Ben,
The DM6467 VPIF lacks the OSD peripheral present in the VPSS of other
Davinci devices; in particular it has no color space conversion hardware. This
being said there is no way to effectively display RGB frame buffers,
theoretically you could write a RGB->YCbCr conversion routine and frame buffer
driver in software but this would have significant overhead, in any case only
video (YCbCr) through V4L2 is supported for DM6467 as things are today (I know
of no plans for FB on DM6467).
Regards,
Bernie Thompson
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
Steve Chen
Sent: Monday, January 12, 2009 10:35 AM
To: Benjamin C. Nowak
Cc: [email protected]
Subject: RE: X11 on dm6467
On Mon, 2009-01-12 at 11:00 -0500, Benjamin C. Nowak wrote:
> Steve and Brijesh
>
> Thank you, that is what I had feared. That will make things more complicated.
> Was support for the frame buffer dropped for bandwidth reasons?
I only know that there is no frame buffer support in hardware, I don't
know why.
>
> What is the default way to use the component out as a display on the DM6467?
There should be some sample applications that comes with SDK that uses
component video. Someone from TI can probably give you far better
details than I can.
>
> Thank you,
>
> Ben
>
> > Correct, there is no frame buffer device on DM6467, so can not run X11.
> >
> > Steve
> >
> > On Mon, 2009-01-12 at 09:49 +0530, Jadav, Brijesh R wrote:
> >> Hi,
> >>
> >> That's correct. Dm6467 does not support frame buffer driver. It
> >> supports only V4L2 drivers. I have not seen X11 running on V4L2. I am
> >> not sure but it might not be possible.
> >>
> >> Thanks, Brijesh Jadav -----Original Message----- From:
> >> [email protected]
> >> [mailto:[email protected]] On
> >> Behalf Of Benjamin C. Nowak Sent: Sunday, January 11, 2009 10:32 PM To:
> >> Benjamin C. Nowak Cc: [email protected]
> >> Subject: Re: X11 on dm6467
> >>
> >> This is the message that startx produces:
> >>
> >> X- server X Window System Version 6.8.2 Release Date: 9 February 2005 X
> >> Protocol Version 11, Revision 0, Release 6.8.2 Build Operating System:
> >> MontaVista Linux [ELF] MontaVista Software, Inc. Current Operating
> >> System: Linux 192.168.1.101 2.6.10_mvl401-davinci_evm #1 Wed Oct 22
> >> 19:05:32 IST 2008 armv5tejl
> >>
> >> Build Date: 05 July 2006 Before reporting problems, check
> >> http://wiki.X.Org
> >>
> >> to make sure that you have the latest version.
> >>
> >> Markers: (--) probed, (**) from config file, (==) default setting, (++)
> >> from command line, (!!) notice, (II) informational, (WW) warning, (EE)
> >> error, (NI) not implemented, (??) unknown.
> >>
> >> (==) Log file: "/var/log/Xorg.0.log", Time: Thu Jan 11 12:00:45 2009
> >>
> >> (==) Using config file: "/etc/X11/xorg.conf"
> >>
> >> (EE) open /dev/fb/0: No such file or directory
> >>
> >> (EE) No devices detected
> >>
> >> Fatal server error:
> >>
> >> no screens found
> >>
> >> The device node /dev/fb does not exist.
> >>
> >> - Ben
> >>
> >>
> >>> Hi all,
> >>>
> >>> I am working with a dm6467 and went through the walk through
> >>> http://wiki.davincidsp.com/index.php?title=USB_Webcam to get a
> >>> Logitec quickcam recognized by the system.
> >>>
> >>> I would like to use SDL to capture images from the camera and then
> >>> use X11 to display them to the component output (after some
> >>> processing).
> >>>
> >>> The startx command fails because the frame buffer devices are not in
> >>> the system. My understanding is that the dm6467 does not support fbdev
> >>> because it is based on V42L.
> >>>
> >>> If this is the case, is it possible to start an X-session on the
> >>> dm6467?
> >>>
> >>> Thank you,
> >>>
> >>> Ben Nowak
> >>>
> >>>
> >>> _______________________________________________
> >>> Davinci-linux-open-source mailing list
> >>> [email protected]
> >>> http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-sourc
> >>> e
> >>>
> >>>
> >>
> >>
> >> _______________________________________________
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> >
> >
> >
>
>
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