From 3866cba87dcd0162fb41e9b3b653d0af68fad5ec Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Thu, 2 Jun 2022 22:08:38 +0200
Subject: fbcon: Fix accelerated fbdev scrolling while logo is still shown
Git-commit: 3866cba87dcd0162fb41e9b3b653d0af68fad5ec
Patch-mainline: v6.0-rc1
References: bsc#1152472
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 <daniel.vetter@ffwll.ch>
Signed-off-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/YpkYxk7wsBPx3po+@p100
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/video/fbdev/core/fbcon.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index d765bbdf19dc..cb8d94d7feba 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -1758,8 +1758,6 @@ 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,
@@ -1848,8 +1846,6 @@ 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,
--
2.37.3