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disp: msm: sde: avoid rc restart when triggered from panel dead

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This change prevents scheduling of rc_restart in case of
panel dead. This early return is required to avoid the list
add corruption when a race condition happens between event
thread and commit thread. When event thread is handling
display failure notification if the virt_enable arrives in
commit thread it will reinizialize kthread for
delayed_off_work without deactivating the existing list
which leads to linkage corruption.

Change-Id: I41d08cd47ba6f887f0860e52bcddf414085524bb
Signed-off-by: Mahadevan <mahap@codeaurora.org>
This commit is contained in:
Mahadevan 2021-01-20 17:54:49 +05:30
commit 08d04c2f3b
1 changed files with 5 additions and 1 deletions
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6
msm/sde/sde_encoder.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2014-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2014-2021, The Linux Foundation. All rights reserved.
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*
@ -1626,6 +1626,10 @@ static void _sde_encoder_rc_restart_delayed(struct sde_encoder_virt *sde_enc,
unsigned int lp, idle_pc_duration;
struct msm_drm_thread *disp_thread;
/* return early if called from esd thread */
if (!sde_enc->delay_kickoff)
return;
/* set idle timeout based on master connector's lp value */
if (sde_enc->cur_master)
lp = sde_connector_get_lp(