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drm/panic: Move panic display code into helper library

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Move drm_plane_helper_display_panic_screen() and the existing panic-
display code into drm_panic_helper.c. Rename symbols accordingly.
Also update the QR-related code and the bindings accordingly.

Link the rsp. object file into drm_kms_helper.ko. Eventually the code
will become a DRM drawing library, together with DRM's format and draw
helpers. This requires more preparation. until then, KMS helpers serve
as a module. All DRM drivers link it anyway.

Add a new section about drawing helpers to the documentation of the KMS
helpers. List format and panic helpers there.

v2:
- fix dependencies on other DRM modules (Randy, Sashiko)
- provide placeholders for drm_panic_helper_{init,exit}() (Sashiko)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patch.msgid.link/20260911124540.279841-14-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2026-09-11 14:44:06 +02:00
commit 5c3d323984
17 changed files with 2224 additions and 2163 deletions
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