diff options
Diffstat (limited to 'drivers/video/fbdev/core/fbcon.c')
| -rw-r--r-- | drivers/video/fbdev/core/fbcon.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index c910e74d46ff..5fb156bdcf4e 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -129,6 +129,12 @@ static inline void fbcon_map_override(void) } #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ +#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER +static bool deferred_takeover = true; +#else +#define deferred_takeover false +#endif + /* font data */ static char fontname[40]; @@ -499,6 +505,12 @@ static int __init fb_console_setup(char *this_opt) margin_color = simple_strtoul(options, &options, 0); continue; } +#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER + if (!strcmp(options, "nodefer")) { + deferred_takeover = false; + continue; + } +#endif } return 1; } @@ -828,6 +840,8 @@ static int set_con2fb_map(int unit, int newidx, int user) struct fb_info *oldinfo = NULL; int found, err = 0; + WARN_CONSOLE_UNLOCKED(); + if (oldidx == newidx) return 0; @@ -3044,6 +3058,8 @@ static int fbcon_fb_unbind(int idx) { int i, new_idx = -1, ret = 0; + WARN_CONSOLE_UNLOCKED(); + if (!fbcon_has_console_bind) return 0; @@ -3094,6 +3110,11 @@ static int fbcon_fb_unregistered(struct fb_info *info) { int i, idx; + WARN_CONSOLE_UNLOCKED(); + + if (deferred_takeover) + return 0; + idx = info->node; for (i = first_fb_vc; i <= last_fb_vc; i++) { if (con2fb_map[i] == idx) @@ -3131,6 +3152,16 @@ static int fbcon_fb_unregistered(struct fb_info *info) static void fbcon_remap_all(int idx) { int i; + + WARN_CONSOLE_UNLOCKED(); + + if (deferred_takeover) { + for (i = first_fb_vc; i <= last_fb_vc; i++) + con2fb_map_boot[i] = idx; + fbcon_map_override(); + return; + } + for (i = first_fb_vc; i <= last_fb_vc; i++) set_con2fb_map(i, idx, 0); @@ -3177,9 +3208,16 @@ static int fbcon_fb_registered(struct fb_info *info) { int ret = 0, i, idx; + WARN_CONSOLE_UNLOCKED(); + idx = info->node; fbcon_select_primary(info); + if (deferred_takeover) { + pr_info("fbcon: Deferring console take-over\n"); + return 0; + } + if (info_idx == -1) { for (i = first_fb_vc; i <= last_fb_vc; i++) { if (con2fb_map_boot[i] == idx) { @@ -3555,8 +3593,46 @@ static int fbcon_init_device(void) return 0; } +#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER +static struct notifier_block fbcon_output_nb; + +static int fbcon_output_notifier(struct notifier_block *nb, + unsigned long action, void *data) +{ + int i; + + WARN_CONSOLE_UNLOCKED(); + + pr_info("fbcon: Taking over console\n"); + + dummycon_unregister_output_notifier(&fbcon_output_nb); + deferred_takeover = false; + logo_shown = FBCON_LOGO_DONTSHOW; + + for (i = 0; i < FB_MAX; i++) { + if (registered_fb[i]) + fbcon_fb_registered(registered_fb[i]); + } + + return NOTIFY_OK; +} + +static void fbcon_register_output_notifier(void) +{ + fbcon_output_nb.notifier_call = fbcon_output_notifier; + dummycon_register_output_notifier(&fbcon_output_nb); +} +#else +static inline void fbcon_register_output_notifier(void) {} +#endif + static void fbcon_start(void) { + if (deferred_takeover) { + fbcon_register_output_notifier(); + return; + } + if (num_registered_fb) { int i; @@ -3583,6 +3659,13 @@ static void fbcon_exit(void) if (fbcon_has_exited) return; +#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER + if (deferred_takeover) { + dummycon_unregister_output_notifier(&fbcon_output_nb); + deferred_takeover = false; + } +#endif + kfree((void *)softback_buf); softback_buf = 0UL; |