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Commit c0b730d5 authored by Mika Kuoppala's avatar Mika Kuoppala Committed by Mika Kuoppala
Browse files

drm/i915/kbl: Add WaDisableDynamicCreditSharing 



Bspec states that we need to turn off dynamic credit
sharing on kbl revid a0 and b0. This happens by writing bit 28
on 0x4ab8.

References: HSD#2225601, HSD#2226938, HSD#2225763
Signed-off-by: default avatarMika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-15-git-send-email-mika.kuoppala@intel.com
parent 8aeb7f62

drivers/gpu/drm/i915/i915_reg.h

+3 −0
Original line number Diff line number Diff line
@@ -1672,6 +1672,9 @@ enum skl_disp_power_wells { 


#define GEN7_TLB_RD_ADDR	_MMIO(0x4700)



#define GAMT_CHKN_BIT_REG	_MMIO(0x4ab8)

#define   GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING	(1<<28)



#if 0

#define PRB0_TAIL	_MMIO(0x2030)

#define PRB0_HEAD	_MMIO(0x2034)

drivers/gpu/drm/i915/intel_ringbuffer.c

+5 −0
Original line number Diff line number Diff line
@@ -1199,6 +1199,11 @@ static int kbl_init_workarounds(struct intel_engine_cs *engine) 
	I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) |

				   GEN9_GAPS_TSV_CREDIT_DISABLE));



	/* WaDisableDynamicCreditSharing:kbl */

	if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0))

		WA_SET_BIT(GAMT_CHKN_BIT_REG,

			   GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING);



	/* WaDisableFenceDestinationToSLM:kbl (pre-prod) */

	if (IS_KBL_REVID(dev_priv, KBL_REVID_A0, KBL_REVID_A0))

		WA_SET_BIT_MASKED(HDC_CHICKEN0,