From 6094c5cb27b11c3db878a8304bd13119887eccaf Mon Sep 17 00:00:00 2001 From: Uma Shankar Date: Mon, 22 Jan 2018 10:06:43 +0200 Subject: 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 --- drivers/gpu/drm/drm_edid.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'drivers/gpu/drm/drm_edid.c') 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); } } -- cgit v1.2.3