Commit 361dbd01 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu: add helpers for baco entry and exit 



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: default avatarEvan Quan <evan.quan@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 11520f27

drivers/gpu/drm/amd/amdgpu/amdgpu.h

+2 −0
Original line number Diff line number Diff line
@@ -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)

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+61 −0
Original line number Diff line number Diff line
@@ -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;

	}

}