linux-kernel - [PATCH V3 11/12] ASoC: amd: add vangogh i2s dma driver pm ops

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Message-ID: <20210719165140.16143-12-vijendar.mukunda@amd.com>
Date:   Mon, 19 Jul 2021 22:21:39 +0530
From:   Vijendar Mukunda <vijendar.mukunda@....com>
To:     <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC:     <Alexander.Deucher@....com>, <Sunil-kumar.Dommati@....com>,
        <krisman@...labora.com>,
        Vijendar Mukunda <vijendar.mukunda@....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 V3 11/12] ASoC: amd: add vangogh i2s dma driver pm ops

Add Vangogh i2s dma driver pm ops

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/vangogh/acp5x-pcm-dma.c | 90 +++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/sound/soc/amd/vangogh/acp5x-pcm-dma.c b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
index a2bd53dc86b9..260b6ae0fb2f 100644
--- a/sound/soc/amd/vangogh/acp5x-pcm-dma.c
+++ b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
@@ -8,6 +8,7 @@
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/io.h>
+#include <linux/pm_runtime.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
@@ -417,13 +418,102 @@ static int acp5x_audio_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "ACP5x I2S IRQ request failed\n");
 		return -ENODEV;
 	}
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_allow(&pdev->dev);
 	return 0;
 }
 
+static int acp5x_audio_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static int acp5x_pcm_resume(struct device *dev)
+{
+	struct i2s_dev_data *adata;
+	u32 val, reg_val, frmt_val;
+
+	reg_val = 0;
+	frmt_val = 0;
+	adata = dev_get_drvdata(dev);
+
+	if (adata->play_stream && adata->play_stream->runtime) {
+		struct i2s_stream_instance *rtd =
+			adata->play_stream->runtime->private_data;
+		config_acp5x_dma(rtd, SNDRV_PCM_STREAM_PLAYBACK);
+		switch (rtd->i2s_instance) {
+		case I2S_HS_INSTANCE:
+			reg_val = ACP_HSTDM_ITER;
+			frmt_val = ACP_HSTDM_TXFRMT;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			reg_val = ACP_I2STDM_ITER;
+			frmt_val = ACP_I2STDM_TXFRMT;
+		}
+		acp_writel((rtd->xfer_resolution  << 3),
+			   rtd->acp5x_base + reg_val);
+	}
+
+	if (adata->capture_stream && adata->capture_stream->runtime) {
+		struct i2s_stream_instance *rtd =
+			adata->capture_stream->runtime->private_data;
+		config_acp5x_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
+		switch (rtd->i2s_instance) {
+		case I2S_HS_INSTANCE:
+			reg_val = ACP_HSTDM_IRER;
+			frmt_val = ACP_HSTDM_RXFRMT;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			reg_val = ACP_I2STDM_IRER;
+			frmt_val = ACP_I2STDM_RXFRMT;
+		}
+		acp_writel((rtd->xfer_resolution  << 3),
+			   rtd->acp5x_base + reg_val);
+	}
+	if (adata->tdm_mode == TDM_ENABLE) {
+		acp_writel(adata->tdm_fmt, adata->acp5x_base + frmt_val);
+		val = acp_readl(adata->acp5x_base + reg_val);
+		acp_writel(val | 0x2, adata->acp5x_base + reg_val);
+	}
+	acp_writel(1, adata->acp5x_base + ACP_EXTERNAL_INTR_ENB);
+	return 0;
+}
+
+static int acp5x_pcm_suspend(struct device *dev)
+{
+	struct i2s_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp_writel(0, adata->acp5x_base + ACP_EXTERNAL_INTR_ENB);
+	return 0;
+}
+
+static int acp5x_pcm_runtime_resume(struct device *dev)
+{
+	struct i2s_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp_writel(1, adata->acp5x_base + ACP_EXTERNAL_INTR_ENB);
+	return 0;
+}
+
+static const struct dev_pm_ops acp5x_pm_ops = {
+	SET_RUNTIME_PM_OPS(acp5x_pcm_suspend,
+			   acp5x_pcm_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(acp5x_pcm_suspend, acp5x_pcm_resume)
+};
+
 static struct platform_driver acp5x_dma_driver = {
 	.probe = acp5x_audio_probe,
+	.remove = acp5x_audio_remove,
 	.driver = {
 		.name = "acp5x_i2s_dma",
+		.pm = &acp5x_pm_ops,
 	},
 };
 
-- 
2.17.1