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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 16:36:47 +07:00
128f825aea
Some machine may share the same I2S lines for multiple codecs. For example, mediatek/mt8183/mt8183-da7219-max98357 shares the same lines between max98357a and da7219. When writing audio data through the I2S lines, all codecs on the lines would try to generate sound if they accepts DO line. As a result, multiple codecs generate sound at a time. Moves control of SD_MODE to DAPM so that machine drivers have chances to manipulate DAPM widget to turn on/off max98357a. Signed-off-by: Tzung-Bi Shih <tzungbi@google.com> Link: https://lore.kernel.org/r/20200212124608.1.I73b26b5e319de173d05823e79f5861bf1826261c@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
153 lines
3.9 KiB
C
153 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
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*
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* max98357a.c -- MAX98357A ALSA SoC Codec driver
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*/
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/kernel.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include <sound/soc-dapm.h>
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struct max98357a_priv {
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struct gpio_desc *sdmode;
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unsigned int sdmode_delay;
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};
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static int max98357a_sdmode_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol, int event)
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{
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struct snd_soc_component *component =
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snd_soc_dapm_to_component(w->dapm);
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struct max98357a_priv *max98357a =
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snd_soc_component_get_drvdata(component);
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if (!max98357a->sdmode)
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return 0;
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if (event & SND_SOC_DAPM_POST_PMU) {
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msleep(max98357a->sdmode_delay);
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gpiod_set_value(max98357a->sdmode, 1);
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dev_dbg(component->dev, "set sdmode to 1");
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} else if (event & SND_SOC_DAPM_PRE_PMD) {
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gpiod_set_value(max98357a->sdmode, 0);
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dev_dbg(component->dev, "set sdmode to 0");
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}
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return 0;
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}
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static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {
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SND_SOC_DAPM_OUTPUT("Speaker"),
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SND_SOC_DAPM_OUT_DRV_E("SD_MODE", SND_SOC_NOPM, 0, 0, NULL, 0,
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max98357a_sdmode_event,
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SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
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};
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static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
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{"SD_MODE", NULL, "HiFi Playback"},
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{"Speaker", NULL, "SD_MODE"},
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};
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static const struct snd_soc_component_driver max98357a_component_driver = {
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.dapm_widgets = max98357a_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets),
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.dapm_routes = max98357a_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes),
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.idle_bias_on = 1,
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.use_pmdown_time = 1,
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.endianness = 1,
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.non_legacy_dai_naming = 1,
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};
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static struct snd_soc_dai_driver max98357a_dai_driver = {
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.name = "HiFi",
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.playback = {
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.stream_name = "HiFi Playback",
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.formats = SNDRV_PCM_FMTBIT_S16 |
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SNDRV_PCM_FMTBIT_S24 |
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SNDRV_PCM_FMTBIT_S32,
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.rates = SNDRV_PCM_RATE_8000 |
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SNDRV_PCM_RATE_16000 |
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SNDRV_PCM_RATE_32000 |
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SNDRV_PCM_RATE_44100 |
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SNDRV_PCM_RATE_48000 |
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SNDRV_PCM_RATE_88200 |
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SNDRV_PCM_RATE_96000,
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.rate_min = 8000,
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.rate_max = 96000,
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.channels_min = 1,
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.channels_max = 2,
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},
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};
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static int max98357a_platform_probe(struct platform_device *pdev)
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{
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struct max98357a_priv *max98357a;
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int ret;
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max98357a = devm_kzalloc(&pdev->dev, sizeof(*max98357a), GFP_KERNEL);
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if (!max98357a)
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return -ENOMEM;
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max98357a->sdmode = devm_gpiod_get_optional(&pdev->dev,
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"sdmode", GPIOD_OUT_LOW);
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if (IS_ERR(max98357a->sdmode))
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return PTR_ERR(max98357a->sdmode);
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ret = device_property_read_u32(&pdev->dev, "sdmode-delay",
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&max98357a->sdmode_delay);
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if (ret) {
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max98357a->sdmode_delay = 0;
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dev_dbg(&pdev->dev,
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"no optional property 'sdmode-delay' found, "
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"default: no delay\n");
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}
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dev_set_drvdata(&pdev->dev, max98357a);
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return devm_snd_soc_register_component(&pdev->dev,
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&max98357a_component_driver,
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&max98357a_dai_driver, 1);
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}
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#ifdef CONFIG_OF
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static const struct of_device_id max98357a_device_id[] = {
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{ .compatible = "maxim,max98357a" },
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{}
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};
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MODULE_DEVICE_TABLE(of, max98357a_device_id);
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#endif
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id max98357a_acpi_match[] = {
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{ "MX98357A", 0 },
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{},
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};
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MODULE_DEVICE_TABLE(acpi, max98357a_acpi_match);
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#endif
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static struct platform_driver max98357a_platform_driver = {
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.driver = {
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.name = "max98357a",
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.of_match_table = of_match_ptr(max98357a_device_id),
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.acpi_match_table = ACPI_PTR(max98357a_acpi_match),
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},
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.probe = max98357a_platform_probe,
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};
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module_platform_driver(max98357a_platform_driver);
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MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");
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MODULE_LICENSE("GPL v2");
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