Unverified Commit aa2e2785 authored by Srinivas Kandagatla's avatar Srinivas Kandagatla Committed by Mark Brown
Browse files

ASoC: qcom: sm8250: add sound card qrb5165-rb5 support 



Add support to Qualcomm Robotics RB5 Development Kit based on
QRB5165 Robotics SoC. This board has 2 WSA881X smart speakers
with onboard DMIC connected to internal LPASS codec via WSA
and VA macros respectively.

Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20201026170947.10567-3-srinivas.kandagatla@linaro.org


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 765c3759

sound/soc/qcom/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -127,4 +127,15 @@ config SND_SOC_SDM845 
	  SDM845 SoC-based systems.

	  Say Y if you want to use audio device on this SoCs.



config SND_SOC_SM8250

	tristate "SoC Machine driver for SM8250 boards"

	depends on QCOM_APR && SOUNDWIRE

	depends on COMMON_CLK

	select SND_SOC_QDSP6

	select SND_SOC_QCOM_COMMON

	help

	  To add support for audio on Qualcomm Technologies Inc.

	  SM8250 SoC-based systems.

	  Say Y if you want to use audio device on this SoCs.



endif #SND_SOC_QCOM

sound/soc/qcom/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -19,12 +19,14 @@ 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-sm8250-objs := sm8250.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_SM8250) += snd-soc-sm8250.o

obj-$(CONFIG_SND_SOC_QCOM_COMMON) += snd-soc-qcom-common.o



#DSP lib

sound/soc/qcom/sm8250.c

0 → 100644
+228 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

// Copyright (c) 2020, 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 "qdsp6/q6afe.h"

#include "common.h"



#define DRIVER_NAME		"sm8250"

#define MI2S_BCLK_RATE		1536000

#define MAX_SDW_STREAMS		16



struct sm8250_snd_data {

	bool stream_prepared[MAX_SDW_STREAMS];

	struct snd_soc_card *card;

	struct sdw_stream_runtime *sruntime[MAX_SDW_STREAMS];

};



static int sm8250_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,

				     struct snd_pcm_hw_params *params)

{

	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 = channels->max = 2;



	return 0;

}



static int sm8250_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_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);

	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);



	switch (cpu_dai->id) {

	case TERTIARY_MI2S_RX:

		codec_dai_fmt |= SND_SOC_DAIFMT_NB_NF;

		snd_soc_dai_set_sysclk(cpu_dai,

			Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT,

			MI2S_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);

		snd_soc_dai_set_fmt(codec_dai, codec_dai_fmt);

		break;

	default:

		break;

	}

	return 0;

}



static int sm8250_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 *codec_dai;

	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);

	struct sm8250_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card);

	struct sdw_stream_runtime *sruntime;

	int i;



	switch (cpu_dai->id) {

	case WSA_CODEC_DMA_RX_0:

		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 sm8250_snd_wsa_dma_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 sm8250_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;



	/**

	 * NOTE: there is a strict hw requirement about the ordering of port

	 * enables and actual WSA881x PA enable. PA enable should only happen

	 * after soundwire ports are enabled if not DC on the line is

	 * accumulated resulting in Click/Pop Noise

	 * PA enable/mute are handled as part of codec DAPM and digital mute.

	 */



	ret = sdw_enable_stream(sruntime);

	if (ret) {

		sdw_deprepare_stream(sruntime);

		return ret;

	}

	data->stream_prepared[cpu_dai->id]  = true;



	return ret;

}



static int sm8250_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);



	switch (cpu_dai->id) {

	case WSA_CODEC_DMA_RX_0:

	case WSA_CODEC_DMA_RX_1:

		return sm8250_snd_wsa_dma_prepare(substream);

	default:

		break;

	}



	return 0;

}



static int sm8250_snd_hw_free(struct snd_pcm_substream *substream)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct sm8250_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];



	switch (cpu_dai->id) {

	case WSA_CODEC_DMA_RX_0:

	case WSA_CODEC_DMA_RX_1:

		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 sm8250_be_ops = {

	.startup = sm8250_snd_startup,

	.hw_params = sm8250_snd_hw_params,

	.hw_free = sm8250_snd_hw_free,

	.prepare = sm8250_snd_prepare,

};



static void sm8250_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->be_hw_params_fixup = sm8250_be_hw_params_fixup;

			link->ops = &sm8250_be_ops;

		}

	}

}



static int sm8250_platform_probe(struct platform_device *pdev)

{

	struct snd_soc_card *card;

	struct sm8250_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->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;

	sm8250_add_be_ops(card);

	return devm_snd_soc_register_card(dev, card);

}



static const struct of_device_id snd_sm8250_dt_match[] = {

	{.compatible = "qcom,sdm8250"},

	{.compatible = "qcom,qrb5165-rb5"},

	{}

};



MODULE_DEVICE_TABLE(of, snd_sm8250_dt_match);



static struct platform_driver snd_sm8250_driver = {

	.probe  = sm8250_platform_probe,

	.driver = {

		.name = "snd-sm8250",

		.of_match_table = snd_sm8250_dt_match,

	},

};

module_platform_driver(snd_sm8250_driver);

MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");

MODULE_DESCRIPTION("SM8250 ASoC Machine Driver");

MODULE_LICENSE("GPL v2");