On 5/16/23 05:35, Vijendar Mukunda wrote: > Soundwire DMA platform driver binds to the platform device created by > ACP PCI device. Soundwire DMA driver registers ALSA DMA component > with ASoC framework. > > Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx> > --- > sound/soc/amd/ps/acp63.h | 5 +++ > sound/soc/amd/ps/ps-sdw-dma.c | 71 +++++++++++++++++++++++++++++++++++ > 2 files changed, 76 insertions(+) > create mode 100644 sound/soc/amd/ps/ps-sdw-dma.c > > diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h > index faf7be4d77c2..f86c60cd1565 100644 > --- a/sound/soc/amd/ps/acp63.h > +++ b/sound/soc/amd/ps/acp63.h > @@ -111,6 +111,11 @@ struct pdm_dev_data { > struct snd_pcm_substream *capture_stream; > }; > > +struct sdw_dma_dev_data { > + void __iomem *acp_base; > + struct mutex *acp_lock; /* used to protect acp common register access */ > +}; > + > /** > * struct acp63_dev_data - acp pci driver context > * @acp63_base: acp mmio base > diff --git a/sound/soc/amd/ps/ps-sdw-dma.c b/sound/soc/amd/ps/ps-sdw-dma.c > new file mode 100644 > index 000000000000..0d0889842413 > --- /dev/null > +++ b/sound/soc/amd/ps/ps-sdw-dma.c > @@ -0,0 +1,71 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * AMD ALSA SoC Pink Sardine Soundwire DMA Driver > + * > + * Copyright 2023 Advanced Micro Devices, Inc. > + */ > + > +#include <linux/err.h> > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <sound/pcm_params.h> > +#include <sound/soc.h> > +#include <sound/soc-dai.h> > +#include "acp63.h" > + > +#define DRV_NAME "amd_ps_sdw_dma" > + > +static const struct snd_soc_component_driver acp63_sdw_component = { > + .name = DRV_NAME, > +}; > + > +static int acp63_sdw_platform_probe(struct platform_device *pdev) > +{ > + struct resource *res; > + struct sdw_dma_dev_data *sdw_data; > + int status; > + > + if (!pdev->dev.platform_data) { > + dev_err(&pdev->dev, "platform_data not retrieved\n"); > + return -ENODEV; > + } > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!res) { > + dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n"); > + return -ENODEV; > + } > + > + sdw_data = devm_kzalloc(&pdev->dev, sizeof(*sdw_data), GFP_KERNEL); > + if (!sdw_data) > + return -ENOMEM; > + > + sdw_data->acp_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); > + if (!sdw_data->acp_base) > + return -ENOMEM; > + > + sdw_data->acp_lock = pdev->dev.platform_data; > + dev_set_drvdata(&pdev->dev, sdw_data); > + status = devm_snd_soc_register_component(&pdev->dev, > + &acp63_sdw_component, > + NULL, 0); > + if (status) { > + dev_err(&pdev->dev, "Fail to register sdw dma component\n"); > + return -ENODEV; return status; > + } > + return 0; > +} > + > +static struct platform_driver acp63_sdw_dma_driver = { > + .probe = acp63_sdw_platform_probe, > + .driver = { > + .name = "amd_ps_sdw_dma", > + }, > +}; > + > +module_platform_driver(acp63_sdw_dma_driver); > + > +MODULE_AUTHOR("Vijendar.Mukunda@xxxxxxx"); > +MODULE_DESCRIPTION("AMD ACP6.3 PS SDW DMA Driver"); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:" DRV_NAME);