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Commit 2275a3a2 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amd/powerplay/smu7: disable mclk switching for high refresh rates 

Even if the vblank period would allow it, it still seems to
be problematic on some cards.

bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868



Cc: stable@vger.kernel.org
Acked-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 09be4a52

drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c

+2 −1
Original line number Diff line number Diff line
@@ -2793,7 +2793,8 @@ static int smu7_apply_state_adjust_rules(struct pp_hwmgr *hwmgr, 


	disable_mclk_switching = ((1 < info.display_count) ||

				  disable_mclk_switching_for_frame_lock ||

				  smu7_vblank_too_short(hwmgr, mode_info.vblank_time_us));

				  smu7_vblank_too_short(hwmgr, mode_info.vblank_time_us) ||

				  (mode_info.refresh_rate > 120));



	sclk = smu7_ps->performance_levels[0].engine_clock;

	mclk = smu7_ps->performance_levels[0].memory_clock;