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drm/edid: add drm_edid helper for drm_edid_to_sad()

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We'll need to propagate drm_edid everywhere.

v2: Handle NULL EDID pointer (Ville, CI)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/14aa1e44caa2e9c1b54c2f2a471d2fd7d3f62d5d.1652097712.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2022-05-09 15:03:16 +03:00
parent 45aa2336fa
commit bba4b6470b
1 changed files with 21 additions and 13 deletions
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34
drivers/gpu/drm/drm_edid.c
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@ -4972,24 +4972,14 @@ static void drm_edid_to_eld(struct drm_connector *connector,
drm_eld_size(eld), total_sad_count);
}
/**
* drm_edid_to_sad - extracts SADs from EDID
* @edid: EDID to parse
* @sads: pointer that will be set to the extracted SADs
*
* Looks for CEA EDID block and extracts SADs (Short Audio Descriptors) from it.
*
* Note: The returned pointer needs to be freed using kfree().
*
* Return: The number of found SADs or negative number on error.
*/
int drm_edid_to_sad(const struct edid *edid, struct cea_sad **sads)
static int _drm_edid_to_sad(const struct drm_edid *drm_edid,
struct cea_sad **sads)
{
const struct cea_db *db;
struct cea_db_iter iter;
int count = 0;
cea_db_iter_edid_begin(edid, &iter);
cea_db_iter_edid_begin(drm_edid ? drm_edid->edid : NULL, &iter);
cea_db_iter_for_each(db, &iter) {
if (cea_db_tag(db) == CTA_DB_AUDIO) {
int j;
@ -5015,6 +5005,24 @@ int drm_edid_to_sad(const struct edid *edid, struct cea_sad **sads)
return count;
}
/**
* drm_edid_to_sad - extracts SADs from EDID
* @edid: EDID to parse
* @sads: pointer that will be set to the extracted SADs
*
* Looks for CEA EDID block and extracts SADs (Short Audio Descriptors) from it.
*
* Note: The returned pointer needs to be freed using kfree().
*
* Return: The number of found SADs or negative number on error.
*/
int drm_edid_to_sad(const struct edid *edid, struct cea_sad **sads)
{
struct drm_edid drm_edid;
return _drm_edid_to_sad(drm_edid_legacy_init(&drm_edid, edid), sads);
}
EXPORT_SYMBOL(drm_edid_to_sad);
/**