From: Geert Uytterhoeven Date: Mon, 11 Jul 2022 15:50:34 +0000 (+0200) Subject: video: fbdev: atari: Remove backward bug-compatibility X-Git-Tag: v6.1-rc5~667^2~13 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ffcc5b265799f213612984aa27d3711dbc4704b6;p=platform%2Fkernel%2Flinux-starfive.git video: fbdev: atari: Remove backward bug-compatibility As of v2.1.0, falcon_decode_var() contains a quirk to fix a rounding error, as explained by Günther Kelleter on Fri, 30 Aug 1996: This diff removes the now obsolete Falcon video option "pwrsave", and fixes a rounding error that is triggered by the resolution switching X server (those who use the pixel clock value 39722 in their /etc/fb.modes should change it to 39721). However, this causes the modified video mode returned by falcon_decode_var() to not match the video mode returned by falcon_encode_var(). Fix this by dropping the quirk. Unfortunately /etc/fb.modes in fbset was never updated, so the "640x480-60" mode still contains the wrong pixclock. Hence this change may introduce a regression. Signed-off-by: Geert Uytterhoeven Tested-by: Michael Schmitz Signed-off-by: Helge Deller --- diff --git a/drivers/video/fbdev/atafb.c b/drivers/video/fbdev/atafb.c index e8b178e..2bc4089 100644 --- a/drivers/video/fbdev/atafb.c +++ b/drivers/video/fbdev/atafb.c @@ -1008,10 +1008,6 @@ static int falcon_decode_var(struct fb_var_screeninfo *var, else if (yres_virtual < yres) yres_virtual = yres; - /* backward bug-compatibility */ - if (var->pixclock > 1) - var->pixclock -= 1; - par->hw.falcon.line_width = bpp * xres / 16; par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;