[Intel-gfx] Sandy Bridge Desktop - 1920x1080i interlace not working

[Angela Schmid]

Hello Daniel

>Your TV likely sends a CEA block with some HDMI default modes set. Since
>linux-3.3-rc1 (to be released in a few days) we should be able to decode that. 
>Can you grab the latest -linus kernel git and try that?

I wanted to remind, that the interlaced modes work with the noveau driver with the 3.0.0 Kernel. Do they ignore the kernel routines
and have their own code ? 

[   18.242858] [drm:drm_mode_debug_printmodeline], Modeline 28:"1920x1080i" 0 74250 1920 2008 2052 2200 1080 1084 1094 1125 0x40
0x15
[   18.242861] [drm:drm_mode_prune_invalid], Not using 1920x1080i mode 7
[   18.242863] [drm:drm_mode_debug_printmodeline], Modeline 27:"1920x1080i" 0 74250 1920 2448 2492 2640 1080 1084 1094 1125 0x48
0x15
[   18.242865] [drm:drm_mode_prune_invalid], Not using 1920x1080i mode 7

At this point, does the drm driver call kernel routines and decide on your mentioned kernel routines return to ignore those modes ?

Angela

> -----Original Message-----
> From: Daniel Vetter [mailto:daniel.vetter at ffwll.ch] On Behalf Of Daniel Vetter
> Sent: 18 January 2012 00:13
> To: Angela Schmid
> Cc: 'Alfonso Fiore'; 'Daniel Vetter'; intel-gfx at lists.freedesktop.org; 'Rodrigo Vivi'
> Subject: Re: [Intel-gfx] Sandy Bridge Desktop - 1920x1080i interlace not working
> 
> On Tue, Jan 17, 2012 at 11:53:47PM +0100, Angela Schmid wrote:
> > Over HDMI works:
> >
> > "1280x720 at 50hz"   74.25  1280 1720 1760 1980  720 725 730 750 +hsync +vsync
> >
> > 1280x720 at 50hz (0xb4)   74.2MHz +HSync +VSync *current
> >
> >         h: width  1280 start 1720 end 1760 total 1980 skew    0 clock   37.5KHz
> >
> >         v: height  720 start  725 end  730 total  750           clock   50.0Hz
> >
> >
> >
> >
> >
> > "1440x576i"x0.0   27.00  1440 1464 1590 1728  576 580 586 625 interlace -hsync -vsync
> >
> > 1440x576ix0.0 (0xbd)   27.0MHz -HSync -VSync Interlace *current
> >
> >         h: width  1440 start 1464 end 1590 total 1728 skew    0 clock   15.6KHz
> >
> >         v: height  576 start  580 end  586 total  625           clock   25.0Hz
> >
> > and
> >
> > "1440x288"x0.0 27.00 1440 1464 1590 1728 288 290 293 312 -hsync -vsync
> >
> >
> >
> > Have a lot of horizontal overscan, vertical very small, useless.
> 
> Yeah, many TVs send out a different edid depending upon what connector
> they are plugged in. Also we currently don't handle overscan compensation
> at all, Rodrigo is working on that.
> 
> > It is some time ago, that I compiled kernels myself. I compile drivers regularly. I will have a look next
> week.
> >
> >
> >
> > >Your TV likely sends a CEA block with some HDMI default modes set. Since
> >
> > >linux-3.3-rc1 (to be released in a few days) we should be able to decode that.
> >
> > >Can you grab the latest -linus kernel git and try that?
> >
> >
> >
> > Too many ways described on one page: http://wiki.ubuntuusers.de/Kernel/Kompilierung
> >
> > Kernel.org links to kernel newbies website. Do you have a link how to compile/install ?
> 
> Maybe ask on irc about what's suggested. Way back I've used "Die
> klassische Debian-Methode".
> 
> > >You need to compile a new kernel, the output handling part of the graphics driver is there. Best is to try
> the latest
> > drm-intel-fixes tree available
> >
> > >at: https://git.kernel.org/?p=linux/kernel/git/keithp/linux.git;a=shortlog;h=refs/heads/drm-intel-fixes
> >
> > Can I wait for the ppa:xorg-edgers ?
> 
> If they track drm-intel-fixes, yeah. But you might want to try to compile
> the kernel, too, in case we have some additional patches for you to apply.
> 
> Yours, Daniel
> --
> Daniel Vetter
> Mail: daniel at ffwll.ch
> Mobile: +41 (0)79 365 57 48