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drm/amdgpu: ungate SMC clockgating first before suspend

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46c34bcb6a15dd85329a39a5e72c62108626acdc put all block’s clockgating
support in SMC. The sequence in suspend routine should be adjusted
accordingly, otherwise it causes asic hang.

Signed-off-by: Flora Cui <Flora.Cui@amd.com>
Reviewed-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Flora Cui 2016-02-26 10:45:25 +08:00 • committed by Alex Deucher
commit c5a93a282f
1 changed files with 13 additions and 4 deletions
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17
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -1336,14 +1336,23 @@ static int amdgpu_suspend(struct amdgpu_device *adev)
{
int i, r;
/* ungate SMC block first */
r = amdgpu_set_clockgating_state(adev, AMD_IP_BLOCK_TYPE_SMC,
AMD_CG_STATE_UNGATE);
if (r) {
DRM_ERROR("set_clockgating_state(ungate) SMC failed %d\n",r);
}
for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
if (!adev->ip_block_status[i].valid)
continue;
/* ungate blocks so that suspend can properly shut them down */
r = adev->ip_blocks[i].funcs->set_clockgating_state((void *)adev,
AMD_CG_STATE_UNGATE);
if (r) {
DRM_ERROR("set_clockgating_state(ungate) %d failed %d\n", i, r);
if (i != AMD_IP_BLOCK_TYPE_SMC) {
r = adev->ip_blocks[i].funcs->set_clockgating_state((void *)adev,
AMD_CG_STATE_UNGATE);
if (r) {
DRM_ERROR("set_clockgating_state(ungate) %d failed %d\n", i, r);
}
}
/* XXX handle errors */
r = adev->ip_blocks[i].funcs->suspend(adev);