linux-kernel - Re: [PATCH 0/4] drm/panic: Add a qr

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Message-ID: <CAH5fLgiMJZYhSiBVc7r3HP0VTCNVG=FuD68v-ni4=54t5vVPwQ@mail.gmail.com>
Date: Thu, 4 Jul 2024 11:18:14 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: Jocelyn Falempe <jfalempe@...hat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
	Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Wedson Almeida Filho <wedsonaf@...il.com>, Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Bjorn Roy Baron <bjorn3_gh@...tonmail.com>, Benno Lossin <benno.lossin@...ton.me>, 
	Andreas Hindborg <a.hindborg@...sung.com>, linux-kernel@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, rust-for-linux@...r.kernel.org, 
	Danilo Krummrich <dakr@...hat.com>
Subject: Re: [PATCH 0/4] drm/panic: Add a qr_code panic screen

On Wed, Jul 3, 2024 at 5:44 PM Jocelyn Falempe <jfalempe@...hat.com> 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.

Alice