diff options
Diffstat (limited to 'drivers/acpi/video.c')
| -rw-r--r-- | drivers/acpi/video.c | 2726 |
1 files changed, 1421 insertions, 1305 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 12fb44f1676..350d52a8f78 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -1,5 +1,5 @@ /* - * video.c - ACPI Video Driver ($Revision:$) + * video.c - ACPI Video Driver * * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> @@ -30,19 +30,21 @@ #include <linux/types.h> #include <linux/list.h> #include <linux/mutex.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> #include <linux/input.h> #include <linux/backlight.h> #include <linux/thermal.h> -#include <linux/video_output.h> +#include <linux/sort.h> +#include <linux/pci.h> +#include <linux/pci_ids.h> +#include <linux/slab.h> +#include <linux/dmi.h> +#include <linux/suspend.h> +#include <linux/acpi.h> +#include <acpi/video.h> #include <asm/uaccess.h> -#include <acpi/acpi_bus.h> -#include <acpi/acpi_drivers.h> +#include "internal.h" -#define ACPI_VIDEO_COMPONENT 0x08000000 -#define ACPI_VIDEO_CLASS "video" #define ACPI_VIDEO_BUS_NAME "Video Bus" #define ACPI_VIDEO_DEVICE_NAME "Video Device" #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 @@ -57,15 +59,8 @@ #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 -#define ACPI_VIDEO_HEAD_INVALID (~0u - 1) -#define ACPI_VIDEO_HEAD_END (~0u) #define MAX_NAME_LEN 20 -#define ACPI_VIDEO_DISPLAY_CRT 1 -#define ACPI_VIDEO_DISPLAY_TV 2 -#define ACPI_VIDEO_DISPLAY_DVI 3 -#define ACPI_VIDEO_DISPLAY_LCD 4 - #define _COMPONENT ACPI_VIDEO_COMPONENT ACPI_MODULE_NAME("video"); @@ -73,12 +68,30 @@ MODULE_AUTHOR("Bruno Ducrot"); MODULE_DESCRIPTION("ACPI Video Driver"); MODULE_LICENSE("GPL"); -static int brightness_switch_enabled = 1; +static bool brightness_switch_enabled = 1; module_param(brightness_switch_enabled, bool, 0644); +/* + * By default, we don't allow duplicate ACPI video bus devices + * under the same VGA controller + */ +static bool allow_duplicates; +module_param(allow_duplicates, bool, 0644); + +/* + * For Windows 8 systems: used to decide if video module + * should skip registering backlight interface of its own. + */ +static int use_native_backlight_param = 1; +module_param_named(use_native_backlight, use_native_backlight_param, int, 0444); +static bool use_native_backlight_dmi = false; + +static int register_count; +static struct mutex video_list_lock; +static struct list_head video_bus_head; static int acpi_video_bus_add(struct acpi_device *device); -static int acpi_video_bus_remove(struct acpi_device *device, int type); -static int acpi_video_resume(struct acpi_device *device); +static int acpi_video_bus_remove(struct acpi_device *device); +static void acpi_video_bus_notify(struct acpi_device *device, u32 event); static const struct acpi_device_id video_device_ids[] = { {ACPI_VIDEO_HID, 0}, @@ -93,7 +106,7 @@ static struct acpi_driver acpi_video_bus = { .ops = { .add = acpi_video_bus_add, .remove = acpi_video_bus_remove, - .resume = acpi_video_resume, + .notify = acpi_video_bus_notify, }, }; @@ -105,26 +118,26 @@ struct acpi_video_bus_flags { }; struct acpi_video_bus_cap { - u8 _DOS:1; /*Enable/Disable output switching */ - u8 _DOD:1; /*Enumerate all devices attached to display adapter */ - u8 _ROM:1; /*Get ROM Data */ - u8 _GPD:1; /*Get POST Device */ - u8 _SPD:1; /*Set POST Device */ - u8 _VPO:1; /*Video POST Options */ + u8 _DOS:1; /* Enable/Disable output switching */ + u8 _DOD:1; /* Enumerate all devices attached to display adapter */ + u8 _ROM:1; /* Get ROM Data */ + u8 _GPD:1; /* Get POST Device */ + u8 _SPD:1; /* Set POST Device */ + u8 _VPO:1; /* Video POST Options */ u8 reserved:2; }; struct acpi_video_device_attrib { u32 display_index:4; /* A zero-based instance of the Display */ - u32 display_port_attachment:4; /*This field differentiates the display type */ - u32 display_type:4; /*Describe the specific type in use */ - u32 vendor_specific:4; /*Chipset Vendor Specific */ - u32 bios_can_detect:1; /*BIOS can detect the device */ - u32 depend_on_vga:1; /*Non-VGA output device whose power is related to + u32 display_port_attachment:4; /* This field differentiates the display type */ + u32 display_type:4; /* Describe the specific type in use */ + u32 vendor_specific:4; /* Chipset Vendor Specific */ + u32 bios_can_detect:1; /* BIOS can detect the device */ + u32 depend_on_vga:1; /* Non-VGA output device whose power is related to the VGA device. */ - u32 pipe_id:3; /*For VGA multiple-head devices. */ - u32 reserved:10; /*Must be 0 */ - u32 device_id_scheme:1; /*Device ID Scheme */ + u32 pipe_id:3; /* For VGA multiple-head devices. */ + u32 reserved:10; /* Must be 0 */ + u32 device_id_scheme:1; /* Device ID Scheme */ }; struct acpi_video_enumerated_device { @@ -137,6 +150,8 @@ struct acpi_video_enumerated_device { struct acpi_video_bus { struct acpi_device *device; + bool backlight_registered; + bool backlight_notifier_registered; u8 dos_setting; struct acpi_video_enumerated_device *attached_array; u8 attached_count; @@ -144,9 +159,11 @@ struct acpi_video_bus { struct acpi_video_bus_flags flags; struct list_head video_device_list; struct mutex device_list_lock; /* protects video_device_list */ - struct proc_dir_entry *dir; + struct list_head entry; struct input_dev *input; char phys[32]; /* for input device */ + struct notifier_block pm_nb; + struct notifier_block backlight_nb; }; struct acpi_video_device_flags { @@ -156,24 +173,30 @@ struct acpi_video_device_flags { u8 dvi:1; u8 bios:1; u8 unknown:1; - u8 reserved:2; + u8 notify:1; + u8 reserved:1; }; struct acpi_video_device_cap { - u8 _ADR:1; /*Return the unique ID */ - u8 _BCL:1; /*Query list of brightness control levels supported */ - u8 _BCM:1; /*Set the brightness level */ + u8 _ADR:1; /* Return the unique ID */ + u8 _BCL:1; /* Query list of brightness control levels supported */ + u8 _BCM:1; /* Set the brightness level */ u8 _BQC:1; /* Get current brightness level */ - u8 _DDC:1; /*Return the EDID for this device */ - u8 _DCS:1; /*Return status of output device */ - u8 _DGS:1; /*Query graphics state */ - u8 _DSS:1; /*Device state set */ + u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ + u8 _DDC:1; /* Return the EDID for this device */ +}; + +struct acpi_video_brightness_flags { + u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ + u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ + u8 _BQC_use_index:1; /* _BQC returns an index value */ }; struct acpi_video_device_brightness { int curr; int count; int *levels; + struct acpi_video_brightness_flags flags; }; struct acpi_video_device { @@ -185,90 +208,10 @@ struct acpi_video_device { struct acpi_device *dev; struct acpi_video_device_brightness *brightness; struct backlight_device *backlight; - struct thermal_cooling_device *cdev; - struct output_device *output_dev; -}; - -/* bus */ -static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file); -static struct file_operations acpi_video_bus_info_fops = { - .open = acpi_video_bus_info_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file); -static struct file_operations acpi_video_bus_ROM_fops = { - .open = acpi_video_bus_ROM_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int acpi_video_bus_POST_info_open_fs(struct inode *inode, - struct file *file); -static struct file_operations acpi_video_bus_POST_info_fops = { - .open = acpi_video_bus_POST_info_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file); -static struct file_operations acpi_video_bus_POST_fops = { - .open = acpi_video_bus_POST_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file); -static struct file_operations acpi_video_bus_DOS_fops = { - .open = acpi_video_bus_DOS_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -/* device */ -static int acpi_video_device_info_open_fs(struct inode *inode, - struct file *file); -static struct file_operations acpi_video_device_info_fops = { - .open = acpi_video_device_info_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int acpi_video_device_state_open_fs(struct inode *inode, - struct file *file); -static struct file_operations acpi_video_device_state_fops = { - .open = acpi_video_device_state_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int acpi_video_device_brightness_open_fs(struct inode *inode, - struct file *file); -static struct file_operations acpi_video_device_brightness_fops = { - .open = acpi_video_device_brightness_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int acpi_video_device_EDID_open_fs(struct inode *inode, - struct file *file); -static struct file_operations acpi_video_device_EDID_fops = { - .open = acpi_video_device_EDID_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, + struct thermal_cooling_device *cooling_dev; }; -static char device_decode[][30] = { +static const char device_decode[][30] = { "motherboard VGA device", "PCI VGA device", "AGP VGA device", @@ -284,159 +227,119 @@ static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level); static int acpi_video_device_lcd_get_level_current( struct acpi_video_device *device, - unsigned long *level); + unsigned long long *level, bool raw); static int acpi_video_get_next_level(struct acpi_video_device *device, u32 level_current, u32 event); -static void acpi_video_switch_brightness(struct acpi_video_device *device, +static int acpi_video_switch_brightness(struct acpi_video_device *device, int event); -static int acpi_video_device_get_state(struct acpi_video_device *device, - unsigned long *state); -static int acpi_video_output_get(struct output_device *od); -static int acpi_video_device_set_state(struct acpi_video_device *device, int state); -/*backlight device sysfs support*/ +static bool acpi_video_use_native_backlight(void) +{ + if (use_native_backlight_param != -1) + return use_native_backlight_param; + else + return use_native_backlight_dmi; +} + +bool acpi_video_verify_backlight_support(void) +{ + if (acpi_osi_is_win8() && acpi_video_use_native_backlight() && + backlight_device_registered(BACKLIGHT_RAW)) + return false; + return acpi_video_backlight_support(); +} +EXPORT_SYMBOL_GPL(acpi_video_verify_backlight_support); + +/* backlight device sysfs support */ static int acpi_video_get_brightness(struct backlight_device *bd) { - unsigned long cur_level; + unsigned long long cur_level; int i; - struct acpi_video_device *vd = - (struct acpi_video_device *)bl_get_data(bd); - acpi_video_device_lcd_get_level_current(vd, &cur_level); + struct acpi_video_device *vd = bl_get_data(bd); + + if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) + return -EINVAL; for (i = 2; i < vd->brightness->count; i++) { if (vd->brightness->levels[i] == cur_level) - /* The first two entries are special - see page 575 - of the ACPI spec 3.0 */ - return i-2; + /* + * The first two entries are special - see page 575 + * of the ACPI spec 3.0 + */ + return i - 2; } return 0; } static int acpi_video_set_brightness(struct backlight_device *bd) { - int request_level = bd->props.brightness+2; - struct acpi_video_device *vd = - (struct acpi_video_device *)bl_get_data(bd); - acpi_video_device_lcd_set_level(vd, - vd->brightness->levels[request_level]); - return 0; + int request_level = bd->props.brightness + 2; + struct acpi_video_device *vd = bl_get_data(bd); + + return acpi_video_device_lcd_set_level(vd, + vd->brightness->levels[request_level]); } -static struct backlight_ops acpi_backlight_ops = { +static const struct backlight_ops acpi_backlight_ops = { .get_brightness = acpi_video_get_brightness, .update_status = acpi_video_set_brightness, }; -/*video output device sysfs support*/ -static int acpi_video_output_get(struct output_device *od) -{ - unsigned long state; - struct acpi_video_device *vd = - (struct acpi_video_device *)dev_get_drvdata(&od->dev); - acpi_video_device_get_state(vd, &state); - return (int)state; -} - -static int acpi_video_output_set(struct output_device *od) -{ - unsigned long state = od->request_state; - struct acpi_video_device *vd= - (struct acpi_video_device *)dev_get_drvdata(&od->dev); - return acpi_video_device_set_state(vd, state); -} - -static struct output_properties acpi_output_properties = { - .set_state = acpi_video_output_set, - .get_status = acpi_video_output_get, -}; - - /* thermal cooling device callbacks */ -static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf) +static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned + long *state) { - struct acpi_device *device = cdev->devdata; + struct acpi_device *device = cooling_dev->devdata; struct acpi_video_device *video = acpi_driver_data(device); - return sprintf(buf, "%d\n", video->brightness->count - 3); + *state = video->brightness->count - 3; + return 0; } -static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf) +static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned + long *state) { - struct acpi_device *device = cdev->devdata; + struct acpi_device *device = cooling_dev->devdata; struct acpi_video_device *video = acpi_driver_data(device); - unsigned long level; - int state; + unsigned long long level; + int offset; - acpi_video_device_lcd_get_level_current(video, &level); - for (state = 2; state < video->brightness->count; state++) - if (level == video->brightness->levels[state]) - return sprintf(buf, "%d\n", - video->brightness->count - state - 1); + if (acpi_video_device_lcd_get_level_current(video, &level, false)) + return -EINVAL; + for (offset = 2; offset < video->brightness->count; offset++) + if (level == video->brightness->levels[offset]) { + *state = video->brightness->count - offset - 1; + return 0; + } return -EINVAL; } static int -video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state) +video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) { - struct acpi_device *device = cdev->devdata; + struct acpi_device *device = cooling_dev->devdata; struct acpi_video_device *video = acpi_driver_data(device); int level; - if ( state >= video->brightness->count - 2) + if (state >= video->brightness->count - 2) return -EINVAL; state = video->brightness->count - state; - level = video->brightness->levels[state -1]; + level = video->brightness->levels[state - 1]; return acpi_video_device_lcd_set_level(video, level); } -static struct thermal_cooling_device_ops video_cooling_ops = { +static const struct thermal_cooling_device_ops video_cooling_ops = { .get_max_state = video_get_max_state, .get_cur_state = video_get_cur_state, .set_cur_state = video_set_cur_state, }; -/* -------------------------------------------------------------------------- - Video Management - -------------------------------------------------------------------------- */ - -/* device */ - -static int -acpi_video_device_query(struct acpi_video_device *device, unsigned long *state) -{ - int status; - - status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state); - - return status; -} - -static int -acpi_video_device_get_state(struct acpi_video_device *device, - unsigned long *state) -{ - int status; - - status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state); - - return status; -} - -static int -acpi_video_device_set_state(struct acpi_video_device *device, int state) -{ - int status; - union acpi_object arg0 = { ACPI_TYPE_INTEGER }; - struct acpi_object_list args = { 1, &arg0 }; - unsigned long ret; - - - arg0.integer.value = state; - status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret); - - return status; -} +/* + * -------------------------------------------------------------------------- + * Video Management + * -------------------------------------------------------------------------- + */ static int acpi_video_device_lcd_query_levels(struct acpi_video_device *device, @@ -463,7 +366,7 @@ acpi_video_device_lcd_query_levels(struct acpi_video_device *device, return 0; - err: +err: kfree(buffer.pointer); return status; @@ -472,29 +375,357 @@ acpi_video_device_lcd_query_levels(struct acpi_video_device *device, static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) { - int status = AE_OK; - union acpi_object arg0 = { ACPI_TYPE_INTEGER }; - struct acpi_object_list args = { 1, &arg0 }; - + int status; + int state; - arg0.integer.value = level; + status = acpi_execute_simple_method(device->dev->handle, + "_BCM", level); + if (ACPI_FAILURE(status)) { + ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); + return -EIO; + } - if (device->cap._BCM) - status = acpi_evaluate_object(device->dev->handle, "_BCM", - &args, NULL); device->brightness->curr = level; - return status; + for (state = 2; state < device->brightness->count; state++) + if (level == device->brightness->levels[state]) { + if (device->backlight) + device->backlight->props.brightness = state - 2; + return 0; + } + + ACPI_ERROR((AE_INFO, "Current brightness invalid")); + return -EINVAL; +} + +/* + * For some buggy _BQC methods, we need to add a constant value to + * the _BQC return value to get the actual current brightness level + */ + +static int bqc_offset_aml_bug_workaround; +static int __init video_set_bqc_offset(const struct dmi_system_id *d) +{ + bqc_offset_aml_bug_workaround = 9; + return 0; +} + +static int __init video_set_use_native_backlight(const struct dmi_system_id *d) +{ + use_native_backlight_dmi = true; + return 0; +} + +static struct dmi_system_id video_dmi_table[] __initdata = { + /* + * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 + */ + { + .callback = video_set_bqc_offset, + .ident = "Acer Aspire 5720", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), + }, + }, + { + .callback = video_set_bqc_offset, + .ident = "Acer Aspire 5710Z", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), + }, + }, + { + .callback = video_set_bqc_offset, + .ident = "eMachines E510", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), + DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), + }, + }, + { + .callback = video_set_bqc_offset, + .ident = "Acer Aspire 5315", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), + }, + }, + { + .callback = video_set_bqc_offset, + .ident = "Acer Aspire 7720", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "ThinkPad T430 and T430s", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "ThinkPad X230", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "ThinkPad W530", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W530"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "ThinkPad X1 Carbon", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Lenovo Yoga 13", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Lenovo Yoga 2 11", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2 11"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Thinkpad Helix", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Dell Inspiron 7520", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Acer Aspire 5733Z", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5733Z"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Acer Aspire 5742G", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5742G"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Acer Aspire V5-171", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "V5-171"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Acer Aspire V5-431", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-431"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Acer Aspire V5-471G", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-471G"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "Acer TravelMate B113", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate B113"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "HP ProBook 4340s", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4340s"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "HP ProBook 4540s", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4540s"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "HP ProBook 2013 models", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook "), + DMI_MATCH(DMI_PRODUCT_NAME, " G1"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "HP EliteBook 2013 models", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "), + DMI_MATCH(DMI_PRODUCT_NAME, " G1"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "HP ZBook 14", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 14"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "HP ZBook 15", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 15"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "HP ZBook 17", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 17"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "HP EliteBook 8470p", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8470p"), + }, + }, + { + .callback = video_set_use_native_backlight, + .ident = "HP EliteBook 8780w", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"), + }, + }, + {} +}; + +static unsigned long long +acpi_video_bqc_value_to_level(struct acpi_video_device *device, + unsigned long long bqc_value) +{ + unsigned long long level; + + if (device->brightness->flags._BQC_use_index) { + /* + * _BQC returns an index that doesn't account for + * the first 2 items with special meaning, so we need + * to compensate for that by offsetting ourselves + */ + if (device->brightness->flags._BCL_reversed) + bqc_value = device->brightness->count - 3 - bqc_value; + + level = device->brightness->levels[bqc_value + 2]; + } else { + level = bqc_value; + } + + level += bqc_offset_aml_bug_workaround; + + return level; } static int acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, - unsigned long *level) + unsigned long long *level, bool raw) { - if (device->cap._BQC) - return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL, - level); + acpi_status status = AE_OK; + int i; + + if (device->cap._BQC || device->cap._BCQ) { + char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; + + status = acpi_evaluate_integer(device->dev->handle, buf, + NULL, level); + if (ACPI_SUCCESS(status)) { + if (raw) { + /* + * Caller has indicated he wants the raw + * value returned by _BQC, so don't furtherly + * mess with the value. + */ + return 0; + } + + *level = acpi_video_bqc_value_to_level(device, *level); + + for (i = 2; i < device->brightness->count; i++) + if (device->brightness->levels[i] == *level) { + device->brightness->curr = *level; + return 0; + } + /* + * BQC returned an invalid level. + * Stop using it. + */ + ACPI_WARNING((AE_INFO, + "%s returned an invalid level", + buf)); + device->cap._BQC = device->cap._BCQ = 0; + } else { + /* + * Fixme: + * should we return an error or ignore this failure? + * dev->brightness->curr is a cached value which stores + * the correct current backlight level in most cases. + * ACPI video backlight still works w/ buggy _BQC. + * http://bugzilla.kernel.org/show_bug.cgi?id=12233 + */ + ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); + device->cap._BQC = device->cap._BCQ = 0; + } + } + *level = device->brightness->curr; - return AE_OK; + return 0; } static int @@ -538,50 +769,10 @@ acpi_video_device_EDID(struct acpi_video_device *device, /* bus */ -static int -acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option) -{ - int status; - unsigned long tmp; - union acpi_object arg0 = { ACPI_TYPE_INTEGER }; - struct acpi_object_list args = { 1, &arg0 }; - - - arg0.integer.value = option; - - status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp); - if (ACPI_SUCCESS(status)) - status = tmp ? (-EINVAL) : (AE_OK); - - return status; -} - -static int -acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id) -{ - int status; - - status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id); - - return status; -} - -static int -acpi_video_bus_POST_options(struct acpi_video_bus *video, - unsigned long *options) -{ - int status; - - status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options); - *options &= 3; - - return status; -} - /* * Arg: - * video : video bus device pointer - * bios_flag : + * video : video bus device pointer + * bios_flag : * 0. The system BIOS should NOT automatically switch(toggle) * the active display output. * 1. The system BIOS should automatically switch (toggle) the @@ -593,210 +784,295 @@ acpi_video_bus_POST_options(struct acpi_video_bus *video, * lcd_flag : * 0. The system BIOS should automatically control the brightness level * of the LCD when the power changes from AC to DC - * 1. The system BIOS should NOT automatically control the brightness + * 1. The system BIOS should NOT automatically control the brightness * level of the LCD when the power changes from AC to DC. - * Return Value: - * -1 wrong arg. + * Return Value: + * -EINVAL wrong arg. */ static int acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) { - acpi_integer status = 0; - union acpi_object arg0 = { ACPI_TYPE_INTEGER }; - struct acpi_object_list args = { 1, &arg0 }; + acpi_status status; + + if (!video->cap._DOS) + return 0; + + if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) + return -EINVAL; + video->dos_setting = (lcd_flag << 2) | bios_flag; + status = acpi_execute_simple_method(video->device->handle, "_DOS", + (lcd_flag << 2) | bios_flag); + if (ACPI_FAILURE(status)) + return -EIO; + + return 0; +} +/* + * Simple comparison function used to sort backlight levels. + */ + +static int +acpi_video_cmp_level(const void *a, const void *b) +{ + return *(int *)a - *(int *)b; +} + +/* + * Decides if _BQC/_BCQ for this system is usable + * + * We do this by changing the level first and then read out the current + * brightness level, if the value does not match, find out if it is using + * index. If not, clear the _BQC/_BCQ capability. + */ +static int acpi_video_bqc_quirk(struct acpi_video_device *device, + int max_level, int current_level) +{ + struct acpi_video_device_brightness *br = device->brightness; + int result; + unsigned long long level; + int test_level; - if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) { - status = -1; - goto Failed; + /* don't mess with existing known broken systems */ + if (bqc_offset_aml_bug_workaround) + return 0; + + /* + * Some systems always report current brightness level as maximum + * through _BQC, we need to test another value for them. + */ + test_level = current_level == max_level ? br->levels[3] : max_level; + + result = acpi_video_device_lcd_set_level(device, test_level); + if (result) + return result; + + result = acpi_video_device_lcd_get_level_current(device, &level, true); + if (result) + return result; + + if (level != test_level) { + /* buggy _BQC found, need to find out if it uses index */ + if (level < br->count) { + if (br->flags._BCL_reversed) + level = br->count - 3 - level; + if (br->levels[level + 2] == test_level) + br->flags._BQC_use_index = 1; + } + + if (!br->flags._BQC_use_index) + device->cap._BQC = device->cap._BCQ = 0; } - arg0.integer.value = (lcd_flag << 2) | bios_flag; - video->dos_setting = arg0.integer.value; - acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL); - Failed: - return status; + return 0; } + /* - * Arg: - * device : video output device (LCD, CRT, ..) + * Arg: + * device : video output device (LCD, CRT, ..) * * Return Value: - * None + * Maximum brightness level * - * Find out all required AML methods defined under the output - * device. + * Allocate and initialize device->brightness. */ -static void acpi_video_device_find_cap(struct acpi_video_device *device) +static int +acpi_video_init_brightness(struct acpi_video_device *device) { - acpi_handle h_dummy1; - int i; - u32 max_level = 0; union acpi_object *obj = NULL; + int i, max_level = 0, count = 0, level_ac_battery = 0; + unsigned long long level, level_old; + union acpi_object *o; struct acpi_video_device_brightness *br = NULL; + int result = -EINVAL; + u32 value; + if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " + "LCD brightness level\n")); + goto out; + } - memset(&device->cap, 0, sizeof(device->cap)); + if (obj->package.count < 2) + goto out; - if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { - device->cap._ADR = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) { - device->cap._BCL = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) { - device->cap._BCM = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1))) - device->cap._BQC = 1; - if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { - device->cap._DDC = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) { - device->cap._DCS = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) { - device->cap._DGS = 1; + br = kzalloc(sizeof(*br), GFP_KERNEL); + if (!br) { + printk(KERN_ERR "can't allocate memory\n"); + result = -ENOMEM; + goto out; } - if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) { - device->cap._DSS = 1; + + br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), + GFP_KERNEL); + if (!br->levels) { + result = -ENOMEM; + goto out_free; } - if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { - - if (obj->package.count >= 2) { - int count = 0; - union acpi_object *o; - - br = kzalloc(sizeof(*br), GFP_KERNEL); - if (!br) { - printk(KERN_ERR "can't allocate memory\n"); - } else { - br->levels = kmalloc(obj->package.count * - sizeof *(br->levels), GFP_KERNEL); - if (!br->levels) - goto out; - - for (i = 0; i < obj->package.count; i++) { - o = (union acpi_object *)&obj->package. - elements[i]; - if (o->type != ACPI_TYPE_INTEGER) { - printk(KERN_ERR PREFIX "Invalid data\n"); - continue; - } - br->levels[count] = (u32) o->integer.value; - - if (br->levels[count] > max_level) - max_level = br->levels[count]; - count++; - } - out: - if (count < 2) { - kfree(br->levels); - kfree(br); - } else { - br->count = count; - device->brightness = br; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "found %d brightness levels\n", - count)); - } - } + for (i = 0; i < obj->package.count; i++) { + o = (union acpi_object *)&obj->package.elements[i]; + if (o->type != ACPI_TYPE_INTEGER) { + printk(KERN_ERR PREFIX "Invalid data\n"); + continue; } + value = (u32) o->integer.value; + /* Skip duplicate entries */ + if (count > 2 && br->levels[count - 1] == value) + continue; - } else { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n")); + br->levels[count] = value; + + if (br->levels[count] > max_level) + max_level = br->levels[count]; + count++; } + /* + * some buggy BIOS don't export the levels + * when machine is on AC/Battery in _BCL package. + * In this case, the first two elements in _BCL packages + * are also supported brightness levels that OS should take care of. + */ + for (i = 2; i < count; i++) { + if (br->levels[i] == br->levels[0]) + level_ac_battery++; + if (br->levels[i] == br->levels[1]) + level_ac_battery++; + } + + if (level_ac_battery < 2) { + level_ac_battery = 2 - level_ac_battery; + br->flags._BCL_no_ac_battery_levels = 1; + for (i = (count - 1 + level_ac_battery); i >= 2; i--) + br->levels[i] = br->levels[i - level_ac_battery]; + count += level_ac_battery; + } else if (level_ac_battery > 2) + ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); + + /* Check if the _BCL package is in a reversed order */ + if (max_level == br->levels[2]) { + br->flags._BCL_reversed = 1; + sort(&br->levels[2], count - 2, sizeof(br->levels[2]), + acpi_video_cmp_level, NULL); + } else if (max_level != br->levels[count - 1]) + ACPI_ERROR((AE_INFO, + "Found unordered _BCL package")); + + br->count = count; + device->brightness = br; + + /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ + br->curr = level = max_level; + + if (!device->cap._BQC) + goto set_level; + + result = acpi_video_device_lcd_get_level_current(device, + &level_old, true); + if (result) + goto out_free_levels; + + result = acpi_video_bqc_quirk(device, max_level, level_old); + if (result) + goto out_free_levels; + /* + * cap._BQC may get cleared due to _BQC is found to be broken + * in acpi_video_bqc_quirk, so check again here. + */ + if (!device->cap._BQC) + goto set_level; + + level = acpi_video_bqc_value_to_level(device, level_old); + /* + * On some buggy laptops, _BQC returns an uninitialized + * value when invoked for the first time, i.e. + * level_old is invalid (no matter whether it's a level + * or an index). Set the backlight to max_level in this case. + */ + for (i = 2; i < br->count; i++) + if (level == br->levels[i]) + break; + if (i == br->count || !level) + level = max_level; + +set_level: + result = acpi_video_device_lcd_set_level(device, level); + if (result) + goto out_free_levels; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "found %d brightness levels\n", count - 2)); kfree(obj); + return result; + +out_free_levels: + kfree(br->levels); +out_free: + kfree(br); +out: + device->brightness = NULL; + kfree(obj); + return result; +} - if (device->cap._BCL && device->cap._BCM && max_level > 0) { - int result; - static int count = 0; - char *name; - name = kzalloc(MAX_NAME_LEN, GFP_KERNEL); - if (!name) - return; - - sprintf(name, "acpi_video%d", count++); - device->backlight = backlight_device_register(name, - NULL, device, &acpi_backlight_ops); - device->backlight->props.max_brightness = device->brightness->count-3; - device->backlight->props.brightness = acpi_video_get_brightness(device->backlight); - backlight_update_status(device->backlight); - kfree(name); - - device->cdev = thermal_cooling_device_register("LCD", - device->dev, &video_cooling_ops); - if (IS_ERR(device->cdev)) - return; - - if (device->cdev) { - printk(KERN_INFO PREFIX - "%s is registered as cooling_device%d\n", - device->dev->dev.bus_id, device->cdev->id); - result = sysfs_create_link(&device->dev->dev.kobj, - &device->cdev->device.kobj, - "thermal_cooling"); - if (result) - printk(KERN_ERR PREFIX "Create sysfs link\n"); - result = sysfs_create_link(&device->cdev->device.kobj, - &device->dev->dev.kobj, - "device"); - if (result) - printk(KERN_ERR PREFIX "Create sysfs link\n"); - } - } - if (device->cap._DCS && device->cap._DSS){ - static int count = 0; - char *name; - name = kzalloc(MAX_NAME_LEN, GFP_KERNEL); - if (!name) - return; - sprintf(name, "acpi_video%d", count++); - device->output_dev = video_output_register(name, - NULL, device, &acpi_output_properties); - kfree(name); +/* + * Arg: + * device : video output device (LCD, CRT, ..) + * + * Return Value: + * None + * + * Find out all required AML methods defined under the output + * device. + */ + +static void acpi_video_device_find_cap(struct acpi_video_device *device) +{ + if (acpi_has_method(device->dev->handle, "_ADR")) + device->cap._ADR = 1; + if (acpi_has_method(device->dev->handle, "_BCL")) + device->cap._BCL = 1; + if (acpi_has_method(device->dev->handle, "_BCM")) + device->cap._BCM = 1; + if (acpi_has_method(device->dev->handle, "_BQC")) { + device->cap._BQC = 1; + } else if (acpi_has_method(device->dev->handle, "_BCQ")) { + printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); + device->cap._BCQ = 1; } - return; + + if (acpi_has_method(device->dev->handle, "_DDC")) + device->cap._DDC = 1; } /* - * Arg: - * device : video output device (VGA) + * Arg: + * device : video output device (VGA) * * Return Value: - * None + * None * * Find out all required AML methods defined under the video bus device. */ static void acpi_video_bus_find_cap(struct acpi_video_bus *video) { - acpi_handle h_dummy1; - - memset(&video->cap, 0, sizeof(video->cap)); - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { + if (acpi_has_method(video->device->handle, "_DOS")) video->cap._DOS = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { + if (acpi_has_method(video->device->handle, "_DOD")) video->cap._DOD = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { + if (acpi_has_method(video->device->handle, "_ROM")) video->cap._ROM = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { + if (acpi_has_method(video->device->handle, "_GPD")) video->cap._GPD = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { + if (acpi_has_method(video->device->handle, "_SPD")) video->cap._SPD = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) { + if (acpi_has_method(video->device->handle, "_VPO")) video->cap._VPO = 1; - } } /* @@ -807,17 +1083,28 @@ static void acpi_video_bus_find_cap(struct acpi_video_bus *video) static int acpi_video_bus_check(struct acpi_video_bus *video) { acpi_status status = -ENOENT; - + struct pci_dev *dev; if (!video) return -EINVAL; - /* Since there is no HID, CID and so on for VGA driver, we have + dev = acpi_get_pci_dev(video->device->handle); + if (!dev) + return -ENODEV; + pci_dev_put(dev); + + /* + * Since there is no HID, CID and so on for VGA driver, we have * to check well known required nodes. */ /* Does this device support video switching? */ - if (video->cap._DOS) { + if (video->cap._DOS || video->cap._DOD) { + if (!video->cap._DOS) { + printk(KERN_WARNING FW_BUG + "ACPI(%s) defines _DOD but not _DOS\n", + acpi_device_bid(video->device)); + } video->flags.multihead = 1; status = 0; } @@ -837,707 +1124,130 @@ static int acpi_video_bus_check(struct acpi_video_bus *video) return status; } -/* -------------------------------------------------------------------------- - FS Interface (/proc) - -------------------------------------------------------------------------- */ - -static struct proc_dir_entry *acpi_video_dir; - -/* video devices */ - -static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset) -{ - struct acpi_video_device *dev = seq->private; - - - if (!dev) - goto end; - - seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id); - seq_printf(seq, "type: "); - if (dev->flags.crt) - seq_printf(seq, "CRT\n"); - else if (dev->flags.lcd) - seq_printf(seq, "LCD\n"); - else if (dev->flags.tvout) - seq_printf(seq, "TVOUT\n"); - else if (dev->flags.dvi) - seq_printf(seq, "DVI\n"); - else - seq_printf(seq, "UNKNOWN\n"); - - seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no"); - - end: - return 0; -} - -static int -acpi_video_device_info_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_video_device_info_seq_show, - PDE(inode)->data); -} - -static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset) -{ - int status; - struct acpi_video_device *dev = seq->private; - unsigned long state; - - - if (!dev) - goto end; - - status = acpi_video_device_get_state(dev, &state); - seq_printf(seq, "state: "); - if (ACPI_SUCCESS(status)) - seq_printf(seq, "0x%02lx\n", state); - else - seq_printf(seq, "<not supported>\n"); - - status = acpi_video_device_query(dev, &state); - seq_printf(seq, "query: "); - if (ACPI_SUCCESS(status)) - seq_printf(seq, "0x%02lx\n", state); - else - seq_printf(seq, "<not supported>\n"); - - end: - return 0; -} - -static int -acpi_video_device_state_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_video_device_state_seq_show, - PDE(inode)->data); -} - -static ssize_t -acpi_video_device_write_state(struct file *file, - const char __user * buffer, - size_t count, loff_t * data) -{ - int status; - struct seq_file *m = file->private_data; - struct acpi_video_device *dev = m->private; - char str[12] = { 0 }; - u32 state = 0; - - - if (!dev || count + 1 > sizeof str) - return -EINVAL; - - if (copy_from_user(str, buffer, count)) - return -EFAULT; - - str[count] = 0; - state = simple_strtoul(str, NULL, 0); - state &= ((1ul << 31) | (1ul << 30) | (1ul << 0)); - - status = acpi_video_device_set_state(dev, state); - - if (status) - return -EFAULT; - - return count; -} +/* + * -------------------------------------------------------------------------- + * Driver Interface + * -------------------------------------------------------------------------- + */ -static int -acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset) +/* device interface */ +static struct acpi_video_device_attrib * +acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) { - struct acpi_video_device *dev = seq->private; + struct acpi_video_enumerated_device *ids; int i; - - if (!dev || !dev->brightness) { - seq_printf(seq, "<not supported>\n"); - return 0; + for (i = 0; i < video->attached_count; i++) { + ids = &video->attached_array[i]; + if ((ids->value.int_val & 0xffff) == device_id) + return &ids->value.attrib; } - seq_printf(seq, "levels: "); - for (i = 0; i < dev->brightness->count; i++) - seq_printf(seq, " %d", dev->brightness->levels[i]); - seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr); - - return 0; + return NULL; } static int -acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_video_device_brightness_seq_show, - PDE(inode)->data); -} - -static ssize_t -acpi_video_device_write_brightness(struct file *file, - const char __user * buffer, - size_t count, loff_t * data) -{ - struct seq_file *m = file->private_data; - struct acpi_video_device *dev = m->private; - char str[5] = { 0 }; - unsigned int level = 0; - int i; - - - if (!dev || !dev->brightness || count + 1 > sizeof str) - return -EINVAL; - - if (copy_from_user(str, buffer, count)) - return -EFAULT; - - str[count] = 0; - level = simple_strtoul(str, NULL, 0); - - if (level > 100) - return -EFAULT; - - /* validate through the list of available levels */ - for (i = 0; i < dev->brightness->count; i++) - if (level == dev->brightness->levels[i]) { - if (ACPI_SUCCESS - (acpi_video_device_lcd_set_level(dev, level))) - dev->brightness->curr = level; - break; - } - - return count; -} - -static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset) +acpi_video_get_device_type(struct acpi_video_bus *video, + unsigned long device_id) { - struct acpi_video_device *dev = seq->private; - int status; + struct acpi_video_enumerated_device *ids; int i; - union acpi_object *edid = NULL; - - - if (!dev) - goto out; - - status = acpi_video_device_EDID(dev, &edid, 128); - if (ACPI_FAILURE(status)) { - status = acpi_video_device_EDID(dev, &edid, 256); - } - - if (ACPI_FAILURE(status)) { - goto out; - } - - if (edid && edid->type == ACPI_TYPE_BUFFER) { - for (i = 0; i < edid->buffer.length; i++) - seq_putc(seq, edid->buffer.pointer[i]); - } - - out: - if (!edid) - seq_printf(seq, "<not supported>\n"); - else - kfree(edid); - - return 0; -} - -static int -acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_video_device_EDID_seq_show, - PDE(inode)->data); -} - -static int acpi_video_device_add_fs(struct acpi_device *device) -{ - struct proc_dir_entry *entry = NULL; - struct acpi_video_device *vid_dev; - - - if (!device) - return -ENODEV; - - vid_dev = acpi_driver_data(device); - if (!vid_dev) - return -ENODEV; - - if (!acpi_device_dir(device)) { - acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), - vid_dev->video->dir); - if (!acpi_device_dir(device)) - return -ENODEV; - acpi_device_dir(device)->owner = THIS_MODULE; - } - - /* 'info' [R] */ - entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device)); - if (!entry) - return -ENODEV; - else { - entry->proc_fops = &acpi_video_device_info_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'state' [R/W] */ - entry = - create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR, - acpi_device_dir(device)); - if (!entry) - return -ENODEV; - else { - acpi_video_device_state_fops.write = acpi_video_device_write_state; - entry->proc_fops = &acpi_video_device_state_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'brightness' [R/W] */ - entry = - create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR, - acpi_device_dir(device)); - if (!entry) - return -ENODEV; - else { - acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness; - entry->proc_fops = &acpi_video_device_brightness_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'EDID' [R] */ - entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device)); - if (!entry) - return -ENODEV; - else { - entry->proc_fops = &acpi_video_device_EDID_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - return 0; -} - -static int acpi_video_device_remove_fs(struct acpi_device *device) -{ - struct acpi_video_device *vid_dev; - - vid_dev = acpi_driver_data(device); - if (!vid_dev || !vid_dev->video || !vid_dev->video->dir) - return -ENODEV; - - if (acpi_device_dir(device)) { - remove_proc_entry("info", acpi_device_dir(device)); - remove_proc_entry("state", acpi_device_dir(device)); - remove_proc_entry("brightness", acpi_device_dir(device)); - remove_proc_entry("EDID", acpi_device_dir(device)); - remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir); - acpi_device_dir(device) = NULL; - } - - return 0; -} - -/* video bus */ -static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset) -{ - struct acpi_video_bus *video = seq->private; - - - if (!video) - goto end; - - seq_printf(seq, "Switching heads: %s\n", - video->flags.multihead ? "yes" : "no"); - seq_printf(seq, "Video ROM: %s\n", - video->flags.rom ? "yes" : "no"); - seq_printf(seq, "Device to be POSTed on boot: %s\n", - video->flags.post ? "yes" : "no"); - - end: - return 0; -} - -static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_video_bus_info_seq_show, - PDE(inode)->data); -} - -static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset) -{ - struct acpi_video_bus *video = seq->private; - - - if (!video) - goto end; - - printk(KERN_INFO PREFIX "Please implement %s\n", __func__); - seq_printf(seq, "<TODO>\n"); - - end: - return 0; -} - -static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data); -} - -static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset) -{ - struct acpi_video_bus *video = seq->private; - unsigned long options; - int status; - - - if (!video) - goto end; - - status = acpi_video_bus_POST_options(video, &options); - if (ACPI_SUCCESS(status)) { - if (!(options & 1)) { - printk(KERN_WARNING PREFIX - "The motherboard VGA device is not listed as a possible POST device.\n"); - printk(KERN_WARNING PREFIX - "This indicates a BIOS bug. Please contact the manufacturer.\n"); - } - printk("%lx\n", options); - seq_printf(seq, "can POST: <integrated video>"); - if (options & 2) - seq_printf(seq, " <PCI video>"); - if (options & 4) - seq_printf(seq, " <AGP video>"); - seq_putc(seq, '\n'); - } else - seq_printf(seq, "<not supported>\n"); - end: - return 0; -} - -static int -acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_video_bus_POST_info_seq_show, - PDE(inode)->data); -} - -static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset) -{ - struct acpi_video_bus *video = seq->private; - int status; - unsigned long id; - - - if (!video) - goto end; - - status = acpi_video_bus_get_POST(video, &id); - if (!ACPI_SUCCESS(status)) { - seq_printf(seq, "<not supported>\n"); - goto end; - } - seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]); - end: - return 0; -} - -static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset) -{ - struct acpi_video_bus *video = seq->private; - - - seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting); - - return 0; -} - -static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_video_bus_POST_seq_show, - PDE(inode)->data); -} - -static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data); -} - -static ssize_t -acpi_video_bus_write_POST(struct file *file, - const char __user * buffer, - size_t count, loff_t * data) -{ - int status; - struct seq_file *m = file->private_data; - struct acpi_video_bus *video = m->private; - char str[12] = { 0 }; - unsigned long opt, options; - - - if (!video || count + 1 > sizeof str) - return -EINVAL; - - status = acpi_video_bus_POST_options(video, &options); - if (!ACPI_SUCCESS(status)) - return -EINVAL; - - if (copy_from_user(str, buffer, count)) - return -EFAULT; - - str[count] = 0; - opt = strtoul(str, NULL, 0); - if (opt > 3) - return -EFAULT; - - /* just in case an OEM 'forgot' the motherboard... */ - options |= 1; - - if (options & (1ul << opt)) { - status = acpi_video_bus_set_POST(video, opt); - if (!ACPI_SUCCESS(status)) - return -EFAULT; - - } - - return count; -} - -static ssize_t -acpi_video_bus_write_DOS(struct file *file, - const char __user * buffer, - size_t count, loff_t * data) -{ - int status; - struct seq_file *m = file->private_data; - struct acpi_video_bus *video = m->private; - char str[12] = { 0 }; - unsigned long opt; - - - if (!video || count + 1 > sizeof str) - return -EINVAL; - - if (copy_from_user(str, buffer, count)) - return -EFAULT; - - str[count] = 0; - opt = strtoul(str, NULL, 0); - if (opt > 7) - return -EFAULT; - - status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2); - - if (!ACPI_SUCCESS(status)) - return -EFAULT; - - return count; -} - -static int acpi_video_bus_add_fs(struct acpi_device *device) -{ - struct proc_dir_entry *entry = NULL; - struct acpi_video_bus *video; - - - video = acpi_driver_data(device); - - if (!acpi_device_dir(device)) { - acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), - acpi_video_dir); - if (!acpi_device_dir(device)) - return -ENODEV; - video->dir = acpi_device_dir(device); - acpi_device_dir(device)->owner = THIS_MODULE; - } - - /* 'info' [R] */ - entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device)); - if (!entry) - return -ENODEV; - else { - entry->proc_fops = &acpi_video_bus_info_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'ROM' [R] */ - entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device)); - if (!entry) - return -ENODEV; - else { - entry->proc_fops = &acpi_video_bus_ROM_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'POST_info' [R] */ - entry = - create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device)); - if (!entry) - return -ENODEV; - else { - entry->proc_fops = &acpi_video_bus_POST_info_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'POST' [R/W] */ - entry = - create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR, - acpi_device_dir(device)); - if (!entry) - return -ENODEV; - else { - acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST; - entry->proc_fops = &acpi_video_bus_POST_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - /* 'DOS' [R/W] */ - entry = - create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR, - acpi_device_dir(device)); - if (!entry) - return -ENODEV; - else { - acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS; - entry->proc_fops = &acpi_video_bus_DOS_fops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - return 0; -} - -static int acpi_video_bus_remove_fs(struct acpi_device *device) -{ - struct acpi_video_bus *video; - - - video = acpi_driver_data(device); - - if (acpi_device_dir(device)) { - remove_proc_entry("info", acpi_device_dir(device)); - remove_proc_entry("ROM", acpi_device_dir(device)); - remove_proc_entry("POST_info", acpi_device_dir(device)); - remove_proc_entry("POST", acpi_device_dir(device)); - remove_proc_entry("DOS", acpi_device_dir(device)); - remove_proc_entry(acpi_device_bid(device), acpi_video_dir); - acpi_device_dir(device) = NULL; + for (i = 0; i < video->attached_count; i++) { + ids = &video->attached_array[i]; + if ((ids->value.int_val & 0xffff) == device_id) + return ids->value.int_val; } return 0; } -/* -------------------------------------------------------------------------- - Driver Interface - -------------------------------------------------------------------------- */ - -/* device interface */ -static struct acpi_video_device_attrib* -acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) -{ - int count; - - for(count = 0; count < video->attached_count; count++) - if((video->attached_array[count].value.int_val & 0xffff) == device_id) - return &(video->attached_array[count].value.attrib); - return NULL; -} - static int acpi_video_bus_get_one_device(struct acpi_device *device, struct acpi_video_bus *video) { - unsigned long device_id; - int status; + unsigned long long device_id; + int status, device_type; struct acpi_video_device *data; - struct acpi_video_device_attrib* attribute; - - if (!device || !video) - return -EINVAL; + struct acpi_video_device_attrib *attribute; status = acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); - if (ACPI_SUCCESS(status)) { + /* Some device omits _ADR, we skip them instead of fail */ + if (ACPI_FAILURE(status)) + return 0; - data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); - if (!data) - return -ENOMEM; + data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); + if (!data) + return -ENOMEM; - strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); - strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); - acpi_driver_data(device) = data; + strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); + strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); + device->driver_data = data; - data->device_id = device_id; - data->video = video; - data->dev = device; + data->device_id = device_id; + data->video = video; + data->dev = device; - attribute = acpi_video_get_device_attr(video, device_id); + attribute = acpi_video_get_device_attr(video, device_id); - if((attribute != NULL) && attribute->device_id_scheme) { - switch (attribute->display_type) { - case ACPI_VIDEO_DISPLAY_CRT: - data->flags.crt = 1; - break; - case ACPI_VIDEO_DISPLAY_TV: - data->flags.tvout = 1; - break; - case ACPI_VIDEO_DISPLAY_DVI: - data->flags.dvi = 1; - break; - case ACPI_VIDEO_DISPLAY_LCD: - data->flags.lcd = 1; - break; - default: - data->flags.unknown = 1; - break; - } - if(attribute->bios_can_detect) - data->flags.bios = 1; - } else + if (attribute && attribute->device_id_scheme) { + switch (attribute->display_type) { + case ACPI_VIDEO_DISPLAY_CRT: + data->flags.crt = 1; + break; + case ACPI_VIDEO_DISPLAY_TV: + data->flags.tvout = 1; + break; + case ACPI_VIDEO_DISPLAY_DVI: + data->flags.dvi = 1; + break; + case ACPI_VIDEO_DISPLAY_LCD: + data->flags.lcd = 1; + break; + default: data->flags.unknown = 1; - - acpi_video_device_bind(video, data); - acpi_video_device_find_cap(data); - - status = acpi_install_notify_handler(device->handle, - ACPI_DEVICE_NOTIFY, - acpi_video_device_notify, - data); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error installing notify handler\n")); - if(data->brightness) - kfree(data->brightness->levels); - kfree(data->brightness); - kfree(data); - return -ENODEV; + break; } + if (attribute->bios_can_detect) + data->flags.bios = 1; + } else { + /* Check for legacy IDs */ + device_type = acpi_video_get_device_type(video, device_id); + /* Ignore bits 16 and 18-20 */ + switch (device_type & 0xffe2ffff) { + case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: + data->flags.crt = 1; + break; + case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: + data->flags.lcd = 1; + break; + case ACPI_VIDEO_DISPLAY_LEGACY_TV: + data->flags.tvout = 1; + break; + default: + data->flags.unknown = 1; + } + } - mutex_lock(&video->device_list_lock); - list_add_tail(&data->entry, &video->video_device_list); - mutex_unlock(&video->device_list_lock); - - acpi_video_device_add_fs(device); + acpi_video_device_bind(video, data); + acpi_video_device_find_cap(data); - return 0; - } + mutex_lock(&video->device_list_lock); + list_add_tail(&data->entry, &video->video_device_list); + mutex_unlock(&video->device_list_lock); - return -ENOENT; + return status; } /* * Arg: - * video : video bus device + * video : video bus device * * Return: - * none - * - * Enumerate the video device list of the video bus, + * none + * + * Enumerate the video device list of the video bus, * bind the ids with the corresponding video devices * under the video bus. */ @@ -1556,13 +1266,13 @@ static void acpi_video_device_rebind(struct acpi_video_bus *video) /* * Arg: - * video : video bus device - * device : video output device under the video - * bus + * video : video bus device + * device : video output device under the video + * bus * * Return: - * none - * + * none + * * Bind the ids with the corresponding video devices * under the video bus. */ @@ -1571,29 +1281,25 @@ static void acpi_video_device_bind(struct acpi_video_bus *video, struct acpi_video_device *device) { + struct acpi_video_enumerated_device *ids; int i; -#define IDS_VAL(i) video->attached_array[i].value.int_val -#define IDS_BIND(i) video->attached_array[i].bind_info - - for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID && - i < video->attached_count; i++) { - if (device->device_id == (IDS_VAL(i) & 0xffff)) { - IDS_BIND(i) = device; + for (i = 0; i < video->attached_count; i++) { + ids = &video->attached_array[i]; + if (device->device_id == (ids->value.int_val & 0xffff)) { + ids->bind_info = device; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); } } -#undef IDS_VAL -#undef IDS_BIND } /* * Arg: - * video : video bus device + * video : video bus device * * Return: - * < 0 : error - * + * < 0 : error + * * Call _DOD to enumerate all devices attached to display adapter * */ @@ -1603,7 +1309,7 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video) int status; int count; int i; - struct acpi_video_enumerated_device *active_device_list; + struct acpi_video_enumerated_device *active_list; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *dod = NULL; union acpi_object *obj; @@ -1624,13 +1330,10 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video) ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", dod->package.count)); - active_device_list = kmalloc((1 + - dod->package.count) * - sizeof(struct - acpi_video_enumerated_device), - GFP_KERNEL); - - if (!active_device_list) { + active_list = kcalloc(1 + dod->package.count, + sizeof(struct acpi_video_enumerated_device), + GFP_KERNEL); + if (!active_list) { status = -ENOMEM; goto out; } @@ -1640,23 +1343,24 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video) obj = &dod->package.elements[i]; if (obj->type != ACPI_TYPE_INTEGER) { - printk(KERN_ERR PREFIX "Invalid _DOD data\n"); - active_device_list[i].value.int_val = - ACPI_VIDEO_HEAD_INVALID; + printk(KERN_ERR PREFIX + "Invalid _DOD data in element %d\n", i); + continue; } - active_device_list[i].value.int_val = obj->integer.value; - active_device_list[i].bind_info = NULL; + + active_list[count].value.int_val = obj->integer.value; + active_list[count].bind_info = NULL; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, (int)obj->integer.value)); count++; } - active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END; kfree(video->attached_array); - video->attached_array = active_device_list; + video->attached_array = active_list; video->attached_count = count; - out: + +out: kfree(buffer.pointer); return status; } @@ -1669,7 +1373,7 @@ acpi_video_get_next_level(struct acpi_video_device *device, max = max_below = 0; min = min_above = 255; /* Find closest level to level_current */ - for (i = 0; i < device->brightness->count; i++) { + for (i = 2; i < device->brightness->count; i++) { l = device->brightness->levels[i]; if (abs(l - level_current) < abs(delta)) { delta = l - level_current; @@ -1679,7 +1383,7 @@ acpi_video_get_next_level(struct acpi_video_device *device, } /* Ajust level_current to closest available level */ level_current += delta; - for (i = 0; i < device->brightness->count; i++) { + for (i = 2; i < device->brightness->count; i++) { l = device->brightness->levels[i]; if (l < min) min = l; @@ -1706,121 +1410,165 @@ acpi_video_get_next_level(struct acpi_video_device *device, } } -static void +static int acpi_video_switch_brightness(struct acpi_video_device *device, int event) { - unsigned long level_current, level_next; - acpi_video_device_lcd_get_level_current(device, &level_current); + unsigned long long level_current, level_next; + int result = -EINVAL; + + /* no warning message if acpi_backlight=vendor or a quirk is used */ + if (!acpi_video_verify_backlight_support()) + return 0; + + if (!device->brightness) + goto out; + + result = acpi_video_device_lcd_get_level_current(device, + &level_current, + false); + if (result) + goto out; + level_next = acpi_video_get_next_level(device, level_current, event); - acpi_video_device_lcd_set_level(device, level_next); -} -static int -acpi_video_bus_get_devices(struct acpi_video_bus *video, - struct acpi_device *device) -{ - int status = 0; - struct acpi_device *dev; + result = acpi_video_device_lcd_set_level(device, level_next); - acpi_video_device_enumerate(video); + if (!result) + backlight_force_update(device->backlight, + BACKLIGHT_UPDATE_HOTKEY); - list_for_each_entry(dev, &device->children, node) { +out: + if (result) + printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); - status = acpi_video_bus_get_one_device(dev, video); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Cant attach device")); - continue; - } - } - return status; + return result; } -static int acpi_video_bus_put_one_device(struct acpi_video_device *device) +int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, + void **edid) { - acpi_status status; struct acpi_video_bus *video; + struct acpi_video_device *video_device; + union acpi_object *buffer = NULL; + acpi_status status; + int i, length; + if (!device || !acpi_driver_data(device)) + return -EINVAL; - if (!device || !device->video) - return -ENOENT; + video = acpi_driver_data(device); - video = device->video; + for (i = 0; i < video->attached_count; i++) { + video_device = video->attached_array[i].bind_info; + length = 256; - acpi_video_device_remove_fs(device->dev); + if (!video_device) + continue; + + if (!video_device->cap._DDC) + continue; - status = acpi_remove_notify_handler(device->dev->handle, - ACPI_DEVICE_NOTIFY, - acpi_video_device_notify); - backlight_device_unregister(device->backlight); - if (device->cdev) { - sysfs_remove_link(&device->dev->dev.kobj, - "thermal_cooling"); - sysfs_remove_link(&device->cdev->device.kobj, - "device"); - thermal_cooling_device_unregister(device->cdev); - device->cdev = NULL; + if (type) { + switch (type) { + case ACPI_VIDEO_DISPLAY_CRT: + if (!video_device->flags.crt) + continue; + break; + case ACPI_VIDEO_DISPLAY_TV: + if (!video_device->flags.tvout) + continue; + break; + case ACPI_VIDEO_DISPLAY_DVI: + if (!video_device->flags.dvi) + continue; + break; + case ACPI_VIDEO_DISPLAY_LCD: + if (!video_device->flags.lcd) + continue; + break; + } + } else if (video_device->device_id != device_id) { + continue; + } + + status = acpi_video_device_EDID(video_device, &buffer, length); + + if (ACPI_FAILURE(status) || !buffer || + buffer->type != ACPI_TYPE_BUFFER) { + length = 128; + status = acpi_video_device_EDID(video_device, &buffer, + length); + if (ACPI_FAILURE(status) || !buffer || + buffer->type != ACPI_TYPE_BUFFER) { + continue; + } + } + + *edid = buffer->buffer.pointer; + return length; } - video_output_unregister(device->output_dev); - return 0; + return -ENODEV; } +EXPORT_SYMBOL(acpi_video_get_edid); -static int acpi_video_bus_put_devices(struct acpi_video_bus *video) +static int +acpi_video_bus_get_devices(struct acpi_video_bus *video, + struct acpi_device *device) { - int status; - struct acpi_video_device *dev, *next; - - mutex_lock(&video->device_list_lock); + int status = 0; + struct acpi_device *dev; - list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { + /* + * There are systems where video module known to work fine regardless + * of broken _DOD and ignoring returned value here doesn't cause + * any issues later. + */ + acpi_video_device_enumerate(video); - status = acpi_video_bus_put_one_device(dev); - if (ACPI_FAILURE(status)) - printk(KERN_WARNING PREFIX - "hhuuhhuu bug in acpi video driver.\n"); + list_for_each_entry(dev, &device->children, node) { - if (dev->brightness) { - kfree(dev->brightness->levels); - kfree(dev->brightness); + status = acpi_video_bus_get_one_device(dev, video); + if (status) { + dev_err(&dev->dev, "Can't attach device\n"); + break; } - list_del(&dev->entry); - kfree(dev); } - - mutex_unlock(&video->device_list_lock); - - return 0; + return status; } /* acpi_video interface */ +/* + * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't + * preform any automatic brightness change on receiving a notification. + */ static int acpi_video_bus_start_devices(struct acpi_video_bus *video) { - return acpi_video_bus_DOS(video, 0, 0); + return acpi_video_bus_DOS(video, 0, + acpi_osi_is_win8() ? 1 : 0); } static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) { - return acpi_video_bus_DOS(video, 0, 1); + return acpi_video_bus_DOS(video, 0, + acpi_osi_is_win8() ? 0 : 1); } -static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data) +static void acpi_video_bus_notify(struct acpi_device *device, u32 event) { - struct acpi_video_bus *video = data; - struct acpi_device *device = NULL; + struct acpi_video_bus *video = acpi_driver_data(device); struct input_dev *input; - int keycode; + int keycode = 0; - if (!video) + if (!video || !video->input) return; - device = video->device; input = video->input; switch (event) { case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, * most likely via hotkey. */ - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_SWITCHVIDEOMODE; break; @@ -1828,35 +1576,35 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data) * connector. */ acpi_video_device_enumerate(video); acpi_video_device_rebind(video); - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_SWITCHVIDEOMODE; break; case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_SWITCHVIDEOMODE; break; case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_VIDEO_NEXT; break; case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_VIDEO_PREV; break; default: - keycode = KEY_UNKNOWN; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unsupported event [0x%x]\n", event)); break; } - acpi_notifier_call_chain(device, event, 0); - input_report_key(input, keycode, 1); - input_sync(input); - input_report_key(input, keycode, 0); - input_sync(input); + if (acpi_notifier_call_chain(device, event, 0)) + /* Something vetoed the keypress. */ + keycode = 0; + + if (keycode) { + input_report_key(input, keycode, 1); + input_sync(input); + input_report_key(input, keycode, 0); + input_sync(input); + } return; } @@ -1867,7 +1615,7 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) struct acpi_device *device = NULL; struct acpi_video_bus *bus; struct input_dev *input; - int keycode; + int keycode = 0; if (!video_device) return; @@ -1880,131 +1628,263 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ if (brightness_switch_enabled) acpi_video_switch_brightness(video_device, event); - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_BRIGHTNESS_CYCLE; break; case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ if (brightness_switch_enabled) acpi_video_switch_brightness(video_device, event); - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_BRIGHTNESSUP; break; case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ if (brightness_switch_enabled) acpi_video_switch_brightness(video_device, event); - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_BRIGHTNESSDOWN; break; - case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */ + case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ if (brightness_switch_enabled) acpi_video_switch_brightness(video_device, event); - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_BRIGHTNESS_ZERO; break; case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ if (brightness_switch_enabled) acpi_video_switch_brightness(video_device, event); - acpi_bus_generate_proc_event(device, event, 0); keycode = KEY_DISPLAY_OFF; break; default: - keycode = KEY_UNKNOWN; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unsupported event [0x%x]\n", event)); break; } acpi_notifier_call_chain(device, event, 0); - input_report_key(input, keycode, 1); - input_sync(input); - input_report_key(input, keycode, 0); - input_sync(input); + + if (keycode) { + input_report_key(input, keycode, 1); + input_sync(input); + input_report_key(input, keycode, 0); + input_sync(input); + } return; } -static int instance; -static int acpi_video_resume(struct acpi_device *device) +static int acpi_video_resume(struct notifier_block *nb, + unsigned long val, void *ign) { struct acpi_video_bus *video; struct acpi_video_device *video_device; int i; - if (!device || !acpi_driver_data(device)) - return -EINVAL; + switch (val) { + case PM_HIBERNATION_PREPARE: + case PM_SUSPEND_PREPARE: + case PM_RESTORE_PREPARE: + return NOTIFY_DONE; + } - video = acpi_driver_data(device); + video = container_of(nb, struct acpi_video_bus, pm_nb); + + dev_info(&video->device->dev, "Restoring backlight state\n"); for (i = 0; i < video->attached_count; i++) { video_device = video->attached_array[i].bind_info; if (video_device && video_device->backlight) acpi_video_set_brightness(video_device->backlight); } + + return NOTIFY_OK; +} + +static acpi_status +acpi_video_bus_match(acpi_handle handle, u32 level, void *context, + void **return_value) +{ + struct acpi_device *device = context; + struct acpi_device *sibling; + int result; + + if (handle == device->handle) + return AE_CTRL_TERMINATE; + + result = acpi_bus_get_device(handle, &sibling); + if (result) + return AE_OK; + + if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) + return AE_ALREADY_EXISTS; + return AE_OK; } -static int acpi_video_bus_add(struct acpi_device *device) +static void acpi_video_dev_register_backlight(struct acpi_video_device *device) { - acpi_status status; - struct acpi_video_bus *video; - struct input_dev *input; - int error; + struct backlight_properties props; + struct pci_dev *pdev; + acpi_handle acpi_parent; + struct device *parent = NULL; + int result; + static int count; + char *name; - video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); - if (!video) - return -ENOMEM; + result = acpi_video_init_brightness(device); + if (result) + return; + name = kasprintf(GFP_KERNEL, "acpi_video%d", count); + if (!name) + return; + count++; - /* a hack to fix the duplicate name "VID" problem on T61 */ - if (!strcmp(device->pnp.bus_id, "VID")) { - if (instance) - device->pnp.bus_id[3] = '0' + instance; - instance ++; + acpi_get_parent(device->dev->handle, &acpi_parent); + + pdev = acpi_get_pci_dev(acpi_parent); + if (pdev) { + parent = &pdev->dev; + pci_dev_put(pdev); } - video->device = device; - strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); - strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); - acpi_driver_data(device) = video; + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_FIRMWARE; + props.max_brightness = device->brightness->count - 3; + device->backlight = backlight_device_register(name, + parent, + device, + &acpi_backlight_ops, + &props); + kfree(name); + if (IS_ERR(device->backlight)) + return; - acpi_video_bus_find_cap(video); - error = acpi_video_bus_check(video); - if (error) - goto err_free_video; + /* + * Save current brightness level in case we have to restore it + * before acpi_video_device_lcd_set_level() is called next time. + */ + device->backlight->props.brightness = + acpi_video_get_brightness(device->backlight); + + device->cooling_dev = thermal_cooling_device_register("LCD", + device->dev, &video_cooling_ops); + if (IS_ERR(device->cooling_dev)) { + /* + * Set cooling_dev to NULL so we don't crash trying to free it. + * Also, why the hell we are returning early and not attempt to + * register video output if cooling device registration failed? + * -- dtor + */ + device->cooling_dev = NULL; + return; + } - error = acpi_video_bus_add_fs(device); - if (error) - goto err_free_video; + dev_info(&device->dev->dev, "registered as cooling_device%d\n", + device->cooling_dev->id); + result = sysfs_create_link(&device->dev->dev.kobj, + &device->cooling_dev->device.kobj, + "thermal_cooling"); + if (result) + printk(KERN_ERR PREFIX "Create sysfs link\n"); + result = sysfs_create_link(&device->cooling_dev->device.kobj, + &device->dev->dev.kobj, "device"); + if (result) + printk(KERN_ERR PREFIX "Create sysfs link\n"); +} - mutex_init(&video->device_list_lock); - INIT_LIST_HEAD(&video->video_device_list); +static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) +{ + struct acpi_video_device *dev; - acpi_video_bus_get_devices(video, device); - acpi_video_bus_start_devices(video); + if (video->backlight_registered) + return 0; - status = acpi_install_notify_handler(device->handle, - ACPI_DEVICE_NOTIFY, - acpi_video_bus_notify, video); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error installing notify handler\n")); - error = -ENODEV; - goto err_stop_video; + if (!acpi_video_verify_backlight_support()) + return 0; + + mutex_lock(&video->device_list_lock); + list_for_each_entry(dev, &video->video_device_list, entry) + acpi_video_dev_register_backlight(dev); + mutex_unlock(&video->device_list_lock); + + video->backlight_registered = true; + + video->pm_nb.notifier_call = acpi_video_resume; + video->pm_nb.priority = 0; + return register_pm_notifier(&video->pm_nb); +} + +static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) +{ + if (device->backlight) { + backlight_device_unregister(device->backlight); + device->backlight = NULL; + } + if (device->brightness) { + kfree(device->brightness->levels); + kfree(device->brightness); + device->brightness = NULL; + } + if (device->cooling_dev) { + sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); + sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); + thermal_cooling_device_unregister(device->cooling_dev); + device->cooling_dev = NULL; } +} + +static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) +{ + struct acpi_video_device *dev; + int error; + + if (!video->backlight_registered) + return 0; + + error = unregister_pm_notifier(&video->pm_nb); + + mutex_lock(&video->device_list_lock); + list_for_each_entry(dev, &video->video_device_list, entry) + acpi_video_dev_unregister_backlight(dev); + mutex_unlock(&video->device_list_lock); + + video->backlight_registered = false; + + return error; +} + +static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) +{ + acpi_status status; + struct acpi_device *adev = device->dev; + + status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, + acpi_video_device_notify, device); + if (ACPI_FAILURE(status)) + dev_err(&adev->dev, "Error installing notify handler\n"); + else + device->flags.notify = 1; +} + +static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) +{ + struct input_dev *input; + struct acpi_video_device *dev; + int error; video->input = input = input_allocate_device(); if (!input) { error = -ENOMEM; - goto err_uninstall_notify; + goto out; } + error = acpi_video_bus_start_devices(video); + if (error) + goto err_free_input; + snprintf(video->phys, sizeof(video->phys), - "%s/video/input0", acpi_device_hid(video->device)); + "%s/video/input0", acpi_device_hid(video->device)); input->name = acpi_device_name(video->device); input->phys = video->phys; input->id.bustype = BUS_HOST; input->id.product = 0x06; - input->dev.parent = &device->dev; + input->dev.parent = &video->device->dev; input->evbit[0] = BIT(EV_KEY); set_bit(KEY_SWITCHVIDEOMODE, input->keybit); set_bit(KEY_VIDEO_NEXT, input->keybit); @@ -2014,40 +1894,197 @@ static int acpi_video_bus_add(struct acpi_device *device) set_bit(KEY_BRIGHTNESSDOWN, input->keybit); set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); set_bit(KEY_DISPLAY_OFF, input->keybit); - set_bit(KEY_UNKNOWN, input->keybit); error = input_register_device(input); if (error) - goto err_free_input_dev; + goto err_stop_dev; + + mutex_lock(&video->device_list_lock); + list_for_each_entry(dev, &video->video_device_list, entry) + acpi_video_dev_add_notify_handler(dev); + mutex_unlock(&video->device_list_lock); + + return 0; + +err_stop_dev: + acpi_video_bus_stop_devices(video); +err_free_input: + input_free_device(input); + video->input = NULL; +out: + return error; +} + +static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) +{ + if (dev->flags.notify) { + acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, + acpi_video_device_notify); + dev->flags.notify = 0; + } +} + +static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) +{ + struct acpi_video_device *dev; + + mutex_lock(&video->device_list_lock); + list_for_each_entry(dev, &video->video_device_list, entry) + acpi_video_dev_remove_notify_handler(dev); + mutex_unlock(&video->device_list_lock); + + acpi_video_bus_stop_devices(video); + input_unregister_device(video->input); + video->input = NULL; +} + +static int acpi_video_backlight_notify(struct notifier_block *nb, + unsigned long val, void *bd) +{ + struct backlight_device *backlight = bd; + struct acpi_video_bus *video; + + /* acpi_video_verify_backlight_support only cares about raw devices */ + if (backlight->props.type != BACKLIGHT_RAW) + return NOTIFY_DONE; + + video = container_of(nb, struct acpi_video_bus, backlight_nb); + + switch (val) { + case BACKLIGHT_REGISTERED: + if (!acpi_video_verify_backlight_support()) + acpi_video_bus_unregister_backlight(video); + break; + case BACKLIGHT_UNREGISTERED: + acpi_video_bus_register_backlight(video); + break; + } + + return NOTIFY_OK; +} + +static int acpi_video_bus_add_backlight_notify_handler( + struct acpi_video_bus *video) +{ + int error; + + video->backlight_nb.notifier_call = acpi_video_backlight_notify; + video->backlight_nb.priority = 0; + error = backlight_register_notifier(&video->backlight_nb); + if (error == 0) + video->backlight_notifier_registered = true; + + return error; +} + +static int acpi_video_bus_remove_backlight_notify_handler( + struct acpi_video_bus *video) +{ + if (!video->backlight_notifier_registered) + return 0; + + video->backlight_notifier_registered = false; + + return backlight_unregister_notifier(&video->backlight_nb); +} + +static int acpi_video_bus_put_devices(struct acpi_video_bus *video) +{ + struct acpi_video_device *dev, *next; + + mutex_lock(&video->device_list_lock); + list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { + list_del(&dev->entry); + kfree(dev); + } + mutex_unlock(&video->device_list_lock); + + return 0; +} + +static int instance; + +static int acpi_video_bus_add(struct acpi_device *device) +{ + struct acpi_video_bus *video; + int error; + acpi_status status; + + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, + device->parent->handle, 1, + acpi_video_bus_match, NULL, + device, NULL); + if (status == AE_ALREADY_EXISTS) { + printk(KERN_WARNING FW_BUG + "Duplicate ACPI video bus devices for the" + " same VGA controller, please try module " + "parameter \"video.allow_duplicates=1\"" + "if the current driver doesn't work.\n"); + if (!allow_duplicates) + return -ENODEV; + } + + video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); + if (!video) + return -ENOMEM; + + /* a hack to fix the duplicate name "VID" problem on T61 */ + if (!strcmp(device->pnp.bus_id, "VID")) { + if (instance) + device->pnp.bus_id[3] = '0' + instance; + instance++; + } + /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ + if (!strcmp(device->pnp.bus_id, "VGA")) { + if (instance) + device->pnp.bus_id[3] = '0' + instance; + instance++; + } + + video->device = device; + strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); + strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); + device->driver_data = video; + + acpi_video_bus_find_cap(video); + error = acpi_video_bus_check(video); + if (error) + goto err_free_video; + + mutex_init(&video->device_list_lock); + INIT_LIST_HEAD(&video->video_device_list); + + error = acpi_video_bus_get_devices(video, device); + if (error) + goto err_put_video; printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), video->flags.multihead ? "yes" : "no", video->flags.rom ? "yes" : "no", video->flags.post ? "yes" : "no"); + mutex_lock(&video_list_lock); + list_add_tail(&video->entry, &video_bus_head); + mutex_unlock(&video_list_lock); + + acpi_video_bus_register_backlight(video); + acpi_video_bus_add_notify_handler(video); + acpi_video_bus_add_backlight_notify_handler(video); return 0; - err_free_input_dev: - input_free_device(input); - err_uninstall_notify: - acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, - acpi_video_bus_notify); - err_stop_video: - acpi_video_bus_stop_devices(video); +err_put_video: acpi_video_bus_put_devices(video); kfree(video->attached_array); - acpi_video_bus_remove_fs(device); - err_free_video: +err_free_video: kfree(video); - acpi_driver_data(device) = NULL; + device->driver_data = NULL; return error; } -static int acpi_video_bus_remove(struct acpi_device *device, int type) +static int acpi_video_bus_remove(struct acpi_device *device) { - acpi_status status = 0; struct acpi_video_bus *video = NULL; @@ -2056,52 +2093,131 @@ static int acpi_video_bus_remove(struct acpi_device *device, int type) video = acpi_driver_data(device); - acpi_video_bus_stop_devices(video); - - status = acpi_remove_notify_handler(video->device->handle, - ACPI_DEVICE_NOTIFY, - acpi_video_bus_notify); - + acpi_video_bus_remove_backlight_notify_handler(video); + acpi_video_bus_remove_notify_handler(video); + acpi_video_bus_unregister_backlight(video); acpi_video_bus_put_devices(video); - acpi_video_bus_remove_fs(device); - input_unregister_device(video->input); + mutex_lock(&video_list_lock); + list_del(&video->entry); + mutex_unlock(&video_list_lock); + kfree(video->attached_array); kfree(video); return 0; } -static int __init acpi_video_init(void) +static int __init is_i740(struct pci_dev *dev) +{ + if (dev->device == 0x00D1) + return 1; + if (dev->device == 0x7000) + return 1; + return 0; +} + +static int __init intel_opregion_present(void) +{ + int opregion = 0; + struct pci_dev *dev = NULL; + u32 address; + + for_each_pci_dev(dev) { + if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) + continue; + if (dev->vendor != PCI_VENDOR_ID_INTEL) + continue; + /* We don't want to poke around undefined i740 registers */ + if (is_i740(dev)) + continue; + pci_read_config_dword(dev, 0xfc, &address); + if (!address) + continue; + opregion = 1; + } + return opregion; +} + +int acpi_video_register(void) { int result = 0; + if (register_count) { + /* + * if the function of acpi_video_register is already called, + * don't register the acpi_vide_bus again and return no error. + */ + return 0; + } + mutex_init(&video_list_lock); + INIT_LIST_HEAD(&video_bus_head); + + result = acpi_bus_register_driver(&acpi_video_bus); + if (result < 0) + return -ENODEV; /* - acpi_dbg_level = 0xFFFFFFFF; - acpi_dbg_layer = 0x08000000; + * When the acpi_video_bus is loaded successfully, increase + * the counter reference. */ + register_count = 1; - acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir); - if (!acpi_video_dir) - return -ENODEV; - acpi_video_dir->owner = THIS_MODULE; + return 0; +} +EXPORT_SYMBOL(acpi_video_register); - result = acpi_bus_register_driver(&acpi_video_bus); - if (result < 0) { - remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); - return -ENODEV; +void acpi_video_unregister(void) +{ + if (!register_count) { + /* + * If the acpi video bus is already unloaded, don't + * unload it again and return directly. + */ + return; } + acpi_bus_unregister_driver(&acpi_video_bus); - return 0; + register_count = 0; + + return; } +EXPORT_SYMBOL(acpi_video_unregister); -static void __exit acpi_video_exit(void) +void acpi_video_unregister_backlight(void) { + struct acpi_video_bus *video; - acpi_bus_unregister_driver(&acpi_video_bus); + if (!register_count) + return; - remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); + mutex_lock(&video_list_lock); + list_for_each_entry(video, &video_bus_head, entry) + acpi_video_bus_unregister_backlight(video); + mutex_unlock(&video_list_lock); +} +EXPORT_SYMBOL(acpi_video_unregister_backlight); + +/* + * This is kind of nasty. Hardware using Intel chipsets may require + * the video opregion code to be run first in order to initialise + * state before any ACPI video calls are made. To handle this we defer + * registration of the video class until the opregion code has run. + */ + +static int __init acpi_video_init(void) +{ + dmi_check_system(video_dmi_table); + + if (intel_opregion_present()) + return 0; + + return acpi_video_register(); +} + +static void __exit acpi_video_exit(void) +{ + acpi_video_unregister(); return; } |