[Intel-gfx] [PATCH] drm/i915: implement WADPOClockGatingDisable for LPT

[Paulo Zanoni]

2013/4/17 Paulo Zanoni <przanoni at gmail.com>:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
>
> This should prevent mode set failures on LPT.
>

Ping?

> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_pm.c |    5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 413877d..15ff0ac 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3758,6 +3758,11 @@ static void lpt_init_clock_gating(struct drm_device *dev)
>                 I915_WRITE(SOUTH_DSPCLK_GATE_D,
>                            I915_READ(SOUTH_DSPCLK_GATE_D) |
>                            PCH_LP_PARTITION_LEVEL_DISABLE);
> +
> +       /* WADPOClockGatingDisable */
> +       I915_WRITE(_TRANSA_CHICKEN1,
> +                  I915_READ(_TRANSA_CHICKEN1) |
> +                  TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
>  }
>
>  static void haswell_init_clock_gating(struct drm_device *dev)
> --
> 1.7.10.4
>



-- 
Paulo Zanoni