#include <linux/delay.h>
#include <linux/kprobes.h>
#include <linux/kexec.h>
+#include <linux/backlight.h>
#include <asm/kdebug.h>
#include <asm/pgtable.h>
spin_lock_irq(&die_lock);
bust_spinlocks(1);
#ifdef CONFIG_PMAC_BACKLIGHT
- if (machine_is(powermac)) {
- set_backlight_enable(1);
- set_backlight_level(BACKLIGHT_MAX);
+ mutex_lock(&pmac_backlight_mutex);
+ if (machine_is(powermac) && pmac_backlight) {
+ struct backlight_properties *props;
+
+ down(&pmac_backlight->sem);
+ props = pmac_backlight->props;
+ props->brightness = props->max_brightness;
+ props->power = FB_BLANK_UNBLANK;
+ props->update_status(pmac_backlight);
+ up(&pmac_backlight->sem);
}
+ mutex_unlock(&pmac_backlight_mutex);
#endif
printk("Oops: %s, sig: %ld [#%d]\n", str, err, ++die_counter);
#ifdef CONFIG_PREEMPT
* Contains support for the backlight.
*
* Copyright (C) 2000 Benjamin Herrenschmidt
+ * Copyright (C) 2006 Michael Hanselmann <linux-kernel@hansmi.ch>
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/stddef.h>
-#include <linux/reboot.h>
-#include <linux/nvram.h>
-#include <linux/console.h>
-#include <asm/sections.h>
-#include <asm/ptrace.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
#include <asm/prom.h>
-#include <asm/machdep.h>
-#include <asm/nvram.h>
#include <asm/backlight.h>
-#include <linux/adb.h>
-#include <linux/pmu.h>
+#define OLD_BACKLIGHT_MAX 15
-static struct backlight_controller *backlighter;
-static void* backlighter_data;
-static int backlight_autosave;
-static int backlight_level = BACKLIGHT_MAX;
-static int backlight_enabled = 1;
-static int backlight_req_level = -1;
-static int backlight_req_enable = -1;
+/* Protect the pmac_backlight variable */
+DEFINE_MUTEX(pmac_backlight_mutex);
-static void backlight_callback(void *);
-static DECLARE_WORK(backlight_work, backlight_callback, NULL);
+/* Main backlight storage
+ *
+ * Backlight drivers in this variable are required to have the "props"
+ * attribute set and to have an update_status function.
+ *
+ * We can only store one backlight here, but since Apple laptops have only one
+ * internal display, it doesn't matter. Other backlight drivers can be used
+ * independently.
+ *
+ * Lock ordering:
+ * pmac_backlight_mutex (global, main backlight)
+ * pmac_backlight->sem (backlight class)
+ */
+struct backlight_device *pmac_backlight;
-void register_backlight_controller(struct backlight_controller *ctrler,
- void *data, char *type)
+int pmac_has_backlight_type(const char *type)
{
- struct device_node* bk_node;
- char *prop;
- int valid = 0;
-
- /* There's already a matching controller, bail out */
- if (backlighter != NULL)
- return;
-
- bk_node = find_devices("backlight");
-
-#ifdef CONFIG_ADB_PMU
- /* Special case for the old PowerBook since I can't test on it */
- backlight_autosave = machine_is_compatible("AAPL,3400/2400")
- || machine_is_compatible("AAPL,3500");
- if ((backlight_autosave
- || machine_is_compatible("AAPL,PowerBook1998")
- || machine_is_compatible("PowerBook1,1"))
- && !strcmp(type, "pmu"))
- valid = 1;
-#endif
+ struct device_node* bk_node = find_devices("backlight");
+
if (bk_node) {
- prop = get_property(bk_node, "backlight-control", NULL);
- if (prop && !strncmp(prop, type, strlen(type)))
- valid = 1;
- }
- if (!valid)
- return;
- backlighter = ctrler;
- backlighter_data = data;
-
- if (bk_node && !backlight_autosave)
- prop = get_property(bk_node, "bklt", NULL);
- else
- prop = NULL;
- if (prop) {
- backlight_level = ((*prop)+1) >> 1;
- if (backlight_level > BACKLIGHT_MAX)
- backlight_level = BACKLIGHT_MAX;
+ char *prop = get_property(bk_node, "backlight-control", NULL);
+ if (prop && strncmp(prop, type, strlen(type)) == 0)
+ return 1;
}
-#ifdef CONFIG_ADB_PMU
- if (backlight_autosave) {
- struct adb_request req;
- pmu_request(&req, NULL, 2, 0xd9, 0);
- while (!req.complete)
- pmu_poll();
- backlight_level = req.reply[0] >> 4;
- }
-#endif
- acquire_console_sem();
- if (!backlighter->set_enable(1, backlight_level, data))
- backlight_enabled = 1;
- release_console_sem();
-
- printk(KERN_INFO "Registered \"%s\" backlight controller,"
- "level: %d/15\n", type, backlight_level);
+ return 0;
}
-EXPORT_SYMBOL(register_backlight_controller);
-void unregister_backlight_controller(struct backlight_controller
- *ctrler, void *data)
+int pmac_backlight_curve_lookup(struct fb_info *info, int value)
{
- /* We keep the current backlight level (for now) */
- if (ctrler == backlighter && data == backlighter_data)
- backlighter = NULL;
+ int level = (FB_BACKLIGHT_LEVELS - 1);
+
+ if (info && info->bl_dev) {
+ int i, max = 0;
+
+ /* Look for biggest value */
+ for (i = 0; i < FB_BACKLIGHT_LEVELS; i++)
+ max = max((int)info->bl_curve[i], max);
+
+ /* Look for nearest value */
+ for (i = 0; i < FB_BACKLIGHT_LEVELS; i++) {
+ int diff = abs(info->bl_curve[i] - value);
+ if (diff < max) {
+ max = diff;
+ level = i;
+ }
+ }
+
+ }
+
+ return level;
}
-EXPORT_SYMBOL(unregister_backlight_controller);
-static int __set_backlight_enable(int enable)
+static void pmac_backlight_key(int direction)
{
- int rc;
-
- if (!backlighter)
- return -ENODEV;
- acquire_console_sem();
- rc = backlighter->set_enable(enable, backlight_level,
- backlighter_data);
- if (!rc)
- backlight_enabled = enable;
- release_console_sem();
- return rc;
+ mutex_lock(&pmac_backlight_mutex);
+ if (pmac_backlight) {
+ struct backlight_properties *props;
+ int brightness;
+
+ down(&pmac_backlight->sem);
+ props = pmac_backlight->props;
+
+ brightness = props->brightness +
+ ((direction?-1:1) * (props->max_brightness / 15));
+
+ if (brightness < 0)
+ brightness = 0;
+ else if (brightness > props->max_brightness)
+ brightness = props->max_brightness;
+
+ props->brightness = brightness;
+ props->update_status(pmac_backlight);
+
+ up(&pmac_backlight->sem);
+ }
+ mutex_unlock(&pmac_backlight_mutex);
}
-int set_backlight_enable(int enable)
+
+void pmac_backlight_key_up()
{
- if (!backlighter)
- return -ENODEV;
- backlight_req_enable = enable;
- schedule_work(&backlight_work);
- return 0;
+ pmac_backlight_key(0);
}
-EXPORT_SYMBOL(set_backlight_enable);
-
-int get_backlight_enable(void)
+void pmac_backlight_key_down()
{
- if (!backlighter)
- return -ENODEV;
- return backlight_enabled;
+ pmac_backlight_key(1);
}
-EXPORT_SYMBOL(get_backlight_enable);
-static int __set_backlight_level(int level)
+int pmac_backlight_set_legacy_brightness(int brightness)
{
- int rc = 0;
-
- if (!backlighter)
- return -ENODEV;
- if (level < BACKLIGHT_MIN)
- level = BACKLIGHT_OFF;
- if (level > BACKLIGHT_MAX)
- level = BACKLIGHT_MAX;
- acquire_console_sem();
- if (backlight_enabled)
- rc = backlighter->set_level(level, backlighter_data);
- if (!rc)
- backlight_level = level;
- release_console_sem();
- if (!rc && !backlight_autosave) {
- level <<=1;
- if (level & 0x10)
- level |= 0x01;
- // -- todo: save to property "bklt"
+ int error = -ENXIO;
+
+ mutex_lock(&pmac_backlight_mutex);
+ if (pmac_backlight) {
+ struct backlight_properties *props;
+
+ down(&pmac_backlight->sem);
+ props = pmac_backlight->props;
+ props->brightness = brightness *
+ props->max_brightness / OLD_BACKLIGHT_MAX;
+ props->update_status(pmac_backlight);
+ up(&pmac_backlight->sem);
+
+ error = 0;
}
- return rc;
+ mutex_unlock(&pmac_backlight_mutex);
+
+ return error;
}
-int set_backlight_level(int level)
+
+int pmac_backlight_get_legacy_brightness()
{
- if (!backlighter)
- return -ENODEV;
- backlight_req_level = level;
- schedule_work(&backlight_work);
- return 0;
-}
+ int result = -ENXIO;
-EXPORT_SYMBOL(set_backlight_level);
+ mutex_lock(&pmac_backlight_mutex);
+ if (pmac_backlight) {
+ struct backlight_properties *props;
-int get_backlight_level(void)
-{
- if (!backlighter)
- return -ENODEV;
- return backlight_level;
-}
-EXPORT_SYMBOL(get_backlight_level);
+ down(&pmac_backlight->sem);
+ props = pmac_backlight->props;
+ result = props->brightness *
+ OLD_BACKLIGHT_MAX / props->max_brightness;
+ up(&pmac_backlight->sem);
+ }
+ mutex_unlock(&pmac_backlight_mutex);
-static void backlight_callback(void *dummy)
-{
- int level, enable;
-
- do {
- level = backlight_req_level;
- enable = backlight_req_enable;
- mb();
-
- if (level >= 0)
- __set_backlight_level(level);
- if (enable >= 0)
- __set_backlight_enable(enable);
- } while(cmpxchg(&backlight_req_level, level, -1) != level ||
- cmpxchg(&backlight_req_enable, enable, -1) != enable);
+ return result;
}
#include <asm/prom.h>
#include <asm/machdep.h>
#include <asm/xmon.h>
-#ifdef CONFIG_PMAC_BACKLIGHT
-#include <asm/backlight.h>
-#endif
#include <asm/processor.h>
#include <asm/pgtable.h>
#include <asm/mmu.h>
devices are not fully supported in the bay as I never had one to
try with
-# made a separate option since backlight may end up beeing used
-# on non-powerbook machines (but only on PMU based ones AFAIK)
config PMAC_BACKLIGHT
bool "Backlight control for LCD screens"
depends on ADB_PMU && (BROKEN || !PPC64)
help
- Say Y here to build in code to manage the LCD backlight on a
- Macintosh PowerBook. With this code, the backlight will be turned
- on and off appropriately on power-management and lid-open/lid-closed
- events; also, the PowerBook button device will be enabled so you can
- change the screen brightness.
+ Say Y here to enable Macintosh specific extensions of the generic
+ backlight code. With this enabled, the brightness keys on older
+ PowerBooks will be enabled so you can change the screen brightness.
+ Newer models should use an userspace daemon like pbbuttonsd.
+
+config PMAC_BACKLIGHT_LEGACY
+ bool "Provide legacy ioctl's on /dev/pmu for the backlight"
+ depends on PMAC_BACKLIGHT && (BROKEN || !PPC64)
+ help
+ Say Y if you want to enable legacy ioctl's on /dev/pmu. This is for
+ programs which use this old interface. New and updated programs
+ should use the backlight classes in sysfs.
config ADB_MACIO
bool "Include MacIO (CHRP) ADB driver"
obj-$(CONFIG_ANSLCD) += ans-lcd.o
obj-$(CONFIG_ADB_PMU) += via-pmu.o
+obj-$(CONFIG_PMAC_BACKLIGHT) += via-pmu-backlight.o
obj-$(CONFIG_ADB_CUDA) += via-cuda.o
obj-$(CONFIG_PMAC_APM_EMU) += apm_emu.o
obj-$(CONFIG_PMAC_SMU) += smu.o
case 0x1f: /* Powerbook button device */
{
int down = (data[1] == (data[1] & 0xf));
-#ifdef CONFIG_PMAC_BACKLIGHT
- int backlight = get_backlight_level();
-#endif
+
/*
* XXX: Where is the contrast control for the passive?
* -- Cort
case 0xa: /* brightness decrease */
#ifdef CONFIG_PMAC_BACKLIGHT
- if (!disable_kernel_backlight) {
- if (down && backlight >= 0) {
- if (backlight > BACKLIGHT_OFF)
- set_backlight_level(backlight-1);
- else
- set_backlight_level(BACKLIGHT_OFF);
- }
- }
-#endif /* CONFIG_PMAC_BACKLIGHT */
+ if (!disable_kernel_backlight && down)
+ pmac_backlight_key_down();
+#endif
input_report_key(adbhid[id]->input, KEY_BRIGHTNESSDOWN, down);
break;
case 0x9: /* brightness increase */
#ifdef CONFIG_PMAC_BACKLIGHT
- if (!disable_kernel_backlight) {
- if (down && backlight >= 0) {
- if (backlight < BACKLIGHT_MAX)
- set_backlight_level(backlight+1);
- else
- set_backlight_level(BACKLIGHT_MAX);
- }
- }
-#endif /* CONFIG_PMAC_BACKLIGHT */
+ if (!disable_kernel_backlight && down)
+ pmac_backlight_key_up();
+#endif
input_report_key(adbhid[id]->input, KEY_BRIGHTNESSUP, down);
break;
--- /dev/null
+/*
+ * Backlight code for via-pmu
+ *
+ * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
+ * Copyright (C) 2001-2002 Benjamin Herrenschmidt
+ * Copyright (C) 2006 Michael Hanselmann <linux-kernel@hansmi.ch>
+ *
+ */
+
+#include <asm/ptrace.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+#include <asm/backlight.h>
+#include <asm/prom.h>
+
+#define MAX_PMU_LEVEL 0xFF
+
+static struct device_node *vias;
+static struct backlight_properties pmu_backlight_data;
+
+static int pmu_backlight_get_level_brightness(struct fb_info *info,
+ int level)
+{
+ int pmulevel;
+
+ /* Get and convert the value */
+ mutex_lock(&info->bl_mutex);
+ pmulevel = info->bl_curve[level] * FB_BACKLIGHT_MAX / MAX_PMU_LEVEL;
+ mutex_unlock(&info->bl_mutex);
+
+ if (pmulevel < 0)
+ pmulevel = 0;
+ else if (pmulevel > MAX_PMU_LEVEL)
+ pmulevel = MAX_PMU_LEVEL;
+
+ return pmulevel;
+}
+
+static int pmu_backlight_update_status(struct backlight_device *bd)
+{
+ struct fb_info *info = class_get_devdata(&bd->class_dev);
+ struct adb_request req;
+ int pmulevel, level = bd->props->brightness;
+
+ if (vias == NULL)
+ return -ENODEV;
+
+ if (bd->props->power != FB_BLANK_UNBLANK ||
+ bd->props->fb_blank != FB_BLANK_UNBLANK)
+ level = 0;
+
+ pmulevel = pmu_backlight_get_level_brightness(info, level);
+
+ pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT, pmulevel);
+ pmu_wait_complete(&req);
+
+ pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
+ PMU_POW_BACKLIGHT | (level > 0 ? PMU_POW_ON : PMU_POW_OFF));
+ pmu_wait_complete(&req);
+
+ return 0;
+}
+
+static int pmu_backlight_get_brightness(struct backlight_device *bd)
+{
+ return bd->props->brightness;
+}
+
+static struct backlight_properties pmu_backlight_data = {
+ .owner = THIS_MODULE,
+ .get_brightness = pmu_backlight_get_brightness,
+ .update_status = pmu_backlight_update_status,
+ .max_brightness = (FB_BACKLIGHT_LEVELS - 1),
+};
+
+void __init pmu_backlight_init(struct device_node *in_vias)
+{
+ struct backlight_device *bd;
+ struct fb_info *info;
+ char name[10];
+ int level, autosave;
+
+ vias = in_vias;
+
+ /* Special case for the old PowerBook since I can't test on it */
+ autosave =
+ machine_is_compatible("AAPL,3400/2400") ||
+ machine_is_compatible("AAPL,3500");
+
+ if (!autosave &&
+ !pmac_has_backlight_type("pmu") &&
+ !machine_is_compatible("AAPL,PowerBook1998") &&
+ !machine_is_compatible("PowerBook1,1"))
+ return;
+
+ /* Actually, this is a hack, but I don't know of a better way
+ * to get the first framebuffer device.
+ */
+ info = registered_fb[0];
+ if (!info) {
+ printk("pmubl: No framebuffer found\n");
+ goto error;
+ }
+
+ snprintf(name, sizeof(name), "pmubl%d", info->node);
+
+ bd = backlight_device_register(name, info, &pmu_backlight_data);
+ if (IS_ERR(bd)) {
+ printk("pmubl: Backlight registration failed\n");
+ goto error;
+ }
+
+ mutex_lock(&info->bl_mutex);
+ info->bl_dev = bd;
+ fb_bl_default_curve(info, 0x7F, 0x46, 0x0E);
+ mutex_unlock(&info->bl_mutex);
+
+ level = pmu_backlight_data.max_brightness;
+
+ if (autosave) {
+ /* read autosaved value if available */
+ struct adb_request req;
+ pmu_request(&req, NULL, 2, 0xd9, 0);
+ pmu_wait_complete(&req);
+
+ mutex_lock(&info->bl_mutex);
+ level = pmac_backlight_curve_lookup(info,
+ (req.reply[0] >> 4) *
+ pmu_backlight_data.max_brightness / 15);
+ mutex_unlock(&info->bl_mutex);
+ }
+
+ up(&bd->sem);
+ bd->props->brightness = level;
+ bd->props->power = FB_BLANK_UNBLANK;
+ bd->props->update_status(bd);
+ down(&bd->sem);
+
+ mutex_lock(&pmac_backlight_mutex);
+ if (!pmac_backlight)
+ pmac_backlight = bd;
+ mutex_unlock(&pmac_backlight_mutex);
+
+ printk("pmubl: Backlight initialized (%s)\n", name);
+
+ return;
+
+error:
+ return;
+}
static int data_len;
static volatile int adb_int_pending;
static volatile int disable_poll;
-static struct adb_request bright_req_1, bright_req_2;
static struct device_node *vias;
static int pmu_kind = PMU_UNKNOWN;
static int pmu_fully_inited = 0;
#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
static int option_lid_wakeup = 1;
#endif /* CONFIG_PM && CONFIG_PPC32 */
-#if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT)
+#if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
static int sleep_in_progress;
#endif
static unsigned long async_req_locks;
int count, int *eof, void *data);
static int proc_get_irqstats(char *page, char **start, off_t off,
int count, int *eof, void *data);
-#ifdef CONFIG_PMAC_BACKLIGHT
-static int pmu_set_backlight_level(int level, void* data);
-static int pmu_set_backlight_enable(int on, int level, void* data);
-#endif /* CONFIG_PMAC_BACKLIGHT */
static void pmu_pass_intr(unsigned char *data, int len);
static int proc_get_batt(char *page, char **start, off_t off,
int count, int *eof, void *data);
"Core99"
};
-#ifdef CONFIG_PMAC_BACKLIGHT
-static struct backlight_controller pmu_backlight_controller = {
- pmu_set_backlight_enable,
- pmu_set_backlight_level
-};
-#endif /* CONFIG_PMAC_BACKLIGHT */
-
int __init find_via_pmu(void)
{
u64 taddr;
if (vias == NULL)
return -ENODEV;
- bright_req_1.complete = 1;
- bright_req_2.complete = 1;
batt_req.complete = 1;
#ifndef CONFIG_PPC_MERGE
return -ENODEV;
#ifdef CONFIG_PMAC_BACKLIGHT
- /* Enable backlight */
- register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
-#endif /* CONFIG_PMAC_BACKLIGHT */
+ /* Initialize backlight */
+ pmu_backlight_init(vias);
+#endif
#ifdef CONFIG_PPC32
if (machine_is_compatible("AAPL,3400/2400") ||
#ifdef CONFIG_INPUT_ADBHID
if (!disable_kernel_backlight)
#endif /* CONFIG_INPUT_ADBHID */
- set_backlight_level(data[1] >> 4);
+ pmac_backlight_set_legacy_brightness(data[1] >> 4);
#endif /* CONFIG_PMAC_BACKLIGHT */
}
/* Tick interrupt */
return IRQ_NONE;
}
-#ifdef CONFIG_PMAC_BACKLIGHT
-static int backlight_to_bright[] = {
- 0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
- 0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
-};
-
-static int
-pmu_set_backlight_enable(int on, int level, void* data)
-{
- struct adb_request req;
-
- if (vias == NULL)
- return -ENODEV;
-
- if (on) {
- pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
- backlight_to_bright[level]);
- pmu_wait_complete(&req);
- }
- pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
- PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
- pmu_wait_complete(&req);
-
- return 0;
-}
-
-static void
-pmu_bright_complete(struct adb_request *req)
-{
- if (req == &bright_req_1)
- clear_bit(1, &async_req_locks);
- if (req == &bright_req_2)
- clear_bit(2, &async_req_locks);
-}
-
-static int
-pmu_set_backlight_level(int level, void* data)
-{
- if (vias == NULL)
- return -ENODEV;
-
- if (test_and_set_bit(1, &async_req_locks))
- return -EAGAIN;
- pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT,
- backlight_to_bright[level]);
- if (test_and_set_bit(2, &async_req_locks))
- return -EAGAIN;
- pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL,
- PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ?
- PMU_POW_ON : PMU_POW_OFF));
-
- return 0;
-}
-#endif /* CONFIG_PMAC_BACKLIGHT */
-
void
pmu_enable_irled(int on)
{
return -EBUSY;
}
- /* Wait for completion of async backlight requests */
- while (!bright_req_1.complete || !bright_req_2.complete ||
- !batt_req.complete)
+ /* Wait for completion of async requests */
+ while (!batt_req.complete)
pmu_poll();
/* Giveup the lazy FPU & vec so we don't have to back them
return put_user(1, argp);
#endif /* CONFIG_PM && CONFIG_PPC32 */
-#ifdef CONFIG_PMAC_BACKLIGHT
- /* Backlight should have its own device or go via
- * the fbdev
- */
+#ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
+ /* Compatibility ioctl's for backlight */
case PMU_IOC_GET_BACKLIGHT:
+ {
+ int brightness;
+
if (sleep_in_progress)
return -EBUSY;
- error = get_backlight_level();
- if (error < 0)
- return error;
- return put_user(error, argp);
+
+ brightness = pmac_backlight_get_legacy_brightness();
+ if (brightness < 0)
+ return brightness;
+ else
+ return put_user(brightness, argp);
+
+ }
case PMU_IOC_SET_BACKLIGHT:
{
- __u32 value;
+ int brightness;
+
if (sleep_in_progress)
return -EBUSY;
- error = get_user(value, argp);
- if (!error)
- error = set_backlight_level(value);
- break;
+
+ error = get_user(brightness, argp);
+ if (error)
+ return error;
+
+ return pmac_backlight_set_legacy_brightness(brightness);
}
#ifdef CONFIG_INPUT_ADBHID
case PMU_IOC_GRAB_BACKLIGHT: {
return 0;
}
#endif /* CONFIG_INPUT_ADBHID */
-#endif /* CONFIG_PMAC_BACKLIGHT */
+#endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
case PMU_IOC_GET_MODEL:
return put_user(pmu_kind, argp);
case PMU_IOC_HAS_ADB:
combination with certain motherboards and monitors are known to
suffer from this problem.
+config FB_BACKLIGHT
+ bool
+ depends on FB
+ default n
+
config FB_MODE_HELPERS
bool "Enable Video Mode Handling Helpers"
depends on FB
independently validate video mode parameters, you should say Y
here.
+config FB_NVIDIA_BACKLIGHT
+ bool "Support for backlight control"
+ depends on FB_NVIDIA && PPC_PMAC
+ select FB_BACKLIGHT
+ select BACKLIGHT_LCD_SUPPORT
+ select BACKLIGHT_CLASS_DEVICE
+ default y
+ help
+ Say Y here if you want to control the backlight of your display.
+
config FB_RIVA
tristate "nVidia Riva support"
depends on FB && PCI
of debugging informations to provide to the maintainer when
something goes wrong.
+config FB_RIVA_BACKLIGHT
+ bool "Support for backlight control"
+ depends on FB_RIVA && PPC_PMAC
+ select FB_BACKLIGHT
+ select BACKLIGHT_LCD_SUPPORT
+ select BACKLIGHT_CLASS_DEVICE
+ default y
+ help
+ Say Y here if you want to control the backlight of your display.
+
config FB_I810
tristate "Intel 810/815 support (EXPERIMENTAL)"
depends on FB && EXPERIMENTAL && PCI && X86_32
There is a product page at
http://apps.ati.com/ATIcompare/
+
config FB_RADEON_I2C
bool "DDC/I2C for ATI Radeon support"
depends on FB_RADEON
help
Say Y here if you want DDC/I2C support for your Radeon board.
+config FB_RADEON_BACKLIGHT
+ bool "Support for backlight control"
+ depends on FB_RADEON && PPC_PMAC
+ select FB_BACKLIGHT
+ select BACKLIGHT_LCD_SUPPORT
+ select BACKLIGHT_CLASS_DEVICE
+ default y
+ help
+ Say Y here if you want to control the backlight of your display.
+
config FB_RADEON_DEBUG
bool "Lots of debug output from Radeon driver"
depends on FB_RADEON
To compile this driver as a module, choose M here: the
module will be called aty128fb.
+config FB_ATY128_BACKLIGHT
+ bool "Support for backlight control"
+ depends on FB_ATY128 && PPC_PMAC
+ select FB_BACKLIGHT
+ select BACKLIGHT_LCD_SUPPORT
+ select BACKLIGHT_CLASS_DEVICE
+ default y
+ help
+ Say Y here if you want to control the backlight of your display.
+
config FB_ATY
tristate "ATI Mach64 display support" if PCI || ATARI
depends on FB && !SPARC32
is at
<http://support.ati.com/products/pc/mach64/graphics_xpression.html>.
+config FB_ATY_BACKLIGHT
+ bool "Support for backlight control"
+ depends on FB_ATY && PPC_PMAC
+ select FB_BACKLIGHT
+ select BACKLIGHT_LCD_SUPPORT
+ select BACKLIGHT_CLASS_DEVICE
+ default y
+ help
+ Say Y here if you want to control the backlight of your display.
+
config FB_S3TRIO
bool "S3 Trio display support"
depends on (FB = y) && PPC && BROKEN
radeonfb-y := radeon_base.o radeon_pm.o radeon_monitor.o radeon_accel.o
radeonfb-$(CONFIG_FB_RADEON_I2C) += radeon_i2c.o
+radeonfb-$(CONFIG_FB_RADEON_BACKLIGHT) += radeon_backlight.o
radeonfb-objs := $(radeonfb-y)
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/console.h>
+#include <linux/backlight.h>
#include <asm/io.h>
#ifdef CONFIG_PPC_PMAC
.fb_imageblit = cfb_imageblit,
};
-#ifdef CONFIG_PMAC_BACKLIGHT
-static int aty128_set_backlight_enable(int on, int level, void* data);
-static int aty128_set_backlight_level(int level, void* data);
-
-static struct backlight_controller aty128_backlight_controller = {
- aty128_set_backlight_enable,
- aty128_set_backlight_level
-};
-#endif /* CONFIG_PMAC_BACKLIGHT */
-
/*
* Functions to read from/write to the mmio registers
* - endian conversions may possibly be avoided by
static void aty128_set_lcd_enable(struct aty128fb_par *par, int on)
{
u32 reg;
+#ifdef CONFIG_FB_ATY128_BACKLIGHT
+ struct fb_info *info = pci_get_drvdata(par->pdev);
+#endif
if (on) {
reg = aty_ld_le32(LVDS_GEN_CNTL);
reg |= LVDS_ON | LVDS_EN | LVDS_BLON | LVDS_DIGION;
reg &= ~LVDS_DISPLAY_DIS;
aty_st_le32(LVDS_GEN_CNTL, reg);
-#ifdef CONFIG_PMAC_BACKLIGHT
- aty128_set_backlight_enable(get_backlight_enable(),
- get_backlight_level(), par);
+#ifdef CONFIG_FB_ATY128_BACKLIGHT
+ mutex_lock(&info->bl_mutex);
+ if (info->bl_dev) {
+ down(&info->bl_dev->sem);
+ info->bl_dev->props->update_status(info->bl_dev);
+ up(&info->bl_dev->sem);
+ }
+ mutex_unlock(&info->bl_mutex);
#endif
} else {
-#ifdef CONFIG_PMAC_BACKLIGHT
- aty128_set_backlight_enable(0, 0, par);
+#ifdef CONFIG_FB_ATY128_BACKLIGHT
+ mutex_lock(&info->bl_mutex);
+ if (info->bl_dev) {
+ down(&info->bl_dev->sem);
+ info->bl_dev->props->brightness = 0;
+ 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);
#endif
reg = aty_ld_le32(LVDS_GEN_CNTL);
reg |= LVDS_DISPLAY_DIS;
}
#endif /* MODULE */
+/* Backlight */
+#ifdef CONFIG_FB_ATY128_BACKLIGHT
+#define MAX_LEVEL 0xFF
+
+static struct backlight_properties aty128_bl_data;
+
+static int aty128_bl_get_level_brightness(struct aty128fb_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 = MAX_LEVEL -
+ (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;
+
+ return atylevel;
+}
+
+/* We turn off the LCD completely instead of just dimming the backlight.
+ * This provides greater power saving and the display is useless without
+ * backlight anyway
+ */
+#define BACKLIGHT_LVDS_OFF
+/* That one prevents proper CRT output with LCD off */
+#undef BACKLIGHT_DAC_OFF
+
+static int aty128_bl_update_status(struct backlight_device *bd)
+{
+ struct aty128fb_par *par = class_get_devdata(&bd->class_dev);
+ unsigned int reg = aty_ld_le32(LVDS_GEN_CNTL);
+ int level;
+
+ if (bd->props->power != FB_BLANK_UNBLANK ||
+ bd->props->fb_blank != FB_BLANK_UNBLANK ||
+ !par->lcd_on)
+ level = 0;
+ else
+ level = bd->props->brightness;
+
+ reg |= LVDS_BL_MOD_EN | LVDS_BLON;
+ if (level > 0) {
+ reg |= LVDS_DIGION;
+ if (!(reg & LVDS_ON)) {
+ reg &= ~LVDS_BLON;
+ aty_st_le32(LVDS_GEN_CNTL, reg);
+ aty_ld_le32(LVDS_GEN_CNTL);
+ mdelay(10);
+ reg |= LVDS_BLON;
+ aty_st_le32(LVDS_GEN_CNTL, reg);
+ }
+ reg &= ~LVDS_BL_MOD_LEVEL_MASK;
+ reg |= (aty128_bl_get_level_brightness(par, level) << LVDS_BL_MOD_LEVEL_SHIFT);
+#ifdef BACKLIGHT_LVDS_OFF
+ reg |= LVDS_ON | LVDS_EN;
+ reg &= ~LVDS_DISPLAY_DIS;
+#endif
+ aty_st_le32(LVDS_GEN_CNTL, reg);
+#ifdef BACKLIGHT_DAC_OFF
+ aty_st_le32(DAC_CNTL, aty_ld_le32(DAC_CNTL) & (~DAC_PDWN));
+#endif
+ } else {
+ reg &= ~LVDS_BL_MOD_LEVEL_MASK;
+ reg |= (aty128_bl_get_level_brightness(par, 0) << LVDS_BL_MOD_LEVEL_SHIFT);
+#ifdef BACKLIGHT_LVDS_OFF
+ reg |= LVDS_DISPLAY_DIS;
+ aty_st_le32(LVDS_GEN_CNTL, reg);
+ aty_ld_le32(LVDS_GEN_CNTL);
+ udelay(10);
+ reg &= ~(LVDS_ON | LVDS_EN | LVDS_BLON | LVDS_DIGION);
+#endif
+ aty_st_le32(LVDS_GEN_CNTL, reg);
+#ifdef BACKLIGHT_DAC_OFF
+ aty_st_le32(DAC_CNTL, aty_ld_le32(DAC_CNTL) | DAC_PDWN);
+#endif
+ }
+
+ return 0;
+}
+
+static int aty128_bl_get_brightness(struct backlight_device *bd)
+{
+ return bd->props->brightness;
+}
+
+static struct backlight_properties aty128_bl_data = {
+ .owner = THIS_MODULE,
+ .get_brightness = aty128_bl_get_brightness,
+ .update_status = aty128_bl_update_status,
+ .max_brightness = (FB_BACKLIGHT_LEVELS - 1),
+};
+
+static void aty128_bl_init(struct aty128fb_par *par)
+{
+ struct fb_info *info = pci_get_drvdata(par->pdev);
+ struct backlight_device *bd;
+ char name[12];
+
+ /* Could be extended to Rage128Pro LVDS output too */
+ if (par->chip_gen != rage_M3)
+ return;
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ if (!pmac_has_backlight_type("ati"))
+ return;
+#endif
+
+ snprintf(name, sizeof(name), "aty128bl%d", info->node);
+
+ bd = backlight_device_register(name, par, &aty128_bl_data);
+ if (IS_ERR(bd)) {
+ info->bl_dev = NULL;
+ printk("aty128: Backlight registration failed\n");
+ goto error;
+ }
+
+ mutex_lock(&info->bl_mutex);
+ info->bl_dev = bd;
+ fb_bl_default_curve(info, 0,
+ 63 * FB_BACKLIGHT_MAX / MAX_LEVEL,
+ 219 * FB_BACKLIGHT_MAX / MAX_LEVEL);
+ mutex_unlock(&info->bl_mutex);
+
+ up(&bd->sem);
+ bd->props->brightness = aty128_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("aty128: Backlight initialized (%s)\n", name);
+
+ return;
+
+error:
+ return;
+}
+
+static void aty128_bl_exit(struct aty128fb_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);
+ info->bl_dev = NULL;
+
+ printk("aty128: Backlight unloaded\n");
+ }
+ mutex_unlock(&info->bl_mutex);
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ mutex_unlock(&pmac_backlight_mutex);
+#endif
+}
+#endif /* CONFIG_FB_ATY128_BACKLIGHT */
/*
* Initialisation
if (register_framebuffer(info) < 0)
return 0;
-#ifdef CONFIG_PMAC_BACKLIGHT
- /* Could be extended to Rage128Pro LVDS output too */
- if (par->chip_gen == rage_M3)
- register_backlight_controller(&aty128_backlight_controller, par, "ati");
-#endif /* CONFIG_PMAC_BACKLIGHT */
-
par->pm_reg = pci_find_capability(pdev, PCI_CAP_ID_PM);
par->pdev = pdev;
par->asleep = 0;
par->lock_blank = 0;
-
+
+#ifdef CONFIG_FB_ATY128_BACKLIGHT
+ aty128_bl_init(par);
+#endif
+
printk(KERN_INFO "fb%d: %s frame buffer device on %s\n",
info->node, info->fix.id, video_card);
par = info->par;
+#ifdef CONFIG_FB_ATY128_BACKLIGHT
+ aty128_bl_exit(par);
+#endif
+
unregister_framebuffer(info);
#ifdef CONFIG_MTRR
if (par->mtrr.vram_valid)
if (par->lock_blank || par->asleep)
return 0;
-#ifdef CONFIG_PMAC_BACKLIGHT
- if (machine_is(powermac) && blank)
- set_backlight_enable(0);
-#endif /* CONFIG_PMAC_BACKLIGHT */
+#ifdef CONFIG_FB_ATY128_BACKLIGHT
+ if (machine_is(powermac) && blank) {
+ down(&fb->bl_dev->sem);
+ fb->bl_dev->props->power = FB_BLANK_POWERDOWN;
+ fb->bl_dev->props->update_status(fb->bl_dev);
+ up(&fb->bl_dev->sem);
+ }
+#endif
if (blank & FB_BLANK_VSYNC_SUSPEND)
state |= 2;
aty128_set_crt_enable(par, par->crt_on && !blank);
aty128_set_lcd_enable(par, par->lcd_on && !blank);
}
-#ifdef CONFIG_PMAC_BACKLIGHT
- if (machine_is(powermac) && !blank)
- set_backlight_enable(1);
-#endif /* CONFIG_PMAC_BACKLIGHT */
+#ifdef CONFIG_FB_ATY128_BACKLIGHT
+ if (machine_is(powermac) && !blank) {
+ down(&fb->bl_dev->sem);
+ fb->bl_dev->props->power = FB_BLANK_UNBLANK;
+ fb->bl_dev->props->update_status(fb->bl_dev);
+ up(&fb->bl_dev->sem);
+ }
+#endif
return 0;
}
return -EINVAL;
}
-#ifdef CONFIG_PMAC_BACKLIGHT
-static int backlight_conv[] = {
- 0xff, 0xc0, 0xb5, 0xaa, 0x9f, 0x94, 0x89, 0x7e,
- 0x73, 0x68, 0x5d, 0x52, 0x47, 0x3c, 0x31, 0x24
-};
-
-/* We turn off the LCD completely instead of just dimming the backlight.
- * This provides greater power saving and the display is useless without
- * backlight anyway
- */
-#define BACKLIGHT_LVDS_OFF
-/* That one prevents proper CRT output with LCD off */
-#undef BACKLIGHT_DAC_OFF
-
-static int aty128_set_backlight_enable(int on, int level, void *data)
-{
- struct aty128fb_par *par = data;
- unsigned int reg = aty_ld_le32(LVDS_GEN_CNTL);
-
- if (!par->lcd_on)
- on = 0;
- reg |= LVDS_BL_MOD_EN | LVDS_BLON;
- if (on && level > BACKLIGHT_OFF) {
- reg |= LVDS_DIGION;
- if (!(reg & LVDS_ON)) {
- reg &= ~LVDS_BLON;
- aty_st_le32(LVDS_GEN_CNTL, reg);
- (void)aty_ld_le32(LVDS_GEN_CNTL);
- mdelay(10);
- reg |= LVDS_BLON;
- aty_st_le32(LVDS_GEN_CNTL, reg);
- }
- reg &= ~LVDS_BL_MOD_LEVEL_MASK;
- reg |= (backlight_conv[level] << LVDS_BL_MOD_LEVEL_SHIFT);
-#ifdef BACKLIGHT_LVDS_OFF
- reg |= LVDS_ON | LVDS_EN;
- reg &= ~LVDS_DISPLAY_DIS;
-#endif
- aty_st_le32(LVDS_GEN_CNTL, reg);
-#ifdef BACKLIGHT_DAC_OFF
- aty_st_le32(DAC_CNTL, aty_ld_le32(DAC_CNTL) & (~DAC_PDWN));
-#endif
- } else {
- reg &= ~LVDS_BL_MOD_LEVEL_MASK;
- reg |= (backlight_conv[0] << LVDS_BL_MOD_LEVEL_SHIFT);
-#ifdef BACKLIGHT_LVDS_OFF
- reg |= LVDS_DISPLAY_DIS;
- aty_st_le32(LVDS_GEN_CNTL, reg);
- (void)aty_ld_le32(LVDS_GEN_CNTL);
- udelay(10);
- reg &= ~(LVDS_ON | LVDS_EN | LVDS_BLON | LVDS_DIGION);
-#endif
- aty_st_le32(LVDS_GEN_CNTL, reg);
-#ifdef BACKLIGHT_DAC_OFF
- aty_st_le32(DAC_CNTL, aty_ld_le32(DAC_CNTL) | DAC_PDWN);
-#endif
- }
-
- return 0;
-}
-
-static int aty128_set_backlight_level(int level, void* data)
-{
- return aty128_set_backlight_enable(1, level, data);
-}
-#endif /* CONFIG_PMAC_BACKLIGHT */
-
#if 0
/*
* Accelerated functions
int lock_blank;
unsigned long res_start;
unsigned long res_size;
+ struct pci_dev *pdev;
#ifdef __sparc__
struct pci_mmap_map *mmap_map;
u8 mmaped;
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
+#include <linux/backlight.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#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)
{
/* 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
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)) {
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)) {
par->res_start = res_start;
par->res_size = res_size;
par->irq = pdev->irq;
+ par->pdev = pdev;
/* Setup "info" structure */
#ifdef __sparc__
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
--- /dev/null
+/*
+ * Backlight code for ATI Radeon based graphic cards
+ *
+ * Copyright (c) 2000 Ani Joshi <ajoshi@kernel.crashing.org>
+ * Copyright (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ * Copyright (c) 2006 Michael Hanselmann <linux-kernel@hansmi.ch>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "radeonfb.h"
+#include <linux/backlight.h>
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+#include <asm/backlight.h>
+#endif
+
+#define MAX_RADEON_LEVEL 0xFF
+
+static struct backlight_properties radeon_bl_data;
+
+struct radeon_bl_privdata {
+ struct radeonfb_info *rinfo;
+ uint8_t negative;
+};
+
+static int radeon_bl_get_level_brightness(struct radeon_bl_privdata *pdata,
+ int level)
+{
+ struct fb_info *info = pdata->rinfo->info;
+ int rlevel;
+
+ mutex_lock(&info->bl_mutex);
+
+ /* Get and convert the value */
+ rlevel = pdata->rinfo->info->bl_curve[level] *
+ FB_BACKLIGHT_MAX / MAX_RADEON_LEVEL;
+
+ mutex_unlock(&info->bl_mutex);
+
+ if (pdata->negative)
+ rlevel = MAX_RADEON_LEVEL - rlevel;
+
+ if (rlevel < 0)
+ rlevel = 0;
+ else if (rlevel > MAX_RADEON_LEVEL)
+ rlevel = MAX_RADEON_LEVEL;
+
+ return rlevel;
+}
+
+static int radeon_bl_update_status(struct backlight_device *bd)
+{
+ struct radeon_bl_privdata *pdata = class_get_devdata(&bd->class_dev);
+ struct radeonfb_info *rinfo = pdata->rinfo;
+ u32 lvds_gen_cntl, tmpPixclksCntl;
+ int level;
+
+ if (rinfo->mon1_type != MT_LCD)
+ return 0;
+
+ /* We turn off the LCD completely instead of just dimming the
+ * backlight. This provides some greater power saving and the display
+ * is useless without backlight anyway.
+ */
+ if (bd->props->power != FB_BLANK_UNBLANK ||
+ bd->props->fb_blank != FB_BLANK_UNBLANK)
+ level = 0;
+ else
+ level = bd->props->brightness;
+
+ del_timer_sync(&rinfo->lvds_timer);
+ radeon_engine_idle();
+
+ lvds_gen_cntl = INREG(LVDS_GEN_CNTL);
+ if (level > 0) {
+ lvds_gen_cntl &= ~LVDS_DISPLAY_DIS;
+ if (!(lvds_gen_cntl & LVDS_BLON) || !(lvds_gen_cntl & LVDS_ON)) {
+ lvds_gen_cntl |= (rinfo->init_state.lvds_gen_cntl & LVDS_DIGON);
+ lvds_gen_cntl |= LVDS_BLON | LVDS_EN;
+ OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
+ lvds_gen_cntl &= ~LVDS_BL_MOD_LEVEL_MASK;
+ lvds_gen_cntl |=
+ (radeon_bl_get_level_brightness(pdata, level) <<
+ LVDS_BL_MOD_LEVEL_SHIFT);
+ lvds_gen_cntl |= LVDS_ON;
+ lvds_gen_cntl |= (rinfo->init_state.lvds_gen_cntl & LVDS_BL_MOD_EN);
+ rinfo->pending_lvds_gen_cntl = lvds_gen_cntl;
+ mod_timer(&rinfo->lvds_timer,
+ jiffies + msecs_to_jiffies(rinfo->panel_info.pwr_delay));
+ } else {
+ lvds_gen_cntl &= ~LVDS_BL_MOD_LEVEL_MASK;
+ lvds_gen_cntl |=
+ (radeon_bl_get_level_brightness(pdata, level) <<
+ LVDS_BL_MOD_LEVEL_SHIFT);
+ OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
+ }
+ rinfo->init_state.lvds_gen_cntl &= ~LVDS_STATE_MASK;
+ rinfo->init_state.lvds_gen_cntl |= rinfo->pending_lvds_gen_cntl
+ & LVDS_STATE_MASK;
+ } else {
+ /* Asic bug, when turning off LVDS_ON, we have to make sure
+ RADEON_PIXCLK_LVDS_ALWAYS_ON bit is off
+ */
+ tmpPixclksCntl = INPLL(PIXCLKS_CNTL);
+ if (rinfo->is_mobility || rinfo->is_IGP)
+ OUTPLLP(PIXCLKS_CNTL, 0, ~PIXCLK_LVDS_ALWAYS_ONb);
+ lvds_gen_cntl &= ~(LVDS_BL_MOD_LEVEL_MASK | LVDS_BL_MOD_EN);
+ lvds_gen_cntl |= (radeon_bl_get_level_brightness(pdata, 0) <<
+ LVDS_BL_MOD_LEVEL_SHIFT);
+ lvds_gen_cntl |= LVDS_DISPLAY_DIS;
+ OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
+ udelay(100);
+ lvds_gen_cntl &= ~(LVDS_ON | LVDS_EN);
+ OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
+ lvds_gen_cntl &= ~(LVDS_DIGON);
+ rinfo->pending_lvds_gen_cntl = lvds_gen_cntl;
+ mod_timer(&rinfo->lvds_timer,
+ jiffies + msecs_to_jiffies(rinfo->panel_info.pwr_delay));
+ if (rinfo->is_mobility || rinfo->is_IGP)
+ OUTPLL(PIXCLKS_CNTL, tmpPixclksCntl);
+ }
+ rinfo->init_state.lvds_gen_cntl &= ~LVDS_STATE_MASK;
+ rinfo->init_state.lvds_gen_cntl |= (lvds_gen_cntl & LVDS_STATE_MASK);
+
+ return 0;
+}
+
+static int radeon_bl_get_brightness(struct backlight_device *bd)
+{
+ return bd->props->brightness;
+}
+
+static struct backlight_properties radeon_bl_data = {
+ .owner = THIS_MODULE,
+ .get_brightness = radeon_bl_get_brightness,
+ .update_status = radeon_bl_update_status,
+ .max_brightness = (FB_BACKLIGHT_LEVELS - 1),
+};
+
+void radeonfb_bl_init(struct radeonfb_info *rinfo)
+{
+ struct backlight_device *bd;
+ struct radeon_bl_privdata *pdata;
+ char name[12];
+
+ if (rinfo->mon1_type != MT_LCD)
+ return;
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ if (!pmac_has_backlight_type("ati") &&
+ !pmac_has_backlight_type("mnca"))
+ return;
+#endif
+
+ pdata = kmalloc(sizeof(struct radeon_bl_privdata), GFP_KERNEL);
+ if (!pdata) {
+ printk("radeonfb: Memory allocation failed\n");
+ goto error;
+ }
+
+ snprintf(name, sizeof(name), "radeonbl%d", rinfo->info->node);
+
+ bd = backlight_device_register(name, pdata, &radeon_bl_data);
+ if (IS_ERR(bd)) {
+ rinfo->info->bl_dev = NULL;
+ printk("radeonfb: Backlight registration failed\n");
+ goto error;
+ }
+
+ pdata->rinfo = rinfo;
+
+ /* Pardon me for that hack... maybe some day we can figure out in what
+ * direction backlight should work on a given panel?
+ */
+ pdata->negative =
+ (rinfo->family != CHIP_FAMILY_RV200 &&
+ rinfo->family != CHIP_FAMILY_RV250 &&
+ rinfo->family != CHIP_FAMILY_RV280 &&
+ rinfo->family != CHIP_FAMILY_RV350);
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ pdata->negative = pdata->negative ||
+ machine_is_compatible("PowerBook4,3") ||
+ machine_is_compatible("PowerBook6,3") ||
+ machine_is_compatible("PowerBook6,5");
+#endif
+
+ mutex_lock(&rinfo->info->bl_mutex);
+ rinfo->info->bl_dev = bd;
+ fb_bl_default_curve(rinfo->info, 0,
+ 63 * FB_BACKLIGHT_MAX / MAX_RADEON_LEVEL,
+ 217 * FB_BACKLIGHT_MAX / MAX_RADEON_LEVEL);
+ mutex_unlock(&rinfo->info->bl_mutex);
+
+ up(&bd->sem);
+ bd->props->brightness = radeon_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("radeonfb: Backlight initialized (%s)\n", name);
+
+ return;
+
+error:
+ kfree(pdata);
+ return;
+}
+
+void radeonfb_bl_exit(struct radeonfb_info *rinfo)
+{
+#ifdef CONFIG_PMAC_BACKLIGHT
+ mutex_lock(&pmac_backlight_mutex);
+#endif
+
+ mutex_lock(&rinfo->info->bl_mutex);
+ if (rinfo->info->bl_dev) {
+ struct radeon_bl_privdata *pdata;
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ if (pmac_backlight == rinfo->info->bl_dev)
+ pmac_backlight = NULL;
+#endif
+
+ pdata = class_get_devdata(&rinfo->info->bl_dev->class_dev);
+ backlight_device_unregister(rinfo->info->bl_dev);
+ kfree(pdata);
+ rinfo->info->bl_dev = NULL;
+
+ printk("radeonfb: Backlight unloaded\n");
+ }
+ mutex_unlock(&rinfo->info->bl_mutex);
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ mutex_unlock(&pmac_backlight_mutex);
+#endif
+}
#include <asm/pci-bridge.h>
#include "../macmodes.h"
-#ifdef CONFIG_PMAC_BACKLIGHT
-#include <asm/backlight.h>
-#endif
-
#ifdef CONFIG_BOOTX_TEXT
#include <asm/btext.h>
#endif
* prototypes
*/
-
-#ifdef CONFIG_PPC_OF
-
-#ifdef CONFIG_PMAC_BACKLIGHT
-static int radeon_set_backlight_enable(int on, int level, void *data);
-static int radeon_set_backlight_level(int level, void *data);
-static struct backlight_controller radeon_backlight_controller = {
- radeon_set_backlight_enable,
- radeon_set_backlight_level
-};
-#endif /* CONFIG_PMAC_BACKLIGHT */
-
-#endif /* CONFIG_PPC_OF */
-
static void radeon_unmap_ROM(struct radeonfb_info *rinfo, struct pci_dev *dev)
{
if (!rinfo->bios_seg)
return 0;
}
-
-#ifdef CONFIG_PMAC_BACKLIGHT
-
-/* TODO: Dbl check these tables, we don't go up to full ON backlight
- * in these, possibly because we noticed MacOS doesn't, but I'd prefer
- * having some more official numbers from ATI
- */
-static int backlight_conv_m6[] = {
- 0xff, 0xc0, 0xb5, 0xaa, 0x9f, 0x94, 0x89, 0x7e,
- 0x73, 0x68, 0x5d, 0x52, 0x47, 0x3c, 0x31, 0x24
-};
-static int backlight_conv_m7[] = {
- 0x00, 0x3f, 0x4a, 0x55, 0x60, 0x6b, 0x76, 0x81,
- 0x8c, 0x97, 0xa2, 0xad, 0xb8, 0xc3, 0xce, 0xd9
-};
-
-#define BACKLIGHT_LVDS_OFF
-#undef BACKLIGHT_DAC_OFF
-
-/* We turn off the LCD completely instead of just dimming the backlight.
- * This provides some greater power saving and the display is useless
- * without backlight anyway.
- */
-static int radeon_set_backlight_enable(int on, int level, void *data)
-{
- struct radeonfb_info *rinfo = (struct radeonfb_info *)data;
- u32 lvds_gen_cntl, tmpPixclksCntl;
- int* conv_table;
-
- if (rinfo->mon1_type != MT_LCD)
- return 0;
-
- /* Pardon me for that hack... maybe some day we can figure
- * out in what direction backlight should work on a given
- * panel ?
- */
- if ((rinfo->family == CHIP_FAMILY_RV200 ||
- rinfo->family == CHIP_FAMILY_RV250 ||
- rinfo->family == CHIP_FAMILY_RV280 ||
- rinfo->family == CHIP_FAMILY_RV350) &&
- !machine_is_compatible("PowerBook4,3") &&
- !machine_is_compatible("PowerBook6,3") &&
- !machine_is_compatible("PowerBook6,5"))
- conv_table = backlight_conv_m7;
- else
- conv_table = backlight_conv_m6;
-
- del_timer_sync(&rinfo->lvds_timer);
- radeon_engine_idle();
-
- lvds_gen_cntl = INREG(LVDS_GEN_CNTL);
- if (on && (level > BACKLIGHT_OFF)) {
- lvds_gen_cntl &= ~LVDS_DISPLAY_DIS;
- if (!(lvds_gen_cntl & LVDS_BLON) || !(lvds_gen_cntl & LVDS_ON)) {
- lvds_gen_cntl |= (rinfo->init_state.lvds_gen_cntl & LVDS_DIGON);
- lvds_gen_cntl |= LVDS_BLON | LVDS_EN;
- OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
- lvds_gen_cntl &= ~LVDS_BL_MOD_LEVEL_MASK;
- lvds_gen_cntl |= (conv_table[level] <<
- LVDS_BL_MOD_LEVEL_SHIFT);
- lvds_gen_cntl |= LVDS_ON;
- lvds_gen_cntl |= (rinfo->init_state.lvds_gen_cntl & LVDS_BL_MOD_EN);
- rinfo->pending_lvds_gen_cntl = lvds_gen_cntl;
- mod_timer(&rinfo->lvds_timer,
- jiffies + msecs_to_jiffies(rinfo->panel_info.pwr_delay));
- } else {
- lvds_gen_cntl &= ~LVDS_BL_MOD_LEVEL_MASK;
- lvds_gen_cntl |= (conv_table[level] <<
- LVDS_BL_MOD_LEVEL_SHIFT);
- OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
- }
- rinfo->init_state.lvds_gen_cntl &= ~LVDS_STATE_MASK;
- rinfo->init_state.lvds_gen_cntl |= rinfo->pending_lvds_gen_cntl
- & LVDS_STATE_MASK;
- } else {
- /* Asic bug, when turning off LVDS_ON, we have to make sure
- RADEON_PIXCLK_LVDS_ALWAYS_ON bit is off
- */
- tmpPixclksCntl = INPLL(PIXCLKS_CNTL);
- if (rinfo->is_mobility || rinfo->is_IGP)
- OUTPLLP(PIXCLKS_CNTL, 0, ~PIXCLK_LVDS_ALWAYS_ONb);
- lvds_gen_cntl &= ~(LVDS_BL_MOD_LEVEL_MASK | LVDS_BL_MOD_EN);
- lvds_gen_cntl |= (conv_table[0] <<
- LVDS_BL_MOD_LEVEL_SHIFT);
- lvds_gen_cntl |= LVDS_DISPLAY_DIS;
- OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
- udelay(100);
- lvds_gen_cntl &= ~(LVDS_ON | LVDS_EN);
- OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
- lvds_gen_cntl &= ~(LVDS_DIGON);
- rinfo->pending_lvds_gen_cntl = lvds_gen_cntl;
- mod_timer(&rinfo->lvds_timer,
- jiffies + msecs_to_jiffies(rinfo->panel_info.pwr_delay));
- if (rinfo->is_mobility || rinfo->is_IGP)
- OUTPLL(PIXCLKS_CNTL, tmpPixclksCntl);
- }
- rinfo->init_state.lvds_gen_cntl &= ~LVDS_STATE_MASK;
- rinfo->init_state.lvds_gen_cntl |= (lvds_gen_cntl & LVDS_STATE_MASK);
-
- return 0;
-}
-
-
-static int radeon_set_backlight_level(int level, void *data)
-{
- return radeon_set_backlight_enable(1, level, data);
-}
-#endif /* CONFIG_PMAC_BACKLIGHT */
-
-
/*
* This reconfigure the card's internal memory map. In theory, we'd like
* to setup the card's memory at the same address as it's PCI bus address,
MTRR_TYPE_WRCOMB, 1);
#endif
-#ifdef CONFIG_PMAC_BACKLIGHT
- if (rinfo->mon1_type == MT_LCD) {
- register_backlight_controller(&radeon_backlight_controller,
- rinfo, "ati");
- register_backlight_controller(&radeon_backlight_controller,
- rinfo, "mnca");
- }
-#endif
+ radeonfb_bl_init(rinfo);
printk ("radeonfb (%s): %s\n", pci_name(rinfo->pdev), rinfo->name);
if (!rinfo)
return;
-
+
+ radeonfb_bl_exit(rinfo);
radeonfb_pm_exit(rinfo);
if (rinfo->mon1_EDID)
extern void radeon_write_mode (struct radeonfb_info *rinfo, struct radeon_regs *mode,
int reg_only);
+/* Backlight functions */
+#ifdef CONFIG_FB_RADEON_BACKLIGHT
+extern void radeonfb_bl_init(struct radeonfb_info *rinfo);
+extern void radeonfb_bl_exit(struct radeonfb_info *rinfo);
+#else
+static inline void radeonfb_bl_init(struct radeonfb_info *rinfo) {}
+static inline void radeonfb_bl_exit(struct radeonfb_info *rinfo) {}
+#endif
+
#endif /* __RADEONFB_H__ */
static int chipsfb_blank(int blank, struct fb_info *info)
{
#ifdef CONFIG_PMAC_BACKLIGHT
- // used to disable backlight only for blank > 1, but it seems
- // useful at blank = 1 too (saves battery, extends backlight life)
- set_backlight_enable(!blank);
+ mutex_lock(&pmac_backlight_mutex);
+
+ if (pmac_backlight) {
+ down(&pmac_backlight->sem);
+
+ /* used to disable backlight only for blank > 1, but it seems
+ * useful at blank = 1 too (saves battery, extends backlight
+ * life)
+ */
+ if (blank)
+ pmac_backlight->props->power = FB_BLANK_POWERDOWN;
+ else
+ pmac_backlight->props->power = FB_BLANK_UNBLANK;
+ pmac_backlight->props->update_status(pmac_backlight);
+ up(&pmac_backlight->sem);
+ }
+
+ mutex_unlock(&pmac_backlight_mutex);
#endif /* CONFIG_PMAC_BACKLIGHT */
return 1; /* get fb_blank to set the colormap to all black */
#ifdef CONFIG_PMAC_BACKLIGHT
/* turn on the backlight */
- set_backlight_enable(1);
+ mutex_lock(&pmac_backlight_mutex);
+ if (pmac_backlight) {
+ down(&pmac_backlight->sem);
+ pmac_backlight->props->power = FB_BLANK_UNBLANK;
+ pmac_backlight->props->update_status(pmac_backlight);
+ up(&pmac_backlight->sem);
+ }
+ mutex_unlock(&pmac_backlight_mutex);
#endif /* CONFIG_PMAC_BACKLIGHT */
#ifdef CONFIG_PPC
#include <linux/kernel.h>
#include <linux/fb.h>
#include <linux/console.h>
+#include <linux/module.h>
/**
* framebuffer_alloc - creates a new frame buffer info structure
info->device = dev;
+#ifdef CONFIG_FB_BACKLIGHT
+ mutex_init(&info->bl_mutex);
+#endif
+
return info;
#undef PADDING
#undef BYTES_PER_LONG
return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->state);
}
+#ifdef CONFIG_FB_BACKLIGHT
+static ssize_t store_bl_curve(struct class_device *class_device,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = class_get_devdata(class_device);
+ u8 tmp_curve[FB_BACKLIGHT_LEVELS];
+ unsigned int i;
+
+ if (count != (FB_BACKLIGHT_LEVELS / 8 * 24))
+ return -EINVAL;
+
+ for (i = 0; i < (FB_BACKLIGHT_LEVELS / 8); ++i)
+ if (sscanf(&buf[i * 24],
+ "%2hhx %2hhx %2hhx %2hhx %2hhx %2hhx %2hhx %2hhx\n",
+ &tmp_curve[i * 8 + 0],
+ &tmp_curve[i * 8 + 1],
+ &tmp_curve[i * 8 + 2],
+ &tmp_curve[i * 8 + 3],
+ &tmp_curve[i * 8 + 4],
+ &tmp_curve[i * 8 + 5],
+ &tmp_curve[i * 8 + 6],
+ &tmp_curve[i * 8 + 7]) != 8)
+ return -EINVAL;
+
+ /* If there has been an error in the input data, we won't
+ * reach this loop.
+ */
+ mutex_lock(&fb_info->bl_mutex);
+ for (i = 0; i < FB_BACKLIGHT_LEVELS; ++i)
+ fb_info->bl_curve[i] = tmp_curve[i];
+ mutex_unlock(&fb_info->bl_mutex);
+
+ return count;
+}
+
+static ssize_t show_bl_curve(struct class_device *class_device, char *buf)
+{
+ struct fb_info *fb_info = class_get_devdata(class_device);
+ ssize_t len = 0;
+ unsigned int i;
+
+ mutex_lock(&fb_info->bl_mutex);
+ for (i = 0; i < FB_BACKLIGHT_LEVELS; i += 8)
+ len += snprintf(&buf[len], PAGE_SIZE,
+ "%02x %02x %02x %02x %02x %02x %02x %02x\n",
+ fb_info->bl_curve[i + 0],
+ fb_info->bl_curve[i + 1],
+ fb_info->bl_curve[i + 2],
+ fb_info->bl_curve[i + 3],
+ fb_info->bl_curve[i + 4],
+ fb_info->bl_curve[i + 5],
+ fb_info->bl_curve[i + 6],
+ fb_info->bl_curve[i + 7]);
+ mutex_unlock(&fb_info->bl_mutex);
+
+ return len;
+}
+#endif
+
/* When cmap is added back in it should be a binary attribute
* not a text one. Consideration should also be given to converting
* fbdev to use configfs instead of sysfs */
__ATTR(con_rotate, S_IRUGO|S_IWUSR, show_con_rotate, store_con_rotate),
__ATTR(con_rotate_all, S_IWUSR, NULL, store_con_rotate_all),
__ATTR(state, S_IRUGO|S_IWUSR, show_fbstate, store_fbstate),
+#ifdef CONFIG_FB_BACKLIGHT
+ __ATTR(bl_curve, S_IRUGO|S_IWUSR, show_bl_curve, store_bl_curve),
+#endif
};
int fb_init_class_device(struct fb_info *fb_info)
&class_device_attrs[i]);
}
+#ifdef 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);
+
+ 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);
+}
+EXPORT_SYMBOL_GPL(fb_bl_default_curve);
+#endif
nvidiafb-y := nvidia.o nv_hw.o nv_setup.o \
nv_accel.o
nvidiafb-$(CONFIG_FB_NVIDIA_I2C) += nv_i2c.o
+nvidiafb-$(CONFIG_FB_NVIDIA_BACKLIGHT) += nv_backlight.o
nvidiafb-$(CONFIG_PPC_OF) += nv_of.o
-nvidiafb-objs := $(nvidiafb-y)
\ No newline at end of file
+nvidiafb-objs := $(nvidiafb-y)
--- /dev/null
+/*
+ * Backlight code for nVidia based graphic cards
+ *
+ * Copyright 2004 Antonino Daplas <adaplas@pol.net>
+ * Copyright (c) 2006 Michael Hanselmann <linux-kernel@hansmi.ch>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/backlight.h>
+#include <linux/fb.h>
+#include <linux/pci.h>
+#include "nv_local.h"
+#include "nv_type.h"
+#include "nv_proto.h"
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+#include <asm/backlight.h>
+#include <asm/machdep.h>
+#endif
+
+/* We do not have any information about which values are allowed, thus
+ * we used safe values.
+ */
+#define MIN_LEVEL 0x158
+#define MAX_LEVEL 0x534
+
+static struct backlight_properties nvidia_bl_data;
+
+static int nvidia_bl_get_level_brightness(struct nvidia_par *par,
+ int level)
+{
+ struct fb_info *info = pci_get_drvdata(par->pci_dev);
+ int nlevel;
+
+ /* Get and convert the value */
+ mutex_lock(&info->bl_mutex);
+ nlevel = info->bl_curve[level] * FB_BACKLIGHT_MAX / MAX_LEVEL;
+ mutex_unlock(&info->bl_mutex);
+
+ if (nlevel < 0)
+ nlevel = 0;
+ else if (nlevel < MIN_LEVEL)
+ nlevel = MIN_LEVEL;
+ else if (nlevel > MAX_LEVEL)
+ nlevel = MAX_LEVEL;
+
+ return nlevel;
+}
+
+static int nvidia_bl_update_status(struct backlight_device *bd)
+{
+ struct nvidia_par *par = class_get_devdata(&bd->class_dev);
+ u32 tmp_pcrt, tmp_pmc, fpcontrol;
+ int level;
+
+ if (!par->FlatPanel)
+ return 0;
+
+ if (bd->props->power != FB_BLANK_UNBLANK ||
+ bd->props->fb_blank != FB_BLANK_UNBLANK)
+ level = 0;
+ else
+ level = bd->props->brightness;
+
+ tmp_pmc = NV_RD32(par->PMC, 0x10F0) & 0x0000FFFF;
+ tmp_pcrt = NV_RD32(par->PCRTC0, 0x081C) & 0xFFFFFFFC;
+ fpcontrol = NV_RD32(par->PRAMDAC, 0x0848) & 0xCFFFFFCC;
+
+ if (level > 0) {
+ tmp_pcrt |= 0x1;
+ tmp_pmc |= (1 << 31); /* backlight bit */
+ tmp_pmc |= nvidia_bl_get_level_brightness(par, level) << 16;
+ fpcontrol |= par->fpSyncs;
+ } else
+ fpcontrol |= 0x20000022;
+
+ NV_WR32(par->PCRTC0, 0x081C, tmp_pcrt);
+ NV_WR32(par->PMC, 0x10F0, tmp_pmc);
+ NV_WR32(par->PRAMDAC, 0x848, fpcontrol);
+
+ return 0;
+}
+
+static int nvidia_bl_get_brightness(struct backlight_device *bd)
+{
+ return bd->props->brightness;
+}
+
+static struct backlight_properties nvidia_bl_data = {
+ .owner = THIS_MODULE,
+ .get_brightness = nvidia_bl_get_brightness,
+ .update_status = nvidia_bl_update_status,
+ .max_brightness = (FB_BACKLIGHT_LEVELS - 1),
+};
+
+void nvidia_bl_init(struct nvidia_par *par)
+{
+ struct fb_info *info = pci_get_drvdata(par->pci_dev);
+ struct backlight_device *bd;
+ char name[12];
+
+ if (!par->FlatPanel)
+ return;
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ if (!machine_is(powermac) ||
+ !pmac_has_backlight_type("mnca"))
+ return;
+#endif
+
+ snprintf(name, sizeof(name), "nvidiabl%d", info->node);
+
+ bd = backlight_device_register(name, par, &nvidia_bl_data);
+ if (IS_ERR(bd)) {
+ info->bl_dev = NULL;
+ printk("nvidia: Backlight registration failed\n");
+ goto error;
+ }
+
+ mutex_lock(&info->bl_mutex);
+ info->bl_dev = bd;
+ fb_bl_default_curve(info, 0,
+ 0x158 * FB_BACKLIGHT_MAX / MAX_LEVEL,
+ 0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL);
+ mutex_unlock(&info->bl_mutex);
+
+ up(&bd->sem);
+ bd->props->brightness = nvidia_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("nvidia: Backlight initialized (%s)\n", name);
+
+ return;
+
+error:
+ return;
+}
+
+void nvidia_bl_exit(struct nvidia_par *par)
+{
+ struct fb_info *info = pci_get_drvdata(par->pci_dev);
+
+#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("nvidia: Backlight unloaded\n");
+ }
+ mutex_unlock(&info->bl_mutex);
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ mutex_unlock(&pmac_backlight_mutex);
+#endif
+}
const struct fb_image *image);
extern int nvidiafb_sync(struct fb_info *info);
extern u8 byte_rev[256];
+
+/* in nv_backlight.h */
+#ifdef CONFIG_FB_NVIDIA_BACKLIGHT
+extern void nvidia_bl_init(struct nvidia_par *par);
+extern void nvidia_bl_exit(struct nvidia_par *par);
+#else
+static inline void nvidia_bl_init(struct nvidia_par *par) {}
+static inline void nvidia_bl_exit(struct nvidia_par *par) {}
+#endif
+
#endif /* __NV_PROTO_H__ */
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/console.h>
+#include <linux/backlight.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#endif
-#ifdef CONFIG_PMAC_BACKLIGHT
-#include <asm/machdep.h>
-#include <asm/backlight.h>
-#endif
#include "nv_local.h"
#include "nv_type.h"
.vmode = FB_VMODE_NONINTERLACED
};
-/*
- * Backlight control
- */
-#ifdef CONFIG_PMAC_BACKLIGHT
-
-static int nvidia_backlight_levels[] = {
- 0x158,
- 0x192,
- 0x1c6,
- 0x200,
- 0x234,
- 0x268,
- 0x2a2,
- 0x2d6,
- 0x310,
- 0x344,
- 0x378,
- 0x3b2,
- 0x3e6,
- 0x41a,
- 0x454,
- 0x534,
-};
-
-/* ------------------------------------------------------------------------- *
- *
- * Backlight operations
- *
- * ------------------------------------------------------------------------- */
-
-static int nvidia_set_backlight_enable(int on, int level, void *data)
-{
- struct nvidia_par *par = data;
- u32 tmp_pcrt, tmp_pmc, fpcontrol;
-
- tmp_pmc = NV_RD32(par->PMC, 0x10F0) & 0x0000FFFF;
- tmp_pcrt = NV_RD32(par->PCRTC0, 0x081C) & 0xFFFFFFFC;
- fpcontrol = NV_RD32(par->PRAMDAC, 0x0848) & 0xCFFFFFCC;
-
- if (on && (level > BACKLIGHT_OFF)) {
- tmp_pcrt |= 0x1;
- tmp_pmc |= (1 << 31); // backlight bit
- tmp_pmc |= nvidia_backlight_levels[level - 1] << 16;
- }
-
- if (on)
- fpcontrol |= par->fpSyncs;
- else
- fpcontrol |= 0x20000022;
-
- NV_WR32(par->PCRTC0, 0x081C, tmp_pcrt);
- NV_WR32(par->PMC, 0x10F0, tmp_pmc);
- NV_WR32(par->PRAMDAC, 0x848, fpcontrol);
-
- return 0;
-}
-
-static int nvidia_set_backlight_level(int level, void *data)
-{
- return nvidia_set_backlight_enable(1, level, data);
-}
-
-static struct backlight_controller nvidia_backlight_controller = {
- nvidia_set_backlight_enable,
- nvidia_set_backlight_level
-};
-
-#endif /* CONFIG_PMAC_BACKLIGHT */
-
static void nvidiafb_load_cursor_image(struct nvidia_par *par, u8 * data8,
u16 bg, u16 fg, u32 w, u32 h)
{
NVWriteSeq(par, 0x01, tmp);
NVWriteCrtc(par, 0x1a, vesa);
-#ifdef CONFIG_PMAC_BACKLIGHT
- if (par->FlatPanel && machine_is(powermac)) {
- set_backlight_enable(!blank);
+#ifdef CONFIG_FB_NVIDIA_BACKLIGHT
+ mutex_lock(&info->bl_mutex);
+ if (info->bl_dev) {
+ down(&info->bl_dev->sem);
+ info->bl_dev->props->power = blank;
+ info->bl_dev->props->update_status(info->bl_dev);
+ up(&info->bl_dev->sem);
}
+ mutex_unlock(&info->bl_mutex);
#endif
NVTRACE_LEAVE();
"PCI nVidia %s framebuffer (%dMB @ 0x%lX)\n",
info->fix.id,
par->FbMapSize / (1024 * 1024), info->fix.smem_start);
-#ifdef CONFIG_PMAC_BACKLIGHT
- if (par->FlatPanel && machine_is(powermac))
- register_backlight_controller(&nvidia_backlight_controller,
- par, "mnca");
-#endif
+
+ nvidia_bl_init(par);
+
NVTRACE_LEAVE();
return 0;
NVTRACE_ENTER();
+ nvidia_bl_exit(par);
+
unregister_framebuffer(info);
#ifdef CONFIG_MTRR
if (par->mtrr.vram_valid)
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
+#include <linux/backlight.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
/*
* Backlight control
*/
-#ifdef CONFIG_PMAC_BACKLIGHT
+#ifdef CONFIG_FB_RIVA_BACKLIGHT
+/* We do not have any information about which values are allowed, thus
+ * we used safe values.
+ */
+#define MIN_LEVEL 0x158
+#define MAX_LEVEL 0x534
-static int riva_backlight_levels[] = {
- 0x158,
- 0x192,
- 0x1c6,
- 0x200,
- 0x234,
- 0x268,
- 0x2a2,
- 0x2d6,
- 0x310,
- 0x344,
- 0x378,
- 0x3b2,
- 0x3e6,
- 0x41a,
- 0x454,
- 0x534,
-};
+static struct backlight_properties riva_bl_data;
+
+static int riva_bl_get_level_brightness(struct riva_par *par,
+ int level)
+{
+ struct fb_info *info = pci_get_drvdata(par->pdev);
+ int nlevel;
+
+ /* Get and convert the value */
+ mutex_lock(&info->bl_mutex);
+ nlevel = info->bl_curve[level] * FB_BACKLIGHT_MAX / MAX_LEVEL;
+ mutex_unlock(&info->bl_mutex);
+
+ if (nlevel < 0)
+ nlevel = 0;
+ else if (nlevel < MIN_LEVEL)
+ nlevel = MIN_LEVEL;
+ else if (nlevel > MAX_LEVEL)
+ nlevel = MAX_LEVEL;
+
+ return nlevel;
+}
+
+static int riva_bl_update_status(struct backlight_device *bd)
+{
+ struct riva_par *par = class_get_devdata(&bd->class_dev);
+ U032 tmp_pcrt, tmp_pmc;
+ int level;
+
+ if (bd->props->power != FB_BLANK_UNBLANK ||
+ bd->props->fb_blank != FB_BLANK_UNBLANK)
+ level = 0;
+ else
+ level = bd->props->brightness;
+
+ tmp_pmc = par->riva.PMC[0x10F0/4] & 0x0000FFFF;
+ tmp_pcrt = par->riva.PCRTC0[0x081C/4] & 0xFFFFFFFC;
+ if(level > 0) {
+ tmp_pcrt |= 0x1;
+ tmp_pmc |= (1 << 31); /* backlight bit */
+ tmp_pmc |= riva_bl_get_level_brightness(par, level) << 16; /* level */
+ }
+ par->riva.PCRTC0[0x081C/4] = tmp_pcrt;
+ par->riva.PMC[0x10F0/4] = tmp_pmc;
+
+ return 0;
+}
+
+static int riva_bl_get_brightness(struct backlight_device *bd)
+{
+ return bd->props->brightness;
+}
-static int riva_set_backlight_enable(int on, int level, void *data);
-static int riva_set_backlight_level(int level, void *data);
-static struct backlight_controller riva_backlight_controller = {
- riva_set_backlight_enable,
- riva_set_backlight_level
+static struct backlight_properties riva_bl_data = {
+ .owner = THIS_MODULE,
+ .get_brightness = riva_bl_get_brightness,
+ .update_status = riva_bl_update_status,
+ .max_brightness = (FB_BACKLIGHT_LEVELS - 1),
};
-#endif /* CONFIG_PMAC_BACKLIGHT */
+
+static void riva_bl_init(struct riva_par *par)
+{
+ struct fb_info *info = pci_get_drvdata(par->pdev);
+ struct backlight_device *bd;
+ char name[12];
+
+ if (!par->FlatPanel)
+ return;
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ if (!machine_is(powermac) ||
+ !pmac_has_backlight_type("mnca"))
+ return;
+#endif
+
+ snprintf(name, sizeof(name), "rivabl%d", info->node);
+
+ bd = backlight_device_register(name, par, &riva_bl_data);
+ if (IS_ERR(bd)) {
+ info->bl_dev = NULL;
+ printk("riva: Backlight registration failed\n");
+ goto error;
+ }
+
+ mutex_lock(&info->bl_mutex);
+ info->bl_dev = bd;
+ fb_bl_default_curve(info, 0,
+ 0x158 * FB_BACKLIGHT_MAX / MAX_LEVEL,
+ 0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL);
+ mutex_unlock(&info->bl_mutex);
+
+ up(&bd->sem);
+ bd->props->brightness = riva_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("riva: Backlight initialized (%s)\n", name);
+
+ return;
+
+error:
+ return;
+}
+
+static void riva_bl_exit(struct riva_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("riva: Backlight unloaded\n");
+ }
+ mutex_unlock(&info->bl_mutex);
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+ mutex_unlock(&pmac_backlight_mutex);
+#endif
+}
+#else
+static inline void riva_bl_init(struct riva_par *par) {}
+static inline void riva_bl_exit(struct riva_par *par) {}
+#endif /* CONFIG_FB_RIVA_BACKLIGHT */
/* ------------------------------------------------------------------------- *
*
/* ------------------------------------------------------------------------- *
*
- * Backlight operations
- *
- * ------------------------------------------------------------------------- */
-
-#ifdef CONFIG_PMAC_BACKLIGHT
-static int riva_set_backlight_enable(int on, int level, void *data)
-{
- struct riva_par *par = data;
- U032 tmp_pcrt, tmp_pmc;
-
- tmp_pmc = par->riva.PMC[0x10F0/4] & 0x0000FFFF;
- tmp_pcrt = par->riva.PCRTC0[0x081C/4] & 0xFFFFFFFC;
- if(on && (level > BACKLIGHT_OFF)) {
- tmp_pcrt |= 0x1;
- tmp_pmc |= (1 << 31); // backlight bit
- tmp_pmc |= riva_backlight_levels[level-1] << 16; // level
- }
- par->riva.PCRTC0[0x081C/4] = tmp_pcrt;
- par->riva.PMC[0x10F0/4] = tmp_pmc;
- return 0;
-}
-
-static int riva_set_backlight_level(int level, void *data)
-{
- return riva_set_backlight_enable(1, level, data);
-}
-#endif /* CONFIG_PMAC_BACKLIGHT */
-
-/* ------------------------------------------------------------------------- *
- *
* framebuffer operations
*
* ------------------------------------------------------------------------- */
SEQout(par, 0x01, tmp);
CRTCout(par, 0x1a, vesa);
-#ifdef CONFIG_PMAC_BACKLIGHT
- if ( par->FlatPanel && machine_is(powermac)) {
- set_backlight_enable(!blank);
+#ifdef CONFIG_FB_RIVA_BACKLIGHT
+ mutex_lock(&info->bl_mutex);
+ if (info->bl_dev) {
+ down(&info->bl_dev->sem);
+ info->bl_dev->props->power = blank;
+ info->bl_dev->props->update_status(info->bl_dev);
+ up(&info->bl_dev->sem);
}
+ mutex_unlock(&info->bl_mutex);
#endif
NVTRACE_LEAVE();
RIVAFB_VERSION,
info->fix.smem_len / (1024 * 1024),
info->fix.smem_start);
-#ifdef CONFIG_PMAC_BACKLIGHT
- if (default_par->FlatPanel && machine_is(powermac))
- register_backlight_controller(&riva_backlight_controller,
- default_par, "mnca");
-#endif
+
+ riva_bl_init(info->par);
+
NVTRACE_LEAVE();
return 0;
NVTRACE_ENTER();
+ riva_bl_exit(par);
+
#ifdef CONFIG_FB_RIVA_I2C
riva_delete_i2c_busses(par);
kfree(par->EDID);
* 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
#ifndef _LINUX_FB_H
#define _LINUX_FB_H
+#include <linux/backlight.h>
#include <asm/types.h>
/* Definitions of frame buffers */
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>
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 */
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
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__ */
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff