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: <CABymUCP2m-Z1spkAydryNWfysXTVma_H=7w=0GYL6+aH5KW9QA@mail.gmail.com>
Date: Thu, 25 Sep 2025 15:10:35 +0800
From: Jun Nie <jun.nie@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
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

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?

> >
> > 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