x86: pci: Allow conditionally run VGA rom in S3
Introduce a new CONFIG_S3_VGA_ROM_RUN option so that U-Boot can
bypass executing VGA roms in S3.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Stefan Roese <sr@denx.de>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5322eff..0cd981e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -601,6 +601,18 @@
is done, U-Boot needs to find out the wakeup vector provided by OSes
and jump there.
+config S3_VGA_ROM_RUN
+ bool "Re-run VGA option ROMs on S3 resume"
+ depends on HAVE_ACPI_RESUME
+ default y if HAVE_ACPI_RESUME
+ help
+ Execute VGA option ROMs in U-Boot when resuming from S3. Normally
+ this is needed when graphics console is being used in the kernel.
+
+ Turning it off can reduce some resume time, but be aware that your
+ graphics console won't work without VGA options ROMs. Set it to N
+ if your kernel is only on a serial console.
+
config STACK_SIZE
hex
depends on HAVE_ACPI_RESUME