pwm-backlight: handle BL_CORE_FBBLANK state

According to include/linux/backlight.h, the fb_blank field is to be
removed and blank status should preferably be set by setting the
BL_CORE_FBBLANK bit of the state field. This patch ensures this
condition is also taken into account when updating the backlight state.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 069983ca49ff..4af6d1302f17 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -41,10 +41,9 @@ static int pwm_backlight_update_status(struct backlight_device *bl)
         int brightness = bl->props.brightness;
         int max = bl->props.max_brightness;
 
-        if (bl->props.power != FB_BLANK_UNBLANK)
-                brightness = 0;
-
-        if (bl->props.fb_blank != FB_BLANK_UNBLANK)
+        if (bl->props.power != FB_BLANK_UNBLANK ||
+            bl->props.fb_blank != FB_BLANK_UNBLANK ||
+            bl->props.state & BL_CORE_FBBLANK)
                 brightness = 0;
 
         if (pb->notify)