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Ps2KbdCtrller: Make wait for SUCCESS after BAT non-fatal

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Recent model Chromebooks only return ACK, but not
BAT_SUCCESS, which causes hanging and failed ps2k init.
To mitigate this, make the absence of BAT_SUCCESS reply
non-fatal, and reduce the no-reply timeout from 4s to 1s.

Tested on google/dracia and purism/librem_14

Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: Ib644f6797eb50eb3bb75235ac48ddb6096a7bd6d
This commit is contained in:
Matt DeVillier
2021-05-26 17:33:29 -05:00
committed by Tim Crawford
parent 792844cb3b
commit 0f49a3fc87
2 changed files with 2 additions and 6 deletions
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2
MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h
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@@ -157,7 +157,7 @@ InstallPs2KeyboardDriver (
#define KEYBOARD_MAX_TRY 256 // 256
#define KEYBOARD_TIMEOUT 65536 // 0.07s
#define KEYBOARD_WAITFORVALUE_TIMEOUT 1000000 // 1s
#define KEYBOARD_BAT_TIMEOUT 4000000 // 4s
#define KEYBOARD_BAT_TIMEOUT 1000000 // 1s
#define KEYBOARD_TIMER_INTERVAL 200000 // 0.02s
#define SCANCODE_EXTENDED0 0xE0
#define SCANCODE_EXTENDED1 0xE1