[Intel-gfx] [PATCH 2/5] drm/i915/psr: Fix the delayed vblank w/a

[Hogander, Jouni]

On Thu, 2022-12-22 at 14:00 +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Fix the code to correctly determine whether delayed vblank
> is used or not.

Reviewed-by: Jouni Högander <jouni.hogander at intel.com>

> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_psr.c | 9 ++-------
>  1 file changed, 2 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> b/drivers/gpu/drm/i915/display/intel_psr.c
> index 9820e5fdd087..70bd4e69834c 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -1200,13 +1200,8 @@ static void intel_psr_enable_source(struct
> intel_dp *intel_dp,
>                 /* Wa_16013835468:tgl[b0+], dg1 */
>                 if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_B0,
> STEP_FOREVER) ||
>                     IS_DG1(dev_priv)) {
> -                       u16 vtotal, vblank;
> -
> -                       vtotal = crtc_state-
> >uapi.adjusted_mode.crtc_vtotal -
> -                                crtc_state-
> >uapi.adjusted_mode.crtc_vdisplay;
> -                       vblank = crtc_state-
> >uapi.adjusted_mode.crtc_vblank_end -
> -                                crtc_state-
> >uapi.adjusted_mode.crtc_vblank_start;
> -                       if (vblank > vtotal)
> +                       if (crtc_state-
> >hw.adjusted_mode.crtc_vblank_start !=
> +                           crtc_state-
> >hw.adjusted_mode.crtc_vdisplay)
>                                 intel_de_rmw(dev_priv,
> GEN8_CHICKEN_DCPR_1, 0,
>                                             
> wa_16013835468_bit_get(intel_dp));
>                 }