On 2024-10-21, Ryo Takakura <ryotkk...@gmail.com> wrote: >> Rather than removing the deferring, it would be better to convert the >> console you are using to the new NBCON API. Then it would be able to >> print direct and safe during panic. (printk_deferred does not affect >> NBCON consoles.) What console driver are you using that you want to >> see the messages on? > > I was working on qemu ppc64 this time but I am usually working on > Raspberry Pi 4 (mostly for fun and study) which uses either of > bcm2835-aux-uart or amba-pl011. It would be really nice to see them > working as nbcon! > I am thinking of taking a look at [0] but If there were any other > references, I would really like to look into as well. > > [0] https://lore.kernel.org/lkml/87wn3zsz5x....@jogness.linutronix.de/
The lastest version of the series is here [1]. The series is still undergoing revisions, however the changes are 8250-specific. The API for nbcon consoles is already available since 6.12-rc1. You are certainly welcome to try to convert one of those Raspi 4 drivers to the nbcon interface. I would be happy to review it. John Ogness [1] https://lore.kernel.org/lkml/20240913140538.221708-1-john.ogn...@linutronix.de
