drm/xe/xe2_lpg: Introduce performance guide changes

Add performance guide changes to Xe2_LPG.

BSpec: 72161
Signed-off-by: Shekhar Chauhan <shekhar.chauhan@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240123050552.2250699-2-shekhar.chauhan@intel.com

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)
 

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))
+	},
 	{}
 };