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: Richard Purdie <rpurdie@rpsys.net>
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 4f987c4..5490b2a 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -28,7 +28,7 @@
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);
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index be3f2c3..0429fd2 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -2233,6 +2233,8 @@
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 @@
fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
vc->vc_video_erase_char = oldc;
}
+
+
+ event.info = info;
+ event.data = ␣
+ fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
}
static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
diff --git a/include/linux/fb.h b/include/linux/fb.h
index a78e256..bf7158b 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -516,13 +516,15 @@
#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;