linux-kernel - Re: [RFC PATCH 0/1] drm/i915/display: Avoid unsupported 300Hz output mode on a TUXEDO device

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: <7df81e96-14b0-4fde-955d-2960e240b4c7@tuxedocomputers.com>
Date: Fri, 4 Jul 2025 21:22:51 +0200
From: Werner Sembach <wse@...edocomputers.com>
To: Jani Nikula <jani.nikula@...ux.intel.com>,
 Rodrigo Vivi <rodrigo.vivi@...el.com>,
 Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
 Tvrtko Ursulin <tursulin@...ulin.net>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>
Cc: intel-gfx@...ts.freedesktop.org, intel-xe@...ts.freedesktop.org,
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 t.guttzeit@...edocomputers.com
Subject: Re: [RFC PATCH 0/1] drm/i915/display: Avoid unsupported 300Hz output
 mode on a TUXEDO device

Forgot to add Tim to the cover letter cc (I have not yet found a nice way to 
auto generate cover letter to's and cc's unlike for the actual patches)

Am 04.07.25 um 21:03 schrieb Werner Sembach:
> RFC because I'm not sure if this is the right approach.
>
> The flicker manifests ever few seconds 1-3 black frames in quick
> succession.
>
> On windows 300Hz can not be selected for the iGPU, but the panel advertises
> it.
>
> A cleaner solution would probably to go over the pixel clock, but for this
> device there is only one 300Hz mode in the panels edid and that is at the
> nativ resolution. Chroma subsampling was not tested as linux afaik offers
> no way to easily enforce it for intel gpus.
>
> Tim Guttzeit (1):
>    drm/i915/display: Avoid unsupported output mode with 300Hz on TUXEDO
>      device
>
>   drivers/gpu/drm/i915/display/intel_dp.c     |  5 ++++
>   drivers/gpu/drm/i915/display/intel_quirks.c | 30 +++++++++++++++++++++
>   drivers/gpu/drm/i915/display/intel_quirks.h |  1 +
>   3 files changed, 36 insertions(+)
>