[lkml]   [2020]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 07/14] net: axienet: Fix SGMII support
On Fri, 10 Jan 2020 15:04:15 +0100
Andrew Lunn <> wrote:

Hi Andrew,

> On Fri, Jan 10, 2020 at 11:54:08AM +0000, Andre Przywara wrote:
> > With SGMII, the MAC and the PHY can negotiate the link speed between
> > themselves, without the host needing to mediate between them.
> > Linux recognises this, and will call phylink's mac_config with the speed
> > member set to SPEED_UNKNOWN (-1).
> > Currently the axienet driver will bail out and complain about an
> > unsupported link speed.
> >
> > Teach axienet's mac_config callback to leave the MAC's speed setting
> > alone if the requested speed is SPEED_UNKNOWN.
> Hi Andre
> Is there an interrupt when SGMII signals a change in link state? If
> so, you should call phylink_mac_change().

Good point. The doc describes a "Auto-Negotiation Complete" interrupt status bit, which signal that " ... auto-negotiation of the SGMII or 1000BASE-X interface has completed."
But I have no clue whether that would trigger on a link status *change*. Is there a way to test this without pulling the cable? My board sits in a data centre, so is not easily accessible to me.


 \ /
  Last update: 2020-01-10 15:21    [W:0.106 / U:7.392 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site