drm/amdgpu: add hdp invalidation for gfx7

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
index 8fb7ebf3be3e..1b713009c5d2 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
@@ -1925,6 +1925,25 @@ static void gfx_v7_0_ring_emit_hdp_flush(struct amdgpu_ring *ring)
 }
 
 /**
+ * gfx_v7_0_ring_emit_hdp_invalidate - emit an hdp invalidate on the cp
+ *
+ * @adev: amdgpu_device pointer
+ * @ridx: amdgpu ring index
+ *
+ * Emits an hdp invalidate on the cp.
+ */
+static void gfx_v7_0_ring_emit_hdp_invalidate(struct amdgpu_ring *ring)
+{
+        amdgpu_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 3));
+        amdgpu_ring_write(ring, (WRITE_DATA_ENGINE_SEL(0) |
+                                 WRITE_DATA_DST_SEL(0) |
+                                 WR_CONFIRM));
+        amdgpu_ring_write(ring, mmHDP_DEBUG0);
+        amdgpu_ring_write(ring, 0);
+        amdgpu_ring_write(ring, 1);
+}
+
+/**
  * gfx_v7_0_ring_emit_fence_gfx - emit a fence on the gfx ring
  *
  * @adev: amdgpu_device pointer
@@ -5132,6 +5151,7 @@ static const struct amdgpu_ring_funcs gfx_v7_0_ring_funcs_gfx = {
         .emit_vm_flush = gfx_v7_0_ring_emit_vm_flush,
         .emit_gds_switch = gfx_v7_0_ring_emit_gds_switch,
         .emit_hdp_flush = gfx_v7_0_ring_emit_hdp_flush,
+        .emit_hdp_invalidate = gfx_v7_0_ring_emit_hdp_invalidate,
         .test_ring = gfx_v7_0_ring_test_ring,
         .test_ib = gfx_v7_0_ring_test_ib,
         .insert_nop = amdgpu_ring_insert_nop,
@@ -5148,6 +5168,7 @@ static const struct amdgpu_ring_funcs gfx_v7_0_ring_funcs_compute = {
         .emit_vm_flush = gfx_v7_0_ring_emit_vm_flush,
         .emit_gds_switch = gfx_v7_0_ring_emit_gds_switch,
         .emit_hdp_flush = gfx_v7_0_ring_emit_hdp_flush,
+        .emit_hdp_invalidate = gfx_v7_0_ring_emit_hdp_invalidate,
         .test_ring = gfx_v7_0_ring_test_ring,
         .test_ib = gfx_v7_0_ring_test_ib,
         .insert_nop = amdgpu_ring_insert_nop,