[PATCH v2] drm/xe/xe2: Add workaround 14021402888

[Ghimiray, Himal Prasad]

On 18-04-2024 16:45, Bommu Krishnaiah wrote:
> This workaround applies to Graphics 20.01 as RCS engine workaround
>
> Signed-off-by: Bommu Krishnaiah <krishnaiah.bommu at intel.com>
> Cc: Tejas Upadhyay <tejas.upadhyay at intel.com>
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
> ---
>   drivers/gpu/drm/xe/regs/xe_gt_regs.h | 1 +
>   drivers/gpu/drm/xe/xe_wa.c           | 4 ++++
>   2 files changed, 5 insertions(+)
>
> diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> index 94445810ccc9..23c302af4cd5 100644
> --- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> +++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> @@ -350,6 +350,7 @@
>   
>   #define HALF_SLICE_CHICKEN7				XE_REG_MCR(0xe194, XE_REG_OPTION_MASKED)
>   #define   DG2_DISABLE_ROUND_ENABLE_ALLOW_FOR_SSLA	REG_BIT(15)
> +#define   CLEAR_OPTIMIZATION_DISABLE			REG_BIT(6)
>   
>   #define CACHE_MODE_SS				XE_REG_MCR(0xe420, XE_REG_OPTION_MASKED)
>   #define   DISABLE_ECC				REG_BIT(5)
> diff --git a/drivers/gpu/drm/xe/xe_wa.c b/drivers/gpu/drm/xe/xe_wa.c
> index 632bd9066f8d..31e140968f4a 100644
> --- a/drivers/gpu/drm/xe/xe_wa.c
> +++ b/drivers/gpu/drm/xe/xe_wa.c
> @@ -534,6 +534,10 @@ static const struct xe_rtp_entry_sr engine_was[] = {
>   		       FUNC(xe_rtp_match_first_render_or_compute)),
>   	  XE_RTP_ACTIONS(SET(LSC_CHICKEN_BIT_0, WR_REQ_CHAINING_DIS))
>   	},
> +	{ XE_RTP_NAME("14021402888"),
> +	  XE_RTP_RULES(GRAPHICS_VERSION(2001), ENGINE_CLASS(RENDER)),
> +	  XE_RTP_ACTIONS(SET(HALF_SLICE_CHICKEN7, CLEAR_OPTIMIZATION_DISABLE))
> +	},


LGTM.

Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>


>   
>   	/* Xe2_HPM */
>