Dear joeyli,
> 於 日，2012-05-27 於 23:45 +0800，joeyli 提到：
>
> > 於 日，2012-05-27 於 10:28 +0200，Marek Vasut 提到：
> >
> > > Dear joeyli,
> > >
> > > > > Hi Marek,
> > > > >
> > > > > 於 一，2012-05-07 於 21:38 +0200，Marek Vasut 提到：
> > > > >
> > > > > > > > > Now it gets interesting ;-)
> > > > > > > > >
> > > > > > > > > The obj->buffer.pointer contains the following:
> > > > > > > > > 0x05 0x01 0x00 0x00 0x00 0x00 0x00 0x00
> > > > > > > > >
> > > > > > > > > That means, return_value.function is 0x05, instead of 0x01
> > > > > > > > > (WMID_HOTKEY_EVENT).
> > > > > > > >
> > > > > > > > Yes, the 0x05 event is a event reflect to g-sensor, but I
> > > > > > > > don't have any hardware can test it.
> > > > > > > >
> > > > > > > > Did you see any other value but not just "0x05 0x01 0x00 0x00
> > > > > > > > 0x00 0x00 0x00 0x00" ?
> > > > > > >
> > > > > > > Nope, nothing at all. I flipped it back and forth, no result :(
> > > > > > >
> > > > > > > > I mean if you invert your table, did you see other return
> > > > > > > > value? The return data must point to Portrait or Landscape
> > > > > > > > view.
> > > > > > >
> > > > > > > Nope, still zeroes. This is only some interrupt-like event I
> > > > > > > believe. My opinion is, I need to call some WMI method to
> > > > > > > actually read-back the data.
>
> ...
>
> > > > > Sorry! I am sticking on another critical issue. I will find a time
> > > > > to trace TAB's DSDT at this week.
> > > >
> > > > No need to be sorry, I know exactly what you mean :) No need to rush,
> > > > I'm stuck with a few bugs at work too.
> > >
> > > Hi, I'm starting to get curious again. Did you had time to look into
> > > it? Thanks in advance!
> >
> > Sorry for I am late to reply you!
>
> ...
>
> > I checked your DSDT, unfortunately I found the logic is empty for
> > G-sesor in W500's DSDT.
> >
> > I mean, that's right we got only g-sensor event but didn't have sensor
> > state data, because they didn't put the return value in DSDT!
> >
> > On you TAB W500, the _Q7C method should run by EC when G-sensor detected
> >
> > state change:
> > Method (_Q7C, 0, NotSerialized)
> > {
> >
> > If (LEqual (^^SENR.GSLC, Zero)) /* G
> > sensor enabled? */ {
> >
> > Store (0x05, Index (^^^WMID.FEBC, Zero)) /* 0x05
> > is Sensor Event */ Store (One, Index (^^^WMID.FEBC,
> > One)) /* 0x01 is G-Sensor */ Notify (WMID,
> > 0xBC)
> >
> > }
> >
> > If (LMST)
> > {
> >
> > Return (Zero)
> >
> > }
> >
> > }
> >
> > You can enable ACPI debug message to verify _Q7C method run when you
> > reverse TAB, add the
> >
> > following kernel parameter and reboot:
> > acpi.debug_level=0x0000000F acpi.debug_layer=0xffffffff log_buf_len=5M
> >
> > The WMI event code in DSDT like this:
> > Method (EVBC, 0, NotSerialized) /* call by _WED
> > */ {
> >
> > ...
> >
> > If (LEqual (Local0, One)) /* hotkey event
> > */ {
> >
> > ...
> >
> > If (LEqual (Local0, 0x05)) {}
> > /* 0x05 is Sensor Event, why empty? */
> >
> > ...
> >
> > Store (Zero, Index (FEBC, 0x04)) /* all set to
zero */
> > Store (Zero, Index (FEBC, 0x05))
> > Store (Zero, Index (FEBC, 0x06))
> > Store (Zero, Index (FEBC, 0x07))
> >
> > ...
> >
> > Return (FEBC)
> >
> > }
> >
> > That's why we receive a G-sensor event but didn't have orientation
> > information of TAB. On windows platform, I believe there have another
> > driver listen and handle this g-sensor event when tab turned.
>
> OK, there havse a "BST0001" acpi device should handle by a g-sensor
> driver or a special acpi driver:
>
> Scope (_SB.PCI0.LPC0)
> {
> Device (SENR)
> {
> Name (_HID, "BST0001")
> Name (_UID, Zero)
> Name (_STA, 0x0F)
> Name (GSLC, Zero) /* G-sensor lock? */
> Name (GSLX, Zero) /* X */
> Name (GSLY, Zero) /* Y */
> Name (GSLZ, Zero) /* Z */
> ...
> Method (_INI, 0, NotSerialized)
> ...
> Method (RDST, 0, NotSerialized)
> {
> ...
> Method (RDVL, 0, NotSerialized)
> {
> ...
> Method (WRVL, 1, NotSerialized)
> {
> ...
>
>
> There have 3 methods "RDST", "RDVL" and "WRVL", currently, no idea for
> what functions provided by those 3 methods.
>
> my _GUESS_:
> "RDST" is read state?
> "RDVL" is read value(what!?)
> "WRVL" is write value?
>
> My idea is just find out which method is for read the orientation of
> G-sensor then we can use a driver raise it to userland.
Well, I'm getting somewhere, thanks for all your hints, they really blasted me
forward!
So, calling the _INI function, I get value of the G-Sensor kill switch (there's
a toggle on the bottom of the tablet to enable/disable input from the
accelerometer). So _INI returns integer, 0 for GS enabled, 1 for GS disabled. I
didn't get further (yet). Will keep you in loop!
Thanks!
>
> Thanks a lot!
> Joey Lee
Best regards,
Marek Vasut
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