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fbcon: set_con2fb_map fixes

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set_con2fb_map() has regressed for some time.  Using fbcon=map:01, for
example, works only if there is only 1 working framebuffer. Trying to do a
set_con2fb_map() on a non-allocated vc will freeze the system.

- ensure that succeeding drivers after the first gets mapped to the console
- remove fbcon_preset_display() and modify fbcon_set_display() to include the
  former's functionality
- ensure that binding and unbinding succeeds if multiple drivers are mapped to
  the console

Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Antonino A. Daplas 2007-07-17 04:05:32 -07:00 committed by Linus Torvalds
parent 2f7bb99fc9
commit d1baa4ffa6
1 changed files with 25 additions and 39 deletions
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64
drivers/video/console/fbcon.c
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@ -192,9 +192,7 @@ static __inline__ void ypan_down(struct vc_data *vc, int count);
static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
int dy, int dx, int height, int width, u_int y_break);
static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
struct vc_data *vc);
static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
int unit);
int unit);
static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
int line, int count, int dy);
static void fbcon_modechanged(struct fb_info *info);
@ -745,7 +743,9 @@ static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
if (!err) {
info->fbcon_par = ops;
set_blitting_type(vc, info);
if (vc)
set_blitting_type(vc, info);
}
if (err) {
@ -807,11 +807,7 @@ static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
ops->flags |= FBCON_FLAGS_INIT;
ops->graphics = 0;
if (vc)
fbcon_set_disp(info, &info->var, vc);
else
fbcon_preset_disp(info, &info->var, unit);
fbcon_set_disp(info, &info->var, unit);
if (show_logo) {
struct vc_data *fg_vc = vc_cons[fg_console].d;
@ -1116,6 +1112,9 @@ static void fbcon_init(struct vc_data *vc, int init)
if (var_to_display(p, &info->var, info))
return;
if (!info->fbcon_par)
con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
/* If we are not the first console on this
fb, copy the font from that console */
t = &fb_display[fg_console];
@ -1382,36 +1381,29 @@ static int scrollback_phys_max = 0;
static int scrollback_max = 0;
static int scrollback_current = 0;
/*
* If no vc is existent yet, just set struct display
*/
static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
int unit)
{
struct display *p = &fb_display[unit];
struct display *t = &fb_display[fg_console];
if (var_to_display(p, var, info))
return;
p->fontdata = t->fontdata;
p->userfont = t->userfont;
if (p->userfont)
REFCOUNT(p->fontdata)++;
}
static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
struct vc_data *vc)
int unit)
{
struct display *p = &fb_display[vc->vc_num], *t;
struct vc_data **default_mode = vc->vc_display_fg;
struct vc_data *svc = *default_mode;
struct display *p, *t;
struct vc_data **default_mode, *vc;
struct vc_data *svc;
struct fbcon_ops *ops = info->fbcon_par;
int rows, cols, charcnt = 256;
p = &fb_display[unit];
if (var_to_display(p, var, info))
return;
vc = vc_cons[unit].d;
if (!vc)
return;
default_mode = vc->vc_display_fg;
svc = *default_mode;
t = &fb_display[svc->vc_num];
if (!vc->vc_font.data) {
vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
vc->vc_font.width = (*default_mode)->vc_font.width;
@ -3118,8 +3110,7 @@ static int fbcon_fb_registered(struct fb_info *info)
ret = fbcon_takeover(1);
} else {
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map_boot[i] == idx &&
con2fb_map[i] == -1)
if (con2fb_map_boot[i] == idx)
set_con2fb_map(i, idx, 0);
}
}
@ -3167,12 +3158,7 @@ static void fbcon_new_modelist(struct fb_info *info)
mode = fb_find_nearest_mode(fb_display[i].mode,
&info->modelist);
fb_videomode_to_var(&var, mode);
if (vc)
fbcon_set_disp(info, &var, vc);
else
fbcon_preset_disp(info, &var, i);
fbcon_set_disp(info, &var, vc->vc_num);
}
}