[Intel-gfx] [PATCH v2 17/25] drm/edid: add drm_edid helper for drm_edid_to_sad()

[Nautiyal, Ankit K]

On 5/9/2022 5:33 PM, Jani Nikula wrote:
> We'll need to propagate drm_edid everywhere.
>
> v2: Handle NULL EDID pointer (Ville, CI)
>
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>


LGTM.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>

Regards,

Ankit

> ---
>   drivers/gpu/drm/drm_edid.c | 34 +++++++++++++++++++++-------------
>   1 file changed, 21 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 61551ce0db88..dee09359bbc3 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -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);
>   
>   /**