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drm/amd/powerplay/smu7: allow mclk switching with no displays 

If there are no displays attached, there is no reason to disable
mclk switching.

Fixes mclks getting set to high when there are no displays attached.

Reviewed-by: Eric Huang <JinhuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2018-02-13 14:26:54 -05:00
parent 5825acf5c9
commit 51954e1791
1 changed files with 7 additions and 4 deletions
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11
drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
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@ -2756,10 +2756,13 @@ static int smu7_apply_state_adjust_rules(struct pp_hwmgr *hwmgr,
PHM_PlatformCaps_DisableMclkSwitchingForFrameLock);
disable_mclk_switching = ((1 < info.display_count) ||
disable_mclk_switching_for_frame_lock ||
smu7_vblank_too_short(hwmgr, mode_info.vblank_time_us) ||
(mode_info.refresh_rate > 120));
if (info.display_count == 0)
disable_mclk_switching = false;
else
disable_mclk_switching = ((1 < info.display_count) ||
disable_mclk_switching_for_frame_lock ||
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;