drm/amdgpu: add hdp invalidation for sdma v2_4

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, 8 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
index 0e246ff6734c..134d5d0bb77f 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
@@ -300,6 +300,13 @@ static void sdma_v2_4_ring_emit_hdp_flush(struct amdgpu_ring *ring)
                           SDMA_PKT_POLL_REGMEM_DW5_INTERVAL(10)); /* retry count, poll interval */
 }
 
+static void sdma_v2_4_ring_emit_hdp_invalidate(struct amdgpu_ring *ring)
+{
+        amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_SRBM_WRITE) |
+                          SDMA_PKT_SRBM_WRITE_HEADER_BYTE_EN(0xf));
+        amdgpu_ring_write(ring, mmHDP_DEBUG0);
+        amdgpu_ring_write(ring, 1);
+}
 /**
  * sdma_v2_4_ring_emit_fence - emit a fence on the DMA ring
  *
@@ -1291,6 +1298,7 @@ static const struct amdgpu_ring_funcs sdma_v2_4_ring_funcs = {
         .emit_fence = sdma_v2_4_ring_emit_fence,
         .emit_vm_flush = sdma_v2_4_ring_emit_vm_flush,
         .emit_hdp_flush = sdma_v2_4_ring_emit_hdp_flush,
+        .emit_hdp_invalidate = sdma_v2_4_ring_emit_hdp_invalidate,
         .test_ring = sdma_v2_4_ring_test_ring,
         .test_ib = sdma_v2_4_ring_test_ib,
         .insert_nop = sdma_v2_4_ring_insert_nop,