Hi Andreas,
On Sun, Nov 1, 2020 at 1:47 PM Andreas Schwab schwab@linux-m68k.org wrote:
On Nov 01 2020, Sam Ravnborg wrote:
On Sun, Nov 01, 2020 at 11:29:41AM +0100, Geert Uytterhoeven wrote:
The horizontal resolution (640) for the TT High video mode (1280x960) is definitely bogus. While fixing that, correct the timings to match the TTM195 service manual.
Signed-off-by: Geert Uytterhoeven geert@linux-m68k.org
--- a/drivers/video/fbdev/atafb.c +++ b/drivers/video/fbdev/atafb.c @@ -495,8 +495,8 @@ static struct fb_videomode atafb_modedb[] __initdata = { "tt-mid", 60, 640, 480, 31041, 120, 100, 8, 16, 140, 30, 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP }, {
/* 1280x960, 29 kHz, 60 Hz (TT high) */"tt-high", 57, 640, 960, 31041, 120, 100, 8, 16, 140, 30,
/* 1280x960, 72 kHz, 72 Hz (TT high) */"tt-high", 57, 1280, 960, 7761, 260, 60, 36, 4, 192, 4, 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAPWell-spotted. The change of 640 => 1280 is surely right. I have a harder time understanding why the change of pixclock from 31041 to 7761 is correct. All other modes have a pixclock close to or equal to 32000 - so it looks strange this one is off.
According to the Profibuch the pixclock should be about 95000.
Please have a look at the paragraph on p. 1052, and realize that it fails to take into account horizontal black/sync (the actual scan line length is 1792 not 1280 pixels) (thanks, Michael!).
Gr{oetje,eeting}s,
Geert