Commit beb37776 authored by Alex Deucher's avatar Alex Deucher

drm/amdgpu: fix vblank_time when displays are off

If the displays are off, set the vblank time to max to make
sure mclk switching is enabled.  Avoid mclk getting set
to high when no displays are attached.

bug: https://bugs.freedesktop.org/show_bug.cgi?id=101528
fixes: 09be4a52 (drm/amd/powerplay/smu7: add vblank check for mclk switching (v2))
Reviewed-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent 6b5defd6
......@@ -838,6 +838,9 @@ static int amdgpu_cgs_get_active_displays_info(struct cgs_device *cgs_device,
return -EINVAL;
mode_info = info->mode_info;
if (mode_info)
/* if the displays are off, vblank time is max */
mode_info->vblank_time_us = 0xffffffff;
if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
list_for_each_entry(crtc,
......
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