On Thu, May 28, 2020 at 6:43 PM Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> wrote: > On Thu, May 28, 2020 at 05:52:24PM +0300, Andy Shevchenko wrote: > > On Wed, May 27, 2020 at 01:50:20AM +0300, Serge Semin wrote: ... > > Perhaps, > > > > /* DesignWare DMA supports burst value from 0 */ > > caps->min_burst = 0; > > Regarding min_burst being zero. I don't fully understand what it means. > It means no burst or burst with minimum length or what? > In fact DW DMA burst length starts from 1. Remember the burst-length run-time > parameter we were arguing about? Anyway the driver makes sure that both > 0 and 1 requested burst length are setup as burst length of 1 in the > CTLx.SRC_MSIZE, CTLx.DST_MSIZE fields. Yeah, I also thought about it after I sent a message. 1 sounds better. -- With Best Regards, Andy Shevchenko
