[PATCH v2] drm/xe/ptl: Apply Wa_14023061436

[Matt Roper]

On Wed, Jan 08, 2025 at 03:13:23PM +0100, Nirmoy Das wrote:
> Enable WMTP for the BTD kernel to address Wa14023061436 by setting the
> proper TDL Chicken Bit.
> 
> v2: Apply it on engine_was[] as this register is not part of LRC(Matt)
>     Apply it for first_render_or_compute in case this gets extended to
>     compute only platforms(Matt).
> 
> Cc: Gustavo Sousa <gustavo.sousa at intel.com>
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>

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

> ---
>  drivers/gpu/drm/xe/regs/xe_gt_regs.h | 3 +++
>  drivers/gpu/drm/xe/xe_wa.c           | 5 +++++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> index 162f18e975da..b4283ac030f4 100644
> --- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> +++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> @@ -500,6 +500,9 @@
>  #define   LSC_L1_FLUSH_CTL_3D_DATAPORT_FLUSH_EVENTS_MASK	REG_GENMASK(13, 11)
>  #define   DIS_ATOMIC_CHAINING_TYPED_WRITES	REG_BIT(3)
>  
> +#define TDL_CHICKEN				XE_REG_MCR(0xe5f4, XE_REG_OPTION_MASKED)
> +#define   QID_WAIT_FOR_THREAD_NOT_RUN_DISABLE	REG_BIT(12)
> +
>  #define LSC_CHICKEN_BIT_0			XE_REG_MCR(0xe7c8)
>  #define   DISABLE_D8_D16_COASLESCE		REG_BIT(30)
>  #define   WR_REQ_CHAINING_DIS			REG_BIT(26)
> diff --git a/drivers/gpu/drm/xe/xe_wa.c b/drivers/gpu/drm/xe/xe_wa.c
> index 570fe0376402..744dba4fdb58 100644
> --- a/drivers/gpu/drm/xe/xe_wa.c
> +++ b/drivers/gpu/drm/xe/xe_wa.c
> @@ -613,6 +613,11 @@ static const struct xe_rtp_entry_sr engine_was[] = {
>  	  XE_RTP_ACTIONS(FIELD_SET(SAMPLER_MODE, SMP_WAIT_FETCH_MERGING_COUNTER,
>  				   SMP_FORCE_128B_OVERFETCH))
>  	},
> +	{ XE_RTP_NAME("14023061436"),
> +	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(3000, 3001),
> +		       FUNC(xe_rtp_match_first_render_or_compute)),
> +	  XE_RTP_ACTIONS(SET(TDL_CHICKEN, QID_WAIT_FOR_THREAD_NOT_RUN_DISABLE))
> +	},
>  
>  	{}
>  };
> -- 
> 2.46.0
> 

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