linux-kernel - Re: [PATCH] drm/dp: drm_edp_backlight_set_level: do not always send 3-byte commands

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <175577300839.1899572.13934617998352604161.b4-ty@oss.qualcomm.com>
Date: Thu, 21 Aug 2025 13:43:28 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: 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>,
        Suraj Kandpal <suraj.kandpal@...el.com>,
        Arun R Murthy <arun.r.murthy@...el.com>,
        Val Packett <val@...kett.cool>
Cc: ankit.k.nautiyal@...el.com, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/dp: drm_edp_backlight_set_level: do not always
 send 3-byte commands

On Sun, 06 Jul 2025 17:42:24 -0300, Val Packett wrote:
> At least some panels using the LSB register are not happy with the
> unconditional increase of the command buffer to 3 bytes.
> 
> With the BOE NE14QDM in my Dell Latitude 7455, the recent patches for
> luminance based brightness have introduced a regression: the brightness
> range stopped being contiguous and became nonsensical (it probably was
> interpreting the last 2 bytes of the buffer and not the first 2).
> 
> [...]

Applied to drm-misc-next, thanks!

[1/1] drm/dp: drm_edp_backlight_set_level: do not always send 3-byte commands
      commit: 4aa8961b1b9c7498550b41168a91cf1558133dd3

Best regards,
-- 
With best wishes
Dmitry