dga support

[Francisco Javier Cabello Torres]

Hi,

Thanks for your reply. I send you the required information attached.

I have been looking for information and it seems that DGA support has been
removed from intel driver.

This is the comment in Changelog file:
==================================================
commit 5e80297d088e8cdbf66d765f7d252dab66c8df86
Author: Keith Packard <keithp at keithp.com>
Date:   Fri Sep 18 21:05:23 2009 -0700

    Remove DGA support from the driver.

    The xf86DiDGA code required that the scanout buffer always be
    mappable, stay be at a fixed address in the aperture and have a
    constant size. With frame buffer resizing, the latter two are no
    longer true, and with KMS, we'd really prefer to not allow the former.

    The only option available to the driver is to completely disable DGA
    as the modes code has internal calls to the xf86DiDGA code when
    fetching new modes from the hardware.

    A fix for the DiDGA code will be added to the X server which will
    automatically initialize DGA for mode switching and input, but not
    frame buffer access, and not require any driver cooperation.

    Thus, the correct solution is for the driver to not call xf86DiDGAInit
    at all. For old servers, this eliminates a potential catastrophic
    problem where random memory is written by the X server. New servers
    will get the DIX-based behaviour automatically.

    Signed-off-by: Keith Packard <keithp at keithp.com>
==================================================
(From
http://xorg.freedesktop.org/archive/individual/driver/xf86-video-intel-2.13.0.tar.gz
)

I guess I can try to use an older version of this driver with dga support or
try to enable DGA
in the driver again...

Is there any other possibility to get a pointer to a Video address? Any DGA
equivalent?

Thanks,

Paco


2010/10/21 <courten at web.de>

> Hi,
>
> could you post your logfile Xorg.0.log
>
> and the output of
> dmesg | grep saa
>
> as well of lspci --vv
>
> for the sake of clarity ;-)
> ---------------------
> Von: "Francisco Javier Cabello Torres" <fjcabello at visual-tools.com>
> Gesendet: 21.10.2010 18:29:45
> An: xorg at lists.freedesktop.org
> Betreff: dga support
>
> Dear All,
>
> I have a debian based linux. I have updated Xorg to 1.7.7 version and since
> that I am not able to use a saa7134 video capture device.
> There seems to be a problem with DGA support because I am able to grab
> video from the device but I can't get the framebuffer address
>  to display Overlay video. XF86DGAGetVideoLL method return a void pointer
> for Framebuffer.
>
> I have tested with Ubuntu 10.04 and there is no DGA support.
>
> I really need to display video using Overlay. Until now I have been using
> DRA to obtain frame buffer address. Given this address saa7134
>  driver is able to send the video directly to VGA screen. Is this
> capability still available using Intel glx driver and Xorg?
>
> Thanks in advance,
>
> Paco
> ___________________________________________________________
> GRATIS! Movie-FLAT mit über 300 Videos.
> Jetzt freischalten unter http://movieflat.web.de
>



-- 
Francisco Javier Cabello Torres
Investigación y Desarrollo
Research and Development
-----
V I S U A L   T O O L S
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28034 Madrid, Spain.
Telephone: + 34 91 729 48 44
Fax: +34 91 358 52 36
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