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@xxxxxxxxx>
---
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[] = {
+ /* 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" },
+};
+
/**
* 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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