[U-Boot] TFTP pause and timeout on MX28 platforms

[Marek Vasut <marex@denx.de>]

Dear Hector Palacios,

> Dear Marek Vasut,
> 
> On 03/13/2013 11:58 AM, Marek Vasut wrote:
> > Dear Hector Palacios,
> > 
> >> Hello,
> >> 
> >> When doing large TFTP downloads (files bigger than 10MiB) on my MX28
> >> platform I'm sometimes experiencing pauses and timeouts. U-Boot will
> >> eventually restart the transmission and sometimes may successfully
> >> complete the download, but other times it won't.
> >> On my platform it was somewhat mitigated (but not resolved) by reverting
> >> this patch from Marek:
> >> 
> >> commit 67449098a86be18cbdb27345bebe8da57e5d8899
> >> Author: Marek Vasut <marex@denx.de>
> >> Date:   Wed Aug 29 03:49:50 2012 +0000
> >> 
> >>       FEC: Rework the TX wait mechanism
> >> 
> >> The problem is reproducible in Freescale's MX28EVK.
> >> The larger the file, the more chances to see the problem. Please try
> >> with 50MiB files or larger. Has anybody else seen it?
> >> 
> >> On an old U-Boot v2009 TFTP transmission was twice slower than with
> >> v2013, but didn't suffer from this.
> > 
> > What version of u-boot do you use ? It was resolved in recent versions.
> 
> I'm using v2013.01.
> Could you please point me to the commit(s) that solve it?
> The commits I see on drivers/net/fec_mxc.c after v2013.01 are from Troy
> Kisky and don't seem to address this.

commit c0b5a3bbb0cd40a6b23b7b07e2182a5bcdc8c31c
Author: Marek Vasut <marex@denx.de>
Date:   Wed Aug 29 03:49:51 2012 +0000

    FEC: Replace magic contants

and the three before this one. Is your PHY operating correctly? This fixed the 
hangs on multiple MX28 platforms for me.

> Thank you,

Best regards,
Marek Vasut