[Intel-xe] [PATCH] drm/xe/xe2: Add workaround 14020013138

[Matt Roper]

On Fri, Nov 17, 2023 at 05:43:01PM +0530, Tejas Upadhyay wrote:
> This workaround applies to Xe2_LPG_MD A0
> 
> Signed-off-by: Tejas Upadhyay <tejas.upadhyay at intel.com>
> ---
>  drivers/gpu/drm/xe/regs/xe_gt_regs.h | 3 +++
>  drivers/gpu/drm/xe/xe_wa.c           | 4 ++++
>  2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> index cc27fe8fc363..5c497a10f9d7 100644
> --- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> +++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> @@ -93,6 +93,9 @@
>  #define XEHP_TILE_ADDR_RANGE(_idx)		XE_REG_MCR(0x4900 + (_idx) * 4)
>  #define XEHP_FLAT_CCS_BASE_ADDR			XE_REG_MCR(0x4910)
>  
> +#define WM_CHICKEN3				XE_REG_MCR(0x5588, XE_REG_OPTION_MASKED)
> +#define   HIZ_PLANE_COMPRESSION_DIS		REG_BIT(10)
> +
>  #define CHICKEN_RASTER_2			XE_REG_MCR(0x6208, XE_REG_OPTION_MASKED)
>  #define   TBIMR_FAST_CLIP			REG_BIT(5)
>  
> diff --git a/drivers/gpu/drm/xe/xe_wa.c b/drivers/gpu/drm/xe/xe_wa.c
> index d03e6674519f..67a6cb5086ab 100644
> --- a/drivers/gpu/drm/xe/xe_wa.c
> +++ b/drivers/gpu/drm/xe/xe_wa.c
> @@ -272,6 +272,10 @@ static const struct xe_rtp_entry_sr gt_was[] = {

According to bspec 65182, this register is part of the RCS engine's
context so this needs to be in the lrc table, not the gt table.


Matt

>  			 SET(XEHPC_L3CLOS_MASK(2), ~0),
>  			 SET(XEHPC_L3CLOS_MASK(3), ~0))
>  	},
> +	{ XE_RTP_NAME("14020013138"),
> +	  XE_RTP_RULES(GRAPHICS_VERSION(2004), GRAPHICS_STEP(A0, B0)),
> +	  XE_RTP_ACTIONS(SET(WM_CHICKEN3, HIZ_PLANE_COMPRESSION_DIS))
> +	},
>  
>  	{}
>  };
> -- 
> 2.25.1
> 

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