On Wed, Jan 04, 2023 at 12:05:17PM +0200, Jani Nikula wrote:

Commit 537d9ed2f6c1 ("drm/edid: convert add_cea_modes() to use cea db iter") inadvertently moved the do_hdmi_vsdb_modes() call within the db iteration loop, always passing NULL as the CTA VDB to do_hdmi_vsdb_modes(), skipping a lot of stereo modes.

Move the call back outside of the loop.

This does mean only one CTA VDB and HDMI VSDB combination will be handled, but it's an unlikely scenario to have more than one of either block, and it was not accounted for before the regression either.

Fixes: 537d9ed2f6c1 ("drm/edid: convert add_cea_modes() to use cea db iter") Cc: stable@vger.kernel.org # v6.0+ Cc: Ville Syrjälä ville.syrjala@linux.intel.com Signed-off-by: Jani Nikula jani.nikula@intel.com

---

drivers/gpu/drm/drm_edid.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 23f7146e6a9b..b94adb9bbefb 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -5249,13 +5249,12 @@ static int add_cea_modes(struct drm_connector *connector, { const struct cea_db *db; struct cea_db_iter iter;

• const u8 *hdmi = NULL, *video = NULL;
• u8 hdmi_len = 0, video_len = 0; int modes = 0;

cea_db_iter_edid_begin(drm_edid, &iter); cea_db_iter_for_each(db, &iter) {

• const u8 *hdmi = NULL, *video = NULL;
  

• u8 hdmi_len = 0, video_len = 0;
  

• if (cea_db_tag(db) == CTA_DB_VIDEO) { video = cea_db_data(db); video_len = cea_db_payload_len(db);

@@ -5271,18 +5270,17 @@ static int add_cea_modes(struct drm_connector *connector, modes += do_y420vdb_modes(connector, vdb420, cea_db_payload_len(db) - 1); }

• /*
  

•  * We parse the HDMI VSDB after having added the cea modes as we
  

•  * will be patching their flags when the sink supports stereo
  

•  * 3D.
  

•  */
  

• if (hdmi)
  

• 	modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len,
  

• 				    video, video_len);
  

  } cea_db_iter_end(&iter);

• /*

• * We parse the HDMI VSDB after having added the cea modes as we will be
  

• * patching their flags when the sink supports stereo 3D.
  

• */
  

• if (hdmi)

• modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len,
  

• 			    video, video_len);
  

I wonder if there are any EDIDs with multiple copies of either data block... But the original code couldn't deal with that either so not really a concern for this patch.

Reviewed-by: Ville Syrjälä ville.syrjala@linux.intel.com

• return modes;

} -- 2.34.1