[PATCH 14/15] ASoC: qcom: qdsp6: Use managed buffer allocation

[Srinivas Kandagatla]

On 02/08/2021 08:28, Takashi Iwai wrote:
> This patch simplifies the buffer pre-allocation code of qcom qdsp6
> driver with the standard managed buffer helper.  It uses the newly
> introduced fixed-size buffer allocation helper.
> 
> Cc: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
> Cc: Banajit Goswami <bgoswami at codeaurora.org>
> Signed-off-by: Takashi Iwai <tiwai at suse.de>

Tested this on DragonBoard DB845c with WSA Playback

Tested-by: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>

> ---
>   sound/soc/qcom/qdsp6/q6asm-dai.c | 63 ++------------------------------
>   1 file changed, 3 insertions(+), 60 deletions(-)
> 
> diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c b/sound/soc/qcom/qdsp6/q6asm-dai.c
> index 5ff56a735419..46f365528d50 100644
> --- a/sound/soc/qcom/qdsp6/q6asm-dai.c
> +++ b/sound/soc/qcom/qdsp6/q6asm-dai.c
> @@ -429,8 +429,6 @@ static int q6asm_dai_open(struct snd_soc_component *component,
>   	else
>   		prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);
>   
> -	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
> -
>   	return 0;
>   }
>   
> @@ -470,18 +468,6 @@ static snd_pcm_uframes_t q6asm_dai_pointer(struct snd_soc_component *component,
>   	return bytes_to_frames(runtime, (prtd->pcm_irq_pos));
>   }
>   
> -static int q6asm_dai_mmap(struct snd_soc_component *component,
> -			  struct snd_pcm_substream *substream,
> -			  struct vm_area_struct *vma)
> -{
> -	struct snd_pcm_runtime *runtime = substream->runtime;
> -	struct device *dev = component->dev;
> -
> -	return dma_mmap_coherent(dev, vma,
> -			runtime->dma_area, runtime->dma_addr,
> -			runtime->dma_bytes);
> -}
> -
>   static int q6asm_dai_hw_params(struct snd_soc_component *component,
>   			       struct snd_pcm_substream *substream,
>   			       struct snd_pcm_hw_params *params)
> @@ -1185,52 +1171,11 @@ static const struct snd_compress_ops q6asm_dai_compress_ops = {
>   static int q6asm_dai_pcm_new(struct snd_soc_component *component,
>   			     struct snd_soc_pcm_runtime *rtd)
>   {
> -	struct snd_pcm_substream *psubstream, *csubstream;
>   	struct snd_pcm *pcm = rtd->pcm;
> -	struct device *dev;
> -	int size, ret;
> -
> -	dev = component->dev;
> -	size = q6asm_dai_hardware_playback.buffer_bytes_max;
> -	psubstream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
> -	if (psubstream) {
> -		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, size,
> -					  &psubstream->dma_buffer);
> -		if (ret) {
> -			dev_err(dev, "Cannot allocate buffer(s)\n");
> -			return ret;
> -		}
> -	}
> +	size_t size = q6asm_dai_hardware_playback.buffer_bytes_max;
>   
> -	csubstream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
> -	if (csubstream) {
> -		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, size,
> -					  &csubstream->dma_buffer);
> -		if (ret) {
> -			dev_err(dev, "Cannot allocate buffer(s)\n");
> -			if (psubstream)
> -				snd_dma_free_pages(&psubstream->dma_buffer);
> -			return ret;
> -		}
> -	}
> -
> -	return 0;
> -}
> -
> -static void q6asm_dai_pcm_free(struct snd_soc_component *component,
> -			       struct snd_pcm *pcm)
> -{
> -	struct snd_pcm_substream *substream;
> -	int i;
> -
> -	for (i = 0; i < ARRAY_SIZE(pcm->streams); i++) {
> -		substream = pcm->streams[i].substream;
> -		if (substream) {
> -			snd_dma_free_pages(&substream->dma_buffer);
> -			substream->dma_buffer.area = NULL;
> -			substream->dma_buffer.addr = 0;
> -		}
> -	}
> +	return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
> +					    component->dev, size);
>   }
>   
>   static const struct snd_soc_dapm_widget q6asm_dapm_widgets[] = {
> @@ -1260,9 +1205,7 @@ static const struct snd_soc_component_driver q6asm_fe_dai_component = {
>   	.prepare	= q6asm_dai_prepare,
>   	.trigger	= q6asm_dai_trigger,
>   	.pointer	= q6asm_dai_pointer,
> -	.mmap		= q6asm_dai_mmap,
>   	.pcm_construct	= q6asm_dai_pcm_new,
> -	.pcm_destruct	= q6asm_dai_pcm_free,
>   	.compress_ops	= &q6asm_dai_compress_ops,
>   	.dapm_widgets	= q6asm_dapm_widgets,
>   	.num_dapm_widgets = ARRAY_SIZE(q6asm_dapm_widgets),
>