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authorAntonino A. Daplas <adaplas@gmail.com>2006-07-30 14:04:17 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-01 00:28:44 +0400
commit256154fbc31c25a8df4d398232acfa9d4892224c (patch)
tree278582add1a28766a1f3f4dba2f250cdbb191e0a
parent834a9b8ca7a01c34570be021f88e18884a29f048 (diff)
downloadlinux-256154fbc31c25a8df4d398232acfa9d4892224c.tar.xz
[PATCH] fbdev: statically link the framebuffer notification functions
The backlight and lcd subsystems can be notified by the framebuffer layer of blanking events. However, these subsystems, as a whole, can function independently from the framebuffer layer. But in order to enable to the lcd and backlight subsystems, the framebuffer has to be compiled also, effectively sucking in a huge amount of unneeded code. To prevent dependency problems, separate out the framebuffer notification mechanism from the framebuffer layer and permanently link it to the kernel. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/video/Kconfig2
-rw-r--r--drivers/video/Makefile1
-rw-r--r--drivers/video/backlight/Kconfig4
-rw-r--r--drivers/video/fb_notify.c46
-rw-r--r--drivers/video/fbmem.c54
-rw-r--r--include/linux/fb.h2
6 files changed, 62 insertions, 47 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 82288a7218d4..728cb5677725 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1620,7 +1620,7 @@ if FB || SGI_NEWPORT_CONSOLE
source "drivers/video/logo/Kconfig"
endif
-if FB && SYSFS
+if SYSFS
source "drivers/video/backlight/Kconfig"
endif
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 95563c9c6b9c..481c6c9695f8 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -4,6 +4,7 @@
# Each configuration option enables a list of files.
+obj-y += fb_notify.o
obj-$(CONFIG_FB) += fb.o
fb-y := fbmem.o fbmon.o fbcmap.o fbsysfs.o \
modedb.o fbcvt.o
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 022f9d3473f5..02f15297a021 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -10,7 +10,7 @@ menuconfig BACKLIGHT_LCD_SUPPORT
config BACKLIGHT_CLASS_DEVICE
tristate "Lowlevel Backlight controls"
- depends on BACKLIGHT_LCD_SUPPORT && FB
+ depends on BACKLIGHT_LCD_SUPPORT
default m
help
This framework adds support for low-level control of the LCD
@@ -26,7 +26,7 @@ config BACKLIGHT_DEVICE
config LCD_CLASS_DEVICE
tristate "Lowlevel LCD controls"
- depends on BACKLIGHT_LCD_SUPPORT && FB
+ depends on BACKLIGHT_LCD_SUPPORT
default m
help
This framework adds support for low-level control of LCD.
diff --git a/drivers/video/fb_notify.c b/drivers/video/fb_notify.c
new file mode 100644
index 000000000000..8c020389e4fa
--- /dev/null
+++ b/drivers/video/fb_notify.c
@@ -0,0 +1,46 @@
+/*
+ * linux/drivers/video/fb_notify.c
+ *
+ * Copyright (C) 2006 Antonino Daplas <adaplas@pol.net>
+ *
+ * 2001 - Documented with DocBook
+ * - Brad Douglas <brad@neruo.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+#include <linux/fb.h>
+#include <linux/notifier.h>
+
+static BLOCKING_NOTIFIER_HEAD(fb_notifier_list);
+
+/**
+ * fb_register_client - register a client notifier
+ * @nb: notifier block to callback on events
+ */
+int fb_register_client(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&fb_notifier_list, nb);
+}
+EXPORT_SYMBOL(fb_register_client);
+
+/**
+ * fb_unregister_client - unregister a client notifier
+ * @nb: notifier block to callback on events
+ */
+int fb_unregister_client(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&fb_notifier_list, nb);
+}
+EXPORT_SYMBOL(fb_unregister_client);
+
+/**
+ * fb_notifier_call_chain - notify clients of fb_events
+ *
+ */
+int fb_notifier_call_chain(unsigned long val, void *v)
+{
+ return blocking_notifier_call_chain(&fb_notifier_list, val, v);
+}
+EXPORT_SYMBOL_GPL(fb_notifier_call_chain);
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 4fc9df426c1a..17961e3ecaa0 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -52,7 +52,6 @@
#define FBPIXMAPSIZE (1024 * 8)
-static BLOCKING_NOTIFIER_HEAD(fb_notifier_list);
struct fb_info *registered_fb[FB_MAX];
int num_registered_fb;
@@ -791,8 +790,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
event.info = info;
event.data = &mode1;
- ret = blocking_notifier_call_chain(&fb_notifier_list,
- FB_EVENT_MODE_DELETE, &event);
+ ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
}
if (!ret)
@@ -837,8 +835,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
info->flags &= ~FBINFO_MISC_USEREVENT;
event.info = info;
- blocking_notifier_call_chain(&fb_notifier_list,
- evnt, &event);
+ fb_notifier_call_chain(evnt, &event);
}
}
}
@@ -861,8 +858,7 @@ fb_blank(struct fb_info *info, int blank)
event.info = info;
event.data = &blank;
- blocking_notifier_call_chain(&fb_notifier_list,
- FB_EVENT_BLANK, &event);
+ fb_notifier_call_chain(FB_EVENT_BLANK, &event);
}
return ret;
@@ -933,8 +929,7 @@ fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
con2fb.framebuffer = -1;
event.info = info;
event.data = &con2fb;
- blocking_notifier_call_chain(&fb_notifier_list,
- FB_EVENT_GET_CONSOLE_MAP, &event);
+ fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
return copy_to_user(argp, &con2fb,
sizeof(con2fb)) ? -EFAULT : 0;
case FBIOPUT_CON2FBMAP:
@@ -952,9 +947,8 @@ fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
return -EINVAL;
event.info = info;
event.data = &con2fb;
- return blocking_notifier_call_chain(&fb_notifier_list,
- FB_EVENT_SET_CONSOLE_MAP,
- &event);
+ return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP,
+ &event);
case FBIOBLANK:
acquire_console_sem();
info->flags |= FBINFO_MISC_USEREVENT;
@@ -1330,8 +1324,7 @@ register_framebuffer(struct fb_info *fb_info)
registered_fb[i] = fb_info;
event.info = fb_info;
- blocking_notifier_call_chain(&fb_notifier_list,
- FB_EVENT_FB_REGISTERED, &event);
+ fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
return 0;
}
@@ -1365,30 +1358,11 @@ unregister_framebuffer(struct fb_info *fb_info)
fb_cleanup_class_device(fb_info);
class_device_destroy(fb_class, MKDEV(FB_MAJOR, i));
event.info = fb_info;
- blocking_notifier_call_chain(&fb_notifier_list,
- FB_EVENT_FB_UNREGISTERED, &event);
+ fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
return 0;
}
/**
- * fb_register_client - register a client notifier
- * @nb: notifier block to callback on events
- */
-int fb_register_client(struct notifier_block *nb)
-{
- return blocking_notifier_chain_register(&fb_notifier_list, nb);
-}
-
-/**
- * fb_unregister_client - unregister a client notifier
- * @nb: notifier block to callback on events
- */
-int fb_unregister_client(struct notifier_block *nb)
-{
- return blocking_notifier_chain_unregister(&fb_notifier_list, nb);
-}
-
-/**
* fb_set_suspend - low level driver signals suspend
* @info: framebuffer affected
* @state: 0 = resuming, !=0 = suspending
@@ -1403,13 +1377,11 @@ void fb_set_suspend(struct fb_info *info, int state)
event.info = info;
if (state) {
- blocking_notifier_call_chain(&fb_notifier_list,
- FB_EVENT_SUSPEND, &event);
+ fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
info->state = FBINFO_STATE_SUSPENDED;
} else {
info->state = FBINFO_STATE_RUNNING;
- blocking_notifier_call_chain(&fb_notifier_list,
- FB_EVENT_RESUME, &event);
+ fb_notifier_call_chain(FB_EVENT_RESUME, &event);
}
}
@@ -1480,9 +1452,7 @@ int fb_new_modelist(struct fb_info *info)
if (!list_empty(&info->modelist)) {
event.info = info;
- err = blocking_notifier_call_chain(&fb_notifier_list,
- FB_EVENT_NEW_MODELIST,
- &event);
+ err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
}
return err;
@@ -1594,8 +1564,6 @@ EXPORT_SYMBOL(fb_blank);
EXPORT_SYMBOL(fb_pan_display);
EXPORT_SYMBOL(fb_get_buffer_offset);
EXPORT_SYMBOL(fb_set_suspend);
-EXPORT_SYMBOL(fb_register_client);
-EXPORT_SYMBOL(fb_unregister_client);
EXPORT_SYMBOL(fb_get_options);
MODULE_LICENSE("GPL");
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 405f44e44e5d..4ad0673b1995 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -524,7 +524,7 @@ struct fb_event {
extern int fb_register_client(struct notifier_block *nb);
extern int fb_unregister_client(struct notifier_block *nb);
-
+extern int fb_notifier_call_chain(unsigned long val, void *v);
/*
* Pixmap structure definition
*