From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 30 May 2018 09:34:23 -0500
Subject: drm/amdgpu/display: check if ppfuncs exists before using it
Git-commit: 9dac0c3fb41056ae48b93e679c2a796c4dcfa8ed
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Fixes a crash on asics without powerplay yet (e.g., vega20).
Reviewed-by: Rex Zhu<rezhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
@@ -343,7 +343,7 @@ bool dm_pp_get_clock_levels_by_type_with
struct pp_clock_levels_with_latency pp_clks = { 0 };
const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
- if (!pp_funcs->get_clock_by_type_with_latency)
+ if (!pp_funcs || !pp_funcs->get_clock_by_type_with_latency)
return false;
if (pp_funcs->get_clock_by_type_with_latency(pp_handle,