Set the monitor power state to DP_SET_POWER_D3 to avoid garbage.
Signed-off-by: Jitao Shi <jitao.shi@xxxxxxxxxxxx>
Signed-off-by: Bo-Chen Chen <rex-bc.chen@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_dp.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 2d2132623112..8bf8c91d662e 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -1925,6 +1925,11 @@ static void mtk_dp_bridge_atomic_disable(struct drm_bridge *bridge,
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
+ if (mtk_dp_plug_state(mtk_dp)) {
+ drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
+ usleep_range(2000, 3000);
+ }
+
mtk_dp_video_mute(mtk_dp, true);
mtk_dp->enabled = false;
--
2.18.0
