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---------------------------------------------------------------------
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Splash Screen
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---------------------------------------------------------------------
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The splash_screen_prepare() function is a weak function defined in
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common/splash.c. It is called as part of the splash screen display
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sequence. It gives the board an opportunity to prepare the splash
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image data before it is processed and sent to the frame buffer by
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U-Boot. Define your own version to use this feature.
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CONFIG_SPLASH_SOURCE
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Use the splash_source.c library. This library provides facilities to declare
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board specific splash image locations, routines for loading splash image from
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supported locations, and a way of controlling the selected splash location
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using the "splashsource" environment variable.
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splashsource works as follows:
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- If splashsource is set to a supported location name as defined by board code,
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use that splash location.
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- If splashsource is undefined, use the first splash location as default.
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- If splashsource is set to an unsupported value, do not load a splash screen.
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A splash source location can describe either storage with raw data, a storage
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formatted with a file system or a FIT image. In case of a filesystem, the splash
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screen data is loaded as a file. The name of the splash screen file can be
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controlled with the environment variable "splashfile".
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To enable loading the splash image from a FIT image, CONFIG_FIT must be
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enabled. Struct splash_location field 'name' should match the splash image
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name within the FIT and the FIT should start at the 'offset' field address in
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the specified storage.
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