ASoC: mediatek: 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/20191211172019.23206-1-tiwai@suse.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/mediatek/common/mtk-afe-fe-dai.c

@@ -129,10 +129,6 @@ int mtk_afe_fe_hw_params(struct snd_pcm_substream *substream,
 	unsigned int rate = params_rate(params);
 	snd_pcm_format_t format = params_format(params);
 
-	ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
-	if (ret < 0)
-		return ret;
-
 	if (afe->request_dram_resource)
 		afe->request_dram_resource(afe->dev);
 
@@ -193,7 +189,7 @@ int mtk_afe_fe_hw_free(struct snd_pcm_substream *substream,
 	if (afe->release_dram_resource)
 		afe->release_dram_resource(afe->dev);
 
-	return snd_pcm_lib_free_pages(substream);
+	return 0;
 }
 EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_free);
 

sound/soc/mediatek/common/mtk-afe-platform-driver.c

@@ -120,24 +120,16 @@ int mtk_afe_pcm_new(struct snd_soc_component *component,
 	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
 
 	size = afe->mtk_afe_hardware->buffer_bytes_max;
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
 				       afe->dev, size, size);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(mtk_afe_pcm_new);
 
-void mtk_afe_pcm_free(struct snd_soc_component *component,
-		      struct snd_pcm *pcm)
-{
-	snd_pcm_lib_preallocate_free_for_all(pcm);
-}
-EXPORT_SYMBOL_GPL(mtk_afe_pcm_free);
-
 const struct snd_soc_component_driver mtk_afe_pcm_platform = {
 	.name		= AFE_PCM_NAME,
 	.pointer	= mtk_afe_pcm_pointer,
 	.pcm_construct	= mtk_afe_pcm_new,
-	.pcm_destruct	= mtk_afe_pcm_free,
 };
 EXPORT_SYMBOL_GPL(mtk_afe_pcm_platform);
 

sound/soc/mediatek/common/mtk-afe-platform-driver.h

@@ -21,8 +21,6 @@ snd_pcm_uframes_t mtk_afe_pcm_pointer(struct snd_soc_component *component,
 				      struct snd_pcm_substream *substream);
 int mtk_afe_pcm_new(struct snd_soc_component *component,
 		    struct snd_soc_pcm_runtime *rtd);
-void mtk_afe_pcm_free(struct snd_soc_component *component,
-		      struct snd_pcm *pcm);
 
 int mtk_afe_combine_sub_dai(struct mtk_base_afe *afe);
 int mtk_afe_add_sub_dai_control(struct snd_soc_component *component);

sound/soc/mediatek/mt6797/mt6797-afe-pcm.c

@@ -714,7 +714,6 @@ static const struct snd_soc_component_driver mt6797_afe_component = {
 	.probe		= mt6797_afe_component_probe,
 	.pointer	= mtk_afe_pcm_pointer,
 	.pcm_construct	= mtk_afe_pcm_new,
-	.pcm_destruct	= mtk_afe_pcm_free,
 };
 
 static int mt6797_dai_memif_register(struct mtk_base_afe *afe)

sound/soc/mediatek/mt8183/mt8183-afe-pcm.c

@@ -1052,7 +1052,6 @@ static const struct snd_soc_component_driver mt8183_afe_component = {
 	.probe		= mt8183_afe_component_probe,
 	.pointer	= mtk_afe_pcm_pointer,
 	.pcm_construct	= mtk_afe_pcm_new,
-	.pcm_destruct	= mtk_afe_pcm_free,
 };
 
 static int mt8183_dai_memif_register(struct mtk_base_afe *afe)