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disp: msm: dp: resend hpd notification to usermode

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This change adds robustness to hpd notification by resending
it if there was no action in 2 seconds, just in case, the
first notification didn't make it to the usermode.

Change-Id: Iaf00669ec77e8c50618ee5618735a98518ad7f1a
Signed-off-by: Rajkumar Subbiah <quic_rsubbia@quicinc.com>
This commit is contained in:
Rajkumar Subbiah
2022-08-26 15:37:26 -04:00
committed by Gerrit - the friendly Code Review server
parent 5043291e1a
commit ecaabfefc9
1 changed files with 12 additions and 2 deletions
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14
msm/dp/dp_display.c
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@@ -983,8 +983,18 @@ static int dp_display_send_hpd_notification(struct dp_display_private *dp, bool
(!!dp_display_state_is(DP_STATE_ENABLED) == hpd))
goto skip_wait;
if (!wait_for_completion_timeout(&dp->notification_comp,
HZ * 5)) {
// wait 2 seconds
if (wait_for_completion_timeout(&dp->notification_comp, HZ * 2))
goto skip_wait;
//resend notification
if (dp->mst.mst_active)
dp->mst.cbs.hpd(&dp->dp_display, hpd);
else
dp_display_send_hpd_event(dp);
// wait another 3 seconds
if (!wait_for_completion_timeout(&dp->notification_comp, HZ * 3)) {
DP_WARN("%s timeout\n", hpd ? "connect" : "disconnect");
ret = -EINVAL;
}