Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: (GPL-2.0 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
11#include <linux/module.h>
12#include <sound/hdaudio_ext.h>
13#include <sound/hda_codec.h>
14#include <sound/hda_i915.h>
15#include <sound/sof.h>
16#include "../ops.h"
17#include "hda.h"
18#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
19#include "../../codecs/hdac_hda.h"
20#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
21
22#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
23#define IDISP_VID_INTEL 0x80860000
24
25/* load the legacy HDA codec driver */
26#ifdef MODULE
27static void hda_codec_load_module(struct hda_codec *codec)
28{
29 char alias[MODULE_NAME_LEN];
30 const char *module = alias;
31
32 snd_hdac_codec_modalias(&codec->core, alias, sizeof(alias));
33 dev_dbg(&codec->core.dev, "loading codec module: %s\n", module);
34 request_module(module);
35}
36#else
37static void hda_codec_load_module(struct hda_codec *codec) {}
38#endif
39
40#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
41
42/* probe individual codec */
43static int hda_codec_probe(struct snd_sof_dev *sdev, int address)
44{
45 struct hda_bus *hbus = sof_to_hbus(sdev);
46 struct hdac_device *hdev;
47#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
48 struct hdac_hda_priv *hda_priv;
49#endif
50 u32 hda_cmd = (address << 28) | (AC_NODE_ROOT << 20) |
51 (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
52 u32 resp = -1;
53 int ret;
54
55 mutex_lock(&hbus->core.cmd_mutex);
56 snd_hdac_bus_send_cmd(&hbus->core, hda_cmd);
57 snd_hdac_bus_get_response(&hbus->core, address, &resp);
58 mutex_unlock(&hbus->core.cmd_mutex);
59 if (resp == -1)
60 return -EIO;
61 dev_dbg(sdev->dev, "HDA codec #%d probed OK: response: %x\n",
62 address, resp);
63
64#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
65 /* snd_hdac_ext_bus_device_exit will use kfree to free hdev */
66 hda_priv = kzalloc(sizeof(*hda_priv), GFP_KERNEL);
67 if (!hda_priv)
68 return -ENOMEM;
69
70 hda_priv->codec.bus = hbus;
71 hdev = &hda_priv->codec.core;
72
73 ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev);
74 if (ret < 0)
75 return ret;
76
77 /* use legacy bus only for HDA codecs, idisp uses ext bus */
78 if ((resp & 0xFFFF0000) != IDISP_VID_INTEL) {
79 hdev->type = HDA_DEV_LEGACY;
80 hda_codec_load_module(&hda_priv->codec);
81 }
82
83 return 0;
84#else
85 /* snd_hdac_ext_bus_device_exit will use kfree to free hdev */
86 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
87 if (!hdev)
88 return -ENOMEM;
89
90 ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev);
91
92 return ret;
93#endif
94}
95
96/* Codec initialization */
97int hda_codec_probe_bus(struct snd_sof_dev *sdev)
98{
99 struct hdac_bus *bus = sof_to_bus(sdev);
100 int i, ret;
101
102 /* probe codecs in avail slots */
103 for (i = 0; i < HDA_MAX_CODECS; i++) {
104
105 if (!(bus->codec_mask & (1 << i)))
106 continue;
107
108 ret = hda_codec_probe(sdev, i);
109 if (ret < 0) {
110 dev_err(bus->dev, "error: codec #%d probe error, ret: %d\n",
111 i, ret);
112 return ret;
113 }
114 }
115
116 return 0;
117}
118EXPORT_SYMBOL(hda_codec_probe_bus);
119
120#if IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)
121
122void hda_codec_i915_get(struct snd_sof_dev *sdev)
123{
124 struct hdac_bus *bus = sof_to_bus(sdev);
125
126 dev_dbg(bus->dev, "Turning i915 HDAC power on\n");
127 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
128}
129EXPORT_SYMBOL(hda_codec_i915_get);
130
131void hda_codec_i915_put(struct snd_sof_dev *sdev)
132{
133 struct hdac_bus *bus = sof_to_bus(sdev);
134
135 dev_dbg(bus->dev, "Turning i915 HDAC power off\n");
136 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
137}
138EXPORT_SYMBOL(hda_codec_i915_put);
139
140int hda_codec_i915_init(struct snd_sof_dev *sdev)
141{
142 struct hdac_bus *bus = sof_to_bus(sdev);
143 int ret;
144
145 /* i915 exposes a HDA codec for HDMI audio */
146 ret = snd_hdac_i915_init(bus);
147 if (ret < 0)
148 return ret;
149
150 hda_codec_i915_get(sdev);
151
152 return 0;
153}
154EXPORT_SYMBOL(hda_codec_i915_init);
155
156int hda_codec_i915_exit(struct snd_sof_dev *sdev)
157{
158 struct hdac_bus *bus = sof_to_bus(sdev);
159 int ret;
160
161 hda_codec_i915_put(sdev);
162
163 ret = snd_hdac_i915_exit(bus);
164
165 return ret;
166}
167EXPORT_SYMBOL(hda_codec_i915_exit);
168
169#endif /* CONFIG_SND_SOC_HDAC_HDMI */
170
171MODULE_LICENSE("Dual BSD/GPL");