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drm/amdgpu/display: check if ppfuncs exists before using it

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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>
This commit is contained in:
Alex Deucher 2018-05-30 09:34:23 -05:00
commit 9dac0c3fb4
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
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@ -343,7 +343,7 @@ bool dm_pp_get_clock_levels_by_type_with_latency(
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,