[PATCH v6 2/2] ASoC: qcom: sc7180: Add machine driver for sound card registration
Cheng-yi Chiang
cychiang at chromium.org
Wed Aug 26 07:28:28 EDT 2020
On Wed, Aug 26, 2020 at 7:05 PM Cheng-Yi Chiang <cychiang at chromium.org> wrote:
>
> 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>
> Reviewed-by: Tzung-Bi Shih <tzungbi at google.com>
> ---
> sound/soc/qcom/Kconfig | 12 ++
> sound/soc/qcom/Makefile | 2 +
> sound/soc/qcom/sc7180.c | 244 ++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 258 insertions(+)
> create mode 100644 sound/soc/qcom/sc7180.c
>
> diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
> index a607ace8b089..63678b746299 100644
> --- a/sound/soc/qcom/Kconfig
> +++ b/sound/soc/qcom/Kconfig
> @@ -116,4 +116,16 @@ config SND_SOC_SDM845
> 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_QCOM_COMMON
> + 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.
> +
> endif #SND_SOC_QCOM
> diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
> index 7972c9479ab0..0cdcbf367ef1 100644
> --- a/sound/soc/qcom/Makefile
> +++ b/sound/soc/qcom/Makefile
> @@ -17,12 +17,14 @@ 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..7849376f63ba
> --- /dev/null
> +++ b/sound/soc/qcom/sc7180.c
> @@ -0,0 +1,244 @@
> +// 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 <dt-bindings/sound/sc7180-lpass.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/pcm_params.h>
> +#include <sound/soc.h>
> +#include <uapi/linux/input-event-codes.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)
> +
> +struct sc7180_snd_data {
> + struct snd_soc_jack jack;
> + u32 pri_mi2s_clk_count;
> +};
> +
> +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_headset_init(struct snd_soc_component *component)
> +{
> + struct snd_soc_card *card = component->card;
> + struct sc7180_snd_data *pdata = snd_soc_card_get_drvdata(card);
> + struct snd_jack *jack;
> + int rval;
> +
> + 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 Headset 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);
> +
> + 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;
> + }
> +
> + return 0;
> +}
> +
> +static struct snd_soc_aux_dev sc7180_headset_dev = {
> + .dlc = COMP_EMPTY(),
> + .init = sc7180_headset_init,
> +};
> +
> +static int sc7180_snd_startup(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);
> + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
> + int ret;
> +
> + switch (cpu_dai->id) {
> + case MI2S_PRIMARY:
> + 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,
> + SND_SOC_DAIFMT_CBS_CFS |
> + SND_SOC_DAIFMT_NB_NF |
> + SND_SOC_DAIFMT_I2S);
> +
> + /* 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) {
> + 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)
> + dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n",
> + ret);
> +
> + break;
> + case MI2S_SECONDARY:
> + break;
> + default:
> + dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
> + cpu_dai->id);
> + return -EINVAL;
> + }
> + 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:
> + dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
> + cpu_dai->id);
> + break;
> + }
> +}
> +
> +static const struct snd_soc_ops sc7180_ops = {
> + .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 struct snd_soc_card sc7180_card = {
> + .owner = THIS_MODULE,
> + .aux_dev = &sc7180_headset_dev,
> + .num_aux_devs = 1,
> + .dapm_widgets = sc7180_snd_widgets,
> + .num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets),
> +};
> +
> +static int sc7180_parse_aux_of(struct device *dev)
> +{
> + sc7180_headset_dev.dlc.of_node = of_parse_phandle(
> + dev->of_node, "aux-dev", 0);
> +
> + if (!sc7180_headset_dev.dlc.of_node)
> + return -EINVAL;
> + return 0;
> +}
> +
> +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_ops;
> +}
> +
> +static int sc7180_snd_platform_probe(struct platform_device *pdev)
> +{
> + struct snd_soc_card *card = &sc7180_card;
> + struct sc7180_snd_data *data;
> + struct device *dev = &pdev->dev;
> + int ret;
> +
> + /* Allocate the private data */
> + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
> + if (!data)
> + return -ENOMEM;
> +
> + card->dev = dev;
> +
> + ret = qcom_snd_parse_of(card);
> + if (ret) {
> + dev_err(dev, "Error parsing OF data\n");
> + return ret;
> + }
> +
> + snd_soc_card_set_drvdata(card, data);
> +
> + sc7180_add_ops(card);
> +
> + ret = sc7180_parse_aux_of(dev);
> + if (ret) {
> + dev_err(dev, "Failed to parse OF for jack device\n");
> + return ret;
> + }
> +
> + return devm_snd_soc_register_card(dev, card);
> +}
> +
> +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,
> + .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");
> --
> 2.28.0.297.g1956fa8f8d-goog
>
Hi Mark,
Since the LPASS driver has been merged, this driver is ready to go.
I noticed that there is a relevant patch by Stephan recently changing
how aud-dev is read from dts.
https://patchwork.kernel.org/patch/11737783/
If you plan to merge that one first, I can make changes based on that
so the aux-dev can get its init function.
And FYI, there will be a follow-up patch on this machine driver for
users to select between two different sound cards.
The new sound card will pick up a GPIO from dts to toggle front mic / rear mic.
Please let me know if you have any concerns.
Thanks!
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