On Mon, Dec 05, 2022 at 10:01:35AM -0800, Tim Harvey wrote: > Vladimir, > > Yes, this patch resolves the issue. Enabling CONFIG_MARVELL_PHY > without this patch still shows the issue. Yeah, that makes sense considering what the issue is. > Thanks - please cc me on that and I'll respond (unless you want me to send it). > > I'll submit a v2 of my dt patch with fec phy-mode = 'rgmii' after this > patch lands. The question is how far to backport this change. I see that the GW5904 board was introduced in 2017. Which kernels do you need to support the complete/unambiguous dt-binding? I'm tempted to submit the patch to the "net" tree (making it a candidate for stable releases) but without a Fixes: tag, making it go as far as it will. That would be down to kernel 5.18, where the mv88e6xxx_get_caps() function was introduced. Further down, and we'd need different patches for older stable trees.