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70d435ba1c
The generic snd_dmaengine_pcm is able to retrieve all the needed information from the attached dmaengine and is in fact able to provide much more accurate flags to userspace, like the SDMA engine being only able to operate in batch mode. To avoid any future inconsistencies between the dmaengine and the pcm_config, rip out the fixed config and rely on the core to fill in the right flags derived from the dmaengine information. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
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* imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer
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*
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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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#include <linux/platform_device.h>
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#include <linux/dmaengine.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/dmaengine_pcm.h>
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#include "imx-pcm.h"
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static bool filter(struct dma_chan *chan, void *param)
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{
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if (!imx_dma_is_general_purpose(chan))
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return false;
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chan->private = param;
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return true;
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}
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static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = {
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.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
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.compat_filter_fn = filter,
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};
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int imx_pcm_dma_init(struct platform_device *pdev, size_t size)
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{
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struct snd_dmaengine_pcm_config *config;
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config = devm_kzalloc(&pdev->dev,
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sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL);
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if (!config)
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return -ENOMEM;
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*config = imx_dmaengine_pcm_config;
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return devm_snd_dmaengine_pcm_register(&pdev->dev,
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config,
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SND_DMAENGINE_PCM_FLAG_COMPAT);
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}
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EXPORT_SYMBOL_GPL(imx_pcm_dma_init);
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MODULE_LICENSE("GPL");
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