ASoC: stm32: Use managed buffer allocation

Clean up the drivers with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped, as well as the superfluous
snd_pcm_lib_preallocate_free_for_all() call.  As of the result,
hw_free and pcm_destruct ops became empty and got removed.

Cc: Olivier Moysan <olivier.moysan@st.com>
Cc: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20191210142614.19405-13-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/stm/stm32_adfsdm.c b/sound/soc/stm/stm32_adfsdm.c
index 81c407d..807fee1 100644 (file)
--- a/sound/soc/stm/stm32_adfsdm.c
+++ b/sound/soc/stm/stm32_adfsdm.c
@@ -252,7 +252,6 @@ static int stm32_adfsdm_pcm_close(struct snd_soc_component *component,
        struct stm32_adfsdm_priv *priv =
                snd_soc_dai_get_drvdata(rtd->cpu_dai);
 
-       snd_pcm_lib_free_pages(substream);
        priv->substream = NULL;
 
        return 0;
@@ -276,25 +275,13 @@ static int stm32_adfsdm_pcm_hw_params(struct snd_soc_component *component,
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
        struct stm32_adfsdm_priv *priv =
                snd_soc_dai_get_drvdata(rtd->cpu_dai);
-       int ret;
 
-       ret =  snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
-       if (ret < 0)
-               return ret;
        priv->pcm_buff = substream->runtime->dma_area;
 
        return iio_channel_cb_set_buffer_watermark(priv->iio_cb,
                                                   params_period_size(params));
 }
 
-static int stm32_adfsdm_pcm_hw_free(struct snd_soc_component *component,
-                                   struct snd_pcm_substream *substream)
-{
-       snd_pcm_lib_free_pages(substream);
-
-       return 0;
-}
-
 static int stm32_adfsdm_pcm_new(struct snd_soc_component *component,
                                struct snd_soc_pcm_runtime *rtd)
 {
@@ -303,30 +290,18 @@ static int stm32_adfsdm_pcm_new(struct snd_soc_component *component,
                snd_soc_dai_get_drvdata(rtd->cpu_dai);
        unsigned int size = DFSDM_MAX_PERIODS * DFSDM_MAX_PERIOD_SIZE;
 
-       snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
-                                             priv->dev, size, size);
+       snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
+                                      priv->dev, size, size);
        return 0;
 }
 
-static void stm32_adfsdm_pcm_free(struct snd_soc_component *component,
-                                 struct snd_pcm *pcm)
-{
-       struct snd_pcm_substream *substream;
-
-       substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
-       if (substream)
-               snd_pcm_lib_preallocate_free_for_all(pcm);
-}
-
 static struct snd_soc_component_driver stm32_adfsdm_soc_platform = {
        .open           = stm32_adfsdm_pcm_open,
        .close          = stm32_adfsdm_pcm_close,
        .hw_params      = stm32_adfsdm_pcm_hw_params,
-       .hw_free        = stm32_adfsdm_pcm_hw_free,
        .trigger        = stm32_adfsdm_trigger,
        .pointer        = stm32_adfsdm_pcm_pointer,
        .pcm_construct  = stm32_adfsdm_pcm_new,
-       .pcm_destruct   = stm32_adfsdm_pcm_free,
 };
 
 static const struct of_device_id stm32_adfsdm_of_match[] = {