[U-Boot] [PATCH v3 9/9] net/designware: Reduce DMA burst length

Marek Vasut
2014-04-27T18:08:50Z

On Sunday, April 27, 2014 at 05:29:29 PM, Chen-Yu Tsai wrote:
> On Sun, Apr 27, 2014 at 11:25 PM, Ian Campbell <ijc@hellion.org.uk> wrote:
> > On Sat, 2014-04-26 at 20:28 +0200, Marek Vasut wrote:
> >> On Friday, April 18, 2014 at 08:05:50 PM, Ian Campbell wrote:
> >> > From: Jens Kuske <jenskuske@gmail.com>
> >> >
> >> > The GMAC module in Allwinner sunxi SoCs seems to have problems with
> >> > burst lengths > 8.
> >>
> >> Is there any explanation for the problems please ?
> >
> > Jens or Wens, can you answer this?
>
> IIRC, with burst lengths > 8, GMAC doesn't work, no ping, no DHCP.
> I don't remember if it was TX or RX that suffered, or even both.
>
> Hope this clarifies things a bit.

No, it does not at all, sorry. What you describe are symptoms, but what I want
to know is what is the root cause of those symptoms. You did not explain that.

Best regards,
Marek Vasut