ASoC: qcom: Add x1e80100 sound machine driver

Add sound machine driver for the soundcards on Qualcomm X1E80100 SoC,
supporting up to four channel audio playback over Soundwire bus.  The
driver is based on existing sc8280xp.c driver.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://msgid.link/r/20231204100116.211898-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/qcom/Kconfig

@@ -221,4 +221,16 @@ config SND_SOC_SC7280
 	  SC7280 SoC-based systems.
 	  Say Y or M if you want to use audio device on this SoCs.
 
+config SND_SOC_X1E80100
+	tristate "SoC Machine driver for X1E80100 boards"
+	depends on QCOM_APR && SOUNDWIRE
+	depends on COMMON_CLK
+	select SND_SOC_QDSP6
+	select SND_SOC_QCOM_COMMON
+	select SND_SOC_QCOM_SDW
+	help
+	  Add support for audio on Qualcomm Technologies Inc.
+	  X1E80100 SoC-based systems.
+	  Say Y or M if you want to use audio device on this SoCs.
+
 endif #SND_SOC_QCOM

sound/soc/qcom/Makefile

@@ -29,6 +29,7 @@ snd-soc-sm8250-objs := sm8250.o
 snd-soc-sc8280xp-objs := sc8280xp.o
 snd-soc-qcom-common-objs := common.o
 snd-soc-qcom-sdw-objs := sdw.o
+snd-soc-x1e80100-objs := x1e80100.o
 
 obj-$(CONFIG_SND_SOC_STORM) += snd-soc-storm.o
 obj-$(CONFIG_SND_SOC_APQ8016_SBC) += snd-soc-apq8016-sbc.o
@@ -40,6 +41,7 @@ obj-$(CONFIG_SND_SOC_SDM845) += snd-soc-sdm845.o
 obj-$(CONFIG_SND_SOC_SM8250) += snd-soc-sm8250.o
 obj-$(CONFIG_SND_SOC_QCOM_COMMON) += snd-soc-qcom-common.o
 obj-$(CONFIG_SND_SOC_QCOM_SDW) += snd-soc-qcom-sdw.o
+obj-$(CONFIG_SND_SOC_X1E80100) += snd-soc-x1e80100.o
 
 #DSP lib
 obj-$(CONFIG_SND_SOC_QDSP6) += qdsp6/

sound/soc/qcom/x1e80100.c

+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2023, Linaro Limited
+
+#include <dt-bindings/sound/qcom,q6afe.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/soundwire/sdw.h>
+#include <sound/pcm.h>
+#include <sound/jack.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include "common.h"
+#include "qdsp6/q6afe.h"
+#include "sdw.h"
+
+struct x1e80100_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 x1e80100_snd_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct x1e80100_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+
+	return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
+}
+
+static void x1e80100_snd_shutdown(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
+	struct x1e80100_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
+
+	data->sruntime[cpu_dai->id] = NULL;
+	sdw_release_stream(sruntime);
+}
+
+static int x1e80100_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				     struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_dai *cpu_dai = snd_soc_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;
+	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 x1e80100_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 = snd_soc_rtd_to_cpu(rtd, 0);
+	struct x1e80100_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+
+	return qcom_snd_sdw_hw_params(substream, params, &data->sruntime[cpu_dai->id]);
+}
+
+static int x1e80100_snd_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
+	struct x1e80100_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 x1e80100_snd_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct x1e80100_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct snd_soc_dai *cpu_dai = snd_soc_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 x1e80100_be_ops = {
+	.startup = qcom_snd_sdw_startup,
+	.shutdown = x1e80100_snd_shutdown,
+	.hw_params = x1e80100_snd_hw_params,
+	.hw_free = x1e80100_snd_hw_free,
+	.prepare = x1e80100_snd_prepare,
+};
+
+static void x1e80100_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 = x1e80100_snd_init;
+			link->be_hw_params_fixup = x1e80100_be_hw_params_fixup;
+			link->ops = &x1e80100_be_ops;
+		}
+	}
+}
+
+static int x1e80100_platform_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card;
+	struct x1e80100_snd_data *data;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+	/* Allocate the private data */
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	card->owner = THIS_MODULE;
+	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 = "x1e80100";
+	x1e80100_add_be_ops(card);
+
+	return devm_snd_soc_register_card(dev, card);
+}
+
+static const struct of_device_id snd_x1e80100_dt_match[] = {
+	{ .compatible = "qcom,x1e80100-sndcard", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, snd_x1e80100_dt_match);
+
+static struct platform_driver snd_x1e80100_driver = {
+	.probe  = x1e80100_platform_probe,
+	.driver = {
+		.name = "snd-x1e80100",
+		.of_match_table = snd_x1e80100_dt_match,
+	},
+};
+module_platform_driver(snd_x1e80100_driver);
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
+MODULE_AUTHOR("Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>");
+MODULE_DESCRIPTION("Qualcomm X1E80100 ASoC Machine Driver");
+MODULE_LICENSE("GPL");