linux-kernel - [PATCH] drm/msm/dp: signal audio plugged change at dp_pm

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Message-Id: <1626992117-28887-1-git-send-email-khsieh@codeaurora.org>
Date:   Thu, 22 Jul 2021 15:15:17 -0700
From:   Kuogee Hsieh <khsieh@...eaurora.org>
To:     robdclark@...il.com, sean@...rly.run, swboyd@...omium.org,
        vkoul@...nel.org, agross@...nel.org, bjorn.andersson@...aro.org
Cc:     abhinavk@...eaurora.org, aravindh@...eaurora.org,
        khsieh@...eaurora.org, freedreno@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm/msm/dp: signal audio plugged change at dp_pm_resume

There is a scenario that dp cable is unplugged from DUT during system
suspended  will cause audio option state does not match real connection
state. Fix this problem by Signaling audio plugged change with realtime
connection status at dp_pm_resume() so that audio option will be in
correct state after system resumed.

Fixes: bd52cfedb5a8 ("drm/msm/dp: power off DP phy at suspend")
Signed-off-by: Kuogee Hsieh <khsieh@...eaurora.org>
---
 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 78c5301..2b660e9 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1339,6 +1339,10 @@ static int dp_pm_resume(struct device *dev)
 	else
 		dp->dp_display.is_connected = false;
 
+	dp_display_handle_plugged_change(g_dp_display,
+				dp->dp_display.is_connected);
+
+
 	mutex_unlock(&dp->event_mutex);
 
 	return 0;
-- 
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