On 1/11/23 03:02, 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 | 72 +++++++++++++++++++++++++++++++++++
> 2 files changed, 77 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 0bd9dc363461..b462320fdf2a 100644
> --- a/sound/soc/amd/ps/acp63.h
> +++ b/sound/soc/amd/ps/acp63.h
> @@ -135,3 +135,8 @@ struct acp63_dev_data {
> bool is_sdw_dev;
> bool acp_sdw_power_off;
> };
> +
> +struct sdw_dma_dev_data {
> + void __iomem *acp_base;
> + struct mutex *acp_lock;
> +};
> 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..388a4b7df715
> --- /dev/null
> +++ b/sound/soc/amd/ps/ps-sdw-dma.c
> @@ -0,0 +1,72 @@
> +// 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 acp pdm dai\n");
not sure what this means? Are you registering a PDM component or a DMA one?
> +
> + return -ENODEV;
> + }
> + 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 v2");
> +MODULE_ALIAS("platform:" DRV_NAME);
