/* * video.c - ACPI Video Driver ($Revision:$) * * Copyright (C) 2004 Luming Yu * Copyright (C) 2004 Bruno Ducrot * Copyright (C) 2006 Thomas Tuttle * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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 #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 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"); MODULE_AUTHOR("Bruno Ducrot"); MODULE_DESCRIPTION("ACPI Video Driver"); MODULE_LICENSE("GPL"); static int brightness_switch_enabled = 1; module_param(brightness_switch_enabled, bool, 0644); 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 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, .resume = acpi_video_resume, .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 proc_dir_entry *dir; struct input_dev *input; char phys[32]; /* for input device */ }; struct acpi_video_device_flags { u8 crt:1; u8 lcd:1; u8 tvout:1; u8 dvi:1; u8 bios:1; u8 unknown:1; u8 reserved:2; }; 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 */ u8 _DCS:1; /*Return status of output device */ u8 _DGS:1; /*Query graphics state */ u8 _DSS:1; /*Device state set */ }; 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 *cdev; struct output_device *output_dev; }; /* bus */ static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file); static const struct file_operations acpi_video_bus_info_fops = { .owner = THIS_MODULE, .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 const struct file_operations acpi_video_bus_ROM_fops = { .owner = THIS_MODULE, .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 const struct file_operations acpi_video_bus_POST_info_fops = { .owner = THIS_MODULE, .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 ssize_t acpi_video_bus_write_POST(struct file *file, const char __user *buffer, size_t count, loff_t *data); static const struct file_operations acpi_video_bus_POST_fops = { .owner = THIS_MODULE, .open = acpi_video_bus_POST_open_fs, .read = seq_read, .write = acpi_video_bus_write_POST, .llseek = seq_lseek, .release = single_release, }; static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file); static ssize_t acpi_video_bus_write_DOS(struct file *file, const char __user *buffer, size_t count, loff_t *data); static const struct file_operations acpi_video_bus_DOS_fops = { .owner = THIS_MODULE, .open = acpi_video_bus_DOS_open_fs, .read = seq_read, .write = acpi_video_bus_write_DOS, .llseek = seq_lseek, .release = single_release, }; /* device */ static int acpi_video_device_info_open_fs(struct inode *inode, struct file *file); static const struct file_operations acpi_video_device_info_fops = { .owner = THIS_MODULE, .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 ssize_t acpi_video_device_write_state(struct file *file, const char __user *buffer, size_t count, loff_t *data); static const struct file_operations acpi_video_device_state_fops = { .owner = THIS_MODULE, .open = acpi_video_device_state_open_fs, .read = seq_read, .write = acpi_video_device_write_state, .llseek = seq_lseek, .release = single_release, }; static int acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file); static ssize_t acpi_video_device_write_brightness(struct file *file, const char __user *buffer, size_t count, loff_t *data); static struct file_operations acpi_video_device_brightness_fops = { .owner = THIS_MODULE, .open = acpi_video_device_brightness_open_fs, .read = seq_read, .write = acpi_video_device_write_brightness, .llseek = seq_lseek, .release = single_release, }; static int acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file); static const struct file_operations acpi_video_device_EDID_fops = { .owner = THIS_MODULE, .open = acpi_video_device_EDID_open_fs, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; 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); 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); static int acpi_video_device_get_state(struct acpi_video_device *device, unsigned long 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 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)) 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 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 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, unsigned long *state) { struct acpi_device *device = cdev->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 *cdev, unsigned long *state) { struct acpi_device *device = cdev->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)) 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 long state) { struct acpi_device *device = cdev->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 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 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 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 long ret; arg0.integer.value = state; status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret); return status; } 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 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"), }, }, {} }; static int acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, unsigned long long *level) { acpi_status status = AE_OK; 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 (device->brightness->flags._BQC_use_index) { if (device->brightness->flags._BCL_reversed) *level = device->brightness->count - 3 - (*level); *level = device->brightness->levels[*level + 2]; } *level += bqc_offset_aml_bug_workaround; device->brightness->curr = *level; return 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 */ static int acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option) { int status; unsigned long 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 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 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 : * 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: * -1 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 }; if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) { status = -1; goto Failed; } 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; } /* * 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; } /* * 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\n")); /* 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\n")); 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_old = max_level; if (!device->cap._BQC) goto set_level; result = acpi_video_device_lcd_get_level_current(device, &level_old); if (result) goto out_free_levels; /* * Set the level to maximum and check if _BQC uses indexed value */ result = acpi_video_device_lcd_set_level(device, max_level); if (result) goto out_free_levels; result = acpi_video_device_lcd_get_level_current(device, &level); if (result) goto out_free_levels; br->flags._BQC_use_index = (level == max_level ? 0 : 1); if (!br->flags._BQC_use_index) goto set_level; if (br->flags._BCL_reversed) level_old = (br->count - 1) - level_old; level_old = br->levels[level_old]; set_level: result = acpi_video_device_lcd_set_level(device, level_old); 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; memset(&device->cap, 0, sizeof(device->cap)); 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_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; } if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) { device->cap._DSS = 1; } if (acpi_video_backlight_support()) { int result; static int count = 0; char *name; result = acpi_video_init_brightness(device); if (result) return; 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; kfree(name); device->cdev = thermal_cooling_device_register("LCD", device->dev, &video_cooling_ops); if (IS_ERR(device->cdev)) return; dev_info(&device->dev->dev, "registered as cooling_device%d\n", 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 (acpi_video_display_switch_support()) { if (device->cap._DCS && device->cap._DSS) { static int count; 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 (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; memset(&video->cap, 0, sizeof(video->cap)); 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 device *dev; if (!video) return -EINVAL; dev = acpi_get_physical_pci_device(video->device->handle); if (!dev) return -ENODEV; put_device(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->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; } /* -------------------------------------------------------------------------- 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 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%02llx\n", state); else seq_printf(seq, "\n"); status = acpi_video_device_query(dev, &state); seq_printf(seq, "query: "); if (ACPI_SUCCESS(status)) seq_printf(seq, "0x%02llx\n", state); else seq_printf(seq, "\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; } static int acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset) { struct acpi_video_device *dev = seq->private; int i; if (!dev || !dev->brightness) { seq_printf(seq, "\n"); return 0; } seq_printf(seq, "levels: "); for (i = 2; i < dev->brightness->count; i++) seq_printf(seq, " %d", dev->brightness->levels[i]); seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr); return 0; } 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 = 2; i < dev->brightness->count; i++) if (level == dev->brightness->levels[i]) { if (!acpi_video_device_lcd_set_level(dev, level)) return count; break; } return -EINVAL; } static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset) { struct acpi_video_device *dev = seq->private; int status; 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, "\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, *device_dir; struct acpi_video_device *vid_dev; vid_dev = acpi_driver_data(device); if (!vid_dev) return -ENODEV; device_dir = proc_mkdir(acpi_device_bid(device), vid_dev->video->dir); if (!device_dir) return -ENOMEM; /* 'info' [R] */ entry = proc_create_data("info", S_IRUGO, device_dir, &acpi_video_device_info_fops, acpi_driver_data(device)); if (!entry) goto err_remove_dir; /* 'state' [R/W] */ entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR, device_dir, &acpi_video_device_state_fops, acpi_driver_data(device)); if (!entry) goto err_remove_info; /* 'brightness' [R/W] */ entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR, device_dir, &acpi_video_device_brightness_fops, acpi_driver_data(device)); if (!entry) goto err_remove_state; /* 'EDID' [R] */ entry = proc_create_data("EDID", S_IRUGO, device_dir, &acpi_video_device_EDID_fops, acpi_driver_data(device)); if (!entry) goto err_remove_brightness; acpi_device_dir(device) = device_dir; return 0; err_remove_brightness: remove_proc_entry("brightness", device_dir); err_remove_state: remove_proc_entry("state", device_dir); err_remove_info: remove_proc_entry("info", device_dir); err_remove_dir: remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir); return -ENOMEM; } static int acpi_video_device_remove_fs(struct acpi_device *device) { struct acpi_video_device *vid_dev; struct proc_dir_entry *device_dir; vid_dev = acpi_driver_data(device); if (!vid_dev || !vid_dev->video || !vid_dev->video->dir) return -ENODEV; device_dir = acpi_device_dir(device); if (device_dir) { remove_proc_entry("info", device_dir); remove_proc_entry("state", device_dir); remove_proc_entry("brightness", device_dir); remove_proc_entry("EDID", device_dir); 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, "\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 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(KERN_WARNING "%llx\n", options); seq_printf(seq, "can POST: "); if (options & 2) seq_printf(seq, " "); if (options & 4) seq_printf(seq, " "); seq_putc(seq, '\n'); } else seq_printf(seq, "\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 long id; if (!video) goto end; status = acpi_video_bus_get_POST(video, &id); if (!ACPI_SUCCESS(status)) { seq_printf(seq, "\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 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 acpi_video_bus *video = acpi_driver_data(device); struct proc_dir_entry *device_dir; struct proc_dir_entry *entry; device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir); if (!device_dir) return -ENOMEM; /* 'info' [R] */ entry = proc_create_data("info", S_IRUGO, device_dir, &acpi_video_bus_info_fops, acpi_driver_data(device)); if (!entry) goto err_remove_dir; /* 'ROM' [R] */ entry = proc_create_data("ROM", S_IRUGO, device_dir, &acpi_video_bus_ROM_fops, acpi_driver_data(device)); if (!entry) goto err_remove_info; /* 'POST_info' [R] */ entry = proc_create_data("POST_info", S_IRUGO, device_dir, &acpi_video_bus_POST_info_fops, acpi_driver_data(device)); if (!entry) goto err_remove_rom; /* 'POST' [R/W] */ entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR, device_dir, &acpi_video_bus_POST_fops, acpi_driver_data(device)); if (!entry) goto err_remove_post_info; /* 'DOS' [R/W] */ entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR, device_dir, &acpi_video_bus_DOS_fops, acpi_driver_data(device)); if (!entry) goto err_remove_post; video->dir = acpi_device_dir(device) = device_dir; return 0; err_remove_post: remove_proc_entry("POST", device_dir); err_remove_post_info: remove_proc_entry("POST_info", device_dir); err_remove_rom: remove_proc_entry("ROM", device_dir); err_remove_info: remove_proc_entry("info", device_dir); err_remove_dir: remove_proc_entry(acpi_device_bid(device), acpi_video_dir); return -ENOMEM; } static int acpi_video_bus_remove_fs(struct acpi_device *device) { struct proc_dir_entry *device_dir = acpi_device_dir(device); if (device_dir) { remove_proc_entry("info", device_dir); remove_proc_entry("ROM", device_dir); remove_proc_entry("POST_info", device_dir); remove_proc_entry("POST", device_dir); remove_proc_entry("DOS", device_dir); remove_proc_entry(acpi_device_bid(device), acpi_video_dir); acpi_device_dir(device) = NULL; } 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) { 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_bus_get_one_device(struct acpi_device *device, struct acpi_video_bus *video) { unsigned long long device_id; int status; struct acpi_video_device *data; struct acpi_video_device_attrib* attribute; if (!device || !video) return -EINVAL; status = acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); if (ACPI_SUCCESS(status)) { 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 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)) { printk(KERN_ERR PREFIX "Error installing notify handler\n"); if(data->brightness) kfree(data->brightness->levels); kfree(data->brightness); kfree(data); return -ENODEV; } 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); return 0; } return -ENOENT; } /* * 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; if (!device->brightness) goto out; result = acpi_video_device_lcd_get_level_current(device, &level_current); 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); out: if (result) printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); return result; } static int acpi_video_bus_get_devices(struct acpi_video_bus *video, struct acpi_device *device) { int status = 0; struct acpi_device *dev; acpi_video_device_enumerate(video); list_for_each_entry(dev, &device->children, node) { status = acpi_video_bus_get_one_device(dev, video); if (ACPI_FAILURE(status)) { printk(KERN_WARNING PREFIX "Cant attach device"); continue; } } return status; } static int acpi_video_bus_put_one_device(struct acpi_video_device *device) { acpi_status status; struct acpi_video_bus *video; if (!device || !device->video) return -ENOENT; video = device->video; acpi_video_device_remove_fs(device->dev); 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; } video_output_unregister(device->output_dev); 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; 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: 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); 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; 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 brightnesss */ 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); return; } static int instance; static int acpi_video_resume(struct acpi_device *device) { struct acpi_video_bus *video; struct acpi_video_device *video_device; int i; 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; if (video_device && video_device->backlight) acpi_video_set_brightness(video_device->backlight); } return AE_OK; } static int acpi_video_bus_add(struct acpi_device *device) { struct acpi_video_bus *video; struct input_dev *input; int error; 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; error = acpi_video_bus_add_fs(device); if (error) goto err_free_video; mutex_init(&video->device_list_lock); INIT_LIST_HEAD(&video->video_device_list); acpi_video_bus_get_devices(video, device); acpi_video_bus_start_devices(video); video->input = input = input_allocate_device(); if (!input) { error = -ENOMEM; goto err_stop_video; } 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); set_bit(KEY_UNKNOWN, input->keybit); error = input_register_device(input); if (error) goto err_free_input_dev; 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"); return 0; err_free_input_dev: input_free_device(input); err_stop_video: acpi_video_bus_stop_devices(video); acpi_video_bus_put_devices(video); kfree(video->attached_array); acpi_video_bus_remove_fs(device); err_free_video: kfree(video); device->driver_data = NULL; return error; } static int acpi_video_bus_remove(struct acpi_device *device, int type) { struct acpi_video_bus *video = NULL; if (!device || !acpi_driver_data(device)) return -EINVAL; video = acpi_driver_data(device); acpi_video_bus_stop_devices(video); acpi_video_bus_put_devices(video); acpi_video_bus_remove_fs(device); input_unregister_device(video->input); kfree(video->attached_array); kfree(video); return 0; } static int __init intel_opregion_present(void) { #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE) 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; pci_read_config_dword(dev, 0xfc, &address); if (!address) continue; return 1; } #endif return 0; } int acpi_video_register(void) { int result = 0; acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir); if (!acpi_video_dir) return -ENODEV; result = acpi_bus_register_driver(&acpi_video_bus); if (result < 0) { remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); return -ENODEV; } return 0; } EXPORT_SYMBOL(acpi_video_register); /* * 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(); } void __exit acpi_video_exit(void) { acpi_bus_unregister_driver(&acpi_video_bus); remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); return; } EXPORT_SYMBOL(acpi_video_exit); module_init(acpi_video_init); module_exit(acpi_video_exit);