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drm/edid: convert drm_detect_hdmi_monitor() to use cea db iter

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Iterate through all CTA data blocks, not just the first CTA extension.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b867e7b628189d2f8fa7eac5b9aa701892724711.1651569697.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2022-05-03 12:23:56 +03:00
parent b07debc2a8
commit 4ce08703a8
1 changed files with 11 additions and 14 deletions
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25
drivers/gpu/drm/drm_edid.c
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@ -5131,27 +5131,24 @@ EXPORT_SYMBOL(drm_av_sync_delay);
*/
bool drm_detect_hdmi_monitor(const struct edid *edid)
{
const u8 *edid_ext;
int i;
int start_offset, end_offset;
edid_ext = drm_find_cea_extension(edid);
if (!edid_ext)
return false;
if (cea_db_offsets(edid_ext, &start_offset, &end_offset))
return false;
const struct cea_db *db;
struct cea_db_iter iter;
bool hdmi = false;
/*
* Because HDMI identifier is in Vendor Specific Block,
* search it from all data blocks of CEA extension.
*/
for_each_cea_db(edid_ext, i, start_offset, end_offset) {
if (cea_db_is_hdmi_vsdb(&edid_ext[i]))
return true;
cea_db_iter_edid_begin(edid, &iter);
cea_db_iter_for_each(db, &iter) {
if (cea_db_is_hdmi_vsdb(db)) {
hdmi = true;
break;
}
}
cea_db_iter_end(&iter);
return false;
return hdmi;
}
EXPORT_SYMBOL(drm_detect_hdmi_monitor);