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![Takashi Iwai](/assets/img/avatar_default.png)
Now with the recent addition of WC buffer allocation support, we can use the standard PCM buffer allocation helpers for pxa2xx drivers. This allows us to remove lots of superfluous code. Cc: Daniel Mack <daniel@zonque.org> Cc: Haojian Zhuang <haojian.zhuang@gmail.com> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20210802072815.13551-6-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
195 lines
5.1 KiB
C
195 lines
5.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmaengine.h>
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#include <linux/dma/pxa-dma.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/pxa2xx-lib.h>
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#include <sound/dmaengine_pcm.h>
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static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
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.info = SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_PAUSE |
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SNDRV_PCM_INFO_RESUME,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_LE |
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SNDRV_PCM_FMTBIT_S32_LE,
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.period_bytes_min = 32,
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.period_bytes_max = 8192 - 32,
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.periods_min = 1,
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.periods_max = 256,
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.buffer_bytes_max = 128 * 1024,
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.fifo_size = 32,
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};
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int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_dmaengine_dai_dma_data *dma_params;
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struct dma_slave_config config;
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int ret;
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dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
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if (!dma_params)
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return 0;
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ret = snd_hwparams_to_dma_slave_config(substream, params, &config);
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if (ret)
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return ret;
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snd_dmaengine_pcm_set_config_from_dai_data(substream,
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snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream),
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&config);
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ret = dmaengine_slave_config(chan, &config);
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if (ret)
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return ret;
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return 0;
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}
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EXPORT_SYMBOL(pxa2xx_pcm_hw_params);
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int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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return snd_dmaengine_pcm_trigger(substream, cmd);
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}
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EXPORT_SYMBOL(pxa2xx_pcm_trigger);
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snd_pcm_uframes_t
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pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
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{
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return snd_dmaengine_pcm_pointer(substream);
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}
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EXPORT_SYMBOL(pxa2xx_pcm_pointer);
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int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
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{
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return 0;
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}
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EXPORT_SYMBOL(pxa2xx_pcm_prepare);
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int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_dmaengine_dai_dma_data *dma_params;
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int ret;
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runtime->hw = pxa2xx_pcm_hardware;
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dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
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if (!dma_params)
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return 0;
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/*
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* For mysterious reasons (and despite what the manual says)
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* playback samples are lost if the DMA count is not a multiple
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* of the DMA burst size. Let's add a rule to enforce that.
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*/
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ret = snd_pcm_hw_constraint_step(runtime, 0,
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SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
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if (ret)
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return ret;
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ret = snd_pcm_hw_constraint_step(runtime, 0,
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SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
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if (ret)
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return ret;
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ret = snd_pcm_hw_constraint_integer(runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (ret < 0)
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return ret;
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return snd_dmaengine_pcm_open(
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substream, dma_request_slave_channel(asoc_rtd_to_cpu(rtd, 0)->dev,
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dma_params->chan_name));
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}
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EXPORT_SYMBOL(pxa2xx_pcm_open);
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int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
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{
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return snd_dmaengine_pcm_close_release_chan(substream);
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}
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EXPORT_SYMBOL(pxa2xx_pcm_close);
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int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm)
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{
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size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
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return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC,
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pcm->card->dev, size);
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}
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EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer);
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int pxa2xx_soc_pcm_new(struct snd_soc_component *component,
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struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_card *card = rtd->card->snd_card;
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struct snd_pcm *pcm = rtd->pcm;
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int ret;
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ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
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if (ret)
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return ret;
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return pxa2xx_pcm_preallocate_dma_buffer(pcm);
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}
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EXPORT_SYMBOL(pxa2xx_soc_pcm_new);
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int pxa2xx_soc_pcm_open(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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return pxa2xx_pcm_open(substream);
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}
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EXPORT_SYMBOL(pxa2xx_soc_pcm_open);
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int pxa2xx_soc_pcm_close(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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return pxa2xx_pcm_close(substream);
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}
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EXPORT_SYMBOL(pxa2xx_soc_pcm_close);
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int pxa2xx_soc_pcm_hw_params(struct snd_soc_component *component,
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struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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return pxa2xx_pcm_hw_params(substream, params);
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}
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EXPORT_SYMBOL(pxa2xx_soc_pcm_hw_params);
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int pxa2xx_soc_pcm_prepare(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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return pxa2xx_pcm_prepare(substream);
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}
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EXPORT_SYMBOL(pxa2xx_soc_pcm_prepare);
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int pxa2xx_soc_pcm_trigger(struct snd_soc_component *component,
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struct snd_pcm_substream *substream, int cmd)
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{
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return pxa2xx_pcm_trigger(substream, cmd);
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}
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EXPORT_SYMBOL(pxa2xx_soc_pcm_trigger);
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snd_pcm_uframes_t
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pxa2xx_soc_pcm_pointer(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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return pxa2xx_pcm_pointer(substream);
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}
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EXPORT_SYMBOL(pxa2xx_soc_pcm_pointer);
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MODULE_AUTHOR("Nicolas Pitre");
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MODULE_DESCRIPTION("Intel PXA2xx sound library");
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MODULE_LICENSE("GPL");
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