From: Alex Deucher Date: Thu, 29 Jun 2017 20:08:49 +0000 (-0400) Subject: drm/amdgpu: fix vblank_time when displays are off X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=beb3777682d5c296cc15a2a424f5a7a98476def0;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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: 09be4a5219 (drm/amd/powerplay/smu7: add vblank check for mclk switching (v2)) Reviewed-by: Michel Dänzer Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c index c6dba1eaefbd..8b8eda7d1703 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c @@ -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,