diff options
| author | Felix Friedlander <felix@ffetc.net> | 2021-01-08 16:37:40 +1100 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2021-10-09 20:56:21 +0000 |
| commit | 45ce84113eee59ca0be53436105a05633b78315f (patch) | |
| tree | f9047514bfe5e1725d7c24f402a6690924d4964a /payloads/external | |
| parent | ca1851dc1c57407e25f75e7562a688a5cdcd8e49 (diff) | |
payloads/tianocore/Kconfig: Extend help for bootsplash file
Add more detail as to why a smaller-than-screen-size image is to be
preferred, in contrast to other payloads' bootsplash images.
Signed-off-by: Felix Friedlander <felix@ffetc.net>
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Change-Id: Ib4c6666bb0e49369fe8fe2ae3dc12c023f668da0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49233
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'payloads/external')
| -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. |