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: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
sound/soc/qcom/Kconfig | 11 ++
sound/soc/qcom/Makefile | 2 +
sound/soc/qcom/sm8250.c | 228 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 241 insertions(+)
create mode 100644 sound/soc/qcom/sm8250.c
diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 2696ffcba880..484cad31da25 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -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
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 0bd90d74e3db..effa4b3f58fa 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -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
diff --git a/sound/soc/qcom/sm8250.c b/sound/soc/qcom/sm8250.c
new file mode 100644
index 000000000000..7d43de6d909f
--- /dev/null
+++ b/sound/soc/qcom/sm8250.c
@@ -0,0 +1,228 @@
+// 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@xxxxxxxxxx");
+MODULE_DESCRIPTION("SM8250 ASoC Machine Driver");
+MODULE_LICENSE("GPL v2");
--
2.21.0
