fbdev: add events for early fb event support (bf05929f) · Commits · 戴 / test

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 <inki.dae@samsung.com> Signed-off-by:

Kyungmin Park <kyungmin.park@samsung.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Acked-by:

Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/fbmem.c

+15 −6

Original line number	Diff line number	Diff line
		@@ -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;

include/linux/fb.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -554,6 +554,10 @@ struct fb_cursor_user {
		#define FB_EVENT_FB_UNBIND 0x0E
		/* CONSOLE-SPECIFIC: remap all consoles to new fb - for vga switcheroo */
		#define FB_EVENT_REMAP_ALL_CONSOLE 0x0F
		/* A hardware display blank early change occured */
		#define FB_EARLY_EVENT_BLANK 0x10
		/* A hardware display blank revert early change occured */
		#define FB_R_EARLY_EVENT_BLANK 0x11

		struct fb_event {
		struct fb_info *info;

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