[Intel-gfx] [PATCH 1/6] drm/i915/gen9: Add WaDisableSamplerPowerBypassForSOPingPong

[Kamble, Sagar A]

Reviewed-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>

On 9/8/2015 3:01 PM, Arun Siluvery wrote:
> Signed-off-by: Arun Siluvery <arun.siluvery at linux.intel.com>
> ---
>   drivers/gpu/drm/i915/intel_ringbuffer.c | 7 +++++++
>   1 file changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
> index d2e0b3b..0e1ed0b 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
> @@ -983,6 +983,13 @@ static int gen9_init_workarounds(struct intel_engine_cs *ring)
>   		tmp |= HDC_FORCE_CSR_NON_COHERENT_OVR_DISABLE;
>   	WA_SET_BIT_MASKED(HDC_CHICKEN0, tmp);
>   
> +	/* WaDisableSamplerPowerBypassForSOPingPong:skl,bxt */
> +	if (IS_SKYLAKE(dev) ||
> +	    (IS_BROXTON(dev) && INTEL_REVID(dev) <= BXT_REVID_B0)) {
> +		WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
> +				  GEN8_SAMPLER_POWER_BYPASS_DIS);
> +	}
> +
>   	return 0;
>   }
>