linux-kernel - [PATCH V3 0/4] drm/bridge: it66121: Add initial it66122 support

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Message-ID: <20250815034105.1276548-1-nm@ti.com>
Date: Thu, 14 Aug 2025 22:41:01 -0500
From: Nishanth Menon <nm@...com>
To: Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Rob Herring <robh@...nel.org>, David Airlie
	<airlied@...il.com>,
        Maxime Ripard <mripard@...nel.org>,
        Laurent Pinchart
	<Laurent.pinchart@...asonboard.com>,
        Neil Armstrong
	<neil.armstrong@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>,
        Robert Nelson <robertcnelson@...il.com>,
        Jason Kridner <jkridner@...gleboard.org>, <afd@...com>,
        <tomi.valkeinen@...asonboard.com>, <devarsht@...com>,
        Nishanth Menon
	<nm@...com>
Subject: [PATCH V3 0/4] drm/bridge: it66121: Add initial it66122 support

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.

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

V1: https://lore.kernel.org/all/20250813190835.344563-1-nm@ti.com/
V2: https://lore.kernel.org/all/20250813204106.580141-1-nm@ti.com/

Nishanth Menon (4):
  dt-bindings: display: bridge: it66121: Add compatible string for
    IT66122
  drm/bridge: it66121: Drop ftrace like dev_dbg() prints
  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          | 63 +++++++++----------
 2 files changed, 32 insertions(+), 32 deletions(-)

-- 
2.47.0