Re: [alsa-devel] what is period_size, buffer_size and boundary size, i confuse them

l9jj@163.com wrote:

does the variable buffer_size equal to DMA size?

Yes.

(2)how the pos>buffer_size will happen in the interface snd_pcm_update_hw_ptr0()?

It happens when your driver has a bug. The .pointer callback always must return value that is inside the DMA buffer.

Regards, Clemens