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List:       linux-arm-kernel
Subject:    Re: [PATCH] pxafb 18bpp support
From:       Palo Revak <palo () bielyvlk ! sk>
Date:       2008-01-26 0:14:35
Message-ID: 200801260114.35533.palo () bielyvlk ! sk
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On Friday 25 January 2008 23:41:44 Russell King - ARM Linux wrote:
> On Fri, Jan 25, 2008 at 11:36:31PM +0100, Palo Revak wrote:
> > On Saturday 19 January 2008 16:46:10 Russell King - ARM Linux wrote:
> > > You determine that from the pixel format.
> > >
> > > For instance, section 1.4.12.3 lists several 18bpp formats.  These
> > > translate to the following parameters in the Linux fb_var_screeninfo
> > > structure:
> > >
> > > Figure	bits_per_pixel	r.o r.l g.o g.l b.o b.l
> > > 1-24	32		12  6   6   6   0   6
> > > 1-25	32		18  6   10  6   0   6
> > > 1-26	24		12  6   6   6   0   6
> > > 1-27	24		18  6   10  6   0   6
> > >
> > > where r.o is red.offset, r.l is red.length, g.o is green.offset, etc.
> >
> > where can I find "section 1.4.12.3" ?
>
> One of the PXA3 developer manuals - volume II iirc.

I Would to add support too for pxa3xx bud I have only pxa255 and 27x manuals. 
how can I come to pxa3 manual ?

my patch support only modes from pxa27x processors..

>
> > if I remove "var->nonstd" and keep only bits_per_pixel 24 or 32 (with
> > default RGB666 or ARGB1666), will it be enough ?
>
> That depends whether you only want one of the 24 or 32 bit formats.

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