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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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42a74e7747
The DMA channel names are specified through struct snd_dmaengine_pcm_config rather than using SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME flag when booting with devicetree in order to properly support deferred probing. Without this change the sound machine driver initialization can complete successfully with unavailable DMA resources. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*
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* dmaengine.c - Samsung dmaengine wrapper
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*
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* Author: Mark Brown <broonie@linaro.org>
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* Copyright 2013 Linaro
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/amba/pl08x.h>
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#include <linux/platform_data/dma-s3c24xx.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/dmaengine_pcm.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include "dma.h"
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void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
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struct s3c_dma_params *playback,
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struct s3c_dma_params *capture)
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{
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struct snd_dmaengine_dai_dma_data *playback_data = NULL;
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struct snd_dmaengine_dai_dma_data *capture_data = NULL;
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if (playback) {
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playback_data = &playback->dma_data;
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playback_data->filter_data = playback->slave;
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playback_data->chan_name = playback->ch_name;
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playback_data->addr = playback->dma_addr;
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playback_data->addr_width = playback->dma_size;
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}
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if (capture) {
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capture_data = &capture->dma_data;
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capture_data->filter_data = capture->slave;
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capture_data->chan_name = capture->ch_name;
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capture_data->addr = capture->dma_addr;
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capture_data->addr_width = capture->dma_size;
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}
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snd_soc_dai_init_dma_data(dai, playback_data, capture_data);
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}
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EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data);
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int samsung_asoc_dma_platform_register(struct device *dev, dma_filter_fn filter,
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const char *tx, const char *rx)
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{
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unsigned int flags = SND_DMAENGINE_PCM_FLAG_COMPAT;
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struct snd_dmaengine_pcm_config *pcm_conf;
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pcm_conf = devm_kzalloc(dev, sizeof(*pcm_conf), GFP_KERNEL);
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if (!pcm_conf)
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return -ENOMEM;
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pcm_conf->prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
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pcm_conf->compat_filter_fn = filter;
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if (dev->of_node) {
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pcm_conf->chan_names[SNDRV_PCM_STREAM_PLAYBACK] = tx;
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pcm_conf->chan_names[SNDRV_PCM_STREAM_CAPTURE] = rx;
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} else {
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flags |= SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME;
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}
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return devm_snd_dmaengine_pcm_register(dev, pcm_conf, flags);
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}
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EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
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MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
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MODULE_DESCRIPTION("Samsung dmaengine ASoC driver");
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MODULE_LICENSE("GPL");
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