diff options
author | Richard Purdie <rpurdie@rpsys.net> | 2007-02-10 14:10:33 (GMT) |
---|---|---|
committer | Richard Purdie <rpurdie@rpsys.net> | 2007-02-20 08:38:46 (GMT) |
commit | 37ce69a57ff217a4ca0871e9ee5aa58c052b7d86 (patch) | |
tree | 21cdbb8c988eed585437bb502ca15c2998ea7fbc /drivers/video/aty/atyfb_base.c | |
parent | b5c6916b3118d4301dc2f8cf8d33f13e5324a3a5 (diff) | |
download | linux-fsl-qoriq-37ce69a57ff217a4ca0871e9ee5aa58c052b7d86.tar.xz |
backlight: Rework backlight/fb interaction simplifying, lots
fb_info->bl_mutex is badly thought out and the backlight class doesn't
need it if the framebuffer/backlight register/unregister order is
consistent, particularly after the backlight locking fixes.
Fix the drivers to use the order:
backlight_device_register()
register_framebuffer()
unregister_framebuffer()
backlight_device_unregister()
and turn bl_mutex into a lock for the bl_curve data only.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Diffstat (limited to 'drivers/video/aty/atyfb_base.c')
-rw-r--r-- | drivers/video/aty/atyfb_base.c | 49 |
1 files changed, 11 insertions, 38 deletions
diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c index 3b65293..6646228 100644 --- a/drivers/video/aty/atyfb_base.c +++ b/drivers/video/aty/atyfb_base.c @@ -2116,13 +2116,13 @@ static int atyfb_pci_resume(struct pci_dev *pdev) static struct backlight_properties aty_bl_data; -/* Call with fb_info->bl_mutex held */ static int aty_bl_get_level_brightness(struct atyfb_par *par, int level) { struct fb_info *info = pci_get_drvdata(par->pdev); int atylevel; /* Get and convert the value */ + /* No locking of bl_curve since we read a single value */ atylevel = info->bl_curve[level] * FB_BACKLIGHT_MAX / MAX_LEVEL; if (atylevel < 0) @@ -2133,8 +2133,7 @@ static int aty_bl_get_level_brightness(struct atyfb_par *par, int level) return atylevel; } -/* Call with fb_info->bl_mutex held */ -static int __aty_bl_update_status(struct backlight_device *bd) +static int aty_bl_update_status(struct backlight_device *bd) { struct atyfb_par *par = class_get_devdata(&bd->class_dev); unsigned int reg = aty_ld_lcd(LCD_MISC_CNTL, par); @@ -2159,19 +2158,6 @@ static int __aty_bl_update_status(struct backlight_device *bd) return 0; } -static int aty_bl_update_status(struct backlight_device *bd) -{ - struct atyfb_par *par = class_get_devdata(&bd->class_dev); - struct fb_info *info = pci_get_drvdata(par->pdev); - int ret; - - mutex_lock(&info->bl_mutex); - ret = __aty_bl_update_status(bd); - mutex_unlock(&info->bl_mutex); - - return ret; -} - static int aty_bl_get_brightness(struct backlight_device *bd) { return bd->props->brightness; @@ -2203,12 +2189,10 @@ static void aty_bl_init(struct atyfb_par *par) goto error; } - mutex_lock(&info->bl_mutex); info->bl_dev = bd; fb_bl_default_curve(info, 0, 0x3F * FB_BACKLIGHT_MAX / MAX_LEVEL, 0xFF * FB_BACKLIGHT_MAX / MAX_LEVEL); - mutex_unlock(&info->bl_mutex); bd->props->brightness = aty_bl_data.max_brightness; bd->props->power = FB_BLANK_UNBLANK; @@ -2229,30 +2213,19 @@ error: return; } -static void aty_bl_exit(struct atyfb_par *par) +static void aty_bl_exit(struct backlight_device *bd) { - struct fb_info *info = pci_get_drvdata(par->pdev); - + if (bd) { #ifdef CONFIG_PMAC_BACKLIGHT - mutex_lock(&pmac_backlight_mutex); -#endif - - mutex_lock(&info->bl_mutex); - if (info->bl_dev) { -#ifdef CONFIG_PMAC_BACKLIGHT - if (pmac_backlight == info->bl_dev) + mutex_lock(&pmac_backlight_mutex); + if (pmac_backlight == bd) pmac_backlight = NULL; + mutex_unlock(&pmac_backlight_mutex); #endif - - backlight_device_unregister(info->bl_dev); + backlight_device_unregister(bd); printk("aty: Backlight unloaded\n"); } - mutex_unlock(&info->bl_mutex); - -#ifdef CONFIG_PMAC_BACKLIGHT - mutex_unlock(&pmac_backlight_mutex); -#endif } #endif /* CONFIG_FB_ATY_BACKLIGHT */ @@ -3705,13 +3678,13 @@ static void __devexit atyfb_remove(struct fb_info *info) aty_set_crtc(par, &saved_crtc); par->pll_ops->set_pll(info, &saved_pll); + unregister_framebuffer(info); + #ifdef CONFIG_FB_ATY_BACKLIGHT if (M64_HAS(MOBIL_BUS)) - aty_bl_exit(par); + aty_bl_exit(info->bl_dev); #endif - unregister_framebuffer(info); - #ifdef CONFIG_MTRR if (par->mtrr_reg >= 0) { mtrr_del(par->mtrr_reg, 0, 0); |