On Thu, May 28, 2020 at 6:43 PM Serge Semin
[off-list ref] wrote:

On Thu, May 28, 2020 at 05:52:24PM +0300, Andy Shevchenko wrote:

quoted

On Wed, May 27, 2020 at 01:50:20AM +0300, Serge Semin wrote:

...

quoted

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