This is a note to let you know that I've just added the patch titled
drm/gma500: fix backlight hotkeys behaviour on netbooks
to the 3.9-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-gma500-fix-backlight-hotkeys-behaviour-on-netbooks.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e127dc28cc3057575da0216cde85687153ca180f Mon Sep 17 00:00:00 2001
From: Anisse Astier <anisse@xxxxxxxxx>
Date: Wed, 24 Apr 2013 17:36:01 +0200
Subject: drm/gma500: fix backlight hotkeys behaviour on netbooks
From: Anisse Astier <anisse@xxxxxxxxx>
commit e127dc28cc3057575da0216cde85687153ca180f upstream.
Backlight hotkeys weren't working before on certain cedartrail laptops.
The source of this problem is that the hotkeys' ASLE opregion interrupts
were simply ignored. Driver seemed to expect the interrupt to be
associated with a pipe, but it wasn't.
Accepting the ASLE interrupt without an associated pipe event flag fixes
the issue, the backlight code is called when needed, making the
brightness keys work properly.
[patrik: This patch affects irq handling on any netbook with opregion support]
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=833597
Reference: http://lists.freedesktop.org/archives/dri-devel/2012-July/025279.html
Signed-off-by: Anisse Astier <anisse@xxxxxxxxx>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/gma500/psb_irq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/gma500/psb_irq.c
+++ b/drivers/gpu/drm/gma500/psb_irq.c
@@ -211,7 +211,7 @@ irqreturn_t psb_irq_handler(DRM_IRQ_ARGS
vdc_stat = PSB_RVDC32(PSB_INT_IDENTITY_R);
- if (vdc_stat & _PSB_PIPE_EVENT_FLAG)
+ if (vdc_stat & (_PSB_PIPE_EVENT_FLAG|_PSB_IRQ_ASLE))
dsp_int = 1;
/* FIXME: Handle Medfield
Patches currently in stable-queue which might be from anisse@xxxxxxxxx are
queue-3.9/drm-gma500-fix-backlight-hotkeys-behaviour-on-netbooks.patch
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