Re: printk on framebuffer console

["Antonino A. Daplas" <adaplas@gmail.com>]

Terence Soh wrote:
>> You're better off sending this to linux-fbdev-devel, so I'm adding
>> this to the CC list.
> Thanks for the tip!
> 
>>
>> Yes, the monochrome bitmap are expanded to the current foreground and
>> background colors of the console.
> Would I be better off using vgacon?

Well, depends on what you want.  If you just want pure text, then
vgacon should suit your needs just fine.

> 
>>
>> First, make sure that writing directly to the framebuffer memory displays
>> something properly on your monitor.
>>
> Yes, I've got the fbcon_logo working and the fb0 working with
> QT-embedded. The problem is that printk doesn't work in fb console only
> in serial console.

If you can display the logo, then you're very nearly done.

> 
>> Then make sure that your driver has a working xxxfb_setcolreg function()
>> and that info->pseudo_palette is properly filled up.
>>
> Are xxxfb_setcolreg function() and info->pseudo_palette necessary for
> FB_VISUAL_TRUECOLOR? I thought it's required for FB_VISUAL_PSEUDOCOLOR.
> 

Other way around, the info->pseudo_palette is needed for truecolor and
directcolor.  So fill this array properly, and you should be good to go.
Look at any driver (ie vesafb.c) on how it's done.

Tony 


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