ASoC: amd: acp: add pm ops support for renoir platform.

Add pm ops for renoir platform.

Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://msgid.link/r/20231215130300.1247475-1-Syed.SabaKareem@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: saba-kareem

sound/soc/amd/acp/acp-renoir.c

@@ -20,6 +20,7 @@
 #include <sound/soc.h>
 #include <sound/soc-dai.h>
 #include <linux/dma-mapping.h>
+#include <linux/pm_runtime.h>
 
 #include "amd.h"
 #include "acp-mach.h"
@@ -196,6 +197,11 @@ static int renoir_audio_probe(struct platform_device *pdev)
 	acp_enable_interrupts(adata);
 	acp_platform_register(dev);
 
+	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;
 }
 
@@ -208,11 +214,42 @@ static void renoir_audio_remove(struct platform_device *pdev)
 	acp_platform_unregister(dev);
 }
 
+static int __maybe_unused rn_pcm_resume(struct device *dev)
+{
+	struct acp_dev_data *adata = dev_get_drvdata(dev);
+	struct acp_stream *stream;
+	struct snd_pcm_substream *substream;
+	snd_pcm_uframes_t buf_in_frames;
+	u64 buf_size;
+
+	spin_lock(&adata->acp_lock);
+	list_for_each_entry(stream, &adata->stream_list, list) {
+		substream = stream->substream;
+		if (substream && substream->runtime) {
+			buf_in_frames = (substream->runtime->buffer_size);
+			buf_size = frames_to_bytes(substream->runtime, buf_in_frames);
+			config_pte_for_stream(adata, stream);
+			config_acp_dma(adata, stream, buf_size);
+			if (stream->dai_id)
+				restore_acp_i2s_params(substream, adata, stream);
+			else
+				restore_acp_pdm_params(substream, adata);
+		}
+	}
+	spin_unlock(&adata->acp_lock);
+	return 0;
+}
+
+static const struct dev_pm_ops rn_dma_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(NULL, rn_pcm_resume)
+};
+
 static struct platform_driver renoir_driver = {
 	.probe = renoir_audio_probe,
 	.remove_new = renoir_audio_remove,
 	.driver = {
 		.name = "acp_asoc_renoir",
+		.pm = &rn_dma_pm_ops,
 	},
 };