Paul Burton <paul.bur...@imgtec.com> writes: > If a device tree specified a preferred device for kernel console output > via the stdout-path or linux,stdout-path chosen node properties there's > no guarantee that it will have specified a device for which we have a > driver. It may also be the case that we do have a driver but it doesn't > call of_console_check() to register as a preferred console (eg. offb > driver as used on powermac systems). > > In these cases try to ensure that we provide some console output by > enabling the first usable registered console, which we keep track of > with the of_fallback_console variable. Affected systems will enable > their console later than they did prior to commit 05fd007e4629 > ("console: don't prefer first registered if DT specifies stdout-path") > but should otherwise produce the same output. > > Tested in QEMU with a PowerPC pseries_defconfig kernel.
Hi Paul, This does "work", as in it boots and I get a console. But the delay in getting output on the VGA is not workable. I get pretty much no output until the machine is booted entirely to userspace, meaning any crash prior to that will be undebuggable. I also note Andreas reports it doesn't work at all on PowerMac. Please send a revert and we can try again next cycle. cheers