[Intel-gfx] [PATCH 17/22] drm/i915/tgl: Implement Wa_1406941453

[Summers, Stuart]

On Fri, 2019-07-12 at 18:09 -0700, Lucas De Marchi wrote:
> From: Michel Thierry <michel.thierry at intel.com>
> 
> Enable Small PL for power benefit.
> 
> Signed-off-by: Michel Thierry <michel.thierry at intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>

Reviewed-by: Stuart Summers <stuart.summers at intel.com>

> ---
>  drivers/gpu/drm/i915/gt/intel_workarounds.c | 5 +++++
>  drivers/gpu/drm/i915/i915_reg.h             | 3 +++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> index 347ba16346d3..f3367339f445 100644
> --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> @@ -1285,6 +1285,11 @@ rcs_engine_wa_init(struct intel_engine_cs
> *engine, struct i915_wa_list *wal)
>  		wa_write_or(wal,
>  			    GEN12_L3SQCREG2,
>  			    GEN12_LQSC_FLUSH_COHERENT_LINES);
> +
> +		/* Wa_1406941453:tgl */
> +		wa_masked_en(wal,
> +			     SAMPLER_MODE,
> +			     SAMPLER_ENABLE_SMALL_PL);
>  	}
>  
>  	if (IS_GEN(i915, 11)) {
> diff --git a/drivers/gpu/drm/i915/i915_reg.h
> b/drivers/gpu/drm/i915/i915_reg.h
> index d048c349e07e..712616fcd6b3 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -9009,6 +9009,9 @@ enum {
>  #define   GEN9_DG_MIRROR_FIX_ENABLE	(1 << 5)
>  #define   GEN9_CCS_TLB_PREFETCH_ENABLE	(1 << 3)
>  
> +#define SAMPLER_MODE			_MMIO(0xe18c)
> +#define   SAMPLER_ENABLE_SMALL_PL	(1 << 15)
> +
>  #define GEN8_ROW_CHICKEN		_MMIO(0xe4f0)
>  #define   FLOW_CONTROL_ENABLE		(1 << 15)
>  #define   PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE	(1 << 8)
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 3270 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/intel-gfx/attachments/20190723/75f13834/attachment.bin>