linux-kernel - Re: DVI/EDID broken with Intel i945 graphics and 2.6.37-rc2

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Message-Id: <b9dded$h40vqf@orsmga002.jf.intel.com>
Date:	Wed, 17 Nov 2010 10:20:09 +0000
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Tino Keitel <tino.keitel@...ei.de>, linux-kernel@...r.kernel.org
Subject: Re: DVI/EDID broken with Intel i945 graphics and 2.6.37-rc2

On Tue, 16 Nov 2010 19:49:14 +0100, Tino Keitel <tino.keitel@...ei.de> wrote:
> Hi,
> 
> 2.6.37-rc2 doesn't seem to detect the LCD connected via DVI on my Mac
> mini Core2 Duo with i945 graphics:

Hmm, sounds like fallout from detection of the VGA connection on the shared
GPIO wire.

Does this help?

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo
index de158b7..ec32ceb 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1327,11 +1327,8 @@ intel_analog_is_connected(struct drm_device *dev)
        if (!analog_connector)
                return false;
 
-       if (analog_connector->funcs->detect(analog_connector, false) ==
-                       connector_status_disconnected)
-               return false;
-
-       return true;
+       return analog_connector->funcs->detect(analog_connector, false) ==
+               connector_status_connected;
 }
 
An alternative is to force detection, ie change the detect(analog, false)
to true.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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