Op 28-01-2019 om 09:44 schreef Uma Shankar:
> Create a new connector property to program colorspace to sink devices.
> Modern sink devices support more than 1 type of colorspace like 601,
> 709, BT2020 etc. This helps to switch based on content type which is
> to be displayed. The decision lies with compositors as to in which
> scenarios, a particular colorspace will be picked.
>
> This will be helpful mostly to switch to higher gamut colorspaces
> like BT2020 when the media content is encoded as BT2020. Thereby
> giving a good visual experience to users.
>
> The expectation from userspace is that it should parse the EDID
> and get supported colorspaces. Use this property and switch to the
> one supported. Driver will expose the platform supported colorspaces,
> however sink supported colorspaces should be retrieved by userspace
> from EDID.
>
> Basically the expectation from userspace is:
> - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink
> colorspace
> - Set this new property to let the sink know what it
> converted the CRTC output to.
>
> 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: Removed Adobe references from enum definitions as per
> Ville, Hans Verkuil and Jonas Karlman suggestions. Changed
> Default to an unset state where driver will assign the colorspace
> is not chosen by user, suggested by Ville and Maarten. Addressed
> other misc review comments from Maarten. 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: Made the property creation helper accept enum list based on
> platform capabilties as suggested by Shashank. Consolidated HDMI
> and DP property creation in the common helper.
>
> v6: Addressed Shashank's review comments.
>
> v7: Added defines instead of enum in uapi as per Brian Starkey's
> suggestion in order to go with string matching at userspace. Updated
> the commit message to add more details as well kernel docs.
>
> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
> Reviewed-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_atomic_uapi.c | 4 ++
> drivers/gpu/drm/drm_connector.c | 95 +++++++++++++++++++++++++++++++++++++++
> include/drm/drm_connector.h | 17 +++++++
> include/uapi/drm/drm_mode.h | 32 +++++++++++++
> 4 files changed, 148 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> index 9a1f41a..9b5d44f 100644
> --- a/drivers/gpu/drm/drm_atomic_uapi.c
> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> @@ -746,6 +746,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
> return -EINVAL;
> }
> state->content_protection = val;
> + } else if (property == connector->colorspace_property) {
> + state->colorspace = val;
> } else if (property == config->writeback_fb_id_property) {
> struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
> int ret = drm_atomic_set_writeback_fb_for_connector(state, fb);
> @@ -814,6 +816,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
> *val = state->picture_aspect_ratio;
> } else if (property == config->content_type_property) {
> *val = state->content_type;
> + } else if (property == connector->colorspace_property) {
> + *val = state->colorspace;
> } else if (property == connector->scaling_mode_property) {
> *val = state->scaling_mode;
> } else if (property == connector->content_protection_property) {
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 8475396..eafa643 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -826,6 +826,54 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info,
> };
> DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list)
>
> +/* List of HDMI Colorspaces supported */
> +static const struct drm_prop_enum_list hdmi_colorspaces[] = {
> + /* 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 61966-2-1/Amendment 1 */
> + { COLORIMETRY_S_YCC_601, "S_YCC_601" },
> + /* Colorimetry based on IEC 61966-2-5 [33] */
> + { COLORIMETRY_OPYCC_601, "opYCC_601" },
> + /* Colorimetry based on IEC 61966-2-5 */
> + { COLORIMETRY_OPRGB, "opRGB" },
> + /* Colorimetry based on ITU-R BT.2020 */
> + { COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
> + /* Colorimetry based on ITU-R BT.2020 */
> + { COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
> + /* Colorimetry based on ITU-R BT.2020 */
> + { COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
> +};
> +
> +/* List of DP Colorspaces supported */
> +static const struct drm_prop_enum_list dp_colorspaces[] = {
> + /* 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" },
> + /* 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
> *
> @@ -1548,6 +1596,53 @@ int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
> EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
>
> /**
> + * DOC: standard connector properties
> + *
> + * Colorspace:
> + * drm_mode_create_colorspace_property - create colorspace property
> + * This property helps select a suitable colorspace based on the sink
> + * capability. Modern sink devices support wider gamut like BT2020.
> + * This helps switch to BT2020 mode if the BT2020 encoded video stream
> + * is being played by the user, same for any other colorspace. Thereby
> + * giving a good visual experience to users.
> + *
> + * The expectation from userspace is that it should parse the EDID
> + * and get supported colorspaces. Use this property and switch to the
> + * one supported. Driver will expose the platform supported colorspaces,
> + * however sink supported colorspaces should be retrieved by userspace
> + * from EDID.
> + *
> + * Basically the expectation from userspace is:
> + * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink
> + * colorspace
> + * - Set this new property to let the sink know what it
> + * converted the CRTC output to.
> + * - This property is just to inform sink what colorspace
> + * source is trying to drive.
> + *
> + * Called by a driver the first time it's needed, must be attached to
> + * desired connectors.
> + */
> +int drm_mode_create_colorspace_property(struct drm_connector *connector,
> + const struct drm_prop_enum_list *props,
> + int num_values)
> +{
> + struct drm_device *dev = connector->dev;
> + struct drm_property *prop;
> +
> + prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
> + "Colorspace",
> + props, num_values);
> + if (!prop)
> + return -ENOMEM;
> +
> + connector->colorspace_property = prop;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(drm_mode_create_colorspace_property);
> +
> +/**
> * drm_mode_create_content_type_property - create content type property
> * @dev: DRM device
> *
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 9941613..e32cd11 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -31,6 +31,7 @@
> #include <drm/drm_util.h>
>
> #include <uapi/drm/drm_mode.h>
> +#include <drm/drm_property.h>
>
> struct drm_connector_helper_funcs;
> struct drm_modeset_acquire_ctx;
> @@ -503,6 +504,13 @@ struct drm_connector_state {
> unsigned int content_protection;
>
> /**
> + * @colorspace: State variable for Connector property to request
> + * colorspace change on Sink. This is most commonly used to switch
> + * to wider color gamuts like BT2020.
> + */
> + u32 colorspace;
> +
> + /**
> * @writeback_job: Writeback job for writeback connectors
> *
> * Holds the framebuffer and out-fence for a writeback connector. As
> @@ -995,6 +1003,12 @@ struct drm_connector {
> struct drm_property *content_protection_property;
>
> /**
> + * @colorspace_property: Connector property to set the suitable
> + * colorspace supported by the sink.
> + */
> + struct drm_property *colorspace_property;
> +
> + /**
> * @path_blob_ptr:
> *
> * DRM blob property data for the DP MST path property. This should only
> @@ -1269,6 +1283,9 @@ int drm_connector_attach_vrr_capable_property(
> int drm_connector_attach_content_protection_property(
> struct drm_connector *connector);
> int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
> +int drm_mode_create_colorspace_property(struct drm_connector *connector,
> + const struct drm_prop_enum_list *props,
> + int num_values);
> int drm_mode_create_content_type_property(struct drm_device *dev);
> void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
> const struct drm_connector_state *conn_state);
> diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
> index a439c2e..2bcdfcf 100644
> --- a/include/uapi/drm/drm_mode.h
> +++ b/include/uapi/drm/drm_mode.h
> @@ -210,6 +210,38 @@
> #define DRM_MODE_CONTENT_PROTECTION_DESIRED 1
> #define DRM_MODE_CONTENT_PROTECTION_ENABLED 2
>
> +/*
> + * This is a consolidated colorimetry list supported by HDMI and
> + * DP protocol standard. The respective connectors will register
> + * a property with the subset of this list (supported by that
> + * respective protocol). Userspace will set the colorspace through
> + * a colorspace property which will be created and exposed to
> + * userspace.
> + */
> +
> +/* For Default case, driver will set the colorspace */
> +#define COLORIMETRY_DEFAULT 0
> +/* CEA 861 Normal Colorimetry options */
> +#define COLORIMETRY_ITU_601 1
> +#define COLORIMETRY_ITU_709 2
> +/* CEA 861 Extended Colorimetry Options */
> +#define COLORIMETRY_XV_YCC_601 3
> +#define COLORIMETRY_XV_YCC_709 4
> +#define COLORIMETRY_S_YCC_601 5
> +#define COLORIMETRY_OPYCC_601 6
> +#define COLORIMETRY_OPRGB 7
> +#define COLORIMETRY_BT2020_RGB 8
> +#define COLORIMETRY_BT2020_YCC 9
> +#define COLORIMETRY_BT2020_CYCC 10
> +/* DP MSA Colorimetry Options */
> +#define DP_COLORIMETRY_Y_CBCR_ITU_601 11
> +#define DP_COLORIMETRY_Y_CBCR_ITU_709 12
> +#define DP_COLORIMETRY_SRGB 13
> +#define DP_COLORIMETRY_RGB_WIDE_GAMUT 14
tab vs space :)
> +#define DP_COLORIMETRY_SCRGB 15
> +#define DP_COLORIMETRY_DCI_P3 16
> +#define DP_COLORIMETRY_CUSTOM_COLOR_PROFILE 17
Since this is in UAPI, you need to prefix with DRM_MODE_
~Maarten
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