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From b2de13946e260202562b4ce546fadad7d0893a3e Mon Sep 17 00:00:00 2001
From: "Jerry (Fangzhi) Zuo" <Jerry.Zuo@amd.com>
Date: Tue, 27 Nov 2018 10:51:12 -0500
Subject: [PATCH 0871/2940] drm/amd/display: Fix NULL ptr when calculating
refresh rate
Calculate preferred refresh rate only when preferred mode exists.
Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e40784bc532b..650d3906f8b0 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2866,7 +2866,7 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
bool native_mode_found = false;
bool scale = dm_state ? (dm_state->scaling != RMX_OFF) : false;
int mode_refresh;
- int preferred_refresh;
+ int preferred_refresh = 0;
struct dc_sink *sink = NULL;
if (aconnector == NULL) {
@@ -2920,13 +2920,12 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
decide_crtc_timing_for_drm_display_mode(
&mode, preferred_mode,
dm_state ? (dm_state->scaling != RMX_OFF) : false);
+ preferred_refresh = drm_mode_vrefresh(preferred_mode);
}
if (!dm_state)
drm_mode_set_crtcinfo(&mode, 0);
- preferred_refresh = drm_mode_vrefresh(preferred_mode);
-
/*
* If scaling is enabled and refresh rate didn't change
* we copy the vic and polarities of the old timings
--
2.17.1
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