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@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:
- 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.
- How to configure so that I get console while LCD is available for display.
See my answer before
- 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