On Fri, 2019-07-12 at 18:09 -0700, Lucas De Marchi wrote:
> From: Michel Thierry <michel.thierry@xxxxxxxxx>
>
> Enable Small PL for power benefit.
>
> Signed-off-by: Michel Thierry <michel.thierry@xxxxxxxxx>
> Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Reviewed-by: Stuart Summers <stuart.summers@xxxxxxxxx>
> ---
> 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)
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