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drm/msm/dp: check sink_count before update is_connected status
Link status is different from display connected status in the case
of something like an Apple dongle where the type-c plug can be
connected, and therefore the link is connected, but no sink is
connected until an HDMI cable is plugged into the dongle.
The sink_count of DPCD of dongle will increase to 1 once an HDMI
cable is plugged into the dongle so that display connected status
will become true. This checking also apply at pm_resume.
Changes in v4:
-- none
Fixes: 94e58e2d06e3 ("drm/msm/dp: reset dp controller only at boot up and pm_resume")
Reported-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Fixes: 8ede2ecc3e
("drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets")
Link: https://lore.kernel.org/r/1619048258-8717-2-git-send-email-khsieh@codeaurora.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
parent
02ded1314a
commit
d9aa6571b2
1 changed files with 8 additions and 7 deletions
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@ -586,10 +586,8 @@ static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
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mutex_lock(&dp->event_mutex);
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state = dp->hpd_state;
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if (state == ST_CONNECT_PENDING) {
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dp_display_enable(dp, 0);
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if (state == ST_CONNECT_PENDING)
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dp->hpd_state = ST_CONNECTED;
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}
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mutex_unlock(&dp->event_mutex);
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@ -669,10 +667,8 @@ static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data
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mutex_lock(&dp->event_mutex);
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state = dp->hpd_state;
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if (state == ST_DISCONNECT_PENDING) {
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dp_display_disable(dp, 0);
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if (state == ST_DISCONNECT_PENDING)
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dp->hpd_state = ST_DISCONNECTED;
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}
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mutex_unlock(&dp->event_mutex);
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@ -1272,7 +1268,12 @@ static int dp_pm_resume(struct device *dev)
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status = dp_catalog_link_is_connected(dp->catalog);
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if (status)
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/*
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* can not declared display is connected unless
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* HDMI cable is plugged in and sink_count of
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* dongle become 1
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*/
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if (status && dp->link->sink_count)
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dp->dp_display.is_connected = true;
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else
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dp->dp_display.is_connected = false;
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