linux-kernel - Re: [PATCH v3 1/3] drm/panel: novatek-nt35560: Fix invalid return value

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Message-ID: <CACRpkdaZxPKmi3XWxKVG+HpssdH=HGDa68Ek=bcX-GEaQXaSbw@mail.gmail.com>
Date: Mon, 18 Aug 2025 11:24:59 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Brigham Campbell <me@...ghamcampbell.com>
Cc: maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de, 
	airlied@...il.com, simona@...ll.ch, neil.armstrong@...aro.org, 
	jessica.zhang@....qualcomm.com, sam@...nborg.org, dianders@...omium.org, 
	skhan@...uxfoundation.org, linux-kernel-mentees@...ts.linux.dev, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] drm/panel: novatek-nt35560: Fix invalid return value

On Wed, Jul 30, 2025 at 8:17 AM Brigham Campbell <me@...ghamcampbell.com> wrote:

> Fix bug in nt35560_set_brightness() which causes the function to
> erroneously report an error. mipi_dsi_dcs_write() returns either a
> negative value when an error occurred or a positive number of bytes
> written when no error occurred. The buggy code reports an error under
> either condition.
>
> Fixes: 8152c2bfd780 ("drm/panel: Add driver for Sony ACX424AKP panel")
> Reviewed-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
> Signed-off-by: Brigham Campbell <me@...ghamcampbell.com>

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

(Maybe this is applied already...)

Yours,
Linus Walleij