Re: siliconmotion CSync output ?

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.
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