ASoC: meson: Use managed DMA buffer allocation

Using a managed buffer will pre-allocate the buffer using
snd_pcm_lib_preallocate_pages() and automatically free it when the PCM is
destroyed.

In addition it will call snd_pcm_lib_malloc_pages() before the driver's
hw_params() callback and snd_pcm_lib_free_pages() after the driver's
hw_free() callback.

This slightly reduces the boilerplate code of the driver.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Tested-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20201218154544.25513-1-lars@metafoo.de
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/meson/aiu-fifo-i2s.c b/sound/soc/meson/aiu-fifo-i2s.c
index d91b0d8..2388a2d 100644 (file)
--- a/sound/soc/meson/aiu-fifo-i2s.c
+++ b/sound/soc/meson/aiu-fifo-i2s.c
@@ -124,7 +124,6 @@ const struct snd_soc_dai_ops aiu_fifo_i2s_dai_ops = {
        .trigger        = aiu_fifo_i2s_trigger,
        .prepare        = aiu_fifo_i2s_prepare,
        .hw_params      = aiu_fifo_i2s_hw_params,
-       .hw_free        = aiu_fifo_hw_free,
        .startup        = aiu_fifo_startup,
        .shutdown       = aiu_fifo_shutdown,
 };

diff --git a/sound/soc/meson/aiu-fifo-spdif.c b/sound/soc/meson/aiu-fifo-spdif.c
index 44eb6fa..2fb30f8 100644 (file)
--- a/sound/soc/meson/aiu-fifo-spdif.c
+++ b/sound/soc/meson/aiu-fifo-spdif.c
@@ -158,7 +158,6 @@ const struct snd_soc_dai_ops aiu_fifo_spdif_dai_ops = {
        .trigger        = fifo_spdif_trigger,
        .prepare        = fifo_spdif_prepare,
        .hw_params      = fifo_spdif_hw_params,
-       .hw_free        = aiu_fifo_hw_free,
        .startup        = aiu_fifo_startup,
        .shutdown       = aiu_fifo_shutdown,
 };

diff --git a/sound/soc/meson/aiu-fifo.c b/sound/soc/meson/aiu-fifo.c
index aa88aae..4ad2326 100644 (file)
--- a/sound/soc/meson/aiu-fifo.c
+++ b/sound/soc/meson/aiu-fifo.c
@@ -99,11 +99,6 @@ int aiu_fifo_hw_params(struct snd_pcm_substream *substream,
        struct snd_soc_component *component = dai->component;
        struct aiu_fifo *fifo = dai->playback_dma_data;
        dma_addr_t end;
-       int ret;
-
-       ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
-       if (ret < 0)
-               return ret;
 
        /* Setup the fifo boundaries */
        end = runtime->dma_addr + runtime->dma_bytes - fifo->fifo_block;
@@ -124,12 +119,6 @@ int aiu_fifo_hw_params(struct snd_pcm_substream *substream,
        return 0;
 }
 
-int aiu_fifo_hw_free(struct snd_pcm_substream *substream,
-                    struct snd_soc_dai *dai)
-{
-       return snd_pcm_lib_free_pages(substream);
-}
-
 static irqreturn_t aiu_fifo_isr(int irq, void *dev_id)
 {
        struct snd_pcm_substream *playback = dev_id;
@@ -187,15 +176,12 @@ void aiu_fifo_shutdown(struct snd_pcm_substream *substream,
 int aiu_fifo_pcm_new(struct snd_soc_pcm_runtime *rtd,
                     struct snd_soc_dai *dai)
 {
-       struct snd_pcm_substream *substream =
-               rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
        struct snd_card *card = rtd->card->snd_card;
        struct aiu_fifo *fifo = dai->playback_dma_data;
        size_t size = fifo->pcm->buffer_bytes_max;
 
-       snd_pcm_lib_preallocate_pages(substream,
-                                     SNDRV_DMA_TYPE_DEV,
-                                     card->dev, size, size);
+       snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
+                                      card->dev, size, size);
 
        return 0;
 }