On Mon, Oct 10, 2016 at 5:30 AM, Rex Zhu <Rex.Zhu at amd.com> wrote:
> Change-Id: If0f10dc8002ef8b923177cbf36d0d76316bd017c
> Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.c | 14 ++++++++------
> 1 file changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.c
> index fe36caf..14f57d9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.c
> @@ -113,24 +113,26 @@ void amdgpu_dpm_print_ps_status(struct amdgpu_device *adev,
> printk("\n");
> }
>
> +
> u32 amdgpu_dpm_get_vblank_time(struct amdgpu_device *adev)
> {
> struct drm_device *dev = adev->ddev;
> struct drm_crtc *crtc;
> struct amdgpu_crtc *amdgpu_crtc;
> - u32 line_time_us, vblank_lines;
> + u32 vblank_in_pixels;
> u32 vblank_time_us = 0xffffffff; /* if the displays are off, vblank time is max */
>
> if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
> list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
> amdgpu_crtc = to_amdgpu_crtc(crtc);
> if (crtc->enabled && amdgpu_crtc->enabled && amdgpu_crtc->hw_mode.clock) {
> - line_time_us = (amdgpu_crtc->hw_mode.crtc_htotal * 1000) /
> - amdgpu_crtc->hw_mode.clock;
> - vblank_lines = amdgpu_crtc->hw_mode.crtc_vblank_end -
> + vblank_in_pixels =
> + amdgpu_crtc->hw_mode.crtc_htotal *
> + (amdgpu_crtc->hw_mode.crtc_vblank_end -
> amdgpu_crtc->hw_mode.crtc_vdisplay +
> - (amdgpu_crtc->v_border * 2);
> - vblank_time_us = vblank_lines * line_time_us;
> + (amdgpu_crtc->v_border * 2));
> +
> + vblank_time_us = vblank_in_pixels * 1000 / amdgpu_crtc->hw_mode.clock;
> break;
> }
> }
> --
> 1.9.1
>
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