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https://github.com/torvalds/linux
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312bb4f626
Currently the imx_dma_data struct, which gets passed to the dmaengine driver, is allocated and constructed in the pcm driver from the data stored in the dma_params struct. The dma_params struct gets passed to the pcm driver from the dai driver. Instead of going this route of indirection embed the dma_data struct directly into the dma_params struct and let the dai driver fill it in. This allows us to simplify the imx-pcm-dma driver quite a bit, since it doesn't have care about memory managing the imx_dma_data struct anymore. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/*
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* Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
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*
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* This code is based on code copyrighted by Freescale,
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* Liam Girdwood, Javier Martin and probably others.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef _IMX_PCM_H
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#define _IMX_PCM_H
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#include <linux/platform_data/dma-imx.h>
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/*
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* Do not change this as the FIQ handler depends on this size
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*/
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#define IMX_SSI_DMABUF_SIZE (64 * 1024)
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struct imx_pcm_dma_params {
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unsigned long dma_addr;
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int burstsize;
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struct imx_dma_data dma_data;
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};
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static inline void
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imx_pcm_dma_params_init_data(struct imx_pcm_dma_params *params,
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int dma, bool shared)
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{
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params->dma_data.dma_request = dma;
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params->dma_data.priority = DMA_PRIO_HIGH;
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if (shared)
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params->dma_data.peripheral_type = IMX_DMATYPE_SSI_SP;
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else
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params->dma_data.peripheral_type = IMX_DMATYPE_SSI;
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}
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int snd_imx_pcm_mmap(struct snd_pcm_substream *substream,
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struct vm_area_struct *vma);
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int imx_pcm_new(struct snd_soc_pcm_runtime *rtd);
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void imx_pcm_free(struct snd_pcm *pcm);
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#ifdef CONFIG_SND_SOC_IMX_PCM_DMA
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int imx_pcm_dma_init(struct platform_device *pdev);
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#else
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static inline int imx_pcm_dma_init(struct platform_device *pdev)
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{
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return -ENODEV;
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}
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#endif
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#ifdef CONFIG_SND_SOC_IMX_PCM_FIQ
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int imx_pcm_fiq_init(struct platform_device *pdev);
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#else
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static inline int imx_pcm_fiq_init(struct platform_device *pdev)
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{
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return -ENODEV;
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}
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#endif
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#endif /* _IMX_PCM_H */
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