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drm/amdgpu/tonga: don't call smu_init on resume 

smu_init allocates buffers and initializes them.  It does not
touch the hw.  There is no need to do it again on resume.  It
should really be part of sw_init (and smu_fini should be part
of sw_fini), but we need the firmware sizes from the other IPs
for firmware loading so we have to wait until sw init is done
for all other IPs.

Reviewed-by: Sonny Jiang <Sonny.Jiang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2015-06-09 17:42:10 -04:00
parent 05188312e2
commit aaf4ee3c02
1 changed files with 19 additions and 6 deletions
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25
drivers/gpu/drm/amd/amdgpu/tonga_dpm.c
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@ -81,6 +81,10 @@ static int tonga_dpm_hw_init(void *handle)
mutex_lock(&adev->pm.mutex);
/* smu init only needs to be called at startup, not resume.
* It should be in sw_init, but requires the fw info gathered
* in sw_init from other IP modules.
*/
ret = tonga_smu_init(adev);
if (ret) {
DRM_ERROR("SMU initialization failed\n");
@ -107,6 +111,10 @@ static int tonga_dpm_hw_fini(void *handle)
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
mutex_lock(&adev->pm.mutex);
/* smu fini only needs to be called at teardown, not suspend.
* It should be in sw_fini, but we put it here for symmetry
* with smu init.
*/
tonga_smu_fini(adev);
mutex_unlock(&adev->pm.mutex);
return 0;
@ -114,20 +122,25 @@ static int tonga_dpm_hw_fini(void *handle)
static int tonga_dpm_suspend(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
tonga_dpm_hw_fini(adev);
return 0;
}
static int tonga_dpm_resume(void *handle)
{
int ret;
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
tonga_dpm_hw_init(adev);
mutex_lock(&adev->pm.mutex);
return 0;
ret = tonga_smu_start(adev);
if (ret) {
DRM_ERROR("SMU start failed\n");
goto fail;
}
fail:
mutex_unlock(&adev->pm.mutex);
return ret;
}
static int tonga_dpm_set_clockgating_state(void *handle,