Refer to Uefi spec 2.10 section 13.3.3, Add a new retval
EFI_UNSUPPORTED to EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.ReadKeyStrokeEx
and EFI_SIMPLE_TEXT_INPUT_PROTOCOL.ReadKeyStroke().

Cc: Leif Lindholm <quic_llind...@quicinc.com>
Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
Cc: Abner Chang <abner.ch...@amd.com>
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Signed-off-by: Qingyu <qingyu.sh...@intel.com>
---
 .../Drivers/VirtualKeyboardDxe/VirtualKeyboard.c       | 10 ++++++----
 .../Drivers/VirtualKeyboardDxe/VirtualKeyboard.h       | 10 ++++++----
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboard.c 
b/EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboard.c
index 4bbc3ead2c87..48a99566df63 100644
--- a/EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboard.c
+++ b/EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboard.c
@@ -694,11 +694,12 @@ KeyboardReadKeyStrokeWorker (
 /**
   Read out the scan code of the key that has just been stroked.
 
-  @param  This        Pointer of simple text Protocol.
-  @param  Key         Pointer for store the key that read out.
+  @param  This              Pointer of simple text Protocol.
+  @param  Key               Pointer for store the key that read out.
 
-  @retval EFI_SUCCESS The key is read out successfully.
-  @retval other       The key reading failed.
+  @retval EFI_SUCCESS       The key is read out successfully.
+  @retval other             The key reading failed.
+  @retval EFI_UNSUPPORTED   The device does not support the ability to read 
keystroke data.
 
 **/
 EFI_STATUS
@@ -752,6 +753,7 @@ VirtualKeyboardReadKeyStroke (
   @retval  EFI_DEVICE_ERROR      The keystroke information was not returned
                                  due to hardware errors.
   @retval  EFI_INVALID_PARAMETER KeyData is NULL.
+  @retval  EFI_UNSUPPORTED       The device does not support the ability to 
read keystroke data.
 
 **/
 EFI_STATUS
diff --git a/EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboard.h 
b/EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboard.h
index f72bd6f9c6cc..25063c262721 100644
--- a/EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboard.h
+++ b/EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboard.h
@@ -496,11 +496,12 @@ KeyNotifyProcessHandler (
 /**
   Read out the scan code of the key that has just been stroked.
 
-  @param  This        Pointer of simple text Protocol.
-  @param  Key         Pointer for store the key that read out.
+  @param  This              Pointer of simple text Protocol.
+  @param  Key               Pointer for store the key that read out.
 
-  @retval EFI_SUCCESS The key is read out successfully.
-  @retval other       The key reading failed.
+  @retval EFI_SUCCESS       The key is read out successfully.
+  @retval other             The key reading failed.
+  @retval EFI_UNSUPPORTED   The device does not support the ability to read 
keystroke data.
 
 **/
 EFI_STATUS
@@ -523,6 +524,7 @@ VirtualKeyboardReadKeyStroke (
   @retval  EFI_DEVICE_ERROR      The keystroke information was not returned 
due to
                                  hardware errors.
   @retval  EFI_INVALID_PARAMETER KeyData is NULL.
+  @retval  EFI_UNSUPPORTED       The device does not support the ability to 
read keystroke data.
 
 **/
 EFI_STATUS
-- 
2.39.1.windows.1



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