On Wed, Jul 03, 2024 at 05:33:57PM +0200, Jocelyn Falempe wrote: > This series adds a new panic screen, with the kmsg data embedded in a QR-code. > > The main advantage of QR-code, is that you can copy/paste the debug data to a bug report. > > The QR-code encoder is written in rust, and is very specific to drm_panic. > The reason is that it is called in a panic handler, and thus can't allocate memory, or use locking. > The rust code uses a few rust core API, and provides only two C entry points. > There is no particular reason to do it in rust, I just wanted to learn rust, and see if it can work in the kernel. > > If you want to see what it looks like, I've put a few screenshots here: > https://github.com/kdj0c/panic_report/issues/1 Cool, this idea has been floating around for decades, here's the last attempt at this back in 2014: https://lore.kernel.org/all/1395093587-2583-1-git-send-email-teobaluta@xxxxxxxxx/ > > -- > > Jocelyn > > > Jocelyn Falempe (4): > drm/panic: Add integer scaling to blit() > drm/rect: add drm_rect_overlap() > drm/panic: simplify logo handling > drm/panic: Add a qr_code panic screen > > drivers/gpu/drm/Kconfig | 29 + > drivers/gpu/drm/Makefile | 1 + > drivers/gpu/drm/drm_drv.c | 3 + > drivers/gpu/drm/drm_panic.c | 338 +++++++++-- > drivers/gpu/drm/drm_panic_qr.rs | 989 ++++++++++++++++++++++++++++++++ Wait, we can put .rs files in any directory now? I didn't think that worked properly yet. thanks, greg k-h
