ASoC: tegra: Use generic dmaengine PCM

Use the generic dmaengine PCM driver instead of a custom implementation.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/tegra/Kconfig b/sound/soc/tegra/Kconfig
index dbc27ce..b1c9d57 100644 (file)
--- a/sound/soc/tegra/Kconfig
+++ b/sound/soc/tegra/Kconfig
@@ -2,7 +2,7 @@ config SND_SOC_TEGRA
        tristate "SoC Audio for the Tegra System-on-Chip"
        depends on ARCH_TEGRA && TEGRA20_APB_DMA
        select REGMAP_MMIO
-       select SND_SOC_DMAENGINE_PCM if TEGRA20_APB_DMA
+       select SND_SOC_GENERIC_DMAENGINE_PCM if TEGRA20_APB_DMA
        help
          Say Y or M here if you want support for SoC audio on Tegra.
 

diff --git a/sound/soc/tegra/tegra_pcm.c b/sound/soc/tegra/tegra_pcm.c
index f9f247c..f056f63 100644 (file)
--- a/sound/soc/tegra/tegra_pcm.c
+++ b/sound/soc/tegra/tegra_pcm.c
@@ -29,9 +29,7 @@
  *
  */
 
-#include <linux/dma-mapping.h>
 #include <linux/module.h>
-#include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -55,175 +53,24 @@ static const struct snd_pcm_hardware tegra_pcm_hardware = {
        .fifo_size              = 4,
 };
 
-static int tegra_pcm_open(struct snd_pcm_substream *substream)
-{
-       struct snd_soc_pcm_runtime *rtd = substream->private_data;
-       struct device *dev = rtd->platform->dev;
-       int ret;
-
-       /* Set HW params now that initialization is complete */
-       snd_soc_set_runtime_hwparams(substream, &tegra_pcm_hardware);
-
-       ret = snd_dmaengine_pcm_open_request_chan(substream, NULL, NULL);
-       if (ret) {
-               dev_err(dev, "dmaengine pcm open failed with err %d\n", ret);
-               return ret;
-       }
-
-       return 0;
-}
-
-static int tegra_pcm_hw_params(struct snd_pcm_substream *substream,
-                               struct snd_pcm_hw_params *params)
-{
-       struct snd_soc_pcm_runtime *rtd = substream->private_data;
-       struct device *dev = rtd->platform->dev;
-       struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
-       struct dma_slave_config slave_config;
-       int ret;
-
-       ret = snd_hwparams_to_dma_slave_config(substream, params,
-                                               &slave_config);
-       if (ret) {
-               dev_err(dev, "hw params config failed with err %d\n", ret);
-               return ret;
-       }
-
-       snd_dmaengine_pcm_set_config_from_dai_data(substream,
-                       snd_soc_dai_get_dma_data(rtd->cpu_dai, substream),
-                       &slave_config);
-
-       ret = dmaengine_slave_config(chan, &slave_config);
-       if (ret < 0) {
-               dev_err(dev, "dma slave config failed with err %d\n", ret);
-               return ret;
-       }
-
-       snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
-       return 0;
-}
-
-static int tegra_pcm_hw_free(struct snd_pcm_substream *substream)
-{
-       snd_pcm_set_runtime_buffer(substream, NULL);
-       return 0;
-}
-
-static int tegra_pcm_mmap(struct snd_pcm_substream *substream,
-                               struct vm_area_struct *vma)
-{
-       struct snd_pcm_runtime *runtime = substream->runtime;
-
-       return dma_mmap_writecombine(substream->pcm->card->dev, vma,
-                                       runtime->dma_area,
-                                       runtime->dma_addr,
-                                       runtime->dma_bytes);
-}
-
-static struct snd_pcm_ops tegra_pcm_ops = {
-       .open           = tegra_pcm_open,
-       .close          = snd_dmaengine_pcm_close_release_chan,
-       .ioctl          = snd_pcm_lib_ioctl,
-       .hw_params      = tegra_pcm_hw_params,
-       .hw_free        = tegra_pcm_hw_free,
-       .trigger        = snd_dmaengine_pcm_trigger,
-       .pointer        = snd_dmaengine_pcm_pointer,
-       .mmap           = tegra_pcm_mmap,
-};
-
-static int tegra_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
-{
-       struct snd_pcm_substream *substream = pcm->streams[stream].substream;
-       struct snd_dma_buffer *buf = &substream->dma_buffer;
-       size_t size = tegra_pcm_hardware.buffer_bytes_max;
-
-       buf->area = dma_alloc_writecombine(pcm->card->dev, size,
-                                               &buf->addr, GFP_KERNEL);
-       if (!buf->area)
-               return -ENOMEM;
-
-       buf->dev.type = SNDRV_DMA_TYPE_DEV;
-       buf->dev.dev = pcm->card->dev;
-       buf->private_data = NULL;
-       buf->bytes = size;
-
-       return 0;
-}
-
-static void tegra_pcm_deallocate_dma_buffer(struct snd_pcm *pcm, int stream)
-{
-       struct snd_pcm_substream *substream;
-       struct snd_dma_buffer *buf;
-
-       substream = pcm->streams[stream].substream;
-       if (!substream)
-               return;
-
-       buf = &substream->dma_buffer;
-       if (!buf->area)
-               return;
-
-       dma_free_writecombine(pcm->card->dev, buf->bytes,
-                               buf->area, buf->addr);
-       buf->area = NULL;
-}
-
-static u64 tegra_dma_mask = DMA_BIT_MASK(32);
-
-static int tegra_pcm_new(struct snd_soc_pcm_runtime *rtd)
-{
-       struct snd_card *card = rtd->card->snd_card;
-       struct snd_pcm *pcm = rtd->pcm;
-       int ret = 0;
-
-       if (!card->dev->dma_mask)
-               card->dev->dma_mask = &tegra_dma_mask;
-       if (!card->dev->coherent_dma_mask)
-               card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
-
-       if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
-               ret = tegra_pcm_preallocate_dma_buffer(pcm,
-                                               SNDRV_PCM_STREAM_PLAYBACK);
-               if (ret)
-                       goto err;
-       }
-
-       if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
-               ret = tegra_pcm_preallocate_dma_buffer(pcm,
-                                               SNDRV_PCM_STREAM_CAPTURE);
-               if (ret)
-                       goto err_free_play;
-       }
-
-       return 0;
-
-err_free_play:
-       tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);
-err:
-       return ret;
-}
-
-static void tegra_pcm_free(struct snd_pcm *pcm)
-{
-       tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_CAPTURE);
-       tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);
-}
-
-static struct snd_soc_platform_driver tegra_pcm_platform = {
-       .ops            = &tegra_pcm_ops,
-       .pcm_new        = tegra_pcm_new,
-       .pcm_free       = tegra_pcm_free,
+static const struct snd_dmaengine_pcm_config tegra_dmaengine_pcm_config = {
+       .pcm_hardware = &tegra_pcm_hardware,
+       .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+       .compat_filter_fn = NULL,
+       .prealloc_buffer_size = PAGE_SIZE * 8,
 };
 
 int tegra_pcm_platform_register(struct device *dev)
 {
-       return snd_soc_register_platform(dev, &tegra_pcm_platform);
+       return snd_dmaengine_pcm_register(dev, &tegra_dmaengine_pcm_config,
+                       SND_DMAENGINE_PCM_FLAG_NO_DT |
+                       SND_DMAENGINE_PCM_FLAG_COMPAT);
 }
 EXPORT_SYMBOL_GPL(tegra_pcm_platform_register);
 
 void tegra_pcm_platform_unregister(struct device *dev)
 {
-       snd_soc_unregister_platform(dev);
+       return snd_dmaengine_pcm_unregister(dev);
 }
 EXPORT_SYMBOL_GPL(tegra_pcm_platform_unregister);