diff mbox series

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

Message ID 20220712111223.13080-9-rex-bc.chen@mediatek.com (mailing list archive)
State Handled Elsewhere
Headers show
Series drm/mediatek: Add MT8195 DisplayPort driver | expand

Commit Message

Rex-BC Chen (陳柏辰) July 12, 2022, 11:12 a.m. UTC 
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 mbox series

Patch

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;