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disp: msm: dp: skip powering down dp host in mst mode

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If DP is running in mst mode, DP host should not power down during
unprepare call as aux need keep alive to handle further hot-plug
sideband message. Unless it is a PM suspend scenario where it is
required to deinit the host.

Change-Id: I208894e1cbc75e727044c196194b0a4e3936921e
Signed-off-by: Xiaowen Wu <wxiaowen@codeaurora.org>
Signed-off-by: Sankeerth Billakanti <sbillaka@codeaurora.org>
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>
This commit is contained in:
Sankeerth Billakanti 2020-02-28 11:09:38 +05:30 • committed by Tatenda Chipeperekwa
commit 2192810d8a
1 changed files with 6 additions and 2 deletions
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8
msm/dp/dp_display.c
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@ -2324,9 +2324,13 @@ static int dp_display_unprepare(struct dp_display *dp_display, void *panel)
* Check if the power off sequence was triggered
* by a source initialated action like framework
* reboot or suspend-resume but not from normal
* hot plug.
* hot plug. If connector is in MST mode, skip
* powering down host as aux needs to be kept
* alive to handle hot-plug sideband message.
*/
if (dp_display_is_ready(dp))
if (dp_display_is_ready(dp) &&
(dp_display_state_is(DP_STATE_SUSPENDED) ||
!dp->mst.mst_active))
flags |= DP_PANEL_SRC_INITIATED_POWER_DOWN;
if (dp->active_stream_cnt)