From ae5037dcfeef6f90e0b352e05e45d89700cefa23 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 11 May 2017 13:57:41 -0400 Subject: [PATCH] drm/amd/powerplay/smu7: disable mclk switching for high refresh rates MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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; -- 2.30.2