[RESEND-CI v4 05/15] drm/edid: parse ycbcr 420 deep color information

[Sharma, Shashank]

Regards

Shashank


On 6/27/2017 5:23 PM, Ville Syrjälä wrote:
> On Wed, Jun 21, 2017 at 04:04:03PM +0530, Shashank Sharma wrote:
>> CEA-861-F spec adds ycbcr420 deep color support information
>> in hf-vsdb block. This patch extends the existing hf-vsdb parsing
>> function by adding parsing of ycbcr420 deep color support from the
>> EDID and adding it into display information stored.
>>
>> V2: Rebase
>> V3: Rebase
>> V4: Moved definition of y420_dc_modes into this patch, where its used
>>      (Ville)
>>
>> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
>> Cc: Jose Abreu <joabreu at synopsys.com>
>> Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
>> ---
>>   drivers/gpu/drm/drm_edid.c  | 15 +++++++++++++++
>>   include/drm/drm_connector.h |  3 +++
>>   include/drm/drm_edid.h      |  5 +++++
>>   3 files changed, 23 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
>> index 8c7e73b..b4583f6 100644
>> --- a/drivers/gpu/drm/drm_edid.c
>> +++ b/drivers/gpu/drm/drm_edid.c
>> @@ -4196,6 +4196,19 @@ drm_default_rgb_quant_range(const struct drm_display_mode *mode)
>>   }
>>   EXPORT_SYMBOL(drm_default_rgb_quant_range);
>>   
>> +static void drm_parse_ycbcr420_deep_color_info(struct drm_connector *connector,
>> +					     const u8 *db)
>> +{
>> +	struct drm_hdmi_info *info = &connector->display_info.hdmi;
>> +
>> +	if (db[7] & DRM_EDID_YCBCR420_DC_48)
>> +		info->y420_dc_modes |= DRM_EDID_YCBCR420_DC_48;
>> +	if (db[7] & DRM_EDID_YCBCR420_DC_36)
>> +		info->y420_dc_modes |= DRM_EDID_YCBCR420_DC_36;
>> +	if (db[7] & DRM_EDID_YCBCR420_DC_30)
>> +		info->y420_dc_modes |= DRM_EDID_YCBCR420_DC_30;
> y420_dc_modes = db[7] & (...);
>
> will do if you plan to just copy the bits over.
Yep, that's a good idea.
Shashank
>> +}
>> +
>>   static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
>>   				 const u8 *hf_vsdb)
>>   {
>> @@ -4236,6 +4249,8 @@ static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
>>   				scdc->scrambling.low_rates = true;
>>   		}
>>   	}
>> +
>> +	drm_parse_ycbcr420_deep_color_info(connector, hf_vsdb);
>>   }
>>   
>>   static void drm_parse_hdmi_deep_color_info(struct drm_connector *connector,
>> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
>> index ce2212d..1305fe9 100644
>> --- a/include/drm/drm_connector.h
>> +++ b/include/drm/drm_connector.h
>> @@ -156,6 +156,9 @@ struct drm_hdmi_info {
>>   
>>   	/** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */
>>   	unsigned long y420_cmdb_map;
>> +
>> +	/** @y420_dc_modes: bitmap of deep color support index */
>> +	u8 y420_dc_modes;
>>   };
>>   
>>   /**
>> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
>> index 89c0062..d4ff17c 100644
>> --- a/include/drm/drm_edid.h
>> +++ b/include/drm/drm_edid.h
>> @@ -213,6 +213,11 @@ struct detailed_timing {
>>   #define DRM_EDID_HDMI_DC_30               (1 << 4)
>>   #define DRM_EDID_HDMI_DC_Y444             (1 << 3)
>>   
>> +/* YCBCR 420 deep color modes */
>> +#define DRM_EDID_YCBCR420_DC_48		  (1 << 6)
>> +#define DRM_EDID_YCBCR420_DC_36		  (1 << 5)
>> +#define DRM_EDID_YCBCR420_DC_30		  (1 << 4)
>> +
>>   /* ELD Header Block */
>>   #define DRM_ELD_HEADER_BLOCK_SIZE	4
>>   
>> -- 
>> 2.7.4