[PATCH V2 6/9] ASoC: amd: ps: add pm ops support for SoundWire dma driver

Vijendar Mukunda
2023-05-22T13:27:27Z

Add support pm ops support for SoundWire dma driver.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
---
sound/soc/amd/ps/ps-sdw-dma.c | 91 ++++++++++++++++++++++++++++++++++-
1 file changed, 89 insertions(+), 2 deletions(-)

diff --git a/sound/soc/amd/ps/ps-sdw-dma.c b/sound/soc/amd/ps/ps-sdw-dma.c
index be68003cbd67..54cf971589c0 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"

@@ -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)
{
@@ -464,16 +488,79 @@ 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_enable(&pdev->dev);
+ pm_runtime_allow(&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 __maybe_unused acp63_sdw_pcm_resume(struct device *dev)
+{
+ struct sdw_dma_dev_data *sdw_data;
+ struct acp_sdw_dma_stream *stream;
+ struct snd_pcm_runtime *runtime;
+ u32 period_bytes, buf_size, water_mark_size_reg;
+ int ret;
+ int index;
+
+ sdw_data = dev_get_drvdata(dev);
+ for (index = 0; index < ACP63_SDW0_DMA_MAX_STREAMS; index++) {
+ if (sdw_data->sdw0_dma_stream[index] &&
+ sdw_data->sdw0_dma_stream[index]->runtime) {
+ water_mark_size_reg = sdw0_dma_ring_buf_reg[index].water_mark_size_reg;
+ runtime = sdw_data->sdw0_dma_stream[index]->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, ACP_SDW0);
+ if (ret)
+ return ret;
+ writel(period_bytes, sdw_data->acp_base + water_mark_size_reg);
+ }
+ }
+ for (index = 0; index < ACP63_SDW1_DMA_MAX_STREAMS; index++) {
+ if (sdw_data->sdw1_dma_stream[index] &&
+ sdw_data->sdw1_dma_stream[index]->runtime) {
+ water_mark_size_reg = sdw1_dma_ring_buf_reg[index].water_mark_size_reg;
+ runtime = sdw_data->sdw1_dma_stream[index]->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, ACP_SDW1);
+ 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 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,
},
};

--
2.34.1