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authorRobert Morell <rmorell@nvidia.com>2011-03-23 02:30:31 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-23 03:44:00 +0300
commitef0a5e80f56f6409e957e7117da9551c3d3ff239 (patch)
tree718bcc9cbab5ffaeb07d65eb5d0eebbb80af3801 /include/linux/pwm_backlight.h
parent0508e04e05cdf9b819210f5d5a12264e5eeff1f3 (diff)
downloadlinux-ef0a5e80f56f6409e957e7117da9551c3d3ff239.tar.xz
pwm_backlight: add check_fb() hook
In systems with multiple framebuffer devices, one of the devices might be blanked while another is unblanked. In order for the backlight blanking logic to know whether to turn off the backlight for a particular framebuffer's blanking notification, it needs to be able to check if a given framebuffer device corresponds to the backlight. This plumbs the check_fb hook from core backlight through the pwm_backlight helper to allow platform code to plug in a check_fb hook. Signed-off-by: Robert Morell <rmorell@nvidia.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Arun Murthy <arun.murthy@stericsson.com> Cc: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/pwm_backlight.h')
-rw-r--r--include/linux/pwm_backlight.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
index e031e1a486d9..5e3e25a3c9c3 100644
--- a/include/linux/pwm_backlight.h
+++ b/include/linux/pwm_backlight.h
@@ -4,6 +4,8 @@
#ifndef __LINUX_PWM_BACKLIGHT_H
#define __LINUX_PWM_BACKLIGHT_H
+#include <linux/backlight.h>
+
struct platform_pwm_backlight_data {
int pwm_id;
unsigned int max_brightness;
@@ -13,6 +15,7 @@ struct platform_pwm_backlight_data {
int (*init)(struct device *dev);
int (*notify)(struct device *dev, int brightness);
void (*exit)(struct device *dev);
+ int (*check_fb)(struct device *dev, struct fb_info *info);
};
#endif