[Intel-gfx] [PATCH v4 0/4] Fix Win8 backlight issue
aaron.lu at intel.com
Tue Oct 8 08:39:57 CEST 2013
Remove decleration and stub for acpi_video_unregister_backlight in
video.h of patch 2/4 since that function doesn't exist anymore in v3.
1 Add a new patch 4/4 to fix some problems in thinkpad-acpi module;
2 Remove unnecessary function acpi_video_unregister_backlight introduced
in patch 2/4 as pointed out by Jani Nikula.
v1 has the subject of "Rework ACPI video driver" and is posted here:
Since the objective is really to fix Win8 backlight issues, I changed
the subject in this version, sorry about that.
This patchset has four patches, the first introduced a new API named
backlight_device_registered in backlight layer that can be used for
backlight interface provider module to check if a specific type backlight
interface has been registered, see changelog for patch 1/4 for details.
Then patch 2/4 does the cleanup to sepeate the backlight control and
event delivery functionality in the ACPI video module and patch 3/4
solves some Win8 backlight control problems by avoiding register ACPI
video's backlight interface if:
1 Kernel cmdline option acpi_backlight=video is not given;
2 This is a Win8 system;
3 Native backlight control interface exists.
Patch 4/4 fixes some problems in thinkpad-acpi module.
Technically, patch 2/4 is not required to fix the issue here. So if you
think it is not necessary, I can remove it from the series.
Aaron Lu (4):
backlight: introduce backlight_device_registered
ACPI / video: seperate backlight control and event interface
ACPI / video: Do not register backlight if win8 and native interface
thinkpad-acpi: fix handle locate for video and query of _BCL
drivers/acpi/internal.h | 5 +-
drivers/acpi/video.c | 442 ++++++++++++++++++++---------------
drivers/acpi/video_detect.c | 14 +-
drivers/platform/x86/thinkpad_acpi.c | 31 ++-
drivers/video/backlight/backlight.c | 31 +++
include/linux/backlight.h | 4 +
6 files changed, 322 insertions(+), 205 deletions(-)
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