Hi Fredrik, On 07/14/2018 09:49 AM, Fredrik Noring wrote: > so I added a sleep with > > + msleep(10000); > + > return 0; > > et voilĂ , the screen came alive and the kernel panic was revealed! It seems > the kernel panics so fast that the PS3 frame buffer is unprepared. This is, > of course, very unfortunate because trying to debug the boot process without > a screen or any other means of obtaining console text is quite difficult.
We could add a fixed delay there, but I'd like to avoid waiting that long on every boot. Why don't you add a kernel module_param named something like ps3fb_delay that takes a value in milliseconds and a default of zero. See: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/video/fbdev/ps3fb.c?h=v4.17#n260 > I suppose the problem is that it relies on interrupts for ps3fb_sync_image > to regularly copy the image, hence without them the screen isn't updated to > show kernel panics, etc. Perhaps one way to fix that is to implement the > struct fb_tile_ops API, so that the console is synchronously updated? Would > that be acceptable? I'm not sure if that would work or not. Maybe Geert is more familiar with it. -Geoff