[U-Boot] [PATCH] Add splash screen support via loading from flash

[Wolfgang Denk]

Dear Robert,

In message <CAMDMJ5PJ_AqZaxTRdnvS8ju_SkVHV7zoDrBUyhgjt2jfr4Ok4Q at mail.gmail.com> you wrote:
>
> > >  board/boundary/nitrogen6x/nitrogen6x.c | 22 ++++++++++++++++++++++
> > >  include/configs/nitrogen6x.h           | 11 ++++++++++-
> > >  2 files changed, 32 insertions(+), 1 deletion(-)
> >
> > Could you please explain why you need custom code here?
> 
> I originally tried to use the CONFIG_SPLASH_SCREEN_PREPARE functionality.
> After some frustration, I figured out that without CONFIG_LCD, it is never
> actually called.
> http://git.denx.de/?p=u-boot/u-boot-imx.git;a=blob;f=common/stdio.c;h=5d5117c0ed838195a2caad7c28c128247771cd92;hb=HEAD#l216
> 
> It does seem odd that there are 2 totally different paths and the other
> splash screen related macros are used in both but the prepare function is
> only called in the LCD case.

OK, so this is a bug that needs to be fixed - but for all boards.

> Since we use CONFIG_VIDEO and not CONFIG_LCD, this seemed to be the best,
> or at least the least invasive, solution.

No, this is definitely not the "best" solution, as it keeps the bug,
so the next one who tries to do what you are doing will run into it
again.

Pleast let's fix the problem at the cause.

Please fix the video code to also run splash_screen_prepare() at the
appropriate place.  While you are at it, please also replace this
construct

	1071 #ifdef CONFIG_SPLASH_SCREEN_PREPARE
	1072 static inline int splash_screen_prepare(void)
	1073 {
	1074         return board_splash_screen_prepare();
	1075 }
	1076 #else
	1077 static inline int splash_screen_prepare(void)
	1078 {
	1079         return 0;
	1080 }
	1081 #endif

(in "common/lcd.c") and use a "weak" function for
splash_screen_prepare().  board_splash_screen_prepare() is no longer
needed, then (the boards can provide their own implementation of
splash_screen_prepare()).

Thanks.

Best regards,

Wolfgang Denk

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