On Wed, 2010-09-08 at 15:38 +0200, ext Russ Dill wrote: > On Wed, Sep 8, 2010 at 6:39 AM, Tasslehoff Kjappfot <tasskjapp@xxxxxxxxx> wrote: > > > > > > Hi list :-) > > > > I had trouble getting a standard 800x600@60Hz VGA signal to display > > correctly on my monitors. Measuring the output showed that the front and > > back porches were swapped both for hsync and vsync. After reading the source > > I think I found the error in drivers/video/omap2/omapfb/omapfb-main.c. Patch > > attached. > > > > http://www.xfree86.org/3.3.6/fbdev6.html shows the way it should be, but > > todays code sets: > > > > hfp = left margin > > hbp = right margin > > vfp = upper margin > > vbp = lower margin > > > > I tested a patched kernel with 800x600@60Hz on two different monitors and a > > vga grabber, and it solved my issues. > > This looks good. Before this came up, I also thought that front porch > meant left margin, and back porch meant margin, but margins are named > in relation to pixel data, and porches are named in relation to sync > pulses. Ah, that's new to me too =). After a few minutes of googling, it's quite clear that the patch is correct. Thanks! I improved the patch description a bit, and added it to my tree. Tomi -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
