[Intel-gfx] [v16 2/4] drm: Add DP colorspace property

[Ville Syrjälä]

On Wed, Feb 13, 2019 at 12:35:09PM +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.
> 
> v5: Merged the DP handling along with platform colorspace
> handling as per Shashank's comments.
> 
> v6: Reverted to old design of exposing all colorspaces to
> userspace as per Ville's review comment
> 
> v7: Fixed sparse warnings, updated the RB from Maarten and Jani's ack.
> 
> v8: Addressed Ville's review comments and updated the colorspace
> macro definitions.
> 
> Signed-off-by: Uma Shankar <uma.shankar at intel.com>
> Acked-by: Jani Nikula <jani.nikula at intel.com>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> ---
>  drivers/gpu/drm/drm_connector.c | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 07d65a1..5473bea 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -853,6 +853,24 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info,
>  	{ DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" },
>  };
>  
> +static const struct drm_prop_enum_list dp_colorspaces[] = {
> +	/* For Default case, driver will set the colorspace */
> +	{ DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
> +	{ DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
> +	{ DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
> +	/* Colorimetry based on IEC 61966-2-5 */
> +	{ DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
> +	{ DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
> +	/* DP MSA Colorimetry */
> +	{ DRM_MODE_DP_COLORIMETRY_BT601_YCC, "BT601_YCC" },
> +	{ DRM_MODE_DP_COLORIMETRY_BT709_YCC, "BT709_YCC" },
> +	{ DRM_MODE_DP_COLORIMETRY_SRGB, "sRGB" },
> +	{ DRM_MODE_DP_COLORIMETRY_RGB_WIDE_GAMUT, "RGB Wide Gamut" },
> +	{ DRM_MODE_DP_COLORIMETRY_SCRGB, "scRGB" },
> +};

I think we should postpone this patch (and the DP related bits in the
previous patch) until we have the implementation done. Ie. let's just
get HDMI working initially.

> +
>  /**
>   * DOC: standard connector properties
>   *
> @@ -1614,6 +1632,14 @@ int drm_mode_create_colorspace_property(struct drm_connector *connector)
>  						ARRAY_SIZE(hdmi_colorspaces));
>  		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_colorspaces,
> +						ARRAY_SIZE(dp_colorspaces));
> +
> +		if (!prop)
> +			return -ENOMEM;
>  	} else {
>  		DRM_DEBUG_KMS("Colorspace property not supported\n");
>  		return 0;
> -- 
> 1.9.1
> 
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-- 
Ville Syrjälä
Intel