[v3 1/3] drm: Add HDMI colorspace property
Ville Syrjälä
ville.syrjala at linux.intel.com
Tue Nov 20 15:26:23 UTC 2018
On Tue, Nov 20, 2018 at 07:52:09PM +0530, Uma Shankar wrote:
> This patch adds a HDMI 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: 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.
>
> Signed-off-by: Uma Shankar <uma.shankar at intel.com>
> ---
> drivers/gpu/drm/drm_atomic_uapi.c | 4 +++
> drivers/gpu/drm/drm_connector.c | 62 +++++++++++++++++++++++++++++++++++++++
> include/drm/drm_connector.h | 8 +++++
> include/drm/drm_mode_config.h | 6 ++++
> include/uapi/drm/drm_mode.h | 16 ++++++++++
> 5 files changed, 96 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> index 86ac339..4e09a38 100644
> --- a/drivers/gpu/drm/drm_atomic_uapi.c
> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> @@ -721,6 +721,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
> state->picture_aspect_ratio = val;
> } else if (property == config->content_type_property) {
> state->content_type = val;
> + } else if (property == config->hdmi_colorspace_property) {
> + state->hdmi_colorspace = val;
> } else if (property == connector->scaling_mode_property) {
> state->scaling_mode = val;
> } else if (property == connector->content_protection_property) {
> @@ -797,6 +799,8 @@ 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 == config->hdmi_colorspace_property) {
> + *val = state->hdmi_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 fa9baac..1906e4a 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -826,6 +826,30 @@ 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)
>
> +static const struct drm_prop_enum_list hdmi_colorspace[] = {
My idea was that we create just the one prop, and filter it as needed.
> + /* 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" },
> + /* For Default case, driver will set the colorspace */
> + { COLORIMETRY_DEFAULT, "Default" },
"Default" needs to be the default.
> +};
> +
> /**
> * DOC: standard connector properties
> *
> @@ -1402,6 +1426,44 @@ int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
> EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
>
> /**
> + * drm_mode_create_colorspace_property - create colorspace property
> + * colorspace:
> + * 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.
> + * @dev: DRM device
> + *
> + * Called by a driver the first time it's needed, must be attached to desired
> + * connectors.
> + *
> + * Returns:
> + * Zero on success, negative errno on failure.
> + */
> +int drm_mode_create_colorspace_property(struct drm_connector *connector)
> +{
> + struct drm_device *dev = connector->dev;
> + struct drm_property *prop;
> +
> + if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
> + connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {
> + if (dev->mode_config.hdmi_colorspace_property)
> + return 0;
> +
> + prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
> + "HDMI_Colorspace",
> + hdmi_colorspace, ARRAY_SIZE(hdmi_colorspace));
> + if (!prop)
> + return -ENOMEM;
> +
> + dev->mode_config.hdmi_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 af0a761..5fda56d 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -497,6 +497,13 @@ struct drm_connector_state {
> unsigned int content_protection;
>
> /**
> + * @hdmi_colorspace: Connector property to request colorspace
> + * change on HDMI Sink. This is most commonly used to switch to
> + * wider color gamuts like BT2020.
> + */
> + enum hdmi_full_colorimetry hdmi_colorspace;
> +
> + /**
> * @writeback_job: Writeback job for writeback connectors
> *
> * Holds the framebuffer and out-fence for a writeback connector. As
> @@ -1272,6 +1279,7 @@ int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
> 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);
> 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/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
> index 5dbeabd..ec7cab8 100644
> --- a/include/drm/drm_mode_config.h
> +++ b/include/drm/drm_mode_config.h
> @@ -869,6 +869,12 @@ struct drm_mode_config {
> uint32_t cursor_width, cursor_height;
>
> /**
> + * @hdmi_colorspace_property: Connector property to set the suitable
> + * colorspace supported by the HDMI sink.
> + */
> + struct drm_property *hdmi_colorspace_property;
> +
> + /**
> * @suspend_state:
> *
> * Atomic state when suspended.
> diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
> index d3e0fe3..cc4df26 100644
> --- a/include/uapi/drm/drm_mode.h
> +++ b/include/uapi/drm/drm_mode.h
> @@ -210,6 +210,22 @@
> #define DRM_MODE_CONTENT_PROTECTION_DESIRED 1
> #define DRM_MODE_CONTENT_PROTECTION_ENABLED 2
>
> +enum hdmi_full_colorimetry {
> + /* CEA 861 Normal Colorimetry options */
> + COLORIMETRY_ITU_601 = 0,
> + COLORIMETRY_ITU_709,
> + /* CEA 861 Extended Colorimetry Options */
> + COLORIMETRY_XV_YCC_601,
> + COLORIMETRY_XV_YCC_709,
> + COLORIMETRY_S_YCC_601,
> + COLORIMETRY_OPYCC_601,
> + COLORIMETRY_OPRGB,
> + COLORIMETRY_BT2020_RGB,
> + COLORIMETRY_BT2020_YCC,
> + COLORIMETRY_BT2020_CYCC,
> + COLORIMETRY_DEFAULT,
> +};
> +
> struct drm_mode_modeinfo {
> __u32 clock;
> __u16 hdisplay;
> --
> 1.9.1
>
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--
Ville Syrjälä
Intel
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