On 30/06/17 05:16 AM, Alex Deucher wrote:
> 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))
> Signed-off-by: Alex Deucher
> Cc: sta...@vger.kernel.org
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
> index c6dba1e..8b8eda7 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 = 0x;
>
> if (adev->mode_info.num_crtc &&
> adev->mode_info.mode_config_initialized) {
> list_for_each_entry(crtc,
>
Reviewed-by: Michel Dänzer
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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