[Intel-gfx] [PATCH] drm/i915/gt: Implement WA_1406941453

[Matt Atwood]

On Thu, Jun 11, 2020 at 04:31:08PM -0700, clinton.a.taylor at intel.com wrote:
> From: Clint Taylor <clinton.a.taylor at intel.com>
> 
> Enable HW Default flip for small PL.
> 
> bspec: 52890
> bspec: 53508
> bspec: 53273
> 
> Signed-off-by: Clint Taylor <clinton.a.taylor at intel.com>
Reviewed-by: Matt Atwood <matthew.s.atwood at intel.com>
> ---
>  drivers/gpu/drm/i915/gt/intel_workarounds.c | 6 ++++++
>  drivers/gpu/drm/i915/i915_reg.h             | 1 +
>  2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> index 2da366821dda..0b9091c05e06 100644
> --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> @@ -628,6 +628,9 @@ static void tgl_ctx_workarounds_init(struct intel_engine_cs *engine,
>  	WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1,
>  			    GEN9_PREEMPT_GPGPU_LEVEL_MASK,
>  			    GEN9_PREEMPT_GPGPU_THREAD_GROUP_LEVEL);
> +
> +	/* Wa_1406941453:gen12 */
> +	WA_SET_BIT_MASKED(GEN10_SAMPLER_MODE, ENABLE_SMALLPL);
>  }
>  
>  static void
> @@ -1500,6 +1503,9 @@ static void icl_whitelist_build(struct intel_engine_cs *engine)
>  		whitelist_reg_ext(w, PS_INVOCATION_COUNT,
>  				  RING_FORCE_TO_NONPRIV_ACCESS_RD |
>  				  RING_FORCE_TO_NONPRIV_RANGE_4);
> +
> +		/* Wa_1406941453:gen12 */
> +		whitelist_reg(w, GEN10_SAMPLER_MODE);
>  		break;
>  
>  	case VIDEO_DECODE_CLASS:
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 19e1fed198c3..fbb095a94b3a 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -9223,6 +9223,7 @@ enum {
>  #define   GEN11_LSN_UNSLCVC_GAFS_HALF_SF_MAXALLOC	(1 << 7)
>  
>  #define GEN10_SAMPLER_MODE		_MMIO(0xE18C)
> +#define   ENABLE_SMALLPL			REG_BIT(15)
>  #define   GEN11_SAMPLER_ENABLE_HEADLESS_MSG	REG_BIT(5)
>  
>  /* IVYBRIDGE DPF */
> -- 
> 2.26.0
> 
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