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/* SPDX-License-Identifier: GPL-2.0-only */
/* WARNING
* Switchable graphics not yet tested!
*/
/* Hybrid graphics enable/disable GPIO bitfields */
Name (HYG1, 0x004A0000)
Name (HYG2, 0x00020000)
/* GPIO control port */
Name (GPCP, DEFAULT_GPIOBASE)
/* GPIO control map */
OperationRegion (GPCM, SystemIO, GPCP, 0x3F)
Field (GPCM, ByteAcc, NoLock, Preserve) {
GPUS, 32,
GPIS, 32,
Offset (0x0C),
GPLV, 32,
Offset (0x30),
GQUS, 32,
GQIS, 32,
GQLV, 32
}
Method(SHYB, 1) {
/* Switch hybrid graphics */
if (Arg0 == 1)
{
/* Discrete graphics requested */
GPLV |= HYG1
GQLV |= HYG2
}
else
{
/* Integrated graphics requested */
Local0 = HYG1 ^ 0xFFFFFFFF
GPLV &= Local0
Local0 = HYG2 ^ 0xFFFFFFFF
GQLV &= Local0
}
}
Method (ATPX, 2, Serialized) {
/* Create local variables */
Name (ATPR, Buffer (0x08) {
0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0
})
CreateWordField (ATPR, 0x00, SIZE)
CreateWordField (ATPR, 0x02, VERS)
CreateDWordField (ATPR, 0x04, FUNC)
/* Version request */
if (Arg0 == 0x0)
{
/* Assemble and return version information */
SIZE = 0x08 /* Response length */
VERS = 0x01 /* Version number */
FUNC = 0x0F /* Supported functions? */
Return (ATPR)
}
/* Mux select */
if (Arg0 == 0x2)
{
CreateByteField (Arg1, 0x02, PWST)
Local0 = PWST
Local0 &= 0x01
If (Local0)
{
/* Enable discrete graphics */
SHYB(0x01)
}
else
{
/* Enable integrated graphics */
SHYB(0x00)
}
}
Return(Zero)
}
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