diff options
| -rw-r--r-- | drivers/video/backlight/backlight.c | 23 | ||||
| -rw-r--r-- | include/linux/backlight.h | 6 |
2 files changed, 24 insertions, 5 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index 5d05555fe84..efc9a2da918 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -41,6 +41,8 @@ static int fb_notifier_callback(struct notifier_block *self, { struct backlight_device *bd; struct fb_event *evdata = data; + int node = evdata->info->node; + int fb_blank = 0; /* If we aren't interested in this event, skip it immediately ... */ if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK) @@ -51,11 +53,22 @@ static int fb_notifier_callback(struct notifier_block *self, if (bd->ops) if (!bd->ops->check_fb || bd->ops->check_fb(bd, evdata->info)) { - bd->props.fb_blank = *(int *)evdata->data; - if (bd->props.fb_blank == FB_BLANK_UNBLANK) - bd->props.state &= ~BL_CORE_FBBLANK; - else - bd->props.state |= BL_CORE_FBBLANK; + fb_blank = *(int *)evdata->data; + if (fb_blank == FB_BLANK_UNBLANK && + !bd->fb_bl_on[node]) { + bd->fb_bl_on[node] = true; + if (!bd->use_count++) { + bd->props.state &= ~BL_CORE_FBBLANK; + bd->props.fb_blank = FB_BLANK_UNBLANK; + } + } else if (fb_blank != FB_BLANK_UNBLANK && + bd->fb_bl_on[node]) { + bd->fb_bl_on[node] = false; + if (!(--bd->use_count)) { + bd->props.state |= BL_CORE_FBBLANK; + bd->props.fb_blank = fb_blank; + } + } backlight_update_status(bd); } mutex_unlock(&bd->ops_lock); diff --git a/include/linux/backlight.h b/include/linux/backlight.h index 5f9cd963213..72647429adf 100644 --- a/include/linux/backlight.h +++ b/include/linux/backlight.h @@ -9,6 +9,7 @@ #define _LINUX_BACKLIGHT_H #include <linux/device.h> +#include <linux/fb.h> #include <linux/mutex.h> #include <linux/notifier.h> @@ -104,6 +105,11 @@ struct backlight_device { struct list_head entry; struct device dev; + + /* Multiple framebuffers may share one backlight device */ + bool fb_bl_on[FB_MAX]; + + int use_count; }; static inline void backlight_update_status(struct backlight_device *bd) |