@@ -1943,6 +1943,9 @@ static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp,
static void mtk_dp_update_plugged_status(struct mtk_dp *mtk_dp)
{
+ if (!mtk_dp->data->audio_supported || !mtk_dp->audio_enable)
+ return;
+
mutex_lock(&mtk_dp->update_plugged_status_lock);
if (mtk_dp->plugged_cb && mtk_dp->codec_dev)
mtk_dp->plugged_cb(mtk_dp->codec_dev,
@@ -2515,11 +2518,11 @@ static int mtk_dp_probe(struct platform_device *pdev)
return dev_err_probe(dev, ret,
"failed to request mediatek dptx irq\n");
- mutex_init(&mtk_dp->update_plugged_status_lock);
-
platform_set_drvdata(pdev, mtk_dp);
if (mtk_dp->data->audio_supported) {
+ mutex_init(&mtk_dp->update_plugged_status_lock);
+
ret = mtk_dp_register_audio_driver(dev);
if (ret) {
dev_err(dev, "Failed to register audio driver: %d\n",
If a controller (usually, eDP!) does not support audio, or audio is not enabled because the endpoint has no audio support, it's useless to lock a mutex only to unlock it right after because there's no .plugged_cb(). Check if the audio is supported and enabled before locking the mutex in mtk_dp_update_plugged_status(): if not, we simply return immediately. While at it, since the update_plugged_status_lock mutex would not be used if the controller doesn't support audio at all, initialize it only if `audio_supported` is true. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- drivers/gpu/drm/mediatek/mtk_dp.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)