1// SPDX-License-Identifier: GPL-2.0-only
2// Copyright (c) 2025 Texas Instruments Inc.
3
4/*
5 * soc_sdw_ti_amp - Helpers to handle TI's soundwire based codecs
6 */
7
8#include <linux/device.h>
9#include <linux/errno.h>
10#include <sound/soc.h>
11#include <sound/soc-acpi.h>
12#include <sound/soc-dai.h>
13#include <sound/soc_sdw_utils.h>
14
15#define TIAMP_SPK_VOLUME_0DB 200
16
17int asoc_sdw_ti_amp_initial_settings(struct snd_soc_card *card,
18 const char *name_prefix)
19{
20 char *volume_ctl_name;
21 int ret;
22
23 volume_ctl_name = kasprintf(GFP_KERNEL, fmt: "%s Speaker Volume",
24 name_prefix);
25 if (!volume_ctl_name)
26 return -ENOMEM;
27
28 ret = snd_soc_limit_volume(card, name: volume_ctl_name,
29 TIAMP_SPK_VOLUME_0DB);
30 if (ret)
31 dev_err(card->dev,
32 "%s update failed %d\n",
33 volume_ctl_name, ret);
34
35 kfree(objp: volume_ctl_name);
36 return 0;
37}
38EXPORT_SYMBOL_NS(asoc_sdw_ti_amp_initial_settings, "SND_SOC_SDW_UTILS");
39
40int asoc_sdw_ti_spk_rtd_init(struct snd_soc_pcm_runtime *rtd,
41 struct snd_soc_dai *dai)
42{
43 struct snd_soc_card *card = rtd->card;
44 struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
45 char widget_name[16];
46 char speaker[16];
47 struct snd_soc_dapm_route route = {speaker, NULL, widget_name};
48 struct snd_soc_dai *codec_dai;
49 const char *prefix;
50 int i, ret = 0;
51
52 for_each_rtd_codec_dais(rtd, i, codec_dai) {
53 if (!strstr(codec_dai->name, "tas2783"))
54 continue;
55
56 prefix = codec_dai->component->name_prefix;
57 if (!strncmp(prefix, "tas2783-1", strlen("tas2783-1"))) {
58 strscpy(speaker, "Left Spk", sizeof(speaker));
59 } else if (!strncmp(prefix, "tas2783-2", strlen("tas2783-2"))) {
60 strscpy(speaker, "Right Spk", sizeof(speaker));
61 } else {
62 ret = -EINVAL;
63 dev_err(card->dev, "unhandled prefix %s", prefix);
64 break;
65 }
66
67 snprintf(buf: widget_name, size: sizeof(widget_name), fmt: "%s SPK", prefix);
68 ret = asoc_sdw_ti_amp_initial_settings(card, prefix);
69 if (ret)
70 return ret;
71
72 ret = snd_soc_dapm_add_routes(dapm, route: &route, num: 1);
73 if (ret)
74 return ret;
75 }
76
77 return ret;
78}
79EXPORT_SYMBOL_NS(asoc_sdw_ti_spk_rtd_init, "SND_SOC_SDW_UTILS");
80
81int asoc_sdw_ti_amp_init(struct snd_soc_card *card,
82 struct snd_soc_dai_link *dai_links,
83 struct asoc_sdw_codec_info *info,
84 bool playback)
85{
86 if (!playback)
87 return 0;
88
89 info->amp_num++;
90
91 return 0;
92}
93EXPORT_SYMBOL_NS(asoc_sdw_ti_amp_init, "SND_SOC_SDW_UTILS");
94

source code of linux/sound/soc/sdw_utils/soc_sdw_ti_amp.c