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

Hi Dmitry, Neil,

Can this be merged?

 Tomi

On 29/10/2025 17:06, Nishanth Menon wrote:
> 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(-)
>

Hi,

On Wed, 29 Oct 2025 10:06:31 -0500, Nishanth Menon wrote:
> 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.
> 
> [...]

Thanks, Applied to https://gitlab.freedesktop.org/drm/misc/kernel.git (drm-misc-next)

[1/5] dt-bindings: display: bridge: it66121: Add compatible string for IT66122
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/e902d2c38a2797aa78c1e08fc1419490bb8c63dd
[2/5] drm/bridge: it66121: Drop ftrace like dev_dbg() prints
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/1ba36afa667bf14820a9862e18b5d55ee47a67e4
[3/5] drm/bridge: it66121: Sort the compatibles
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/a1df28b5f4d30467b8dabe861f1da324e00313fd
[4/5] drm/bridge: it66121: Use vid/pid to detect the type of chip
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/a8811c0bb79c60bf2464e939c8e040b5d6f532ef
[5/5] drm/bridge: it66121: Add minimal it66122 support
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/715cbb21c6fe2fe5760ea05e873f12473aa5884e

-- 
Neil