From 8db73897698ccb4eb70ab103245372569ff5a5ec Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Thu, 5 May 2022 13:52:42 +0300 Subject: [PATCH] drm/edid: detect color formats and CTA revision in all CTA extensions MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Convert drm_find_cea_extension() to EDID block iterator in color format and CTA revision detection. Detect them in all CTA extensions. Also parse CTA Data Blocks in DisplayID even if there's no CTA EDID extension. v2: - Don't assume DRM_COLOR_FORMAT_RGB444 support if there's only DisplayID CTA Data Blocks (Ville) Cc: Ville Syrjälä Signed-off-by: Jani Nikula Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220505105242.1198521-1-jani.nikula@intel.com --- drivers/gpu/drm/drm_edid.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 3b18a6e501df0..8d737322145ca 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -5447,26 +5447,31 @@ static void drm_parse_cea_ext(struct drm_connector *connector, const struct edid *edid) { struct drm_display_info *info = &connector->display_info; + struct drm_edid_iter edid_iter; const struct cea_db *db; struct cea_db_iter iter; const u8 *edid_ext; - edid_ext = drm_find_cea_extension(edid); - if (!edid_ext) - return; + drm_edid_iter_begin(edid, &edid_iter); + drm_edid_iter_for_each(edid_ext, &edid_iter) { + if (edid_ext[0] != CEA_EXT) + continue; - info->cea_rev = edid_ext[1]; + if (!info->cea_rev) + info->cea_rev = edid_ext[1]; - /* The existence of a CEA block should imply RGB support */ - info->color_formats = DRM_COLOR_FORMAT_RGB444; + if (info->cea_rev != edid_ext[1]) + DRM_DEBUG_KMS("CEA extension version mismatch %u != %u\n", + info->cea_rev, edid_ext[1]); - /* CTA DisplayID Data Block does not have byte #3 */ - if (edid_ext[0] == CEA_EXT) { + /* The existence of a CTA extension should imply RGB support */ + info->color_formats = DRM_COLOR_FORMAT_RGB444; if (edid_ext[3] & EDID_CEA_YCRCB444) info->color_formats |= DRM_COLOR_FORMAT_YCBCR444; if (edid_ext[3] & EDID_CEA_YCRCB422) info->color_formats |= DRM_COLOR_FORMAT_YCBCR422; } + drm_edid_iter_end(&edid_iter); cea_db_iter_edid_begin(edid, &iter); cea_db_iter_for_each(db, &iter) { -- 2.30.2