diff options
Diffstat (limited to 'drivers/acpi/video.c')
| -rw-r--r-- | drivers/acpi/video.c | 1955 |
1 files changed, 0 insertions, 1955 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c deleted file mode 100644 index 5d7075d25700..000000000000 --- a/drivers/acpi/video.c +++ /dev/null @@ -1,1955 +0,0 @@ -/* - * video.c - ACPI Video Driver ($Revision:$) - * - * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> - * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> - * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/list.h> -#include <linux/mutex.h> -#include <linux/input.h> -#include <linux/backlight.h> -#include <linux/thermal.h> -#include <linux/sort.h> -#include <linux/pci.h> -#include <linux/pci_ids.h> -#include <linux/slab.h> -#include <asm/uaccess.h> -#include <linux/dmi.h> -#include <acpi/acpi_bus.h> -#include <acpi/acpi_drivers.h> -#include <linux/suspend.h> -#include <acpi/video.h> - -#define PREFIX "ACPI: " - -#define ACPI_VIDEO_BUS_NAME "Video Bus" -#define ACPI_VIDEO_DEVICE_NAME "Video Device" -#define ACPI_VIDEO_NOTIFY_SWITCH 0x80 -#define ACPI_VIDEO_NOTIFY_PROBE 0x81 -#define ACPI_VIDEO_NOTIFY_CYCLE 0x82 -#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 -#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 - -#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 -#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 -#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 -#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 -#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 - -#define MAX_NAME_LEN 20 - -#define _COMPONENT ACPI_VIDEO_COMPONENT -ACPI_MODULE_NAME("video"); - -MODULE_AUTHOR("Bruno Ducrot"); -MODULE_DESCRIPTION("ACPI Video Driver"); -MODULE_LICENSE("GPL"); - -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); - -/* - * Some BIOSes claim they use minimum backlight at boot, - * and this may bring dimming screen after boot - */ -static bool use_bios_initial_backlight = 1; -module_param(use_bios_initial_backlight, bool, 0644); - -static int register_count = 0; -static int acpi_video_bus_add(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}, - {"", 0}, -}; -MODULE_DEVICE_TABLE(acpi, video_device_ids); - -static struct acpi_driver acpi_video_bus = { - .name = "video", - .class = ACPI_VIDEO_CLASS, - .ids = video_device_ids, - .ops = { - .add = acpi_video_bus_add, - .remove = acpi_video_bus_remove, - .notify = acpi_video_bus_notify, - }, -}; - -struct acpi_video_bus_flags { - u8 multihead:1; /* can switch video heads */ - u8 rom:1; /* can retrieve a video rom */ - u8 post:1; /* can configure the head to */ - u8 reserved:5; -}; - -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 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 - 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 */ -}; - -struct acpi_video_enumerated_device { - union { - u32 int_val; - struct acpi_video_device_attrib attrib; - } value; - struct acpi_video_device *bind_info; -}; - -struct acpi_video_bus { - struct acpi_device *device; - u8 dos_setting; - struct acpi_video_enumerated_device *attached_array; - u8 attached_count; - struct acpi_video_bus_cap cap; - struct acpi_video_bus_flags flags; - struct list_head video_device_list; - struct mutex device_list_lock; /* protects video_device_list */ - struct input_dev *input; - char phys[32]; /* for input device */ - struct notifier_block pm_nb; -}; - -struct acpi_video_device_flags { - u8 crt:1; - u8 lcd:1; - u8 tvout:1; - u8 dvi:1; - u8 bios:1; - u8 unknown:1; - 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 _BQC:1; /* Get current brightness level */ - 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 _BCL_use_index:1; /* levels in _BCL are index values */ - u8 _BCM_use_index:1; /* input of _BCM is an index value */ - 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 { - unsigned long device_id; - struct acpi_video_device_flags flags; - struct acpi_video_device_cap cap; - struct list_head entry; - struct acpi_video_bus *video; - struct acpi_device *dev; - struct acpi_video_device_brightness *brightness; - struct backlight_device *backlight; - struct thermal_cooling_device *cooling_dev; -}; - -static const char device_decode[][30] = { - "motherboard VGA device", - "PCI VGA device", - "AGP VGA device", - "UNKNOWN", -}; - -static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); -static void acpi_video_device_rebind(struct acpi_video_bus *video); -static void acpi_video_device_bind(struct acpi_video_bus *video, - struct acpi_video_device *device); -static int acpi_video_device_enumerate(struct acpi_video_bus *video); -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 long *level, bool raw); -static int acpi_video_get_next_level(struct acpi_video_device *device, - u32 level_current, u32 event); -static int acpi_video_switch_brightness(struct acpi_video_device *device, - int event); - -/*backlight device sysfs support*/ -static int acpi_video_get_brightness(struct backlight_device *bd) -{ - unsigned long long cur_level; - int i; - struct acpi_video_device *vd = - (struct acpi_video_device *)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; - } - 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); - - return acpi_video_device_lcd_set_level(vd, - vd->brightness->levels[request_level]); -} - -static const struct backlight_ops acpi_backlight_ops = { - .get_brightness = acpi_video_get_brightness, - .update_status = acpi_video_set_brightness, -}; - -/* thermal cooling device callbacks */ -static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned - long *state) -{ - struct acpi_device *device = cooling_dev->devdata; - struct acpi_video_device *video = acpi_driver_data(device); - - *state = video->brightness->count - 3; - return 0; -} - -static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned - long *state) -{ - struct acpi_device *device = cooling_dev->devdata; - struct acpi_video_device *video = acpi_driver_data(device); - unsigned long long level; - int offset; - - 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 *cooling_dev, unsigned long state) -{ - struct acpi_device *device = cooling_dev->devdata; - struct acpi_video_device *video = acpi_driver_data(device); - int level; - - if ( state >= video->brightness->count - 2) - return -EINVAL; - - state = video->brightness->count - state; - level = video->brightness->levels[state -1]; - return acpi_video_device_lcd_set_level(video, level); -} - -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 - -------------------------------------------------------------------------- */ - -static int -acpi_video_device_lcd_query_levels(struct acpi_video_device *device, - union acpi_object **levels) -{ - int status; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - - - *levels = NULL; - - status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); - if (!ACPI_SUCCESS(status)) - return status; - obj = (union acpi_object *)buffer.pointer; - if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { - printk(KERN_ERR PREFIX "Invalid _BCL data\n"); - status = -EFAULT; - goto err; - } - - *levels = obj; - - return 0; - - err: - kfree(buffer.pointer); - - return status; -} - -static int -acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) -{ - int status; - union acpi_object arg0 = { ACPI_TYPE_INTEGER }; - struct acpi_object_list args = { 1, &arg0 }; - int state; - - arg0.integer.value = level; - - status = acpi_evaluate_object(device->dev->handle, "_BCM", - &args, NULL); - if (ACPI_FAILURE(status)) { - ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); - return -EIO; - } - - device->brightness->curr = level; - 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 video_ignore_initial_backlight(const struct dmi_system_id *d) -{ - use_bios_initial_backlight = 0; - 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_ignore_initial_backlight, - .ident = "HP Folio 13-2000", - .matches = { - DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), - DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), - }, - }, - { - .callback = video_ignore_initial_backlight, - .ident = "HP Pavilion dm4", - .matches = { - DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), - DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), - }, - }, - { - .callback = video_ignore_initial_backlight, - .ident = "HP Pavilion g6 Notebook PC", - .matches = { - DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), - DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), - }, - }, - { - .callback = video_ignore_initial_backlight, - .ident = "HP 1000 Notebook PC", - .matches = { - DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), - DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), - }, - }, - { - .callback = video_ignore_initial_backlight, - .ident = "HP Pavilion m4", - .matches = { - DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), - DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), - }, - }, - {} -}; - -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 long *level, bool raw) -{ - 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 0; -} - -static int -acpi_video_device_EDID(struct acpi_video_device *device, - union acpi_object **edid, ssize_t length) -{ - int status; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - union acpi_object arg0 = { ACPI_TYPE_INTEGER }; - struct acpi_object_list args = { 1, &arg0 }; - - - *edid = NULL; - - if (!device) - return -ENODEV; - if (length == 128) - arg0.integer.value = 1; - else if (length == 256) - arg0.integer.value = 2; - else - return -EINVAL; - - status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); - if (ACPI_FAILURE(status)) - return -ENODEV; - - obj = buffer.pointer; - - if (obj && obj->type == ACPI_TYPE_BUFFER) - *edid = obj; - else { - printk(KERN_ERR PREFIX "Invalid _DDC data\n"); - status = -EFAULT; - kfree(obj); - } - - return status; -} - -/* bus */ - -/* - * Arg: - * 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 - * active display output. No switch event. - * 2. The _DGS value should be locked. - * 3. The system BIOS should not automatically switch (toggle) the - * active display output, but instead generate the display switch - * event notify code. - * 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 - * level of the LCD when the power changes from AC to DC. - * Return Value: - * -EINVAL wrong arg. - */ - -static int -acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) -{ - acpi_status status; - union acpi_object arg0 = { ACPI_TYPE_INTEGER }; - struct acpi_object_list args = { 1, &arg0 }; - - if (!video->cap._DOS) - return 0; - - if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) - return -EINVAL; - arg0.integer.value = (lcd_flag << 2) | bios_flag; - video->dos_setting = arg0.integer.value; - status = acpi_evaluate_object(video->device->handle, "_DOS", - &args, NULL); - 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; - - /* 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[2] : 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; - } - - return 0; -} - - -/* - * Arg: - * device : video output device (LCD, CRT, ..) - * - * Return Value: - * Maximum brightness level - * - * Allocate and initialize device->brightness. - */ - -static int -acpi_video_init_brightness(struct acpi_video_device *device) -{ - 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; - - 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; - } - - if (obj->package.count < 2) - goto out; - - br = kzalloc(sizeof(*br), GFP_KERNEL); - if (!br) { - printk(KERN_ERR "can't allocate memory\n"); - result = -ENOMEM; - goto out; - } - - br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), - GFP_KERNEL); - if (!br->levels) { - result = -ENOMEM; - goto out_free; - } - - 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++; - } - - /* - * 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; - - /* Check the input/output of _BQC/_BCL/_BCM */ - if ((max_level < 100) && (max_level <= (count - 2))) - br->flags._BCL_use_index = 1; - - /* - * _BCM is always consistent with _BCL, - * at least for all the laptops we have ever seen. - */ - br->flags._BCM_use_index = br->flags._BCL_use_index; - - /* _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; - - if (use_bios_initial_backlight) { - 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_old == br->levels[i]) - break; - if (i == br->count) - 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; -} - -/* - * 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) -{ - acpi_handle h_dummy1; - - 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; - else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ", - &h_dummy1))) { - printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); - device->cap._BCQ = 1; - } - - if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { - device->cap._DDC = 1; - } - - if (acpi_video_backlight_support()) { - struct backlight_properties props; - struct pci_dev *pdev; - acpi_handle acpi_parent; - struct device *parent = NULL; - int result; - static int count = 0; - char *name; - - result = acpi_video_init_brightness(device); - if (result) - return; - name = kasprintf(GFP_KERNEL, "acpi_video%d", count); - if (!name) - return; - count++; - - acpi_get_parent(device->dev->handle, &acpi_parent); - - pdev = acpi_get_pci_dev(acpi_parent); - if (pdev) { - parent = &pdev->dev; - pci_dev_put(pdev); - } - - 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; - - /* - * 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; - } - - 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"); - - } -} - -/* - * Arg: - * device : video output device (VGA) - * - * Return Value: - * 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; - - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { - video->cap._DOS = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { - video->cap._DOD = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { - video->cap._ROM = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { - video->cap._GPD = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { - video->cap._SPD = 1; - } - if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) { - video->cap._VPO = 1; - } -} - -/* - * Check whether the video bus device has required AML method to - * support the desired features - */ - -static int acpi_video_bus_check(struct acpi_video_bus *video) -{ - acpi_status status = -ENOENT; - struct pci_dev *dev; - - if (!video) - return -EINVAL; - - 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 || 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; - } - - /* Does this device support retrieving a video ROM? */ - if (video->cap._ROM) { - video->flags.rom = 1; - status = 0; - } - - /* Does this device support configuring which video device to POST? */ - if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { - video->flags.post = 1; - status = 0; - } - - return status; -} - -/* -------------------------------------------------------------------------- - Driver Interface - -------------------------------------------------------------------------- */ - -/* 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_enumerated_device *ids; - int i; - - 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; - } - - return NULL; -} - -static int -acpi_video_get_device_type(struct acpi_video_bus *video, - unsigned long device_id) -{ - struct acpi_video_enumerated_device *ids; - int i; - - 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; -} - -static int -acpi_video_bus_get_one_device(struct acpi_device *device, - struct acpi_video_bus *video) -{ - unsigned long long device_id; - int status, device_type; - struct acpi_video_device *data; - struct acpi_video_device_attrib* attribute; - - status = - acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); - /* 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; - - 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; - - 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 { - /* 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; - } - } - - 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)) - dev_err(&device->dev, "Error installing notify handler\n"); - else - data->flags.notify = 1; - - mutex_lock(&video->device_list_lock); - list_add_tail(&data->entry, &video->video_device_list); - mutex_unlock(&video->device_list_lock); - - return status; -} - -/* - * Arg: - * video : video bus device - * - * Return: - * none - * - * Enumerate the video device list of the video bus, - * bind the ids with the corresponding video devices - * under the video bus. - */ - -static void acpi_video_device_rebind(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_device_bind(video, dev); - - mutex_unlock(&video->device_list_lock); -} - -/* - * Arg: - * video : video bus device - * device : video output device under the video - * bus - * - * Return: - * none - * - * Bind the ids with the corresponding video devices - * under the video bus. - */ - -static void -acpi_video_device_bind(struct acpi_video_bus *video, - struct acpi_video_device *device) -{ - struct acpi_video_enumerated_device *ids; - int i; - - 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)); - } - } -} - -/* - * Arg: - * video : video bus device - * - * Return: - * < 0 : error - * - * Call _DOD to enumerate all devices attached to display adapter - * - */ - -static int acpi_video_device_enumerate(struct acpi_video_bus *video) -{ - int status; - int count; - int i; - struct acpi_video_enumerated_device *active_list; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *dod = NULL; - union acpi_object *obj; - - status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); - if (!ACPI_SUCCESS(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); - return status; - } - - dod = buffer.pointer; - if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { - ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); - status = -EFAULT; - goto out; - } - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", - dod->package.count)); - - active_list = kcalloc(1 + dod->package.count, - sizeof(struct acpi_video_enumerated_device), - GFP_KERNEL); - if (!active_list) { - status = -ENOMEM; - goto out; - } - - count = 0; - for (i = 0; i < dod->package.count; i++) { - obj = &dod->package.elements[i]; - - if (obj->type != ACPI_TYPE_INTEGER) { - printk(KERN_ERR PREFIX - "Invalid _DOD data in element %d\n", i); - continue; - } - - 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++; - } - - kfree(video->attached_array); - - video->attached_array = active_list; - video->attached_count = count; - - out: - kfree(buffer.pointer); - return status; -} - -static int -acpi_video_get_next_level(struct acpi_video_device *device, - u32 level_current, u32 event) -{ - int min, max, min_above, max_below, i, l, delta = 255; - max = max_below = 0; - min = min_above = 255; - /* Find closest level to level_current */ - for (i = 2; i < device->brightness->count; i++) { - l = device->brightness->levels[i]; - if (abs(l - level_current) < abs(delta)) { - delta = l - level_current; - if (!delta) - break; - } - } - /* Ajust level_current to closest available level */ - level_current += delta; - for (i = 2; i < device->brightness->count; i++) { - l = device->brightness->levels[i]; - if (l < min) - min = l; - if (l > max) - max = l; - if (l < min_above && l > level_current) - min_above = l; - if (l > max_below && l < level_current) - max_below = l; - } - - switch (event) { - case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: - return (level_current < max) ? min_above : min; - case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: - return (level_current < max) ? min_above : max; - case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: - return (level_current > min) ? max_below : min; - case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: - case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: - return 0; - default: - return level_current; - } -} - -static int -acpi_video_switch_brightness(struct acpi_video_device *device, int event) -{ - unsigned long long level_current, level_next; - int result = -EINVAL; - - /* no warning message if acpi_backlight=vendor is used */ - if (!acpi_video_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); - - result = acpi_video_device_lcd_set_level(device, level_next); - - if (!result) - backlight_force_update(device->backlight, - BACKLIGHT_UPDATE_HOTKEY); - -out: - if (result) - printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); - - return result; -} - -int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, - void **edid) -{ - 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; - - video = acpi_driver_data(device); - - for (i = 0; i < video->attached_count; i++) { - video_device = video->attached_array[i].bind_info; - length = 256; - - if (!video_device) - continue; - - if (!video_device->cap._DDC) - continue; - - 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; - } - - return -ENODEV; -} -EXPORT_SYMBOL(acpi_video_get_edid); - -static int -acpi_video_bus_get_devices(struct acpi_video_bus *video, - struct acpi_device *device) -{ - int status = 0; - struct acpi_device *dev; - - /* - * 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); - - list_for_each_entry(dev, &device->children, node) { - - status = acpi_video_bus_get_one_device(dev, video); - if (status) { - dev_err(&dev->dev, "Can't attach device\n"); - break; - } - } - return status; -} - -static int acpi_video_bus_put_one_device(struct acpi_video_device *device) -{ - acpi_status status; - - if (!device || !device->video) - return -ENOENT; - - if (device->flags.notify) { - status = acpi_remove_notify_handler(device->dev->handle, - ACPI_DEVICE_NOTIFY, acpi_video_device_notify); - if (ACPI_FAILURE(status)) - dev_err(&device->dev->dev, - "Can't remove video notify handler\n"); - } - - if (device->backlight) { - backlight_device_unregister(device->backlight); - device->backlight = 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; - } - - return 0; -} - -static int acpi_video_bus_put_devices(struct acpi_video_bus *video) -{ - int status; - struct acpi_video_device *dev, *next; - - mutex_lock(&video->device_list_lock); - - list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { - - status = acpi_video_bus_put_one_device(dev); - if (ACPI_FAILURE(status)) - printk(KERN_WARNING PREFIX - "hhuuhhuu bug in acpi video driver.\n"); - - if (dev->brightness) { - kfree(dev->brightness->levels); - kfree(dev->brightness); - } - list_del(&dev->entry); - kfree(dev); - } - - mutex_unlock(&video->device_list_lock); - - return 0; -} - -/* acpi_video interface */ - -static int acpi_video_bus_start_devices(struct acpi_video_bus *video) -{ - return acpi_video_bus_DOS(video, 0, 0); -} - -static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) -{ - return acpi_video_bus_DOS(video, 0, 1); -} - -static void acpi_video_bus_notify(struct acpi_device *device, u32 event) -{ - struct acpi_video_bus *video = acpi_driver_data(device); - struct input_dev *input; - int keycode = 0; - - if (!video) - return; - - 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; - - case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video - * 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: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Unsupported event [0x%x]\n", event)); - break; - } - - 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; -} - -static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) -{ - struct acpi_video_device *video_device = data; - struct acpi_device *device = NULL; - struct acpi_video_bus *bus; - struct input_dev *input; - int keycode = 0; - - if (!video_device) - return; - - device = video_device->dev; - bus = video_device->video; - input = bus->input; - - switch (event) { - 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 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: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Unsupported event [0x%x]\n", event)); - break; - } - - acpi_notifier_call_chain(device, event, 0); - - if (keycode) { - input_report_key(input, keycode, 1); - input_sync(input); - input_report_key(input, keycode, 0); - input_sync(input); - } - - return; -} - -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; - - switch (val) { - case PM_HIBERNATION_PREPARE: - case PM_SUSPEND_PREPARE: - case PM_RESTORE_PREPARE: - return NOTIFY_DONE; - } - - 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 instance; - -static int acpi_video_bus_add(struct acpi_device *device) -{ - struct acpi_video_bus *video; - struct input_dev *input; - 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; - - video->input = input = input_allocate_device(); - if (!input) { - error = -ENOMEM; - goto err_put_video; - } - - error = acpi_video_bus_start_devices(video); - if (error) - goto err_free_input_dev; - - snprintf(video->phys, sizeof(video->phys), - "%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->evbit[0] = BIT(EV_KEY); - set_bit(KEY_SWITCHVIDEOMODE, input->keybit); - set_bit(KEY_VIDEO_NEXT, input->keybit); - set_bit(KEY_VIDEO_PREV, input->keybit); - set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); - set_bit(KEY_BRIGHTNESSUP, input->keybit); - set_bit(KEY_BRIGHTNESSDOWN, input->keybit); - set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); - set_bit(KEY_DISPLAY_OFF, input->keybit); - - 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"); - - video->pm_nb.notifier_call = acpi_video_resume; - video->pm_nb.priority = 0; - error = register_pm_notifier(&video->pm_nb); - if (error) - goto err_stop_video; - - error = input_register_device(input); - if (error) - goto err_unregister_pm_notifier; - - return 0; - - err_unregister_pm_notifier: - unregister_pm_notifier(&video->pm_nb); - err_stop_video: - acpi_video_bus_stop_devices(video); - err_free_input_dev: - input_free_device(input); - err_put_video: - acpi_video_bus_put_devices(video); - kfree(video->attached_array); - err_free_video: - kfree(video); - device->driver_data = NULL; - - return error; -} - -static int acpi_video_bus_remove(struct acpi_device *device) -{ - struct acpi_video_bus *video = NULL; - - - if (!device || !acpi_driver_data(device)) - return -EINVAL; - - video = acpi_driver_data(device); - - unregister_pm_notifier(&video->pm_nb); - - acpi_video_bus_stop_devices(video); - acpi_video_bus_put_devices(video); - - input_unregister_device(video->input); - kfree(video->attached_array); - kfree(video); - - return 0; -} - -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; - } - - result = acpi_bus_register_driver(&acpi_video_bus); - if (result < 0) - return -ENODEV; - - /* - * When the acpi_video_bus is loaded successfully, increase - * the counter reference. - */ - register_count = 1; - - return 0; -} -EXPORT_SYMBOL(acpi_video_register); - -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); - - register_count = 0; - - return; -} -EXPORT_SYMBOL(acpi_video_unregister); - -/* - * 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; -} - -module_init(acpi_video_init); -module_exit(acpi_video_exit); |