diff options
| author | Matt Delco <delco@chromium.org> | 2018-06-24 17:29:40 -0700 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2018-07-02 16:48:22 +0300 |
| commit | 4f5e81a7a68afa7c0a943ab42c61b00a21913db2 (patch) | |
| tree | 03b390be425b42e464a98ded78d97bcbb7304ff1 /drivers/platform | |
| parent | 5bf24e20d18f8335420149894988b2501d70319f (diff) | |
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')
| -rw-r--r-- | drivers/platform/x86/intel-vbtn.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c index c13780b8dabb..06cd7e818ed5 100644 --- a/drivers/platform/x86/intel-vbtn.c +++ b/drivers/platform/x86/intel-vbtn.c @@ -17,6 +17,7 @@ /* When NOT in tablet mode, VGBS returns with the flag 0x40 */ #define TABLET_MODE_FLAG 0x40 +#define DOCK_MODE_FLAG 0x80 MODULE_LICENSE("GPL"); MODULE_AUTHOR("AceLan Kao"); @@ -38,6 +39,8 @@ static const struct key_entry intel_vbtn_keymap[] = { { KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } }, /* volume-down key release */ { KE_KEY, 0xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* rotate-lock key press */ { KE_KEY, 0xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* rotate-lock key release */ + { KE_SW, 0xCA, { .sw = { SW_DOCK, 1 } } }, /* Docked */ + { KE_SW, 0xCB, { .sw = { SW_DOCK, 0 } } }, /* Undocked */ { KE_SW, 0xCC, { .sw = { SW_TABLET_MODE, 1 } } }, /* Tablet */ { KE_SW, 0xCD, { .sw = { SW_TABLET_MODE, 0 } } }, /* Laptop */ { KE_END }, @@ -121,6 +124,8 @@ static void detect_tablet_mode(struct platform_device *device) m = !(obj->integer.value & TABLET_MODE_FLAG); input_report_switch(priv->input_dev, SW_TABLET_MODE, m); + m = (obj->integer.value & DOCK_MODE_FLAG) ? 1 : 0; + input_report_switch(priv->input_dev, SW_DOCK, m); out: kfree(vgbs_output.pointer); } |