[v4 2/3] drm: Add DP colorspace property

[Shankar, Uma]

>-----Original Message-----
>From: Brian Starkey [mailto:Brian.Starkey at arm.com]
>Sent: Wednesday, November 28, 2018 5:12 PM
>To: Shankar, Uma <uma.shankar at intel.com>
>Cc: intel-gfx at lists.freedesktop.org; dri-devel at lists.freedesktop.org; Lankhorst,
>Maarten <maarten.lankhorst at intel.com>; Syrjala, Ville <ville.syrjala at intel.com>;
>Sharma, Shashank <shashank.sharma at intel.com>; jonas at kwiboo.se;
>hansverk at cisco.com; nd <nd at arm.com>
>Subject: Re: [v4 2/3] drm: Add DP colorspace property
>
>Hi Uma,
>
>On Tue, Nov 27, 2018 at 10:10:42PM +0530, Uma Shankar wrote:
>> This patch adds a DP colorspace property, enabling userspace to switch
>> to various supported colorspaces.
>> This will help enable BT2020 along with other colorspaces.
>>
>> v2: Addressed Maarten and Ville's review comments. Enhanced
>>     the colorspace enum to incorporate both HDMI and DP supported
>>     colorspaces. Also, added a default option for colorspace.
>>
>> v3: Split the changes to have separate colorspace property for DP and
>> HDMI.
>>
>> v4: Addressed Chris and Ville's review comments, and created a common
>> colorspace property for DP and HDMI, filtered the list based on the
>> colorspaces supported by the respective protocol standard.
>>
>> Signed-off-by: Uma Shankar <uma.shankar at intel.com>
>> ---
>>  drivers/gpu/drm/drm_connector.c | 31 +++++++++++++++++++++++++++++++
>>  1 file changed, 31 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/drm_connector.c
>> b/drivers/gpu/drm/drm_connector.c index 57d36e4..30e2e6f 100644
>> --- a/drivers/gpu/drm/drm_connector.c
>> +++ b/drivers/gpu/drm/drm_connector.c
>> @@ -850,6 +850,29 @@ int drm_display_info_set_bus_formats(struct
>drm_display_info *info,
>>  	{ COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },  };
>>
>> +static const struct drm_prop_enum_list dp_colorspace[] = {
>> +	/* For Default case, driver will set the colorspace */
>> +	{ COLORIMETRY_DEFAULT, "Default" },
>> +	/* Standard Definition Colorimetry based on CEA 861 */
>> +	{ COLORIMETRY_ITU_601, "ITU_601" },
>> +	{ COLORIMETRY_ITU_709, "ITU_709" },
>> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
>> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
>> +	/* Colorimetry based on IEC 61966-2-5 */
>> +	{ COLORIMETRY_OPRGB, "opRGB" },
>
>A macro for the common ones might be good to ensure they always stay in-sync
>between HDMI and DP

Yes, I can make that. Will update it.

Thanks & Regards,
Uma Shankar

>Thanks,
>-Brian
>
>> +	/* DP MSA Colorimetry */
>> +	{ DP_COLORIMETRY_Y_CBCR_ITU_601, "YCBCR_ITU_601" },
>> +	{ DP_COLORIMETRY_Y_CBCR_ITU_709, "YCBCR_ITU_709" },
>> +	{ DP_COLORIMETRY_SRGB, "sRGB" },
>> +	{ DP_COLORIMETRY_RGB_WIDE_GAMUT, "RGB Wide Gamut" },
>> +	{ DP_COLORIMETRY_SCRGB, "scRGB" },
>> +	{ DP_COLORIMETRY_DCI_P3, "DCI-P3" },
>> +	{ DP_COLORIMETRY_CUSTOM_COLOR_PROFILE, "Custom Profile" }, };
>> +
>> +
>>  /**
>>   * DOC: standard connector properties
>>   *
>> @@ -1454,6 +1477,14 @@ int drm_mode_create_colorspace_property(struct
>drm_connector *connector)
>>  						ARRAY_SIZE(hdmi_colorspace));
>>  		if (!prop)
>>  			return -ENOMEM;
>> +	} else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP
>||
>> +		connector->connector_type ==
>DRM_MODE_CONNECTOR_DisplayPort) {
>> +
>> +		prop = drm_property_create_enum(dev,
>DRM_MODE_PROP_ENUM,
>> +						"Colorspace", dp_colorspace,
>> +						ARRAY_SIZE(dp_colorspace));
>> +		if (!prop)
>> +			return -ENOMEM;
>>  	}
>>
>>  	connector->colorspace_property = prop;
>> --
>> 1.9.1
>>