From: Helge Deller Date: Thu, 2 Jun 2022 20:08:38 +0000 (+0200) Subject: fbcon: Fix accelerated fbdev scrolling while logo is still shown X-Git-Tag: v5.15.73~1760 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d0d6186eae6197c55079adac43e4a8d93baaf8d7;p=platform%2Fkernel%2Flinux-rpi.git fbcon: Fix accelerated fbdev scrolling while logo is still shown commit 3866cba87dcd0162fb41e9b3b653d0af68fad5ec upstream. There is no need to directly skip over to the SCROLL_REDRAW case while the logo is still shown. When using DRM, this change has no effect because the code will reach the SCROLL_REDRAW case immediately anyway. But if you run an accelerated fbdev driver and have FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION enabled, console scrolling is slowed down by factors so that it feels as if you use a 9600 baud terminal. So, drop those unnecessary checks and speed up fbdev console acceleration during bootup. Cc: stable@vger.kernel.org # v5.10+ Acked-by: Daniel Vetter Signed-off-by: Helge Deller Link: https://patchwork.freedesktop.org/patch/msgid/YpkYxk7wsBPx3po+@p100 Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index c1362c13..fb02105 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -1706,8 +1706,6 @@ static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, case SM_UP: if (count > vc->vc_rows) /* Maximum realistic size */ count = vc->vc_rows; - if (logo_shown >= 0) - goto redraw_up; switch (fb_scrollmode(p)) { case SCROLL_MOVE: fbcon_redraw_blit(vc, info, p, t, b - t - count, @@ -1796,8 +1794,6 @@ static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, case SM_DOWN: if (count > vc->vc_rows) /* Maximum realistic size */ count = vc->vc_rows; - if (logo_shown >= 0) - goto redraw_down; switch (fb_scrollmode(p)) { case SCROLL_MOVE: fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,