Re: G550 bug ? (was Re: Independ multiple users on G550)

[Svetoslav S. <sv...@gm...>]

> On  1 Dec 03 at 17:57, Svetoslav Slavtchev wrote:
> > > it is impossible for yres_virtual to ever become 65536... Besides that
> > > for 1024x65536/16bpp you need 128MB of videoram, and G550 can have
> only
> > > 32MB. So you screwed something a lot. You should get
> > > 
> > > matroxfb: Matrox G550 detected
> > > matroxfb: MTRR's turned on
> > > matroxfb: 1024x768x16bpp (virtual: 1024x8190)
> > > matroxfb: framebuffer at 0xDA000000, mapped to 0xe0810000, size
> 33554432
> > > Console: switching to colour frame buffer device 128x48
> > > fb0: MATROX frame buffer device
> > 
> > two questions 
> > 1.)
> >  is there a way to specify yres_virtual,
> >  i can not see such module option
> 
> You cannot specify it - you can only say 'yes, I want virtual scrolling'
> or 'no, I do not want it'. If you use 'video=matroxfb:nopan', driver will
> use yres_virtual == yres. If you do not specify it, driver attempts
> to use largest possible value smaller than 65536. Apparently for some
> reason fb_set_var() with yres_virtual == 65536 succeeds without
> changing passed var, although it should report back truncated
> yres_virtual....
> oh, stop! There is no fb_set_var call in stock matroxfb. Can you try
> opening
> drivers/video/matrox/matroxfb_base.c in your favorite text editor and
> locakte
> 
>   matroxfb_init_fix(PMINFO2);
>   err = -EINVAL;
> 
> and add
> 
>   fb_set_var(&ACCESS_FBINFO(fbcon), &vesafb_defined);
>   
> between these two lines there... It should then use proper (~8190) vyres 
> instead of 64K. But probably vgacon -> matroxfb will stop working after 
> that, and you'll see whole screen as bright white instead of text 
> inherited from vgacon.

everything lloks OK in dmesg, but running swapped still breaks
both without/with nopan=1

-----withount nopan
matroxfb: Matrox G550 detected
matroxfb: MTRR's turned on
matroxfb: 1024x768x32bpp (virtual: 1024x4096)
matroxfb: framebuffer at 0xD8000000, mapped to 0xe0ca9000, size 16777216
fb0: MATROX frame buffer device
fb0: initializing hardware
matroxfb_crtc2: secondary head of fb0 was registered as fb1
-----with nopan=1
matroxfb: Matrox G550 detected
matroxfb: MTRR's turned on
matroxfb: 1024x768x32bpp (virtual: 1024x768)
matroxfb: framebuffer at 0xD8000000, mapped to 0xe0ca9000, size 16777216
fb0: MATROX frame buffer device
fb0: initializing hardware
matroxfb_crtc2: secondary head of fb0 was registered as fb1
[root@tux root]# fbset -fb /dev/fb0

mode "1024x768-60"
    # D: 64.994 MHz, H: 48.359 kHz, V: 59.998 Hz
    geometry 1024 768 1024 768 32
    timings 15386 160 32 30 4 128 4
    accel true
    rgba 8/16,8/8,8/0,8/24
endmode
[root@tux root]# matroxfb_swapped
[root@tux root]# fbset -fb /dev/fb0

mode "1024x0-1273"
    # D: 64.994 MHz, H: 48.359 kHz, V: 1272.598 Hz
    geometry 1024 0 1024 0 32
    timings 15386 160 32 30 4 128 4
    accel true
    rgba 8/16,8/8,8/0,8/24
endmode

> > 2.) 
> >  how should one adjust the mode for head2,
> >  matroxfb_crtc2 has only a "mem" option
> 
> fbset. crtc2 always begins in 640x480/32bpp, as it cannot be your 
> boot monitor, so you can always run fbset. Unless you have 2.6.x
> fbset-less
> kernel, in which case you have just bad luck...

fbdev bk tree should support fbset, but let see when it will be merged in
2.6
/* or in ruby */

> > > I'd say that if you want support from me, you should use my code...
> > > I have no idea what you are doing in your tree, but you are apparently
> > > doing wrong things...
> > 
> > just asking :(
> > i'm not a kernel programmer, and i'm not familiar with the fb /console
> > internals
> > if i was i would try to merge your driver, but i'm not so ...
> > 
> > and as said your driver makes deep changes to the FB API, which IMHO are
> > incompatible
> > with ruby
> 
> Version in kernel just uses standard fbdev API present in 2.6.x kernel.

i ment the driver you actively work on, the one on your ftp/http page


best,

svetljo

-- 
Neu bei GMX: Preissenkung für MMS-Versand und FreeMMS!

Ideal für alle, die gerne MMS verschicken:
25 FreeMMS/Monat mit GMX TopMail.
http://www.gmx.net/de/cgi/produktemail

+++ GMX - die erste Adresse für Mail, Message, More! +++