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From 0acc355594273135cf21ef74c5a41e40e2a2b400 Mon Sep 17 00:00:00 2001
From: Harry Wentland <harry.wentland@amd.com>
Date: Mon, 12 Mar 2018 13:43:36 -0400
Subject: [PATCH 3780/4131] drm/amd/display: Fix null pointer when setting
backlight
Fixes: c894d9f208f9 (drm/amd/display: Fixed dim around 1sec when resume
from S3)
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index fd7db8f..68c7196 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -1973,10 +1973,12 @@ bool dc_link_set_backlight_level(const struct dc_link *link, uint32_t level,
(abm->funcs->set_backlight_level == NULL))
return false;
- if (stream->bl_pwm_level == 0)
- frame_ramp = 0;
+ if (stream) {
+ if (stream->bl_pwm_level == 0)
+ frame_ramp = 0;
- ((struct dc_stream_state *)stream)->bl_pwm_level = level;
+ ((struct dc_stream_state *)stream)->bl_pwm_level = level;
+ }
use_smooth_brightness = dmcu->funcs->is_dmcu_initialized(dmcu);
--
2.7.4
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