[PATCH V6 0/5] drm/bridge: it66121: Add initial it66122 support

[Nishanth Menon <nm@ti.com>]

Hi,

Add initial support for IT66122, which seems to be compatible to it66121
but probably has additional functionality.

BeagleY-AI uses this it66122 as the old part is no longer in production
as far as I understand.

Now, BeaglePlay uses it66121 at the moment, but at some point, it might
end up flipping over to the new part. Additionally, it also looks like
Revision D of BeagleBone Black switched over to it66122 as well.

Series is based on next-20250827

Bootlog: BeaglePlay: https://gist.github.com/nmenon/65afb917ee1818979d338cf25732a920

Changes in V6:
* Picked up Tomi's ack
* Rebased on next-20251029

Changes in V5:
* Switched over to ARRAY_SIZE
* Picked up Andrew's Reviewed-by

Changes in V4:
* Added patch to sort the compatibles alpha-numerically
* vid/pid lookup is done without using the match_data.
* picked reviews

Changes in V3:
Based on Tomi's and Devarsh's reviews, and searching online (and failing
to find) for a public data sheet, I have refactored the series to:
a) Detect the ID by matching vid/pid
b) Introduce it66122 basic support which seems to work based on
   empirical testing evidence on BeagleY-AI. This allows incremental
   patches in the future by someone who might have access to the data
   sheet to add additional features for the chip.
c) Irritated by checkpatch --strict warnings, added a patch to fix
   existing warnings as part of this series, but it could probably go
   in independent of everything else.
d) Stopped claiming it66122 is drop in replacement of it66121 :)

Changes in V2:
* Picked up Krystoff's binding ack
* Switched over to a vid/pid list

V5: https://lore.kernel.org/all/20250827202354.2017972-1-nm@ti.com/
V4: https://lore.kernel.org/all/20250819130807.3322536-1-nm@ti.com/
V3: https://lore.kernel.org/all/20250815034105.1276548-1-nm@ti.com/
V2: https://lore.kernel.org/all/20250813204106.580141-1-nm@ti.com/
V1: https://lore.kernel.org/all/20250813190835.344563-1-nm@ti.com/


Nishanth Menon (5):
  dt-bindings: display: bridge: it66121: Add compatible string for
    IT66122
  drm/bridge: it66121: Drop ftrace like dev_dbg() prints
  drm/bridge: it66121: Sort the compatibles
  drm/bridge: it66121: Use vid/pid to detect the type of chip
  drm/bridge: it66121: Add minimal it66122 support

 .../bindings/display/bridge/ite,it66121.yaml  |  1 +
 drivers/gpu/drm/bridge/ite-it66121.c          | 68 +++++++++----------
 2 files changed, 34 insertions(+), 35 deletions(-)

-- 
2.47.0