RTL930x SFP ports may use either a directly attached SerDes module
or a module containing a PHY discovered after switch setup. Static
PHY polling cannot provide link state for the latter, while forcing
every port would override hardware state for PCS and statically
polled PHY links.
Program the MAC link-state source for non-static links. Dynamic SGMII
and out-of-band PHYs select their PHY state source and remain forced.
Dynamic USXGMII PHYs pulse force with the resolved parameters before
returning to PCS-controlled state. Fixed links and CPU ports also
remain forced.
Keep flow-control forcing independent from link-state forcing so
phylink's resolved pause settings remain active when link state returns
to hardware control.
Preserve force mode while a forced link is down so the MAC reports
the down state instead of reverting to its hardware source.
Tested on RTL930x hardware.
Assisted-by: ChatGPT (OpenAI GPT-5.6 Sol)
Link: https://github.com/openwrt/openwrt/pull/25118
Signed-off-by: Jonas Jelonek <jonas@jonasjelonek.de>
Jonas Jelonek
76484bf8b8