tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
11#include <linux/module.h>
12#include <sound/hdaudio_ext.h>
13#include <sound/hda_register.h>
14#include <sound/hda_codec.h>
15#include <sound/hda_i915.h>
16#include <sound/sof.h>
17#include "../ops.h"
18#include "hda.h"
19#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
20#include "../../codecs/hdac_hda.h"
21#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
22
23#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
24#define IDISP_VID_INTEL 0x80860000
25#define CODEC_PROBE_RETRIES 3
26
27/* load the legacy HDA codec driver */
28static int request_codec_module(struct hda_codec *codec)
29{
30#ifdef MODULE
31 char alias[MODULE_NAME_LEN];
32 const char *mod = NULL;
33
34 switch (codec->probe_id) {
35 case HDA_CODEC_ID_GENERIC:
36#if IS_MODULE(CONFIG_SND_HDA_GENERIC)
37 mod = "snd-hda-codec-generic";
38#endif
39 break;
40 default:
41 snd_hdac_codec_modalias(&codec->core, alias, sizeof(alias));
42 mod = alias;
43 break;
44 }
45
46 if (mod) {
47 dev_dbg(&codec->core.dev, "loading codec module: %s\n", mod);
48 request_module(mod);
49 }
50#endif /* MODULE */
51 return device_attach(hda_codec_dev(codec));
52}
53
54static int hda_codec_load_module(struct hda_codec *codec)
55{
56 int ret = request_codec_module(codec);
57
58 if (ret <= 0) {
59 codec->probe_id = HDA_CODEC_ID_GENERIC;
60 ret = request_codec_module(codec);
61 }
62
63 return ret;
64}
65
66/* enable controller wake up event for all codecs with jack connectors */
67void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev, bool enable)
68{
69 struct hda_bus *hbus = sof_to_hbus(sdev);
70 struct hdac_bus *bus = sof_to_bus(sdev);
71 struct hda_codec *codec;
72 unsigned int mask = 0;
73
74 if (enable) {
75 list_for_each_codec(codec, hbus)
76 if (codec->jacktbl.used)
77 mask |= BIT(codec->core.addr);
78 }
79
80 snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);
81}
82
83/* check jack status after resuming from suspend mode */
84void hda_codec_jack_check(struct snd_sof_dev *sdev)
85{
86 struct hda_bus *hbus = sof_to_hbus(sdev);
87 struct hda_codec *codec;
88
89 list_for_each_codec(codec, hbus)
90 /*
91 * Wake up all jack-detecting codecs regardless whether an event
92 * has been recorded in STATESTS
93 */
94 if (codec->jacktbl.used)
95 pm_request_resume(&codec->core.dev);
96}
97#else
98void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev, bool enable) {}
99void hda_codec_jack_check(struct snd_sof_dev *sdev) {}
100#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
101EXPORT_SYMBOL_NS(hda_codec_jack_wake_enable, SND_SOC_SOF_HDA_AUDIO_CODEC);
102EXPORT_SYMBOL_NS(hda_codec_jack_check, SND_SOC_SOF_HDA_AUDIO_CODEC);
103
104#if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
105#define is_generic_config(bus) \
106 ((bus)->modelname && !strcmp((bus)->modelname, "generic"))
107#else
108#define is_generic_config(x) 0
109#endif
110
111/* probe individual codec */
112static int hda_codec_probe(struct snd_sof_dev *sdev, int address,
113 bool hda_codec_use_common_hdmi)
114{
115#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
116 struct hdac_hda_priv *hda_priv;
117 struct hda_codec *codec;
118 int type = HDA_DEV_LEGACY;
119#endif
120 struct hda_bus *hbus = sof_to_hbus(sdev);
121 struct hdac_device *hdev;
122 u32 hda_cmd = (address << 28) | (AC_NODE_ROOT << 20) |
123 (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
124 u32 resp = -1;
125 int ret, retry = 0;
126
127 do {
128 mutex_lock(&hbus->core.cmd_mutex);
129 snd_hdac_bus_send_cmd(&hbus->core, hda_cmd);
130 snd_hdac_bus_get_response(&hbus->core, address, &resp);
131 mutex_unlock(&hbus->core.cmd_mutex);
132 } while (resp == -1 && retry++ < CODEC_PROBE_RETRIES);
133
134 if (resp == -1)
135 return -EIO;
136 dev_dbg(sdev->dev, "HDA codec #%d probed OK: response: %x\n",
137 address, resp);
138
139#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
140 hda_priv = devm_kzalloc(sdev->dev, sizeof(*hda_priv), GFP_KERNEL);
141 if (!hda_priv)
142 return -ENOMEM;
143
144 hda_priv->codec.bus = hbus;
145 hdev = &hda_priv->codec.core;
146 codec = &hda_priv->codec;
147
148 /* only probe ASoC codec drivers for HDAC-HDMI */
149 if (!hda_codec_use_common_hdmi && (resp & 0xFFFF0000) == IDISP_VID_INTEL)
150 type = HDA_DEV_ASOC;
151
152 ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev, type);
153 if (ret < 0)
154 return ret;
155
156 if ((resp & 0xFFFF0000) == IDISP_VID_INTEL) {
157 if (!hdev->bus->audio_component) {
158 dev_dbg(sdev->dev,
159 "iDisp hw present but no driver\n");
160 ret = -ENOENT;
161 goto out;
162 }
163 hda_priv->need_display_power = true;
164 }
165
166 if (is_generic_config(hbus))
167 codec->probe_id = HDA_CODEC_ID_GENERIC;
168 else
169 codec->probe_id = 0;
170
171 if (type == HDA_DEV_LEGACY) {
172 ret = hda_codec_load_module(codec);
173 /*
174 * handle ret==0 (no driver bound) as an error, but pass
175 * other return codes without modification
176 */
177 if (ret == 0)
178 ret = -ENOENT;
179 }
180
181out:
182 if (ret < 0) {
183 snd_hdac_device_unregister(hdev);
184 put_device(&hdev->dev);
185 }
186#else
187 hdev = devm_kzalloc(sdev->dev, sizeof(*hdev), GFP_KERNEL);
188 if (!hdev)
189 return -ENOMEM;
190
191 ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev, HDA_DEV_ASOC);
192#endif
193
194 return ret;
195}
196
197/* Codec initialization */
198void hda_codec_probe_bus(struct snd_sof_dev *sdev,
199 bool hda_codec_use_common_hdmi)
200{
201 struct hdac_bus *bus = sof_to_bus(sdev);
202 int i, ret;
203
204 /* probe codecs in avail slots */
205 for (i = 0; i < HDA_MAX_CODECS; i++) {
206
207 if (!(bus->codec_mask & (1 << i)))
208 continue;
209
210 ret = hda_codec_probe(sdev, i, hda_codec_use_common_hdmi);
211 if (ret < 0) {
212 dev_warn(bus->dev, "codec #%d probe error, ret: %d\n",
213 i, ret);
214 bus->codec_mask &= ~BIT(i);
215 }
216 }
217}
218EXPORT_SYMBOL_NS(hda_codec_probe_bus, SND_SOC_SOF_HDA_AUDIO_CODEC);
219
220#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI) || \
221 IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)
222
223void hda_codec_i915_display_power(struct snd_sof_dev *sdev, bool enable)
224{
225 struct hdac_bus *bus = sof_to_bus(sdev);
226
227 if (HDA_IDISP_CODEC(bus->codec_mask)) {
228 dev_dbg(bus->dev, "Turning i915 HDAC power %d\n", enable);
229 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, enable);
230 }
231}
232EXPORT_SYMBOL_NS(hda_codec_i915_display_power, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
233
234int hda_codec_i915_init(struct snd_sof_dev *sdev)
235{
236 struct hdac_bus *bus = sof_to_bus(sdev);
237 int ret;
238
239 /* i915 exposes a HDA codec for HDMI audio */
240 ret = snd_hdac_i915_init(bus);
241 if (ret < 0)
242 return ret;
243
244 /* codec_mask not yet known, power up for probe */
245 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
246
247 return 0;
248}
249EXPORT_SYMBOL_NS(hda_codec_i915_init, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
250
251int hda_codec_i915_exit(struct snd_sof_dev *sdev)
252{
253 struct hdac_bus *bus = sof_to_bus(sdev);
254
255 if (!bus->audio_component)
256 return 0;
257
258 /* power down unconditionally */
259 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
260
261 return snd_hdac_i915_exit(bus);
262}
263EXPORT_SYMBOL_NS(hda_codec_i915_exit, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
264
265#endif
266
267MODULE_LICENSE("Dual BSD/GPL");