lkml.org 
[lkml]   [2011]   [Aug]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] video: Added a callback 'notify_after' for backlight control
Date
From: Dilan Lee <dilee@nvidia.com>

We need a callback to do some things after pwm_enable,pwm_disable
and pwm_config.

For example, GPIO backlight_en has to be rised after pwm has been enabled
to meet panel power on sequence defined in panel specification.

Signed-off-by: Dilan Lee <dilee@nvidia.com>
---
drivers/video/backlight/pwm_bl.c | 9 +++++++++
include/linux/pwm_backlight.h | 1 +
2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index b8f38ec..d9a16e5 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -28,6 +28,8 @@ struct pwm_bl_data {
unsigned int lth_brightness;
int (*notify)(struct device *,
int brightness);
+ void (*notify_after)(struct device *,
+ int brightness);
int (*check_fb)(struct device *, struct fb_info *);
};

@@ -55,6 +57,10 @@ static int pwm_backlight_update_status(struct backlight_device *bl)
pwm_config(pb->pwm, brightness, pb->period);
pwm_enable(pb->pwm);
}
+
+ if (pb->notify_after)
+ pb->notify_after(pb->dev, brightness);
+
return 0;
}

@@ -105,6 +111,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)

pb->period = data->pwm_period_ns;
pb->notify = data->notify;
+ pb->notify_after = data->notify_after;
pb->check_fb = data->check_fb;
pb->lth_brightness = data->lth_brightness *
(data->pwm_period_ns / data->max_brightness);
@@ -172,6 +179,8 @@ static int pwm_backlight_suspend(struct platform_device *pdev,
pb->notify(pb->dev, 0);
pwm_config(pb->pwm, 0, pb->period);
pwm_disable(pb->pwm);
+ if (pb->notify_after)
+ pb->notify_after(pb->dev, 0);
return 0;
}

diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
index 5e3e25a..63d2df4 100644
--- a/include/linux/pwm_backlight.h
+++ b/include/linux/pwm_backlight.h
@@ -14,6 +14,7 @@ struct platform_pwm_backlight_data {
unsigned int pwm_period_ns;
int (*init)(struct device *dev);
int (*notify)(struct device *dev, int brightness);
+ void (*notify_after)(struct device *dev, int brightness);
void (*exit)(struct device *dev);
int (*check_fb)(struct device *dev, struct fb_info *info);
};
--
1.7.5.4


\
 
 \ /
  Last update: 2011-08-08 12:41    [W:0.050 / U:0.380 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site