tv-output on radeon 7000M using crtc 0

[Songmao Tian]

Songmao Tian wrote:
> Alex Deucher wrote:
>> On 10/15/07, Songmao Tian <tiansm at lemote.com> wrote:
>>  
>>> Hello,
>>>
>>>     radeon vidix driver of Mplayer seems to use crtc 0,  so I want to
>>> force tv-out to use crtc 0, I issue the following command but failed.
>>>
>>> loongson at debian:~/project/x-ati/xrandr/xrandr$ ./xrandr --output 
>>> S-video
>>> --mode 640x480 --crtc 0
>>> X Error of failed request:  BadMatch (invalid parameter attributes)
>>>   Major opcode of failed request:  155 (RANDR)
>>>   Minor opcode of failed request:  21 ()
>>>   Serial number of failed request:  17
>>>   Current serial number in output stream:  17
>>>
>>> so how to fix it? I have been tracing the xrandr, but without good 
>>> result.
>>>     
>>
>> right now the driver will only allow you to enable one output per
>> crtc, so you'll need to change whatever is using crtc 0 to use crtc1
>> or turn whatever is using crtc 0 off so that you can free up crtc 0
>> for use with the tv port.  Depending on your setup, you might also be
>> able to use output cloning (assigning multiple outputs to one crtc)
>> using the following patch:
>> http://www.botchco.com/alex/xorg/radeon_clones.diff
>>
>> Alex
>>
>>   
> Thank you! clone mode works for me. but Xv doesn't, and the performance
> is not as good as vidix.
>
> And I have try the following script to make tv out get crtc 0 which I
> confirmed with xrandr --verbose, but the X crashes and restarts.
>
>
> loongson at debian:~/project/x-ati$ cat c2
> ./a  --addmode S-video 640x480
> ./a --output VGA-0 --off
> ./a --output S-video --auto
> ./a --output S-video --mode 640x480
>
>
> Regards,
> Tian
>
>
>
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forget the X crash, I cannot reproduce it, it succeeds now.