From f5a3d0c4086d1854cbda545092c462b84cba20ce Mon Sep 17 00:00:00 2001
From: Matthew Garrett <mjg@redhat.com>
Date: Tue, 12 Jul 2011 18:30:52 -0400
Subject: i915: Fix opregion notifications

opregion-based platforms will send ACPI video event 0x80 for a range of
notification types for legacy compatibility. This is interpreted as a
display switch event, which may not be appropriate in the circumstances.
When we receive such an event we should make sure that the platform is
genuinely requesting a display switch before passing that event through
to userspace.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Tested-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
---
 include/acpi/video.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'include/acpi')

diff --git a/include/acpi/video.h b/include/acpi/video.h
index 0e98e679d3a7..61109f2609fc 100644
--- a/include/acpi/video.h
+++ b/include/acpi/video.h
@@ -5,6 +5,8 @@
 
 struct acpi_device;
 
+#define ACPI_VIDEO_CLASS	"video"
+
 #define ACPI_VIDEO_DISPLAY_CRT  1
 #define ACPI_VIDEO_DISPLAY_TV   2
 #define ACPI_VIDEO_DISPLAY_DVI  3
-- 
cgit v1.2.3-70-g09d2