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| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/doc/README.splashprepare | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/doc/README.splashprepare')
| -rw-r--r-- | roms/u-boot/doc/README.splashprepare | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/roms/u-boot/doc/README.splashprepare b/roms/u-boot/doc/README.splashprepare new file mode 100644 index 000000000..3cb5b5aeb --- /dev/null +++ b/roms/u-boot/doc/README.splashprepare @@ -0,0 +1,34 @@ +--------------------------------------------------------------------- +Splash Screen +--------------------------------------------------------------------- +The splash_screen_prepare() function is a weak function defined in +common/splash.c. It is called as part of the splash screen display +sequence. It gives the board an opportunity to prepare the splash +image data before it is processed and sent to the frame buffer by +U-Boot. Define your own version to use this feature. + +CONFIG_SPLASH_SOURCE + +Use the splash_source.c library. This library provides facilities to declare +board specific splash image locations, routines for loading splash image from +supported locations, and a way of controlling the selected splash location +using the "splashsource" environment variable. + +splashsource works as follows: +- If splashsource is set to a supported location name as defined by board code, + use that splash location. +- If splashsource is undefined, use the first splash location as default. +- If splashsource is set to an unsupported value, do not load a splash screen. + +A splash source location can describe either storage with raw data, a storage +formatted with a file system or a FIT image. In case of a filesystem, the splash +screen data is loaded as a file. The name of the splash screen file can be +controlled with the environment variable "splashfile". + +To enable loading the splash image from a FIT image, CONFIG_FIT must be +enabled. The FIT image has to start at the 'offset' field address in the +selected splash location. The name of splash image within the FIT shall be +specified by the environment variable "splashfile". + +In case the environment variable "splashfile" is not defined the default name +'splash.bmp' will be used. |