diff options
| author | Matthew Garrett <mjg@redhat.com> | 2011-07-13 02:30:52 +0400 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-07-13 22:19:47 +0400 |
| commit | f5a3d0c4086d1854cbda545092c462b84cba20ce (patch) | |
| tree | a7ff24f477c618a7680bc617f12366656a0afe23 /drivers/acpi/video.c | |
| parent | 2bf71160f94270319eb965935045f825ec446e8a (diff) | |
| download | linux-f5a3d0c4086d1854cbda545092c462b84cba20ce.tar.xz | |
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>
Diffstat (limited to 'drivers/acpi/video.c')
| -rw-r--r-- | drivers/acpi/video.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index db39e9e607d8..ada4b4d9bdc8 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -46,7 +46,6 @@ #define PREFIX "ACPI: " -#define ACPI_VIDEO_CLASS "video" #define ACPI_VIDEO_BUS_NAME "Video Bus" #define ACPI_VIDEO_DEVICE_NAME "Video Device" #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 @@ -1445,7 +1444,8 @@ static void acpi_video_bus_notify(struct acpi_device *device, u32 event) case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, * most likely via hotkey. */ acpi_bus_generate_proc_event(device, event, 0); - keycode = KEY_SWITCHVIDEOMODE; + if (!acpi_notifier_call_chain(device, event, 0)) + keycode = KEY_SWITCHVIDEOMODE; break; case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video @@ -1475,7 +1475,8 @@ static void acpi_video_bus_notify(struct acpi_device *device, u32 event) break; } - acpi_notifier_call_chain(device, event, 0); + if (event != ACPI_VIDEO_NOTIFY_SWITCH) + acpi_notifier_call_chain(device, event, 0); if (keycode) { input_report_key(input, keycode, 1); |