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fbdev: add events for early fb event support

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Add FB_EARLY_EVENT_BLANK and FB_R_EARLY_EVENT_BLANK event mode supports.
first, fb_notifier_call_chain() is called with FB_EARLY_EVENT_BLANK and
fb_blank() of specific fb driver is called and then
fb_notifier_call_chain() is called with FB_EVENT_BLANK again at
fb_blank().  and if fb_blank() was failed then fb_nitifier_call_chain()
would be called with FB_R_EARLY_EVENT_BLANK to revert the previous
effects.

Signed-off-by: Inki Dae <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Cc: Lars-Peter Clausen <[email protected]>
Acked-by: Florian Tobias Schandinat <[email protected]>
Cc: Richard Purdie <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Inki Dae 2012-05-29 15:07:12 -07:00 • committed by Linus Torvalds
commit bf05929f41
2 changed files with 19 additions and 6 deletions
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21
drivers/video/fbmem.c
View file

@ -1046,20 +1046,29 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
int
fb_blank(struct fb_info *info, int blank)
{
int ret = -EINVAL;
struct fb_event event;
int ret = -EINVAL, early_ret;
if (blank > FB_BLANK_POWERDOWN)
blank = FB_BLANK_POWERDOWN;
event.info = info;
event.data = &blank;
early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
if (info->fbops->fb_blank)
ret = info->fbops->fb_blank(blank, info);
if (!ret) {
struct fb_event event;
event.info = info;
event.data = &blank;
if (!ret)
fb_notifier_call_chain(FB_EVENT_BLANK, &event);
else {
/*
* if fb_blank is failed then revert effects of
* the early blank event.
*/
if (!early_ret)
fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event);
}
return ret;