diff options
Diffstat (limited to 'drivers/video/console/dummycon.c')
| -rw-r--r-- | drivers/video/console/dummycon.c | 69 |
1 files changed, 61 insertions, 8 deletions
diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c index f2eafe2ed980..0254251fdd79 100644 --- a/drivers/video/console/dummycon.c +++ b/drivers/video/console/dummycon.c @@ -26,6 +26,67 @@ #define DUMMY_ROWS CONFIG_DUMMY_CONSOLE_ROWS #endif +#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER +/* These are both protected by the console_lock */ +static RAW_NOTIFIER_HEAD(dummycon_output_nh); +static bool dummycon_putc_called; + +void dummycon_register_output_notifier(struct notifier_block *nb) +{ + raw_notifier_chain_register(&dummycon_output_nh, nb); + + if (dummycon_putc_called) + nb->notifier_call(nb, 0, NULL); +} +EXPORT_SYMBOL_GPL(dummycon_register_output_notifier); + +void dummycon_unregister_output_notifier(struct notifier_block *nb) +{ + raw_notifier_chain_unregister(&dummycon_output_nh, nb); +} +EXPORT_SYMBOL_GPL(dummycon_unregister_output_notifier); + +static void dummycon_putc(struct vc_data *vc, int c, int ypos, int xpos) +{ + dummycon_putc_called = true; + raw_notifier_call_chain(&dummycon_output_nh, 0, NULL); +} + +static void dummycon_putcs(struct vc_data *vc, const unsigned short *s, + int count, int ypos, int xpos) +{ + int i; + + if (!dummycon_putc_called) { + /* Ignore erases */ + for (i = 0 ; i < count; i++) { + if (s[i] != vc->vc_video_erase_char) + break; + } + if (i == count) + return; + + dummycon_putc_called = true; + } + + raw_notifier_call_chain(&dummycon_output_nh, 0, NULL); +} + +static int dummycon_blank(struct vc_data *vc, int blank, int mode_switch) +{ + /* Redraw, so that we get putc(s) for output done while blanked */ + return 1; +} +#else +static void dummycon_putc(struct vc_data *vc, int c, int ypos, int xpos) { } +static void dummycon_putcs(struct vc_data *vc, const unsigned short *s, + int count, int ypos, int xpos) { } +static int dummycon_blank(struct vc_data *vc, int blank, int mode_switch) +{ + return 0; +} +#endif + static const char *dummycon_startup(void) { return "dummy device"; @@ -44,9 +105,6 @@ static void dummycon_init(struct vc_data *vc, int init) static void dummycon_deinit(struct vc_data *vc) { } static void dummycon_clear(struct vc_data *vc, int sy, int sx, int height, int width) { } -static void dummycon_putc(struct vc_data *vc, int c, int ypos, int xpos) { } -static void dummycon_putcs(struct vc_data *vc, const unsigned short *s, - int count, int ypos, int xpos) { } static void dummycon_cursor(struct vc_data *vc, int mode) { } static bool dummycon_scroll(struct vc_data *vc, unsigned int top, @@ -61,11 +119,6 @@ static int dummycon_switch(struct vc_data *vc) return 0; } -static int dummycon_blank(struct vc_data *vc, int blank, int mode_switch) -{ - return 0; -} - static int dummycon_font_set(struct vc_data *vc, struct console_font *font, unsigned int flags) { |