linux-kernel - [PATCH AUTOSEL 5.1 018/141] drm/amd/display: Disable ABM before destroy ABM struct

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Date:   Fri, 19 Jul 2019 00:00:43 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Paul Hsieh <paul.hsieh@....com>, Anthony Koo <Anthony.Koo@....com>,
        Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.1 018/141] drm/amd/display: Disable ABM before destroy ABM struct

From: Paul Hsieh <paul.hsieh@....com>

[ Upstream commit 1090d58d4815b1fcd95a80987391006c86398b4c ]

[Why]
When disable driver, OS will set backlight optimization
then do stop device.  But this flag will cause driver to
enable ABM when driver disabled.

[How]
Send ABM disable command before destroy ABM construct

Signed-off-by: Paul Hsieh <paul.hsieh@....com>
Reviewed-by: Anthony Koo <Anthony.Koo@....com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/dc/dce/dce_abm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
index da96229db53a..2959c3c9390b 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
@@ -473,6 +473,8 @@ void dce_abm_destroy(struct abm **abm)
 {
 	struct dce_abm *abm_dce = TO_DCE_ABM(*abm);
 
+	abm_dce->base.funcs->set_abm_immediate_disable(*abm);
+
 	kfree(abm_dce);
 	*abm = NULL;
 }
-- 
2.20.1