On Thursday 17 February 2005 22:16, Frans Pop wrote:

On Thursday 17 February 2005 00:24, Antonino A. Daplas wrote:

quoted

quoted

Try this patch and let me know.

video=atyfb:comp_sync:<n>,vert_sync:<n>,hor_sync:<n>

n = 0 (low), 1 (high)

I've tested with the following combinations:
- append="video=atyfb:comp_sync:1,1024x768@70"
  Works perfectly: csync is high and good display.
- append="video=atyfb:comp_sync:1,hor_sync:1,vert_sync:0,1024x768@70"
  csync is high, but for some reason not hsync; display is good.

Okay, it seems that overriding the vsync and hsync settings is useless in
atyfb as it has its own algo to do that:

	if(vdisplay < 400) {
		h_sync_pol = 1;
		v_sync_pol = 0;
	} else if(vdisplay < 480) {
		h_sync_pol = 0;
		v_sync_pol = 1;
	} else if(vdisplay < 768) {
		h_sync_pol = 0;
		v_sync_pol = 0;
	} else {
		h_sync_pol = 1;
		v_sync_pol = 1;
	}

I'll trim the patch for csync only.

- append="video=atyfb:1024x768@70,comp_sync:1"
  Same results as first test.

The sync settings were checked with 'fbset -i'.

quoted

BTW, the mode string should always be the last parameter, ie;

video=atyfb:comp_sync:1,1024x768@70

Hmmm. Wonder why you say that (considering the result of my last test).

My mistake then.  Thanks for verifying.

Should these new options also be documented in Documentation/fb/?

I'll add this and fix a few buglets when I push upstream.

Tony




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