linux-kernel - Re: [PATCH v3 5/8] drm/msm/dp: Drop EV_USER

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

Message-ID: <17990836-4278-4c5b-afa4-eb631930ba2a@oss.qualcomm.com>
Date: Thu, 15 Jan 2026 10:41:25 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov
 <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Jessica Zhang <jessica.zhang@....qualcomm.com>
Subject: Re: [PATCH v3 5/8] drm/msm/dp: Drop EV_USER_NOTIFICATION

On 1/15/26 8:29 AM, Dmitry Baryshkov wrote:
> From: Jessica Zhang <jessica.zhang@....qualcomm.com>
> 
> Currently, we queue an event for signalling HPD connect/disconnect. This
> can mean a delay in plug/unplug handling and notifying DRM core when a
> hotplug happens.
> 
> Drop EV_USER_NOTIFICATION and signal the IRQ event as part of hotplug
> handling.

IIUC, the drm_helper_hpd_irq_event() -> drm_bridge_hpd_notify() change
also prevents us from checking *all* connectors if we get *any* HPD?

Konrad