[PATCH 12/12] drm/amdgpu: put the SMC into the proper state on suspend

[Alex Deucher]

Suspend is used for S3/S4, GPU reset, and PCI shutdown.  In
each case, we need to put the SMC into the proper state
in order to resume or reload correctly.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 4425ff06ecc4..bb4260648a97 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2174,6 +2174,39 @@ static int amdgpu_device_ip_suspend_phase2(struct amdgpu_device *adev)
 			DRM_ERROR("suspend of IP block <%s> failed %d\n",
 				  adev->ip_blocks[i].version->funcs->name, r);
 		}
+		/* handle putting the SMC in the appropriate state */
+		if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC) {
+			enum pp_mp1_state mp1_state = PP_MP1_STATE_NONE;
+
+			if (adev->in_gpu_reset) {
+				switch (amdgpu_asic_reset_method(adev)) {
+				case AMD_RESET_METHOD_MODE1:
+				case AMD_RESET_METHOD_BACO:
+					mp1_state = PP_MP1_STATE_SHUTDOWN;
+					break;
+				case AMD_RESET_METHOD_MODE2:
+					mp1_state = PP_MP1_STATE_RESET;
+					break;
+				default:
+					mp1_state = PP_MP1_STATE_NONE;
+					break;
+				}
+			} else if (adev->in_gpu_shutdown) {
+				mp1_state = PP_MP1_STATE_UNLOAD;
+			}
+			if (is_support_sw_smu(adev)) {
+				/* todo */
+			} else if (adev->powerplay.pp_funcs &&
+				   adev->powerplay.pp_funcs->set_mp1_state) {
+				r = adev->powerplay.pp_funcs->set_mp1_state(
+					adev->powerplay.pp_handle,
+					mp1_state);
+				if (r) {
+					DRM_ERROR("SMC failed to set mp1 state %d, %d\n",
+						  mp1_state, r);
+				}
+			}
+		}
 	}
 
 	return 0;
-- 
2.20.1