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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2020-06-30 17:32:04 +0100
committerVinod Koul <vkoul@kernel.org>2020-07-13 09:45:45 +0530
commit637b623256c1cf5ed83b70b11e218a922b54091b (patch)
tree58c6ee60050bb2523be72b90ec3a2d3f56604e1e
parentc1d5616eadba1ac771b2e2c64d85f8d2a1f1f829 (diff)
downloadkernel-637b623256c1cf5ed83b70b11e218a922b54091b.tar.gz
ASoC: sm8250: add soundcard support
This patch adds basic MI2S playback over LS expansion port on dummy codec. THIS PATCH SHOULD NOT BE UPSTREAMED!!! Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
-rw-r--r--sound/soc/qcom/Kconfig9
-rw-r--r--sound/soc/qcom/Makefile2
-rw-r--r--sound/soc/qcom/sm8250.c277
3 files changed, 288 insertions, 0 deletions
diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index f51b28d1b94d..493f04e472f9 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -109,3 +109,12 @@ config SND_SOC_SDM845
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.
+config SND_SOC_SM8250
+ tristate "SoC Machine driver for SM8250 boards"
+ depends on QCOM_APR
+ 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.
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 41b2c7a23a4d..8236eed36c22 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -15,12 +15,14 @@ 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..8d6c3f84730b
--- /dev/null
+++ b/sound/soc/qcom/sm8250.c
@@ -0,0 +1,277 @@
+// 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 "qdsp6/q6afe.h"
+
+#define MI2S_BCLK_RATE 1536000
+#define DEFAULT_MCLK_RATE 24576000
+
+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 fmt = SND_SOC_DAIFMT_CBS_CFS;
+ 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 PRIMARY_MI2S_RX:
+ codec_dai_fmt |= SND_SOC_DAIFMT_NB_NF;
+
+ 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,
+ MI2S_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+ snd_soc_dai_set_fmt(cpu_dai, fmt);
+ snd_soc_dai_set_fmt(codec_dai, codec_dai_fmt);
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+static const struct snd_soc_ops sm8250_be_ops = {
+ .startup = sm8250_snd_startup,
+};
+
+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;
+ }
+ }
+}
+
+int sm8250_snd_parse_of(struct snd_soc_card *card)
+{
+ struct device_node *np;
+ struct device_node *codec = NULL;
+ struct device_node *platform = NULL;
+ struct device_node *cpu = NULL;
+ struct device *dev = card->dev;
+ struct snd_soc_dai_link *link;
+ struct of_phandle_args args;
+ struct snd_soc_dai_link_component *dlc;
+ int ret, num_links;
+
+ ret = snd_soc_of_parse_card_name(card, "model");
+ if (ret) {
+ dev_err(dev, "Error parsing card name: %d\n", ret);
+ return ret;
+ }
+
+ /* DAPM routes */
+ if (of_property_read_bool(dev->of_node, "audio-routing")) {
+ ret = snd_soc_of_parse_audio_routing(card,
+ "audio-routing");
+ if (ret)
+ return ret;
+ }
+
+ /* Populate links */
+ num_links = of_get_child_count(dev->of_node);
+
+ /* Allocate the DAI link array */
+ card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
+ if (!card->dai_link)
+ return -ENOMEM;
+
+ card->num_links = num_links;
+ link = card->dai_link;
+
+ for_each_child_of_node(dev->of_node, np) {
+ dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
+ if (!dlc)
+ return -ENOMEM;
+
+ link->cpus = &dlc[0];
+ link->platforms = &dlc[1];
+
+ link->num_cpus = 1;
+ link->num_platforms = 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 err;
+ }
+
+ cpu = of_get_child_by_name(np, "cpu");
+ platform = of_get_child_by_name(np, "platform");
+
+ if (!cpu) {
+ dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = of_parse_phandle_with_args(cpu, "sound-dai",
+ "#sound-dai-cells", 0, &args);
+ if (ret) {
+ dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
+ goto err;
+ }
+ link->cpus->of_node = args.np;
+ link->id = args.args[0];
+
+ ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
+ if (ret) {
+ dev_err(card->dev, "%s: error getting cpu dai name\n", link->name);
+ goto err;
+ }
+
+ if (platform) {
+ link->platforms->of_node = of_parse_phandle(platform,
+ "sound-dai",
+ 0);
+ if (!link->platforms->of_node) {
+ dev_err(card->dev, "%s: platform dai not found\n", link->name);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
+ if (!dlc)
+ return -ENOMEM;
+
+ link->codecs = dlc;
+ link->num_codecs = 1;
+ link->codecs->dai_name = "snd-soc-dummy-dai";
+ link->codecs->name = "snd-soc-dummy";
+
+ link->dynamic = 1;
+ link->no_pcm = 1;
+ link->ignore_pmdown_time = 1;
+
+ if (q6afe_is_rx_port(link->id)) {
+ link->dpcm_playback = 1;
+ link->dpcm_capture = 0;
+ } else {
+ link->dpcm_playback = 0;
+ link->dpcm_capture = 1;
+ }
+
+ } else {
+ dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
+ if (!dlc)
+ return -ENOMEM;
+
+ link->codecs = dlc;
+ link->num_codecs = 1;
+
+ link->platforms->of_node = link->cpus->of_node;
+ link->codecs->dai_name = "snd-soc-dummy-dai";
+ link->codecs->name = "snd-soc-dummy";
+ link->dynamic = 1;
+ link->dpcm_playback = 1;
+ link->dpcm_capture = 1;
+ }
+
+ link->ignore_suspend = 1;
+ link->nonatomic = 1;
+ link->stream_name = link->name;
+ link++;
+
+ of_node_put(cpu);
+ of_node_put(platform);
+ }
+
+ return 0;
+err:
+ of_node_put(np);
+ of_node_put(cpu);
+ of_node_put(codec);
+ of_node_put(platform);
+ kfree(card->dai_link);
+ return ret;
+}
+
+static int sm8250_platform_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ card = kzalloc(sizeof(*card), GFP_KERNEL);
+ if (!card)
+ return -ENOMEM;
+
+ card->dev = dev;
+ dev_set_drvdata(dev, card);
+ ret = sm8250_snd_parse_of(card);
+ if (ret)
+ goto err;
+
+ sm8250_add_be_ops(card);
+ ret = snd_soc_register_card(card);
+ if (ret)
+ goto err_card_register;
+
+ return 0;
+
+err_card_register:
+ kfree(card->dai_link);
+err:
+ kfree(card);
+ return ret;
+}
+
+static int sm8250_platform_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = dev_get_drvdata(&pdev->dev);
+
+ snd_soc_unregister_card(card);
+ kfree(card->dai_link);
+ kfree(card);
+
+ return 0;
+}
+
+static const struct of_device_id snd_sm8250_dt_match[] = {
+ {.compatible = "qcom,sm8250-sndcard"},
+ {}
+};
+
+MODULE_DEVICE_TABLE(of, snd_sm8250_dt_match);
+
+static struct platform_driver snd_sm8250_driver = {
+ .probe = sm8250_platform_probe,
+ .remove = sm8250_platform_remove,
+ .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");