[MPlayer-dev-eng] fbdev:vidix / vidix bug

[Nick Kurshev]

Hello, Arpi!

On Fri, 18 Jan 2002 10:01:41 +0200 (CEST) you wrote:

> Hi,
> 
> > Anyway - genfb is bad driver for VIDIX.
> > Even if linux-2.6 will have such extension for example from RUBY
> > tree of linuxconsole.sf.net (FBVID.H) or from V4L2 project then
> > it will not cause to implement such driver for VIDIX.
> > 
> > Please, REMEMBER:
> >  NEVER GENERIC DRIVERS FOR VIDIX ONLY NATIVE ONES (VENDOR_ID DEPENDED).
> 
> Alex, I agree with Nick in this. Vidix is a direct hardware access layer.
> If fbdev provides any hw accel, write a new vo_fbdevhwaccel or modify old
> vo_fbdev. it does not require direct hw access, it is handled by kernel and
> you can use ioctls to /dev/fb0.
> 
> btw, about vidix: i miss some important features:
> - IRQ handling
As I've found - irq isrequired by mga_vid only to implement something like SMART SWITCH
in double buffering. But X11'a mga_video doesn't use such feature.
> - working as non-root
It's payment for portability. (It's same as for XServer).
> i think we should write (at least for linux, and maybe optional) a generic
> kernel driver to do the mapping to userspace, and to handle irqs.
> 
It's no way.
> 
> A'rpi / Astral & ESP-team
> 
> --
> mailto:arpi at thot.banki.hu
> http://esp-team.scene.hu
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> 


Best regards! Nick