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From:   Vijendar Mukunda <Vijendar.Mukunda@amd.com>
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        <alsa-devel@alsa-project.org>
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        <Mario.Limonciello@amd.com>, <Mastan.Katragadda@amd.com>,
        <arungopal.kondaveeti@amd.com>,
        Vijendar Mukunda <Vijendar.Mukunda@amd.com>,
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        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        open list <linux-kernel@vger.kernel.org>
Subject: [PATCH 13/19] ASoC: amd: ps: add support for runtime pm ops for soundwire dma driver
Date:   Wed, 11 Jan 2023 14:32:16 +0530
Message-ID: <20230111090222.2016499-14-Vijendar.Mukunda@amd.com>
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Add support for runtime pm ops for soundwire dma driver.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
---
 sound/soc/amd/ps/ps-sdw-dma.c | 66 +++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/sound/soc/amd/ps/ps-sdw-dma.c b/sound/soc/amd/ps/ps-sdw-dma.c
index e94f76053c66..960c0bc5e848 100644
--- a/sound/soc/amd/ps/ps-sdw-dma.c
+++ b/sound/soc/amd/ps/ps-sdw-dma.c
@@ -12,6 +12,7 @@
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/soc-dai.h>
+#include <linux/pm_runtime.h>
 #include <linux/soundwire/sdw_amd.h>
 #include "acp63.h"
 
@@ -56,6 +57,30 @@ static const struct snd_pcm_hardware acp63_sdw_hardware_capture = {
 	.periods_max = SDW_CAPTURE_MAX_NUM_PERIODS,
 };
 
+static void acp63_enable_disable_sdw_dma_interrupts(void __iomem *acp_base, bool enable)
+{
+	u32 ext_intr_cntl, ext_intr_cntl1, irq_mask, irq_mask1;
+
+	irq_mask = ACP_SDW_DMA_IRQ_MASK;
+	irq_mask1 = ACP_P1_SDW_DMA_IRQ_MASK;
+
+	if (enable) {
+		ext_intr_cntl = acp63_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+		ext_intr_cntl |= irq_mask;
+		acp63_writel(ext_intr_cntl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+		ext_intr_cntl1 = acp63_readl(acp_base + ACP_EXTERNAL_INTR_CNTL1);
+		ext_intr_cntl1 |= irq_mask1;
+		acp63_writel(ext_intr_cntl1, acp_base + ACP_EXTERNAL_INTR_CNTL1);
+	} else {
+		ext_intr_cntl = acp63_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+		ext_intr_cntl &= ~irq_mask;
+		acp63_writel(ext_intr_cntl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+		ext_intr_cntl1 = acp63_readl(acp_base + ACP_EXTERNAL_INTR_CNTL1);
+		ext_intr_cntl1 &= ~irq_mask1;
+		acp63_writel(ext_intr_cntl1, acp_base + ACP_EXTERNAL_INTR_CNTL1);
+	}
+}
+
 static void acp63_config_dma(struct sdw_stream_instance *sdw_ins, u32 stream_id)
 {
 	u16 page_idx;
@@ -585,13 +610,54 @@ static int acp63_sdw_platform_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 acp63_sdw_platform_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static int __maybe_unused acp63_sdw_pcm_runtime_suspend(struct device *dev)
+{
+	struct sdw_dma_dev_data *sdw_dma_data;
+
+	sdw_dma_data = dev_get_drvdata(dev);
+	mutex_lock(sdw_dma_data->acp_lock);
+	acp63_enable_disable_sdw_dma_interrupts(sdw_dma_data->acp_base, false);
+	mutex_unlock(sdw_dma_data->acp_lock);
+
+	return 0;
+}
+
+static int __maybe_unused acp63_sdw_pcm_runtime_resume(struct device *dev)
+{
+	struct sdw_dma_dev_data *sdw_dma_data;
+
+	sdw_dma_data = dev_get_drvdata(dev);
+	mutex_lock(sdw_dma_data->acp_lock);
+	acp63_enable_disable_sdw_dma_interrupts(sdw_dma_data->acp_base, true);
+	mutex_unlock(sdw_dma_data->acp_lock);
+
 	return 0;
 }
 
+static const struct dev_pm_ops acp63_pm_ops = {
+	SET_RUNTIME_PM_OPS(acp63_sdw_pcm_runtime_suspend,
+			   acp63_sdw_pcm_runtime_resume, NULL)
+};
+
 static struct platform_driver acp63_sdw_dma_driver = {
 	.probe = acp63_sdw_platform_probe,
+	.remove = acp63_sdw_platform_remove,
 	.driver = {
 		.name = "amd_ps_sdw_dma",
+		.pm = &acp63_pm_ops,
 	},
 };
 
-- 
2.34.1