[PATCH v2 2/2] ASoC: qcom: add sdm845 sound card support

Rohit kumar
2018-06-21T10:54:01Z

This patch adds sdm845 audio machine driver support.

Signed-off-by: Rohit kumar <rohitkr@codeaurora.org>
---
sound/soc/qcom/Kconfig | 9 +
sound/soc/qcom/Makefile | 2 +
sound/soc/qcom/sdm845.c | 514 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 525 insertions(+)
create mode 100644 sound/soc/qcom/sdm845.c

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 87838fa..09de50d 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -90,3 +90,12 @@ config SND_SOC_MSM8996
Support for Qualcomm Technologies LPASS audio block in
APQ8096 SoC-based systems.
Say Y if you want to use audio device on this SoCs
+
+config SND_SOC_SDM845
+ tristate "SoC Machine driver for SDM845 boards"
+ depends on QCOM_APR
+ select SND_SOC_QDSP6
+ help
+ To add support for audio on Qualcomm Technologies Inc.
+ SDM845 SoC-based systems.
+ Say Y if you want to use audio device on this SoCs
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 206945b..07f097a 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -14,10 +14,12 @@ obj-$(CONFIG_SND_SOC_LPASS_APQ8016) += snd-soc-lpass-apq8016.o
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

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

#DSP lib
obj-$(CONFIG_SND_SOC_QDSP6) += qdsp6/
diff --git a/sound/soc/qcom/sdm845.c b/sound/soc/qcom/sdm845.c
new file mode 100644
index 0000000..531af82
--- /dev/null
+++ b/sound/soc/qcom/sdm845.c
@@ -0,0 +1,514 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/component.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/atomic.h>
+#include <linux/of_device.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <linux/soc/qcom/apr.h>
+#include "qdsp6/q6afe.h"
+
+#define DEFAULT_SAMPLE_RATE_48K 48000
+#define DEFAULT_MCLK_RATE 24576000
+#define DEFAULT_BCLK_RATE 1536000
+
+struct sdm845_snd_data {
+ struct snd_soc_card *card;
+ struct regulator *vdd_supply;
+ uint32_t pri_mi2s_clk_count;
+ uint32_t quat_tdm_clk_count;
+ struct snd_soc_dai_link dai_link[];
+};
+
+
+static unsigned int tdm_slot_offset[8] = {0, 4, 8, 12, 16, 20, 24, 28};
+
+static int sdm845_tdm_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 = rtd->cpu_dai;
+ int ret = 0;
+ int channels, slot_width;
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S32_LE:
+ case SNDRV_PCM_FORMAT_S24_LE:
+ case SNDRV_PCM_FORMAT_S16_LE:
+ slot_width = 32;
+ break;
+ default:
+ dev_err(rtd->dev, "%s: invalid param format 0x%x\n",
+ __func__, params_format(params));
+ return -EINVAL;
+ }
+
+ channels = params_channels(params);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0x3,
+ channels, slot_width);
+ if (ret < 0) {
+ dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
+ __func__, ret);
+ goto end;
+ }
+
+ ret = snd_soc_dai_set_channel_map(cpu_dai, 0, NULL,
+ channels, tdm_slot_offset);
+ if (ret < 0) {
+ dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
+ __func__, ret);
+ goto end;
+ }
+ } else {
+ ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0xf, 0,
+ channels, slot_width);
+ if (ret < 0) {
+ dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
+ __func__, ret);
+ goto end;
+ }
+
+ ret = snd_soc_dai_set_channel_map(cpu_dai, channels,
+ tdm_slot_offset, 0, NULL);
+ if (ret < 0) {
+ dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
+ __func__, ret);
+ goto end;
+ }
+ }
+end:
+ return ret;
+}
+
+static int sdm845_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 = rtd->cpu_dai;
+ int ret = 0;
+
+ switch (cpu_dai->id) {
+ case QUATERNARY_TDM_RX_0:
+ case QUATERNARY_TDM_TX_0:
+ ret = sdm845_tdm_snd_hw_params(substream, params);
+ break;
+ default:
+ pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+ break;
+ }
+ return ret;
+}
+
+static int sdm845_snd_startup(struct snd_pcm_substream *substream)
+{
+ unsigned int fmt = SND_SOC_DAIFMT_CBS_CFS;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_card *card = rtd->card;
+ struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+ switch (cpu_dai->id) {
+ case PRIMARY_MI2S_RX:
+ case PRIMARY_MI2S_TX:
+ if (++(data->pri_mi2s_clk_count) == 1) {
+ snd_soc_dai_set_sysclk(cpu_dai,
+ Q6AFE_LPASS_CLK_ID_MCLK_1,
+ DEFAULT_MCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+ snd_soc_dai_set_sysclk(cpu_dai,
+ Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
+ DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+ }
+ snd_soc_dai_set_fmt(cpu_dai, fmt);
+ break;
+
+ case QUATERNARY_TDM_RX_0:
+ case QUATERNARY_TDM_TX_0:
+ if (++(data->quat_tdm_clk_count) == 1) {
+ snd_soc_dai_set_sysclk(cpu_dai,
+ Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
+ DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+ }
+ break;
+
+ default:
+ pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+ break;
+ }
+ return 0;
+}
+
+static void sdm845_snd_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_card *card = rtd->card;
+ struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+ switch (cpu_dai->id) {
+ case PRIMARY_MI2S_RX:
+ case PRIMARY_MI2S_TX:
+ if (--(data->pri_mi2s_clk_count) == 0) {
+ snd_soc_dai_set_sysclk(cpu_dai,
+ Q6AFE_LPASS_CLK_ID_MCLK_1,
+ 0, SNDRV_PCM_STREAM_PLAYBACK);
+ snd_soc_dai_set_sysclk(cpu_dai,
+ Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
+ 0, SNDRV_PCM_STREAM_PLAYBACK);
+ };
+ break;
+
+ case QUATERNARY_TDM_RX_0:
+ case QUATERNARY_TDM_TX_0:
+ if (--(data->quat_tdm_clk_count) == 0) {
+ snd_soc_dai_set_sysclk(cpu_dai,
+ Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
+ 0, SNDRV_PCM_STREAM_PLAYBACK);
+ }
+ break;
+
+ default:
+ pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+ break;
+ }
+}
+
+static struct snd_soc_ops sdm845_be_ops = {
+ .hw_params = sdm845_snd_hw_params,
+ .startup = sdm845_snd_startup,
+ .shutdown = sdm845_snd_shutdown,
+};
+
+static int sdm845_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 = DEFAULT_SAMPLE_RATE_48K;
+ channels->min = channels->max = 2;
+
+ return 0;
+}
+
+static struct sdm845_snd_data *sdm845_sbc_parse_of(struct snd_soc_card *card)
+{
+ struct device *dev = card->dev;
+ struct snd_soc_dai_link *link;
+ struct device_node *np, *codec, *platform, *cpu, *node;
+ int ret, num_links;
+ struct sdm845_snd_data *data;
+
+ ret = snd_soc_of_parse_card_name(card, "qcom,model");
+ if (ret) {
+ dev_err(dev, "Error parsing card name: %d\n", ret);
+ return ERR_PTR(ret);
+ }
+
+ node = dev->of_node;
+
+ /* DAPM routes */
+ if (of_property_read_bool(node, "qcom,audio-routing")) {
+ ret = snd_soc_of_parse_audio_routing(card,
+ "qcom,audio-routing");
+ if (ret)
+ return ERR_PTR(ret);
+ }
+
+ /* Populate links */
+ num_links = of_get_child_count(node);
+
+ /* Allocate the private data and the DAI link array */
+ data = kzalloc(sizeof(*data) + sizeof(*link) * num_links,
+ GFP_KERNEL);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+
+ card->dai_link = &data->dai_link[0];
+ card->num_links = num_links;
+
+ link = data->dai_link;
+ data->card = card;
+
+ for_each_child_of_node(node, np) {
+ cpu = of_get_child_by_name(np, "cpu");
+ if (!cpu) {
+ dev_err(dev, "Can't find cpu DT node\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
+ if (!link->cpu_of_node) {
+ dev_err(card->dev, "error getting cpu phandle\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
+ if (ret) {
+ dev_err(card->dev, "error getting cpu dai name\n");
+ goto fail;
+ }
+
+ platform = of_get_child_by_name(np, "platform");
+ codec = of_get_child_by_name(np, "codec");
+ if (codec && platform) {
+ link->platform_of_node = of_parse_phandle(platform,
+ "sound-dai", 0);
+ if (!link->platform_of_node) {
+ dev_err(card->dev, "error getting platform phandle\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
+ if (ret < 0) {
+ dev_err(card->dev, "error getting codec dai name\n");
+ goto fail;
+ }
+ link->no_pcm = 1;
+ link->ignore_pmdown_time = 1;
+ link->ops = &sdm845_be_ops;
+ link->be_hw_params_fixup = sdm845_be_hw_params_fixup;
+ } else {
+ link->platform_of_node = link->cpu_of_node;
+ link->codec_dai_name = "snd-soc-dummy-dai";
+ link->codec_name = "snd-soc-dummy";
+ link->dynamic = 1;
+ }
+
+ link->ignore_suspend = 1;
+ ret = of_property_read_string(np, "link-name", &link->name);
+ if (ret) {
+ dev_err(card->dev,
+ "error getting codec dai_link name\n");
+ goto fail;
+ }
+
+ link->dpcm_playback = 1;
+ link->dpcm_capture = 1;
+ link->stream_name = link->name;
+ link++;
+ }
+ dev_set_drvdata(dev, card);
+ snd_soc_card_set_drvdata(card, data);
+
+ return data;
+fail:
+ kfree(data);
+ return ERR_PTR(ret);
+}
+
+static void sdm845_init_supplies(struct device *dev)
+{
+ struct snd_soc_card *card = dev_get_drvdata(dev);
+ struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+ data->vdd_supply = regulator_get(dev, "cdc-vdd");
+ if (IS_ERR(data->vdd_supply)) {
+ dev_err(dev, "Unable to get regulator supplies\n");
+ data->vdd_supply = NULL;
+ return;
+ }
+
+ if (regulator_enable(data->vdd_supply))
+ dev_err(dev, "Unable to enable vdd supply\n");
+}
+
+static void sdm845_deinit_supplies(struct device *dev)
+{
+ struct snd_soc_card *card = dev_get_drvdata(dev);
+ struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+ if (!data->vdd_supply)
+ return;
+
+ regulator_disable(data->vdd_supply);
+ regulator_put(data->vdd_supply);
+}
+
+static int sdm845_bind(struct device *dev)
+{
+ struct snd_soc_card *card;
+ struct sdm845_snd_data *data;
+ int ret;
+
+ card = kzalloc(sizeof(*card), GFP_KERNEL);
+ if (!card)
+ return -ENOMEM;
+
+ ret = component_bind_all(dev, card);
+ if (ret) {
+ dev_err(dev, "Audio components bind failed: %d\n", ret);
+ goto bind_fail;
+ }
+
+ card->dev = dev;
+ data = sdm845_sbc_parse_of(card);
+ if (IS_ERR_OR_NULL(data)) {
+ dev_err(dev, "Error parsing OF data\n");
+ goto parse_dt_fail;
+ }
+ sdm845_init_supplies(dev);
+
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ dev_err(dev, "Sound card registration failed\n");
+ goto register_card_fail;
+ }
+ return ret;
+
+register_card_fail:
+ sdm845_deinit_supplies(dev);
+ kfree(data);
+parse_dt_fail:
+ component_unbind_all(dev, card);
+bind_fail:
+ kfree(card);
+ return ret;
+}
+
+static void sdm845_unbind(struct device *dev)
+{
+ struct snd_soc_card *card = dev_get_drvdata(dev);
+ struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+ if (data->vdd_supply)
+ regulator_put(data->vdd_supply);
+ component_unbind_all(dev, card);
+ snd_soc_unregister_card(card);
+ kfree(data);
+ kfree(card);
+}
+
+static const struct component_master_ops sdm845_ops = {
+ .bind = sdm845_bind,
+ .unbind = sdm845_unbind,
+};
+
+static int sdm845_runtime_resume(struct device *dev)
+{
+ struct snd_soc_card *card = dev_get_drvdata(dev);
+ struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+ if (!data->vdd_supply) {
+ dev_dbg(dev, "no supplies defined\n");
+ return 0;
+ }
+
+ if (regulator_enable(data->vdd_supply))
+ dev_err(dev, "Enable regulator supply failed\n");
+
+ return 0;
+}
+
+static int sdm845_runtime_suspend(struct device *dev)
+{
+ struct snd_soc_card *card = dev_get_drvdata(dev);
+ struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+ if (!data->vdd_supply) {
+ dev_dbg(dev, "no supplies defined\n");
+ return 0;
+ }
+
+ if (regulator_disable(data->vdd_supply))
+ dev_err(dev, "Disable regulator supply failed\n");
+
+ return 0;
+}
+
+static const struct dev_pm_ops sdm845_pm_ops = {
+ SET_RUNTIME_PM_OPS(sdm845_runtime_suspend,
+ sdm845_runtime_resume, NULL)
+};
+
+static int sdm845_compare_of(struct device *dev, void *data)
+{
+ return dev->of_node == data;
+}
+
+static void sdm845_release_of(struct device *dev, void *data)
+{
+ of_node_put(data);
+}
+
+static int add_audio_components(struct device *dev,
+ struct component_match **matchptr)
+{
+ struct device_node *np, *platform, *cpu, *node, *dai_node;
+
+ node = dev->of_node;
+
+ for_each_child_of_node(node, np) {
+ cpu = of_get_child_by_name(np, "cpu");
+ if (cpu) {
+ dai_node = of_parse_phandle(cpu, "sound-dai", 0);
+ of_node_get(dai_node);
+ component_match_add_release(dev, matchptr,
+ sdm845_release_of,
+ sdm845_compare_of,
+ dai_node);
+ }
+
+ platform = of_get_child_by_name(np, "platform");
+ if (platform) {
+ dai_node = of_parse_phandle(platform, "sound-dai", 0);
+ component_match_add_release(dev, matchptr,
+ sdm845_release_of,
+ sdm845_compare_of,
+ dai_node);
+ }
+ }
+
+ return 0;
+}
+
+static int sdm845_snd_platform_probe(struct platform_device *pdev)
+{
+ struct component_match *match = NULL;
+ int ret;
+
+ ret = add_audio_components(&pdev->dev, &match);
+ if (ret)
+ return ret;
+
+ return component_master_add_with_match(&pdev->dev, &sdm845_ops, match);
+}
+
+static int sdm845_snd_platform_remove(struct platform_device *pdev)
+{
+ component_master_del(&pdev->dev, &sdm845_ops);
+ return 0;
+}
+
+static const struct of_device_id sdm845_snd_device_id[] = {
+ { .compatible = "qcom,sdm845-sndcard" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sdm845_snd_device_id);
+
+static struct platform_driver sdm845_snd_driver = {
+ .probe = sdm845_snd_platform_probe,
+ .remove = sdm845_snd_platform_remove,
+ .driver = {
+ .name = "msm-snd-sdm845",
+ .pm = &sdm845_pm_ops,
+ .owner = THIS_MODULE,
+ .of_match_table = sdm845_snd_device_id,
+ },
+};
+module_platform_driver(sdm845_snd_driver);
+
+MODULE_DESCRIPTION("sdm845 ASoC Machine Driver");
+MODULE_LICENSE("GPL v2");