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x86: Only enable EFI_CONSOLE if UART console is not enabled

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Most x86 build configurations enable the UART console. Since EFI console
has also defaulted to enabled, this means that the EFI covers the early
part of the boot until UART takes over.

This is all fine, except that enabling EFI console has the effect of
disabling PRINTK_SYNC. This in turn has the effect of causing garbled
output over UART, which has led to several bug reports on x86 platforms
(in particular on up_squared).

Since EFI console should really only be used for early platform bringup
and debugging purposes, it's not really ideal to unconditionally have it
enabled by default. Instead, change the default enabling to be
conditional to the UART console being disabled.

Fixes #54861
Fixes #55071

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Johan Hedberg 2023-11-24 13:38:02 +02:00 committed by Fabio Baltieri
parent 9aafc832a2
commit 084b8e4f97
1 changed files with 1 additions and 1 deletions
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2
arch/x86/Kconfig
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@ -472,7 +472,7 @@ config X86_EFI_CONSOLE
bool
depends on X86_EFI && X86_64 && !X86_VERY_EARLY_CONSOLE
select EFI_CONSOLE
default y
default y if !UART_CONSOLE
help
This enables the use of the UEFI console device as the
Zephyr printk handler. It requires that no interferences