linux-kernel - [PATCH 09/13] ASoC: amd: add acp6x pdm driver pm ops

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Date:   Mon, 11 Oct 2021 11:26:17 +0530
From:   Vijendar Mukunda <Vijendar.Mukunda@....com>
To:     <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC:     <Alexander.Deucher@....com>, <Basavaraj.Hiregoudar@....com>,
        <Sunil-kumar.Dommati@....com>, <Mario.Limonciello@....com>,
        <Richard.Gong@....com>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        "Liam Girdwood" <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        "Takashi Iwai" <tiwai@...e.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 09/13] ASoC: amd: add acp6x pdm driver pm ops

Add acp6x pdm driver pm ops.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/yc/acp6x-pdm-dma.c | 57 ++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/sound/soc/amd/yc/acp6x-pdm-dma.c b/sound/soc/amd/yc/acp6x-pdm-dma.c
index 3da74b1896e1..a37df4d051e5 100644
--- a/sound/soc/amd/yc/acp6x-pdm-dma.c
+++ b/sound/soc/amd/yc/acp6x-pdm-dma.c
@@ -11,6 +11,7 @@
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/soc-dai.h>
+#include <linux/pm_runtime.h>
 
 #include "acp6x.h"
 
@@ -372,13 +373,69 @@ static int acp6x_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_enable(&pdev->dev);
+	pm_runtime_allow(&pdev->dev);
 	return 0;
 }
 
+static int acp6x_pdm_audio_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static int __maybe_unused acp6x_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);
+		acp6x_config_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
+		acp6x_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, buffer_len,
+					   period_bytes, adata->acp6x_base);
+	}
+	acp6x_enable_pdm_interrupts(adata->acp6x_base);
+	return 0;
+}
+
+static int __maybe_unused acp6x_pdm_suspend(struct device *dev)
+{
+	struct pdm_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp6x_disable_pdm_interrupts(adata->acp6x_base);
+	return 0;
+}
+
+static int __maybe_unused acp6x_pdm_runtime_resume(struct device *dev)
+{
+	struct pdm_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp6x_enable_pdm_interrupts(adata->acp6x_base);
+	return 0;
+}
+
+static const struct dev_pm_ops acp6x_pdm_pm_ops = {
+	SET_RUNTIME_PM_OPS(acp6x_pdm_suspend, acp6x_pdm_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(acp6x_pdm_suspend, acp6x_pdm_resume)
+};
+
 static struct platform_driver acp6x_pdm_dma_driver = {
 	.probe = acp6x_pdm_audio_probe,
+	.remove = acp6x_pdm_audio_remove,
 	.driver = {
 		.name = "acp_yc_pdm_dma",
+		.pm = &acp6x_pdm_pm_ops,
 	},
 };
 
-- 
2.25.1