linux-kernel - Re: [RFC PATCH 3/5] drm/i915: register LVDS connector even if we can't get a panel mode

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]

Date:	Fri, 3 Aug 2012 17:14:16 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Seth Forshee <seth.forshee@...onical.com>
Cc:	dri-devel@...ts.freedesktop.org,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org,
	Andreas Heider <andreas@...tr.de>
Subject: Re: [RFC PATCH 3/5] drm/i915: register LVDS connector even if we
 can't get a panel mode

On Fri, Aug 03, 2012 at 11:02:19AM -0500, Seth Forshee wrote:
> Some Apple hybrid graphics machines do not have the LVDS panel connected
> to the integrated GPU at boot and also do not supply a VBT. The LVDS
> connector is not registered as a result, making it impossible to support
> graphics switching.
> 
> This patch changes intel_lvds_init() to register the connector even if
> we can't find any panel modes. This makes it necessary to always check
> intel_lvds->fixed_mode before use, as it could now be NULL.

This one kind of sucks. I think adding a quirk for this situation would 
be justifiable, rather than doing it for all devices.

-- 
Matthew Garrett | mjg59@...f.ucam.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/