This commit introduces the `SPLASH_SCREEN_FOOTER` Kconfig option,
enabling a custom footer image or logo on the firmware splash screen.
This provides an additional branding opportunity for device
manufacturers.
`soc_load_logo_by_coreboot()` now conditionally loads and renders
`footer_logo.bmp` when this option is enabled. The footer logo is
positioned at the bottom of the screen.
A new `SPLASH_SCREEN_FOOTER_LOGO_PATH` Kconfig option is added to
define the footer logo's file path. It defaults to a mainboard-specific
location. `Makefile.mk` is updated to ensure this logo is included in
the CBFS.
This additional branding is made possible by rendering bitmaps using
coreboot's native implementation (`USE_COREBOOT_FOR_BMP_RENDERING`).
FSP currently lacks the necessary callbacks to support this feature.
Currently, the OEM footer branding will appear even when the
system is booting in low-battery mode. A planned update will fix this
by exiting early from the boot process, preventing the footer from
showing and conserving power.
BUG=b:423591644
TEST=Able to display custom footer logo on boot.
Change-Id: I57f8af910e8b8f56e8a4a88f8cca6d60fad380b6
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88029
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
4373eea5d8