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author | Siyuan Wang <wangsiyuanbuaa@gmail.com> | 2013-06-05 14:32:51 +0800 |
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committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2013-06-13 01:15:35 +0200 |
commit | d2ae6ae7898b00425ace91ebb835299c18a5ad50 (patch) | |
tree | 1ba53738ec439780dc63e9855dc532a9f533e9fb /src/cpu/amd/mtrr | |
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/cpu/amd/mtrr')
0 files changed, 0 insertions, 0 deletions