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disp: msm: dp: abort aux before going to dp suspend

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During resume, DP uses AUX to perform various functionalities
like DPCD/EDID read or link training etc. This involves other
hardware modules as well like USB and Charger. In a situation
like continuous suspend/resume, while DP is processing resume,
suspend can trigger resulting in dependent hardware modules
to go to sleep. As AUX communication is hardware interrupt
based, this can result in unstable system.

Abort all functionalities before going to suspend to
avoid unnecessary AUX and other functionality failures.

Change-Id: Id52d408270232adf7258a7eb064ee969eba4be71
Signed-off-by: Sankeerth Billakanti <sbillaka@codeaurora.org>
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>
This commit is contained in:
Tatenda Chipeperekwa
2019-11-08 12:55:44 +05:30
parent cf7ed76bdd
commit 3e26909b0a
6 changed files with 45 additions and 13 deletions
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4
msm/dp/dp_ctrl.h
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@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
*/
#ifndef _DP_CTRL_H_
@@ -19,7 +19,7 @@ struct dp_ctrl {
int (*on)(struct dp_ctrl *dp_ctrl, bool mst_mode, bool fec_en,
bool dsc_en, bool shallow);
void (*off)(struct dp_ctrl *dp_ctrl);
void (*abort)(struct dp_ctrl *dp_ctrl);
void (*abort)(struct dp_ctrl *dp_ctrl, bool abort);
void (*isr)(struct dp_ctrl *dp_ctrl);
bool (*handle_sink_request)(struct dp_ctrl *dp_ctrl);
void (*process_phy_test_request)(struct dp_ctrl *dp_ctrl);