ASoC: xilinx: Use managed buffer allocation

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

Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20191210142614.19405-16-tiwai@suse.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/xilinx/xlnx_formatter_pcm.c

@@ -426,7 +426,6 @@ static int xlnx_formatter_pcm_hw_params(struct snd_soc_component *component,
 {
 	u32 low, high, active_ch, val, bytes_per_ch, bits_per_sample;
 	u32 aes_reg1_val, aes_reg2_val;
-	int status;
 	u64 size;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct xlnx_pcm_stream_param *stream_data = runtime->private_data;
@@ -450,9 +449,6 @@ static int xlnx_formatter_pcm_hw_params(struct snd_soc_component *component,
 	}
 
 	size = params_buffer_bytes(params);
-	status = snd_pcm_lib_malloc_pages(substream, size);
-	if (status < 0)
-		return status;
 
 	stream_data->buffer_size = size;
 
@@ -495,12 +491,6 @@ static int xlnx_formatter_pcm_hw_params(struct snd_soc_component *component,
 	return 0;
 }
 
-static int xlnx_formatter_pcm_hw_free(struct snd_soc_component *component,
-				      struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
-}
-
 static int xlnx_formatter_pcm_trigger(struct snd_soc_component *component,
 				      struct snd_pcm_substream *substream,
 				      int cmd)
@@ -532,7 +522,7 @@ static int xlnx_formatter_pcm_trigger(struct snd_soc_component *component,
 static int xlnx_formatter_pcm_new(struct snd_soc_component *component,
 				  struct snd_soc_pcm_runtime *rtd)
 {
-	snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
+	snd_pcm_set_managed_buffer_all(rtd->pcm,
 			SNDRV_DMA_TYPE_DEV, component->dev,
 			xlnx_pcm_hardware.buffer_bytes_max,
 			xlnx_pcm_hardware.buffer_bytes_max);
@@ -544,7 +534,6 @@ static const struct snd_soc_component_driver xlnx_asoc_component = {
 	.open		= xlnx_formatter_pcm_open,
 	.close		= xlnx_formatter_pcm_close,
 	.hw_params	= xlnx_formatter_pcm_hw_params,
-	.hw_free	= xlnx_formatter_pcm_hw_free,
 	.trigger	= xlnx_formatter_pcm_trigger,
 	.pointer	= xlnx_formatter_pcm_pointer,
 	.pcm_construct	= xlnx_formatter_pcm_new,