This adds notifier callback for VT events. We are currently interested in the VT_UPDATE event, which indicates there was some major change to the VT. This is used to redraw the margins. For example when the console is inverted we receive the VT_UPDATE event. The color of the margins depend on the inverted state, so it is necessary redraw the margins at this time.
Signed-off-by: David Lechner <[email protected]> --- drivers/video/console/fbcon.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index 12ded23..8e7ac2f 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -3329,6 +3329,28 @@ static int fbcon_event_notify(struct notifier_block *self, return ret; } +static int vt_notifier_call(struct notifier_block *blk, + unsigned long code, void *_param) +{ + struct vt_notifier_param *param = _param; + struct vc_data *vc = param->vc; + + switch (code) { + case VT_UPDATE: + /* + * This event could indicate that the terminal has been + * inverted (or there was some other major change), in which + * case we need to re-draw the margins. + */ + if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) + fbcon_clear_margins(vc, 0); + break; + default: + break; + } + return NOTIFY_OK; +} + /* * The console `switch' structure for the frame buffer based console */ @@ -3364,6 +3386,10 @@ static struct notifier_block fbcon_event_notifier = { .notifier_call = fbcon_event_notify, }; +static struct notifier_block vt_notifier_block = { + .notifier_call = vt_notifier_call, +}; + static ssize_t store_rotate(struct device *device, struct device_attribute *attr, const char *buf, size_t count) @@ -3612,6 +3638,7 @@ static int __init fb_console_init(void) console_lock(); fb_register_client(&fbcon_event_notifier); + register_vt_notifier(&vt_notifier_block); fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon"); @@ -3650,6 +3677,7 @@ static void __exit fbcon_deinit_device(void) static void __exit fb_console_exit(void) { console_lock(); + unregister_vt_notifier(&vt_notifier_block); fb_unregister_client(&fbcon_event_notifier); fbcon_deinit_device(); device_destroy(fb_class, MKDEV(0, 0)); -- 2.7.4
