From 4e723e7565c4031568fb9db18253cfbf6442831d Mon Sep 17 00:00:00 2001 From: Olivier Moysan Date: Fri, 11 Sep 2020 10:15:07 +0200 Subject: 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: Olivier Moysan Link: https://lore.kernel.org/r/20200911081507.7276-1-olivier.moysan@st.com Signed-off-by: Mark Brown --- sound/soc/stm/stm32_sai_sub.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'sound/soc/stm') diff --git a/sound/soc/stm/stm32_sai_sub.c b/sound/soc/stm/stm32_sai_sub.c index 3fb9513cedb2..3aa1cf262402 100644 --- a/sound/soc/stm/stm32_sai_sub.c +++ b/sound/soc/stm/stm32_sai_sub.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -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; + } - 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; } -- cgit