Thread: 800x480 SUCCESS in Linux with VIA onboard video!

Hey Ivor, thanks for the detailed reply!
I wasn't suggesting that the big bad patch is a scary one... sorry if it came off that way.

I've already done the DotClock change suggested above for the basic source deb files for xorg which come with ubuntu "hoary" 5.04, and it seems to be working well...

I was/am mostly wanting to compare both drivers in terms of performance to see which one does a better job...
I'm mostly interested in plain 2D performance for media frontend + visualizations.
If I find anything exciting I'll let you know.

IF BSP_DISPLAY_VIA

; @CESYSGEN IF CE_MODULES_PCI

; Added by Yapi,2002-06-25 , For SetMode by Registry Function

[HKEY_LOCAL_MACHINE\System\GDI\Drivers]
"Display"="ddi_via.dll"
;
; VIA driver settings
;
[HKEY_LOCAL_MACHINE\Drivers\Display\VIA]
;; Support DisplayDevice
;1 : CRT
;2 : LCD
;4 : TV
;8 : DVI
;10: HDTV
;; If set CRT + LCD, DisplayDevice = 3
;; If set CRT + TV , DisplayDevice = 5
;; If set CRT + DVI, DisplayDevice = 9
;; If set CRT + HDTV, DisplayDevice = 11
"DisplayDevice"=dword:1

;; Panel Size Index Setting for LCD, include PanelSize, Dual/Single, Dithering
;0: 640x480, single, dithering
;1: 800x600, single, dithering
;2: 1024x768, single, dithering
;3: 1280x768, single, dithering
;4: 1280x1024, dual, dithering
;5: 1400x1050, dual, dithering
;6: 1600x1200, dual, dithering
;7: 1280x800, single, dithering
;8: 800x480, single, dithering
;9: 1024x768, dual, dithering
;A: 1024x768, single, nodithering
;B: 1024x768, dual, nodithering
;C: 1280x768, single, nodithering
;D: 1280x1024, dual, nodithering
;E: 1400x1050, dual, nodithering
;F: 1600x1200, dual, nodithering
;; When CRT + LCD , must set Panel Type here.
;; If Panel Type setting is not the actual correct size , it will not set LCD on.
"LCDPanelSizeIndex"=dword:2

;; Panel Centering or Expanding setting
;0: Center
;1: Expand
"PanelCenter"=dword:0

;; Mobile or DeskTop
;0: DeskTop
;1: Mobile
"IsMobile"=dword:1

;; For Atrium Customer. Support LVDS 12DDR
;0: None
;1: Yes
"Atrium"=dword:0


If wince5.0 has support, why not xp?

via should work on providing the support for 800x480 support in xp drivers.

As people HAVE mentioned before, the Windows XP driver does support 800x480 only with no acceleration of graphics.
I suspect the same it tru for windows ce.

I got this working, and can verify the 800x480 outout with a normal monitor, but my lilliput doesn't show anything with this modeline. So I guess the mode only works for xenarc screens? Does anyone have a working modeline for lilliput?

Originally Posted by damageboy

As people HAVE mentioned before, the Windows XP driver does support 800x480 only with no acceleration of graphics.
I suspect the same it tru for windows ce.

it is NOW

This almost works, but i'm not quite there yet. I'm not sure what the story is here, I don't know if there are different xenarc panels, but when I performed this change, it switched to 800x480, but the screen was all wavy and messed up.. It's about as close as I've come so far though.

Are there any other timings that might work? Is there an easier way to find what my correct timings should be? Something like Powerstrip for linux?

To be clear the instructions worked fine, everything compiled great, and as soon as I put the new via_drv.o in, it was obviously better than the stock driver..

I gotta ask, what kernel are (those of you with it working) using? I'm using 2.6.12-rc4-mm1, the newest i've found that has the via DRM module. I've been using epiawiki.org for much of my trials, is that where you guys started too?

FYI, i'm using gentoo on an MII10000, and a xenarc 700tsv, all of it only a couple days old..

Thanks for any help!

-p

Hmm. You may need a different dotclock register address. There's a utility that spits out various register addresses for a particular dotclock setting...uh...I'll have to go back and look up what the app name is, and how it works.

Thanks for the response,

I ended up tinkering with xvidtune to get a working 800x480 modeline. Strangely enough I got it working with a pixel clock rate that already existed it via_mode.h (40.00 instead of 31.746 or whatever). Here's my modeline if anyone else comes across this problem.

Code:

 Modeline "800x480"      40.00    800  848  976 1056    480  637  641  672 -hsync -vsync

I still don't know why I had to use a different modeline, is my xenarc panel different from everyone elses xenarc panel? Additionally, despite getting the panel to go into 800x480@56, I'm terribly unsure if this modeline is actually the right one, or if its doing minor unnoticable damage to the panel everytime i run it this way. Of all the settings i tried in xvidtune I wasnt able to completely eliminate flicker. I tried getting the vrefresh higher, but anything minorly higher than 56 would make it worse, and then eventually go out of range of the panel. What is your refresh rate at when you go into 800x480?

I also don't know the exact horizsync and vrefresh xorg settings for the panel either, xenarcs website only lists the modeline that supposedly works. So for now I just ball park those numbers. Any help/insight you (or anyone else) has/have would be greatly appreciated..

Thanks

-p

Now that my system is installed, I notice some waviness on the screen...for a few minutes only, though. Then it gets much better.

It could be you've got a different revision of the Xenarc monitor that has a different display controller in it. It has been a while since I played with it, so all I've got to go on is my bad memory and the writeup I did at the beginning of this thread.