drm/amdgpu: disable smu hw first on tear down

Otherwise, you can't disable dpm.

Tested-by and Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index fda0e57..c5e6fc5 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1437,6 +1437,30 @@ static int amdgpu_fini(struct amdgpu_device *adev)
 {
        int i, r;
 
+       /* need to disable SMC first */
+       for (i = 0; i < adev->num_ip_blocks; i++) {
+               if (!adev->ip_block_status[i].hw)
+                       continue;
+               if (adev->ip_blocks[i].type == AMD_IP_BLOCK_TYPE_SMC) {
+                       /* ungate blocks before hw fini so that we can shutdown the blocks safely */
+                       r = adev->ip_blocks[i].funcs->set_clockgating_state((void *)adev,
+                                                                           AMD_CG_STATE_UNGATE);
+                       if (r) {
+                               DRM_ERROR("set_clockgating_state(ungate) of IP block <%s> failed %d\n",
+                                         adev->ip_blocks[i].funcs->name, r);
+                               return r;
+                       }
+                       r = adev->ip_blocks[i].funcs->hw_fini((void *)adev);
+                       /* XXX handle errors */
+                       if (r) {
+                               DRM_DEBUG("hw_fini of IP block <%s> failed %d\n",
+                                         adev->ip_blocks[i].funcs->name, r);
+                       }
+                       adev->ip_block_status[i].hw = false;
+                       break;
+               }
+       }
+
        for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
                if (!adev->ip_block_status[i].hw)
                        continue;