linux/sound/soc/fsl/imx-rpmsg.c
Chancel Liu c14445bdcb ASoC: fsl: imx-rpmsg: Update to correct DT node
In order to support register and unregister rpmsg sound card through
remoteproc platform device for card to probe is registered in
imx-audio-rpmsg. ASoC machine driver no longer can get DT node of ASoC
CPU DAI device through parent device.

ASoC machine driver can get DT node of ASoC CPU DAI device with rpmsg
channel name acquired from platform specific data.

Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
Link: https://msgid.link/r/20240311111349.723256-6-chancel.liu@nxp.com
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-03-25 00:32:52 +00:00

257 lines
6.7 KiB
C

// SPDX-License-Identifier: GPL-2.0+
// Copyright 2017-2020 NXP
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_reserved_mem.h>
#include <linux/i2c.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <sound/control.h>
#include <sound/pcm_params.h>
#include <sound/soc-dapm.h>
#include "imx-pcm-rpmsg.h"
struct imx_rpmsg {
struct snd_soc_dai_link dai;
struct snd_soc_card card;
unsigned long sysclk;
bool lpa;
};
static struct dev_pm_ops lpa_pm;
static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
SND_SOC_DAPM_MIC("Mic Jack", NULL),
SND_SOC_DAPM_MIC("Main MIC", NULL),
};
static int imx_rpmsg_late_probe(struct snd_soc_card *card)
{
struct imx_rpmsg *data = snd_soc_card_get_drvdata(card);
struct snd_soc_pcm_runtime *rtd = list_first_entry(&card->rtd_list,
struct snd_soc_pcm_runtime, list);
struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
struct device *dev = card->dev;
int ret;
if (data->lpa) {
struct snd_soc_component *codec_comp;
struct device_node *codec_np;
struct device_driver *codec_drv;
struct device *codec_dev = NULL;
codec_np = data->dai.codecs->of_node;
if (codec_np) {
struct platform_device *codec_pdev;
struct i2c_client *codec_i2c;
codec_i2c = of_find_i2c_device_by_node(codec_np);
if (codec_i2c)
codec_dev = &codec_i2c->dev;
if (!codec_dev) {
codec_pdev = of_find_device_by_node(codec_np);
if (codec_pdev)
codec_dev = &codec_pdev->dev;
}
}
if (codec_dev) {
codec_comp = snd_soc_lookup_component_nolocked(codec_dev, NULL);
if (codec_comp) {
int i, num_widgets;
const char *widgets;
struct snd_soc_dapm_context *dapm;
num_widgets = of_property_count_strings(data->card.dev->of_node,
"ignore-suspend-widgets");
for (i = 0; i < num_widgets; i++) {
of_property_read_string_index(data->card.dev->of_node,
"ignore-suspend-widgets",
i, &widgets);
dapm = snd_soc_component_get_dapm(codec_comp);
snd_soc_dapm_ignore_suspend(dapm, widgets);
}
}
codec_drv = codec_dev->driver;
if (codec_drv->pm) {
memcpy(&lpa_pm, codec_drv->pm, sizeof(lpa_pm));
lpa_pm.suspend = NULL;
lpa_pm.resume = NULL;
lpa_pm.freeze = NULL;
lpa_pm.thaw = NULL;
lpa_pm.poweroff = NULL;
lpa_pm.restore = NULL;
codec_drv->pm = &lpa_pm;
}
put_device(codec_dev);
}
}
if (!data->sysclk)
return 0;
ret = snd_soc_dai_set_sysclk(codec_dai, 0, data->sysclk, SND_SOC_CLOCK_IN);
if (ret && ret != -ENOTSUPP) {
dev_err(dev, "failed to set sysclk in %s\n", __func__);
return ret;
}
return 0;
}
static int imx_rpmsg_probe(struct platform_device *pdev)
{
struct snd_soc_dai_link_component *dlc;
struct snd_soc_dai *cpu_dai;
struct device_node *np = NULL;
struct of_phandle_args args;
const char *platform_name;
struct imx_rpmsg *data;
int ret = 0;
dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
if (!dlc)
return -ENOMEM;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
ret = -ENOMEM;
goto fail;
}
data->dai.cpus = &dlc[0];
data->dai.num_cpus = 1;
data->dai.platforms = &dlc[1];
data->dai.num_platforms = 1;
data->dai.codecs = &dlc[2];
data->dai.num_codecs = 1;
data->dai.name = "rpmsg hifi";
data->dai.stream_name = "rpmsg hifi";
data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBC_CFC;
/*
* i.MX rpmsg sound cards work on codec slave mode. MCLK will be
* disabled by CPU DAI driver in hw_free(). Some codec requires MCLK
* present at power up/down sequence. So need to set ignore_pmdown_time
* to power down codec immediately before MCLK is turned off.
*/
data->dai.ignore_pmdown_time = 1;
data->dai.cpus->dai_name = pdev->dev.platform_data;
cpu_dai = snd_soc_find_dai(data->dai.cpus);
if (!cpu_dai) {
ret = -EPROBE_DEFER;
goto fail;
}
np = cpu_dai->dev->of_node;
if (!np) {
dev_err(&pdev->dev, "failed to parse CPU DAI device node\n");
ret = -ENODEV;
goto fail;
}
ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);
if (ret)
dev_warn(&pdev->dev, "no reserved DMA memory\n");
/* Optional codec node */
ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);
if (ret) {
*data->dai.codecs = snd_soc_dummy_dlc;
} else {
struct clk *clk;
ret = snd_soc_get_dlc(&args, data->dai.codecs);
if (ret) {
dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
goto fail;
}
clk = devm_get_clk_from_child(&pdev->dev, args.np, NULL);
if (!IS_ERR(clk))
data->sysclk = clk_get_rate(clk);
}
if (!of_property_read_string(np, "fsl,rpmsg-channel-name", &platform_name))
data->dai.platforms->name = platform_name;
else
data->dai.platforms->name = "rpmsg-audio-channel";
data->dai.playback_only = true;
data->dai.capture_only = true;
data->card.num_links = 1;
data->card.dai_link = &data->dai;
if (of_property_read_bool(np, "fsl,rpmsg-out"))
data->dai.capture_only = false;
if (of_property_read_bool(np, "fsl,rpmsg-in"))
data->dai.playback_only = false;
if (data->dai.playback_only && data->dai.capture_only) {
dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");
ret = -EINVAL;
goto fail;
}
if (of_property_read_bool(np, "fsl,enable-lpa"))
data->lpa = true;
data->card.dev = &pdev->dev;
data->card.owner = THIS_MODULE;
data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
data->card.late_probe = imx_rpmsg_late_probe;
/*
* Inoder to use common api to get card name and audio routing.
* Use parent of_node for this device, revert it after finishing using
*/
data->card.dev->of_node = np;
ret = snd_soc_of_parse_card_name(&data->card, "model");
if (ret)
goto fail;
if (of_property_read_bool(np, "audio-routing")) {
ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
if (ret) {
dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
goto fail;
}
}
platform_set_drvdata(pdev, &data->card);
snd_soc_card_set_drvdata(&data->card, data);
ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
if (ret) {
dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");
goto fail;
}
fail:
pdev->dev.of_node = NULL;
return ret;
}
static struct platform_driver imx_rpmsg_driver = {
.driver = {
.name = "imx-audio-rpmsg",
.pm = &snd_soc_pm_ops,
},
.probe = imx_rpmsg_probe,
};
module_platform_driver(imx_rpmsg_driver);
MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
MODULE_ALIAS("platform:imx-audio-rpmsg");
MODULE_LICENSE("GPL v2");