Re: Bug#767042: [jessie daily 2014-10-27] [armhf] Installation report: LeMaker Banana Pi - problems with autoloading the realtek ethernet PHY driver module
On Wed, Nov 05, 2014 at 10:45:12AM +0000, Ian Campbell wrote:
> On Tue, 2014-11-04 at 22:37 +0100, Karsten Merker wrote:
>
> > I have run further installation tests with today's current d-i images
> > (still based on the same 3.16.5-1 kernel)
>
> OOI if you bodge your way through the install does the resulting system
> boot and discover the PHY reliably? IOW is it specific to d-i or not?
Ethernet works in the installed system (tested with several cold
and warm boots):
[ 2.448442] stmmaceth 1c50000.ethernet: no reset control found
[ 2.454322] Ring mode enabled
[ 2.457396] No HW DMA feature register supported
[ 2.461941] Normal descriptors
[ 2.465279] TX Checksum insertion supported
[ 2.495563] libphy: stmmac: probed
[ 2.499078] eth0: PHY ID 001cc915 at 0 IRQ POLL (stmmac-0:00) active
[ 2.505490] eth0: PHY ID 001cc915 at 1 IRQ POLL (stmmac-0:01)
> > i.e. the PHY appears to have a seperate regulator on the
> > BananaPi but not on the Cubietruck and I wonder whether the
> >
> > startup-delay-us = <50000>;
> >
> > might play a role here.
>
> I think that's a decent theory. Decent enoguh that it is probably worth
> taking it up with the sunxi kernel folks.
>
> Might also be the power supply differs between the two boards?
Running the BananaPi with the Cubietruck's power supply does not
change the behaviour.
I have now run several tests with a modified BananaPi dtb in
which I have added a "regulator-always-on" stanza to the
reg_gmac_3v3 definition. With this change the PHY detection in
d-i has worked every time, so this would support the theory that
the regulator might not be powered up fast enough for the PHY
detection to succeed, but I cannot see why this problem only
occurs within the d-i environment.
Regards,
Karsten
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