pcm_construct/pcm_destruct callbacks are not called for BE DAIs. This means that, if the generic dmaengine driver is used, there is no managed buffer allocation (or pre-allocation). To be able to use the generic dmaengine driver for BE DAI links, allocate the buffer in the hw_params callback if there is no managed buffer.
Signed-off-by: Codrin Ciubotariu codrin.ciubotariu@microchip.com --- sound/soc/soc-generic-dmaengine-pcm.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c index 9ef80a48707e..c915da71e1cd 100644 --- a/sound/soc/soc-generic-dmaengine-pcm.c +++ b/sound/soc/soc-generic-dmaengine-pcm.c @@ -98,6 +98,22 @@ static int dmaengine_pcm_hw_params(struct snd_soc_component *component, return ret; }
+ if (!substream->managed_buffer_alloc) { + substream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_IRAM; + substream->dma_buffer.dev.dev = chan->device->dev; + return snd_pcm_lib_malloc_pages(substream, + params_buffer_bytes(params)); + } + + return 0; +} + +static int dmaengine_pcm_hw_free(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + if (!substream->managed_buffer_alloc) + return snd_pcm_lib_free_pages(substream); + return 0; }
@@ -332,6 +348,7 @@ static const struct snd_soc_component_driver dmaengine_pcm_component = { .open = dmaengine_pcm_open, .close = dmaengine_pcm_close, .hw_params = dmaengine_pcm_hw_params, + .hw_free = dmaengine_pcm_hw_free, .trigger = dmaengine_pcm_trigger, .pointer = dmaengine_pcm_pointer, .pcm_construct = dmaengine_pcm_new, @@ -343,6 +360,7 @@ static const struct snd_soc_component_driver dmaengine_pcm_component_process = { .open = dmaengine_pcm_open, .close = dmaengine_pcm_close, .hw_params = dmaengine_pcm_hw_params, + .hw_free = dmaengine_pcm_hw_free, .trigger = dmaengine_pcm_trigger, .pointer = dmaengine_pcm_pointer, .copy_user = dmaengine_copy_user,