how to configure LCD as console for RPX-LITE

how to configure LCD as console for RPX-LITE

[Alan Wang]

Hi, all
  I am compiling mpc8xx-2.2.13 for my RPX-LITE(mpc823) board. Now, I want to use the LCD
as my console but when I enable the frame buffer and virtual terminal by "make configure", I got
so many "reference undefined" errors when linking. is there anybody succeeded in this?
how do u configure your kernel? thank you.

Alan

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Re: how to configure LCD as console for RPX-LITE

[Matthew Locke]

I don't remember 2.2.13 having a framebuffer driver for the lcd.
download the 2.2.14 kernel from ftp.mvista.com

we have pre-configured/built kernel rpms for the rpx-lite called lsp's
(linux support package).  those are a good starting point for
configuring for a frame buffer.  As for the console part, I have never
tried but it should work.

Alan Wang wrote:
>
> Hi, all
>   I am compiling mpc8xx-2.2.13 for my RPX-LITE(mpc823) board. Now, I want to use the LCD
> as my console but when I enable the frame buffer and virtual terminal by "make configure", I got
> so many "reference undefined" errors when linking. is there anybody succeeded in this?
> how do u configure your kernel? thank you.
>
> Alan
>

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RE: how to configure LCD as console for RPX-LITE

[Alan Wang]

ok, I am working on hhl's 2.2.14. I enabled:
   Support for frame buffer devices (EXPERIMENTAL)
   RPX-Lite 823(e) LCD Frame Buffer
when I configured the kernel.

I am sure the lcd is configured correctly because I clear the screen by setting
the memory mapped to lcd's framebuffer to all zero after lcd823_init_dev(). but
nothing happened when the kernel boot, nothing displayed on the lcd.
I found lcd823_init() calls register_framebuffer() to do the registration, and
the console should be switched to frame buffer after register_framebuffer
call take_over_console(). but why there is no char displayed? any suggestion?
btw: do I have to enable "Advanced low level driver options"? the help file says
the low level drivers are automatically enabled.

thx
Alan

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