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drm/i915/cnl: WaPushConstantDereferenceHoldDisable 

CS sometimes hangs on 3D Push Constant dispatches with the new
deref enhancement logic in CNL.

v2: Improve the commit message (Rodrigo)

Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1503518191-19116-1-git-send-email-oscar.mateo@intel.com
This commit is contained in:
Oscar Mateo 2017-08-23 12:56:31 -07:00 committed by Rodrigo Vivi
parent 66df1014ef
commit 2cbecff412
2 changed files with 4 additions and 0 deletions
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1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -8055,6 +8055,7 @@ enum {
#define GEN7_ROW_CHICKEN2 _MMIO(0xe4f4)
#define GEN7_ROW_CHICKEN2_GT2 _MMIO(0xf4f4)
#define DOP_CLOCK_GATING_DISABLE (1<<0)
#define PUSH_CONSTANT_DEREF_DISABLE (1<<8)
#define HSW_ROW_CHICKEN3 _MMIO(0xe49c)
#define HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE (1 << 6)

3
drivers/gpu/drm/i915/intel_engine_cs.c
View File

@ -1083,6 +1083,9 @@ static int cnl_init_workarounds(struct intel_engine_cs *engine)
WA_SET_BIT(GEN9_GAMT_ECO_REG_RW_IA,
GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
/* WaPushConstantDereferenceHoldDisable:cnl */
WA_SET_BIT(GEN7_ROW_CHICKEN2, PUSH_CONSTANT_DEREF_DISABLE);
/* WaEnablePreemptionGranularityControlByUMD:cnl */
ret= wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1);
if (ret)