On 04/07/2024 11:18, Alice Ryhl wrote:
On Wed, Jul 3, 2024 at 5:44 PM Jocelyn Falempe <jfalempe@xxxxxxxxxx> 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
--
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
I tried to apply this patch, but I can't find this commit, nor could I
find any tag that it applies on.
Sorry, it's the drm-misc-next branch of
git@xxxxxxxxxxxxxxxxxxxxxx:drm/misc/kernel.git
Alice
