Usually the debug serial connection only uses two wires. However when
the controller at the other end is honoring hardware flow control
signals, it is necessary for the PciSioSerialDxe to properly generate
the necessary signals. Turn on DTR and RTS during reset. Allow the
higher level application control these signals after the fact with the
SetControl interface.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Lee Leahy <leroy.p.le...@intel.com>
---
MdeModulePkg/Bus/Pci/PciSioSerialDxe/SerialIo.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/MdeModulePkg/Bus/Pci/PciSioSerialDxe/SerialIo.c
b/MdeModulePkg/Bus/Pci/PciSioSerialDxe/SerialIo.c
index f1870f3..07ee424 100644
--- a/MdeModulePkg/Bus/Pci/PciSioSerialDxe/SerialIo.c
+++ b/MdeModulePkg/Bus/Pci/PciSioSerialDxe/SerialIo.c
@@ -574,7 +574,7 @@ SerialReset (
//
// Go set the current control bits
//
- Control = 0;
+ Control = EFI_SERIAL_REQUEST_TO_SEND | EFI_SERIAL_DATA_TERMINAL_READY;
if (SerialDevice->HardwareFlowControl) {
Control |= EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;
}
--
1.9.1
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
