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

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Message-ID: <20120803161416.GA22563@srcf.ucam.org>
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
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