drm/amd/display: Fix NULL ptr when calculating refresh rate
authorJerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Tue, 27 Nov 2018 15:51:12 +0000 (10:51 -0500)
committerAlex Deucher <alexander.deucher@amd.com>
Thu, 29 Nov 2018 19:42:28 +0000 (14:42 -0500)
commit58124bf8f4a6ee4c91845d3b48712e1ee8876bdc
tree3436a3bf9fe98ebf25440849451e4b5f105e0aef
parent8b955e00d4a56a36763e9349a78483515560a3ca
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