On 6/6/23 01:07, Vijendar Mukunda wrote:
> Add support pm ops support for SoundWire dma driver.
>
> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
> ---
> sound/soc/amd/ps/ps-sdw-dma.c | 98 ++++++++++++++++++++++++++++++++++-
> 1 file changed, 96 insertions(+), 2 deletions(-)
>
> diff --git a/sound/soc/amd/ps/ps-sdw-dma.c b/sound/soc/amd/ps/ps-sdw-dma.c
> index 06d847c6a50e..118f4c3674ab 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 +488,86 @@ 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) {
can this be false?
> + 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,
> },
> };
>
