[U-Boot] IMX51 EVK Splash Screen

[Stefano Babic]

On 01/20/2011 03:06 AM, Thomas Besemer wrote:
> Hi folks -
> 
> I had posted last week.  I was able to get basic Splash Screen going on EVK,
> through using patches I found from googling around.  At the end of this email,
> the patch set that shows the differences from the U-Boot I pulled on
> 12/24/2010.  I am not sure I have the right patch set, but in this case,
> what I have does seem to work; U-Boot does output to LCD display on the
> second Display Interface.

There is no correct patchset. As I already stated, patches sent
sometimes ago to ML (and that you reuse) require some rework to be
merged into the mainline.

> There seems to have been a discussion on lcd_setmem().  Has this been
> resolved, and I missed it?

No, someone should fix it. The result of the discussion suggested by
Wolfgang is to use the same interface Linux uses, that is with a
video-mode=" variable with something such as 1024x768 at 60. U-Boot has
already a videomodes.c, but it uses an ancient syntax for videomode (see
the code). Feel free to fix it.

>  You'll see from patch set that I just put a
> very large buffer in place (hard coded hack).

Of course it can work, but this cannot go to mainline...

>  U-Boot hung on boot before
> I put this in, and based on what I see on mailing list, this seems to be
> an issue of not having the display information available early on in boot.

Right. This is an open issue.

> At any rate, I got it to boot, and see that the LCD shows display on
> startup.  Yet, I lose the console on this; the serial port is read, but
> the output goes to LCD.

Fine.

> In an ideal world, what I would like is to not loose the console.

Console remains on UART if you do not change the behavior.

>  I want
> stdin/stdout to remain on serial port, while I toss a bit map out on LCD.
> Any comments on how to do this?  End game is that I toss a splash screen
> up on LCD on EVK, while having U-Boot information still on the console.

This is already foreseen. If you checked in IPU code, there is an
overwrite function set for this purpose. You must set
CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE. Check the setup in the vision2 board.

> 
> So, a couple of things:
> 
> 1. Do I have correct patch work for this version of U-Boot, or is there a
> newer version of U-Boot to pull?  I pulled both mainline and IMX tree
> yesterday, don't see the MX51 EVK in them.

As I stated previously, the patch adding splashscreen to the mx51evk
board need reworking.

> 2. How to configure so that I get console while LCD is available for display.

See my answer before

> 
> 3. What is current status on lcd_setmem() thing.

Awaiting for patches. Do you think you can provide them ?

> I might have missed a few things along the way folks; I am not the sharpest
> tool in the shed.  Please let me know if I missed patch sets on lcd_setmem(),
> and help me understand how to make sure console works with Splash Screen.

Regarding lcd_setmem() there is some clear statements. IMHO I like
Wolfgang's proposal, because we should not reinvent the wheel.

Best regards,
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================