From 58304630b830a1c27457ce2e3a0912555b43d03e Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Tue, 3 May 2022 12:24:04 +0300 Subject: [PATCH] drm/edid: skip CTA extension scan in drm_edid_to_eld() just for CTA rev MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The DisplayID CTA data block version does not necessarily match the CTA revision. Simplify by postponing drm_edid_to_eld() slightly, and reusing the CTA revision extracted by drm_parse_cea_ext(). By not bailing out early in drm_edid_to_eld() we may end up filling meaningless data to the ELD. However, the main decision for audio is not the ELD, but rather drm_detect_monitor_audio() called by drivers. (Arguably a future cleanup could do that in drm_add_edid_modes() and cache the result in the connector.) Cc: Ville Syrjälä Signed-off-by: Jani Nikula Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/163ebbfd765066acbfc267256fb3b67fc711a78d.1651569697.git.jani.nikula@intel.com --- drivers/gpu/drm/drm_edid.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 8d737322145c..2e52be67eadf 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4863,10 +4863,10 @@ static void clear_eld(struct drm_connector *connector) static void drm_edid_to_eld(struct drm_connector *connector, const struct edid *edid) { + const struct drm_display_info *info = &connector->display_info; const struct cea_db *db; struct cea_db_iter iter; uint8_t *eld = connector->eld; - const u8 *cea; int total_sad_count = 0; int mnl; @@ -4875,16 +4875,10 @@ static void drm_edid_to_eld(struct drm_connector *connector, if (!edid) return; - cea = drm_find_cea_extension(edid); - if (!cea) { - DRM_DEBUG_KMS("ELD: no CEA Extension found\n"); - return; - } - mnl = get_monitor_name(edid, &eld[DRM_ELD_MONITOR_NAME_STRING]); DRM_DEBUG_KMS("ELD monitor %s\n", &eld[DRM_ELD_MONITOR_NAME_STRING]); - eld[DRM_ELD_CEA_EDID_VER_MNL] = cea[1] << DRM_ELD_CEA_EDID_VER_SHIFT; + eld[DRM_ELD_CEA_EDID_VER_MNL] = info->cea_rev << DRM_ELD_CEA_EDID_VER_SHIFT; eld[DRM_ELD_CEA_EDID_VER_MNL] |= mnl; eld[DRM_ELD_VER] = DRM_ELD_VER_CEA861D; @@ -5821,8 +5815,6 @@ static int drm_edid_connector_update(struct drm_connector *connector, return 0; } - drm_edid_to_eld(connector, edid); - /* * CEA-861-F adds ycbcr capability map block, for HDMI 2.0 sinks. * To avoid multiple parsing of same block, lets parse that map @@ -5830,6 +5822,9 @@ static int drm_edid_connector_update(struct drm_connector *connector, */ quirks = drm_add_display_info(connector, edid); + /* Depends on info->cea_rev set by drm_add_display_info() above */ + drm_edid_to_eld(connector, edid); + /* * EDID spec says modes should be preferred in this order: * - preferred detailed mode -- 2.20.1