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ledtrig-backlight: futile attempt to make the backlight turn on sooner by doing it at FB registration. Seems we need to do it even sooner..

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This commit is contained in:
Matt Sealey
2011-02-17 15:41:15 -06:00
parent 1ee494bab7
commit 8bd1f3b92f
1 changed files with 33 additions and 14 deletions
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47
drivers/leds/ledtrig-backlight.c
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@@ -17,9 +17,6 @@
#include <linux/leds.h>
#include "leds.h"
#define BLANK 1
#define UNBLANK 0
struct bl_trig_notifier {
struct led_classdev *led;
int brightness;
@@ -27,25 +24,47 @@ struct bl_trig_notifier {
struct notifier_block notifier;
};
static void bl_blank(struct bl_trig_notifier *n, int type)
{
struct led_classdev *led = n->led;
switch (type) {
case FB_BLANK_UNBLANK:
if (n->old_status != FB_BLANK_UNBLANK) {
led_set_brightness(led, n->brightness);
n->old_status = type;
}
break;
case FB_BLANK_NORMAL:
case FB_BLANK_POWERDOWN:
case FB_BLANK_VSYNC_SUSPEND:
case FB_BLANK_HSYNC_SUSPEND:
if (n->old_status == FB_BLANK_UNBLANK) {
n->brightness = led->brightness;
led_set_brightness(led, LED_OFF);
n->old_status = type;
}
break;
}
}
static int fb_notifier_callback(struct notifier_block *p,
unsigned long event, void *data)
{
struct bl_trig_notifier *n = container_of(p,
struct bl_trig_notifier, notifier);
struct led_classdev *led = n->led;
struct fb_event *fb_event = data;
int *blank = fb_event->data;
switch (event) {
case FB_EVENT_BLANK :
if (*blank && n->old_status == UNBLANK) {
n->brightness = led->brightness;
led_set_brightness(led, LED_OFF);
n->old_status = BLANK;
} else if (!*blank && n->old_status == BLANK) {
led_set_brightness(led, n->brightness);
n->old_status = UNBLANK;
}
case FB_EVENT_BLANK:
bl_blank(n, *blank);
break;
case FB_EVENT_FB_REGISTERED:
bl_blank(n, FB_BLANK_UNBLANK);
break;
case FB_EVENT_FB_UNREGISTERED:
bl_blank(n, FB_BLANK_NORMAL);
break;
}
@@ -67,7 +86,7 @@ static void bl_trig_activate(struct led_classdev *led)
n->led = led;
n->brightness = led->brightness;
n->old_status = UNBLANK;
n->old_status = FB_BLANK_UNBLANK;
n->notifier.notifier_call = fb_notifier_callback;
ret = fb_register_client(&n->notifier);