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

[Damien Lespiau]

On Wed, Apr 17, 2013 at 06:15:49PM -0300, Paulo Zanoni wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> 
> This should prevent mode set failures on LPT.
> 
> 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);

Don't you need to do that for each pipe? (like the cpt_ version does)?

-- 
Damien