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) 2018 Intel Corporation. All rights reserved.
7 //
8 // Authors: Keyon Jie <yang.jie@linux.intel.com>
9
10 #include <linux/io.h>
11 #include <sound/hdaudio.h>
12 #include <sound/hda_i915.h>
13 #include <sound/hda_codec.h>
14 #include <sound/hda_register.h>
15 #include "../sof-priv.h"
16 #include "hda.h"
17
18 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
19 #include "../../codecs/hdac_hda.h"
20 #define sof_hda_ext_ops snd_soc_hdac_hda_get_ops()
21
update_codec_wake_enable(struct hdac_bus * bus,unsigned int addr,bool link_power)22 static void update_codec_wake_enable(struct hdac_bus *bus, unsigned int addr, bool link_power)
23 {
24 unsigned int mask = snd_hdac_chip_readw(bus, WAKEEN);
25
26 if (link_power)
27 mask &= ~BIT(addr);
28 else
29 mask |= BIT(addr);
30
31 snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);
32 }
33
sof_hda_bus_link_power(struct hdac_device * codec,bool enable)34 static void sof_hda_bus_link_power(struct hdac_device *codec, bool enable)
35 {
36 struct hdac_bus *bus = codec->bus;
37 bool oldstate = test_bit(codec->addr, &bus->codec_powered);
38
39 snd_hdac_ext_bus_link_power(codec, enable);
40
41 if (enable == oldstate)
42 return;
43
44 /*
45 * Both codec driver and controller can hold references to
46 * display power. To avoid unnecessary power-up/down cycles,
47 * controller doesn't immediately release its reference.
48 *
49 * If the codec driver powers down the link, release
50 * the controller reference as well.
51 */
52 if (codec->addr == HDA_IDISP_ADDR && !enable)
53 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
54
55 /* WAKEEN needs to be set for disabled links */
56 update_codec_wake_enable(bus, codec->addr, enable);
57 }
58
59 static const struct hdac_bus_ops bus_core_ops = {
60 .command = snd_hdac_bus_send_cmd,
61 .get_response = snd_hdac_bus_get_response,
62 .link_power = sof_hda_bus_link_power,
63 };
64 #endif
65
66 /*
67 * This can be used for both with/without hda link support.
68 */
sof_hda_bus_init(struct snd_sof_dev * sdev,struct device * dev)69 void sof_hda_bus_init(struct snd_sof_dev *sdev, struct device *dev)
70 {
71 struct hdac_bus *bus = sof_to_bus(sdev);
72
73 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_LINK)
74 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
75 snd_hdac_ext_bus_init(bus, dev, &bus_core_ops, sof_hda_ext_ops);
76 #else
77 snd_hdac_ext_bus_init(bus, dev, NULL, NULL);
78 #endif
79 #else
80
81 memset(bus, 0, sizeof(*bus));
82 bus->dev = dev;
83
84 INIT_LIST_HEAD(&bus->stream_list);
85
86 bus->irq = -1;
87
88 /*
89 * There is only one HDA bus atm. keep the index as 0.
90 * Need to fix when there are more than one HDA bus.
91 */
92 bus->idx = 0;
93
94 spin_lock_init(&bus->reg_lock);
95 #endif /* CONFIG_SND_SOC_SOF_HDA_LINK */
96 }
97
sof_hda_bus_exit(struct snd_sof_dev * sdev)98 void sof_hda_bus_exit(struct snd_sof_dev *sdev)
99 {
100 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_LINK)
101 struct hdac_bus *bus = sof_to_bus(sdev);
102
103 snd_hdac_ext_bus_exit(bus);
104 #endif
105 }
106