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

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VCN 4.0.3 does not HDP flush with RRMT enabled. Instead, mmsch
will do the HDP flush.

This change is necessary for VCN 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>
This commit is contained in:
Lijo Lazar 2023-12-11 11:18:42 +05:30 committed by Alex Deucher
parent 585e3fdb36
commit 49cfaebe48
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
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@ -1375,6 +1375,13 @@ static uint64_t vcn_v4_0_3_unified_ring_get_wptr(struct amdgpu_ring *ring)
regUVD_RB_WPTR);
}
static void vcn_v4_0_3_ring_emit_hdp_flush(struct amdgpu_ring *ring)
{
/* VCN engine access for HDP flush doesn't work when RRMT is enabled.
* This is a workaround to avoid any HDP flush through VCN ring.
*/
}
/**
* vcn_v4_0_3_unified_ring_set_wptr - set enc write pointer
*
@ -1415,6 +1422,7 @@ static const struct amdgpu_ring_funcs vcn_v4_0_3_unified_ring_vm_funcs = {
.emit_ib = vcn_v2_0_enc_ring_emit_ib,
.emit_fence = vcn_v2_0_enc_ring_emit_fence,
.emit_vm_flush = vcn_v2_0_enc_ring_emit_vm_flush,
.emit_hdp_flush = vcn_v4_0_3_ring_emit_hdp_flush,
.test_ring = amdgpu_vcn_enc_ring_test_ring,
.test_ib = amdgpu_vcn_unified_ring_test_ib,
.insert_nop = amdgpu_ring_insert_nop,