diff options
author | Michael Hanselmann <linux-kernel@hansmi.ch> | 2006-06-25 05:47:08 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-25 10:00:59 -0700 |
commit | 5474c120aafe78ca54bf272f7a01107c42da2b21 (patch) | |
tree | c1b002a27703ce92c816bfb9844752186e33d403 /drivers/video/aty/atyfb_base.c | |
parent | 17660bdd5c1f1a165273c1a59cb5b87670a81cc4 (diff) |
[PATCH] Rewritten backlight infrastructure for portable Apple computers
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>
Diffstat (limited to 'drivers/video/aty/atyfb_base.c')
-rw-r--r-- | drivers/video/aty/atyfb_base.c | 178 |
1 files changed, 151 insertions, 27 deletions
diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c index c054bb28b1c..c5185f7cf4b 100644 --- a/drivers/video/aty/atyfb_base.c +++ b/drivers/video/aty/atyfb_base.c @@ -66,6 +66,7 @@ #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/wait.h> +#include <linux/backlight.h> #include <asm/io.h> #include <asm/uaccess.h> @@ -2115,45 +2116,142 @@ static int atyfb_pci_resume(struct pci_dev *pdev) #endif /* defined(CONFIG_PM) && defined(CONFIG_PCI) */ -#ifdef CONFIG_PMAC_BACKLIGHT +/* Backlight */ +#ifdef CONFIG_FB_ATY_BACKLIGHT +#define MAX_LEVEL 0xFF - /* - * LCD backlight control - */ +static struct backlight_properties aty_bl_data; -static int backlight_conv[] = { - 0x00, 0x3f, 0x4c, 0x59, 0x66, 0x73, 0x80, 0x8d, - 0x9a, 0xa7, 0xb4, 0xc1, 0xcf, 0xdc, 0xe9, 0xff -}; +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 */ + mutex_lock(&info->bl_mutex); + atylevel = info->bl_curve[level] * FB_BACKLIGHT_MAX / MAX_LEVEL; + mutex_unlock(&info->bl_mutex); + + if (atylevel < 0) + atylevel = 0; + else if (atylevel > MAX_LEVEL) + atylevel = MAX_LEVEL; -static int aty_set_backlight_enable(int on, int level, void *data) + return atylevel; +} + +static int aty_bl_update_status(struct backlight_device *bd) { - struct fb_info *info = (struct fb_info *) data; - struct atyfb_par *par = (struct atyfb_par *) info->par; + struct atyfb_par *par = class_get_devdata(&bd->class_dev); unsigned int reg = aty_ld_lcd(LCD_MISC_CNTL, par); + int level; + + if (bd->props->power != FB_BLANK_UNBLANK || + bd->props->fb_blank != FB_BLANK_UNBLANK) + level = 0; + else + level = bd->props->brightness; reg |= (BLMOD_EN | BIASMOD_EN); - if (on && level > BACKLIGHT_OFF) { + if (level > 0) { reg &= ~BIAS_MOD_LEVEL_MASK; - reg |= (backlight_conv[level] << BIAS_MOD_LEVEL_SHIFT); + reg |= (aty_bl_get_level_brightness(par, level) << BIAS_MOD_LEVEL_SHIFT); } else { reg &= ~BIAS_MOD_LEVEL_MASK; - reg |= (backlight_conv[0] << BIAS_MOD_LEVEL_SHIFT); + reg |= (aty_bl_get_level_brightness(par, 0) << BIAS_MOD_LEVEL_SHIFT); } aty_st_lcd(LCD_MISC_CNTL, reg, par); + return 0; } -static int aty_set_backlight_level(int level, void *data) +static int aty_bl_get_brightness(struct backlight_device *bd) { - return aty_set_backlight_enable(1, level, data); + return bd->props->brightness; } -static struct backlight_controller aty_backlight_controller = { - aty_set_backlight_enable, - aty_set_backlight_level +static struct backlight_properties aty_bl_data = { + .owner = THIS_MODULE, + .get_brightness = aty_bl_get_brightness, + .update_status = aty_bl_update_status, + .max_brightness = (FB_BACKLIGHT_LEVELS - 1), }; -#endif /* CONFIG_PMAC_BACKLIGHT */ + +static void aty_bl_init(struct atyfb_par *par) +{ + struct fb_info *info = pci_get_drvdata(par->pdev); + struct backlight_device *bd; + char name[12]; + +#ifdef CONFIG_PMAC_BACKLIGHT + if (!pmac_has_backlight_type("ati")) + return; +#endif + + snprintf(name, sizeof(name), "atybl%d", info->node); + + bd = backlight_device_register(name, par, &aty_bl_data); + if (IS_ERR(bd)) { + info->bl_dev = NULL; + printk("aty: Backlight registration failed\n"); + 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); + + up(&bd->sem); + bd->props->brightness = aty_bl_data.max_brightness; + bd->props->power = FB_BLANK_UNBLANK; + bd->props->update_status(bd); + down(&bd->sem); + +#ifdef CONFIG_PMAC_BACKLIGHT + mutex_lock(&pmac_backlight_mutex); + if (!pmac_backlight) + pmac_backlight = bd; + mutex_unlock(&pmac_backlight_mutex); +#endif + + printk("aty: Backlight initialized (%s)\n", name); + + return; + +error: + return; +} + +static void aty_bl_exit(struct atyfb_par *par) +{ + struct fb_info *info = pci_get_drvdata(par->pdev); + +#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) + pmac_backlight = NULL; +#endif + + backlight_device_unregister(info->bl_dev); + + 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 */ static void __init aty_calc_mem_refresh(struct atyfb_par *par, int xclk) { @@ -2513,9 +2611,13 @@ static int __init aty_init(struct fb_info *info, const char *name) /* these bits let the 101 powerbook wake up from sleep -- paulus */ aty_st_lcd(POWER_MANAGEMENT, aty_ld_lcd(POWER_MANAGEMENT, par) | (USE_F32KHZ | TRISTATE_MEM_EN), par); - } else if (M64_HAS(MOBIL_BUS)) - register_backlight_controller(&aty_backlight_controller, info, "ati"); -#endif /* CONFIG_PMAC_BACKLIGHT */ + } else +#endif + if (M64_HAS(MOBIL_BUS)) { +#ifdef CONFIG_FB_ATY_BACKLIGHT + aty_bl_init (par); +#endif + } memset(&var, 0, sizeof(var)); #ifdef CONFIG_PPC @@ -2674,8 +2776,16 @@ static int atyfb_blank(int blank, struct fb_info *info) return 0; #ifdef CONFIG_PMAC_BACKLIGHT - if (machine_is(powermac) && blank > FB_BLANK_NORMAL) - set_backlight_enable(0); + if (machine_is(powermac) && blank > FB_BLANK_NORMAL) { + mutex_lock(&info->bl_mutex); + if (info->bl_dev) { + down(&info->bl_dev->sem); + info->bl_dev->props->power = FB_BLANK_POWERDOWN; + info->bl_dev->props->update_status(info->bl_dev); + up(&info->bl_dev->sem); + } + mutex_unlock(&info->bl_mutex); + } #elif defined(CONFIG_FB_ATY_GENERIC_LCD) if (par->lcd_table && blank > FB_BLANK_NORMAL && (aty_ld_lcd(LCD_GEN_CNTL, par) & LCD_ON)) { @@ -2706,8 +2816,16 @@ static int atyfb_blank(int blank, struct fb_info *info) aty_st_le32(CRTC_GEN_CNTL, gen_cntl, par); #ifdef CONFIG_PMAC_BACKLIGHT - if (machine_is(powermac) && blank <= FB_BLANK_NORMAL) - set_backlight_enable(1); + if (machine_is(powermac) && blank <= FB_BLANK_NORMAL) { + mutex_lock(&info->bl_mutex); + if (info->bl_dev) { + down(&info->bl_dev->sem); + info->bl_dev->props->power = FB_BLANK_UNBLANK; + info->bl_dev->props->update_status(info->bl_dev); + up(&info->bl_dev->sem); + } + mutex_unlock(&info->bl_mutex); + } #elif defined(CONFIG_FB_ATY_GENERIC_LCD) if (par->lcd_table && blank <= FB_BLANK_NORMAL && (aty_ld_lcd(LCD_GEN_CNTL, par) & LCD_ON)) { @@ -3440,6 +3558,7 @@ static int __devinit atyfb_pci_probe(struct pci_dev *pdev, const struct pci_devi par->res_start = res_start; par->res_size = res_size; par->irq = pdev->irq; + par->pdev = pdev; /* Setup "info" structure */ #ifdef __sparc__ @@ -3571,6 +3690,11 @@ static void __devexit atyfb_remove(struct fb_info *info) aty_set_crtc(par, &saved_crtc); par->pll_ops->set_pll(info, &saved_pll); +#ifdef CONFIG_FB_ATY_BACKLIGHT + if (M64_HAS(MOBIL_BUS)) + aty_bl_exit(par); +#endif + unregister_framebuffer(info); #ifdef CONFIG_MTRR |