On Thu, Jun 29, 2023 at 7:00 PM Fabio Estevam <festevam@xxxxxxxxx> wrote: > Hi Shengjiu, > > On Wed, Jun 28, 2023 at 11:10 PM Shengjiu Wang <shengjiu.wang@xxxxxxx> > wrote: > > > > ASRC can be used on memory to memory case, define several > > functions for m2m usage and export them as function pointer. > > > > Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx> > > Could you please explain what is the benefit of using M2M in the EASRC > driver? > > Users may want to get the ASRC output in the user space, then do mixing with other streams before sending to DAC. so this patch-set is to use the v4l2 API for this usage, because there is no such API in ASoC. > A few weeks ago, an imx8mn user reported that the EASRC with the > mainline kernel introduces huge delays. > > Does M2M help with this aspect? > No, M2M can't help with the delays issue. The delay issue maybe caused by the buffer size or the prefilled data needs by EASRC. Best regards wang shengjiu > > Thanks >
