Implementation of PXA270 18BPP mode

[Sergey Lapin]

On Mon, Apr 26, 2010 at 10:25 PM, Adam Jackson <ajax at nwnk.net> wrote:
> On Thu, 2010-04-22 at 13:34 +0400, Sergey Lapin wrote:
>
>> Options I run X server with are /usr/X11R6/bin/X :0 -br -audit 0
>> -fbbpp 32 -depth 18 -weight
>> 666 -extension RENDER -extension Composite
>
> Depth 18 at 32 bits per pixel?  Really?
Alas, yes. According to 7.4.13.5 of PXA 270 manual,
the format is that each pixel occupy 32-bit word in little-endian format,
of which bits 0-17 are used for pixel data in RGB666 format. each
occupying 6 bits
of data.

>
> Check that the channel masks in your visuals are consistent with the
> channel masks in your picture formats.  'xdpyinfo -ext RENDER' should
> show you this.  If you don't have any depth-18 picture formats.
Thanks a lot! Will look into this.