From: Maruthi Srinivas Bayyavarapu Maruthi.Bayyavarapu@amd.com
genpd will power off/on ACP to manage runtime ACP PM. ACP runtime PM hooks are added to get it deinitialized and initialized respectively, after it is powered off/on.
When system goes to suspend when audio usecase is active, ACP will be powered off through genpd. When it resumes, ACP needs to be initialized and reconfigured.
Acked-by: Christian König christian.koenig@amd.com Signed-off-by: Maruthi Bayyavarapu maruthi.bayyavarapu@amd.com Reviewed-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com --- sound/soc/amd/acp-pcm-dma.c | 60 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+)
diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c index 0494ac8..a45e910 100644 --- a/sound/soc/amd/acp-pcm-dma.c +++ b/sound/soc/amd/acp-pcm-dma.c @@ -15,6 +15,7 @@
#include <linux/module.h> #include <linux/delay.h> +#include <linux/pm_runtime.h>
#include <sound/soc.h>
@@ -895,6 +896,10 @@ static int acp_audio_probe(struct platform_device *pdev) return status; }
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 10000); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_enable(&pdev->dev); + return status; }
@@ -904,15 +909,70 @@ static int acp_audio_remove(struct platform_device *pdev)
acp_deinit(adata->acp_mmio); snd_soc_unregister_platform(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static int acp_pcm_resume(struct device *dev) +{ + struct snd_pcm_substream *stream; + struct snd_pcm_runtime *rtd; + struct audio_substream_data *sdata; + struct audio_drv_data *adata = dev_get_drvdata(dev); + + acp_init(adata->acp_mmio); + + stream = adata->play_stream; + rtd = stream ? stream->runtime : NULL; + if (rtd != NULL) { + /* Resume playback stream from a suspended state */ + sdata = rtd->private_data; + config_acp_dma(adata->acp_mmio, sdata); + } + + stream = adata->capture_stream; + rtd = stream ? stream->runtime : NULL; + if (rtd != NULL) { + /* Resume capture stream from a suspended state */ + sdata = rtd->private_data; + config_acp_dma(adata->acp_mmio, sdata); + } + + acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB); + return 0; +} + +static int acp_pcm_runtime_suspend(struct device *dev) +{ + struct audio_drv_data *adata = dev_get_drvdata(dev);
+ acp_deinit(adata->acp_mmio); + acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB); return 0; }
+static int acp_pcm_runtime_resume(struct device *dev) +{ + struct audio_drv_data *adata = dev_get_drvdata(dev); + + acp_init(adata->acp_mmio); + acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB); + return 0; +} + +static const struct dev_pm_ops acp_pm_ops = { + .resume = acp_pcm_resume, + .runtime_suspend = acp_pcm_runtime_suspend, + .runtime_resume = acp_pcm_runtime_resume, +}; + static struct platform_driver acp_dma_driver = { .probe = acp_audio_probe, .remove = acp_audio_remove, .driver = { .name = "acp_audio_dma", + .pm = &acp_pm_ops, }, };