diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/qcom/common.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/sound/soc/qcom/common.c b/sound/soc/qcom/common.c new file mode 100644 index 000000000..09af00700 --- /dev/null +++ b/sound/soc/qcom/common.c @@ -0,0 +1,172 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018, Linaro Limited. +// Copyright (c) 2018, The Linux Foundation. All rights reserved. + +#include <linux/module.h> +#include "common.h" + +int qcom_snd_parse_of(struct snd_soc_card *card) +{ + struct device_node *np; + struct device_node *codec = NULL; + struct device_node *platform = NULL; + struct device_node *cpu = NULL; + struct device *dev = card->dev; + struct snd_soc_dai_link *link; + struct of_phandle_args args; + struct snd_soc_dai_link_component *dlc; + int ret, num_links; + + ret = snd_soc_of_parse_card_name(card, "model"); + if (ret == 0 && !card->name) + /* Deprecated, only for compatibility with old device trees */ + ret = snd_soc_of_parse_card_name(card, "qcom,model"); + if (ret) { + dev_err(dev, "Error parsing card name: %d\n", ret); + return ret; + } + + /* DAPM routes */ + if (of_property_read_bool(dev->of_node, "audio-routing")) { + ret = snd_soc_of_parse_audio_routing(card, "audio-routing"); + if (ret) + return ret; + } + /* Deprecated, only for compatibility with old device trees */ + if (of_property_read_bool(dev->of_node, "qcom,audio-routing")) { + ret = snd_soc_of_parse_audio_routing(card, "qcom,audio-routing"); + if (ret) + return ret; + } + + ret = snd_soc_of_parse_aux_devs(card, "aux-devs"); + if (ret) + return ret; + + /* Populate links */ + num_links = of_get_child_count(dev->of_node); + + /* Allocate the DAI link array */ + card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL); + if (!card->dai_link) + return -ENOMEM; + + card->num_links = num_links; + link = card->dai_link; + + for_each_child_of_node(dev->of_node, np) { + dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); + if (!dlc) { + ret = -ENOMEM; + goto err_put_np; + } + + link->cpus = &dlc[0]; + link->platforms = &dlc[1]; + + link->num_cpus = 1; + link->num_platforms = 1; + + ret = of_property_read_string(np, "link-name", &link->name); + if (ret) { + dev_err(card->dev, "error getting codec dai_link name\n"); + goto err_put_np; + } + + cpu = of_get_child_by_name(np, "cpu"); + platform = of_get_child_by_name(np, "platform"); + codec = of_get_child_by_name(np, "codec"); + + if (!cpu) { + dev_err(dev, "%s: Can't find cpu DT node\n", link->name); + ret = -EINVAL; + goto err; + } + + ret = of_parse_phandle_with_args(cpu, "sound-dai", + "#sound-dai-cells", 0, &args); + if (ret) { + dev_err(card->dev, "%s: error getting cpu phandle\n", link->name); + goto err; + } + link->cpus->of_node = args.np; + link->id = args.args[0]; + + ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name); + if (ret) { + if (ret != -EPROBE_DEFER) + dev_err(card->dev, "%s: error getting cpu dai name: %d\n", + link->name, ret); + goto err; + } + + if (platform) { + link->platforms->of_node = of_parse_phandle(platform, + "sound-dai", + 0); + if (!link->platforms->of_node) { + dev_err(card->dev, "%s: platform dai not found\n", link->name); + ret = -EINVAL; + goto err; + } + } else { + link->platforms->of_node = link->cpus->of_node; + } + + if (codec) { + ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); + if (ret < 0) { + if (ret != -EPROBE_DEFER) + dev_err(card->dev, "%s: codec dai not found: %d\n", + link->name, ret); + goto err; + } + + if (platform) { + /* DPCM backend */ + link->no_pcm = 1; + link->ignore_pmdown_time = 1; + } + } else { + /* DPCM frontend */ + dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); + if (!dlc) { + ret = -ENOMEM; + goto err; + } + + link->codecs = dlc; + link->num_codecs = 1; + + link->codecs->dai_name = "snd-soc-dummy-dai"; + link->codecs->name = "snd-soc-dummy"; + link->dynamic = 1; + } + + if (platform || !codec) { + /* DPCM */ + snd_soc_dai_link_set_capabilities(link); + link->ignore_suspend = 1; + link->nonatomic = 1; + } + + link->stream_name = link->name; + link++; + + of_node_put(cpu); + of_node_put(codec); + of_node_put(platform); + } + + return 0; +err: + of_node_put(cpu); + of_node_put(codec); + of_node_put(platform); +err_put_np: + of_node_put(np); + return ret; +} +EXPORT_SYMBOL(qcom_snd_parse_of); + +MODULE_LICENSE("GPL v2"); |