linux-kernel - Re: [PATCH 3/5] drm/st7571-i2c: add support inverted pixel format

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Message-ID: <87ldorkpti.fsf@minerva.mail-host-address-is-not-set>
Date: Mon, 14 Jul 2025 12:51:53 +0200
From: Javier Martinez Canillas <javierm@...hat.com>
To: Marcus Folkesson <marcus.folkesson@...il.com>, Maarten Lankhorst
 <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>, Rob Herring <robh@...nel.org>, Krzysztof
 Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, Marcus Folkesson <marcus.folkesson@...il.com>
Subject: Re: [PATCH 3/5] drm/st7571-i2c: add support inverted pixel format

Marcus Folkesson <marcus.folkesson@...il.com> writes:

> Depending on which display that is connected to the controller, an
> "1" means either a black or a white pixel.
>
> The supported formats (R1/R2/XRGB8888) expects the pixels
> to map against (4bit):
>     00 => Black
>     01 => Dark Gray
>     10 => Light Gray
>     11 => White
>
> If this is not what the display map against, make it possible to invert
> the pixels.
>
> Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
> ---

Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat