This small series adds documentation and a simple kunit test for the new
DRM bridge allocation flow, based on the recently introduced
devm_drm_bridge_alloc() [0].
This work was formerly a part of my v6 DRM bridge hotplug series [1], now
split as a standalone series, hence the "v7" version number.
The overall goal is supporting Linux devices with a DRM pipeline whose
final components can be hot-plugged and hot-unplugged, including one or
more bridges. For more details see the big picture [0].
Current plan and status of the DRM bridge refcounting work:
A. ✔ add new alloc API and refcounting -> (now in drm-misc-next)
B. convert all bridge drivers to new API (v1 under review [2])
C. ➜ documentation, kunit tests (this series)
D. after (B), add get/put to drm_bridge_add/remove() + attach/detech()
E. after (B), convert accessors; this is a large work and can be done
in chunks
F. debugfs improvements
[0]
https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/0cc6aadd7fc1e629b715ea3d1ba537ef2da95eec
[1]
https://lore.kernel.org/dri-devel/20250206-hotplug-drm-bridge-v6-0-9d6f2c9c3...@bootlin.com/
[2]
https://lore.kernel.org/lkml/20250407-drm-bridge-convert-to-alloc-api-v1-0-42113ff8d...@bootlin.com/
Signed-off-by: Luca Ceresoli <luca.ceres...@bootlin.com>
---
Luca Ceresoli (2):
drm/bridge: documentat bridge allocation and lifecycle
drm/tests: bridge: add a KUnit test for devm_drm_bridge_alloc()
Documentation/gpu/drm-kms-helpers.rst | 6 +++
drivers/gpu/drm/drm_bridge.c | 73 +++++++++++++++++++++++++++++++++
drivers/gpu/drm/tests/drm_bridge_test.c | 60 +++++++++++++++++++++++++++
3 files changed, 139 insertions(+)
---
base-commit: e8bf4a1bdaeadb28d13b9a2bcfd5910fda06eede
change-id: 20250408-drm-bridge-alloc-doc-test-267df0def880
Best regards,
--
Luca Ceresoli <luca.ceres...@bootlin.com>
