ALSA: pmac: Use managed buffer allocation

Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.

Link: https://lore.kernel.org/r/20191209094943.14984-59-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/ppc/pmac.c

@@ -107,24 +107,6 @@ static inline int another_stream(int stream)
 		SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 }
 
-/*
- * allocate buffers
- */
-static int snd_pmac_pcm_hw_params(struct snd_pcm_substream *subs,
-				  struct snd_pcm_hw_params *hw_params)
-{
-	return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
-}
-
-/*
- * release buffers
- */
-static int snd_pmac_pcm_hw_free(struct snd_pcm_substream *subs)
-{
-	snd_pcm_lib_free_pages(subs);
-	return 0;
-}
-
 /*
  * get a stream of the opposite direction
  */
@@ -672,8 +654,6 @@ static const struct snd_pcm_ops snd_pmac_playback_ops = {
 	.open =		snd_pmac_playback_open,
 	.close =	snd_pmac_playback_close,
 	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	snd_pmac_pcm_hw_params,
-	.hw_free =	snd_pmac_pcm_hw_free,
 	.prepare =	snd_pmac_playback_prepare,
 	.trigger =	snd_pmac_playback_trigger,
 	.pointer =	snd_pmac_playback_pointer,
@@ -683,8 +663,6 @@ static const struct snd_pcm_ops snd_pmac_capture_ops = {
 	.open =		snd_pmac_capture_open,
 	.close =	snd_pmac_capture_close,
 	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	snd_pmac_pcm_hw_params,
-	.hw_free =	snd_pmac_pcm_hw_free,
 	.prepare =	snd_pmac_capture_prepare,
 	.trigger =	snd_pmac_capture_trigger,
 	.pointer =	snd_pmac_capture_pointer,
@@ -721,7 +699,7 @@ int snd_pmac_pcm_new(struct snd_pmac *chip)
 	chip->capture.cur_freqs = chip->freqs_ok;
 
 	/* preallocate 64k buffer */
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
 				       &chip->pdev->dev,
 				       64 * 1024, 64 * 1024);