750 lines
19 KiB
C
750 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// ASoC audio graph sound card support
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//
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// Copyright (C) 2016 Renesas Solutions Corp.
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// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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//
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// based on ${LINUX}/sound/soc/generic/simple-card.c
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/of_graph.h>
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#include <linux/platform_device.h>
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#include <linux/string.h>
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#include <sound/graph_card.h>
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#define DPCM_SELECTABLE 1
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static int graph_outdrv_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol,
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int event)
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{
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struct snd_soc_dapm_context *dapm = w->dapm;
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struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(dapm->card);
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switch (event) {
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case SND_SOC_DAPM_POST_PMU:
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gpiod_set_value_cansleep(priv->pa_gpio, 1);
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break;
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case SND_SOC_DAPM_PRE_PMD:
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gpiod_set_value_cansleep(priv->pa_gpio, 0);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static const struct snd_soc_dapm_widget graph_dapm_widgets[] = {
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SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
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0, 0, NULL, 0, graph_outdrv_event,
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SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
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};
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static const struct snd_soc_ops graph_ops = {
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.startup = asoc_simple_startup,
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.shutdown = asoc_simple_shutdown,
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.hw_params = asoc_simple_hw_params,
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};
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static int graph_get_dai_id(struct device_node *ep)
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{
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struct device_node *node;
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struct device_node *endpoint;
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struct of_endpoint info;
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int i, id;
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const u32 *reg;
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int ret;
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/* use driver specified DAI ID if exist */
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ret = snd_soc_get_dai_id(ep);
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if (ret != -ENOTSUPP)
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return ret;
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/* use endpoint/port reg if exist */
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ret = of_graph_parse_endpoint(ep, &info);
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if (ret == 0) {
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/*
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* Because it will count port/endpoint if it doesn't have "reg".
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* But, we can't judge whether it has "no reg", or "reg = <0>"
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* only of_graph_parse_endpoint().
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* We need to check "reg" property
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*/
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if (of_get_property(ep, "reg", NULL))
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return info.id;
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node = of_get_parent(ep);
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reg = of_get_property(node, "reg", NULL);
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of_node_put(node);
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if (reg)
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return info.port;
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}
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node = of_graph_get_port_parent(ep);
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/*
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* Non HDMI sound case, counting port/endpoint on its DT
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* is enough. Let's count it.
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*/
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i = 0;
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id = -1;
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for_each_endpoint_of_node(node, endpoint) {
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if (endpoint == ep)
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id = i;
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i++;
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}
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of_node_put(node);
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if (id < 0)
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return -ENODEV;
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return id;
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}
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static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc)
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{
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struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc);
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if (dai && (dai->component->driver->pcm_construct ||
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dai->driver->pcm_new))
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return true;
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return false;
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}
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static int asoc_simple_parse_dai(struct device_node *ep,
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struct snd_soc_dai_link_component *dlc,
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int *is_single_link)
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{
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struct device_node *node;
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struct of_phandle_args args;
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int ret;
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if (!ep)
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return 0;
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node = of_graph_get_port_parent(ep);
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/* Get dai->name */
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args.np = node;
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args.args[0] = graph_get_dai_id(ep);
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args.args_count = (of_graph_get_endpoint_count(node) > 1);
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/*
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* FIXME
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*
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* Here, dlc->dai_name is pointer to CPU/Codec DAI name.
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* If user unbinded CPU or Codec driver, but not for Sound Card,
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* dlc->dai_name is keeping unbinded CPU or Codec
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* driver's pointer.
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*
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* If user re-bind CPU or Codec driver again, ALSA SoC will try
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* to rebind Card via snd_soc_try_rebind_card(), but because of
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* above reason, it might can't bind Sound Card.
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* Because Sound Card is pointing to released dai_name pointer.
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*
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* To avoid this rebind Card issue,
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* 1) It needs to alloc memory to keep dai_name eventhough
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* CPU or Codec driver was unbinded, or
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* 2) user need to rebind Sound Card everytime
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* if he unbinded CPU or Codec.
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*/
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ret = snd_soc_get_dai_name(&args, &dlc->dai_name);
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if (ret < 0)
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return ret;
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dlc->of_node = node;
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if (is_single_link)
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*is_single_link = of_graph_get_endpoint_count(node) == 1;
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return 0;
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}
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static void graph_parse_convert(struct device *dev,
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struct device_node *ep,
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struct asoc_simple_data *adata)
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{
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struct device_node *top = dev->of_node;
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struct device_node *port = of_get_parent(ep);
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struct device_node *ports = of_get_parent(port);
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struct device_node *node = of_graph_get_port_parent(ep);
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asoc_simple_parse_convert(top, NULL, adata);
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if (of_node_name_eq(ports, "ports"))
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asoc_simple_parse_convert(ports, NULL, adata);
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asoc_simple_parse_convert(port, NULL, adata);
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asoc_simple_parse_convert(ep, NULL, adata);
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of_node_put(port);
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of_node_put(ports);
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of_node_put(node);
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}
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static void graph_parse_mclk_fs(struct device_node *top,
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struct device_node *ep,
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struct simple_dai_props *props)
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{
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struct device_node *port = of_get_parent(ep);
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struct device_node *ports = of_get_parent(port);
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of_property_read_u32(top, "mclk-fs", &props->mclk_fs);
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if (of_node_name_eq(ports, "ports"))
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of_property_read_u32(ports, "mclk-fs", &props->mclk_fs);
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of_property_read_u32(port, "mclk-fs", &props->mclk_fs);
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of_property_read_u32(ep, "mclk-fs", &props->mclk_fs);
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of_node_put(port);
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of_node_put(ports);
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}
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static int graph_parse_node(struct asoc_simple_priv *priv,
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struct device_node *ep,
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struct link_info *li,
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int *cpu)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct device_node *top = dev->of_node;
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struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
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struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
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struct snd_soc_dai_link_component *dlc;
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struct asoc_simple_dai *dai;
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int ret;
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if (cpu) {
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dlc = asoc_link_to_cpu(dai_link, 0);
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dai = simple_props_to_dai_cpu(dai_props, 0);
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} else {
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dlc = asoc_link_to_codec(dai_link, 0);
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dai = simple_props_to_dai_codec(dai_props, 0);
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}
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graph_parse_mclk_fs(top, ep, dai_props);
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ret = asoc_simple_parse_dai(ep, dlc, cpu);
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if (ret < 0)
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return ret;
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ret = asoc_simple_parse_tdm(ep, dai);
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if (ret < 0)
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return ret;
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ret = asoc_simple_parse_clk(dev, ep, dai, dlc);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int graph_link_init(struct asoc_simple_priv *priv,
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struct device_node *cpu_ep,
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struct device_node *codec_ep,
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struct link_info *li,
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char *name)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
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int ret;
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ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
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NULL, &dai_link->dai_fmt);
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if (ret < 0)
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return ret;
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dai_link->init = asoc_simple_dai_init;
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dai_link->ops = &graph_ops;
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if (priv->ops)
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dai_link->ops = priv->ops;
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return asoc_simple_set_dailink_name(dev, dai_link, name);
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}
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static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
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struct device_node *cpu_ep,
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struct device_node *codec_ep,
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struct link_info *li)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
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struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
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struct device_node *top = dev->of_node;
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struct device_node *ep = li->cpu ? cpu_ep : codec_ep;
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char dai_name[64];
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int ret;
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dev_dbg(dev, "link_of DPCM (%pOF)\n", ep);
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if (li->cpu) {
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struct snd_soc_card *card = simple_priv_to_card(priv);
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struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
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struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
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int is_single_links = 0;
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/* Codec is dummy */
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/* FE settings */
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dai_link->dynamic = 1;
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dai_link->dpcm_merged_format = 1;
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ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
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if (ret)
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return ret;
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snprintf(dai_name, sizeof(dai_name),
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"fe.%pOFP.%s", cpus->of_node, cpus->dai_name);
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/*
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* In BE<->BE connections it is not required to create
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* PCM devices at CPU end of the dai link and thus 'no_pcm'
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* flag needs to be set. It is useful when there are many
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* BE components and some of these have to be connected to
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* form a valid audio path.
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*
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* For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where
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* there are 'n' BE components in the path.
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*/
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if (card->component_chaining && !soc_component_is_pcm(cpus)) {
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dai_link->no_pcm = 1;
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dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
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}
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asoc_simple_canonicalize_cpu(cpus, is_single_links);
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asoc_simple_canonicalize_platform(platforms, cpus);
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} else {
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struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, 0);
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struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
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struct device_node *port;
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struct device_node *ports;
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/* CPU is dummy */
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/* BE settings */
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dai_link->no_pcm = 1;
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dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
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ret = graph_parse_node(priv, codec_ep, li, NULL);
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if (ret < 0)
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return ret;
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snprintf(dai_name, sizeof(dai_name),
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"be.%pOFP.%s", codecs->of_node, codecs->dai_name);
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/* check "prefix" from top node */
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port = of_get_parent(ep);
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ports = of_get_parent(port);
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snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
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"prefix");
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if (of_node_name_eq(ports, "ports"))
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snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix");
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snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node,
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"prefix");
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of_node_put(ports);
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of_node_put(port);
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}
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graph_parse_convert(dev, ep, &dai_props->adata);
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snd_soc_dai_link_set_capabilities(dai_link);
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ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
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li->link++;
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return ret;
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}
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static int graph_dai_link_of(struct asoc_simple_priv *priv,
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struct device_node *cpu_ep,
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struct device_node *codec_ep,
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struct link_info *li)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
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struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
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struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
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struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
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char dai_name[64];
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int ret, is_single_links = 0;
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dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
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ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
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if (ret < 0)
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return ret;
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ret = graph_parse_node(priv, codec_ep, li, NULL);
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if (ret < 0)
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return ret;
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snprintf(dai_name, sizeof(dai_name),
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"%s-%s", cpus->dai_name, codecs->dai_name);
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asoc_simple_canonicalize_cpu(cpus, is_single_links);
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asoc_simple_canonicalize_platform(platforms, cpus);
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ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
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if (ret < 0)
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return ret;
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li->link++;
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return 0;
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}
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static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv,
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struct device_node *codec_port,
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struct asoc_simple_data *adata)
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{
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if (priv->force_dpcm)
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return true;
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if (!priv->dpcm_selectable)
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return false;
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/*
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* It is DPCM
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* if Codec port has many endpoints,
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* or has convert-xxx property
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*/
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if ((of_get_child_count(codec_port) > 1) ||
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(adata->convert_rate || adata->convert_channels))
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return true;
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return false;
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}
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static int __graph_for_each_link(struct asoc_simple_priv *priv,
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struct link_info *li,
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int (*func_noml)(struct asoc_simple_priv *priv,
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struct device_node *cpu_ep,
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struct device_node *codec_ep,
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struct link_info *li),
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int (*func_dpcm)(struct asoc_simple_priv *priv,
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struct device_node *cpu_ep,
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struct device_node *codec_ep,
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struct link_info *li))
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{
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struct of_phandle_iterator it;
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struct device *dev = simple_priv_to_dev(priv);
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struct device_node *node = dev->of_node;
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struct device_node *cpu_port;
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struct device_node *cpu_ep;
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struct device_node *codec_ep;
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struct device_node *codec_port;
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struct device_node *codec_port_old = NULL;
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struct asoc_simple_data adata;
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int rc, ret = 0;
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/* loop for all listed CPU port */
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of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
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cpu_port = it.node;
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cpu_ep = NULL;
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/* loop for all CPU endpoint */
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while (1) {
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cpu_ep = of_get_next_child(cpu_port, cpu_ep);
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if (!cpu_ep)
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break;
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/* get codec */
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codec_ep = of_graph_get_remote_endpoint(cpu_ep);
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codec_port = of_get_parent(codec_ep);
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/* get convert-xxx property */
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memset(&adata, 0, sizeof(adata));
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graph_parse_convert(dev, codec_ep, &adata);
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graph_parse_convert(dev, cpu_ep, &adata);
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/* check if link requires DPCM parsing */
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if (parse_as_dpcm_link(priv, codec_port, &adata)) {
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/*
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* Codec endpoint can be NULL for pluggable audio HW.
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* Platform DT can populate the Codec endpoint depending on the
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* plugged HW.
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*/
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/* Do it all CPU endpoint, and 1st Codec endpoint */
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if (li->cpu ||
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((codec_port_old != codec_port) && codec_ep))
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ret = func_dpcm(priv, cpu_ep, codec_ep, li);
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/* else normal sound */
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} else {
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if (li->cpu)
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ret = func_noml(priv, cpu_ep, codec_ep, li);
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}
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of_node_put(codec_ep);
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of_node_put(codec_port);
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if (ret < 0)
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return ret;
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codec_port_old = codec_port;
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}
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}
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return 0;
|
|
}
|
|
|
|
static int graph_for_each_link(struct asoc_simple_priv *priv,
|
|
struct link_info *li,
|
|
int (*func_noml)(struct asoc_simple_priv *priv,
|
|
struct device_node *cpu_ep,
|
|
struct device_node *codec_ep,
|
|
struct link_info *li),
|
|
int (*func_dpcm)(struct asoc_simple_priv *priv,
|
|
struct device_node *cpu_ep,
|
|
struct device_node *codec_ep,
|
|
struct link_info *li))
|
|
{
|
|
int ret;
|
|
/*
|
|
* Detect all CPU first, and Detect all Codec 2nd.
|
|
*
|
|
* In Normal sound case, all DAIs are detected
|
|
* as "CPU-Codec".
|
|
*
|
|
* In DPCM sound case,
|
|
* all CPUs are detected as "CPU-dummy", and
|
|
* all Codecs are detected as "dummy-Codec".
|
|
* To avoid random sub-device numbering,
|
|
* detect "dummy-Codec" in last;
|
|
*/
|
|
for (li->cpu = 1; li->cpu >= 0; li->cpu--) {
|
|
ret = __graph_for_each_link(priv, li, func_noml, func_dpcm);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int graph_get_dais_count(struct asoc_simple_priv *priv,
|
|
struct link_info *li);
|
|
|
|
int audio_graph_parse_of(struct asoc_simple_priv *priv, struct device *dev)
|
|
{
|
|
struct snd_soc_card *card = simple_priv_to_card(priv);
|
|
struct link_info *li;
|
|
int ret;
|
|
|
|
li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL);
|
|
if (!li)
|
|
return -ENOMEM;
|
|
|
|
card->owner = THIS_MODULE;
|
|
card->dev = dev;
|
|
|
|
ret = graph_get_dais_count(priv, li);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (!li->link)
|
|
return -EINVAL;
|
|
|
|
ret = asoc_simple_init_priv(priv, li);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
|
|
if (IS_ERR(priv->pa_gpio)) {
|
|
ret = PTR_ERR(priv->pa_gpio);
|
|
dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = asoc_simple_parse_widgets(card, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = asoc_simple_parse_routing(card, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
memset(li, 0, sizeof(*li));
|
|
ret = graph_for_each_link(priv, li,
|
|
graph_dai_link_of,
|
|
graph_dai_link_of_dpcm);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = asoc_simple_parse_card_name(card, NULL);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
snd_soc_card_set_drvdata(card, priv);
|
|
|
|
asoc_simple_debug_info(priv);
|
|
|
|
ret = devm_snd_soc_register_card(dev, card);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
devm_kfree(dev, li);
|
|
return 0;
|
|
|
|
err:
|
|
asoc_simple_clean_reference(card);
|
|
|
|
return dev_err_probe(dev, ret, "parse error\n");
|
|
}
|
|
EXPORT_SYMBOL_GPL(audio_graph_parse_of);
|
|
|
|
static int graph_count_noml(struct asoc_simple_priv *priv,
|
|
struct device_node *cpu_ep,
|
|
struct device_node *codec_ep,
|
|
struct link_info *li)
|
|
{
|
|
struct device *dev = simple_priv_to_dev(priv);
|
|
|
|
if (li->link >= SNDRV_MAX_LINKS) {
|
|
dev_err(dev, "too many links\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
li->num[li->link].cpus = 1;
|
|
li->num[li->link].codecs = 1;
|
|
li->num[li->link].platforms = 1;
|
|
|
|
li->link += 1; /* 1xCPU-Codec */
|
|
|
|
dev_dbg(dev, "Count As Normal\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int graph_count_dpcm(struct asoc_simple_priv *priv,
|
|
struct device_node *cpu_ep,
|
|
struct device_node *codec_ep,
|
|
struct link_info *li)
|
|
{
|
|
struct device *dev = simple_priv_to_dev(priv);
|
|
|
|
if (li->link >= SNDRV_MAX_LINKS) {
|
|
dev_err(dev, "too many links\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (li->cpu) {
|
|
li->num[li->link].cpus = 1;
|
|
li->num[li->link].platforms = 1;
|
|
|
|
li->link++; /* 1xCPU-dummy */
|
|
} else {
|
|
li->num[li->link].codecs = 1;
|
|
|
|
li->link++; /* 1xdummy-Codec */
|
|
}
|
|
|
|
dev_dbg(dev, "Count As DPCM\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int graph_get_dais_count(struct asoc_simple_priv *priv,
|
|
struct link_info *li)
|
|
{
|
|
/*
|
|
* link_num : number of links.
|
|
* CPU-Codec / CPU-dummy / dummy-Codec
|
|
* dais_num : number of DAIs
|
|
* ccnf_num : number of codec_conf
|
|
* same number for "dummy-Codec"
|
|
*
|
|
* ex1)
|
|
* CPU0 --- Codec0 link : 5
|
|
* CPU1 --- Codec1 dais : 7
|
|
* CPU2 -/ ccnf : 1
|
|
* CPU3 --- Codec2
|
|
*
|
|
* => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
|
|
* => 7 DAIs = 4xCPU + 3xCodec
|
|
* => 1 ccnf = 1xdummy-Codec
|
|
*
|
|
* ex2)
|
|
* CPU0 --- Codec0 link : 5
|
|
* CPU1 --- Codec1 dais : 6
|
|
* CPU2 -/ ccnf : 1
|
|
* CPU3 -/
|
|
*
|
|
* => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
|
|
* => 6 DAIs = 4xCPU + 2xCodec
|
|
* => 1 ccnf = 1xdummy-Codec
|
|
*
|
|
* ex3)
|
|
* CPU0 --- Codec0 link : 6
|
|
* CPU1 -/ dais : 6
|
|
* CPU2 --- Codec1 ccnf : 2
|
|
* CPU3 -/
|
|
*
|
|
* => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
|
|
* => 6 DAIs = 4xCPU + 2xCodec
|
|
* => 2 ccnf = 2xdummy-Codec
|
|
*
|
|
* ex4)
|
|
* CPU0 --- Codec0 (convert-rate) link : 3
|
|
* CPU1 --- Codec1 dais : 4
|
|
* ccnf : 1
|
|
*
|
|
* => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
|
|
* => 4 DAIs = 2xCPU + 2xCodec
|
|
* => 1 ccnf = 1xdummy-Codec
|
|
*/
|
|
return graph_for_each_link(priv, li,
|
|
graph_count_noml,
|
|
graph_count_dpcm);
|
|
}
|
|
|
|
static int graph_probe(struct platform_device *pdev)
|
|
{
|
|
struct asoc_simple_priv *priv;
|
|
struct device *dev = &pdev->dev;
|
|
struct snd_soc_card *card;
|
|
|
|
/* Allocate the private data and the DAI link array */
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
card = simple_priv_to_card(priv);
|
|
card->dapm_widgets = graph_dapm_widgets;
|
|
card->num_dapm_widgets = ARRAY_SIZE(graph_dapm_widgets);
|
|
card->probe = asoc_graph_card_probe;
|
|
|
|
if (of_device_get_match_data(dev))
|
|
priv->dpcm_selectable = 1;
|
|
|
|
return audio_graph_parse_of(priv, dev);
|
|
}
|
|
|
|
static const struct of_device_id graph_of_match[] = {
|
|
{ .compatible = "audio-graph-card", },
|
|
{ .compatible = "audio-graph-scu-card",
|
|
.data = (void *)DPCM_SELECTABLE },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, graph_of_match);
|
|
|
|
static struct platform_driver graph_card = {
|
|
.driver = {
|
|
.name = "asoc-audio-graph-card",
|
|
.pm = &snd_soc_pm_ops,
|
|
.of_match_table = graph_of_match,
|
|
},
|
|
.probe = graph_probe,
|
|
.remove = asoc_simple_remove,
|
|
};
|
|
module_platform_driver(graph_card);
|
|
|
|
MODULE_ALIAS("platform:asoc-audio-graph-card");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
|
|
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
|