Re: [PATCH 2/2] omap3: devkit8000: Add and use 4.3 inch display

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On Fri, 2011-02-18 at 06:55 -0600, Daniel Morsing wrote:
> On Fri, 2011-02-18 at 13:36 +0100, Thomas Weber wrote:
> > Hello Daniel,
> > 
> > Am 12.02.2011 18:02, schrieb Daniel Morsing:
> > > This patch adds a generic panel entry for the 4.3 inch display that is
> > > sold with the devkit8000 and modifies the board file to use this
> > > display.
> > > 
> > > 
> > 
> > So only the 4.3 inch display can be used with the devkit8000?
> > There are also Devkit8000 with 5.6 and 7 inch displays.
> > 
> > Regards,
> > Thomas
> > 
> 
> Yeah, I'll admit that the patch is a bit one-sided. I couldn't find a
> way to specify a board using a class of displays with separate timing
> settings.
> 
> One way to do it would be to add the settings to modedb, but modedb is
> really only for standardized display settings. The other way to do it
> would be to add a kernel config for which display you have connected to
> the board, but I think that is a bad idea, because it makes everything
> more complicated and switching out displays would require recompiling
> the kernel.
> 
> Maybe Tomi or the fbdev guys have some input on how to best do this?

There's no proper way for this currently. And I'm not even sure what
would be a good way to do this.

Optimally the board code could read some configuration value from eeprom
or where-ever, which would tell the configuration of the board. And the
board file could then configure the correct display.

Another way would be to add a devkit8000 specific kernel parameter,
given from bootloader, which would tell the configuration. The board
file would use this parameter to configure the correct display.

 Tomi


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