[PATCH v4 1/1] drm/xe/xe2_lpg: Introduce performance guide changes

[Matt Roper]

On Tue, Jan 23, 2024 at 10:35:52AM +0530, Shekhar Chauhan wrote:
> Add performance guide changes to Xe2_LPG.
> 
> BSpec: 72161
> Signed-off-by: Shekhar Chauhan <shekhar.chauhan at intel.com>

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

> ---
>  drivers/gpu/drm/xe/regs/xe_gt_regs.h | 6 ++++++
>  drivers/gpu/drm/xe/xe_tuning.c       | 9 ++++++++-
>  2 files changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> index 0d4bfc35ff37..cd27480f6486 100644
> --- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> +++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> @@ -144,6 +144,9 @@
>  
>  #define GSCPSMI_BASE				XE_REG(0x880c)
>  
> +#define CCCHKNREG1				XE_REG_MCR(0x8828)
> +#define   ENCOMPPERFFIX				REG_BIT(18)
> +
>  /* Fuse readout registers for GT */
>  #define XEHP_FUSE4				XE_REG(0x9114)
>  #define   CFEG_WMTP_DISABLE			REG_BIT(20)
> @@ -289,6 +292,9 @@
>  #define XEHP_L3NODEARBCFG			XE_REG_MCR(0xb0b4)
>  #define   XEHP_LNESPARE				REG_BIT(19)
>  
> +#define L3SQCREG3				XE_REG_MCR(0xb108)
> +#define   COMPPWOVERFETCHEN			REG_BIT(28)
> +
>  #define XEHP_L3SQCREG5				XE_REG_MCR(0xb158)
>  #define   L3_PWM_TIMER_INIT_VAL_MASK		REG_GENMASK(9, 0)
>  
> diff --git a/drivers/gpu/drm/xe/xe_tuning.c b/drivers/gpu/drm/xe/xe_tuning.c
> index 53ccd338fd8c..5c83c75bc497 100644
> --- a/drivers/gpu/drm/xe/xe_tuning.c
> +++ b/drivers/gpu/drm/xe/xe_tuning.c
> @@ -37,7 +37,14 @@ static const struct xe_rtp_entry_sr gt_tunings[] = {
>  	  XE_RTP_ACTIONS(FIELD_SET(XE2LPM_L3SQCREG5, L3_PWM_TIMER_INIT_VAL_MASK,
>  				   REG_FIELD_PREP(L3_PWM_TIMER_INIT_VAL_MASK, 0x7f)))
>  	},
> -
> +	{ XE_RTP_NAME("Tuning: Compression Overfetch"),
> +	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(2004, XE_RTP_END_VERSION_UNDEFINED)),
> +	  XE_RTP_ACTIONS(CLR(CCCHKNREG1, ENCOMPPERFFIX)),
> +	},
> +	{ XE_RTP_NAME("Tuning: Enable compressible partial write overfetch in L3"),
> +	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(2004, XE_RTP_END_VERSION_UNDEFINED)),
> +	  XE_RTP_ACTIONS(SET(L3SQCREG3, COMPPWOVERFETCHEN))
> +	},
>  	{}
>  };
>  
> -- 
> 2.34.1
> 

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