This patch adds a blob property to get HDR metadata
information from userspace. This will be send as part
of AVI Infoframe to panel.
v2: Rebase and modified the metadata structure elements
as per Ville's POC changes.
v3: No Change
v4: Addressed Shashank's review comments
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/gpu/drm/drm_connector.c | 6 ++++++
include/drm/drm_connector.h | 10 ++++++++++
include/drm/drm_mode_config.h | 6 ++++++
include/linux/hdmi.h | 10 ++++++++++
include/uapi/drm/drm_mode.h | 16 ++++++++++++++++
5 files changed, 48 insertions(+)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 8475396..78dd38f 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -1027,6 +1027,12 @@ int drm_connector_create_standard_properties(struct drm_device *dev)
return -ENOMEM;
dev->mode_config.non_desktop_property = prop;
+ prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
+ "HDR_OUTPUT_METADATA", 0);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.hdr_source_metadata_property = prop;
+
return 0;
}
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index f82701d..4ce74f3 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -520,6 +520,13 @@ struct drm_connector_state {
* and the connector bpc limitations obtained from edid.
*/
u8 max_bpc;
+
+ /**
+ * @metadata_blob_ptr:
+ * DRM blob property for HDR output metadata
+ */
+ struct drm_property_blob *hdr_output_metadata_blob_ptr;
+ u8 hdr_metadata_changed : 1;
};
/**
@@ -1154,6 +1161,9 @@ struct drm_connector {
* &drm_mode_config.connector_free_work.
*/
struct llist_node free_node;
+
+ /* HDR metdata */
+ struct hdr_static_metadata hdr_metadata;
};
#define obj_to_connector(x) container_of(x, struct drm_connector, base)
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 1e6cb88..5fff4aa 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -836,6 +836,12 @@ struct drm_mode_config {
*/
struct drm_property *writeback_out_fence_ptr_property;
+ /*
+ * hdr_metadata_property: Connector property containing hdr metatda
+ * This will be provided by userspace compositors based on HDR content
+ */
+ struct drm_property *hdr_output_metadata_property;
+
/* dumb ioctl parameters */
uint32_t preferred_depth, prefer_shadow;
diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
index d2bacf5..bed3e08 100644
--- a/include/linux/hdmi.h
+++ b/include/linux/hdmi.h
@@ -137,6 +137,16 @@ enum hdmi_content_type {
HDMI_CONTENT_TYPE_GAME,
};
+enum hdmi_metadata_type {
+ HDMI_STATIC_METADATA_TYPE1 = 1,
+};
+
+enum hdmi_eotf {
+ HDMI_EOTF_TRADITIONAL_GAMMA_SDR,
+ HDMI_EOTF_TRADITIONAL_GAMMA_HDR,
+ HDMI_EOTF_SMPTE_ST2084,
+};
+
struct hdmi_avi_infoframe {
enum hdmi_infoframe_type type;
unsigned char version;
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index a439c2e..5012af2 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -630,6 +630,22 @@ struct drm_color_lut {
__u16 reserved;
};
+/* HDR Metadata */
+struct hdr_static_metadata {
+ uint8_t eotf;
+ uint8_t metadata_type;
+ struct {
+ uint16_t x, y;
+ } display_primaries[3];
+ struct {
+ uint16_t x, y;
+ } white_point;
+ uint16_t max_mastering_display_luminance;
+ uint16_t min_mastering_display_luminance;
+ uint16_t max_fall;
+ uint16_t max_cll;
+};
+
#define DRM_MODE_PAGE_FLIP_EVENT 0x01
#define DRM_MODE_PAGE_FLIP_ASYNC 0x02
#define DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE 0x4
--
1.9.1
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