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From 4007de219ef6c30adcbcedad3770a8446756a500 Mon Sep 17 00:00:00 2001
From: Paul Hsieh <paul.hsieh@amd.com>
Date: Tue, 7 May 2019 17:58:58 +0800
Subject: [PATCH 2460/2940] drm/amd/display: disable PSR/ABM before destroy
DMCU struct
[Why]
1. DMCU is not running on some platform but driver still send ABM
command. It may cause assert due to DMCU is not alive.
2. To make sure PSR disable when driver disable
[How]
1. Add dmcu_is_running in ABM struct, driver can check this flag to
determine driver should send ABM command or not.
2. Send PSR disable command when destroy PSR
Signed-off-by: Paul Hsieh <paul.hsieh@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index 5bed89547410..2a34447112e9 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -657,6 +657,9 @@ static void dcn20_init_hw(struct dc *dc)
if (dmcu != NULL)
dmcu->funcs->dmcu_init(dmcu);
+ if (abm != NULL && dmcu != NULL)
+ abm->dmcu_is_running = dmcu->funcs->is_dmcu_initialized(dmcu);
+
/* power AFMT HDMI memory TODO: may move to dis/en output save power*/
REG_WRITE(DIO_MEM_PWR_CTRL, 0);
--
2.17.1
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