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ASoC: stm32: i2s: manage rebind issue 

The commit e894efef9a ("ASoC: core: add support to card rebind")
allows to rebind the sound card after a rebind of one of its component.
With this commit, the sound card is actually rebound,
but may be no more functional.

Corrections:
- Call snd_dmaengine_pcm_register() before snd_soc_register_component().
- Call snd_dmaengine_pcm_unregister() and snd_soc_unregister_component()
explicitly from I2S driver.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Link: https://lore.kernel.org/r/20200318144125.9163-4-olivier.moysan@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Olivier Moysan 2020-03-18 15:41:25 +01:00 committed by Mark Brown
parent 794df9448e
commit caff4ce8cc
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 29 additions and 11 deletions
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40
sound/soc/stm/stm32_i2s.c
View File

@ -888,6 +888,14 @@ static int stm32_i2s_parse_dt(struct platform_device *pdev,
return 0;
}
static int stm32_i2s_remove(struct platform_device *pdev)
{
snd_dmaengine_pcm_unregister(&pdev->dev);
snd_soc_unregister_component(&pdev->dev);
return 0;
}
static int stm32_i2s_probe(struct platform_device *pdev)
{
struct stm32_i2s_data *i2s;
@ -921,47 +929,56 @@ static int stm32_i2s_probe(struct platform_device *pdev)
return PTR_ERR(i2s->regmap);
}
ret = devm_snd_soc_register_component(&pdev->dev, &stm32_i2s_component,
i2s->dai_drv, 1);
if (ret)
return ret;
ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
&stm32_i2s_pcm_config, 0);
ret = snd_dmaengine_pcm_register(&pdev->dev, &stm32_i2s_pcm_config, 0);
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev, "PCM DMA register error %d\n", ret);
return ret;
}
ret = snd_soc_register_component(&pdev->dev, &stm32_i2s_component,
i2s->dai_drv, 1);
if (ret) {
snd_dmaengine_pcm_unregister(&pdev->dev);
return ret;
}
/* Set SPI/I2S in i2s mode */
ret = regmap_update_bits(i2s->regmap, STM32_I2S_CGFR_REG,
I2S_CGFR_I2SMOD, I2S_CGFR_I2SMOD);
if (ret)
return ret;
goto error;
ret = regmap_read(i2s->regmap, STM32_I2S_IPIDR_REG, &val);
if (ret)
return ret;
goto error;
if (val == I2S_IPIDR_NUMBER) {
ret = regmap_read(i2s->regmap, STM32_I2S_HWCFGR_REG, &val);
if (ret)
return ret;
goto error;
if (!FIELD_GET(I2S_HWCFGR_I2S_SUPPORT_MASK, val)) {
dev_err(&pdev->dev,
"Device does not support i2s mode\n");
return -EPERM;
ret = -EPERM;
goto error;
}
ret = regmap_read(i2s->regmap, STM32_I2S_VERR_REG, &val);
if (ret)
goto error;
dev_dbg(&pdev->dev, "I2S version: %lu.%lu registered\n",
FIELD_GET(I2S_VERR_MAJ_MASK, val),
FIELD_GET(I2S_VERR_MIN_MASK, val));
}
return ret;
error:
stm32_i2s_remove(pdev);
return ret;
}
@ -998,6 +1015,7 @@ static struct platform_driver stm32_i2s_driver = {
.pm = &stm32_i2s_pm_ops,
},
.probe = stm32_i2s_probe,
.remove = stm32_i2s_remove,
};
module_platform_driver(stm32_i2s_driver);