[Intel-gfx] [PATCH 2/2] drm/i915/icl: Apply WaEnablePreemptionGranularityControlByUMD

[Rafael Antognolli]

On Tue, Mar 05, 2019 at 01:48:27PM +0100, Michał Winiarski wrote:
> There are still some cases where userspace needs to change the
> preemption granularity for compute workloads. Let's whitelist the
> per-ctx granularity control register to allow it.

We are not planning to enable it just yet but would be good to easily
enable it in the future.

Acked-by: Rafael Antognolli <rafael.antognolli at intel.com>

> Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>
> Cc: Anuj Phogat <anuj.phogat at intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Cc: Rafael Antognolli <rafael.antognolli at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/intel_workarounds.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
> index 2fba33509f4e..582f554e53f4 100644
> --- a/drivers/gpu/drm/i915/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/intel_workarounds.c
> @@ -1053,6 +1053,9 @@ static void icl_whitelist_build(struct i915_wa_list *w)
>  
>  	/* WaAllowUMDToModifySamplerMode:icl */
>  	whitelist_reg(w, GEN10_SAMPLER_MODE);
> +
> +	/* WaEnablePreemptionGranularityControlByUMD:icl */
> +	whitelist_reg(w, GEN8_CS_CHICKEN1);
>  }
>  
>  void intel_engine_init_whitelist(struct intel_engine_cs *engine)
> -- 
> 2.20.1
>