[PATCH 13/21] ASoC: amd: acp70: add acp pdm driver pm ops

[Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>]

Add acp pdm driver pm ops for ACP7.0 & ACP7.1 platforms.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
---
 sound/soc/amd/acp70/acp70-pdm-dma.c | 57 +++++++++++++++++++++++++++++
 sound/soc/amd/acp70/acp70.h         |  3 ++
 2 files changed, 60 insertions(+)

diff --git a/sound/soc/amd/acp70/acp70-pdm-dma.c b/sound/soc/amd/acp70/acp70-pdm-dma.c
index 197214e68489..0d24c9ed917f 100644
--- a/sound/soc/amd/acp70/acp70-pdm-dma.c
+++ b/sound/soc/amd/acp70/acp70-pdm-dma.c
@@ -13,6 +13,7 @@
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/soc-dai.h>
+#include <linux/pm_runtime.h>
 
 #include "acp70.h"
 
@@ -388,13 +389,69 @@ static int acp70_pdm_audio_probe(struct platform_device *pdev)
 
 		return -ENODEV;
 	}
+	pm_runtime_set_autosuspend_delay(&pdev->dev, ACP_SUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_mark_last_busy(&pdev->dev);
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
 	return 0;
 }
 
+static void acp70_pdm_audio_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+}
+
+static int __maybe_unused acp70_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);
+		acp70_config_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
+		acp70_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, buffer_len,
+					   period_bytes, adata->acp70_base);
+	}
+	acp70_enable_pdm_interrupts(adata);
+	return 0;
+}
+
+static int __maybe_unused acp70_pdm_suspend(struct device *dev)
+{
+	struct pdm_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp70_disable_pdm_interrupts(adata);
+	return 0;
+}
+
+static int __maybe_unused acp70_pdm_runtime_resume(struct device *dev)
+{
+	struct pdm_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp70_enable_pdm_interrupts(adata);
+	return 0;
+}
+
+static const struct dev_pm_ops acp70_pdm_pm_ops = {
+	SET_RUNTIME_PM_OPS(acp70_pdm_suspend, acp70_pdm_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(acp70_pdm_suspend, acp70_pdm_resume)
+};
+
 static struct platform_driver acp70_pdm_dma_driver = {
 	.probe = acp70_pdm_audio_probe,
+	.remove = acp70_pdm_audio_remove,
 	.driver = {
 		.name = "acp70_pdm_dma",
+		.pm = &acp70_pdm_pm_ops,
 	},
 };
 
diff --git a/sound/soc/amd/acp70/acp70.h b/sound/soc/amd/acp70/acp70.h
index d5ab606adedc..1d8e670264fc 100644
--- a/sound/soc/amd/acp70/acp70.h
+++ b/sound/soc/amd/acp70/acp70.h
@@ -133,6 +133,9 @@
 #define SDW_MAX_BUFFER (SDW_PLAYBACK_MAX_PERIOD_SIZE * SDW_PLAYBACK_MAX_NUM_PERIODS)
 #define SDW_MIN_BUFFER SDW_MAX_BUFFER
 
+/* time in ms for runtime suspend delay */
+#define ACP_SUSPEND_DELAY_MS	2000
+
 enum acp_config {
 	ACP_CONFIG_0 = 0,
 	ACP_CONFIG_1,
-- 
2.34.1