[ 3.5.y.z extended stable ] Patch "drm/gma500: fix backlight hotkeys behaviour on netbooks" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    drm/gma500: fix backlight hotkeys behaviour on netbooks

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From e8bb1b9c1a763b61850d4f66afaccc62c823cd16 Mon Sep 17 00:00:00 2001
From: Anisse Astier <anisse at astier.eu>
Date: Wed, 24 Apr 2013 17:36:01 +0200
Subject: [PATCH] drm/gma500: fix backlight hotkeys behaviour on netbooks

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 at astier.eu>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson at gmail.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/gpu/drm/gma500/psb_irq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/gma500/psb_irq.c b/drivers/gpu/drm/gma500/psb_irq.c
index 8652cdf..029eccf 100644
--- 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
--
1.8.1.2