diff options
| -rw-r--r-- | payloads/external/tianocore/Kconfig | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/payloads/external/tianocore/Kconfig b/payloads/external/tianocore/Kconfig index 5349f25c09..a3c9981294 100644 --- a/payloads/external/tianocore/Kconfig +++ b/payloads/external/tianocore/Kconfig @@ -76,8 +76,18 @@ config TIANOCORE_BOOTSPLASH_FILE default "bootsplash.bmp" help The path and filename of the file to use as graphical bootsplash - screen. The file format must be uncompressed BMP, and the file's - resolution must be less than the native resolution of the display. + image. The file must be an uncompressed BMP. + + This image will also be used as the BGRT boot image, which may + persist through your OS boot process, and will be displayed + vertically centered 38.2% from the top of the display. + + See ACPI spec 6.3, 5.2.22 Boot Graphics Resource Table (BGRT), and + Microsoft's documentation on BGRT positioning: + Docs/Windows/Windows Drivers/Bring up guide/Boot screen components + + Accordingly, the image used should be no taller/wider than 40% of + the display panel's native pixel height/width (or resolution set). If an absolute path is not given, the path will assumed to be relative to the coreboot root directory. |