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@xxxxxxxxxxxxx>
Tested-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Reviewed-by: Alexandre Mergnat <amergnat@xxxxxxxxxxxx>
Reviewed-by: CK Hu <ck.hu@xxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_dp.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 83e55f8dc84a..c1d1a882f1db 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -1948,6 +1948,9 @@ 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,
@@ -2520,11 +2523,11 @@ 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",
--
2.41.0
