[Intel-gfx] [PATCH] drm/i915/xelp: Implement Wa_1606376872

[Matt Roper]

On Tue, Mar 07, 2023 at 12:22:38AM -0300, Gustavo Sousa wrote:
> Wa_1606376872 applies to all Xe_LP IPs.

"...except DG1"

Aside from that,

Reviewed-by: Matt Roper <matthew.d.roper at intel.com>

> 
> Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>
> ---
>  drivers/gpu/drm/i915/gt/intel_gt_regs.h     | 3 +++
>  drivers/gpu/drm/i915/gt/intel_workarounds.c | 6 +++++-
>  2 files changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> index 08d76aa06974..4aecb5a7b631 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> @@ -478,6 +478,9 @@
>  #define   HDC_FORCE_NON_COHERENT		(1 << 4)
>  #define   HDC_BARRIER_PERFORMANCE_DISABLE	(1 << 10)
>  
> +#define COMMON_SLICE_CHICKEN4			_MMIO(0x7300)
> +#define   DISABLE_TDC_LOAD_BALANCING_CALC	REG_BIT(6)
> +
>  #define GEN8_HDC_CHICKEN1			_MMIO(0x7304)
>  
>  #define GEN11_COMMON_SLICE_CHICKEN3		_MMIO(0x7304)
> diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> index 32aa1647721a..8092f289c492 100644
> --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> @@ -743,9 +743,13 @@ static void gen12_ctx_workarounds_init(struct intel_engine_cs *engine,
>  	       FF_MODE2_GS_TIMER_224,
>  	       0, false);
>  
> -	if (!IS_DG1(i915))
> +	if (!IS_DG1(i915)) {
>  		/* Wa_1806527549 */
>  		wa_masked_en(wal, HIZ_CHICKEN, HZ_DEPTH_TEST_LE_GE_OPT_DISABLE);
> +
> +		/* Wa_1606376872 */
> +		wa_masked_en(wal, COMMON_SLICE_CHICKEN4, DISABLE_TDC_LOAD_BALANCING_CALC);
> +	}
>  }
>  
>  static void dg1_ctx_workarounds_init(struct intel_engine_cs *engine,
> -- 
> 2.39.2
> 

-- 
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation