1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2020-21 Intel Corporation.
21 	if (host_slp_check && ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE &&  in ipc_pm_signal_hpda_doorbell()
22 	    ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE_WAIT) {  in ipc_pm_signal_hpda_doorbell()
23 		ipc_pm->pending_hpda_update = true;  in ipc_pm_signal_hpda_doorbell()
24 		dev_dbg(ipc_pm->dev,  in ipc_pm_signal_hpda_doorbell()
25 			"Pend HPDA update set. Host PM_State: %d identifier:%d",  in ipc_pm_signal_hpda_doorbell()
26 			ipc_pm->host_pm_state, identifier);  in ipc_pm_signal_hpda_doorbell()
31 		ipc_pm->pending_hpda_update = true;  in ipc_pm_signal_hpda_doorbell()
32 		dev_dbg(ipc_pm->dev, "Pending HPDA update set. identifier:%d",  in ipc_pm_signal_hpda_doorbell()
36 	ipc_pm->pending_hpda_update = false;  in ipc_pm_signal_hpda_doorbell()
39 	ipc_cp_irq_hpda_update(ipc_pm->pcie, identifier);  in ipc_pm_signal_hpda_doorbell()
47 	if (ipc_pm->cp_state == IPC_MEM_DEV_PM_ACTIVE)  in ipc_pm_link_activate()
50 	if (ipc_pm->cp_state == IPC_MEM_DEV_PM_SLEEP) {  in ipc_pm_link_activate()
51 		if (ipc_pm->ap_state == IPC_MEM_DEV_PM_SLEEP) {  in ipc_pm_link_activate()
53 			ipc_cp_irq_sleep_control(ipc_pm->pcie,  in ipc_pm_link_activate()
55 			ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE_WAIT;  in ipc_pm_link_activate()
60 		if (ipc_pm->ap_state == IPC_MEM_DEV_PM_ACTIVE_WAIT)  in ipc_pm_link_activate()
67 	/* link is not ready */  in ipc_pm_link_activate()
75 	if (ipc_pm->ap_state != IPC_MEM_DEV_PM_ACTIVE) {  in ipc_pm_wait_for_device_active()
82 		set_bit(0, &ipc_pm->host_sleep_pend);  in ipc_pm_wait_for_device_active()
88 		   (&ipc_pm->host_sleep_complete,  in ipc_pm_wait_for_device_active()
90 			dev_err(ipc_pm->dev,  in ipc_pm_wait_for_device_active()
91 				"PM timeout. Expected State:%d. Actual: %d",  in ipc_pm_wait_for_device_active()
92 				IPC_MEM_DEV_PM_ACTIVE, ipc_pm->ap_state);  in ipc_pm_wait_for_device_active()
105 	clear_bit(0, &ipc_pm->host_sleep_pend);  in ipc_pm_wait_for_device_active()
116 	 * -> signal SLEEP__ACK to CP  in ipc_pm_on_link_sleep()
118 	ipc_pm->cp_state = IPC_MEM_DEV_PM_SLEEP;  in ipc_pm_on_link_sleep()
119 	ipc_pm->ap_state = IPC_MEM_DEV_PM_SLEEP;  in ipc_pm_on_link_sleep()
121 	ipc_cp_irq_sleep_control(ipc_pm->pcie, IPC_MEM_DEV_PM_SLEEP);  in ipc_pm_on_link_sleep()
126 	ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE;  in ipc_pm_on_link_wake()
129 		ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE;  in ipc_pm_on_link_wake()
131 		ipc_cp_irq_sleep_control(ipc_pm->pcie, IPC_MEM_DEV_PM_ACTIVE);  in ipc_pm_on_link_wake()
134 		if (test_bit(CONSUME_STATE, &ipc_pm->host_sleep_pend))  in ipc_pm_on_link_wake()
135 			complete(&ipc_pm->host_sleep_complete);  in ipc_pm_on_link_wake()
144 	if (ipc_pm->pending_hpda_update &&  in ipc_pm_on_link_wake()
145 	    ipc_pm->host_pm_state == IPC_MEM_HOST_PM_ACTIVE)  in ipc_pm_on_link_wake()
156 	new_cond = ipc_pm->pm_cond;  in ipc_pm_trigger()
157 	old_cond = ipc_pm->pm_cond;  in ipc_pm_trigger()
165 	case IPC_PM_UNIT_LINK: /* Device link state. */  in ipc_pm_trigger()
166 		new_cond.link = active;  in ipc_pm_trigger()
169 	case IPC_PM_UNIT_HS: /* Host sleep trigger requires Link. */  in ipc_pm_trigger()
180 		link_active = old_cond.link == IPC_PM_ACTIVE;  in ipc_pm_trigger()
184 	ipc_pm->pm_cond = new_cond;  in ipc_pm_trigger()
186 	if (new_cond.link)  in ipc_pm_trigger()
191 	if (old_cond.link == IPC_PM_SLEEP && new_cond.raw) {  in ipc_pm_trigger()
196 	link_active = old_cond.link == IPC_PM_ACTIVE;  in ipc_pm_trigger()
205 	if (ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE) {  in ipc_pm_prepare_host_sleep()
206 		dev_err(ipc_pm->dev, "host_pm_state=%d\tExpected to be: %d",  in ipc_pm_prepare_host_sleep()
207 			ipc_pm->host_pm_state, IPC_MEM_HOST_PM_ACTIVE);  in ipc_pm_prepare_host_sleep()
211 	ipc_pm->host_pm_state = IPC_MEM_HOST_PM_SLEEP_WAIT_D3;  in ipc_pm_prepare_host_sleep()
218 	if (ipc_pm->host_pm_state != IPC_MEM_HOST_PM_SLEEP) {  in ipc_pm_prepare_host_active()
219 		dev_err(ipc_pm->dev, "host_pm_state=%d\tExpected to be: %d",  in ipc_pm_prepare_host_active()
220 			ipc_pm->host_pm_state, IPC_MEM_HOST_PM_SLEEP);  in ipc_pm_prepare_host_active()
225 	ipc_pm->host_pm_state = IPC_MEM_HOST_PM_ACTIVE_WAIT;  in ipc_pm_prepare_host_active()
233 		ipc_pm->ap_state = IPC_MEM_DEV_PM_SLEEP;  in ipc_pm_set_s2idle_sleep()
234 		ipc_pm->cp_state = IPC_MEM_DEV_PM_SLEEP;  in ipc_pm_set_s2idle_sleep()
235 		ipc_pm->device_sleep_notification = IPC_MEM_DEV_PM_SLEEP;  in ipc_pm_set_s2idle_sleep()
237 		ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE;  in ipc_pm_set_s2idle_sleep()
238 		ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE;  in ipc_pm_set_s2idle_sleep()
239 		ipc_pm->device_sleep_notification = IPC_MEM_DEV_PM_ACTIVE;  in ipc_pm_set_s2idle_sleep()
240 		ipc_pm->pm_cond.link = IPC_PM_ACTIVE;  in ipc_pm_set_s2idle_sleep()
246 	if (cp_pm_req == ipc_pm->device_sleep_notification)  in ipc_pm_dev_slp_notification()
249 	ipc_pm->device_sleep_notification = cp_pm_req;  in ipc_pm_dev_slp_notification()
252 	switch (ipc_pm->cp_state) {  in ipc_pm_dev_slp_notification()
259 			/* Inform the PM that the device link can go down. */  in ipc_pm_dev_slp_notification()
264 			dev_err(ipc_pm->dev,  in ipc_pm_dev_slp_notification()
265 				"loc-pm=%d active: confused req-pm=%d",  in ipc_pm_dev_slp_notification()
266 				ipc_pm->cp_state, cp_pm_req);  in ipc_pm_dev_slp_notification()
274 			/* Inform the PM that the device link is active. */  in ipc_pm_dev_slp_notification()
282 			dev_err(ipc_pm->dev,  in ipc_pm_dev_slp_notification()
283 				"loc-pm=%d sleep: confused req-pm=%d",  in ipc_pm_dev_slp_notification()
284 				ipc_pm->cp_state, cp_pm_req);  in ipc_pm_dev_slp_notification()
290 		dev_err(ipc_pm->dev, "confused loc-pm=%d, req-pm=%d",  in ipc_pm_dev_slp_notification()
291 			ipc_pm->cp_state, cp_pm_req);  in ipc_pm_dev_slp_notification()
300 	struct iosm_imem *ipc_imem = ipc_protocol->imem;  in ipc_pm_init()
301 	struct iosm_pm *ipc_pm = &ipc_protocol->pm;  in ipc_pm_init()
303 	ipc_pm->pcie = ipc_imem->pcie;  in ipc_pm_init()
304 	ipc_pm->dev = ipc_imem->dev;  in ipc_pm_init()
306 	ipc_pm->pm_cond.irq = IPC_PM_SLEEP;  in ipc_pm_init()
307 	ipc_pm->pm_cond.hs = IPC_PM_SLEEP;  in ipc_pm_init()
308 	ipc_pm->pm_cond.link = IPC_PM_ACTIVE;  in ipc_pm_init()
310 	ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE;  in ipc_pm_init()
311 	ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE;  in ipc_pm_init()
312 	ipc_pm->host_pm_state = IPC_MEM_HOST_PM_ACTIVE;  in ipc_pm_init()
314 	/* Create generic wait-for-completion handler for Host Sleep  in ipc_pm_init()
317 	init_completion(&ipc_pm->host_sleep_complete);  in ipc_pm_init()
322 	clear_bit(0, &ipc_pm->host_sleep_pend);  in ipc_pm_init()
330 	struct iosm_pm *ipc_pm = &proto->pm;  in ipc_pm_deinit()
332 	complete(&ipc_pm->host_sleep_complete);  in ipc_pm_deinit()