drm/xe: Add missing DG2 lrc tunings

Synchronize with i915 the DG2 tunings as of
commit 4d14d771 ("drm/i915/selftest: Fix ktime_get() and h/w access
order").

Contrary to the tuning "gang timer" for TGL, there is no quick
justification for why the read back is disabled in i915. Keep it
with that flag for now. That can be tentatively removed later when the
read values are checked.

v2: Use XEHP_FF_MODE2 instead of GEN12_FF_MODE2 (Matt Roper)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20230314003012.2600353-11-lucas.demarchi@intel.comSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/regs/xe_gt_regs.h

@@ -73,7 +73,11 @@
 #define XEHP_TILE0_ADDR_RANGE			MCR_REG(0x4900)
 #define XEHP_FLAT_CCS_BASE_ADDR			MCR_REG(0x4910)
 
+#define CHICKEN_RASTER_2			MCR_REG(0x6208)
+#define   TBIMR_FAST_CLIP			REG_BIT(5)
+
 #define GEN12_FF_MODE2				_MMIO(0x6604)
+#define XEHP_FF_MODE2				MCR_REG(0x6604)
 #define   FF_MODE2_GS_TIMER_MASK		REG_GENMASK(31, 24)
 #define   FF_MODE2_GS_TIMER_224			REG_FIELD_PREP(FF_MODE2_GS_TIMER_MASK, 224)
 #define   FF_MODE2_TDS_TIMER_MASK		REG_GENMASK(23, 16)
@@ -228,6 +232,9 @@
 #define XEHP_L3NODEARBCFG			MCR_REG(0xb0b4)
 #define   XEHP_LNESPARE				REG_BIT(19)
 
+#define XEHP_L3SQCREG5				MCR_REG(0xb158)
+#define   L3_PWM_TIMER_INIT_VAL_MASK		REG_GENMASK(9, 0)
+
 #define XEHP_L3SCQREG7				MCR_REG(0xb188)
 #define   BLEND_FILL_CACHING_OPT_DIS		REG_BIT(3)
 

drivers/gpu/drm/xe/xe_tuning.c

@@ -35,6 +35,26 @@ static const struct xe_rtp_entry lrc_tunings[] = {
 						FF_MODE2_GS_TIMER_MASK,
 						FF_MODE2_GS_TIMER_224))
 	},
+
+	/* DG2 */
+
+	{ XE_RTP_NAME("Tuning: L3 cache"),
+	  XE_RTP_RULES(PLATFORM(DG2)),
+	  XE_RTP_ACTIONS(FIELD_SET(XEHP_L3SQCREG5, L3_PWM_TIMER_INIT_VAL_MASK,
+				   REG_FIELD_PREP(L3_PWM_TIMER_INIT_VAL_MASK, 0x7f)))
+	},
+	{ XE_RTP_NAME("Tuning: TDS gang timer"),
+	  XE_RTP_RULES(PLATFORM(DG2)),
+	  /* read verification is ignored as in i915 - need to check enabling */
+	  XE_RTP_ACTIONS(FIELD_SET_NO_READ_MASK(XEHP_FF_MODE2,
+						FF_MODE2_TDS_TIMER_MASK,
+						FF_MODE2_TDS_TIMER_128))
+	},
+	{ XE_RTP_NAME("Tuning: TBIMR fast clip"),
+	  XE_RTP_RULES(PLATFORM(DG2)),
+	  XE_RTP_ACTIONS(SET(CHICKEN_RASTER_2, TBIMR_FAST_CLIP,
+			     XE_RTP_ACTION_FLAG(MASKED_REG)))
+	},
 	{}
 };