linux-kernel - Re: [PATCH] drm/bridge: display-connector: don't set OP

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: <175535681533.1839975.1951145166123046642.b4-ty@oss.qualcomm.com>
Date: Sat, 16 Aug 2025 18:07:01 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...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>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] drm/bridge: display-connector: don't set OP_DETECT for DisplayPorts

On Sat, 02 Aug 2025 13:40:35 +0300, Dmitry Baryshkov wrote:
> Detecting the monitor for DisplayPort targets is more complicated than
> just reading the HPD pin level: it requires reading the DPCD in order to
> check what kind of device is attached to the port and whether there is
> an actual display attached.
> 
> In order to let DRM framework handle such configurations, disable
> DRM_BRIDGE_OP_DETECT for dp-connector devices, letting the actual DP
> driver perform detection. This still keeps DRM_BRIDGE_OP_HPD enabled, so
> it is valid for the bridge to report HPD events.
> 
> [...]

Applied to drm-misc-next, thanks!

[1/1] drm/bridge: display-connector: don't set OP_DETECT for DisplayPorts
      commit: cb640b2ca54617f4a9d4d6efd5ff2afd6be11f19

Best regards,
-- 
With best wishes
Dmitry