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drm/amdgpu: make audio dev's D-state transition PMFW-aware

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To correctly kick into BACO state, the audio dev's D-state
transition(D0->D3) needs to be PMFW-aware. So, if the audio
dev entered D3 state prior to our driver, we need to bring
it back to D0 state and make sure there will be a D-state
transition on runpm suspend.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Evan Quan
2021-05-25 10:28:04 +08:00
committed by Alex Deucher
parent 13d75eadfa
commit 415e51bdcf
1 changed files with 42 additions and 0 deletions
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42
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
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@@ -124,6 +124,22 @@ void amdgpu_register_gpu_instance(struct amdgpu_device *adev)
mutex_unlock(&mgpu_info.mutex);
}
static void amdgpu_get_audio_func(struct amdgpu_device *adev)
{
struct pci_dev *p = NULL;
p = pci_get_domain_bus_and_slot(pci_domain_nr(adev->pdev->bus),
adev->pdev->bus->number, 1);
if (p) {
pm_runtime_get_sync(&p->dev);
pm_runtime_mark_last_busy(&p->dev);
pm_runtime_put_autosuspend(&p->dev);
pci_dev_put(p);
}
}
/**
* amdgpu_driver_load_kms - Main load function for KMS.
*
@@ -213,9 +229,35 @@ int amdgpu_driver_load_kms(struct amdgpu_device *adev, unsigned long flags)
DPM_FLAG_MAY_SKIP_RESUME);
pm_runtime_use_autosuspend(dev->dev);
pm_runtime_set_autosuspend_delay(dev->dev, 5000);
pm_runtime_allow(dev->dev);
pm_runtime_mark_last_busy(dev->dev);
pm_runtime_put_autosuspend(dev->dev);
/*
* For runpm implemented via BACO, PMFW will handle the
* timing for BACO in and out:
* - put ASIC into BACO state only when both video and
* audio functions are in D3 state.
* - pull ASIC out of BACO state when either video or
* audio function is in D0 state.
* Also, at startup, PMFW assumes both functions are in
* D0 state.
*
* So if snd driver was loaded prior to amdgpu driver
* and audio function was put into D3 state, there will
* be no PMFW-aware D-state transition(D0->D3) on runpm
* suspend. Thus the BACO will be not correctly kicked in.
*
* Via amdgpu_get_audio_func(), the audio dev is put
* into D0 state. Then there will be a PMFW-aware D-state
* transition(D0->D3) on runpm suspend.
*/
if (amdgpu_device_supports_baco(dev) &&
!(adev->flags & AMD_IS_APU) &&
(adev->asic_type >= CHIP_NAVI10))
amdgpu_get_audio_func(adev);
}
if (amdgpu_acpi_smart_shift_update(dev, AMDGPU_SS_DRV_LOAD))