Re: siliconmotion CSync output ?

On 3/9/07, bruno schwander <[email protected]> wrote:
> I keep answering my own questions. I hopI am not spamming the mailing list
> too much, but it's nice to get some degree of confirmation from those who
> know before I dive into something.
>
> so I gather now that actually I should leave the xf86SetCrtcForModes()
> alone, and just add setting the clock with CCR6C, CCR6D (and enabling it
> with CCR68). I'll see how that goes...
>

exactly.  Sorry for not responding earlier.  You can use the
SMI_CalcClock() function to calculate SR6C and SR6D, just like the
mclk is generated. Use mode->Clock.  I have a similar patch in my xorg
smi tree.

Alex

>
> bruno
>
> On Thu, 8 Mar 2007, bruno schwander wrote:
>
> > On Thu, 8 Mar 2007, Alex Deucher wrote:
> >
> >> The siliconmotion driver doesn't explicitly set the vclk pll.  It uses
> >> the bios (if UseBIOS is set or does nothing if not).
> >
> >
> > that is what I was wondering...
> > well, if I do not
> >
> > Options UseBIOS  false
> >
> > all I get is a blank screen. So I have to disable it. I did not realize that
> > it did not set the pixel clock since when using a default VGA 640x480
> > resolution, it was working. So I guess it just happens to stay at whatever
> > pixel clock the BIOS or console driver had set it to ? That seems very
> > strange.
> >
> >> It's trivial to add however. SR6C, SR6D are programmed similarly to the
> >> mclk.
> >
> > I saw that mclk/dac stuff, yes, and was wondering how the pixel clock was
> > really set. All this makes more sense now.
> >
> > So what you are saying is that in smi_driver.c : SMI_PreInit(), I should
> > replace the call to xf86SetCrtcForModes(pScrn, 0), with an alternative that
> > programs vclk explicitely ?
> >
> > How can it set the crtc for several modes ? That is what
> > xf86SetCrtcForModes() seems to do, right ?
> >
> > I still have a lot to learn.
> >
> > thanks for all the help guys, trudging along...
> >
> > bruno
> >
> >
> >
> >> Alex
> >>
> >>> Bruno
> >>>
> >>> On Wed, 7 Mar 2007, bruno schwander wrote:
> >>>
> >>> > ah actually now it is not choosing my modeline and I do not understand
> >>> why:
> >>> >
> >>> > (II) Silicon Motionlg: Using hsync range of 14.00-80.00 kHz
> >>> > (II) Silicon Motionlg: Using vrefresh range of 56.00-76.00 Hz
> >>> > (II) Silicon MotionClock range:  14.00 to 135.00 MHz
> >>> > (II) Silicon MotionMode: 640x480 16-bpp, 59.990181Hz
> >>> > (II) Silicon MotionNot using mode "640x480i" (vrefresh out of range)
> >>> > (II) Silicon MotionMode: 640x350 16-bpp, 85.079948Hz
> >>> > (II) Silicon MotionNot using default mode "640x350" (vrefresh out of
> >>> range)
> >>> >
> >>> >
> >>> > vrefresh range is 56-76Hz, so why is my 640x480i modeline, at 59.99Hz
> >>> > vrefresh, rejected ?
> >>> >
> >>> > the modeline is as follows:
> >>> >
> >>> >  ModeLine "640x480i" 24.44 640 680 728 776 480 480 484 525 Interlace
> >>> > Composite
> >>> >
> >>> >
> >>> >
> >>> > bruno
> >>> >
> >>> >
> >>> > On Wed, 7 Mar 2007, bruno schwander wrote:
> >>> >
> >>> >> I think I figured it out, however it seems that although my modeline
> >>> >> includes 'composite'
> >>> >>
> >>> >> DisplayModePtr mode->Flags & V_CSYNC
> >>> >>
> >>> >> does not evaluate to true. I assume as long as the 'composite' keyword
> >>> is
> >>> >> found on the modeline, the flag should be set, right ?
> >>> >>
> >>> >> I need to add some debug messages, but this seems a little strange. Is
> >>> >> there something else that needs to be configured, like telling that the
> >>> >> driver actually supports the composite keyword on the modeline ?
> >>> >>
> >>> >> On a different note, the latest X release does not seem to work on that
> >>> >> chip. I just get a blank screen. So I started hacking on Xorg 6.8.2 to
> >>> test
> >>> >> this stuff. I figure XFree86 4.5 should work, but 4.6 does not.
> >>> >>
> >>> >> I'll provide patches to all and note on which version it was tested of
> >>> >> course, once it works :-)
> >>> >>
> >>> >> bruno
> >>> >>
> >>> >> On Tue, 27 Feb 2007, Marc Aurele La France wrote:
> >>> >>
> >>> >>> On Sun, 25 Feb 2007, bruno schwander wrote:
> >>> >>>> On Fri, 23 Feb 2007, Marc Aurele La France wrote:
> >>> >>>>> On Thu, 22 Feb 2007, bruno schwander wrote:
> >>> >>>>>> A little background: I have a single board PC with a SMI712
> >>> (lynxEM+)
> >>> >>>>>> graphic chipset. X works like a charm.
> >>> >>>
> >>> >>>>> The driver currently ignores the V_CSYNC mode flag, so you would
> >>> need to
> >>> >>>>> come up with a source patch to change that.
> >>> >>>
> >>> >>>> I'd be happy to provide a patch, if I can figure where to put that.
> >>> Since
> >>> >>>> it is only a matter of setting one register it should be simple
> >>> enough. I
> >>> >>>> have (had?) no idea where to start, I'll grep for V_CSYNC and see...
> >>> >>>
> >>> >>> An appropriate spot for such changes would be after calls to
> >>> vgaHWInit(),
> >>> >>> which, in this case, is in SMI_ModeInit().
> >>> >>>
> >>> >>> Marc.
> >>> >>>
> >>> >>>
> >>> +----------------------------------+----------------------------------+
> >>> >>> |  Marc Aurele La France           |  work:   1-780-492-9310
> >>> |
> >>> >>> |  Academic Information and        |  fax:    1-780-492-1729
> >>> |
> >>> >>> |    Communications Technologies   |  email:  [email protected]
> >>> |
> >>> >>> |  352 General Services Building
> >>> +----------------------------------+
> >>> >>> |  University of Alberta           |
> >>> |
> >>> >>> |  Edmonton, Alberta               |    Standard disclaimers apply
> >>> |
> >>> >>> |  T6G 2H1                         |
> >>> |
> >>> >>> |  CANADA                          |
> >>> |
> >>> >>>
> >>> +----------------------------------+----------------------------------+
> >>> >>> XFree86 developer and VP.  ATI driver and X server internals.
> >> _______________________________________________
> >> Devel mailing list
> >> [email protected]
> >> http://XFree86.Org/mailman/listinfo/devel
> >>
> >>
> > _______________________________________________
> > Devel mailing list
> > [email protected]
> > http://XFree86.Org/mailman/listinfo/devel
> >
> >
> _______________________________________________
> Devel mailing list
> [email protected]
> http://XFree86.Org/mailman/listinfo/devel
>