Commit 4e723e75 authored by Olivier Moysan's avatar Olivier Moysan Committed by Mark Brown

ASoC: stm32: sai: add pm_runtime support

Enable support of pm_runtime on STM32 SAI driver to allow
SAI power state monitoring.
pm_runtime_put_autosuspend() is called from ASoC framework
on pcm device close.
The pmdown_time delay is available in runtime context, and may be set
in SAI driver to take into account shutdown delay on playback.
However, this shutdown delay is already handled in the DAPMs
of the audio codec linked to SAI CPU DAI.
So, the choice is made, not to support this delay on CPU DAI side.
Signed-off-by: default avatarOlivier Moysan <olivier.moysan@st.com>
Link: https://lore.kernel.org/r/20200911081507.7276-1-olivier.moysan@st.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
parent 375e2c35
......@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <sound/asoundef.h>
......@@ -1559,10 +1560,14 @@ static int stm32_sai_sub_probe(struct platform_device *pdev)
ret = snd_soc_register_component(&pdev->dev, &stm32_component,
&sai->cpu_dai_drv, 1);
if (ret)
if (ret) {
snd_dmaengine_pcm_unregister(&pdev->dev);
return ret;
}
pm_runtime_enable(&pdev->dev);
return 0;
}
static int stm32_sai_sub_remove(struct platform_device *pdev)
......@@ -1572,6 +1577,7 @@ static int stm32_sai_sub_remove(struct platform_device *pdev)
clk_unprepare(sai->pdata->pclk);
snd_dmaengine_pcm_unregister(&pdev->dev);
snd_soc_unregister_component(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
......
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