[U-Boot] [PATCH 1/1] efi_loader: remove deprecated ConsoleControlProtocol

[Heinrich Schuchardt]

On 03/09/2018 02:23 PM, Alexander Graf wrote:
> On 03/03/2018 03:41 PM, Heinrich Schuchardt wrote:
>> The console control protocol is not defined in the UEFI standard.
>>
>> It exists in EDK2's EdkCompatiblityPkg package. But this package
>> is deprecated according to
>> https://github.com/tianocore/tianocore.github.io/wiki/Differences-between-EDK-and-EDK-II
>>
>>
>> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> 
> Grub uses it, but I can confirm that the code path it's using it in is
> perfectly happy with it not being available. So I think it's safe to
> remove.
> 
> 
> Alex
> 
> 

Even the very first UEFI spec (2.0, 2006) did not contain the
ConsoleControlProtocol.

Grub is trying to switch the console to text mode (see function
grub_efi_set_text_mode()).  With UEFI text output is always available.
This is why the protocol was obsoleted by UEFI. The current grub coding
that allows to live without the console control protocol was introduced
in 2006 in response to the first UEFI spec.

Regards

Heinrich