mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

dummycon: limit Arm console size hack to footbridge 

The dummycon default console size used to be determined by architecture,
but now this is a Kconfig setting on everything except ARM. Tracing this
back in the historic git trees, this was used to match the size of VGA
console or VGA framebuffer on early machines, but nowadays that code is
no longer used, except probably on the old footbridge/netwinder since
that is the only one that supports vgacon.

On machines with a framebuffer, booting with DT so far results in always
using the hardcoded 80x30 size in dummycon, while on ATAGS the setting
can come from a bootloader specific override. Both seem to be worse
choices than the Kconfig setting, since the actual text size for fbcon
also depends on the selected font.

Make this work the same way as everywhere else and use the normal
Kconfig setting, except for the footbridge with vgacon, which keeps
using the traditional code. If vgacon is disabled, footbridge can
also ignore the setting. This means the screen_info only has to be
provided when either vgacon or EFI are enabled now.

To limit the amount of surprises on Arm, change the Kconfig default
to the previously used 80x30 setting instead of the usual 80x25.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20231009211845.3136536-4-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2023-10-09 23:18:39 +02:00 committed by Greg Kroah-Hartman
parent 8a736ddfc8
commit 4293b09251
4 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/kernel/atags_parse.c
View File

@ -69,7 +69,7 @@ static int __init parse_tag_mem32(const struct tag *tag)
__tagtable(ATAG_MEM, parse_tag_mem32);
#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_VGA_CONSOLE)
static int __init parse_tag_videotext(const struct tag *tag)
{
screen_info.orig_x = tag->u.videotext.x;

3
arch/arm/kernel/setup.c
View File

@ -928,8 +928,7 @@ static void __init request_standard_resources(const struct machine_desc *mdesc)
request_resource(&ioport_resource, &lp2);
}
#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) || \
defined(CONFIG_EFI)
#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_EFI)
struct screen_info screen_info = {
.orig_video_lines = 30,
.orig_video_cols = 80,

5
drivers/video/console/Kconfig
View File

@ -52,7 +52,7 @@ config DUMMY_CONSOLE
config DUMMY_CONSOLE_COLUMNS
int "Initial number of console screen columns"
depends on DUMMY_CONSOLE && !ARM
depends on DUMMY_CONSOLE && !ARCH_FOOTBRIDGE
default 160 if PARISC
default 80
help
@ -62,8 +62,9 @@ config DUMMY_CONSOLE_COLUMNS
config DUMMY_CONSOLE_ROWS
int "Initial number of console screen rows"
depends on DUMMY_CONSOLE && !ARM
depends on DUMMY_CONSOLE && !ARCH_FOOTBRIDGE
default 64 if PARISC
default 30 if ARM
default 25
help
On PA-RISC, the default value is 64, which should fit a 1280x1024

2
drivers/video/console/dummycon.c
View File

@ -18,7 +18,7 @@
* Dummy console driver
*/
#if defined(__arm__)
#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_VGA_CONSOLE)
#define DUMMY_COLUMNS screen_info.orig_video_cols
#define DUMMY_ROWS screen_info.orig_video_lines
#else