CEA 861.3 spec adds colorimetry data block for HDMI.
Parsing the block to get the colorimetry data from
panel.
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
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 14f2740..c9b9c3c 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3375,6 +3375,28 @@ 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)
@@ -4055,6 +4077,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
drm_parse_hdmi_forum_vsdb(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 c99d737..c2b0798 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -137,6 +137,8 @@ struct drm_scdc {
struct drm_hdmi_info {
/** @scdc: sink's scdc support and capabilities */
struct drm_scdc scdc;
+ /* Colorimerty info from EDID */
+ u32 colorimetry;
};
/**
--
1.7.9.5
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