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authorAlex Deucher <alexander.deucher@amd.com>2017-05-11 19:57:41 +0200
committerAlex Deucher <alexander.deucher@amd.com>2017-05-24 22:46:01 +0200
commit2275a3a2fe9914ba6d76c8ea490da3c08342bd19 (patch)
treed5db975f0fefeacb691c63a21e348c8ba4ea2754 /drivers
parentdrm/amd/powerplay/smu7: add vblank check for mclk switching (v2) (diff)
downloadlinux-2275a3a2fe9914ba6d76c8ea490da3c08342bd19.tar.xz
linux-2275a3a2fe9914ba6d76c8ea490da3c08342bd19.zip
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: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
index 1445c51b6d05..102eb6d029fa 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
@@ -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;