1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
 2//
 3// This file is provided under a dual BSD/GPLv2 license.  When using or
 4// redistributing this file, you may do so under either license.
 5//
 6// Copyright(c) 2022 Intel Corporation. All rights reserved.
 7//
 8
 9/*
10 * Management of HDaudio multi-link (capabilities, power, coupling)
11 */
12
13#include <sound/hdaudio_ext.h>
14#include <sound/hda_register.h>
15
16#include <linux/acpi.h>
17#include <linux/module.h>
18#include <linux/soundwire/sdw.h>
19#include <linux/soundwire/sdw_intel.h>
20#include <sound/intel-dsp-config.h>
21#include <sound/intel-nhlt.h>
22#include <sound/sof.h>
23#include <sound/sof/xtensa.h>
24#include "../sof-audio.h"
25#include "../sof-pci-dev.h"
26#include "../ops.h"
27#include "hda.h"
28
29#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
30
31void hda_bus_ml_get_capabilities(struct hdac_bus *bus)
32{
33	if (bus->mlcap)
34		snd_hdac_ext_bus_get_ml_capabilities(bus);
35}
36
37void hda_bus_ml_free(struct hdac_bus *bus)
38{
39	struct hdac_ext_link *hlink;
40
41	if (!bus->mlcap)
42		return;
43
44	while (!list_empty(&bus->hlink_list)) {
45		hlink = list_first_entry(&bus->hlink_list, struct hdac_ext_link, list);
46		list_del(&hlink->list);
47		kfree(hlink);
48	}
49}
50
51void hda_bus_ml_put_all(struct hdac_bus *bus)
52{
53	struct hdac_ext_link *hlink;
54
55	list_for_each_entry(hlink, &bus->hlink_list, list)
56		snd_hdac_ext_bus_link_put(bus, hlink);
57}
58
59void hda_bus_ml_reset_losidv(struct hdac_bus *bus)
60{
61	struct hdac_ext_link *hlink;
62
63	/* Reset stream-to-link mapping */
64	list_for_each_entry(hlink, &bus->hlink_list, list)
65		writel(0, hlink->ml_addr + AZX_REG_ML_LOSIDV);
66}
67
68int hda_bus_ml_resume(struct hdac_bus *bus)
69{
70	struct hdac_ext_link *hlink;
71	int ret;
72
73	/* power up links that were active before suspend */
74	list_for_each_entry(hlink, &bus->hlink_list, list) {
75		if (hlink->ref_count) {
76			ret = snd_hdac_ext_bus_link_power_up(hlink);
77			if (ret < 0)
78				return ret;
79		}
80	}
81	return 0;
82}
83
84int hda_bus_ml_suspend(struct hdac_bus *bus)
85{
86	return snd_hdac_ext_bus_link_power_down_all(bus);
87}
88
89#endif