[PATCH v4 10/16] ASoC: add Audio Graph Card2 Custom Sample
Kuninori Morimoto
kuninori.morimoto.gx at renesas.com
Wed Oct 6 02:35:33 CEST 2021
From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
audio-graph-card2 has customizing support.
This means user can re-use audio-graph-card2 DT parsing, and possible
to expand to own special handling.
This patch adds Audio Graph Card2 Customize Sample Driver.
It can re-use audio-graph-card2 parsing by calling
audio_graph2_parse_of(...), and user can expand each functions by
using hooks.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
sound/soc/generic/Kconfig | 6 +
sound/soc/generic/Makefile | 2 +
.../generic/audio-graph-card2-custom-sample.c | 174 ++++++++++++++++++
3 files changed, 182 insertions(+)
create mode 100644 sound/soc/generic/audio-graph-card2-custom-sample.c
diff --git a/sound/soc/generic/Kconfig b/sound/soc/generic/Kconfig
index 829ca2b0bf76..b6df4e26bc4a 100644
--- a/sound/soc/generic/Kconfig
+++ b/sound/soc/generic/Kconfig
@@ -26,6 +26,12 @@ config SND_AUDIO_GRAPH_CARD2
This option enables generic simple sound card2 support
with OF-graph DT bindings.
+config SND_AUDIO_GRAPH_CARD2_CUSTOM_SAMPLE
+ tristate "ASoC Audio Graph Card2 base custom sample support"
+ depends on SND_AUDIO_GRAPH_CARD2
+ help
+ This option enables Audio Graph Card2 base custom sample
+
config SND_TEST_COMPONENT
tristate "ASoC Test component sound support"
depends on OF
diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile
index b480f47a330d..084862156506 100644
--- a/sound/soc/generic/Makefile
+++ b/sound/soc/generic/Makefile
@@ -3,10 +3,12 @@ snd-soc-simple-card-utils-objs := simple-card-utils.o
snd-soc-simple-card-objs := simple-card.o
snd-soc-audio-graph-card-objs := audio-graph-card.o
snd-soc-audio-graph-card2-objs := audio-graph-card2.o
+snd-soc-audio-graph-card2-custom-sample-objs := audio-graph-card2-custom-sample.o
snd-soc-test-component-objs := test-component.o
obj-$(CONFIG_SND_SIMPLE_CARD_UTILS) += snd-soc-simple-card-utils.o
obj-$(CONFIG_SND_SIMPLE_CARD) += snd-soc-simple-card.o
obj-$(CONFIG_SND_AUDIO_GRAPH_CARD) += snd-soc-audio-graph-card.o
obj-$(CONFIG_SND_AUDIO_GRAPH_CARD2) += snd-soc-audio-graph-card2.o
+obj-$(CONFIG_SND_AUDIO_GRAPH_CARD2_CUSTOM_SAMPLE) += snd-soc-audio-graph-card2-custom-sample.o
obj-$(CONFIG_SND_TEST_COMPONENT) += snd-soc-test-component.o
diff --git a/sound/soc/generic/audio-graph-card2-custom-sample.c b/sound/soc/generic/audio-graph-card2-custom-sample.c
new file mode 100644
index 000000000000..25fe40aa5aca
--- /dev/null
+++ b/sound/soc/generic/audio-graph-card2-custom-sample.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// audio-graph-card2-custom-sample.c
+//
+// Copyright (C) 2020 Renesas Electronics Corp.
+// Copyright (C) 2020 Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
+//
+#include <linux/module.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <sound/graph_card.h>
+
+/*
+ * Custom driver can have own priv
+ * which includes asoc_simple_priv.
+ */
+struct custom_priv {
+ struct asoc_simple_priv simple_priv;
+
+ /* custom driver's own params */
+ int custom_params;
+};
+
+/* You can get custom_priv from simple_priv */
+#define simple_to_custom(simple) container_of((simple), struct custom_priv, simple_priv)
+
+static int custom_card_probe(struct snd_soc_card *card)
+{
+ struct asoc_simple_priv *simple_priv = snd_soc_card_get_drvdata(card);
+ struct custom_priv *custom_priv = simple_to_custom(simple_priv);
+ struct device *dev = simple_priv_to_dev(simple_priv);
+
+ dev_info(dev, "custom probe\n");
+
+ custom_priv->custom_params = 1;
+
+ /* you can use generic probe function */
+ return asoc_graph_card_probe(card);
+}
+
+static int custom_hook_pre(struct asoc_simple_priv *priv)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+
+ /* You can custom before parsing */
+ dev_info(dev, "hook : %s\n", __func__);
+
+ return 0;
+}
+
+static int custom_hook_post(struct asoc_simple_priv *priv)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+ struct snd_soc_card *card;
+
+ /* You can custom after parsing */
+ dev_info(dev, "hook : %s\n", __func__);
+
+ card = simple_priv_to_card(priv);
+ card->probe = custom_card_probe; /* overwrite .probe */
+
+ return 0;
+}
+
+static int custom_normal(struct asoc_simple_priv *priv,
+ struct device_node *lnk,
+ struct link_info *li)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+
+ /* You can custom for DPCM parsing */
+ dev_info(dev, "hook : %s\n", __func__);
+
+ return audio_graph2_link_normal(priv, lnk, li);
+}
+
+
+static int custom_dpcm(struct asoc_simple_priv *priv,
+ struct device_node *lnk,
+ struct link_info *li)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+
+ /* You can custom for DPCM parsing */
+ dev_info(dev, "hook : %s\n", __func__);
+
+ return audio_graph2_link_dpcm(priv, lnk, li);
+}
+
+static int custom_c2c(struct asoc_simple_priv *priv,
+ struct device_node *lnk,
+ struct link_info *li)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+
+ /* You can custom for Codec2Codec parsing */
+ dev_info(dev, "hook : %s\n", __func__);
+
+ return audio_graph2_link_c2c(priv, lnk, li);
+}
+
+/*
+ * audio-graph-card2 has many hooks for your customizing.
+ */
+static struct graph2_custom_hooks custom_hooks = {
+ .hook_pre = custom_hook_pre,
+ .hook_post = custom_hook_post,
+ .custom_normal = custom_normal,
+ .custom_dpcm = custom_dpcm,
+ .custom_c2c = custom_c2c,
+};
+
+static int custom_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct device *dev = simple_priv_to_dev(priv);
+
+ dev_info(dev, "custom startup\n");
+
+ return asoc_simple_startup(substream);
+}
+
+/* You can use custom ops */
+static const struct snd_soc_ops custom_ops = {
+ .startup = custom_startup,
+ .shutdown = asoc_simple_shutdown,
+ .hw_params = asoc_simple_hw_params,
+};
+
+static int custom_probe(struct platform_device *pdev)
+{
+ struct custom_priv *custom_priv;
+ struct asoc_simple_priv *simple_priv;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ custom_priv = devm_kzalloc(dev, sizeof(*custom_priv), GFP_KERNEL);
+ if (!custom_priv)
+ return -ENOMEM;
+
+ simple_priv = &custom_priv->simple_priv;
+ simple_priv->ops = &custom_ops; /* customize dai_link ops */
+
+ /* use audio-graph-card2 parsing with own custom hooks */
+ ret = audio_graph2_parse_of(simple_priv, dev, &custom_hooks);
+ if (ret < 0)
+ return ret;
+
+ /* customize more if needed */
+
+ return 0;
+}
+
+static const struct of_device_id custom_of_match[] = {
+ { .compatible = "audio-graph-card2-custom-sample", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, custom_of_match);
+
+static struct platform_driver custom_card = {
+ .driver = {
+ .name = "audio-graph-card2-custom-sample",
+ .of_match_table = custom_of_match,
+ },
+ .probe = custom_probe,
+ .remove = asoc_simple_remove,
+};
+module_platform_driver(custom_card);
+
+MODULE_ALIAS("platform:asoc-audio-graph-card2-custom-sample");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ASoC Audio Graph Card2 Custom Sample");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>");
--
2.25.1
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