On Mon, Mar 27, 2023 at 02:15:47PM -0400, Sean Anderson wrote: > On 3/24/23 09:17, Ioana Ciornei wrote: > > On Tue, Mar 21, 2023 at 04:13:12PM -0400, Sean Anderson wrote: > >> This adds serdes support to the LS1088ARDB. I have tested the QSGMII > >> ports as well as the two 10G ports. The SFP slot is now fully supported, > >> instead of being modeled as a fixed-link. > >> > >> Linux hangs around when the serdes is initialized if the si5341 is > >> enabled with the in-tree driver, so I have modeled it as a two fixed > >> clocks instead. There are a few registers in the QIXIS FPGA which > >> control the SFP GPIOs; I have modeled them as discrete GPIO controllers > >> for now. I never saw the AQR105 interrupt fire; not sure what was going > >> on, but I have removed it to force polling. > > > > So you didn't see the interrupt fire even without these patches? > > Not sure. I went to check this, and discovered I could no longer get the > link to come up in Linux, even on v6.0 (before the rate adaptation > tuff). I see the LEDs blinking in U-Boot, so presumably it's some > configuration problem. I'm going to look into this further when I have > more time. > > > I just tested this on a LS1088ARDB and it works. > > > > root@localhost:~# cat /proc/interrupts | grep extirq > > 99: 5 ls-extirq 2 Level 0x0000000008b97000:00 > > root@localhost:~# ip link set dev endpmac2 up > > root@localhost:~# cat /proc/interrupts | grep extirq > > 99: 6 ls-extirq 2 Level 0x0000000008b97000:00 > > root@localhost:~# ip link set dev endpmac2 down > > root@localhost:~# cat /proc/interrupts | grep extirq > > 99: 7 ls-extirq 2 Level 0x0000000008b97000:00 > > > > Please don't just remove things. > > Well, polling isn't the worst thing for a single interface... I do > remember having a problem with the interrupt. If this series works > with interrupts enabled, I can leave it in. > > Did you have a chance to look at the core (patches 7 and 8) of this > series? Does it make sense to you? Am I missing something which would > allow switching from 1G->10G? > For a bit of context, I also attempted dynamic switching from 1G to 10G on my own even before this patch set but I did not get a link up on the PCS (CDR lock was there through). Pretty much the same state as you. What I propose is to take this whole endeavor step by step. I am also interrested in getting this feature to actually work but I just didn't have the time to investigate in depth was is missing. And without the dynamic switching I cannot say that I find the addition of the SerDes PHY driver useful. I have the Lynx 10G on my TODO list but I still have some other tasks on the Lynx 28G for the next 2-3 weeks. Once I get those done, I will look closer at the patches. In the meantime, some small thigs from this patch set can be submitted separately. For example, describing the SFP cage on the LS1088ARDB. I still have some small questions on the DTS implementation for the gpio controllers but I would be able to submit this myself if you do not find the time (with your authorship of course). Ioana
