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[PATCH] Rewritten backlight infrastructure for portable Apple computers

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This patch contains a total rewrite of the backlight infrastructure for
portable Apple computers.  Backward compatibility is retained.  A sysfs
interface allows userland to control the brightness with more steps than
before.  Userland is allowed to upload a brightness curve for different
monitors, similar to Mac OS X.

[akpm@osdl.org: add needed exports]
Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Michael Hanselmann
2006-06-25 05:47:08 -07:00
committed by Linus Torvalds
parent 17660bdd5c
commit 5474c120aa
26 changed files with 1534 additions and 716 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/asm-powerpc/backlight.h
+15 -15
View File
@@ -2,30 +2,30 @@
* Routines for handling backlight control on PowerBooks
*
* For now, implementation resides in
* arch/powerpc/platforms/powermac/pmac_support.c
* arch/powerpc/platforms/powermac/backlight.c
*
*/
#ifndef __ASM_POWERPC_BACKLIGHT_H
#define __ASM_POWERPC_BACKLIGHT_H
#ifdef __KERNEL__
/* Abstract values */
#define BACKLIGHT_OFF 0
#define BACKLIGHT_MIN 1
#define BACKLIGHT_MAX 0xf
#include <linux/fb.h>
#include <linux/mutex.h>
struct backlight_controller {
int (*set_enable)(int enable, int level, void *data);
int (*set_level)(int level, void *data);
};
/* For locking instructions, see the implementation file */
extern struct backlight_device *pmac_backlight;
extern struct mutex pmac_backlight_mutex;
extern void register_backlight_controller(struct backlight_controller *ctrler, void *data, char *type);
extern void unregister_backlight_controller(struct backlight_controller *ctrler, void *data);
extern void pmac_backlight_calc_curve(struct fb_info*);
extern int pmac_backlight_curve_lookup(struct fb_info *info, int value);
extern int set_backlight_enable(int enable);
extern int get_backlight_enable(void);
extern int set_backlight_level(int level);
extern int get_backlight_level(void);
extern int pmac_has_backlight_type(const char *type);
extern void pmac_backlight_key_up(void);
extern void pmac_backlight_key_down(void);
extern int pmac_backlight_set_legacy_brightness(int brightness);
extern int pmac_backlight_get_legacy_brightness(void);
#endif /* __KERNEL__ */
#endif
include/linux/fb.h
+23
View File
@@ -1,6 +1,7 @@
#ifndef _LINUX_FB_H
#define _LINUX_FB_H
#include <linux/backlight.h>
#include <asm/types.h>
/* Definitions of frame buffers */
@@ -366,6 +367,12 @@ struct fb_cursor {
struct fb_image image; /* Cursor image */
};
#ifdef CONFIG_FB_BACKLIGHT
/* Settings for the generic backlight code */
#define FB_BACKLIGHT_LEVELS 128
#define FB_BACKLIGHT_MAX 0xFF
#endif
#ifdef __KERNEL__
#include <linux/fs.h>
@@ -756,6 +763,21 @@ struct fb_info {
struct fb_cmap cmap; /* Current cmap */
struct list_head modelist; /* mode list */
struct fb_videomode *mode; /* current mode */
#ifdef CONFIG_FB_BACKLIGHT
/* Lock ordering:
* bl_mutex (protects bl_dev and bl_curve)
* bl_dev->sem (backlight class)
*/
struct mutex bl_mutex;
/* assigned backlight device */
struct backlight_device *bl_dev;
/* Backlight level curve */
u8 bl_curve[FB_BACKLIGHT_LEVELS];
#endif
struct fb_ops *fbops;
struct device *device;
struct class_device *class_device; /* sysfs per device attrs */
@@ -895,6 +917,7 @@ extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
extern void framebuffer_release(struct fb_info *info);
extern int fb_init_class_device(struct fb_info *fb_info);
extern void fb_cleanup_class_device(struct fb_info *head);
extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
/* drivers/video/fbmon.c */
#define FB_MAXTIMINGS 0
include/linux/pmu.h
+4
View File
@@ -230,4 +230,8 @@ extern int pmu_battery_count;
extern struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
extern unsigned int pmu_power_flags;
/* Backlight */
extern int disable_kernel_backlight;
extern void pmu_backlight_init(struct device_node*);
#endif /* __KERNEL__ */