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" },
+ /* 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" },
+ { COLORIMETRY_RGB_WIDE_GAMUT, "RGB Wide Gamut" },
+ { COLORIMETRY_SCRGB, "SCRGB" },
+ { COLORIMETRY_DCI_P3, "DCIP3" },
+ { COLORIMETRY_CUSTOM_COLOR_PROFILE, "Custom Proflie" },
+ /* FOR HD 720p+, Default Colorimetry is based on ITU-R BT.709 */
+ { COLORIMETRY_DEFAULT, "Default: ITU_709" },
+};
+
/**
* 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;
--
1.9.1
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