[Intel-gfx] [PATCH 1/4] drm/i915: Remove WaFbcDisableDpfcClockGating on IVB

[Paulo Zanoni]

2013/10/24 Ben Widawsky <benjamin.widawsky at intel.com>:
> Production IVB does not need it. I confirmed this with Art.
>
> Signed-off-by: Ben Widawsky <ben at bwidawsk.net>

Reviewed-by: Paulo Zanoni <paulo.r.zanoni at intel.com>

> ---
>  drivers/gpu/drm/i915/intel_pm.c | 10 ----------
>  1 file changed, 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index d4dd543..33ad028 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -254,12 +254,6 @@ static void ironlake_disable_fbc(struct drm_device *dev)
>                 dpfc_ctl &= ~DPFC_CTL_EN;
>                 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
>
> -               if (IS_IVYBRIDGE(dev))
> -                       /* WaFbcDisableDpfcClockGating:ivb */
> -                       I915_WRITE(ILK_DSPCLK_GATE_D,
> -                                  I915_READ(ILK_DSPCLK_GATE_D) &
> -                                  ~ILK_DPFCUNIT_CLOCK_GATE_DISABLE);
> -
>                 if (IS_HASWELL(dev))
>                         /* WaFbcDisableDpfcClockGating:hsw */
>                         I915_WRITE(HSW_CLKGATE_DISABLE_PART_1,
> @@ -295,10 +289,6 @@ static void gen7_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
>         if (IS_IVYBRIDGE(dev)) {
>                 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
>                 I915_WRITE(ILK_DISPLAY_CHICKEN1, ILK_FBCQ_DIS);
> -               /* WaFbcDisableDpfcClockGating:ivb */
> -               I915_WRITE(ILK_DSPCLK_GATE_D,
> -                          I915_READ(ILK_DSPCLK_GATE_D) |
> -                          ILK_DPFCUNIT_CLOCK_GATE_DISABLE);
>         } else {
>                 /* WaFbcAsynchFlipDisableFbcQueue:hsw */
>                 I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc->pipe),
> --
> 1.8.4.1
>
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-- 
Paulo Zanoni