Re: commit 271e1b86e691 is breaking DMA uart on SoCFPGA
From: Bartlomiej Zolnierkiewicz
Date: Wed Feb 24 2016 - 08:21:42 EST
On Thursday, February 18, 2016 07:07:28 PM Alexander Kochetkov wrote:
> Bartlomiej, could you please tell what uart driver is used on Samsung
> Dinh, could you please tell what uart driver is used on SoCFPGA?
> Could you make two test?
> 1) Checkout tree at commit 848e9776fee4 "dmaengine: pl330: support
> burst mode for
> dev-to-mem and mem-to-dev transmit", make it buildable and see is it
> works. In order to make in buildable remove bursts argument from the
> if (*bursts == 1)
> - return _bursts(pl330, dry_run, buf, pxs, 1);
> + return _bursts(dry_run, buf, pxs, 1);
This fails (UART DMA doesn't work).
> 2) Checkout next-20160211 kernel tree and set src_maxburst and
> dst_maxburst to 1 inside UART driver to see is it works?
This succeeds (UART DMA works fine).
Samsung R&D Institute Poland