[PATCH v6 0/2] Machine driver to support LPASS SC7280 sound card registration

[PATCH v6 0/2] Machine driver to support LPASS SC7280 sound card registration

[Srinivasa Rao Mandadapu]

This patch set is to add support for SC7280 sound card registration and
to add dt-bindings documentation file.

Srinivasa Rao Mandadapu (2):
  ASoC: google: dt-bindings: Add sc7280-herobrine machine bindings
  ASoC: qcom: SC7280: Add machine driver

Changes Since V5:
    -- Add required properties to dt-bindings
Changes Since V4:
    -- Add COMPILE_TEST flag in sc7280 configuration.
    -- Remove redundant startup and shutdown callbacks of snd_soc_ops.
    -- Fix typo errors.
Changes Since V3:
    -- Change audio jack playpause key value.
Changes Since V2:
    -- updated required field in bindings
    -- updated Return type check with proper enum in sc7280.c
    -- Updated Header name and Typos in sc7280.c
Changes Since V1:
    -- Indentation changes and typo.

 .../bindings/sound/google,sc7280-herobrine.yaml    | 171 ++++++++++++
 sound/soc/qcom/Kconfig                             |  12 +
 sound/soc/qcom/Makefile                            |   2 +
 sound/soc/qcom/sc7280.c                            | 299 +++++++++++++++++++++
 4 files changed, 484 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
 create mode 100644 sound/soc/qcom/sc7280.c

-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.

[PATCH v6 1/2] ASoC: google: dt-bindings: Add sc7280-herobrine machine bindings

[Srinivasa Rao Mandadapu]

Add devicetree bindings documentation file for sc7280 sound card
registration.

Signed-off-by: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
---
 .../bindings/sound/google,sc7280-herobrine.yaml    | 171 +++++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml

diff --git a/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml b/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
new file mode 100644
index 0000000..d1687b9
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
@@ -0,0 +1,171 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/google,sc7280-herobrine.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google SC7280-Herobrine ASoC sound card driver
+
+maintainers:
+  - Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
+  - Judy Hsiao <judyhsiao@chromium.org>
+
+description:
+  This binding describes the SC7280 sound card which uses LPASS for audio.
+
+properties:
+  compatible:
+    enum:
+      - google,sc7280-herobrine
+
+  audio-routing:
+    $ref: /schemas/types.yaml#/definitions/non-unique-string-array
+    description:
+      A list of the connections between audio components. Each entry is a
+      pair of strings, the first being the connection's sink, the second
+      being the connection's source.
+
+  model:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: User specified audio sound card name
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^dai-link@[0-9a-f]$":
+    description:
+      Each subnode represents a dai link. Subnodes of each dai links would be
+      cpu/codec dais.
+
+    type: object
+
+    properties:
+      link-name:
+        description: Indicates dai-link name and PCM stream name.
+        $ref: /schemas/types.yaml#/definitions/string
+        maxItems: 1
+
+      reg:
+        maxItems: 1
+        description: dai link address.
+
+      cpu:
+        description: Holds subnode which indicates cpu dai.
+        type: object
+        properties:
+          sound-dai: true
+
+      codec:
+        description: Holds subnode which indicates codec dai.
+        type: object
+        properties:
+          sound-dai: true
+
+    required:
+      - link-name
+      - cpu
+      - codec
+      - reg
+      - sound-dai
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - model
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+
+  - |
+    #include <dt-bindings/sound/qcom,lpass.h>
+    sound {
+        compatible = "google,sc7280-herobrine";
+        model = "sc7280-wcd938x-max98360a-4dmic";
+
+        audio-routing =
+            "IN1_HPHL", "HPHL_OUT",
+            "IN2_HPHR", "HPHR_OUT",
+            "AMIC1", "MIC BIAS1",
+            "AMIC2", "MIC BIAS2",
+            "VA DMIC0", "MIC BIAS3",
+            "VA DMIC1", "MIC BIAS3",
+            "VA DMIC2", "MIC BIAS4",
+            "VA DMIC3", "MIC BIAS4",
+            "TX SWR_ADC0", "ADC1_OUTPUT",
+            "TX SWR_ADC1", "ADC2_OUTPUT",
+            "TX SWR_ADC2", "ADC3_OUTPUT",
+            "TX SWR_DMIC0", "DMIC1_OUTPUT",
+            "TX SWR_DMIC1", "DMIC2_OUTPUT",
+            "TX SWR_DMIC2", "DMIC3_OUTPUT",
+            "TX SWR_DMIC3", "DMIC4_OUTPUT";
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        dai-link@0 {
+            link-name = "WCD Playback";
+            reg = <LPASS_CDC_DMA_RX0>;
+            cpu {
+                sound-dai = <&lpass_cpu LPASS_CDC_DMA_RX0>;
+            };
+
+            codec {
+                sound-dai = <&wcd938x 0>, <&swr0 0>, <&rxmacro 0>;
+            };
+        };
+        dai-link@1 {
+            link-name = "WCD Capture";
+            reg = <LPASS_CDC_DMA_TX3>;
+            cpu {
+                sound-dai = <&lpass_cpu LPASS_CDC_DMA_TX3>;
+            };
+
+            codec {
+                sound-dai = <&wcd938x 1>, <&swr1 0>, <&txmacro 0>;
+            };
+        };
+
+        dai-link@2 {
+            link-name = "MI2S Playback";
+            reg = <MI2S_SECONDARY>;
+            cpu {
+                sound-dai = <&lpass_cpu MI2S_SECONDARY>;
+            };
+
+            codec {
+                sound-dai = <&max98360a>;
+            };
+        };
+
+        dai-link@3 {
+            link-name = "DMIC Capture";
+            reg = <LPASS_CDC_DMA_VA_TX0>;
+            cpu {
+                sound-dai = <&lpass_cpu LPASS_CDC_DMA_VA_TX0>;
+            };
+
+            codec {
+                sound-dai = <&vamacro 0>;
+            };
+        };
+
+        dai-link@5 {
+            link-name = "DP Playback";
+            reg = <LPASS_DP_RX>;
+            cpu {
+                sound-dai = <&lpass_cpu LPASS_DP_RX>;
+            };
+
+            codec {
+                sound-dai = <&mdss_dp>;
+            };
+        };
+    };
-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.

Re: [PATCH v6 1/2] ASoC: google: dt-bindings: Add sc7280-herobrine machine bindings

[Rob Herring]

On Thu, 18 Nov 2021 18:15:05 +0530, Srinivasa Rao Mandadapu wrote:
> Add devicetree bindings documentation file for sc7280 sound card
> registration.
> 
> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
> ---
>  .../bindings/sound/google,sc7280-herobrine.yaml    | 171 +++++++++++++++++++++
>  1 file changed, 171 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@0: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@1: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@2: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@3: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@5: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1556613

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.

Re: [PATCH v6 1/2] ASoC: google: dt-bindings: Add sc7280-herobrine machine bindings

[Rob Herring]

On Thu, 18 Nov 2021 18:15:05 +0530, Srinivasa Rao Mandadapu wrote:
> Add devicetree bindings documentation file for sc7280 sound card
> registration.
> 
> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
> ---
>  .../bindings/sound/google,sc7280-herobrine.yaml    | 171 +++++++++++++++++++++
>  1 file changed, 171 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@0: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@1: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@2: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@3: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.example.dt.yaml: sound: dai-link@5: 'sound-dai' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/google,sc7280-herobrine.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1556613

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.

[PATCH v6 2/2] ASoC: qcom: SC7280: Add machine driver

[Srinivasa Rao Mandadapu]

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
+	help
+	  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>
+#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>
+
+#include "../codecs/wcd938x.h"
+#include "common.h"
+#include "lpass.h"
+
+#define LPASS_MAX_PORTS  (LPASS_CDC_DMA_VA_TX8 + 1)
+
+struct sc7280_snd_data {
+	bool stream_prepared[LPASS_MAX_PORTS];
+	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);
+
+	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");
-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.

Re: [PATCH v6 2/2] ASoC: qcom: SC7280: Add machine driver

[Srinivas Kandagatla]

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
> 

Re: [PATCH v6 2/2] ASoC: qcom: SC7280: Add machine driver

[Srinivasa Rao Mandadapu]

On 12/1/2021 10:03 PM, Srinivas Kandagatla wrote:
Thanks for Your time Srini!!!
>
> 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"
>
Okay.. Will do accordingly.
>
>> +      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?
Will remove it.
>
>> +#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?
>
Okay. Will remove it.
>> +
>> +#include "../codecs/wcd938x.h"
>
> Why do we need the codec header file here?
Okay. will replace with #include <linux/soundwire/sdw.h> for sound wire 
stream init functions.
>
>> +#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.
Okay. Will change accordingly.
>
>> +
>> +struct sc7280_snd_data {
>> +    bool stream_prepared[LPASS_MAX_PORTS];
> move this to the end of struct.
Okay.
>
>> +    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
Okay.
>
>> +
>> +    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.
Okay.
>
> --srini
>>
-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.

Re: [PATCH v6 2/2] ASoC: qcom: SC7280: Add machine driver

[Srinivasa Rao Mandadapu]

On 12/1/2021 10:03 PM, Srinivas Kandagatla wrote:
Thanks for Your time Srini!!!
>
> 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"
>
Okay.. Will do accordingly.
>
>> +      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?
Will remove it.
>
>> +#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?
>
Okay. Will remove it.
>> +
>> +#include "../codecs/wcd938x.h"
>
> Why do we need the codec header file here?
Okay. will replace with #include <linux/soundwire/sdw.h> for sound wire 
stream init functions.
>
>> +#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.
Okay. Will change accordingly.
>
>> +
>> +struct sc7280_snd_data {
>> +    bool stream_prepared[LPASS_MAX_PORTS];
> move this to the end of struct.
Okay.
>
>> +    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
Okay.
>
>> +
>> +    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.
Okay.
>
> --srini
>>
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