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777 lines
19 KiB
777 lines
19 KiB
// 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 <[email protected]> |
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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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#define PREFIX "audio-graph-card," |
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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(dev, top, NULL, adata); |
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asoc_simple_parse_convert(dev, node, PREFIX, adata); |
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asoc_simple_parse_convert(dev, ports, NULL, adata); |
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asoc_simple_parse_convert(dev, port, NULL, adata); |
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asoc_simple_parse_convert(dev, 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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struct device_node *node = of_graph_get_port_parent(ep); |
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of_property_read_u32(top, "mclk-fs", &props->mclk_fs); |
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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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of_node_put(node); |
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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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int dup_codec) |
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{ |
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struct device *dev = simple_priv_to_dev(priv); |
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struct snd_soc_card *card = simple_priv_to_card(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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struct device_node *port; |
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struct device_node *ports; |
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struct device_node *node; |
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struct asoc_simple_dai *dai; |
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struct snd_soc_dai_link_component *cpus = dai_link->cpus; |
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struct snd_soc_dai_link_component *codecs = dai_link->codecs; |
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int ret; |
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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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if (!li->cpu && !codec_ep) |
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return 0; |
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/* Do it all CPU endpoint, and 1st Codec endpoint */ |
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if (!li->cpu && dup_codec) |
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return 0; |
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port = of_get_parent(ep); |
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ports = of_get_parent(port); |
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node = of_graph_get_port_parent(ep); |
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li->link++; |
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dev_dbg(dev, "link_of DPCM (%pOF)\n", ep); |
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if (li->cpu) { |
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int is_single_links = 0; |
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/* Codec is dummy */ |
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codecs->of_node = NULL; |
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codecs->dai_name = "snd-soc-dummy-dai"; |
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codecs->name = "snd-soc-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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dai = |
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dai_props->cpu_dai = &priv->dais[li->dais++]; |
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ret = asoc_simple_parse_cpu(ep, dai_link, &is_single_links); |
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if (ret) |
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goto out_put_node; |
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ret = asoc_simple_parse_clk_cpu(dev, ep, dai_link, dai); |
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if (ret < 0) |
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goto out_put_node; |
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ret = asoc_simple_set_dailink_name(dev, dai_link, |
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"fe.%pOFP.%s", |
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cpus->of_node, |
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cpus->dai_name); |
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if (ret < 0) |
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goto out_put_node; |
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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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/* card->num_links includes Codec */ |
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asoc_simple_canonicalize_cpu(dai_link, is_single_links); |
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} else { |
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struct snd_soc_codec_conf *cconf; |
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/* CPU is dummy */ |
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cpus->of_node = NULL; |
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cpus->dai_name = "snd-soc-dummy-dai"; |
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cpus->name = "snd-soc-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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dai = |
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dai_props->codec_dai = &priv->dais[li->dais++]; |
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cconf = |
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dai_props->codec_conf = &priv->codec_conf[li->conf++]; |
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ret = asoc_simple_parse_codec(ep, dai_link); |
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if (ret < 0) |
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goto out_put_node; |
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ret = asoc_simple_parse_clk_codec(dev, ep, dai_link, dai); |
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if (ret < 0) |
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goto out_put_node; |
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ret = asoc_simple_set_dailink_name(dev, dai_link, |
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"be.%pOFP.%s", |
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codecs->of_node, |
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codecs->dai_name); |
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if (ret < 0) |
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goto out_put_node; |
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/* check "prefix" from top node */ |
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snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node, |
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"prefix"); |
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snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node, |
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PREFIX "prefix"); |
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snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, |
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"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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} |
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graph_parse_convert(dev, ep, &dai_props->adata); |
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graph_parse_mclk_fs(top, ep, dai_props); |
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asoc_simple_canonicalize_platform(dai_link); |
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ret = asoc_simple_parse_tdm(ep, dai); |
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if (ret) |
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goto out_put_node; |
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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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goto out_put_node; |
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snd_soc_dai_link_set_capabilities(dai_link); |
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dai_link->ops = &graph_ops; |
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/* Use custom snd_soc_ops callbacks if available */ |
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if (priv->ops) |
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dai_link->ops = priv->ops; |
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dai_link->init = asoc_simple_dai_init; |
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out_put_node: |
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of_node_put(ports); |
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of_node_put(port); |
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of_node_put(node); |
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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 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 asoc_simple_dai *cpu_dai; |
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struct asoc_simple_dai *codec_dai; |
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int ret, single_cpu = 0; |
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/* Do it only CPU turn */ |
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if (!li->cpu) |
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return 0; |
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dev_dbg(dev, "link_of (%pOF)\n", cpu_ep); |
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li->link++; |
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cpu_dai = |
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dai_props->cpu_dai = &priv->dais[li->dais++]; |
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codec_dai = |
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dai_props->codec_dai = &priv->dais[li->dais++]; |
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/* Factor to mclk, used in hw_params() */ |
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graph_parse_mclk_fs(top, cpu_ep, dai_props); |
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graph_parse_mclk_fs(top, codec_ep, dai_props); |
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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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ret = asoc_simple_parse_cpu(cpu_ep, dai_link, &single_cpu); |
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if (ret < 0) |
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return ret; |
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ret = asoc_simple_parse_codec(codec_ep, dai_link); |
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if (ret < 0) |
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return ret; |
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ret = asoc_simple_parse_tdm(cpu_ep, cpu_dai); |
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if (ret < 0) |
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return ret; |
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ret = asoc_simple_parse_tdm(codec_ep, codec_dai); |
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if (ret < 0) |
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return ret; |
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ret = asoc_simple_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai); |
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if (ret < 0) |
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return ret; |
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ret = asoc_simple_parse_clk_codec(dev, codec_ep, dai_link, codec_dai); |
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if (ret < 0) |
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return ret; |
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ret = asoc_simple_set_dailink_name(dev, dai_link, |
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"%s-%s", |
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dai_link->cpus->dai_name, |
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dai_link->codecs->dai_name); |
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if (ret < 0) |
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return ret; |
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dai_link->ops = &graph_ops; |
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dai_link->init = asoc_simple_dai_init; |
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asoc_simple_canonicalize_cpu(dai_link, single_cpu); |
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asoc_simple_canonicalize_platform(dai_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, int dup_codec)) |
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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; |
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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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|
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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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|
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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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ret = func_dpcm(priv, cpu_ep, codec_ep, li, |
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(codec_port_old == codec_port)); |
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/* else normal sound */ |
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else |
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ret = func_noml(priv, cpu_ep, codec_ep, li); |
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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; |
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} |
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static void graph_get_dais_count(struct asoc_simple_priv *priv, |
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struct link_info *li); |
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|
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int audio_graph_parse_of(struct asoc_simple_priv *priv, struct device *dev) |
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{ |
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struct snd_soc_card *card = simple_priv_to_card(priv); |
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struct link_info li; |
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int ret; |
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|
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card->owner = THIS_MODULE; |
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card->dev = dev; |
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|
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memset(&li, 0, sizeof(li)); |
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graph_get_dais_count(priv, &li); |
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if (!li.link || !li.dais) |
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return -EINVAL; |
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ret = asoc_simple_init_priv(priv, &li); |
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if (ret < 0) |
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return ret; |
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|
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priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW); |
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if (IS_ERR(priv->pa_gpio)) { |
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ret = PTR_ERR(priv->pa_gpio); |
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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)); |
|
for (li.cpu = 1; li.cpu >= 0; li.cpu--) { |
|
/* |
|
* 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; |
|
*/ |
|
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; |
|
|
|
return 0; |
|
|
|
err: |
|
asoc_simple_clean_reference(card); |
|
|
|
if (ret != -EPROBE_DEFER) |
|
dev_err(dev, "parse error %d\n", ret); |
|
|
|
return ret; |
|
} |
|
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); |
|
|
|
li->link += 1; /* 1xCPU-Codec */ |
|
li->dais += 2; /* 1xCPU + 1xCodec */ |
|
|
|
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, |
|
int dup_codec) |
|
{ |
|
struct device *dev = simple_priv_to_dev(priv); |
|
|
|
li->link++; /* 1xCPU-dummy */ |
|
li->dais++; /* 1xCPU */ |
|
|
|
if (!dup_codec && codec_ep) { |
|
li->link++; /* 1xdummy-Codec */ |
|
li->conf++; /* 1xdummy-Codec */ |
|
li->dais++; /* 1xCodec */ |
|
} |
|
|
|
dev_dbg(dev, "Count As DPCM\n"); |
|
|
|
return 0; |
|
} |
|
|
|
static void graph_get_dais_count(struct asoc_simple_priv *priv, |
|
struct link_info *li) |
|
{ |
|
struct device *dev = simple_priv_to_dev(priv); |
|
|
|
/* |
|
* 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 |
|
*/ |
|
graph_for_each_link(priv, li, |
|
graph_count_noml, |
|
graph_count_dpcm); |
|
dev_dbg(dev, "link %d, dais %d, ccnf %d\n", |
|
li->link, li->dais, li->conf); |
|
} |
|
|
|
int audio_graph_card_probe(struct snd_soc_card *card) |
|
{ |
|
struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(card); |
|
int ret; |
|
|
|
ret = asoc_simple_init_hp(card, &priv->hp_jack, NULL); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = asoc_simple_init_mic(card, &priv->mic_jack, NULL); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(audio_graph_card_probe); |
|
|
|
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 = audio_graph_card_probe; |
|
|
|
if (of_device_get_match_data(dev)) |
|
priv->dpcm_selectable = 1; |
|
|
|
return audio_graph_parse_of(priv, dev); |
|
} |
|
|
|
int audio_graph_remove(struct platform_device *pdev) |
|
{ |
|
struct snd_soc_card *card = platform_get_drvdata(pdev); |
|
|
|
return asoc_simple_clean_reference(card); |
|
} |
|
EXPORT_SYMBOL_GPL(audio_graph_remove); |
|
|
|
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 = audio_graph_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 <[email protected]>");
|
|
|