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drm/amdgpu: add helpers for baco entry and exit

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BACO - Bus Active, Chip Off

Will be used for runtime pm.  Entry will enter the BACO
state (chip off).  Exit will exit the BACO state (chip on).

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2019-10-04 12:33:09 -05:00
parent 11520f2708
commit 361dbd01a1
2 changed files with 63 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -1144,6 +1144,8 @@ bool amdgpu_device_supports_boco(struct drm_device *dev);
bool amdgpu_device_supports_baco(struct drm_device *dev);
bool amdgpu_device_is_peer_accessible(struct amdgpu_device *adev,
struct amdgpu_device *peer_adev);
int amdgpu_device_baco_enter(struct drm_device *dev);
int amdgpu_device_baco_exit(struct drm_device *dev);
/* atpx handler */
#if defined(CONFIG_VGA_SWITCHEROO)

61
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -4296,3 +4296,64 @@ static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev)
}
}
int amdgpu_device_baco_enter(struct drm_device *dev)
{
struct amdgpu_device *adev = dev->dev_private;
if (!amdgpu_device_supports_baco(adev->ddev))
return -ENOTSUPP;
if (is_support_sw_smu(adev)) {
struct smu_context *smu = &adev->smu;
int ret;
ret = smu_baco_enter(smu);
if (ret)
return ret;
return 0;
} else {
void *pp_handle = adev->powerplay.pp_handle;
const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
if (!pp_funcs ||!pp_funcs->get_asic_baco_state ||!pp_funcs->set_asic_baco_state)
return -ENOENT;
/* enter BACO state */
if (pp_funcs->set_asic_baco_state(pp_handle, 1))
return -EIO;
return 0;
}
}
int amdgpu_device_baco_exit(struct drm_device *dev)
{
struct amdgpu_device *adev = dev->dev_private;
if (!amdgpu_device_supports_baco(adev->ddev))
return -ENOTSUPP;
if (is_support_sw_smu(adev)) {
struct smu_context *smu = &adev->smu;
int ret;
ret = smu_baco_exit(smu);
if (ret)
return ret;
return 0;
} else {
void *pp_handle = adev->powerplay.pp_handle;
const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
if (!pp_funcs ||!pp_funcs->get_asic_baco_state ||!pp_funcs->set_asic_baco_state)
return -ENOENT;
/* exit BACO state */
if (pp_funcs->set_asic_baco_state(pp_handle, 0))
return -EIO;
return 0;
}
}