From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@xxxxxxx>
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@xxxxxxx>
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
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,
},
};
--
2.5.0
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