[PATCH v3] drm/i915: Add Wa_14019789679

[Nitin Gote <nitin.r.gote@xxxxxxxxx>]

Wa_14019789679 implementation for MTL, ARL and DG2.

v2: Corrected condition

v3:
   - Fix indentation (Jani Nikula)
   - dword size should be 0x1 and
     initialize dword to 0 instead of MI_NOOP (Tejas)
   - Use IS_GFX_GT_IP_RANGE() (Tejas)

Bspec: 47083

Signed-off-by: Nitin Gote <nitin.r.gote@xxxxxxxxx>
---
 drivers/gpu/drm/i915/gt/intel_gpu_commands.h |  1 +
 drivers/gpu/drm/i915/gt/intel_workarounds.c  | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
index 2bd8d98d2110..7eaf7eddd25b 100644
--- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
+++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
@@ -220,6 +220,7 @@
 #define GFX_OP_DESTBUFFER_INFO	 ((0x3<<29)|(0x1d<<24)|(0x8e<<16)|1)
 #define GFX_OP_DRAWRECT_INFO     ((0x3<<29)|(0x1d<<24)|(0x80<<16)|(0x3))
 #define GFX_OP_DRAWRECT_INFO_I965  ((0x7900<<16)|0x2)
+#define CMD_3DSTATE_MESH_CONTROL ((0x3 << 29) | (0x3 << 27) | (0x0 << 24) | (0x77 << 16) | (0x1))
 
 #define XY_CTRL_SURF_INSTR_SIZE		5
 #define MI_FLUSH_DW_SIZE		3
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 09a287c1aedd..d942707381be 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -974,7 +974,12 @@ int intel_engine_emit_ctx_wa(struct i915_request *rq)
 	if (ret)
 		return ret;
 
-	cs = intel_ring_begin(rq, (wal->count * 2 + 2));
+	if (IS_GFX_GT_IP_RANGE(rq->engine->gt, IP_VER(12, 70), IP_VER(12, 74)) ||
+	    IS_DG2(rq->i915))
+		cs = intel_ring_begin(rq, (wal->count * 2 + 4));
+	else
+		cs = intel_ring_begin(rq, (wal->count * 2 + 2));
+
 	if (IS_ERR(cs))
 		return PTR_ERR(cs);
 
@@ -1004,6 +1009,13 @@ int intel_engine_emit_ctx_wa(struct i915_request *rq)
 	}
 	*cs++ = MI_NOOP;
 
+	/* Wa_14019789679 */
+	if (IS_GFX_GT_IP_RANGE(rq->engine->gt, IP_VER(12, 70), IP_VER(12, 74)) ||
+	    IS_DG2(rq->i915)) {
+		*cs++ = CMD_3DSTATE_MESH_CONTROL;
+		*cs++ = 0;
+	}
+
 	intel_uncore_forcewake_put__locked(uncore, fw);
 	spin_unlock(&uncore->lock);
 	intel_gt_mcr_unlock(wal->gt, flags);
-- 
2.25.1