hybrid-graphics-linux team mailing list archive

[Joaquín Ignacio Aramendía <samsagax@xxxxxxxxx>]

Maybe you should look into vga_switcheroo code. As the dmesg suggest, it
founds DSM methods to handle the card automatically.
-- 
Joaquín Ignacio Aramendía <samsagax@xxxxxxxxx>

El mar, 25-10-2011 a las 16:45 +0200, Bruno Pagani escribió:
> They look to be ever the same, however I would prefer us to totally 
> reverse the code before starting to make it automatic.
> 
> Le 25/10/2011 16:23, Albert Vilella a écrit :
> > Hi Lekensteyn,
> >
> > These are great developments, great effort. I wonder, not knowing much
> > about the internals of this, how generic are these calls to _DSM
> > methods? Could someone write the correct _DSM calls for each any
> > hybrid laptop with a _DSM method? Or is there any way to test the
> > different parameters and see which one does something to the graphics
> > card?
> >
> > Cheers
> >
> > On Sun, Oct 23, 2011 at 12:30 PM, Lekensteyn<lekensteyn@xxxxxxxxx>  wrote:
> >> Hi Eric,
> >>
> >> I'm attaching my notes for digging in my own tables as well as the
> >> disassembled tables you sent me before.
> >> The TableID of SSDT5.dsl is OptTabl (OptimusTable?) and the methods and
> >> devices in it suggests that it is relevant.
> >>
> >> A quick overview on that views revealed some interesting methods:
> >>
> >> - \_SB.PCI0.PEG0.PEGP._DSM calls \_SB.PCI0.GFX0.HDSM (Arg0, Arg1, Arg2,
> >> Arg3) and returns the return value from that method
> >> - \_SB.PCI0.GFX0.HDSM
> >> If arg 0 equals to the buffer
> >>      0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47, 0xA7, 0x2B, 0x60, 0x42,
> >> 0xA6, 0xB5, 0xBE, 0xE0
> >> then OPCI becomes One.
> >>
> >> If OPCI is One OR if SGCI or NBCI are One (which is never the case), the
> >> next continues:
> >>
> >> If arg1 (the revision number) does not equal 0x100 0x80000002 is returned
> >> (which is btw the value returned on errors).
> >>
> >> Arg 2 is the function, func 0 returns a 4-byte buffer depending on some
> >> register values
> >> func 1 returns a buffer with four 0x0 (in this case)
> >> ... there are other methods but I'm not going to analyse all of them for
> >> now..
> >> func 0x03 is what we're looking for.
> >>
> >> Arg3 is converted to an integer, taking the first 8 bytes of the buffer as
> >> an integer (forming a 64-bit one). On that integer, the least two bits are
> >> significant.
> >> if it's 0, \_SB.PCI0.PEG0.PEGP.SGST is called (status?),
> >> if it's 1, \_SB.PCI0.PEG0.PEGP.SGON is called (turn something on?),
> >> if it's 2,  \_SB.PCI0.PEG0.PEGP.SGOFF is called (turn sth. off?)
> >>
> >> After that, if the result of \_SB.PCI0.PEG0.PEGP.SGST equals 0x0F, a buffer
> >> of 0x0, 0x2, 0x0, 0x0 is returned. Otherwise, a buffer of 4 zeros is
> >> returned.
> >>
> >> The method becomes:
> >> \_SB.PCI0.PEG0.PEGP._DSM
> >> {0xF8,0xD8,0x86,0xA4,0xDA,0x0B,0x1B,0x47,0xA7,0x2B,0x60,0x42,0xA6,0xB5,0xBE,0xE0}
> >> 0x100 0x3 {0x00,0x00,0x0,0x1}
> >> The above is for turning it n, replace the last 0x1 by 0x2 for turning it
> >> off (theoretically)
> >>
> >> Some methods may return a Package as result ("Object type 0x4"). If you
> >> encounter that, use acpi_call from
> >> https://github.com/Bumblebee-Project/acpi_call. I'll soon make it available
> >> in the bumblebee/testing PPA.
> >>
> >> I wish there was a register/ method documentation somewhere, that would help
> >> a lot with analysing.
> >>
> >> Regards,
> >> Lekensteyn
> >>
> >> On Sun, Oct 23, 2011 at 5:56 AM, Eric Appleman<erappleman@xxxxxxxxx>  wrote:
> >>> Consult the following for background and logs:
> >>> https://github.com/Bumblebee-Project/Bumblebee/issues/133
> >>>
> >>> Is there anyone here who is well-versed in ACPI who'd be willing to look
> >>> at my tables as well as those of similarly arranged machines?
> >>>
> >>> Thanks in advance.
> >>>
> >>> - Eric Appleman, Bumblebee Project
> >>>
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> >>
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> >>
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