[PATCH 2/2] ASoC: qcom: sc7180: Add machine driver for sound card registration
Cheng-Yi Chiang
cychiang at chromium.org
Fri Jul 17 14:02:07 CEST 2020
From: Ajit Pandey <ajitp at codeaurora.org>
Add new driver to register sound card on sc7180 trogdor board and
do the required configuration for lpass cpu dai and external codecs
connected over MI2S interfaces.
Signed-off-by: Ajit Pandey <ajitp at codeaurora.org>
Signed-off-by: Cheng-Yi Chiang <cychiang at chromium.org>
---
Note:
- This patch depends on this patch series so it is not ready to be merged now.
ASoC: qcom: Add support for SC7180 lpass variant https://patchwork.kernel.org/cover/11650649/
- The patch is made by the collaboration of
Cheng-Yi Chiang <cychiang at chromium.org>
Rohit kumar <rohitkr at codeaurora.org>
Ajit Pandey <ajitp at codeaurora.org>
But Ajit has left codeaurora.
- We may reduce the duplicate code of sc7180_parse_of and qcom_snd_parse_of in snd/soc/qcom/common.c.
However, qcom_snd_parse_of has specific logic with qdsp. In this initial version, to keep it simple,
I choose to only implement needed device property parsing by sc7180 sound card in sc7180_parse_of.
Thanks for the review!
sound/soc/qcom/Kconfig | 11 ++
sound/soc/qcom/Makefile | 2 +
sound/soc/qcom/sc7180.c | 410 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 423 insertions(+)
create mode 100644 sound/soc/qcom/sc7180.c
diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index cfca0f730c61..4adc2362865b 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -109,3 +109,14 @@ config SND_SOC_SDM845
To add support for audio on Qualcomm Technologies Inc.
SDM845 SoC-based systems.
Say Y if you want to use audio device on this SoCs.
+
+config SND_SOC_SC7180
+ tristate "SoC Machine driver for SC7180 boards"
+ depends on SND_SOC_QCOM
+ select SND_SOC_LPASS_SC7180
+ select SND_SOC_MAX98357A
+ select SND_SOC_RT5682
+ help
+ To add support for audio on Qualcomm Technologies Inc.
+ SC7180 SoC-based systems.
+ Say Y if you want to use audio device on this SoCs.
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 41b2c7a23a4d..3f6275d90526 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -15,12 +15,14 @@ snd-soc-storm-objs := storm.o
snd-soc-apq8016-sbc-objs := apq8016_sbc.o
snd-soc-apq8096-objs := apq8096.o
snd-soc-sdm845-objs := sdm845.o
+snd-soc-sc7180-objs := sc7180.o
snd-soc-qcom-common-objs := common.o
obj-$(CONFIG_SND_SOC_STORM) += snd-soc-storm.o
obj-$(CONFIG_SND_SOC_APQ8016_SBC) += snd-soc-apq8016-sbc.o
obj-$(CONFIG_SND_SOC_MSM8996) += snd-soc-apq8096.o
obj-$(CONFIG_SND_SOC_SDM845) += snd-soc-sdm845.o
+obj-$(CONFIG_SND_SOC_SC7180) += snd-soc-sc7180.o
obj-$(CONFIG_SND_SOC_QCOM_COMMON) += snd-soc-qcom-common.o
#DSP lib
diff --git a/sound/soc/qcom/sc7180.c b/sound/soc/qcom/sc7180.c
new file mode 100644
index 000000000000..cbe6b487d432
--- /dev/null
+++ b/sound/soc/qcom/sc7180.c
@@ -0,0 +1,410 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ *
+ * sc7180.c -- ALSA SoC Machine driver for SC7180
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/jack.h>
+#include <sound/soc.h>
+#include <uapi/linux/input-event-codes.h>
+#include <dt-bindings/sound/sc7180-lpass.h>
+#include "../codecs/rt5682.h"
+#include "common.h"
+#include "lpass.h"
+
+#define DEFAULT_SAMPLE_RATE_48K 48000
+#define DEFAULT_MCLK_RATE 19200000
+#define RT5682_PLL1_FREQ (48000 * 512)
+
+int sc7180_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, dir;
+
+ ret = snd_soc_of_parse_card_name(card, "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;
+ }
+
+ /* Populate links */
+ num_links = of_get_child_count(dev->of_node);
+
+ /* Allocate the DAI link array */
+ card->dai_link = kcalloc(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)
+ return -ENOMEM;
+
+ 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;
+ }
+
+ of_property_read_u32(np, "unidirectional", &dir);
+ if (dir == 0)
+ link->playback_only = 1;
+ else if (dir == 1)
+ link->capture_only = 1;
+
+ cpu = of_get_child_by_name(np, "cpu");
+ 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) {
+ dev_err(card->dev, "%s: error getting cpu dai name\n",
+ link->name);
+ goto err;
+ }
+
+ if (codec) {
+ ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
+ if (ret < 0) {
+ dev_err(card->dev, "%s: codec dai not found\n",
+ link->name);
+ goto err;
+ }
+ } else {
+ dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
+ if (!dlc)
+ return -ENOMEM;
+
+ link->codecs = dlc;
+ link->num_codecs = 1;
+
+ link->codecs->dai_name = "snd-soc-dummy-dai";
+ link->codecs->name = "snd-soc-dummy";
+ }
+
+ link->platforms->of_node = link->cpus->of_node;
+ link->stream_name = link->name;
+ link++;
+
+ of_node_put(cpu);
+ of_node_put(codec);
+ }
+
+ return 0;
+err:
+ of_node_put(np);
+ of_node_put(cpu);
+ of_node_put(codec);
+ of_node_put(platform);
+ kfree(card->dai_link);
+ return ret;
+}
+
+struct sc7180_snd_data {
+ struct snd_soc_jack jack;
+ bool jack_setup;
+ struct snd_soc_card *card;
+ u32 pri_mi2s_clk_count;
+};
+
+static int sc7180_snd_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ int ret = 0;
+
+ switch (cpu_dai->id) {
+ case MI2S_PRIMARY:
+ break;
+ case MI2S_SECONDARY:
+ break;
+ default:
+ pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+ break;
+ }
+ return ret;
+}
+
+static void sc7180_jack_free(struct snd_jack *jack)
+{
+ struct snd_soc_component *component = jack->private_data;
+
+ snd_soc_component_set_jack(component, NULL, NULL);
+}
+
+static int sc7180_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_component *component;
+ struct snd_soc_card *card = rtd->card;
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+ struct sc7180_snd_data *pdata = snd_soc_card_get_drvdata(card);
+ struct snd_jack *jack;
+ int rval;
+
+ if (!pdata->jack_setup) {
+ rval = snd_soc_card_jack_new(
+ card, "Headset Jack",
+ SND_JACK_HEADSET |
+ SND_JACK_HEADPHONE |
+ SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+ SND_JACK_BTN_2 | SND_JACK_BTN_3,
+ &pdata->jack, NULL, 0);
+
+ if (rval < 0) {
+ dev_err(card->dev, "Unable to add Headphone Jack\n");
+ return rval;
+ }
+
+ jack = pdata->jack.jack;
+
+ snd_jack_set_key(jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
+ snd_jack_set_key(jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
+ snd_jack_set_key(jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
+ snd_jack_set_key(jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
+ pdata->jack_setup = true;
+ }
+
+ switch (cpu_dai->id) {
+ case MI2S_PRIMARY:
+ jack = pdata->jack.jack;
+ component = codec_dai->component;
+
+ jack->private_data = component;
+ jack->private_free = sc7180_jack_free;
+ rval = snd_soc_component_set_jack(component,
+ &pdata->jack, NULL);
+ if (rval != 0 && rval != -EOPNOTSUPP) {
+ dev_warn(card->dev, "Failed to set jack: %d\n", rval);
+ return rval;
+ }
+ break;
+ case MI2S_SECONDARY:
+ break;
+ default:
+ pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+ break;
+ }
+
+ return 0;
+}
+
+static int sc7180_snd_startup(struct snd_pcm_substream *substream)
+{
+ unsigned int codec_dai_fmt = SND_SOC_DAIFMT_CBS_CFS;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_card *card = rtd->card;
+ struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+ int ret;
+
+ switch (cpu_dai->id) {
+ case MI2S_PRIMARY:
+ codec_dai_fmt |= SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_I2S;
+ if (++data->pri_mi2s_clk_count == 1) {
+ snd_soc_dai_set_sysclk(cpu_dai,
+ LPASS_MCLK0,
+ DEFAULT_MCLK_RATE,
+ SNDRV_PCM_STREAM_PLAYBACK);
+ }
+ snd_soc_dai_set_fmt(codec_dai, codec_dai_fmt);
+
+ /* Configure PLL1 for codec */
+ ret = snd_soc_dai_set_pll(codec_dai, 0, RT5682_PLL1_S_MCLK,
+ DEFAULT_MCLK_RATE, RT5682_PLL1_FREQ);
+ if (ret < 0) {
+ dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
+ return ret;
+ }
+
+ /* Configure sysclk for codec */
+ ret = snd_soc_dai_set_sysclk(codec_dai, RT5682_SCLK_S_PLL1,
+ RT5682_PLL1_FREQ,
+ SND_SOC_CLOCK_IN);
+ if (ret < 0)
+ dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n",
+ ret);
+
+ break;
+ case MI2S_SECONDARY:
+ break;
+ default:
+ pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+ break;
+ }
+ return 0;
+}
+
+static void sc7180_snd_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_card *card = rtd->card;
+ struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+
+ switch (cpu_dai->id) {
+ case MI2S_PRIMARY:
+ if (--data->pri_mi2s_clk_count == 0) {
+ snd_soc_dai_set_sysclk(cpu_dai,
+ LPASS_MCLK0,
+ 0,
+ SNDRV_PCM_STREAM_PLAYBACK);
+ }
+ break;
+ case MI2S_SECONDARY:
+ break;
+ default:
+ pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+ break;
+ }
+}
+
+static const struct snd_soc_ops sc7180_be_ops = {
+ .hw_params = sc7180_snd_hw_params,
+ .startup = sc7180_snd_startup,
+ .shutdown = sc7180_snd_shutdown,
+};
+
+static const struct snd_soc_dapm_widget sc7180_snd_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_MIC("Headset Mic", NULL),
+};
+
+static void sc7180_add_ops(struct snd_soc_card *card)
+{
+ struct snd_soc_dai_link *link;
+ int i;
+
+ for_each_card_prelinks(card, i, link) {
+ link->ops = &sc7180_be_ops;
+ link->init = sc7180_dai_init;
+ }
+}
+
+static int sc7180_snd_platform_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card;
+ struct sc7180_snd_data *data;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ card = kzalloc(sizeof(*card), GFP_KERNEL);
+ if (!card)
+ return -ENOMEM;
+
+ /* Allocate the private data */
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto data_alloc_fail;
+ }
+
+ card->dapm_widgets = sc7180_snd_widgets;
+ card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets);
+ card->dev = dev;
+ dev_set_drvdata(dev, card);
+ ret = sc7180_parse_of(card);
+ if (ret) {
+ dev_err(dev, "Error parsing OF data\n");
+ goto parse_dt_fail;
+ }
+
+ data->card = card;
+ snd_soc_card_set_drvdata(card, data);
+
+ sc7180_add_ops(card);
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ dev_err(dev, "Sound card registration failed\n");
+ goto register_card_fail;
+ }
+ return ret;
+
+register_card_fail:
+ kfree(card->dai_link);
+parse_dt_fail:
+ kfree(data);
+data_alloc_fail:
+ kfree(card);
+ return ret;
+}
+
+static int sc7180_snd_platform_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = dev_get_drvdata(&pdev->dev);
+ struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card);
+
+ snd_soc_unregister_card(card);
+ kfree(card->dai_link);
+ kfree(data);
+ kfree(card);
+ return 0;
+}
+
+static const struct of_device_id sc7180_snd_device_id[] = {
+ { .compatible = "qcom,sc7180-sndcard" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sc7180_snd_device_id);
+
+static struct platform_driver sc7180_snd_driver = {
+ .probe = sc7180_snd_platform_probe,
+ .remove = sc7180_snd_platform_remove,
+ .driver = {
+ .name = "msm-snd-sc7180",
+ .of_match_table = sc7180_snd_device_id,
+ },
+};
+module_platform_driver(sc7180_snd_driver);
+
+MODULE_DESCRIPTION("sc7180 ASoC Machine Driver");
+MODULE_LICENSE("GPL v2");
--
2.28.0.rc0.105.gf9edc3c819-goog
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