linux-kernel - [PATCH 08/19] drm/msm/dp: Don't delay plug-in handling when ST_DISCONNECT

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Message-Id: <20250711-hpd-refactor-v1-8-33cbac823f34@oss.qualcomm.com>
Date: Fri, 11 Jul 2025 17:58:13 -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 08/19] drm/msm/dp: Don't delay plug-in handling when
 ST_DISCONNECT_PENDING

Since there is already a return early for when the DP link is ready and
because link_ready is only set after the DP is connected and link
training has completed, the DP will already be disconnect for plug-in
handling to happen.

Thus, there is no need delay the plug-in handling until ST_DISCONNECTED
and we can drop this ST_DISCONNECT_PENDING handling.

Signed-off-by: Jessica Zhang <jessica.zhang@....qualcomm.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 1ce8051b116a..98f5274f123e 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -602,13 +602,6 @@ static int msm_dp_hpd_plug_handle(struct msm_dp_display_private *dp, u32 data)
 
 	dp->msm_dp_display.connected = true;
 
-	if (state == ST_DISCONNECT_PENDING) {
-		/* wait until ST_DISCONNECTED */
-		msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
-		mutex_unlock(&dp->event_mutex);
-		return 0;
-	}
-
 	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret) {
 		DRM_ERROR("failed to pm_runtime_resume\n");

-- 
2.50.1