diff options
| author | Siyuan Wang <wangsiyuanbuaa@gmail.com> | 2013-06-05 14:32:51 +0800 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2013-06-13 01:15:35 +0200 |
| commit | d2ae6ae7898b00425ace91ebb835299c18a5ad50 (patch) | |
| tree | 1ba53738ec439780dc63e9855dc532a9f533e9fb /src/mainboard/amd | |
| parent | 59d0d159f4710779043e34618a20dccff2af51dd (diff) | |
AMD Thatcher: fix issue 'S3 fails to suspend after wake up from USB keyboard'
This issue can be reproduced in Linux by the following steps:
1) use pm-suspend to suspend.
2) use USB keyboard to wake up.
3) use pm-suspend to suspend. FAIL To SUSPEND.
The cause of this issue is:
USB devices use bit 11(0x0b) of GP0_STS represents S3 wake up event,
but this bit is not clear after wake up. So OS thinks there is a
wake up signal and wake up immediately.
In this patch, I add AcpiGpe0Blk using MMIO access and write 1
on bit 11. Write 1 to clear as spec says.
I have tested on Thatcher
The same change was done for AMD Parmer in commit »AMD Parmer:
fix issue 'S3 fails to suspend after wake up from USB keyboard'
(03901124) [1].
[1] http://review.coreboot.org/#/c/3347/
(Change-Id: Iec3078bf29de99683e7cd3ef4e178fbeb4dc09c1)
Change-Id: Iaef39237497ef896d0f186e8f5522222c0ce6cb7
Signed-off-by: Siyuan Wang <SiYuan.Wang@amd.com>
Signed-off-by: Siyuan Wang <wangsiyuanbuaa@gmail.com>
Reviewed-on: http://review.coreboot.org/3374
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/mainboard/amd')
| -rw-r--r-- | src/mainboard/amd/thatcher/dsdt.asl | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/mainboard/amd/thatcher/dsdt.asl b/src/mainboard/amd/thatcher/dsdt.asl index 7f08bbb350..e48c9cf0a6 100644 --- a/src/mainboard/amd/thatcher/dsdt.asl +++ b/src/mainboard/amd/thatcher/dsdt.asl @@ -202,6 +202,14 @@ DefinitionBlock ( /* PM1 Event Block * First word is PM1_Status, Second word is PM1_Enable */ + + /* AcpiGpe0Blk */ + OperationRegion(GP0B, SystemMemory, 0xfed80814, 0x04) + Field(GP0B, ByteAcc, NoLock, Preserve) { + , 11, + USBS, 1, + } + Scope(\_SB) { /* PCIe Configuration Space for CONFIG_MMCONF_BUS_NUMBER busses */ OperationRegion(PCFG, SystemMemory, PCBA, PCLN) @@ -844,6 +852,8 @@ DefinitionBlock ( * Store(Arg0, Index(WKST,1)) * } */ + /* clear USB wake up signal */ + Store(1, USBS) Return(WKST) } /* End Method(\_WAK) */ |