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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

Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
This commit is contained in:
Matt DeVillier
2021-05-26 17:33:29 -05:00
committed by Tim Crawford
parent 7386ad5ae3
commit 8c767bb014
1 changed files with 1 additions and 7 deletions
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8
MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdCtrller.c
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@ -1709,13 +1709,7 @@ InitKeyboard (
//
// wait for BAT completion code
//
mWaitForValueTimeOut = KEYBOARD_BAT_TIMEOUT;
Status = KeyboardWaitForValue (ConsoleIn, KEYBOARD_8048_RETURN_8042_BAT_SUCCESS);
if (EFI_ERROR (Status)) {
KeyboardError (ConsoleIn, L"Keyboard self test failed!\n\r");
goto Done;
}
KeyboardWaitForValue (ConsoleIn, KEYBOARD_8048_RETURN_8042_BAT_SUCCESS);
mWaitForValueTimeOut = KEYBOARD_WAITFORVALUE_TIMEOUT;