On Wed, 3 Aug 2016 15:23:30 +0000 Marcel Ziswiler <marcel.ziswi...@toradex.com> wrote:
> On Wed, 2016-08-03 at 15:51 +0200, Marek Vasut wrote: > > On 08/03/2016 11:46 AM, Alban Bedel wrote: > > > > > > On Wed, 3 Aug 2016 09:00:42 +0200 > > > Marek Vasut <ma...@denx.de> wrote: > > > > > > > > > > > On 08/03/2016 07:32 AM, Alban Bedel wrote: > > > > > > > > > > Commit 147271209a9d ("net: asix: fix operation without eeprom") > > > > > added a special handling for ASIX 88772B that enable another > > > > > type of header. This break the driver in DM mode as the extra > > > > > handling > > > > > needed in the receive path is missing. > > > > So add the extra handling ? > > > I can do that too, but I though u-boot preferred to avoid useless > > > code. > > Yes, if it is useless. > > > > > > > > > > > > > > > > > > > However this new header mode is not required and only seems to > > > > > increase the code complexity, so this patch revert this part of > > > > > commit 147271209a9d. > > > > Why is it not required ? > > > It works fine without, since 2012. In fact this change is not even > > > mentioned in the log of commit 147271209a9d, so I really don't know > > > why > > > it was added in the first place. As can be seen in the revert all > > > it > > > does is adding 2 bytes to the USB packets that are then just > > > skipped. > > > Seems pretty useless to me. > > I would like to get some feedback on this from Marcel, since he added > > this stuff. > > Yes, sorry. I just came back from vacation and started looking into it > now. As far as I remember on our hardware without this Ethernet did not > quite work reliably. This also means that with driver model so far it > does not work for us which I fed back to Simon once but so far this has > not been resolved. That fix came from some early U-Boot work done by > Antmicro way back and I am missing some of the history. Then I'll do a new patch that just fix the driver model receive path. Alban
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