Op 31-10-18 om 13:05 schreef Uma Shankar:
> This patch adds a 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.
>
> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_atomic_uapi.c | 4 ++++
> drivers/gpu/drm/drm_connector.c | 44 +++++++++++++++++++++++++++++++++++++++
> include/drm/drm_connector.h | 7 +++++++
> include/drm/drm_mode_config.h | 6 ++++++
> include/uapi/drm/drm_mode.h | 24 +++++++++++++++++++++
> 5 files changed, 85 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> index d5b7f31..9e1d46b 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->colorspace_property) {
> + state->colorspace = val;
> } else if (property == connector->scaling_mode_property) {
> state->scaling_mode = val;
> } else if (property == connector->content_protection_property) {
> @@ -795,6 +797,8 @@ 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->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 aa18b1d..5ad52a0 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -826,6 +826,38 @@ 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 colorspace[] = {
> + /* Standard Definition Colorimetry based on CEA 861 */
> + { COLORIMETRY_ITU_601, "601" },
> + { COLORIMETRY_ITU_709, "709" },
> + /* Standard Definition Colorimetry based on IEC 61966-2-4 */
> + { COLORIMETRY_XV_YCC_601, "601" },
> + /* High Definition Colorimetry based on IEC 61966-2-4 */
> + { COLORIMETRY_XV_YCC_709, "709" },
2 definitions that share the same name?
All in all, I think the enum strings need to be more descriptive and self-consistent.
> + /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
> + { COLORIMETRY_S_YCC_601, "s601" },
> + /* Colorimetry based on IEC 61966-2-5 [33] */
> + { COLORIMETRY_ADOBE_YCC_601, "adobe601" },
> + /* Colorimetry based on IEC 61966-2-5 */
> + { COLORIMETRY_ADOBE_RGB, "adobe_rgb" },
> + /* 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" },
> + /* DP MSA Colorimetry */
> + { COLORIMETRY_Y_CBCR_ITU_601, "YCBCR_ITU_601" },
> + { COLORIMETRY_Y_CBCR_ITU_709, "YCBCR_ITU_709" },
> + { COLORIMETRY_SRGB, "SRGB" },
sRGB
> + { COLORIMETRY_RGB_WIDE_GAMUT, "RGB Wide Gamut" },
> + { COLORIMETRY_SCRGB, "SCRGB" },
scRGB?
> + { COLORIMETRY_DCI_P3, "DCIP3" },
DCI-P3?
> + { COLORIMETRY_CUSTOM_COLOR_PROFILE, "Custom Proflie" },
^Typo
> + /* FOR HD 720p+, Default Colorimetry is based on ITU-R BT.709 */
> + { COLORIMETRY_DEFAULT, "Default: ITU_709" },
This enum together with the code below is broken.
+ COLORIMETRY_DEFAULT = COLORIMETRY_ITU_709,
I would just make it COLORIMETRY_UNSET = "Unset".
To set the default colorimetry for all drivers, just make the default value 0 (preferred),
or add it to __drm_atomic_helper_connector_reset().
> +};
> +
> /**
> * DOC: standard connector properties
> *
> @@ -972,6 +1004,12 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info,
> * can also expose this property to external outputs, in which case they
> * must support "None", which should be the default (since external screens
> * have a built-in scaler).
> + *
> + * 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.
> */
>
> int drm_connector_create_standard_properties(struct drm_device *dev)
> @@ -1020,6 +1058,12 @@ int drm_connector_create_standard_properties(struct drm_device *dev)
> return -ENOMEM;
> dev->mode_config.non_desktop_property = prop;
>
> + prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace",
> + colorspace, ARRAY_SIZE(colorspace));
> + if (!prop)
> + return -ENOMEM;
> + dev->mode_config.colorspace_property = prop;
> +
> return 0;
> }
>
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index dd0552c..b7f5373 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;
>
> /**
> + * @colorspace: Connector property to request colorspace
> + * change. This is most commonly used to switch to wider color
> + * gamuts like BT2020.
> + */
> + enum encoder_colorimetry colorspace;
> +
> + /**
> * @writeback_job: Writeback job for writeback connectors
> *
> * Holds the framebuffer and out-fence for a writeback connector. As
> diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
> index d643d26..a6eb0aa 100644
> --- a/include/drm/drm_mode_config.h
> +++ b/include/drm/drm_mode_config.h
> @@ -863,6 +863,12 @@ struct drm_mode_config {
> uint32_t cursor_width, cursor_height;
>
> /**
> + * @colorspace_property: Connector property to set the suitable
> + * colorspace supported by the sink.
> + */
> + struct drm_property *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..831cc77 100644
> --- a/include/uapi/drm/drm_mode.h
> +++ b/include/uapi/drm/drm_mode.h
> @@ -210,6 +210,30 @@
> #define DRM_MODE_CONTENT_PROTECTION_DESIRED 1
> #define DRM_MODE_CONTENT_PROTECTION_ENABLED 2
>
> +enum encoder_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_ADOBE_YCC_601,
> + COLORIMETRY_ADOBE_RGB,
> + COLORIMETRY_BT2020_RGB,
> + COLORIMETRY_BT2020_YCC,
> + COLORIMETRY_BT2020_CYCC,
> + /* DP MSA Colorimetry Options */
> + COLORIMETRY_Y_CBCR_ITU_601,
> + COLORIMETRY_Y_CBCR_ITU_709,
> + COLORIMETRY_SRGB,
> + COLORIMETRY_RGB_WIDE_GAMUT,
> + COLORIMETRY_SCRGB,
> + COLORIMETRY_DCI_P3,
> + COLORIMETRY_CUSTOM_COLOR_PROFILE,
> + COLORIMETRY_DEFAULT = COLORIMETRY_ITU_709,
> +};
> +
> struct drm_mode_modeinfo {
> __u32 clock;
> __u16 hdisplay;
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