ASoC: amd: add ACP PDM DMA driver pm ops

Add ACP PDM DMA driver pm ops.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200518171704.24999-11-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/amd/renoir/acp3x-pdm-dma.c b/sound/soc/amd/renoir/acp3x-pdm-dma.c
index fd19b17f553eb7af5d28131473e423bcd37cf839..942010021319772b9219f317a38ae8c354ac7a87 100644 (file)
--- a/sound/soc/amd/renoir/acp3x-pdm-dma.c
+++ b/sound/soc/amd/renoir/acp3x-pdm-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_params.h>
 #include <sound/soc.h>
 #include <sound/soc-dai.h>
@@ -453,19 +454,71 @@ static int acp_pdm_audio_probe(struct platform_device *pdev)
                dev_err(&pdev->dev, "ACP PDM IRQ request failed\n");
                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 acp_pdm_audio_remove(struct platform_device *pdev)
 {
+       pm_runtime_disable(&pdev->dev);
        return 0;
 }
 
+static int acp_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);
+               config_acp_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
+               init_pdm_ring_buffer(MEM_WINDOW_START, buffer_len, period_bytes,
+                                    adata->acp_base);
+       }
+       enable_pdm_interrupts(adata->acp_base);
+       return 0;
+}
+
+static int acp_pdm_runtime_suspend(struct device *dev)
+{
+       struct pdm_dev_data *adata;
+
+       adata = dev_get_drvdata(dev);
+       disable_pdm_interrupts(adata->acp_base);
+
+       return 0;
+}
+
+static int acp_pdm_runtime_resume(struct device *dev)
+{
+       struct pdm_dev_data *adata;
+
+       adata = dev_get_drvdata(dev);
+       enable_pdm_interrupts(adata->acp_base);
+       return 0;
+}
+
+static const struct dev_pm_ops acp_pdm_pm_ops = {
+       .runtime_suspend = acp_pdm_runtime_suspend,
+       .runtime_resume = acp_pdm_runtime_resume,
+       .resume = acp_pdm_resume,
+};
+
 static struct platform_driver acp_pdm_dma_driver = {
        .probe = acp_pdm_audio_probe,
        .remove = acp_pdm_audio_remove,
        .driver = {
                .name = "acp_rn_pdm_dma",
+               .pm = &acp_pdm_pm_ops,
        },
 };