ASoC: qcom: add machine driver for sc8280xp

Add machine driver for sc8280xp SoC.

This intial supports only includes WSA883x Speakers and WCD938x based headset.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220916132427.1845-6-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/qcom/Kconfig

@@ -173,6 +173,18 @@ config SND_SOC_SM8250
 	  SM8250 SoC-based systems.
 	  Say Y if you want to use audio device on this SoCs.
 
+config SND_SOC_SC8280XP
+	tristate "SoC Machine driver for SC8280XP boards"
+	depends on QCOM_APR || COMPILE_TEST
+	depends on SOUNDWIRE
+	depends on COMMON_CLK
+	select SND_SOC_QDSP6
+	select SND_SOC_QCOM_COMMON
+	help
+	  To add support for audio on Qualcomm Technologies Inc.
+	  SC8280XP 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 && GPIOLIB

sound/soc/qcom/Makefile

@@ -26,6 +26,7 @@ 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-sc8280xp-objs := sc8280xp.o
 snd-soc-qcom-common-objs := common.o
 
 obj-$(CONFIG_SND_SOC_STORM) += snd-soc-storm.o
@@ -33,6 +34,7 @@ obj-$(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_SC8280XP) += snd-soc-sc8280xp.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

sound/soc/qcom/sc8280xp.c

@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2022, Linaro Limited
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/pcm.h>
+#include <linux/soundwire/sdw.h>
+#include <sound/jack.h>
+#include <linux/input-event-codes.h>
+#include "qdsp6/q6afe.h"
+#include "common.h"
+
+#define DRIVER_NAME		"sc8280xp"
+
+struct sc8280xp_snd_data {
+	bool stream_prepared[AFE_PORT_MAX];
+	struct snd_soc_card *card;
+	struct sdw_stream_runtime *sruntime[AFE_PORT_MAX];
+	struct snd_soc_jack jack;
+	bool jack_setup;
+};
+
+static int sc8280xp_snd_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct sc8280xp_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+
+	return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
+}
+
+static int sc8280xp_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				     struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+	struct snd_interval *rate = hw_param_interval(params,
+					SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval *channels = hw_param_interval(params,
+					SNDRV_PCM_HW_PARAM_CHANNELS);
+
+	rate->min = rate->max = 48000;
+	channels->min = 2;
+	channels->max = 2;
+	switch (cpu_dai->id) {
+	case TX_CODEC_DMA_TX_0:
+	case TX_CODEC_DMA_TX_1:
+	case TX_CODEC_DMA_TX_2:
+	case TX_CODEC_DMA_TX_3:
+		channels->min = 1;
+		break;
+	default:
+		break;
+	}
+
+
+	return 0;
+}
+
+static int sc8280xp_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);
+	struct sc8280xp_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card);
+
+	return qcom_snd_sdw_hw_params(substream, params, &pdata->sruntime[cpu_dai->id]);
+}
+
+static int sc8280xp_snd_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+	struct sc8280xp_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
+
+	return qcom_snd_sdw_prepare(substream, sruntime,
+				    &data->stream_prepared[cpu_dai->id]);
+}
+
+static int sc8280xp_snd_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct sc8280xp_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
+
+	return qcom_snd_sdw_hw_free(substream, sruntime,
+				    &data->stream_prepared[cpu_dai->id]);
+}
+
+static const struct snd_soc_ops sc8280xp_be_ops = {
+	.hw_params = sc8280xp_snd_hw_params,
+	.hw_free = sc8280xp_snd_hw_free,
+	.prepare = sc8280xp_snd_prepare,
+};
+
+static void sc8280xp_add_be_ops(struct snd_soc_card *card)
+{
+	struct snd_soc_dai_link *link;
+	int i;
+
+	for_each_card_prelinks(card, i, link) {
+		if (link->no_pcm == 1) {
+			link->init = sc8280xp_snd_init;
+			link->be_hw_params_fixup = sc8280xp_be_hw_params_fixup;
+			link->ops = &sc8280xp_be_ops;
+		}
+	}
+}
+
+static int sc8280xp_platform_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card;
+	struct sc8280xp_snd_data *data;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+	card->owner = THIS_MODULE;
+	/* Allocate the private data */
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	card->dev = dev;
+	dev_set_drvdata(dev, card);
+	snd_soc_card_set_drvdata(card, data);
+	ret = qcom_snd_parse_of(card);
+	if (ret)
+		return ret;
+
+	card->driver_name = DRIVER_NAME;
+	sc8280xp_add_be_ops(card);
+	return devm_snd_soc_register_card(dev, card);
+}
+
+static const struct of_device_id snd_sc8280xp_dt_match[] = {
+	{.compatible = "qcom,sc8280xp-sndcard",},
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, snd_sc8280xp_dt_match);
+
+static struct platform_driver snd_sc8280xp_driver = {
+	.probe  = sc8280xp_platform_probe,
+	.driver = {
+		.name = "snd-sc8280xp",
+		.of_match_table = snd_sc8280xp_dt_match,
+	},
+};
+module_platform_driver(snd_sc8280xp_driver);
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
+MODULE_DESCRIPTION("SC8280XP ASoC Machine Driver");
+MODULE_LICENSE("GPL v2");