drm/amdgpu: Add empty HDP flush function to JPEG v4.0.3

JPEG v4.0.3 doesn't support HDP flush when RRMT is enabled. Instead,
mmsch fw will do the flush.

This change is necessary for JPEG v4.0.3, no need for backward compatibility

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Jane Jian <Jane.Jian@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 585e3fdb36f59c5cfed0ae06c852dc1df22b1d60)

diff --git a/drivers/gpu/drm/amd/amdgpu/jpeg_v4_0_3.c b/drivers/gpu/drm/amd/amdgpu/jpeg_v4_0_3.c
index 04d8966423decf1879fd46e950a4724a09cfc6be..30a143ab592db866e6c14a85287ad896200024e0 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/jpeg_v4_0_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/jpeg_v4_0_3.c
@@ -621,6 +621,13 @@ static uint64_t jpeg_v4_0_3_dec_ring_get_wptr(struct amdgpu_ring *ring)
                        ring->pipe ? (0x40 * ring->pipe - 0xc80) : 0);
 }
 
+static void jpeg_v4_0_3_ring_emit_hdp_flush(struct amdgpu_ring *ring)
+{
+       /* JPEG engine access for HDP flush doesn't work when RRMT is enabled.
+        * This is a workaround to avoid any HDP flush through JPEG ring.
+        */
+}
+
 /**
  * jpeg_v4_0_3_dec_ring_set_wptr - set write pointer
  *
@@ -1072,6 +1079,7 @@ static const struct amdgpu_ring_funcs jpeg_v4_0_3_dec_ring_vm_funcs = {
        .emit_ib = jpeg_v4_0_3_dec_ring_emit_ib,
        .emit_fence = jpeg_v4_0_3_dec_ring_emit_fence,
        .emit_vm_flush = jpeg_v4_0_3_dec_ring_emit_vm_flush,
+       .emit_hdp_flush = jpeg_v4_0_3_ring_emit_hdp_flush,
        .test_ring = amdgpu_jpeg_dec_ring_test_ring,
        .test_ib = amdgpu_jpeg_dec_ring_test_ib,
        .insert_nop = jpeg_v4_0_3_dec_ring_nop,