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SubjectRe: [PATCH v6 2/2] ASoC: qcom: SC7280: Add machine driver
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On 18/11/2021 12:45, Srinivasa Rao Mandadapu wrote:
> Add new machine driver to register sound card on sc7280 based targets and
> do the required configuration for lpass cpu dai and external codecs
> connected over MI2S and soundwire interfaces.
> Add support for audio jack detection, soundwire init and MBHC.
>
> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
> ---
> sound/soc/qcom/Kconfig | 12 ++
> sound/soc/qcom/Makefile | 2 +
> sound/soc/qcom/sc7280.c | 299 ++++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 313 insertions(+)
> create mode 100644 sound/soc/qcom/sc7280.c
>
> diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
> index cc7c1de..530d01f 100644
> --- a/sound/soc/qcom/Kconfig
> +++ b/sound/soc/qcom/Kconfig
> @@ -152,4 +152,16 @@ config SND_SOC_SC7180
> SC7180 SoC-based systems.
> Say Y if you want to use audio device on this SoCs.
>
> +config SND_SOC_SC7280
> + tristate "SoC Machine driver for SC7280 boards"
> + depends on I2C && SOUNDWIRE || COMPILE_TEST
> + select SND_SOC_QCOM_COMMON
> + select SND_SOC_MAX98357A
> + select SND_SOC_LPASS_RX_MACRO
> + select SND_SOC_LPASS_TX_MACRO

Consider adding

+ select SND_SOC_LPASS_SC7280
+ select SND_SOC_WCD938X


and remove them from "[PATCH v6 10/10] ASoC: qcom: SC7280: Update config
for building codec dma drivers"


> + Add support for audio on Qualcomm Technologies Inc.
> + SC7280 SoC-based systems.
> + Say Y or M if you want to use audio device on this SoCs.
> +
> endif #SND_SOC_QCOM
> diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
> index 1600ae5..625aec6 100644
> --- a/sound/soc/qcom/Makefile
> +++ b/sound/soc/qcom/Makefile
> @@ -19,6 +19,7 @@ snd-soc-storm-objs := storm.o
> snd-soc-apq8016-sbc-objs := apq8016_sbc.o
> snd-soc-apq8096-objs := apq8096.o
> snd-soc-sc7180-objs := sc7180.o
> +snd-soc-sc7280-objs := sc7280.o
> snd-soc-sdm845-objs := sdm845.o
> snd-soc-sm8250-objs := sm8250.o
> snd-soc-qcom-common-objs := common.o
> @@ -27,6 +28,7 @@ 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_SC7180) += snd-soc-sc7180.o
> +obj-$(CONFIG_SND_SOC_SC7280) += snd-soc-sc7280.o
> obj-$(CONFIG_SND_SOC_SDM845) += snd-soc-sdm845.o
> obj-$(CONFIG_SND_SOC_SM8250) += snd-soc-sm8250.o
> obj-$(CONFIG_SND_SOC_QCOM_COMMON) += snd-soc-qcom-common.o
> diff --git a/sound/soc/qcom/sc7280.c b/sound/soc/qcom/sc7280.c
> new file mode 100644
> index 0000000..c20d4ab1
> --- /dev/null
> +++ b/sound/soc/qcom/sc7280.c
> @@ -0,0 +1,299 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +//
> +// Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
> +//
> +// ALSA SoC Machine driver for sc7280
> +
> +#include <linux/gpio.h>
> +#include <linux/gpio/consumer.h>
Why do we need this?

> +#include <linux/input.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <sound/core.h>
> +#include <sound/jack.h>
> +#include <sound/pcm.h>
> +#include <sound/soc.h>
> +
> +#include <dt-bindings/sound/sc7180-lpass.h>
> +#include <dt-bindings/sound/qcom,q6afe.h>
Why this include?

> +
> +#include "../codecs/wcd938x.h"

Why do we need the codec header file here?

> +#include "common.h"
> +#include "lpass.h"
> +
> +#define LPASS_MAX_PORTS (LPASS_CDC_DMA_VA_TX8 + 1)

May be add this in lpass.h instead of machine file.

> +
> +struct sc7280_snd_data {
> + bool stream_prepared[LPASS_MAX_PORTS];
move this to the end of struct.

> + struct snd_soc_card card;
> + struct sdw_stream_runtime *sruntime[LPASS_MAX_PORTS];
> + struct snd_soc_jack hs_jack;
> + struct snd_soc_jack hdmi_jack;
> + bool jack_setup;
> +};
> +
> +static void sc7280_jack_free(struct snd_jack *jack)
> +{
> + struct snd_soc_component *component = jack->private_data;
> +
> + snd_soc_component_set_jack(component, NULL, NULL);
> +}
> +
> +static int sc7280_headset_init(struct snd_soc_pcm_runtime *rtd)
> +{
> + struct snd_soc_card *card = rtd->card;
> + struct sc7280_snd_data *pdata = snd_soc_card_get_drvdata(card);
> + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
> + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
> + struct snd_soc_component *component = codec_dai->component;
> + struct snd_jack *jack;
> + int rval, i;
> +
> + if (!pdata->jack_setup) {
> + rval = snd_soc_card_jack_new(card, "Headset Jack",
> + SND_JACK_HEADSET | SND_JACK_LINEOUT |
> + SND_JACK_MECHANICAL |
> + SND_JACK_BTN_0 | SND_JACK_BTN_1 |
> + SND_JACK_BTN_2 | SND_JACK_BTN_3 |
> + SND_JACK_BTN_4 | SND_JACK_BTN_5,
> + &pdata->hs_jack, NULL, 0);
> +
> + if (rval < 0) {
> + dev_err(card->dev, "Unable to add Headset Jack\n");
> + return rval;
> + }
> +
> + jack = pdata->hs_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);
> +
> + jack->private_data = component;
> + jack->private_free = sc7280_jack_free;
> + pdata->jack_setup = true;
> + }
> + switch (cpu_dai->id) {
> + case LPASS_CDC_DMA_RX0:
> + case LPASS_CDC_DMA_TX3:
> + for_each_rtd_codec_dais(rtd, i, codec_dai) {
> + rval = snd_soc_component_set_jack(component, &pdata->hs_jack, NULL);
> + if (rval != 0 && rval != -ENOTSUPP) {
> + dev_err(card->dev, "Failed to set jack: %d\n", rval);
> + return rval;
> + }
> + }
> +
> + break;
> + default:
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static int sc7280_hdmi_init(struct snd_soc_pcm_runtime *rtd)
> +{
> + struct snd_soc_card *card = rtd->card;
> + struct sc7280_snd_data *pdata = snd_soc_card_get_drvdata(card);
> + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
> + struct snd_soc_component *component = codec_dai->component;
> + struct snd_jack *jack;
> + int rval;
> +
> + rval = snd_soc_card_jack_new(
> + card, "HDMI Jack",
> + SND_JACK_LINEOUT,
> + &pdata->hdmi_jack, NULL, 0);

you could probably warp this up to 100 chars

> +
> + if (rval < 0) {
> + dev_err(card->dev, "Unable to add HDMI Jack\n");
> + return rval;
> + }
> +
> + jack = pdata->hdmi_jack.jack;
> + jack->private_data = component;
> + jack->private_free = sc7280_jack_free;
> +
> + return snd_soc_component_set_jack(component, &pdata->hdmi_jack, NULL);
> +}
> +
> +static int sc7280_init(struct snd_soc_pcm_runtime *rtd)
> +{
> + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
> +
> + switch (cpu_dai->id) {
> + case LPASS_CDC_DMA_TX3:
> + return sc7280_headset_init(rtd);
> + case LPASS_CDC_DMA_RX0:
> + case LPASS_CDC_DMA_VA_TX0:
> + case MI2S_SECONDARY:
> + return 0;
> + case LPASS_DP_RX:
> + return sc7280_hdmi_init(rtd);
> + default:
> + dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int sc7280_snd_hw_params(struct snd_pcm_substream *substream,
> + struct snd_pcm_hw_params *params)
> +{
> + struct snd_pcm_runtime *runtime = substream->runtime;
> + struct snd_soc_pcm_runtime *rtd = substream->private_data;
> + struct snd_soc_dai *codec_dai;
> + const struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
> + struct sc7280_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card);
> + struct sdw_stream_runtime *sruntime;
> + int i;
> +
> + snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2, 2);
> + snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 48000, 48000);
> +
> + switch (cpu_dai->id) {
> + case LPASS_CDC_DMA_TX3:
> + case LPASS_CDC_DMA_RX0:
> + for_each_rtd_codec_dais(rtd, i, codec_dai) {
> + sruntime = snd_soc_dai_get_sdw_stream(codec_dai, substream->stream);
> + if (sruntime != ERR_PTR(-ENOTSUPP))
> + pdata->sruntime[cpu_dai->id] = sruntime;
> + }
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static int sc7280_snd_swr_prepare(struct snd_pcm_substream *substream)
> +{
> + struct snd_soc_pcm_runtime *rtd = substream->private_data;
> + const struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
> + struct sc7280_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
> + struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
> + int ret;
> +
> + if (!sruntime)
> + return 0;
> +
> + if (data->stream_prepared[cpu_dai->id]) {
> + sdw_disable_stream(sruntime);
> + sdw_deprepare_stream(sruntime);
> + data->stream_prepared[cpu_dai->id] = false;
> + }
> +
> + ret = sdw_prepare_stream(sruntime);
> + if (ret)
> + return ret;
> +
> + ret = sdw_enable_stream(sruntime);
> + if (ret) {
> + sdw_deprepare_stream(sruntime);
> + return ret;
> + }
> + data->stream_prepared[cpu_dai->id] = true;
> +
> + return ret;
> +}
> +
> +static int sc7280_snd_prepare(struct snd_pcm_substream *substream)
> +{
> + struct snd_soc_pcm_runtime *rtd = substream->private_data;
> + const struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
> +
> + switch (cpu_dai->id) {
> + case LPASS_CDC_DMA_RX0:
> + case LPASS_CDC_DMA_TX3:
> + return sc7280_snd_swr_prepare(substream);
> + default:
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static int sc7280_snd_hw_free(struct snd_pcm_substream *substream)
> +{
> + struct snd_soc_pcm_runtime *rtd = substream->private_data;
> + struct sc7280_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
> + const struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
> + struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
> +
> + switch (cpu_dai->id) {
> + case LPASS_CDC_DMA_RX0:
> + case LPASS_CDC_DMA_TX3:
> + if (sruntime && data->stream_prepared[cpu_dai->id]) {
> + sdw_disable_stream(sruntime);
> + sdw_deprepare_stream(sruntime);
> + data->stream_prepared[cpu_dai->id] = false;
> + }
> + break;
> + default:
> + break;
> + }
> + return 0;
> +}
> +
> +static const struct snd_soc_ops sc7280_ops = {
> + .hw_params = sc7280_snd_hw_params,
> + .hw_free = sc7280_snd_hw_free,
> + .prepare = sc7280_snd_prepare,
> +};
> +
> +static const struct snd_soc_dapm_widget sc7280_snd_widgets[] = {
> + SND_SOC_DAPM_HP("Headphone Jack", NULL),
> + SND_SOC_DAPM_MIC("Headset Mic", NULL),
> +};
> +
> +static int sc7280_snd_platform_probe(struct platform_device *pdev)
> +{
> + struct snd_soc_card *card;
> + struct sc7280_snd_data *data;
> + struct device *dev = &pdev->dev;
> + struct snd_soc_dai_link *link;
> + int ret, i;
> +
> + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
> + if (!data)
> + return -ENOMEM;
> +
> + card = &data->card;
> + snd_soc_card_set_drvdata(card, data);
> +
> + card->owner = THIS_MODULE;
> + card->driver_name = "SC7280";
> + card->dev = dev;
> +
> + ret = qcom_snd_parse_of(card);
> + if (ret)
> + return ret;
> +
> + for_each_card_prelinks(card, i, link) {
> + link->init = sc7280_init;
> + link->ops = &sc7280_ops;
> + }
> +
> + return devm_snd_soc_register_card(dev, card);
> +}
> +
> +static const struct of_device_id sc7280_snd_device_id[] = {
> + { .compatible = "google,sc7280-herobrine" },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, sc7280_snd_device_id);
> +
> +static struct platform_driver sc7280_snd_driver = {
> + .probe = sc7280_snd_platform_probe,
> + .driver = {
> + .name = "msm-snd-sc7280",
> + .of_match_table = sc7280_snd_device_id,
> + .pm = &snd_soc_pm_ops,
> + },
> +};
> +module_platform_driver(sc7280_snd_driver);
> +
> +MODULE_DESCRIPTION("sc7280 ASoC Machine Driver");
> +MODULE_LICENSE("GPL v2");
"GPL" should be good enough here.

--srini
>

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