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Commit 994efacd authored by Richard Purdie's avatar Richard Purdie
Browse files

backlight/fbcon: Add FB_EVENT_CONBLANK 



The backlight class wants notification whenever the console is blanked
but doesn't get this when hardware blanking fails and software blanking
is used. Changing FB_EVENT_BLANK to report both would be a behaviour
change which could confuse the console layer so add a new event for
software blanking and have the backlight class listen for both.

Signed-off-by: default avatarRichard Purdie <rpurdie@rpsys.net>
parent 34f18a71

drivers/video/backlight/backlight.c

+1 −1
Original line number Diff line number Diff line
@@ -28,7 +28,7 @@ static int fb_notifier_callback(struct notifier_block *self, 
	struct fb_event *evdata = data;



	/* If we aren't interested in this event, skip it immediately ... */

	if (event != FB_EVENT_BLANK)

	if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)

		return 0;



	bd = container_of(self, struct backlight_device, fb_notif);

drivers/video/console/fbcon.c

+7 −0
Original line number Diff line number Diff line
@@ -2233,6 +2233,8 @@ static int fbcon_switch(struct vc_data *vc) 
static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,

				int blank)

{

	struct fb_event event;



	if (blank) {

		unsigned short charmask = vc->vc_hi_font_mask ?

			0x1ff : 0xff;
@@ -2243,6 +2245,11 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 
		fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);

		vc->vc_video_erase_char = oldc;

	}





	event.info = info;

	event.data = &blank;

	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);

}



static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)

include/linux/fb.h

+3 −1
Original line number Diff line number Diff line
@@ -516,13 +516,15 @@ struct fb_cursor_user { 
#define FB_EVENT_GET_CONSOLE_MAP        0x07

/*      CONSOLE-SPECIFIC: set console to framebuffer mapping */

#define FB_EVENT_SET_CONSOLE_MAP        0x08

/*      A display blank is requested       */

/*      A hardware display blank change occured */

#define FB_EVENT_BLANK                  0x09

/*      Private modelist is to be replaced */

#define FB_EVENT_NEW_MODELIST           0x0A

/*	The resolution of the passed in fb_info about to change and

        all vc's should be changed         */

#define FB_EVENT_MODE_CHANGE_ALL	0x0B

/*	A software display blank change occured */

#define FB_EVENT_CONBLANK               0x0C



struct fb_event {

	struct fb_info *info;