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

From: Brian Starkey <Brian.Starkey@arm.com>
To: Uma Shankar <uma.shankar@intel.com>
Cc: "ville.syrjala@intel.com" <ville.syrjala@intel.com>,
	"jonas@kwiboo.se" <jonas@kwiboo.se>,
	"intel-gfx@lists.freedesktop.org"
	<intel-gfx@lists.freedesktop.org>,
	"dri-devel@lists.freedesktop.org"
	<dri-devel@lists.freedesktop.org>,
	"hansverk@cisco.com" <hansverk@cisco.com>, nd <nd@arm.com>,
	"maarten.lankhorst@intel.com" <maarten.lankhorst@intel.com>
Subject: Re: [v4 2/3] drm: Add DP colorspace property
Date: Wed, 28 Nov 2018 11:41:58 +0000	[thread overview]
Message-ID: <20181128114143.y5gpptwsj5trcvcf@DESKTOP-E1NTVVP.localdomain> (raw)
In-Reply-To: <1543336843-22193-3-git-send-email-uma.shankar@intel.com>

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@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

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
> 
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