[Intel-gfx] [PATCH 2/2] drm/i915/mtl: Add Wa_22015279794

[Radhakrishna Sripada]

This patch adds the workaround to disable IC prefetch.

Original Author: Madhumitha Tolakanhalli Pradeep
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index c52c5f9ad9ce..47ff4ca2bd61 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1677,6 +1677,10 @@ xelpg_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
 	    IS_MTL_GRAPHICS_STEP(gt->i915, P, STEP_A0, STEP_B0))
 		wa_mcr_write_clr(wal, SARB_CHICKEN1, COMP_CKN_IN);
 
+	/* Wa_22015279794: mtl-p[a0] */
+	if (IS_MTL_GRAPHICS_STEP(gt->i915, P, STEP_A0, STEP_B0))
+		wa_mcr_masked_en(wal, GEN10_CACHE_MODE_SS,
+				 ENABLE_PREFETCH_INTO_IC);
 	/*
 	 * Unlike older platforms, we no longer setup implicit steering here;
 	 * all MCR accesses are explicitly steered.
-- 
2.34.1