diff options
| author | Uma Shankar <uma.shankar@intel.com> | 2018-01-22 10:06:43 +0200 |
|---|---|---|
| committer | Leonard Crestez <leonard.crestez@nxp.com> | 2018-08-24 12:41:33 +0300 |
| commit | 6094c5cb27b11c3db878a8304bd13119887eccaf (patch) | |
| tree | aee6daa00a5b7c97daba2594f5a48e18fcbe595b /drivers/gpu/drm/drm_edid.c | |
| parent | f7e4c8d714b349b8163c97d9c45e55fc51a39f30 (diff) | |
drm: Parse Colorimetry data block from EDID
EA 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@intel.com>
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 129dbc6904b0..37d47f99d917 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3519,6 +3519,28 @@ 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) @@ -4208,6 +4230,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector, drm_parse_hdr_metadata_block(connector, db); if (cea_db_is_hdmi_forum_vsdb(db)) drm_parse_hdmi_forum_vsdb(connector, db); + if (cea_db_is_hdmi_colorimetry_data_block(db)) + drm_parse_colorimetry_data_block(connector, db); } } |