ASoC: amd: ps: add pm ops support for SoundWire dma driver

Add support pm ops support for SoundWire dma driver.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20230612095903.2113464-7-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/amd/ps/ps-sdw-dma.c b/sound/soc/amd/ps/ps-sdw-dma.c
index 1de7894..ade130a 100644 (file)
--- 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"
 
@@ -102,6 +103,29 @@ 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;
+       u32 irq_mask = ACP_SDW_DMA_IRQ_MASK;
+       u32 irq_mask1 = ACP_P1_SDW_DMA_IRQ_MASK;
+
+       if (enable) {
+               ext_intr_cntl = readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+               ext_intr_cntl |= irq_mask;
+               writel(ext_intr_cntl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+               ext_intr_cntl1 = readl(acp_base + ACP_EXTERNAL_INTR_CNTL1);
+               ext_intr_cntl1 |= irq_mask1;
+               writel(ext_intr_cntl1, acp_base + ACP_EXTERNAL_INTR_CNTL1);
+       } else {
+               ext_intr_cntl = readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+               ext_intr_cntl &= ~irq_mask;
+               writel(ext_intr_cntl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+               ext_intr_cntl1 = readl(acp_base + ACP_EXTERNAL_INTR_CNTL1);
+               ext_intr_cntl1 &= ~irq_mask1;
+               writel(ext_intr_cntl1, acp_base + ACP_EXTERNAL_INTR_CNTL1);
+       }
+}
+
 static void acp63_config_dma(struct acp_sdw_dma_stream *stream, void __iomem *acp_base,
                             u32 stream_id)
 {
@@ -440,16 +464,86 @@ static int acp63_sdw_platform_probe(struct platform_device *pdev)
        status = devm_snd_soc_register_component(&pdev->dev,
                                                 &acp63_sdw_component,
                                                 NULL, 0);
-       if (status)
+       if (status) {
                dev_err(&pdev->dev, "Fail to register sdw dma component\n");
+               return status;
+       }
+       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;
+}
 
-       return status;
+static int acp63_sdw_platform_remove(struct platform_device *pdev)
+{
+       pm_runtime_disable(&pdev->dev);
+       return 0;
 }
 
+static int acp_restore_sdw_dma_config(struct sdw_dma_dev_data *sdw_data)
+{
+       struct acp_sdw_dma_stream *stream;
+       struct snd_pcm_substream *substream;
+       struct snd_pcm_runtime *runtime;
+       u32 period_bytes, buf_size, water_mark_size_reg;
+       u32 stream_count;
+       int index, instance, ret;
+
+       for (instance = 0; instance < AMD_SDW_MAX_MANAGERS; instance++) {
+               if (instance == ACP_SDW0)
+                       stream_count = ACP63_SDW0_DMA_MAX_STREAMS;
+               else
+                       stream_count = ACP63_SDW1_DMA_MAX_STREAMS;
+
+               for (index = 0; index < stream_count; index++) {
+                       if (instance == ACP_SDW0) {
+                               substream = sdw_data->sdw0_dma_stream[index];
+                               water_mark_size_reg =
+                                               sdw0_dma_ring_buf_reg[index].water_mark_size_reg;
+                       } else {
+                               substream = sdw_data->sdw1_dma_stream[index];
+                               water_mark_size_reg =
+                                               sdw1_dma_ring_buf_reg[index].water_mark_size_reg;
+                       }
+
+                       if (substream && substream->runtime) {
+                               runtime = substream->runtime;
+                               stream = runtime->private_data;
+                               period_bytes = frames_to_bytes(runtime, runtime->period_size);
+                               buf_size = frames_to_bytes(runtime, runtime->buffer_size);
+                               acp63_config_dma(stream, sdw_data->acp_base, index);
+                               ret = acp63_configure_sdw_ringbuffer(sdw_data->acp_base, index,
+                                                                    buf_size, instance);
+                               if (ret)
+                                       return ret;
+                               writel(period_bytes, sdw_data->acp_base + water_mark_size_reg);
+                       }
+               }
+       }
+       acp63_enable_disable_sdw_dma_interrupts(sdw_data->acp_base, true);
+       return 0;
+}
+
+static int __maybe_unused acp63_sdw_pcm_resume(struct device *dev)
+{
+       struct sdw_dma_dev_data *sdw_data;
+
+       sdw_data = dev_get_drvdata(dev);
+       return acp_restore_sdw_dma_config(sdw_data);
+}
+
+static const struct dev_pm_ops acp63_pm_ops = {
+       SET_SYSTEM_SLEEP_PM_OPS(NULL, acp63_sdw_pcm_resume)
+};
+
 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,
        },
 };