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| author | Jiri Slaby (SUSE) <jirislaby@kernel.org> | 2024-01-22 12:03:15 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-27 18:08:52 -0800 |
| commit | 174657478cd8425288aeabf93b964b9387e096fa (patch) | |
| tree | 28d40dbf322ec429cf064b508c22a4e91541acf7 /drivers/video | |
| parent | 6613476e225e090cc9aad49be7fa504e290dd33d (diff) | |
| download | linux-174657478cd8425288aeabf93b964b9387e096fa.tar.gz linux-174657478cd8425288aeabf93b964b9387e096fa.tar.bz2 linux-174657478cd8425288aeabf93b964b9387e096fa.zip | |
vgacon: inline vc_scrolldelta_helper() into vgacon_scrolldelta()
Since commit 74d58cd48a8f ("USB: sisusbvga: remove console support"),
vgacon_scrolldelta() is the only user of vc_scrolldelta_helper().
Inline the helper into vgacon_scrolldelta() and drop it.
Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Tested-by: Helge Deller <deller@gmx.de> # parisc STI console
Link: https://lore.kernel.org/r/20240122110401.7289-2-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/console/vgacon.c | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index 8ef1579fa57f..9176fff9ce6e 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -138,8 +138,40 @@ static inline void vga_set_mem_top(struct vc_data *c) static void vgacon_scrolldelta(struct vc_data *c, int lines) { - vc_scrolldelta_helper(c, lines, vga_rolled_over, (void *)vga_vram_base, - vga_vram_size); + unsigned long scr_end = c->vc_scr_end - vga_vram_base; + unsigned long vorigin = c->vc_visible_origin - vga_vram_base; + unsigned long origin = c->vc_origin - vga_vram_base; + int margin = c->vc_size_row * 4; + int from, wrap, from_off, avail; + + /* Turn scrollback off */ + if (!lines) { + c->vc_visible_origin = c->vc_origin; + return; + } + + /* Do we have already enough to allow jumping from 0 to the end? */ + if (vga_rolled_over > scr_end + margin) { + from = scr_end; + wrap = vga_rolled_over + c->vc_size_row; + } else { + from = 0; + wrap = vga_vram_size; + } + + from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row; + avail = (origin - from + wrap) % wrap; + + /* Only a little piece would be left? Show all incl. the piece! */ + if (avail < 2 * margin) + margin = 0; + if (from_off < margin) + from_off = 0; + if (from_off > avail - margin) + from_off = avail; + + c->vc_visible_origin = vga_vram_base + (from + from_off) % wrap; + vga_set_mem_top(c); } |