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1920x1080 crtc-settings parameters

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1920x1080 crtc-settings parameters

Postby Pilotek » Wed Feb 16, 2011 3:37 pm

Do you somebody know valid crtc-settings parameters for 1920x1080 wide resolution? I mean those things:
- refresh - 60
- pclock
- hpol
- vpol
- htotal
- hblank_start - 1920
- hblank_len
- hsync_start
- hsync_len
- vtotal
- vblank_start - 1080
- vblank_len
- vsync_start
- vsync_len
I would appreciate to have them too, thank you.
Pilotek
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RE: 1920x1080 crtc-settings parameters

Postby ianc » Wed Feb 16, 2011 9:47 pm

crttrap ?
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RE: 1920x1080 crtc-settings parameters

Postby Pilotek » Mon Feb 21, 2011 7:30 am

I think crttrap only "probes" video chipset from "known" supported chipsets and uses crtc-settings file of "known" resolutions/color depths - as far as I know crtc-settings "knows" only standard (not wide) resolutions.
Pilotek
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Posts: 124
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Re: 1920x1080 crtc-settings parameters

Postby lada » Wed Feb 23, 2011 3:12 pm

[Proper crtc-setting vary not only for resolution but also for display vendors. Try to find device correct time parameters on in internet.
You can also download moninfo.exe. Find line Modeline and derive parametres to crtc-settings.

Example:
Modeline "1600x1200" F=162.00 H1=1600 H2=1664 H3=1856 H4=2160 V1=1200 V2=1201 V3=1204 V4=1250 +hsync +vsync

crtc-setting:

pclock = F*1000
hsync -> hpol
vsync -> vpol

htotal = H4
hblank_start = H1
hblank_len = H4 - H1
hsync_start = H2
hsync_len = H3 - H2

vtotal = V4
vblank_start = V1
vblank_len = V4 - V1
vsync_start = V2
vsync_len = V3 - V2

Regards,
Vladimir
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RE: Re: 1920x1080 crtc-settings parameters

Postby koko » Thu Feb 24, 2011 11:18 pm

Hi Vladimir,
What are the values for hsync and vsync?
Thanks,
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RE: Re: 1920x1080 crtc-settings parameters

Postby Pilotek » Mon Feb 28, 2011 12:28 pm

To Vladimir: Thank you very much. At meantime I "derived" somehow the parameters for my display after reading an article on monitor timing principles on the web.

To koko: hsync and vsync "values" are "+" or "-". QNX crtc-settings' equivalents are hpol and vpol (polarity) where 0 means - (minus) and 1 means + (plus), I think.
Pilotek
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Posts: 124
Joined: Thu Jan 25, 2007 3:52 pm


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