This is a note to let you know that I've just added the patch titled
drm/i915: Take modeset locks around intel_modeset_setup_hw_state()
to the 3.12-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-take-modeset-locks-around-intel_modeset_setup_hw_state.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 027476642811f8559cbe00ef6cc54db230e48a20 Mon Sep 17 00:00:00 2001
From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Mon, 2 Dec 2013 11:08:06 +0200
Subject: drm/i915: Take modeset locks around intel_modeset_setup_hw_state()
From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
commit 027476642811f8559cbe00ef6cc54db230e48a20 upstream.
Some lower level things get angry if we don't have modeset locks
during intel_modeset_setup_hw_state(). Actually the resume and
lid_notify codepaths alreday hold the locks, but the init codepath
doesn't, so fix that.
Note: This slipped through since we only disable pipes if the
plane/pipe linking doesn't match. Which is only relevant on older
gen3 mobile machines, if the BIOS fails to set up our preferred
linking.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Tested-and-reported-by: Paul Bolle <pebolle@xxxxxxxxxx>
[danvet: Add note now that I could confirm my theory with the log
files Paul Bolle provided.]
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10592,7 +10592,9 @@ void intel_modeset_gem_init(struct drm_d
intel_setup_overlay(dev);
+ drm_modeset_lock_all(dev);
intel_modeset_setup_hw_state(dev, false);
+ drm_modeset_unlock_all(dev);
}
void intel_modeset_cleanup(struct drm_device *dev)
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-3.12/drm-i915-take-modeset-locks-around-intel_modeset_setup_hw_state.patch
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