This patch selects LZ4 decompression for logo CBFS file. Able to save
2ms of the boot time when HAVE_FSP_LOGO_SUPPORT config is enabled.
However, the compressed BMP logo size is increased by ~2KB.
Raw BMP Image size is ~97KB.
BUG=b:284799726
TEST=Able to see pre-boot splash screen while booting google/rex
with 32MB (W25Q256JWEIM) SPI-Flash.
w/o this patch:
sudo cbfstool image-screebo4es.bin print -r FW_MAIN_A
FMAP REGION: FW_MAIN_A
Name Offset Type Size Comp
...
...
logo.bmp 0x167480 raw 6172 LZMA (97078 decompressed)
...
15:starting LZMA decompress (ignore for x86) 849,090 (1,022)
16:finished LZMA decompress (ignore for x86) 851,207 (2,116)
w/ this patch:
sudo cbfstool image-screebo4es.bin print -r FW_MAIN_A
FMAP REGION: FW_MAIN_A
Name Offset Type Size Comp
...
...
logo.bmp 0x167480 raw 8568 LZ4 (97078 decompressed)
...
17:starting LZ4 decompress (ignore for x86) 849,419 (1,279)
18:finished LZ4 decompress (ignore for x86) 849,559 (140)
Change-Id: I856c39146a5ec0faf44c1cd37fa7c0d7296bf673
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76930
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
36d612c0aa