Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Michael Hanselmann |
115 |
47.72% |
1 |
5.88% |
| Thomas Zimmermann |
80 |
33.20% |
3 |
17.65% |
| Linus Torvalds (pre-git) |
11 |
4.56% |
3 |
17.65% |
| Jon Smirl |
7 |
2.90% |
1 |
5.88% |
| James Simmons |
6 |
2.49% |
2 |
11.76% |
| Richard Purdie |
6 |
2.49% |
1 |
5.88% |
| Rob Clark |
5 |
2.07% |
1 |
5.88% |
| Thierry Reding |
4 |
1.66% |
1 |
5.88% |
| Antonino A. Daplas |
3 |
1.24% |
1 |
5.88% |
| Daniel Vetter |
2 |
0.83% |
1 |
5.88% |
| Thomas Gleixner |
1 |
0.41% |
1 |
5.88% |
| Benjamin Herrenschmidt |
1 |
0.41% |
1 |
5.88% |
| Total |
241 |
|
17 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/backlight.h>
#include <linux/export.h>
#include <linux/fb.h>
#include <linux/mutex.h>
#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
/*
* This function generates a linear backlight curve
*
* 0: off
* 1-7: min
* 8-127: linear from min to max
*/
void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max)
{
unsigned int i, flat, count, range = (max - min);
mutex_lock(&fb_info->bl_curve_mutex);
fb_info->bl_curve[0] = off;
for (flat = 1; flat < (FB_BACKLIGHT_LEVELS / 16); ++flat)
fb_info->bl_curve[flat] = min;
count = FB_BACKLIGHT_LEVELS * 15 / 16;
for (i = 0; i < count; ++i)
fb_info->bl_curve[flat + i] = min + (range * (i + 1) / count);
mutex_unlock(&fb_info->bl_curve_mutex);
}
EXPORT_SYMBOL_GPL(fb_bl_default_curve);
struct backlight_device *fb_bl_device(struct fb_info *info)
{
return info->bl_dev;
}
EXPORT_SYMBOL(fb_bl_device);
void fb_bl_notify_blank(struct fb_info *info, int old_blank)
{
bool on = info->blank == FB_BLANK_UNBLANK;
bool prev_on = old_blank == FB_BLANK_UNBLANK;
if (info->bl_dev)
backlight_notify_blank(info->bl_dev, info->device, on, prev_on);
else
backlight_notify_blank_all(info->device, on, prev_on);
}
#endif