[2/2] ASoC: qcom: sc7180: Add machine driver for sound card registration
diff mbox series

Message ID 20200717120207.3471030-2-cychiang@chromium.org
State New
Headers show
Series
  • [1/2] ASoC: qcom: dt-bindings: Add sc7180 machine bindings
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Commit Message

Cheng-yi Chiang July 17, 2020, 12:02 p.m. UTC
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>
---
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@chromium.org>
 Rohit kumar <rohitkr@codeaurora.org>
 Ajit Pandey <ajitp@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

Comments

Tzung-Bi Shih July 20, 2020, 2:46 a.m. UTC | #1
On Fri, Jul 17, 2020 at 8:02 PM Cheng-Yi Chiang <cychiang@chromium.org> wrote:
> 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
> + */
Use "//" for all lines (see https://lkml.org/lkml/2020/5/14/332).

> +#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"
Insert a blank line in between <...> and "..." and sort the list
alphabetically to make it less likely to conflict.

> +static int sc7180_snd_hw_params(struct snd_pcm_substream *substream,
> +                               struct snd_pcm_hw_params *params)
> +{
Dummy function?  Or is it still work in progress?

> +       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);
-EINVAL.

> +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;
This block is something I don't expect to be in "dai_init" (i.e. there
is only 1 headset jack, why do we need to run the code for n times).

> +       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);
-EINVAL.

> +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 the format is fixed, could it put somewhere statically?

> +               if (++data->pri_mi2s_clk_count == 1) {
Don't it need to be atomic?

> +                       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);
-EINVAL.

> +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) {
Atomic?

> +                       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);
-EINVAL.

> +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;
Looks like you don't need to allocate the card in runtime.  Also you
need to use the devm version if needed.

> +       /* Allocate the private data */
> +       data = kzalloc(sizeof(*data), GFP_KERNEL);
Use devm.

> +       card->dapm_widgets = sc7180_snd_widgets;
> +       card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets);
Can the struct snd_soc_card allocate statically?

> +       sc7180_add_ops(card);
> +       ret = snd_soc_register_card(card);
devm.


I didn't dive into the logic too much.  Would need another round
review if any newer version.
Cheng-yi Chiang July 21, 2020, 11:36 a.m. UTC | #2
Hi Tzung-Bi,
Thanks for the review!
On Mon, Jul 20, 2020 at 10:47 AM Tzung-Bi Shih <tzungbi@google.com> wrote:
>
> On Fri, Jul 17, 2020 at 8:02 PM Cheng-Yi Chiang <cychiang@chromium.org> wrote:
> > 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
> > + */
> Use "//" for all lines (see https://lkml.org/lkml/2020/5/14/332).
>

Thanks for the pointer. Fixed in v2.

> > +#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"
> Insert a blank line in between <...> and "..." and sort the list
> alphabetically to make it less likely to conflict.

Fixed in v2.

>
> > +static int sc7180_snd_hw_params(struct snd_pcm_substream *substream,
> > +                               struct snd_pcm_hw_params *params)
> > +{
> Dummy function?  Or is it still work in progress?
>
Removed in v2.

> > +       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);
> -EINVAL.
>
Removed in v2.
> > +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;
> This block is something I don't expect to be in "dai_init" (i.e. there
> is only 1 headset jack, why do we need to run the code for n times).
>
Thanks for the suggestion. In v2 I am using aux device so this
function is cleaned up to be specific to aux device for jack
detection.

> > +       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);
> -EINVAL.
>
Removed in v2.
> > +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 the format is fixed, could it put somewhere statically?
>
Fixed in v2.
> > +               if (++data->pri_mi2s_clk_count == 1) {
> Don't it need to be atomic?
>
soc_pcm_open and soc_pcm_close are protected by card->pcm_mutex so
they will happen in sequence.

> > +                       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);
> -EINVAL.
Fixed in v2
>
> > +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) {
> Atomic?
ditto
>
> > +                       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);
> -EINVAL.
>
not needed since this returns void
> > +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;
> Looks like you don't need to allocate the card in runtime.  Also you
> need to use the devm version if needed.
>
Thanks for the great suggestion. In v2 I am using a static sound card.
Also, use devm wherever possible to greatly simplify the code.

> > +       /* Allocate the private data */
> > +       data = kzalloc(sizeof(*data), GFP_KERNEL);
> Use devm.
>
Fixed in v2.
> > +       card->dapm_widgets = sc7180_snd_widgets;
> > +       card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets);
> Can the struct snd_soc_card allocate statically?
>
Fixed in v2.
> > +       sc7180_add_ops(card);
> > +       ret = snd_soc_register_card(card);
> devm.
>
>
> I didn't dive into the logic too much.  Would need another round
> review if any newer version.

Thanks again.

Patch
diff mbox series

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");