https://github.com/torvalds/linux
Revision 77076c7aac0184cae2d8a358cf6e6ed1f195fe3f authored by Aaron Lu on 26 September 2014, 02:30:08 UTC, committed by Rafael J. Wysocki on 29 September 2014, 23:11:18 UTC
Some of the Thinkpads' firmware will issue a backlight change request through i915 operation region unconditionally on AC plug/unplug, the backlight level used is arbitrary and thus should be ignored. This is handled by commit 0b9f7d93ca61 (ACPI / i915: ignore firmware requests for backlight change). Then there is a Dell laptop whose vendor backlight interface also makes use of operation region to change backlight level and with the above commit, that interface no long works. The condition used to ignore the backlight change request from firmware is thus changed to: if the vendor backlight interface is not in use and the ACPI backlight interface is broken, we ignore the requests; oterwise, we keep processing them. Fixes: 0b9f7d93ca61 (ACPI / i915: ignore firmware requests for backlight change) Link: https://lkml.org/lkml/2014/9/23/854 Reported-and-tested-by: Pali Rohár <pali.rohar@gmail.com> Cc: 3.16+ <stable@vger.kernel.org> # 3.16+ Signed-off-by: Aaron Lu <aaron.lu@intel.com> Acked-by: Daniel Vetter <daniel@ffwll.ch> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1 parent fe82dce
Tip revision: 77076c7aac0184cae2d8a358cf6e6ed1f195fe3f authored by Aaron Lu on 26 September 2014, 02:30:08 UTC
ACPI / i915: Update the condition to ignore firmware backlight change request
ACPI / i915: Update the condition to ignore firmware backlight change request
Tip revision: 77076c7
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| block | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .gitignore | -rw-r--r-- | 1.1 KB |
| .mailmap | -rw-r--r-- | 4.7 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 93.8 KB |
| Kbuild | -rw-r--r-- | 2.5 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 279.7 KB |
| Makefile | -rw-r--r-- | 52.8 KB |
| README | -rw-r--r-- | 18.3 KB |
| REPORTING-BUGS | -rw-r--r-- | 7.3 KB |
Computing file changes ...
