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| author | Matt Delco <delco@chromium.org> | 2018-06-25 03:29:40 +0300 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2018-07-02 16:48:22 +0300 |
| commit | 4f5e81a7a68afa7c0a943ab42c61b00a21913db2 (patch) | |
| tree | 03b390be425b42e464a98ded78d97bcbb7304ff1 /drivers/platform/mips | |
| parent | 5bf24e20d18f8335420149894988b2501d70319f (diff) | |
| download | linux-4f5e81a7a68afa7c0a943ab42c61b00a21913db2.tar.xz | |
platform/x86: intel-vbtn: Add support for dock mode detection
The Dell laptop I have has an ACPI that sends 0xCB and 0xCC on entering
tablet mode. On exiting tablet mode it sends 0xCA and 0xCD. Based on:
http://www.traby.de/medion/DSDT/dsdt.dsl
https://gist.github.com/jprvita/5737de3cbb670e80973b7d4e51c38ab6
https://osdn.net/projects/android-x86/scm/git/kernel/commits/
7cbe5a330687b851f32dd9f1048a6ce182d0ff44
It appears that 0xCA and 0xCB are about dock mode, which for my
convertible laptop seems questionably tied to whether I've put
the laptop in tablet or laptop mode. I previously proposed no-oping
0xCA and 0xCB but this revised change attempts to add support for
detecting dock mode--this detection will essentially be broken for
my laptop (the main workaround would be for 0xCA and 0xCB to be used
to provoke a query of the VGBS method that reports the current dock &
tablet mode [which is accurately reported on my laptop but based on
the prior workarounds in the driver it apparently can't be trusted
for all systems]).
Signed-off-by: Matt Delco <delco@chromium.org>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: platform-driver-x86@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: AceLan Kao <acelan.kao@canonical.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/platform/mips')
0 files changed, 0 insertions, 0 deletions