[PATCH v14 08/10] drm/mediatek: set monitor to DP_SET_POWER_D3 to avoid garbage

Bo-Chen Chen
2022-07-12T11:12:48Z

Set the monitor power state to DP_SET_POWER_D3 to avoid garbage.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
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 50a4159095a1..5ab646bd2bc4 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -1887,6 +1887,11 @@ 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