ASoC: dwc: 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.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20191210142614.19405-4-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/dwc/dwc-pcm.c b/sound/soc/dwc/dwc-pcm.c
index bf36c1d..4b25aca 100644 (file)
--- a/sound/soc/dwc/dwc-pcm.c
+++ b/sound/soc/dwc/dwc-pcm.c
@@ -162,7 +162,6 @@ static int dw_pcm_hw_params(struct snd_soc_component *component,
 {
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct dw_i2s_dev *dev = runtime->private_data;
-       int ret;
 
        switch (params_channels(hw_params)) {
        case 2:
@@ -187,18 +186,7 @@ static int dw_pcm_hw_params(struct snd_soc_component *component,
                return -EINVAL;
        }
 
-       ret = snd_pcm_lib_malloc_pages(substream,
-                       params_buffer_bytes(hw_params));
-       if (ret < 0)
-               return ret;
-       else
-               return 0;
-}
-
-static int dw_pcm_hw_free(struct snd_soc_component *component,
-                         struct snd_pcm_substream *substream)
-{
-       return snd_pcm_lib_free_pages(substream);
+       return 0;
 }
 
 static int dw_pcm_trigger(struct snd_soc_component *component,
@@ -256,27 +244,19 @@ static int dw_pcm_new(struct snd_soc_component *component,
 {
        size_t size = dw_pcm_hardware.buffer_bytes_max;
 
-       snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
+       snd_pcm_set_managed_buffer_all(rtd->pcm,
                        SNDRV_DMA_TYPE_CONTINUOUS,
                        NULL, size, size);
        return 0;
 }
 
-static void dw_pcm_free(struct snd_soc_component *component,
-                       struct snd_pcm *pcm)
-{
-       snd_pcm_lib_preallocate_free_for_all(pcm);
-}
-
 static const struct snd_soc_component_driver dw_pcm_component = {
        .open           = dw_pcm_open,
        .close          = dw_pcm_close,
        .hw_params      = dw_pcm_hw_params,
-       .hw_free        = dw_pcm_hw_free,
        .trigger        = dw_pcm_trigger,
        .pointer        = dw_pcm_pointer,
        .pcm_construct  = dw_pcm_new,
-       .pcm_destruct   = dw_pcm_free,
 };
 
 int dw_pcm_register(struct platform_device *pdev)