linux-kernel - [PATCH 10/19] drm/msm/dp: Check if DP is disconnected in atomic post

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Message-Id: <20250711-hpd-refactor-v1-10-33cbac823f34@oss.qualcomm.com>
Date: Fri, 11 Jul 2025 17:58:15 -0700
From: Jessica Zhang <jessica.zhang@....qualcomm.com>
To: Rob Clark <robin.clark@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Dmitry Baryshkov <lumag@...nel.org>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Yongxing Mou <quic_yongmou@...cinc.com>
Subject: [PATCH 10/19] drm/msm/dp: Check if DP is disconnected in atomic
 post_disable()

Since the hpd_state is unused, change the "wrong hpd_state" debug log in
atomic post_disable() to log if the DP cable is disconnected.

Signed-off-by: Jessica Zhang <jessica.zhang@....qualcomm.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 6535c1cccf84..4c9a515648bc 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1643,10 +1643,8 @@ void msm_dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge,
 
 	mutex_lock(&msm_dp_display->event_mutex);
 
-	hpd_state = msm_dp_display->hpd_state;
-	if (hpd_state != ST_DISCONNECT_PENDING && hpd_state != ST_CONNECTED)
-		drm_dbg_dp(dp->drm_dev, "type=%d wrong hpd_state=%d\n",
-			   dp->connector_type, hpd_state);
+	if (!dp->connected)
+		drm_dbg_dp(dp->drm_dev, "type=%d is disconnected\n", dp->connector_type);
 
 	msm_dp_display_disable(msm_dp_display);
 

-- 
2.50.1