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drm/amd: Add per-ring reset for vcn v4.0.0 use

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If there is a problem requiring a reset of the VCN engine, it is better to
reset the VCN engine rather than the entire GPU.

Add a reset callback for the ring which will stop and start VCN if an
issue happens.

Link: https://lore.kernel.org/r/20250506204948.12048-3-mario.limonciello@amd.com
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mario Limonciello 2025-05-06 15:49:47 -05:00 committed by Alex Deucher
parent d1a46cdd00
commit b8b6e6f165
1 changed files with 16 additions and 1 deletions
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17
drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c
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@ -239,9 +239,9 @@ static int vcn_v4_0_sw_init(struct amdgpu_ip_block *ip_block)
adev->vcn.inst[i].pause_dpg_mode = vcn_v4_0_pause_dpg_mode;
}
/* TODO: Add queue reset mask when FW fully supports it */
adev->vcn.supported_reset =
amdgpu_get_soft_full_reset_mask(&adev->vcn.inst[0].ring_enc[0]);
adev->vcn.supported_reset |= AMDGPU_RESET_TYPE_PER_QUEUE;
if (amdgpu_sriov_vf(adev)) {
r = amdgpu_virt_alloc_mm_table(adev);
@ -1947,6 +1947,20 @@ static int vcn_v4_0_ring_patch_cs_in_place(struct amdgpu_cs_parser *p,
return 0;
}
static int vcn_v4_0_ring_reset(struct amdgpu_ring *ring, unsigned int vmid)
{
struct amdgpu_device *adev = ring->adev;
struct amdgpu_vcn_inst *vinst = &adev->vcn.inst[ring->me];
if (!(adev->vcn.supported_reset & AMDGPU_RESET_TYPE_PER_QUEUE))
return -EOPNOTSUPP;
vcn_v4_0_stop(vinst);
vcn_v4_0_start(vinst);
return amdgpu_ring_test_helper(ring);
}
static struct amdgpu_ring_funcs vcn_v4_0_unified_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
@ -1976,6 +1990,7 @@ static struct amdgpu_ring_funcs vcn_v4_0_unified_ring_vm_funcs = {
.emit_wreg = vcn_v2_0_enc_ring_emit_wreg,
.emit_reg_wait = vcn_v2_0_enc_ring_emit_reg_wait,
.emit_reg_write_reg_wait = amdgpu_ring_emit_reg_write_reg_wait_helper,
.reset = vcn_v4_0_ring_reset,
};
/**