On Friday, November 10, 2017 12:30:46 AM CET Bastien Nocera wrote:
> On Thu, 2017-11-09 at 23:44 +0100, Stefan Brüns wrote:
> > The Rotate Lock button event is emitted on the XPS 12 (BIOS A8, but
> > not
> > on BIOS A2).
> >
> > Signed-off-by: Stefan Brüns <stefan.bruens@xxxxxxxxxxxxxx>
> > ---
> >
> > Changes in v2:
> > - Emit KEY_ROTATE_LOCK_TOGGLE instead of KEY_ROTATE_DISPLAY
> > - Use separate up/down events
> >
> > drivers/platform/x86/intel-vbtn.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/platform/x86/intel-vbtn.c
> > b/drivers/platform/x86/intel-vbtn.c index e3f6375af85c..a484bcc6393b
> > 100644
> > --- a/drivers/platform/x86/intel-vbtn.c
> > +++ b/drivers/platform/x86/intel-vbtn.c
> > @@ -42,6 +42,8 @@ static const struct key_entry intel_vbtn_keymap[] = {
> >
> > { KE_IGNORE, 0xC5, { KEY_VOLUMEUP } }, /* volume-up key release */
> > { KE_KEY, 0xC6, { KEY_VOLUMEDOWN } }, /* volume-down key press */
> > { 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 */
> How are those events sent? When pressing and releasing the key, do you
> receive 0xC8 followed by 0xC9? Or do you receive 0xC8 when pressing and
> releasing the first time, and 0xC9 when pressing and releasing a second
> time?
>
> If the former, then it's not going to work. The release is supposed to
> be ignored, as you send the event with sparse_keymap_report_event().
>
> If the latter, and there's an actual state, does it disable a device
> on-board, or activate an LED? If so, then it would need to be a switch,
> not a key.
Do you think I don't test the patches before sending? Let me tell you, it
*does* work.
You could also read the cover letter, where you find more details, putting the
patches in relation to each other.
Just in case its not yet clear:
The codes are emitted when pressing a button. It is a button, not a switch.
There is no state handled in hardware. On press (as noted by the code
comment), event code 0xc8 is emitted. On release, event code 0xc9 is emitted.
Regards,
Stefan
--
Stefan Brüns / Bergstraße 21 / 52062 Aachen
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