drm/i915/dg2: Introduce Wa_18017747507

WA 18017747507 applies to all DG2 skus.

BSpec: 56035, 46121, 68173

Signed-off-by: Wayne Boyer <wayne.boyer@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/20221031131509.3411195-1-wayne.boyer@intel.com

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 1b90197..dfbf093 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -498,6 +498,9 @@
 #define VF_PREEMPTION                          _MMIO(0x83a4)
 #define   PREEMPTION_VERTEX_COUNT              REG_GENMASK(15, 0)
 
+#define VFG_PREEMPTION_CHICKEN                 _MMIO(0x83b4)
+#define   POLYGON_TRIFAN_LINELOOP_DISABLE      REG_BIT(4)
+
 #define GEN8_RC6_CTX_INFO                      _MMIO(0x8504)
 
 #define XEHP_SQCM                              MCR_REG(0x8724)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index f87d4bd..8c98567 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -2975,6 +2975,9 @@ general_render_compute_wa_init(struct intel_engine_cs *engine, struct i915_wa_li
                 * Wa_22015475538:dg2
                 */
                wa_mcr_write_or(wal, LSC_CHICKEN_BIT_0_UDW, DIS_CHAIN_2XSIMD8);
+
+               /* Wa_18017747507:dg2 */
+               wa_masked_en(wal, VFG_PREEMPTION_CHICKEN, POLYGON_TRIFAN_LINELOOP_DISABLE);
        }
 }