[PATCH v2 0/3] Fix Win8 backlight issue
aaron.lu at intel.com
Tue Sep 17 18:03:49 PDT 2013
On 09/17/2013 09:34 PM, Igor Gnatenko wrote:
> On Tue, 2013-09-17 at 17:23 +0800, Aaron Lu wrote:
>> 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 three 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 1/3 for details.
>> Then patch 2/3 does the cleanup to sepeate the backlight control and
>> event delivery functionality in the ACPI video module and patch 3/3
>> 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.
>> Technically, patch 2/3 is not required to fix the issue here. So if you
>> think it is not necessary, I can remove it from the series.
>> Apply on top of v3.12-rc1.
>> Aaron Lu (3):
>> backlight: introduce backlight_device_registered
>> ACPI / video: seperate backlight control and event interface
>> ACPI / video: Do not register backlight if win8 and native interface
>> drivers/acpi/internal.h | 5 +-
>> drivers/acpi/video.c | 442 ++++++++++++++++++++----------------
>> drivers/acpi/video_detect.c | 14 +-
>> drivers/video/backlight/backlight.c | 31 +++
>> include/acpi/video.h | 2 +
>> include/linux/backlight.h | 4 +
>> 6 files changed, 300 insertions(+), 198 deletions(-)
> Aaron, how about fix indicator on ThinkPads ?
Can you please describe the problem in detail, is it that when you
adjust brightness level through hotkey, there is no GUI indication?
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