Troubleshooting • RPI4: could not attach PHY

Hi, this is a problem that recently occurred when introducing kernel 6.6 to a custom yocto image. The build is based on meta-raspberrypi layer and a poky distribution. This only is a problem with an RPI4, not CM4 (here everything works fine). Since moving to the kernel 6.6 from 5.15 the issue of the PHY not being connected persists. The RPI4 is powered with the official charger. The logs of dmesg that seem to show the culprit are below:

[ 27.664397] could not attach to PHY
[ 27.668109] bcmgenet fd580000.ethernet eth0: failed to connect to PHY
[ 27.723896] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled

Do you have any advice on how to debug this further? What could be the real problem?

Statistics: Posted by rockerr — Thu Dec 05, 2024 12:42 pm

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