[PATCH v6 26/29] drm/msm/dp: mark the SST bridge disconnected when mst is active

[Yongxing Mou <yongxing.mou@oss.qualcomm.com>]

From: Abhinav Kumar <quic_abhinavk@quicinc.com>

The bridge detect function is only applicable for SST. In MST mode,
connector detection is handled by MST bridges. Skip detection for the
SST bridge when MST is active, matching the behavior of other DP MST
implementations.

Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Yongxing Mou <yongxing.mou@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 22b925277462..f350c1d03b06 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -959,6 +959,10 @@ enum drm_connector_status msm_dp_bridge_detect(struct drm_bridge *bridge,
 	priv = container_of(dp, struct msm_dp_display_private, msm_dp_display);
 
 	guard(mutex)(&priv->plugged_lock);
+
+	if (dp->mst_active)
+		return status;
+
 	ret = pm_runtime_resume_and_get(&dp->pdev->dev);
 	if (ret) {
 		DRM_ERROR("failed to pm_runtime_resume\n");

-- 
2.43.0