[PATCH] Add sysfs entry to disable framebuffer access

What

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c
index 08dac9580d15..0a1dc1b4b509 100644
--- a/drivers/video/fbsysfs.c
+++ b/drivers/video/fbsysfs.c
@@ -492,6 +492,28 @@ static ssize_t show_name(struct class_device *class_device, char *buf)
         return snprintf(buf, PAGE_SIZE, "%s\n", fb_info->fix.id);
 }
 
+static ssize_t store_fbstate(struct class_device *class_device,
+                        const char *buf, size_t count)
+{
+        struct fb_info *fb_info = class_get_devdata(class_device);
+        u32 state;
+        char *last = NULL;
+
+        state = simple_strtoul(buf, &last, 0);
+
+        acquire_console_sem();
+        fb_set_suspend(fb_info, (int)state);
+        release_console_sem();
+
+        return count;
+}
+
+static ssize_t show_fbstate(struct class_device *class_device, char *buf)
+{
+        struct fb_info *fb_info = class_get_devdata(class_device);
+        return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->state);
+}
+
 static struct class_device_attribute class_device_attrs[] = {
         __ATTR(bits_per_pixel, S_IRUGO|S_IWUSR, show_bpp, store_bpp),
         __ATTR(blank, S_IRUGO|S_IWUSR, show_blank, store_blank),
@@ -507,6 +529,7 @@ static struct class_device_attribute class_device_attrs[] = {
         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
         __ATTR(con_rotate, S_IRUGO|S_IWUSR, show_con_rotate, store_con_rotate),
         __ATTR(con_rotate_all, S_IWUSR, NULL, store_con_rotate_all),
+        __ATTR(state, S_IRUGO|S_IWUSR, show_fbstate, store_fbstate),
 };
 
 int fb_init_class_device(struct fb_info *fb_info)