>> return;
>> @@ -1138,28 +1252,35 @@ static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
>> /* Initialise info frame from DRM mode */
>> drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
>>
>> - if (hdmi->hdmi_data.enc_out_format == YCBCR444)
>> + if (hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format))
>> frame.colorspace = HDMI_COLORSPACE_YUV444;
>> - else if (hdmi->hdmi_data.enc_out_format == YCBCR422_8BITS)
>> + else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format))
>> frame.colorspace = HDMI_COLORSPACE_YUV422;
>> else
>> frame.colorspace = HDMI_COLORSPACE_RGB;
>>
>> /* Set up colorimetry */
>> - if (hdmi->hdmi_data.enc_out_format == XVYCC444) {
>> - frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
>> - if (hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_601)
>> - frame.extended_colorimetry =
>> + switch (hdmi->hdmi_data.enc_out_encoding) {
>> + case V4L2_YCBCR_ENC_601:
>> + if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV601)
>> + frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
>> + else
>> + frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
>> + frame.extended_colorimetry =
>> HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
>> - else /*hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_709*/
>> - frame.extended_colorimetry =
>> + case V4L2_YCBCR_ENC_709:
>> + if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV709)
>> + frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
>> + else
>> + frame.colorimetry = HDMI_COLORIMETRY_ITU_709;
>> + frame.extended_colorimetry =
>> HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
>> - } else if (hdmi->hdmi_data.enc_out_format != RGB) {
>> - frame.colorimetry = hdmi->hdmi_data.colorimetry;
>> - frame.extended_colorimetry = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
>> - } else { /* Carries no data */
>> - frame.colorimetry = HDMI_COLORIMETRY_NONE;
>> - frame.extended_colorimetry = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
>> + break;
>> + default: /* Carries no data */
>> + frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
>> + frame.extended_colorimetry =
>> + HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
>> + break;
>> }
>>
>> frame.scan_mode = HDMI_SCAN_MODE_NONE;
>> @@ -1436,19 +1557,30 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
>> (hdmi->vic == 21) || (hdmi->vic == 22) ||
>> (hdmi->vic == 2) || (hdmi->vic == 3) ||
>> (hdmi->vic == 17) || (hdmi->vic == 18))
>> - hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
>> + hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_601;
>> else
>> - hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
>> + hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_709;
>>
>> hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
>> hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
>>
>> - /* TODO: Get input format from IPU (via FB driver interface) */
>> - hdmi->hdmi_data.enc_in_format = RGB;
>> + /* TOFIX: Get input format from plat data or fallback to RGB888 */
>> + if (hdmi->plat_data->input_bus_format >= 0)
>> + hdmi->hdmi_data.enc_in_bus_format =
>> + hdmi->plat_data->input_bus_format;
>> + else
>> + hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
>> +
>> + /* TOFIX: Get input encoding from plat data or fallback to none */
>> + if (hdmi->plat_data->input_bus_encoding >= 0)
>> + hdmi->hdmi_data.enc_in_encoding =
>> + hdmi->plat_data->input_bus_encoding;
>> + else
>> + hdmi->hdmi_data.enc_in_encoding = V4L2_YCBCR_ENC_DEFAULT;
>>
>> - hdmi->hdmi_data.enc_out_format = RGB;
>> + /* TOFIX: Default to RGB888 output format */
>> + hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
>>
>> - hdmi->hdmi_data.enc_color_depth = 8;
>> hdmi->hdmi_data.pix_repet_factor = 0;
>> hdmi->hdmi_data.hdcp_enable = 0;
>> hdmi->hdmi_data.video_mode.mdataenablepolarity = true;
>> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
>> index bcceee8..c3b8da9 100644
>> --- a/include/drm/bridge/dw_hdmi.h
>> +++ b/include/drm/bridge/dw_hdmi.h
>> @@ -14,6 +14,67 @@
>>
>> struct dw_hdmi;
>>
>> +/**
>> + * DOC: Supported input formats and encodings
>> + *
>> + * Depending on the Hardware configuration of the Controller IP, it supports
>> + * a subset of the following input formats and encodings on it's internal
>> + * 48bit bus.
>> + *
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + Format Name + Format Code + Encodings +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + RGB 4:4:4 8bit + ``MEDIA_BUS_FMT_RGB888_1X24`` + ``V4L2_YCBCR_ENC_DEFAULT`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + RGB 4:4:4 10bits + ``MEDIA_BUS_FMT_RGB101010_1X30``+ ``V4L2_YCBCR_ENC_DEFAULT`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + RGB 4:4:4 12bits + ``MEDIA_BUS_FMT_RGB121212_1X36``+ ``V4L2_YCBCR_ENC_DEFAULT`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + RGB 4:4:4 16bits + ``MEDIA_BUS_FMT_RGB161616_1X48``+ ``V4L2_YCBCR_ENC_DEFAULT`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:4:4 8bit + ``MEDIA_BUS_FMT_YUV8_1X24`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * + + + or ``V4L2_YCBCR_ENC_XV601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_XV709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:4:4 10bits + ``MEDIA_BUS_FMT_YUV10_1X30`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * + + + or ``V4L2_YCBCR_ENC_XV601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_XV709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:4:4 12bits + ``MEDIA_BUS_FMT_YUV12_1X36`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * + + + or ``V4L2_YCBCR_ENC_XV601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_XV709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:4:4 16bits + ``MEDIA_BUS_FMT_YUV16_1X48`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * + + + or ``V4L2_YCBCR_ENC_XV601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_XV709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:2:2 8bit + ``MEDIA_BUS_FMT_UYVY8_1X16`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:2:2 10bits + ``MEDIA_BUS_FMT_UYVY10_1X20`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:2:2 12bits + ``MEDIA_BUS_FMT_UYVY12_1X24`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:2:0 8bit + ``MEDIA_BUS_FMT_UYVY8_1_1X24`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:2:0 10bits + ``MEDIA_BUS_FMT_UYVY10_1_1X30`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:2:0 12bits + ``MEDIA_BUS_FMT_UYVY12_1_1X36`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + * + YCbCr 4:2:0 16bits + ``MEDIA_BUS_FMT_UYVY16_1_1X48`` + ``V4L2_YCBCR_ENC_601`` +
>> + * + + + or ``V4L2_YCBCR_ENC_709`` +
>> + * +----------------------+---------------------------------+------------------------------+
>> + */
>> +
>> enum {
>> DW_HDMI_RES_8,
>> DW_HDMI_RES_10,
>> @@ -62,6 +123,8 @@ struct dw_hdmi_plat_data {
>> struct regmap *regm;
>> enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
>> struct drm_display_mode *mode);
>> + unsigned long input_bus_format;
>> + unsigned long input_bus_encoding;
>>
>> /* Vendor PHY support */
>> const struct dw_hdmi_phy_ops *phy_ops;
>

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