Hi, Sorry that I couldn't get to this sooner.
On 02/18/2016 10:07 AM, Alexander Kochetkov wrote: > Hello! > > Bartlomiej, could you please tell what uart driver is used on Samsung > Exynos4412? > Dinh, could you please tell what uart driver is used on SoCFPGA? > SoCFPGA is using the 8250_dw.c uart driver. > 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 > line: > > if (*bursts == 1) > - return _bursts(pl330, dry_run, buf, pxs, 1); > + return _bursts(dry_run, buf, pxs, 1); > This case still fails for me. > 2) Checkout next-20160211 kernel tree and set src_maxburst and > dst_maxburst to 1 inside UART driver to see is it works? > This case works and the UART is able to operate in DMA mode. Dinh
