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fbdev: fbmem: allow overriding the number of bootup logos 

Probably most useful if you want no logo at all, or if you only want one
logo regardless of how many CPU cores you have.

Signed-off-by: Peter Rosin <peda@axentia.se>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190827110854.12574-3-peda@axentia.se
alistair/sensors
Peter Rosin 2019-08-27 11:09:21 +00:00 committed by Bartlomiej Zolnierkiewicz
parent fd933c00eb
commit 691f50ab27
4 changed files with 22 additions and 3 deletions
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5
Documentation/fb/fbcon.rst
View File

@ -174,6 +174,11 @@ C. Boot options
displayed due to multiple CPUs, the collected line of logos is moved
as a whole.
9. fbcon=logo-count:<n>
The value 'n' overrides the number of bootup logos. 0 disables the
logo, and -1 gives the default which is the number of online CPUs.
C. Attaching, Detaching and Unloading
Before going on to how to attach, detach and unload the framebuffer console, an

7
drivers/video/fbdev/core/fbcon.c
View File

@ -536,6 +536,13 @@ static int __init fb_console_setup(char *this_opt)
fb_center_logo = true;
continue;
}
if (!strncmp(options, "logo-count:", 11)) {
options += 11;
if (*options)
fb_logo_count = simple_strtol(options, &options, 0);
continue;
}
}
return 1;
}

12
drivers/video/fbdev/core/fbmem.c
View File

@ -56,6 +56,8 @@ EXPORT_SYMBOL(num_registered_fb);
bool fb_center_logo __read_mostly;
EXPORT_SYMBOL(fb_center_logo);
int fb_logo_count __read_mostly = -1;
static struct fb_info *get_fb_info(unsigned int idx)
{
struct fb_info *fb_info;
@ -620,7 +622,7 @@ int fb_prepare_logo(struct fb_info *info, int rotate)
memset(&fb_logo, 0, sizeof(struct logo_data));
if (info->flags & FBINFO_MISC_TILEBLITTING ||
info->fbops->owner)
info->fbops->owner || !fb_logo_count)
return 0;
if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
@ -686,10 +688,14 @@ int fb_prepare_logo(struct fb_info *info, int rotate)
int fb_show_logo(struct fb_info *info, int rotate)
{
unsigned int count;
int y;
y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
num_online_cpus());
if (!fb_logo_count)
return 0;
count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count;
y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count);
y = fb_show_extra_logos(info, y, rotate);
return y;

1
include/linux/fb.h
View File

@ -625,6 +625,7 @@ extern int fb_new_modelist(struct fb_info *info);
extern struct fb_info *registered_fb[FB_MAX];
extern int num_registered_fb;
extern bool fb_center_logo;
extern int fb_logo_count;
extern struct class *fb_class;
#define for_each_registered_fb(i) \