@@ -8,6 +8,7 @@
#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
+#include <linux/pm_runtime.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
@@ -453,19 +454,71 @@ static int acp_pdm_audio_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "ACP PDM IRQ request failed\n");
return -ENODEV;
}
+ pm_runtime_set_autosuspend_delay(&pdev->dev, ACP_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_allow(&pdev->dev);
return 0;
}
static int acp_pdm_audio_remove(struct platform_device *pdev)
{
+ pm_runtime_disable(&pdev->dev);
return 0;
}
+static int acp_pdm_resume(struct device *dev)
+{
+ struct pdm_dev_data *adata;
+ struct snd_pcm_runtime *runtime;
+ struct pdm_stream_instance *rtd;
+ u32 period_bytes, buffer_len;
+
+ adata = dev_get_drvdata(dev);
+ if (adata->capture_stream && adata->capture_stream->runtime) {
+ runtime = adata->capture_stream->runtime;
+ rtd = runtime->private_data;
+ period_bytes = frames_to_bytes(runtime, runtime->period_size);
+ buffer_len = frames_to_bytes(runtime, runtime->buffer_size);
+ config_acp_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
+ init_pdm_ring_buffer(MEM_WINDOW_START, buffer_len, period_bytes,
+ adata->acp_base);
+ }
+ enable_pdm_interrupts(adata->acp_base);
+ return 0;
+}
+
+static int acp_pdm_runtime_suspend(struct device *dev)
+{
+ struct pdm_dev_data *adata;
+
+ adata = dev_get_drvdata(dev);
+ disable_pdm_interrupts(adata->acp_base);
+
+ return 0;
+}
+
+static int acp_pdm_runtime_resume(struct device *dev)
+{
+ struct pdm_dev_data *adata;
+
+ adata = dev_get_drvdata(dev);
+ enable_pdm_interrupts(adata->acp_base);
+ return 0;
+}
+
+static const struct dev_pm_ops acp_pdm_pm_ops = {
+ .runtime_suspend = acp_pdm_runtime_suspend,
+ .runtime_resume = acp_pdm_runtime_resume,
+ .resume = acp_pdm_resume,
+};
+
static struct platform_driver acp_pdm_dma_driver = {
.probe = acp_pdm_audio_probe,
.remove = acp_pdm_audio_remove,
.driver = {
.name = "acp_rn_pdm_dma",
+ .pm = &acp_pdm_pm_ops,
},
};