linux-kernel - Re: [PATCH v3 2/3] drm/mipi-dsi: Add flag to support dual-panel configurations

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: <vqiizai33y53o3h6ovhilcco5yyssfqwqrqnccskqoye23bf2o@rtob2tooaqr3>
Date: Fri, 26 Sep 2025 01:04:14 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Jun Nie <jun.nie@...aro.org>
Cc: Rob Clark <robin.clark@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Krishna Manikandan <quic_mkrishn@...cinc.com>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/3] drm/mipi-dsi: Add flag to support dual-panel
 configurations

On Thu, Sep 25, 2025 at 03:10:35PM +0800, Jun Nie wrote:
> Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com> 于2025年9月25日周四 02:02写道：
> >
> > On Wed, 24 Sept 2025 at 18:08, Jun Nie <jun.nie@...aro.org> wrote:
> > >
> > > Some devices treat two independent physical DSI panels as a single
> > > logical panel from the CRTC's perspective. However, two separate DSI
> > > hosts are still required to drive the panels individually.
> > >
> > > Introduce a `dual_panel` flag to the `mipi_dsi_device` struct. This
> > > allows a panel driver to inform the DSI host that it is part of a
> > > dual-panel setup, enabling the host to coordinate both physical
> > > displays as one.
> >
> > How is it being set?
> 
> This is set by panel driver in probe(). You mean this should be documented
> here, right?

Yes.

> 
> > >
> > > Signed-off-by: Jun Nie <jun.nie@...aro.org>
> > > ---
> > >  include/drm/drm_mipi_dsi.h | 2 ++
> > >  1 file changed, 2 insertions(+)
> > >
> > > diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
> > > index 5a85ba01f402a3866b70828391bb417bb8dd5956..0faff285d9ffeb19e4523cdc7bf21c1ec20e6eff 100644
> > > --- a/include/drm/drm_mipi_dsi.h
> > > +++ b/include/drm/drm_mipi_dsi.h
> > > @@ -170,6 +170,7 @@ struct mipi_dsi_device_info {
> > >   * @host: DSI host for this peripheral
> > >   * @dev: driver model device node for this peripheral
> > >   * @attached: the DSI device has been successfully attached
> > > + * @dual_panel: the DSI device is one instance of dual panel
> > >   * @name: DSI peripheral chip type
> > >   * @channel: virtual channel assigned to the peripheral
> > >   * @format: pixel format for video mode
> > > @@ -188,6 +189,7 @@ struct mipi_dsi_device {
> > >         struct mipi_dsi_host *host;
> > >         struct device dev;
> > >         bool attached;
> > > +       bool dual_panel;
> > >
> > >         char name[DSI_DEV_NAME_SIZE];
> > >         unsigned int channel;
> > >
> > > --
> > > 2.34.1
> > >
> >
> >
> > --
> > With best wishes
> > Dmitry

-- 
With best wishes
Dmitry