samsung-sm8650/android_kernel_samsung_sm8650-modules
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disp: msm: dp: exit stream enable on cable disconnect

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Exit stream enable on cable disconnect considering that the
controller and display modules would have transitioned to aborted
state. It is possible that the disconnect might have prevented
the link clock from being enabled, so we have to skip any register
programming in the link clock domain. We remove the unprepare
call from the DRM wrapper error handling since that path can lead
to unclocked register access when the link clock is not enabled.

Change-Id: I92595c0824193df63c2746bc8cd644f59c33604a
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>
This commit is contained in:
Tatenda Chipeperekwa
2020-05-13 15:56:50 -07:00
parent 0c5bbc2066
commit 6a68c684bd
3 changed files with 9 additions and 6 deletions
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5
msm/dp/dp_ctrl.c
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@@ -1168,6 +1168,11 @@ static int dp_ctrl_stream_on(struct dp_ctrl *dp_ctrl, struct dp_panel *panel)
ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
if (!ctrl->power_on) {
DP_DEBUG("controller powered off\n");
return -EPERM;
}
rc = dp_ctrl_enable_stream_clocks(ctrl, panel);
if (rc) {
DP_ERR("failure on stream clock enable\n");