On Thu, Jul 25, 2019 at 05:02:26PM -0700, Lucas De Marchi wrote:
> From: Michel Thierry <michel.thie...@intel.com>
>
> Enable Small PL for power benefit.
>
> Signed-off-by: Michel Thierry <michel.thie...@intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demar...@intel.com>
> Reviewed-by: Stuart Summers <stuart.summ...@intel.com>
Reviewed-by: Radhakrishna Sripada <radhakrishna.srip...@intel.com>
> Link:
> https://patchwork.freedesktop.org/patch/msgid/20190713010940.17711-18-lucas.demar...@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 3235ef355dfd..830ccd416a29 100644
> --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> @@ -1279,6 +1279,11 @@ 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 fbbb89f6ca2f..71efb37f54a3 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -8965,6 +8965,9 @@ 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)
> --
> 2.21.0
>
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