linux-kernel - Re: [PATCH 0/2] parse horizontal/vertical flip properties

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Message-ID: <35debf21-bca7-480f-a61e-7b0494f10ca5@pengutronix.de>
Date: Wed, 23 Jul 2025 11:29:27 +0200
From: Fabian Pfitzner <f.pfitzner@...gutronix.de>
To: Jacopo Mondi <jacopo.mondi@...asonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring
 <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Jacopo Mondi <jacopo@...ndi.org>,
 Sakari Ailus <sakari.ailus@...ux.intel.com>, linux-media@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 entwicklung@...gutronix.de
Subject: Re: [PATCH 0/2] parse horizontal/vertical flip properties

On 7/23/25 11:17, Jacopo Mondi wrote:
> Hi Fabian
>
> On Wed, Jul 23, 2025 at 10:58:28AM +0200, Fabian Pfitzner wrote:
>> There are cameras containing a mirror on their optical path e. g. when
>> mounted upside down.
> How is this different from 'rotation = 180' ?
If you simply want to flip the output (e. g. horizontally), you cannot 
do this with a rotation.
The camera I'm referring to is not only upside down, but also flipped 
horizontally.
>
>> Introduce two options to change the device's flip property via device tree.
>>
>> As there is already support for the panel-common driver [1], add it for cameras in the same way.
>>
>> [1] commit 3c0ecd83eee9 ("dt-bindings: display: panel: Move flip properties to panel-common")
>>
>> Signed-off-by: Fabian Pfitzner <f.pfitzner@...gutronix.de>
>> ---
>> Fabian Pfitzner (2):
>>        media: dt-bindings: add flip properties
>>        media: v4l: fwnode: parse horizontal/vertical flip properties
>>
>>   .../devicetree/bindings/media/video-interface-devices.yaml        | 8 ++++++++
>>   drivers/media/v4l2-core/v4l2-fwnode.c                             | 3 +++
>>   include/media/v4l2-fwnode.h                                       | 4 ++++
>>   3 files changed, 15 insertions(+)
>> ---
>> base-commit: 6832a9317eee280117cd695fa885b2b7a7a38daf
>> change-id: 20250718-fpf-media-dt-flip-7fcad30bcfb7
>>
>> Best regards,
>> --
>> Fabian Pfitzner <f.pfitzner@...gutronix.de>
>>
-- 
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