This patch adds a colorspace property, enabling
userspace to switch to various supported colorspaces.
This will help enable BT2020 along with other colorspaces.
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/gpu/drm/drm_atomic.c | 4 ++++
drivers/gpu/drm/drm_connector.c | 31 +++++++++++++++++++++++++++++++
include/drm/drm_connector.h | 7 +++++++
include/drm/drm_mode_config.h | 6 ++++++
include/uapi/drm/drm_mode.h | 11 +++++++++++
5 files changed, 59 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 3eb061e..f065e6f 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1397,6 +1397,8 @@ 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) {
@@ -1502,6 +1504,8 @@ static void drm_atomic_connector_print_state(struct drm_printer *p,
*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 5ada064..cfe1d79 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -805,6 +805,25 @@ 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 IEC 61966-2-4 */
+ { EXTENDED_COLORIMETRY_XV_YCC_601, "601" },
+ /* High Definition Colorimetry based on IEC 61966-2-4 */
+ { EXTENDED_COLORIMETRY_XV_YCC_709, "709" },
+ /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
+ { EXTENDED_COLORIMETRY_S_YCC_601, "s601" },
+ /* Colorimetry based on IEC 61966-2-5 [33] */
+ { EXTENDED_COLORIMETRY_ADOBE_YCC_601, "adobe601" },
+ /* Colorimetry based on IEC 61966-2-5 */
+ { EXTENDED_COLORIMETRY_ADOBE_RGB, "adobe_rgb" },
+ /* Colorimetry based on ITU-R BT.2020 */
+ { EXTENDED_COLORIMETRY_BT2020_RGB, "BT2020_rgb" },
+ /* Colorimetry based on ITU-R BT.2020 */
+ { EXTENDED_COLORIMETRY_BT2020_YCC, "BT2020_ycc" },
+ /* Colorimetry based on ITU-R BT.2020 */
+ { EXTENDED_COLORIMETRY_BT2020_CYCC, "BT2020_cycc" },
+};
+
/**
* DOC: standard connector properties
*
@@ -951,6 +970,12 @@ 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)
@@ -999,6 +1024,12 @@ 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 a5179eb..306b536 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -443,6 +443,13 @@ 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 extended_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 a0b202e..3afe30b 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -841,6 +841,12 @@ 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 8d67243..c9d14ca 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -209,6 +209,17 @@
#define DRM_MODE_CONTENT_PROTECTION_DESIRED 1
#define DRM_MODE_CONTENT_PROTECTION_ENABLED 2
+enum extended_colorimetry {
+ EXTENDED_COLORIMETRY_XV_YCC_601 = 0,
+ EXTENDED_COLORIMETRY_XV_YCC_709,
+ EXTENDED_COLORIMETRY_S_YCC_601,
+ EXTENDED_COLORIMETRY_ADOBE_YCC_601,
+ EXTENDED_COLORIMETRY_ADOBE_RGB,
+ EXTENDED_COLORIMETRY_BT2020_RGB,
+ EXTENDED_COLORIMETRY_BT2020_YCC,
+ EXTENDED_COLORIMETRY_BT2020_CYCC,
+};
+
struct drm_mode_modeinfo {
__u32 clock;
__u16 hdisplay;
--
1.9.1
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