This commit implements support for the FSP_VGA_MODE12_MONOCHROME
Kconfig option within the Panther Lake romstage code.
By checking for the CONFIG_FSP_VGA_MODE12_MONOCHROME option, we
set the corresponding VGA_INIT_CONTROL_MODE12_MONOCHROME bit in
the FSP_M_CONFIG structure.
This ensures that when a 1-bit-per-pixel framebuffer is used, the
Intel FSP is correctly informed to replicate the data across the
remaining color planes for display, saving 75% of framebuffer memory
in romstage.
Key changes:
- Define the new VGA_INIT_CONTROL_MODE12_MONOCHROME control bit.
- Conditionally set this control bit in setup_vga_mode12_params()
when CONFIG_FSP_VGA_MODE12_MONOCHROME is enabled.
BUG=b:406725440
TEST=Verify VGA text rotation on Google/Felino.
Change-Id: I1dec24bb7ed44ca07babe0aa6886a50952d3faa2
Signed-off-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90073
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>
e05492cfb4