CEA 861.3 spec adds colorimetry data block for HDMI. Parsing the block to get the colorimetry data from panel.
v2: Rebase
Signed-off-by: Uma Shankar uma.shankar@intel.com --- drivers/gpu/drm/drm_edid.c | 24 ++++++++++++++++++++++++ include/drm/drm_connector.h | 2 ++ 2 files changed, 26 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index d12b74e..344d8c1 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3818,6 +3818,28 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode) mode->clock = clock; }
+static bool cea_db_is_hdmi_colorimetry_data_block(const u8 *db) +{ + if (cea_db_tag(db) != DATA_BLOCK_EXTENDED_TAG) + return false; + + if (db[1] != COLORIMETRY_DATA_BLOCK) + return false; + + return true; +} + +static void +drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db) +{ + struct drm_hdmi_info *info = &connector->display_info.hdmi; + uint16_t len; + + len = cea_db_payload_len(db); + info->colorimetry = db[2]; +} + + static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db) { if (cea_db_tag(db) != DATA_BLOCK_EXTENDED_TAG) @@ -4513,6 +4535,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector, drm_parse_y420cmdb_bitmap(connector, db); if (cea_db_is_hdmi_hdr_metadata_block(db)) drm_parse_hdr_metadata_block(connector, db); + if (cea_db_is_hdmi_colorimetry_data_block(db)) + drm_parse_colorimetry_data_block(connector, db); } }
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 2ee45dc..90ce364 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -206,6 +206,8 @@ struct drm_hdmi_info {
/** @y420_dc_modes: bitmap of deep color support index */ u8 y420_dc_modes; + + u8 colorimetry; };
/**