This is a note to let you know that I've just added the patch titled
drm/i915/sdvo: Use &intel_sdvo->ddc instead of intel_sdvo->i2c for DDC.
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-sdvo-use-intel_sdvo-ddc-instead-of-intel_sdvo-i2c-for-ddc.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 53d3b4d7778daf15900867336c85d3f8dd70600c Mon Sep 17 00:00:00 2001
From: Egbert Eich <eich@xxxxxxx>
Date: Tue, 4 Jun 2013 17:13:21 +0200
Subject: drm/i915/sdvo: Use &intel_sdvo->ddc instead of intel_sdvo->i2c for DDC.
From: Egbert Eich <eich@xxxxxxx>
commit 53d3b4d7778daf15900867336c85d3f8dd70600c upstream.
In intel_sdvo_get_lvds_modes() the wrong i2c adapter record is used
for DDC. Thus the code will always have to rely on a LVDS panel
mode supplied by VBT.
In most cases this succeeds, so this didn't get detected for quite
a while.
This regression seems to have been introduced in
commit f899fc64cda8569d0529452aafc0da31c042df2e
Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Date: Tue Jul 20 15:44:45 2010 -0700
drm/i915: use GMBUS to manage i2c links
Signed-off-by: Egbert Eich <eich@xxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
[danvet: Add note about which commit likely introduced this issue.]
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_sdvo.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1581,7 +1581,7 @@ static void intel_sdvo_get_lvds_modes(st
* Assume that the preferred modes are
* arranged in priority order.
*/
- intel_ddc_get_modes(connector, intel_sdvo->i2c);
+ intel_ddc_get_modes(connector, &intel_sdvo->ddc);
if (list_empty(&connector->probed_modes) == false)
goto end;
Patches currently in stable-queue which might be from eich@xxxxxxx are
queue-3.4/drm-i915-sdvo-use-intel_sdvo-ddc-instead-of-intel_sdvo-i2c-for-ddc.patch
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