Re: [PATCH v11 3/3] ASoC: qcom: sc7180: Add machine driver for sound card registration

[Cheng-yi Chiang <cychiang@chromium.org>]

On Mon, Sep 14, 2020 at 4:06 PM Cheng-Yi Chiang <cychiang@chromium.org> wrote:
>
> From: Ajit Pandey <ajitp@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@codeaurora.org>
> Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
> ---
>  sound/soc/qcom/Kconfig  |  12 ++
>  sound/soc/qcom/Makefile |   2 +
>  sound/soc/qcom/sc7180.c | 266 ++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 280 insertions(+)
>  create mode 100644 sound/soc/qcom/sc7180.c
>
> diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
> index a607ace8b089..0459185ee243 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 I2C
> +       select SND_SOC_QCOM_COMMON
> +       select SND_SOC_LPASS_SC7180
> +       select SND_SOC_MAX98357A
> +       select SND_SOC_RT5682_I2C
> +       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..0e90448523b0
> --- /dev/null
> +++ b/sound/soc/qcom/sc7180.c
> @@ -0,0 +1,266 @@
> +// 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/soc.h>
> +#include <uapi/linux/input-event-codes.h>
> +
> +#include "../codecs/rt5682.h"
> +#include "common.h"
> +#include "lpass.h"
> +
> +#define DEFAULT_MCLK_RATE              19200000
> +#define RT5682_PLL1_FREQ (48000 * 512)
> +
> +// This will be defined in include/dt-bindings/sound/sc7180-lpass.h
> +#define LPASS_DP_RX 2
> +
> +struct sc7180_snd_data {
> +       struct snd_soc_card card;
> +       u32 pri_mi2s_clk_count;
> +       struct snd_soc_jack hs_jack;
> +       struct snd_soc_jack hdmi_jack;
> +};
> +
> +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_pcm_runtime *rtd)
> +{
> +       struct snd_soc_card *card = rtd->card;
> +       struct sc7180_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, "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->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 = sc7180_jack_free;
> +
> +       return snd_soc_component_set_jack(component, &pdata->hs_jack, NULL);
> +}
> +
> +static int sc7180_hdmi_init(struct snd_soc_pcm_runtime *rtd)
> +{
> +       struct snd_soc_card *card = rtd->card;
> +       struct sc7180_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);
> +
> +       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 = sc7180_jack_free;
> +
> +       return snd_soc_component_set_jack(component, &pdata->hdmi_jack, NULL);
> +}
> +
> +static int sc7180_init(struct snd_soc_pcm_runtime *rtd)
> +{
> +       struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
> +
> +       switch (cpu_dai->id) {
> +       case MI2S_PRIMARY:
> +               return sc7180_headset_init(rtd);
> +       case MI2S_SECONDARY:
> +               return 0;
> +       case LPASS_DP_RX:
> +               return sc7180_hdmi_init(rtd);
> +       default:
> +               dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
> +                       cpu_dai->id);
> +               return -EINVAL;
> +       }
> +       return 0;
> +}
> +
> +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;
> +       case LPASS_DP_RX:
> +               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;
> +       case LPASS_DP_RX:
> +               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 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;
> +               link->init = sc7180_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;
> +
> +       /* Allocate the private data */
> +       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->dev = dev;
> +       card->dapm_widgets = sc7180_snd_widgets;
> +       card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets);
> +
> +       ret = qcom_snd_parse_of(card);
> +       if (ret)
> +               return ret;
> +
> +       sc7180_add_ops(card);
> +
> +       return devm_snd_soc_register_card(dev, card);
> +}
> +
> +static const struct of_device_id sc7180_snd_device_id[]  = {
> +       { .compatible = "qcom,sc7180-sndcard-rt5682-m98357-1mic" },
> +       {},
> +};
> +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");
> --
> 2.28.0.618.gf4bc123cb7-goog
>

Hi Srini and Stephan,
May I get your Reviewed-By for this patch ?
There are some patches on the machine driver for different
configurations pending on this one so I would hope to get this one
merged first.

Thanks a lot for reviewing it!