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 --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 + drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 61 ++++++++++++++++++++++ 2 files changed, 63 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 186135ea6033..64bc5771b34f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -1145,6 +1145,8 @@ 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) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 45c196845497..7195ef83ddba 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -4299,3 +4299,64 @@ 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; + } +}