mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 01:49:36 +00:00
![Amadeusz Sławiński](/assets/img/avatar_default.png)
In case that there are other components assigned to runtime device, depending on order dummy component can override their params with its own, which shouldn't happen. Check if there are any other components assigned to rtd and if so, skip setting hwparams. Occurs when using topology where 'snd-soc-dummy' gets assigned by default as codec and platform component. Alternative approach would be to copy whole dummy handling and rename it to "snd-soc-null" or something similar. And remove hwparams assignment to make it really do nothing. Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com> Link: https://lore.kernel.org/r/20211015161257.27052-7-cezary.rojewski@intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
226 lines
5.5 KiB
C
226 lines
5.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
//
|
|
// soc-util.c -- ALSA SoC Audio Layer utility functions
|
|
//
|
|
// Copyright 2009 Wolfson Microelectronics PLC.
|
|
//
|
|
// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
|
|
// Liam Girdwood <lrg@slimlogic.co.uk>
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/export.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/soc.h>
|
|
|
|
int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
|
|
{
|
|
return sample_size * channels * tdm_slots;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
|
|
|
|
int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
|
|
{
|
|
int sample_size;
|
|
|
|
sample_size = snd_pcm_format_width(params_format(params));
|
|
if (sample_size < 0)
|
|
return sample_size;
|
|
|
|
return snd_soc_calc_frame_size(sample_size, params_channels(params),
|
|
1);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
|
|
|
|
int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
|
|
{
|
|
return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
|
|
|
|
int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
|
|
{
|
|
int ret;
|
|
|
|
ret = snd_soc_params_to_frame_size(params);
|
|
|
|
if (ret > 0)
|
|
return ret * params_rate(params);
|
|
else
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
|
|
|
|
static const struct snd_pcm_hardware dummy_dma_hardware = {
|
|
/* Random values to keep userspace happy when checking constraints */
|
|
.info = SNDRV_PCM_INFO_INTERLEAVED |
|
|
SNDRV_PCM_INFO_BLOCK_TRANSFER,
|
|
.buffer_bytes_max = 128*1024,
|
|
.period_bytes_min = PAGE_SIZE,
|
|
.period_bytes_max = PAGE_SIZE*2,
|
|
.periods_min = 2,
|
|
.periods_max = 128,
|
|
};
|
|
|
|
|
|
static const struct snd_soc_component_driver dummy_platform;
|
|
|
|
static int dummy_dma_open(struct snd_soc_component *component,
|
|
struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
|
|
int i;
|
|
|
|
/*
|
|
* If there are other components associated with rtd, we shouldn't
|
|
* override their hwparams
|
|
*/
|
|
for_each_rtd_components(rtd, i, component) {
|
|
if (component->driver == &dummy_platform)
|
|
return 0;
|
|
}
|
|
|
|
/* BE's dont need dummy params */
|
|
if (!rtd->dai_link->no_pcm)
|
|
snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_component_driver dummy_platform = {
|
|
.open = dummy_dma_open,
|
|
};
|
|
|
|
static const struct snd_soc_component_driver dummy_codec = {
|
|
.idle_bias_on = 1,
|
|
.use_pmdown_time = 1,
|
|
.endianness = 1,
|
|
.non_legacy_dai_naming = 1,
|
|
};
|
|
|
|
#define STUB_RATES SNDRV_PCM_RATE_8000_384000
|
|
#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
|
|
SNDRV_PCM_FMTBIT_U8 | \
|
|
SNDRV_PCM_FMTBIT_S16_LE | \
|
|
SNDRV_PCM_FMTBIT_U16_LE | \
|
|
SNDRV_PCM_FMTBIT_S24_LE | \
|
|
SNDRV_PCM_FMTBIT_S24_3LE | \
|
|
SNDRV_PCM_FMTBIT_U24_LE | \
|
|
SNDRV_PCM_FMTBIT_S32_LE | \
|
|
SNDRV_PCM_FMTBIT_U32_LE | \
|
|
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
|
|
|
|
/*
|
|
* Select these from Sound Card Manually
|
|
* SND_SOC_POSSIBLE_DAIFMT_CBP_CFP
|
|
* SND_SOC_POSSIBLE_DAIFMT_CBP_CFC
|
|
* SND_SOC_POSSIBLE_DAIFMT_CBC_CFP
|
|
* SND_SOC_POSSIBLE_DAIFMT_CBC_CFC
|
|
*/
|
|
static u64 dummy_dai_formats =
|
|
SND_SOC_POSSIBLE_DAIFMT_I2S |
|
|
SND_SOC_POSSIBLE_DAIFMT_RIGHT_J |
|
|
SND_SOC_POSSIBLE_DAIFMT_LEFT_J |
|
|
SND_SOC_POSSIBLE_DAIFMT_DSP_A |
|
|
SND_SOC_POSSIBLE_DAIFMT_DSP_B |
|
|
SND_SOC_POSSIBLE_DAIFMT_AC97 |
|
|
SND_SOC_POSSIBLE_DAIFMT_PDM |
|
|
SND_SOC_POSSIBLE_DAIFMT_GATED |
|
|
SND_SOC_POSSIBLE_DAIFMT_CONT |
|
|
SND_SOC_POSSIBLE_DAIFMT_NB_NF |
|
|
SND_SOC_POSSIBLE_DAIFMT_NB_IF |
|
|
SND_SOC_POSSIBLE_DAIFMT_IB_NF |
|
|
SND_SOC_POSSIBLE_DAIFMT_IB_IF;
|
|
|
|
static const struct snd_soc_dai_ops dummy_dai_ops = {
|
|
.auto_selectable_formats = &dummy_dai_formats,
|
|
.num_auto_selectable_formats = 1,
|
|
};
|
|
|
|
/*
|
|
* The dummy CODEC is only meant to be used in situations where there is no
|
|
* actual hardware.
|
|
*
|
|
* If there is actual hardware even if it does not have a control bus
|
|
* the hardware will still have constraints like supported samplerates, etc.
|
|
* which should be modelled. And the data flow graph also should be modelled
|
|
* using DAPM.
|
|
*/
|
|
static struct snd_soc_dai_driver dummy_dai = {
|
|
.name = "snd-soc-dummy-dai",
|
|
.playback = {
|
|
.stream_name = "Playback",
|
|
.channels_min = 1,
|
|
.channels_max = 384,
|
|
.rates = STUB_RATES,
|
|
.formats = STUB_FORMATS,
|
|
},
|
|
.capture = {
|
|
.stream_name = "Capture",
|
|
.channels_min = 1,
|
|
.channels_max = 384,
|
|
.rates = STUB_RATES,
|
|
.formats = STUB_FORMATS,
|
|
},
|
|
.ops = &dummy_dai_ops,
|
|
};
|
|
|
|
int snd_soc_dai_is_dummy(struct snd_soc_dai *dai)
|
|
{
|
|
if (dai->driver == &dummy_dai)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
int snd_soc_component_is_dummy(struct snd_soc_component *component)
|
|
{
|
|
return ((component->driver == &dummy_platform) ||
|
|
(component->driver == &dummy_codec));
|
|
}
|
|
|
|
static int snd_soc_dummy_probe(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev,
|
|
&dummy_codec, &dummy_dai, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev, &dummy_platform,
|
|
NULL, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver soc_dummy_driver = {
|
|
.driver = {
|
|
.name = "snd-soc-dummy",
|
|
},
|
|
.probe = snd_soc_dummy_probe,
|
|
};
|
|
|
|
static struct platform_device *soc_dummy_dev;
|
|
|
|
int __init snd_soc_util_init(void)
|
|
{
|
|
int ret;
|
|
|
|
soc_dummy_dev =
|
|
platform_device_register_simple("snd-soc-dummy", -1, NULL, 0);
|
|
if (IS_ERR(soc_dummy_dev))
|
|
return PTR_ERR(soc_dummy_dev);
|
|
|
|
ret = platform_driver_register(&soc_dummy_driver);
|
|
if (ret != 0)
|
|
platform_device_unregister(soc_dummy_dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void __exit snd_soc_util_exit(void)
|
|
{
|
|
platform_driver_unregister(&soc_dummy_driver);
|
|
platform_device_unregister(soc_dummy_dev);
|
|
}
|