amdxdna_pm.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2025, Advanced Micro Devices, Inc.
 4 */
 5
 6#include <drm/amdxdna_accel.h>
 7#include <drm/drm_drv.h>
 8#include <linux/pm_runtime.h>
 9
10#include "amdxdna_pm.h"
11
12#define AMDXDNA_AUTOSUSPEND_DELAY	5000 /* milliseconds */
13
14int amdxdna_pm_suspend(struct device *dev)
15{
16	struct amdxdna_dev *xdna = to_xdna_dev(dev_get_drvdata(dev));
17	int ret = -EOPNOTSUPP;
18
19	guard(mutex)(&xdna->dev_lock);
20	if (xdna->dev_info->ops->suspend)
21		ret = xdna->dev_info->ops->suspend(xdna);
22
23	XDNA_DBG(xdna, "Suspend done ret %d", ret);
24	return ret;
25}
26
27int amdxdna_pm_resume(struct device *dev)
28{
29	struct amdxdna_dev *xdna = to_xdna_dev(dev_get_drvdata(dev));
30	int ret = -EOPNOTSUPP;
31
32	guard(mutex)(&xdna->dev_lock);
33	if (xdna->dev_info->ops->resume)
34		ret = xdna->dev_info->ops->resume(xdna);
35
36	XDNA_DBG(xdna, "Resume done ret %d", ret);
37	return ret;
38}
39
40int amdxdna_pm_resume_get(struct amdxdna_dev *xdna)
41{
42	struct device *dev = xdna->ddev.dev;
43	int ret;
44
45	ret = pm_runtime_resume_and_get(dev);
46	if (ret) {
47		XDNA_ERR(xdna, "Resume failed: %d", ret);
48		pm_runtime_set_suspended(dev);
49	}
50
51	return ret;
52}
53
54void amdxdna_pm_suspend_put(struct amdxdna_dev *xdna)
55{
56	struct device *dev = xdna->ddev.dev;
57
58	pm_runtime_put_autosuspend(dev);
59}
60
61void amdxdna_pm_init(struct amdxdna_dev *xdna)
62{
63	struct device *dev = xdna->ddev.dev;
64
65	pm_runtime_set_active(dev);
66	pm_runtime_set_autosuspend_delay(dev, AMDXDNA_AUTOSUSPEND_DELAY);
67	pm_runtime_use_autosuspend(dev);
68	pm_runtime_allow(dev);
69	pm_runtime_put_autosuspend(dev);
70}
71
72void amdxdna_pm_fini(struct amdxdna_dev *xdna)
73{
74	struct device *dev = xdna->ddev.dev;
75
76	pm_runtime_get_noresume(dev);
77	pm_runtime_forbid(dev);
78}