[PATCH 0/4] drm/panic: Add a qr_code panic screen

[Jocelyn Falempe]

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

-- 

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 ++++++++++++++++++++++++++++++++
 include/drm/drm_panic.h         |   4 +
 include/drm/drm_rect.h          |  15 +
 7 files changed, 1340 insertions(+), 39 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_panic_qr.rs


base-commit: 3f5ea7ed705e8effe9cfabf912e769ccb6b7d389
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2.45.2