blob: 60ea984c84a02c651b606d6d42aa4b3610c21882 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
Thomas Tuttlef4715182006-12-19 12:56:14 -08006 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27#include <linux/kernel.h>
28#include <linux/module.h>
29#include <linux/init.h>
30#include <linux/types.h>
31#include <linux/list.h>
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -050032#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/proc_fs.h>
34#include <linux/seq_file.h>
Luming Yue9dab192007-08-20 18:23:53 +080035#include <linux/input.h>
Yu Luming2f3d0002006-11-11 02:40:34 +080036#include <linux/backlight.h>
Zhang Rui702ed512008-01-17 15:51:22 +080037#include <linux/thermal.h>
Luming Yu23b0f012007-05-09 21:07:05 +080038#include <linux/video_output.h>
Zhang Rui935e5f22008-12-11 16:24:52 -050039#include <linux/sort.h>
Matthew Garrett74a365b2009-03-19 21:35:39 +000040#include <linux/pci.h>
41#include <linux/pci_ids.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <asm/uaccess.h>
43
44#include <acpi/acpi_bus.h>
45#include <acpi/acpi_drivers.h>
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#define ACPI_VIDEO_CLASS "video"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#define ACPI_VIDEO_BUS_NAME "Video Bus"
49#define ACPI_VIDEO_DEVICE_NAME "Video Device"
50#define ACPI_VIDEO_NOTIFY_SWITCH 0x80
51#define ACPI_VIDEO_NOTIFY_PROBE 0x81
52#define ACPI_VIDEO_NOTIFY_CYCLE 0x82
53#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
54#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
55
Thomas Tuttlef4715182006-12-19 12:56:14 -080056#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
57#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
58#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
59#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
60#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Yu Luming2f3d0002006-11-11 02:40:34 +080062#define MAX_NAME_LEN 20
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Rui Zhang82cae992007-01-03 23:40:53 -050064#define ACPI_VIDEO_DISPLAY_CRT 1
65#define ACPI_VIDEO_DISPLAY_TV 2
66#define ACPI_VIDEO_DISPLAY_DVI 3
67#define ACPI_VIDEO_DISPLAY_LCD 4
68
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#define _COMPONENT ACPI_VIDEO_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050070ACPI_MODULE_NAME("video");
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Len Brownf52fd662007-02-12 22:42:12 -050072MODULE_AUTHOR("Bruno Ducrot");
Len Brown7cda93e2007-02-12 23:50:02 -050073MODULE_DESCRIPTION("ACPI Video Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070074MODULE_LICENSE("GPL");
75
Zhang Rui8a681a42008-01-25 14:47:49 +080076static int brightness_switch_enabled = 1;
77module_param(brightness_switch_enabled, bool, 0644);
78
Zhao Yakui86e437f2009-06-16 11:23:13 +080079static int register_count = 0;
Len Brown4be44fc2005-08-05 00:44:28 -040080static int acpi_video_bus_add(struct acpi_device *device);
81static int acpi_video_bus_remove(struct acpi_device *device, int type);
Matthew Garrett863c1492008-02-04 23:31:24 -080082static int acpi_video_resume(struct acpi_device *device);
Bjorn Helgaas70155582009-04-07 15:37:11 +000083static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
Thomas Renninger1ba90e32007-07-23 14:44:41 +020085static const struct acpi_device_id video_device_ids[] = {
86 {ACPI_VIDEO_HID, 0},
87 {"", 0},
88};
89MODULE_DEVICE_TABLE(acpi, video_device_ids);
90
Linus Torvalds1da177e2005-04-16 15:20:36 -070091static struct acpi_driver acpi_video_bus = {
Len Brownc2b67052007-02-12 23:33:40 -050092 .name = "video",
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 .class = ACPI_VIDEO_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +020094 .ids = video_device_ids,
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 .ops = {
96 .add = acpi_video_bus_add,
97 .remove = acpi_video_bus_remove,
Matthew Garrett863c1492008-02-04 23:31:24 -080098 .resume = acpi_video_resume,
Bjorn Helgaas70155582009-04-07 15:37:11 +000099 .notify = acpi_video_bus_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400100 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101};
102
103struct acpi_video_bus_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400104 u8 multihead:1; /* can switch video heads */
105 u8 rom:1; /* can retrieve a video rom */
106 u8 post:1; /* can configure the head to */
107 u8 reserved:5;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108};
109
110struct acpi_video_bus_cap {
Len Brown4be44fc2005-08-05 00:44:28 -0400111 u8 _DOS:1; /*Enable/Disable output switching */
112 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
113 u8 _ROM:1; /*Get ROM Data */
114 u8 _GPD:1; /*Get POST Device */
115 u8 _SPD:1; /*Set POST Device */
116 u8 _VPO:1; /*Video POST Options */
117 u8 reserved:2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118};
119
Len Brown4be44fc2005-08-05 00:44:28 -0400120struct acpi_video_device_attrib {
121 u32 display_index:4; /* A zero-based instance of the Display */
Julius Volz98fb8fe2007-02-20 16:38:40 +0100122 u32 display_port_attachment:4; /*This field differentiates the display type */
Len Brown4be44fc2005-08-05 00:44:28 -0400123 u32 display_type:4; /*Describe the specific type in use */
Julius Volz98fb8fe2007-02-20 16:38:40 +0100124 u32 vendor_specific:4; /*Chipset Vendor Specific */
Len Brown4be44fc2005-08-05 00:44:28 -0400125 u32 bios_can_detect:1; /*BIOS can detect the device */
126 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
127 the VGA device. */
128 u32 pipe_id:3; /*For VGA multiple-head devices. */
129 u32 reserved:10; /*Must be 0 */
130 u32 device_id_scheme:1; /*Device ID Scheme */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131};
132
133struct acpi_video_enumerated_device {
134 union {
135 u32 int_val;
Len Brown4be44fc2005-08-05 00:44:28 -0400136 struct acpi_video_device_attrib attrib;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 } value;
138 struct acpi_video_device *bind_info;
139};
140
141struct acpi_video_bus {
Patrick Mochele6afa0d2006-05-19 16:54:40 -0400142 struct acpi_device *device;
Len Brown4be44fc2005-08-05 00:44:28 -0400143 u8 dos_setting;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 struct acpi_video_enumerated_device *attached_array;
Len Brown4be44fc2005-08-05 00:44:28 -0400145 u8 attached_count;
146 struct acpi_video_bus_cap cap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 struct acpi_video_bus_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400148 struct list_head video_device_list;
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -0500149 struct mutex device_list_lock; /* protects video_device_list */
Len Brown4be44fc2005-08-05 00:44:28 -0400150 struct proc_dir_entry *dir;
Luming Yue9dab192007-08-20 18:23:53 +0800151 struct input_dev *input;
152 char phys[32]; /* for input device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153};
154
155struct acpi_video_device_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400156 u8 crt:1;
157 u8 lcd:1;
158 u8 tvout:1;
Rui Zhang82cae992007-01-03 23:40:53 -0500159 u8 dvi:1;
Len Brown4be44fc2005-08-05 00:44:28 -0400160 u8 bios:1;
161 u8 unknown:1;
Rui Zhang82cae992007-01-03 23:40:53 -0500162 u8 reserved:2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163};
164
165struct acpi_video_device_cap {
Len Brown4be44fc2005-08-05 00:44:28 -0400166 u8 _ADR:1; /*Return the unique ID */
167 u8 _BCL:1; /*Query list of brightness control levels supported */
168 u8 _BCM:1; /*Set the brightness level */
Yu Luming2f3d0002006-11-11 02:40:34 +0800169 u8 _BQC:1; /* Get current brightness level */
Zhang Ruic60d6382009-03-18 16:27:18 +0800170 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
Len Brown4be44fc2005-08-05 00:44:28 -0400171 u8 _DDC:1; /*Return the EDID for this device */
172 u8 _DCS:1; /*Return status of output device */
173 u8 _DGS:1; /*Query graphics state */
174 u8 _DSS:1; /*Device state set */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175};
176
Zhang Ruid32f6942009-03-18 16:27:12 +0800177struct acpi_video_brightness_flags {
178 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
Zhang Ruid80fb992009-03-18 16:27:14 +0800179 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
Zhang Rui1a7c6182009-03-18 16:27:16 +0800180 u8 _BCL_use_index:1; /* levels in _BCL are index values */
181 u8 _BCM_use_index:1; /* input of _BCM is an index value */
182 u8 _BQC_use_index:1; /* _BQC returns an index value */
Zhang Ruid32f6942009-03-18 16:27:12 +0800183};
184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185struct acpi_video_device_brightness {
Len Brown4be44fc2005-08-05 00:44:28 -0400186 int curr;
187 int count;
188 int *levels;
Zhang Ruid32f6942009-03-18 16:27:12 +0800189 struct acpi_video_brightness_flags flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190};
191
192struct acpi_video_device {
Len Brown4be44fc2005-08-05 00:44:28 -0400193 unsigned long device_id;
194 struct acpi_video_device_flags flags;
195 struct acpi_video_device_cap cap;
196 struct list_head entry;
197 struct acpi_video_bus *video;
198 struct acpi_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 struct acpi_video_device_brightness *brightness;
Yu Luming2f3d0002006-11-11 02:40:34 +0800200 struct backlight_device *backlight;
Zhang Rui702ed512008-01-17 15:51:22 +0800201 struct thermal_cooling_device *cdev;
Luming Yu23b0f012007-05-09 21:07:05 +0800202 struct output_device *output_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203};
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205/* bus */
206static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100207static const struct file_operations acpi_video_bus_info_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700208 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400209 .open = acpi_video_bus_info_open_fs,
210 .read = seq_read,
211 .llseek = seq_lseek,
212 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213};
214
215static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100216static const struct file_operations acpi_video_bus_ROM_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700217 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400218 .open = acpi_video_bus_ROM_open_fs,
219 .read = seq_read,
220 .llseek = seq_lseek,
221 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222};
223
Len Brown4be44fc2005-08-05 00:44:28 -0400224static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
225 struct file *file);
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100226static const struct file_operations acpi_video_bus_POST_info_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700227 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400228 .open = acpi_video_bus_POST_info_open_fs,
229 .read = seq_read,
230 .llseek = seq_lseek,
231 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232};
233
234static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
Len Brownc07c9a72009-04-04 03:33:45 -0400235static ssize_t acpi_video_bus_write_POST(struct file *file,
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100236 const char __user *buffer, size_t count, loff_t *data);
237static const struct file_operations acpi_video_bus_POST_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700238 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400239 .open = acpi_video_bus_POST_open_fs,
240 .read = seq_read,
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100241 .write = acpi_video_bus_write_POST,
Len Brown4be44fc2005-08-05 00:44:28 -0400242 .llseek = seq_lseek,
243 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244};
245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
Len Brownc07c9a72009-04-04 03:33:45 -0400247static ssize_t acpi_video_bus_write_DOS(struct file *file,
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100248 const char __user *buffer, size_t count, loff_t *data);
249static const struct file_operations acpi_video_bus_DOS_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700250 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400251 .open = acpi_video_bus_DOS_open_fs,
252 .read = seq_read,
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100253 .write = acpi_video_bus_write_DOS,
Len Brown4be44fc2005-08-05 00:44:28 -0400254 .llseek = seq_lseek,
255 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256};
257
258/* device */
Len Brown4be44fc2005-08-05 00:44:28 -0400259static int acpi_video_device_info_open_fs(struct inode *inode,
260 struct file *file);
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100261static const struct file_operations acpi_video_device_info_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700262 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400263 .open = acpi_video_device_info_open_fs,
264 .read = seq_read,
265 .llseek = seq_lseek,
266 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267};
268
Len Brown4be44fc2005-08-05 00:44:28 -0400269static int acpi_video_device_state_open_fs(struct inode *inode,
270 struct file *file);
Len Brownc07c9a72009-04-04 03:33:45 -0400271static ssize_t acpi_video_device_write_state(struct file *file,
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100272 const char __user *buffer, size_t count, loff_t *data);
273static const struct file_operations acpi_video_device_state_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700274 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400275 .open = acpi_video_device_state_open_fs,
276 .read = seq_read,
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100277 .write = acpi_video_device_write_state,
Len Brown4be44fc2005-08-05 00:44:28 -0400278 .llseek = seq_lseek,
279 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280};
281
Len Brown4be44fc2005-08-05 00:44:28 -0400282static int acpi_video_device_brightness_open_fs(struct inode *inode,
283 struct file *file);
Len Brownc07c9a72009-04-04 03:33:45 -0400284static ssize_t acpi_video_device_write_brightness(struct file *file,
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100285 const char __user *buffer, size_t count, loff_t *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286static struct file_operations acpi_video_device_brightness_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700287 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400288 .open = acpi_video_device_brightness_open_fs,
289 .read = seq_read,
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100290 .write = acpi_video_device_write_brightness,
Len Brown4be44fc2005-08-05 00:44:28 -0400291 .llseek = seq_lseek,
292 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293};
294
Len Brown4be44fc2005-08-05 00:44:28 -0400295static int acpi_video_device_EDID_open_fs(struct inode *inode,
296 struct file *file);
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100297static const struct file_operations acpi_video_device_EDID_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700298 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400299 .open = acpi_video_device_EDID_open_fs,
300 .read = seq_read,
301 .llseek = seq_lseek,
302 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303};
304
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100305static const char device_decode[][30] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 "motherboard VGA device",
307 "PCI VGA device",
308 "AGP VGA device",
309 "UNKNOWN",
310};
311
Len Brown4be44fc2005-08-05 00:44:28 -0400312static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
313static void acpi_video_device_rebind(struct acpi_video_bus *video);
314static void acpi_video_device_bind(struct acpi_video_bus *video,
315 struct acpi_video_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316static int acpi_video_device_enumerate(struct acpi_video_bus *video);
Yu Luming2f3d0002006-11-11 02:40:34 +0800317static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
318 int level);
319static int acpi_video_device_lcd_get_level_current(
320 struct acpi_video_device *device,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400321 unsigned long long *level);
Len Brown4be44fc2005-08-05 00:44:28 -0400322static int acpi_video_get_next_level(struct acpi_video_device *device,
323 u32 level_current, u32 event);
Zhang Ruic8890f92009-03-18 16:27:08 +0800324static int acpi_video_switch_brightness(struct acpi_video_device *device,
Len Brown4be44fc2005-08-05 00:44:28 -0400325 int event);
Luming Yu23b0f012007-05-09 21:07:05 +0800326static int acpi_video_device_get_state(struct acpi_video_device *device,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400327 unsigned long long *state);
Luming Yu23b0f012007-05-09 21:07:05 +0800328static int acpi_video_output_get(struct output_device *od);
329static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Yu Luming2f3d0002006-11-11 02:40:34 +0800331/*backlight device sysfs support*/
332static int acpi_video_get_brightness(struct backlight_device *bd)
333{
Matthew Wilcox27663c52008-10-10 02:22:59 -0400334 unsigned long long cur_level;
Matthew Garrett38531e62007-12-26 02:03:26 +0000335 int i;
Yu Luming2f3d0002006-11-11 02:40:34 +0800336 struct acpi_video_device *vd =
Richard Purdie655bfd72007-07-09 12:17:24 +0100337 (struct acpi_video_device *)bl_get_data(bd);
Zhang Ruic8890f92009-03-18 16:27:08 +0800338
339 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
340 return -EINVAL;
Matthew Garrett38531e62007-12-26 02:03:26 +0000341 for (i = 2; i < vd->brightness->count; i++) {
342 if (vd->brightness->levels[i] == cur_level)
343 /* The first two entries are special - see page 575
344 of the ACPI spec 3.0 */
345 return i-2;
346 }
347 return 0;
Yu Luming2f3d0002006-11-11 02:40:34 +0800348}
349
350static int acpi_video_set_brightness(struct backlight_device *bd)
351{
Zhang Rui24450c72009-03-18 16:27:10 +0800352 int request_level = bd->props.brightness + 2;
Yu Luming2f3d0002006-11-11 02:40:34 +0800353 struct acpi_video_device *vd =
Richard Purdie655bfd72007-07-09 12:17:24 +0100354 (struct acpi_video_device *)bl_get_data(bd);
Zhang Rui24450c72009-03-18 16:27:10 +0800355
356 return acpi_video_device_lcd_set_level(vd,
357 vd->brightness->levels[request_level]);
Yu Luming2f3d0002006-11-11 02:40:34 +0800358}
359
Richard Purdie599a52d2007-02-10 23:07:48 +0000360static struct backlight_ops acpi_backlight_ops = {
361 .get_brightness = acpi_video_get_brightness,
362 .update_status = acpi_video_set_brightness,
363};
364
Luming Yu23b0f012007-05-09 21:07:05 +0800365/*video output device sysfs support*/
366static int acpi_video_output_get(struct output_device *od)
367{
Matthew Wilcox27663c52008-10-10 02:22:59 -0400368 unsigned long long state;
Luming Yu23b0f012007-05-09 21:07:05 +0800369 struct acpi_video_device *vd =
tonyj@suse.de60043422007-08-07 22:28:47 -0700370 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
Luming Yu23b0f012007-05-09 21:07:05 +0800371 acpi_video_device_get_state(vd, &state);
372 return (int)state;
373}
374
375static int acpi_video_output_set(struct output_device *od)
376{
377 unsigned long state = od->request_state;
378 struct acpi_video_device *vd=
tonyj@suse.de60043422007-08-07 22:28:47 -0700379 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
Luming Yu23b0f012007-05-09 21:07:05 +0800380 return acpi_video_device_set_state(vd, state);
381}
382
383static struct output_properties acpi_output_properties = {
384 .set_state = acpi_video_output_set,
385 .get_status = acpi_video_output_get,
386};
Zhang Rui702ed512008-01-17 15:51:22 +0800387
388
389/* thermal cooling device callbacks */
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000390static int video_get_max_state(struct thermal_cooling_device *cdev, unsigned
391 long *state)
Zhang Rui702ed512008-01-17 15:51:22 +0800392{
393 struct acpi_device *device = cdev->devdata;
394 struct acpi_video_device *video = acpi_driver_data(device);
395
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000396 *state = video->brightness->count - 3;
397 return 0;
Zhang Rui702ed512008-01-17 15:51:22 +0800398}
399
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000400static int video_get_cur_state(struct thermal_cooling_device *cdev, unsigned
401 long *state)
Zhang Rui702ed512008-01-17 15:51:22 +0800402{
403 struct acpi_device *device = cdev->devdata;
404 struct acpi_video_device *video = acpi_driver_data(device);
Matthew Wilcox27663c52008-10-10 02:22:59 -0400405 unsigned long long level;
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000406 int offset;
Zhang Rui702ed512008-01-17 15:51:22 +0800407
Zhang Ruic8890f92009-03-18 16:27:08 +0800408 if (acpi_video_device_lcd_get_level_current(video, &level))
409 return -EINVAL;
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000410 for (offset = 2; offset < video->brightness->count; offset++)
411 if (level == video->brightness->levels[offset]) {
412 *state = video->brightness->count - offset - 1;
413 return 0;
414 }
Zhang Rui702ed512008-01-17 15:51:22 +0800415
416 return -EINVAL;
417}
418
419static int
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000420video_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
Zhang Rui702ed512008-01-17 15:51:22 +0800421{
422 struct acpi_device *device = cdev->devdata;
423 struct acpi_video_device *video = acpi_driver_data(device);
424 int level;
425
426 if ( state >= video->brightness->count - 2)
427 return -EINVAL;
428
429 state = video->brightness->count - state;
430 level = video->brightness->levels[state -1];
431 return acpi_video_device_lcd_set_level(video, level);
432}
433
434static struct thermal_cooling_device_ops video_cooling_ops = {
435 .get_max_state = video_get_max_state,
436 .get_cur_state = video_get_cur_state,
437 .set_cur_state = video_set_cur_state,
438};
439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440/* --------------------------------------------------------------------------
441 Video Management
442 -------------------------------------------------------------------------- */
443
444/* device */
445
446static int
Matthew Wilcox27663c52008-10-10 02:22:59 -0400447acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448{
Len Brown4be44fc2005-08-05 00:44:28 -0400449 int status;
Patrick Mochel90130262006-05-19 16:54:48 -0400450
451 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
Patrick Mocheld550d982006-06-27 00:41:40 -0400453 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454}
455
456static int
Len Brown4be44fc2005-08-05 00:44:28 -0400457acpi_video_device_get_state(struct acpi_video_device *device,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400458 unsigned long long *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459{
Len Brown4be44fc2005-08-05 00:44:28 -0400460 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Patrick Mochel90130262006-05-19 16:54:48 -0400462 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Patrick Mocheld550d982006-06-27 00:41:40 -0400464 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465}
466
467static int
Len Brown4be44fc2005-08-05 00:44:28 -0400468acpi_video_device_set_state(struct acpi_video_device *device, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469{
Len Brown4be44fc2005-08-05 00:44:28 -0400470 int status;
471 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
472 struct acpi_object_list args = { 1, &arg0 };
Matthew Wilcox27663c52008-10-10 02:22:59 -0400473 unsigned long long ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
476 arg0.integer.value = state;
Patrick Mochel90130262006-05-19 16:54:48 -0400477 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Patrick Mocheld550d982006-06-27 00:41:40 -0400479 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480}
481
482static int
Len Brown4be44fc2005-08-05 00:44:28 -0400483acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
484 union acpi_object **levels)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485{
Len Brown4be44fc2005-08-05 00:44:28 -0400486 int status;
487 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
488 union acpi_object *obj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
491 *levels = NULL;
492
Patrick Mochel90130262006-05-19 16:54:48 -0400493 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 if (!ACPI_SUCCESS(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400495 return status;
Len Brown4be44fc2005-08-05 00:44:28 -0400496 obj = (union acpi_object *)buffer.pointer;
Adrian Bunk6665bda2006-03-11 10:12:00 -0500497 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
Len Brown64684632006-06-26 23:41:38 -0400498 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 status = -EFAULT;
500 goto err;
501 }
502
503 *levels = obj;
504
Patrick Mocheld550d982006-06-27 00:41:40 -0400505 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
Len Brown4be44fc2005-08-05 00:44:28 -0400507 err:
Jesper Juhl6044ec82005-11-07 01:01:32 -0800508 kfree(buffer.pointer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Patrick Mocheld550d982006-06-27 00:41:40 -0400510 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511}
512
513static int
Len Brown4be44fc2005-08-05 00:44:28 -0400514acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515{
Zhang Rui24450c72009-03-18 16:27:10 +0800516 int status;
Len Brown4be44fc2005-08-05 00:44:28 -0400517 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
518 struct acpi_object_list args = { 1, &arg0 };
Zhang Rui9e6dada2008-12-31 10:58:48 +0800519 int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 arg0.integer.value = level;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
Zhang Rui24450c72009-03-18 16:27:10 +0800523 status = acpi_evaluate_object(device->dev->handle, "_BCM",
524 &args, NULL);
525 if (ACPI_FAILURE(status)) {
526 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
527 return -EIO;
528 }
529
Alexey Starikovskiy4500ca82007-09-03 16:29:58 +0400530 device->brightness->curr = level;
Zhang Rui9e6dada2008-12-31 10:58:48 +0800531 for (state = 2; state < device->brightness->count; state++)
Zhang Rui24450c72009-03-18 16:27:10 +0800532 if (level == device->brightness->levels[state]) {
Zhang Rui1a7c6182009-03-18 16:27:16 +0800533 if (device->backlight)
534 device->backlight->props.brightness = state - 2;
Zhang Rui24450c72009-03-18 16:27:10 +0800535 return 0;
536 }
Zhang Rui9e6dada2008-12-31 10:58:48 +0800537
Zhang Rui24450c72009-03-18 16:27:10 +0800538 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
539 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540}
541
Zhang Rui45cb50e2009-04-24 12:13:18 -0400542/*
543 * For some buggy _BQC methods, we need to add a constant value to
544 * the _BQC return value to get the actual current brightness level
545 */
546
547static int bqc_offset_aml_bug_workaround;
548static int __init video_set_bqc_offset(const struct dmi_system_id *d)
549{
550 bqc_offset_aml_bug_workaround = 9;
551 return 0;
552}
553
554static struct dmi_system_id video_dmi_table[] __initdata = {
555 /*
556 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
557 */
558 {
559 .callback = video_set_bqc_offset,
560 .ident = "Acer Aspire 5720",
561 .matches = {
562 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
563 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
564 },
565 },
Len Brown5afc4ab2009-05-07 21:11:56 -0400566 {
567 .callback = video_set_bqc_offset,
568 .ident = "Acer Aspire 5710Z",
569 .matches = {
570 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
571 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
572 },
573 },
Zhang Rui34ac2722009-05-26 23:35:34 -0400574 {
575 .callback = video_set_bqc_offset,
576 .ident = "eMachines E510",
577 .matches = {
578 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
579 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
580 },
581 },
Zhang Rui93bcece2009-05-19 15:08:41 -0400582 {
583 .callback = video_set_bqc_offset,
584 .ident = "Acer Aspire 5315",
585 .matches = {
586 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
587 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
588 },
589 },
Zhang Rui152a4e62009-06-22 11:31:18 +0800590 {
591 .callback = video_set_bqc_offset,
592 .ident = "Acer Aspire 7720",
593 .matches = {
594 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
595 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
596 },
597 },
Zhang Rui45cb50e2009-04-24 12:13:18 -0400598 {}
599};
600
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601static int
Len Brown4be44fc2005-08-05 00:44:28 -0400602acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400603 unsigned long long *level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604{
Zhang Ruic8890f92009-03-18 16:27:08 +0800605 acpi_status status = AE_OK;
606
Zhang Ruic60d6382009-03-18 16:27:18 +0800607 if (device->cap._BQC || device->cap._BCQ) {
608 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
609
610 status = acpi_evaluate_integer(device->dev->handle, buf,
Zhang Ruic8890f92009-03-18 16:27:08 +0800611 NULL, level);
612 if (ACPI_SUCCESS(status)) {
Zhang Rui1a7c6182009-03-18 16:27:16 +0800613 if (device->brightness->flags._BQC_use_index) {
614 if (device->brightness->flags._BCL_reversed)
615 *level = device->brightness->count
616 - 3 - (*level);
617 *level = device->brightness->levels[*level + 2];
618
619 }
Zhang Rui45cb50e2009-04-24 12:13:18 -0400620 *level += bqc_offset_aml_bug_workaround;
Zhang Ruic8890f92009-03-18 16:27:08 +0800621 device->brightness->curr = *level;
622 return 0;
623 } else {
624 /* Fixme:
625 * should we return an error or ignore this failure?
626 * dev->brightness->curr is a cached value which stores
627 * the correct current backlight level in most cases.
628 * ACPI video backlight still works w/ buggy _BQC.
629 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
630 */
Zhang Ruic60d6382009-03-18 16:27:18 +0800631 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
632 device->cap._BQC = device->cap._BCQ = 0;
Zhang Ruic8890f92009-03-18 16:27:08 +0800633 }
634 }
635
Alexey Starikovskiy4500ca82007-09-03 16:29:58 +0400636 *level = device->brightness->curr;
Zhang Ruic8890f92009-03-18 16:27:08 +0800637 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638}
639
640static int
Len Brown4be44fc2005-08-05 00:44:28 -0400641acpi_video_device_EDID(struct acpi_video_device *device,
642 union acpi_object **edid, ssize_t length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643{
Len Brown4be44fc2005-08-05 00:44:28 -0400644 int status;
645 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
646 union acpi_object *obj;
647 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
648 struct acpi_object_list args = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
651 *edid = NULL;
652
653 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400654 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 if (length == 128)
656 arg0.integer.value = 1;
657 else if (length == 256)
658 arg0.integer.value = 2;
659 else
Patrick Mocheld550d982006-06-27 00:41:40 -0400660 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
Patrick Mochel90130262006-05-19 16:54:48 -0400662 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400664 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200666 obj = buffer.pointer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
668 if (obj && obj->type == ACPI_TYPE_BUFFER)
669 *edid = obj;
670 else {
Len Brown64684632006-06-26 23:41:38 -0400671 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 status = -EFAULT;
673 kfree(obj);
674 }
675
Patrick Mocheld550d982006-06-27 00:41:40 -0400676 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677}
678
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679/* bus */
680
681static int
Len Brown4be44fc2005-08-05 00:44:28 -0400682acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683{
Len Brown4be44fc2005-08-05 00:44:28 -0400684 int status;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400685 unsigned long long tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400686 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
687 struct acpi_object_list args = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
690 arg0.integer.value = option;
691
Patrick Mochel90130262006-05-19 16:54:48 -0400692 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 if (ACPI_SUCCESS(status))
Len Brown4be44fc2005-08-05 00:44:28 -0400694 status = tmp ? (-EINVAL) : (AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695
Patrick Mocheld550d982006-06-27 00:41:40 -0400696 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697}
698
699static int
Matthew Wilcox27663c52008-10-10 02:22:59 -0400700acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701{
702 int status;
703
Patrick Mochel90130262006-05-19 16:54:48 -0400704 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705
Patrick Mocheld550d982006-06-27 00:41:40 -0400706 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707}
708
709static int
Len Brown4be44fc2005-08-05 00:44:28 -0400710acpi_video_bus_POST_options(struct acpi_video_bus *video,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400711 unsigned long long *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712{
Len Brown4be44fc2005-08-05 00:44:28 -0400713 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
Patrick Mochel90130262006-05-19 16:54:48 -0400715 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 *options &= 3;
717
Patrick Mocheld550d982006-06-27 00:41:40 -0400718 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719}
720
721/*
722 * Arg:
723 * video : video bus device pointer
724 * bios_flag :
725 * 0. The system BIOS should NOT automatically switch(toggle)
726 * the active display output.
727 * 1. The system BIOS should automatically switch (toggle) the
Julius Volz98fb8fe2007-02-20 16:38:40 +0100728 * active display output. No switch event.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 * 2. The _DGS value should be locked.
730 * 3. The system BIOS should not automatically switch (toggle) the
731 * active display output, but instead generate the display switch
732 * event notify code.
733 * lcd_flag :
734 * 0. The system BIOS should automatically control the brightness level
Julius Volz98fb8fe2007-02-20 16:38:40 +0100735 * of the LCD when the power changes from AC to DC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 * 1. The system BIOS should NOT automatically control the brightness
Julius Volz98fb8fe2007-02-20 16:38:40 +0100737 * level of the LCD when the power changes from AC to DC.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 * Return Value:
739 * -1 wrong arg.
740 */
741
742static int
Len Brown4be44fc2005-08-05 00:44:28 -0400743acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744{
Len Brown4be44fc2005-08-05 00:44:28 -0400745 acpi_integer status = 0;
746 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
747 struct acpi_object_list args = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
Len Brown4be44fc2005-08-05 00:44:28 -0400750 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 status = -1;
752 goto Failed;
753 }
754 arg0.integer.value = (lcd_flag << 2) | bios_flag;
755 video->dos_setting = arg0.integer.value;
Patrick Mochel90130262006-05-19 16:54:48 -0400756 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Len Brown4be44fc2005-08-05 00:44:28 -0400758 Failed:
Patrick Mocheld550d982006-06-27 00:41:40 -0400759 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760}
761
762/*
Zhang Rui935e5f22008-12-11 16:24:52 -0500763 * Simple comparison function used to sort backlight levels.
764 */
765
766static int
767acpi_video_cmp_level(const void *a, const void *b)
768{
769 return *(int *)a - *(int *)b;
770}
771
772/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 * Arg:
774 * device : video output device (LCD, CRT, ..)
775 *
776 * Return Value:
Julia Jomantaite469778c2008-06-23 22:50:42 +0100777 * Maximum brightness level
778 *
779 * Allocate and initialize device->brightness.
780 */
781
782static int
783acpi_video_init_brightness(struct acpi_video_device *device)
784{
785 union acpi_object *obj = NULL;
Zhang Ruid32f6942009-03-18 16:27:12 +0800786 int i, max_level = 0, count = 0, level_ac_battery = 0;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800787 unsigned long long level, level_old;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100788 union acpi_object *o;
789 struct acpi_video_device_brightness *br = NULL;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800790 int result = -EINVAL;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100791
792 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
793 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
794 "LCD brightness level\n"));
795 goto out;
796 }
797
798 if (obj->package.count < 2)
799 goto out;
800
801 br = kzalloc(sizeof(*br), GFP_KERNEL);
802 if (!br) {
803 printk(KERN_ERR "can't allocate memory\n");
Zhang Rui1a7c6182009-03-18 16:27:16 +0800804 result = -ENOMEM;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100805 goto out;
806 }
807
Zhang Ruid32f6942009-03-18 16:27:12 +0800808 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
Julia Jomantaite469778c2008-06-23 22:50:42 +0100809 GFP_KERNEL);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800810 if (!br->levels) {
811 result = -ENOMEM;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100812 goto out_free;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800813 }
Julia Jomantaite469778c2008-06-23 22:50:42 +0100814
815 for (i = 0; i < obj->package.count; i++) {
816 o = (union acpi_object *)&obj->package.elements[i];
817 if (o->type != ACPI_TYPE_INTEGER) {
818 printk(KERN_ERR PREFIX "Invalid data\n");
819 continue;
820 }
821 br->levels[count] = (u32) o->integer.value;
822
823 if (br->levels[count] > max_level)
824 max_level = br->levels[count];
825 count++;
826 }
827
Zhang Ruid32f6942009-03-18 16:27:12 +0800828 /*
829 * some buggy BIOS don't export the levels
830 * when machine is on AC/Battery in _BCL package.
831 * In this case, the first two elements in _BCL packages
832 * are also supported brightness levels that OS should take care of.
833 */
Zhang Rui90af2cf2009-04-14 11:02:18 +0800834 for (i = 2; i < count; i++) {
835 if (br->levels[i] == br->levels[0])
Zhang Ruid32f6942009-03-18 16:27:12 +0800836 level_ac_battery++;
Zhang Rui90af2cf2009-04-14 11:02:18 +0800837 if (br->levels[i] == br->levels[1])
838 level_ac_battery++;
839 }
Zhang Rui935e5f22008-12-11 16:24:52 -0500840
Zhang Ruid32f6942009-03-18 16:27:12 +0800841 if (level_ac_battery < 2) {
842 level_ac_battery = 2 - level_ac_battery;
843 br->flags._BCL_no_ac_battery_levels = 1;
844 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
845 br->levels[i] = br->levels[i - level_ac_battery];
846 count += level_ac_battery;
847 } else if (level_ac_battery > 2)
848 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
849
Zhang Ruid80fb992009-03-18 16:27:14 +0800850 /* Check if the _BCL package is in a reversed order */
851 if (max_level == br->levels[2]) {
852 br->flags._BCL_reversed = 1;
853 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
854 acpi_video_cmp_level, NULL);
855 } else if (max_level != br->levels[count - 1])
856 ACPI_ERROR((AE_INFO,
857 "Found unordered _BCL package\n"));
Julia Jomantaite469778c2008-06-23 22:50:42 +0100858
859 br->count = count;
860 device->brightness = br;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800861
862 /* Check the input/output of _BQC/_BCL/_BCM */
863 if ((max_level < 100) && (max_level <= (count - 2)))
864 br->flags._BCL_use_index = 1;
865
866 /*
867 * _BCM is always consistent with _BCL,
868 * at least for all the laptops we have ever seen.
869 */
870 br->flags._BCM_use_index = br->flags._BCL_use_index;
871
872 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
Zhang Ruie047cca2009-04-09 14:24:35 +0800873 br->curr = level_old = max_level;
874
875 if (!device->cap._BQC)
876 goto set_level;
877
Zhang Rui1a7c6182009-03-18 16:27:16 +0800878 result = acpi_video_device_lcd_get_level_current(device, &level_old);
879 if (result)
880 goto out_free_levels;
881
Zhang Ruie047cca2009-04-09 14:24:35 +0800882 /*
883 * Set the level to maximum and check if _BQC uses indexed value
884 */
885 result = acpi_video_device_lcd_set_level(device, max_level);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800886 if (result)
887 goto out_free_levels;
888
889 result = acpi_video_device_lcd_get_level_current(device, &level);
890 if (result)
891 goto out_free_levels;
892
Zhang Ruie047cca2009-04-09 14:24:35 +0800893 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800894
Zhang Ruie047cca2009-04-09 14:24:35 +0800895 if (!br->flags._BQC_use_index)
896 goto set_level;
897
898 if (br->flags._BCL_reversed)
899 level_old = (br->count - 1) - level_old;
900 level_old = br->levels[level_old];
901
902set_level:
903 result = acpi_video_device_lcd_set_level(device, level_old);
904 if (result)
905 goto out_free_levels;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800906
Zhang Ruid32f6942009-03-18 16:27:12 +0800907 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
908 "found %d brightness levels\n", count - 2));
Julia Jomantaite469778c2008-06-23 22:50:42 +0100909 kfree(obj);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800910 return result;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100911
912out_free_levels:
913 kfree(br->levels);
914out_free:
915 kfree(br);
916out:
917 device->brightness = NULL;
918 kfree(obj);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800919 return result;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100920}
921
922/*
923 * Arg:
924 * device : video output device (LCD, CRT, ..)
925 *
926 * Return Value:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 * None
928 *
Julius Volz98fb8fe2007-02-20 16:38:40 +0100929 * Find out all required AML methods defined under the output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 * device.
931 */
932
Len Brown4be44fc2005-08-05 00:44:28 -0400933static void acpi_video_device_find_cap(struct acpi_video_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 acpi_handle h_dummy1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937
William Lee Irwin III98934de2007-12-12 03:56:55 -0800938 memset(&device->cap, 0, sizeof(device->cap));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Patrick Mochel90130262006-05-19 16:54:48 -0400940 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 device->cap._ADR = 1;
942 }
Patrick Mochel90130262006-05-19 16:54:48 -0400943 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
Len Brown4be44fc2005-08-05 00:44:28 -0400944 device->cap._BCL = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 }
Patrick Mochel90130262006-05-19 16:54:48 -0400946 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
Len Brown4be44fc2005-08-05 00:44:28 -0400947 device->cap._BCM = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 }
Yu Luming2f3d0002006-11-11 02:40:34 +0800949 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
950 device->cap._BQC = 1;
Zhang Ruic60d6382009-03-18 16:27:18 +0800951 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
952 &h_dummy1))) {
953 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
954 device->cap._BCQ = 1;
955 }
956
Patrick Mochel90130262006-05-19 16:54:48 -0400957 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
Len Brown4be44fc2005-08-05 00:44:28 -0400958 device->cap._DDC = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 }
Patrick Mochel90130262006-05-19 16:54:48 -0400960 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 device->cap._DCS = 1;
962 }
Patrick Mochel90130262006-05-19 16:54:48 -0400963 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 device->cap._DGS = 1;
965 }
Patrick Mochel90130262006-05-19 16:54:48 -0400966 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 device->cap._DSS = 1;
968 }
969
Zhang Rui1a7c6182009-03-18 16:27:16 +0800970 if (acpi_video_backlight_support()) {
Zhang Rui702ed512008-01-17 15:51:22 +0800971 int result;
Yu Luming2f3d0002006-11-11 02:40:34 +0800972 static int count = 0;
973 char *name;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800974
975 result = acpi_video_init_brightness(device);
976 if (result)
977 return;
Yu Luming2f3d0002006-11-11 02:40:34 +0800978 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
979 if (!name)
980 return;
981
Yu Luming2f3d0002006-11-11 02:40:34 +0800982 sprintf(name, "acpi_video%d", count++);
Yu Luming2f3d0002006-11-11 02:40:34 +0800983 device->backlight = backlight_device_register(name,
Richard Purdie599a52d2007-02-10 23:07:48 +0000984 NULL, device, &acpi_backlight_ops);
Matthew Garrett38531e62007-12-26 02:03:26 +0000985 device->backlight->props.max_brightness = device->brightness->count-3;
Yu Luming2f3d0002006-11-11 02:40:34 +0800986 kfree(name);
Zhang Rui702ed512008-01-17 15:51:22 +0800987
Zhang Rui056c3082009-06-22 11:31:14 +0800988 result = sysfs_create_link(&device->backlight->dev.kobj,
989 &device->dev->dev.kobj, "device");
990 if (result)
991 printk(KERN_ERR PREFIX "Create sysfs link\n");
992
Zhang Rui702ed512008-01-17 15:51:22 +0800993 device->cdev = thermal_cooling_device_register("LCD",
994 device->dev, &video_cooling_ops);
Thomas Sujith43ff39f2008-02-15 18:29:18 -0500995 if (IS_ERR(device->cdev))
996 return;
997
Greg Kroah-Hartmanfc3a8822008-05-02 06:02:41 +0200998 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
999 device->cdev->id);
Julia Lawall90300622008-04-11 10:09:24 +08001000 result = sysfs_create_link(&device->dev->dev.kobj,
1001 &device->cdev->device.kobj,
1002 "thermal_cooling");
1003 if (result)
1004 printk(KERN_ERR PREFIX "Create sysfs link\n");
1005 result = sysfs_create_link(&device->cdev->device.kobj,
1006 &device->dev->dev.kobj, "device");
1007 if (result)
1008 printk(KERN_ERR PREFIX "Create sysfs link\n");
1009
Yu Luming2f3d0002006-11-11 02:40:34 +08001010 }
Thomas Renningerc3d6de62008-08-01 17:37:55 +02001011
1012 if (acpi_video_display_switch_support()) {
1013
1014 if (device->cap._DCS && device->cap._DSS) {
1015 static int count;
1016 char *name;
1017 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
1018 if (!name)
1019 return;
1020 sprintf(name, "acpi_video%d", count++);
1021 device->output_dev = video_output_register(name,
1022 NULL, device, &acpi_output_properties);
1023 kfree(name);
1024 }
Luming Yu23b0f012007-05-09 21:07:05 +08001025 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026}
1027
1028/*
1029 * Arg:
1030 * device : video output device (VGA)
1031 *
1032 * Return Value:
1033 * None
1034 *
Julius Volz98fb8fe2007-02-20 16:38:40 +01001035 * Find out all required AML methods defined under the video bus device.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 */
1037
Len Brown4be44fc2005-08-05 00:44:28 -04001038static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039{
Len Brown4be44fc2005-08-05 00:44:28 -04001040 acpi_handle h_dummy1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
William Lee Irwin III98934de2007-12-12 03:56:55 -08001042 memset(&video->cap, 0, sizeof(video->cap));
Patrick Mochel90130262006-05-19 16:54:48 -04001043 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 video->cap._DOS = 1;
1045 }
Patrick Mochel90130262006-05-19 16:54:48 -04001046 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 video->cap._DOD = 1;
1048 }
Patrick Mochel90130262006-05-19 16:54:48 -04001049 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 video->cap._ROM = 1;
1051 }
Patrick Mochel90130262006-05-19 16:54:48 -04001052 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 video->cap._GPD = 1;
1054 }
Patrick Mochel90130262006-05-19 16:54:48 -04001055 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 video->cap._SPD = 1;
1057 }
Patrick Mochel90130262006-05-19 16:54:48 -04001058 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 video->cap._VPO = 1;
1060 }
1061}
1062
1063/*
1064 * Check whether the video bus device has required AML method to
1065 * support the desired features
1066 */
1067
Len Brown4be44fc2005-08-05 00:44:28 -04001068static int acpi_video_bus_check(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069{
Len Brown4be44fc2005-08-05 00:44:28 -04001070 acpi_status status = -ENOENT;
Alexander Chiang1e4cffe2009-06-10 19:56:00 +00001071 struct pci_dev *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
1073 if (!video)
Patrick Mocheld550d982006-06-27 00:41:40 -04001074 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075
Alexander Chiang1e4cffe2009-06-10 19:56:00 +00001076 dev = acpi_get_pci_dev(video->device->handle);
Thomas Renninger22c13f92008-08-01 17:37:54 +02001077 if (!dev)
1078 return -ENODEV;
Alexander Chiang1e4cffe2009-06-10 19:56:00 +00001079 pci_dev_put(dev);
Thomas Renninger22c13f92008-08-01 17:37:54 +02001080
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 /* Since there is no HID, CID and so on for VGA driver, we have
1082 * to check well known required nodes.
1083 */
1084
Julius Volz98fb8fe2007-02-20 16:38:40 +01001085 /* Does this device support video switching? */
Len Brown4be44fc2005-08-05 00:44:28 -04001086 if (video->cap._DOS) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 video->flags.multihead = 1;
1088 status = 0;
1089 }
1090
Julius Volz98fb8fe2007-02-20 16:38:40 +01001091 /* Does this device support retrieving a video ROM? */
Len Brown4be44fc2005-08-05 00:44:28 -04001092 if (video->cap._ROM) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 video->flags.rom = 1;
1094 status = 0;
1095 }
1096
Julius Volz98fb8fe2007-02-20 16:38:40 +01001097 /* Does this device support configuring which video device to POST? */
Len Brown4be44fc2005-08-05 00:44:28 -04001098 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 video->flags.post = 1;
1100 status = 0;
1101 }
1102
Patrick Mocheld550d982006-06-27 00:41:40 -04001103 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104}
1105
1106/* --------------------------------------------------------------------------
1107 FS Interface (/proc)
1108 -------------------------------------------------------------------------- */
1109
Len Brown4be44fc2005-08-05 00:44:28 -04001110static struct proc_dir_entry *acpi_video_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111
1112/* video devices */
1113
Len Brown4be44fc2005-08-05 00:44:28 -04001114static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001116 struct acpi_video_device *dev = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
1119 if (!dev)
1120 goto end;
1121
1122 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1123 seq_printf(seq, "type: ");
1124 if (dev->flags.crt)
1125 seq_printf(seq, "CRT\n");
1126 else if (dev->flags.lcd)
1127 seq_printf(seq, "LCD\n");
1128 else if (dev->flags.tvout)
1129 seq_printf(seq, "TVOUT\n");
Rui Zhang82cae992007-01-03 23:40:53 -05001130 else if (dev->flags.dvi)
1131 seq_printf(seq, "DVI\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 else
1133 seq_printf(seq, "UNKNOWN\n");
1134
Len Brown4be44fc2005-08-05 00:44:28 -04001135 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
Len Brown4be44fc2005-08-05 00:44:28 -04001137 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001138 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139}
1140
1141static int
Len Brown4be44fc2005-08-05 00:44:28 -04001142acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143{
1144 return single_open(file, acpi_video_device_info_seq_show,
1145 PDE(inode)->data);
1146}
1147
Len Brown4be44fc2005-08-05 00:44:28 -04001148static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149{
Len Brown4be44fc2005-08-05 00:44:28 -04001150 int status;
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001151 struct acpi_video_device *dev = seq->private;
Matthew Wilcox27663c52008-10-10 02:22:59 -04001152 unsigned long long state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154
1155 if (!dev)
1156 goto end;
1157
1158 status = acpi_video_device_get_state(dev, &state);
1159 seq_printf(seq, "state: ");
1160 if (ACPI_SUCCESS(status))
Matthew Wilcox27663c52008-10-10 02:22:59 -04001161 seq_printf(seq, "0x%02llx\n", state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 else
1163 seq_printf(seq, "<not supported>\n");
1164
1165 status = acpi_video_device_query(dev, &state);
1166 seq_printf(seq, "query: ");
1167 if (ACPI_SUCCESS(status))
Matthew Wilcox27663c52008-10-10 02:22:59 -04001168 seq_printf(seq, "0x%02llx\n", state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 else
1170 seq_printf(seq, "<not supported>\n");
1171
Len Brown4be44fc2005-08-05 00:44:28 -04001172 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001173 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174}
1175
1176static int
Len Brown4be44fc2005-08-05 00:44:28 -04001177acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178{
1179 return single_open(file, acpi_video_device_state_seq_show,
1180 PDE(inode)->data);
1181}
1182
1183static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -04001184acpi_video_device_write_state(struct file *file,
1185 const char __user * buffer,
1186 size_t count, loff_t * data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187{
Len Brown4be44fc2005-08-05 00:44:28 -04001188 int status;
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001189 struct seq_file *m = file->private_data;
1190 struct acpi_video_device *dev = m->private;
Len Brown4be44fc2005-08-05 00:44:28 -04001191 char str[12] = { 0 };
1192 u32 state = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
1195 if (!dev || count + 1 > sizeof str)
Patrick Mocheld550d982006-06-27 00:41:40 -04001196 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197
1198 if (copy_from_user(str, buffer, count))
Patrick Mocheld550d982006-06-27 00:41:40 -04001199 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
1201 str[count] = 0;
1202 state = simple_strtoul(str, NULL, 0);
Len Brown4be44fc2005-08-05 00:44:28 -04001203 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
1205 status = acpi_video_device_set_state(dev, state);
1206
1207 if (status)
Patrick Mocheld550d982006-06-27 00:41:40 -04001208 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
Patrick Mocheld550d982006-06-27 00:41:40 -04001210 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211}
1212
1213static int
Len Brown4be44fc2005-08-05 00:44:28 -04001214acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001216 struct acpi_video_device *dev = seq->private;
Len Brown4be44fc2005-08-05 00:44:28 -04001217 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219
1220 if (!dev || !dev->brightness) {
1221 seq_printf(seq, "<not supported>\n");
Patrick Mocheld550d982006-06-27 00:41:40 -04001222 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 }
1224
1225 seq_printf(seq, "levels: ");
Zhao Yakui0a3db1c2009-02-02 11:33:41 +08001226 for (i = 2; i < dev->brightness->count; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 seq_printf(seq, " %d", dev->brightness->levels[i]);
1228 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1229
Patrick Mocheld550d982006-06-27 00:41:40 -04001230 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231}
1232
1233static int
Len Brown4be44fc2005-08-05 00:44:28 -04001234acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235{
1236 return single_open(file, acpi_video_device_brightness_seq_show,
1237 PDE(inode)->data);
1238}
1239
1240static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -04001241acpi_video_device_write_brightness(struct file *file,
1242 const char __user * buffer,
1243 size_t count, loff_t * data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001245 struct seq_file *m = file->private_data;
1246 struct acpi_video_device *dev = m->private;
Danny Baumannc88c5782007-11-02 13:47:53 +01001247 char str[5] = { 0 };
Len Brown4be44fc2005-08-05 00:44:28 -04001248 unsigned int level = 0;
1249 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251
Thomas Renninger59d399d2005-11-08 05:27:00 -05001252 if (!dev || !dev->brightness || count + 1 > sizeof str)
Patrick Mocheld550d982006-06-27 00:41:40 -04001253 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
1255 if (copy_from_user(str, buffer, count))
Patrick Mocheld550d982006-06-27 00:41:40 -04001256 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
1258 str[count] = 0;
1259 level = simple_strtoul(str, NULL, 0);
Len Brown4be44fc2005-08-05 00:44:28 -04001260
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 if (level > 100)
Patrick Mocheld550d982006-06-27 00:41:40 -04001262 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263
Julius Volz98fb8fe2007-02-20 16:38:40 +01001264 /* validate through the list of available levels */
Zhao Yakui0a3db1c2009-02-02 11:33:41 +08001265 for (i = 2; i < dev->brightness->count; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 if (level == dev->brightness->levels[i]) {
Zhang Rui24450c72009-03-18 16:27:10 +08001267 if (!acpi_video_device_lcd_set_level(dev, level))
1268 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 break;
1270 }
1271
Zhang Rui24450c72009-03-18 16:27:10 +08001272 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273}
1274
Len Brown4be44fc2005-08-05 00:44:28 -04001275static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001277 struct acpi_video_device *dev = seq->private;
Len Brown4be44fc2005-08-05 00:44:28 -04001278 int status;
1279 int i;
1280 union acpi_object *edid = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
1283 if (!dev)
1284 goto out;
1285
Len Brown4be44fc2005-08-05 00:44:28 -04001286 status = acpi_video_device_EDID(dev, &edid, 128);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -04001288 status = acpi_video_device_EDID(dev, &edid, 256);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 }
1290
1291 if (ACPI_FAILURE(status)) {
1292 goto out;
1293 }
1294
1295 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1296 for (i = 0; i < edid->buffer.length; i++)
1297 seq_putc(seq, edid->buffer.pointer[i]);
1298 }
1299
Len Brown4be44fc2005-08-05 00:44:28 -04001300 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 if (!edid)
1302 seq_printf(seq, "<not supported>\n");
1303 else
1304 kfree(edid);
1305
Patrick Mocheld550d982006-06-27 00:41:40 -04001306 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307}
1308
1309static int
Len Brown4be44fc2005-08-05 00:44:28 -04001310acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311{
1312 return single_open(file, acpi_video_device_EDID_seq_show,
1313 PDE(inode)->data);
1314}
1315
Len Brown4be44fc2005-08-05 00:44:28 -04001316static int acpi_video_device_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317{
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001318 struct proc_dir_entry *entry, *device_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 struct acpi_video_device *vid_dev;
1320
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001321 vid_dev = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 if (!vid_dev)
Patrick Mocheld550d982006-06-27 00:41:40 -04001323 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001325 device_dir = proc_mkdir(acpi_device_bid(device),
1326 vid_dev->video->dir);
1327 if (!device_dir)
1328 return -ENOMEM;
1329
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 /* 'info' [R] */
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001331 entry = proc_create_data("info", S_IRUGO, device_dir,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001332 &acpi_video_device_info_fops, acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 if (!entry)
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001334 goto err_remove_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335
1336 /* 'state' [R/W] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001337 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001338 device_dir,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001339 &acpi_video_device_state_fops,
1340 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 if (!entry)
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001342 goto err_remove_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343
1344 /* 'brightness' [R/W] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001345 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001346 device_dir,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001347 &acpi_video_device_brightness_fops,
1348 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 if (!entry)
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001350 goto err_remove_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351
1352 /* 'EDID' [R] */
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001353 entry = proc_create_data("EDID", S_IRUGO, device_dir,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001354 &acpi_video_device_EDID_fops,
1355 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 if (!entry)
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001357 goto err_remove_brightness;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001359 acpi_device_dir(device) = device_dir;
1360
Patrick Mocheld550d982006-06-27 00:41:40 -04001361 return 0;
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001362
1363 err_remove_brightness:
1364 remove_proc_entry("brightness", device_dir);
1365 err_remove_state:
1366 remove_proc_entry("state", device_dir);
1367 err_remove_info:
1368 remove_proc_entry("info", device_dir);
1369 err_remove_dir:
1370 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1371 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372}
1373
Len Brown4be44fc2005-08-05 00:44:28 -04001374static int acpi_video_device_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375{
1376 struct acpi_video_device *vid_dev;
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001377 struct proc_dir_entry *device_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001379 vid_dev = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
Patrick Mocheld550d982006-06-27 00:41:40 -04001381 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001383 device_dir = acpi_device_dir(device);
1384 if (device_dir) {
1385 remove_proc_entry("info", device_dir);
1386 remove_proc_entry("state", device_dir);
1387 remove_proc_entry("brightness", device_dir);
1388 remove_proc_entry("EDID", device_dir);
Len Brown4be44fc2005-08-05 00:44:28 -04001389 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 acpi_device_dir(device) = NULL;
1391 }
1392
Patrick Mocheld550d982006-06-27 00:41:40 -04001393 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394}
1395
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396/* video bus */
Len Brown4be44fc2005-08-05 00:44:28 -04001397static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001399 struct acpi_video_bus *video = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
1402 if (!video)
1403 goto end;
1404
1405 seq_printf(seq, "Switching heads: %s\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001406 video->flags.multihead ? "yes" : "no");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 seq_printf(seq, "Video ROM: %s\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001408 video->flags.rom ? "yes" : "no");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 seq_printf(seq, "Device to be POSTed on boot: %s\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001410 video->flags.post ? "yes" : "no");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411
Len Brown4be44fc2005-08-05 00:44:28 -04001412 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001413 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414}
1415
Len Brown4be44fc2005-08-05 00:44:28 -04001416static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417{
Len Brown4be44fc2005-08-05 00:44:28 -04001418 return single_open(file, acpi_video_bus_info_seq_show,
1419 PDE(inode)->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420}
1421
Len Brown4be44fc2005-08-05 00:44:28 -04001422static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001424 struct acpi_video_bus *video = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426
1427 if (!video)
1428 goto end;
1429
Harvey Harrison96b2dd12008-03-05 18:24:51 -08001430 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 seq_printf(seq, "<TODO>\n");
1432
Len Brown4be44fc2005-08-05 00:44:28 -04001433 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001434 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435}
1436
Len Brown4be44fc2005-08-05 00:44:28 -04001437static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438{
1439 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1440}
1441
Len Brown4be44fc2005-08-05 00:44:28 -04001442static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001444 struct acpi_video_bus *video = seq->private;
Matthew Wilcox27663c52008-10-10 02:22:59 -04001445 unsigned long long options;
Len Brown4be44fc2005-08-05 00:44:28 -04001446 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448
1449 if (!video)
1450 goto end;
1451
1452 status = acpi_video_bus_POST_options(video, &options);
1453 if (ACPI_SUCCESS(status)) {
1454 if (!(options & 1)) {
Len Brown4be44fc2005-08-05 00:44:28 -04001455 printk(KERN_WARNING PREFIX
1456 "The motherboard VGA device is not listed as a possible POST device.\n");
1457 printk(KERN_WARNING PREFIX
Julius Volz98fb8fe2007-02-20 16:38:40 +01001458 "This indicates a BIOS bug. Please contact the manufacturer.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 }
Frank Seidel4d939152009-02-04 17:03:07 +01001460 printk(KERN_WARNING "%llx\n", options);
Julius Volz98fb8fe2007-02-20 16:38:40 +01001461 seq_printf(seq, "can POST: <integrated video>");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 if (options & 2)
1463 seq_printf(seq, " <PCI video>");
1464 if (options & 4)
1465 seq_printf(seq, " <AGP video>");
1466 seq_putc(seq, '\n');
1467 } else
1468 seq_printf(seq, "<not supported>\n");
Len Brown4be44fc2005-08-05 00:44:28 -04001469 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001470 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471}
1472
1473static int
Len Brown4be44fc2005-08-05 00:44:28 -04001474acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475{
Len Brown4be44fc2005-08-05 00:44:28 -04001476 return single_open(file, acpi_video_bus_POST_info_seq_show,
1477 PDE(inode)->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478}
1479
Len Brown4be44fc2005-08-05 00:44:28 -04001480static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001482 struct acpi_video_bus *video = seq->private;
Len Brown4be44fc2005-08-05 00:44:28 -04001483 int status;
Matthew Wilcox27663c52008-10-10 02:22:59 -04001484 unsigned long long id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486
1487 if (!video)
1488 goto end;
1489
Len Brown4be44fc2005-08-05 00:44:28 -04001490 status = acpi_video_bus_get_POST(video, &id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 if (!ACPI_SUCCESS(status)) {
1492 seq_printf(seq, "<not supported>\n");
1493 goto end;
1494 }
Julius Volz98fb8fe2007-02-20 16:38:40 +01001495 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496
Len Brown4be44fc2005-08-05 00:44:28 -04001497 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001498 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499}
1500
Len Brown4be44fc2005-08-05 00:44:28 -04001501static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001503 struct acpi_video_bus *video = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505
Len Brown4be44fc2005-08-05 00:44:28 -04001506 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507
Patrick Mocheld550d982006-06-27 00:41:40 -04001508 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509}
1510
Len Brown4be44fc2005-08-05 00:44:28 -04001511static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512{
Len Brown4be44fc2005-08-05 00:44:28 -04001513 return single_open(file, acpi_video_bus_POST_seq_show,
1514 PDE(inode)->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515}
1516
Len Brown4be44fc2005-08-05 00:44:28 -04001517static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518{
1519 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1520}
1521
1522static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -04001523acpi_video_bus_write_POST(struct file *file,
1524 const char __user * buffer,
1525 size_t count, loff_t * data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526{
Len Brown4be44fc2005-08-05 00:44:28 -04001527 int status;
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001528 struct seq_file *m = file->private_data;
1529 struct acpi_video_bus *video = m->private;
Len Brown4be44fc2005-08-05 00:44:28 -04001530 char str[12] = { 0 };
Matthew Wilcox27663c52008-10-10 02:22:59 -04001531 unsigned long long opt, options;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 if (!video || count + 1 > sizeof str)
Patrick Mocheld550d982006-06-27 00:41:40 -04001535 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536
1537 status = acpi_video_bus_POST_options(video, &options);
1538 if (!ACPI_SUCCESS(status))
Patrick Mocheld550d982006-06-27 00:41:40 -04001539 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540
1541 if (copy_from_user(str, buffer, count))
Patrick Mocheld550d982006-06-27 00:41:40 -04001542 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543
1544 str[count] = 0;
1545 opt = strtoul(str, NULL, 0);
1546 if (opt > 3)
Patrick Mocheld550d982006-06-27 00:41:40 -04001547 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548
Julius Volz98fb8fe2007-02-20 16:38:40 +01001549 /* just in case an OEM 'forgot' the motherboard... */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 options |= 1;
1551
1552 if (options & (1ul << opt)) {
Len Brown4be44fc2005-08-05 00:44:28 -04001553 status = acpi_video_bus_set_POST(video, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 if (!ACPI_SUCCESS(status))
Patrick Mocheld550d982006-06-27 00:41:40 -04001555 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556
1557 }
1558
Patrick Mocheld550d982006-06-27 00:41:40 -04001559 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560}
1561
1562static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -04001563acpi_video_bus_write_DOS(struct file *file,
1564 const char __user * buffer,
1565 size_t count, loff_t * data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566{
Len Brown4be44fc2005-08-05 00:44:28 -04001567 int status;
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001568 struct seq_file *m = file->private_data;
1569 struct acpi_video_bus *video = m->private;
Len Brown4be44fc2005-08-05 00:44:28 -04001570 char str[12] = { 0 };
1571 unsigned long opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 if (!video || count + 1 > sizeof str)
Patrick Mocheld550d982006-06-27 00:41:40 -04001575 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576
1577 if (copy_from_user(str, buffer, count))
Patrick Mocheld550d982006-06-27 00:41:40 -04001578 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579
1580 str[count] = 0;
1581 opt = strtoul(str, NULL, 0);
1582 if (opt > 7)
Patrick Mocheld550d982006-06-27 00:41:40 -04001583 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584
Len Brown4be44fc2005-08-05 00:44:28 -04001585 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586
1587 if (!ACPI_SUCCESS(status))
Patrick Mocheld550d982006-06-27 00:41:40 -04001588 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589
Patrick Mocheld550d982006-06-27 00:41:40 -04001590 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591}
1592
Len Brown4be44fc2005-08-05 00:44:28 -04001593static int acpi_video_bus_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594{
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001595 struct acpi_video_bus *video = acpi_driver_data(device);
1596 struct proc_dir_entry *device_dir;
1597 struct proc_dir_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001599 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1600 if (!device_dir)
1601 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 /* 'info' [R] */
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001604 entry = proc_create_data("info", S_IRUGO, device_dir,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001605 &acpi_video_bus_info_fops,
1606 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 if (!entry)
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001608 goto err_remove_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609
1610 /* 'ROM' [R] */
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001611 entry = proc_create_data("ROM", S_IRUGO, device_dir,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001612 &acpi_video_bus_ROM_fops,
1613 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 if (!entry)
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001615 goto err_remove_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616
1617 /* 'POST_info' [R] */
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001618 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001619 &acpi_video_bus_POST_info_fops,
1620 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 if (!entry)
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001622 goto err_remove_rom;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623
1624 /* 'POST' [R/W] */
Linus Torvalds08acd4f82008-04-30 11:52:52 -07001625 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001626 device_dir,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001627 &acpi_video_bus_POST_fops,
1628 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629 if (!entry)
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001630 goto err_remove_post_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631
1632 /* 'DOS' [R/W] */
Linus Torvalds08acd4f82008-04-30 11:52:52 -07001633 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
Alexey Dobriyane0066c4e2008-05-01 04:10:02 +04001634 device_dir,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001635 &acpi_video_bus_DOS_fops,
1636 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 if (!entry)
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001638 goto err_remove_post;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001640 video->dir = acpi_device_dir(device) = device_dir;
Patrick Mocheld550d982006-06-27 00:41:40 -04001641 return 0;
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001642
1643 err_remove_post:
1644 remove_proc_entry("POST", device_dir);
1645 err_remove_post_info:
1646 remove_proc_entry("POST_info", device_dir);
1647 err_remove_rom:
1648 remove_proc_entry("ROM", device_dir);
1649 err_remove_info:
1650 remove_proc_entry("info", device_dir);
1651 err_remove_dir:
1652 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1653 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654}
1655
Len Brown4be44fc2005-08-05 00:44:28 -04001656static int acpi_video_bus_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657{
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001658 struct proc_dir_entry *device_dir = acpi_device_dir(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659
Dmitry Torokhov251cb0b2007-11-05 11:43:34 -05001660 if (device_dir) {
1661 remove_proc_entry("info", device_dir);
1662 remove_proc_entry("ROM", device_dir);
1663 remove_proc_entry("POST_info", device_dir);
1664 remove_proc_entry("POST", device_dir);
1665 remove_proc_entry("DOS", device_dir);
Len Brown4be44fc2005-08-05 00:44:28 -04001666 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667 acpi_device_dir(device) = NULL;
1668 }
1669
Patrick Mocheld550d982006-06-27 00:41:40 -04001670 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671}
1672
1673/* --------------------------------------------------------------------------
1674 Driver Interface
1675 -------------------------------------------------------------------------- */
1676
1677/* device interface */
Rui Zhang82cae992007-01-03 23:40:53 -05001678static struct acpi_video_device_attrib*
1679acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1680{
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001681 struct acpi_video_enumerated_device *ids;
1682 int i;
Rui Zhang82cae992007-01-03 23:40:53 -05001683
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001684 for (i = 0; i < video->attached_count; i++) {
1685 ids = &video->attached_array[i];
1686 if ((ids->value.int_val & 0xffff) == device_id)
1687 return &ids->value.attrib;
1688 }
1689
Rui Zhang82cae992007-01-03 23:40:53 -05001690 return NULL;
1691}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692
1693static int
Len Brown4be44fc2005-08-05 00:44:28 -04001694acpi_video_bus_get_one_device(struct acpi_device *device,
1695 struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696{
Matthew Wilcox27663c52008-10-10 02:22:59 -04001697 unsigned long long device_id;
Yu, Luming973bf492006-04-27 05:25:00 -04001698 int status;
Len Brown4be44fc2005-08-05 00:44:28 -04001699 struct acpi_video_device *data;
Rui Zhang82cae992007-01-03 23:40:53 -05001700 struct acpi_video_device_attrib* attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701
1702 if (!device || !video)
Patrick Mocheld550d982006-06-27 00:41:40 -04001703 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
Len Brown4be44fc2005-08-05 00:44:28 -04001705 status =
1706 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707 if (ACPI_SUCCESS(status)) {
1708
Burman Yan36bcbec2006-12-19 12:56:11 -08001709 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710 if (!data)
Patrick Mocheld550d982006-06-27 00:41:40 -04001711 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1714 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07001715 device->driver_data = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716
1717 data->device_id = device_id;
1718 data->video = video;
1719 data->dev = device;
1720
Rui Zhang82cae992007-01-03 23:40:53 -05001721 attribute = acpi_video_get_device_attr(video, device_id);
1722
1723 if((attribute != NULL) && attribute->device_id_scheme) {
1724 switch (attribute->display_type) {
1725 case ACPI_VIDEO_DISPLAY_CRT:
1726 data->flags.crt = 1;
1727 break;
1728 case ACPI_VIDEO_DISPLAY_TV:
1729 data->flags.tvout = 1;
1730 break;
1731 case ACPI_VIDEO_DISPLAY_DVI:
1732 data->flags.dvi = 1;
1733 break;
1734 case ACPI_VIDEO_DISPLAY_LCD:
1735 data->flags.lcd = 1;
1736 break;
1737 default:
1738 data->flags.unknown = 1;
1739 break;
1740 }
1741 if(attribute->bios_can_detect)
1742 data->flags.bios = 1;
1743 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 data->flags.unknown = 1;
Len Brown4be44fc2005-08-05 00:44:28 -04001745
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 acpi_video_device_bind(video, data);
1747 acpi_video_device_find_cap(data);
1748
Patrick Mochel90130262006-05-19 16:54:48 -04001749 status = acpi_install_notify_handler(device->handle,
Len Brown4be44fc2005-08-05 00:44:28 -04001750 ACPI_DEVICE_NOTIFY,
1751 acpi_video_device_notify,
1752 data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 if (ACPI_FAILURE(status)) {
Lin Ming55ac9a02008-09-28 14:51:56 +08001754 printk(KERN_ERR PREFIX
1755 "Error installing notify handler\n");
Yu, Luming973bf492006-04-27 05:25:00 -04001756 if(data->brightness)
1757 kfree(data->brightness->levels);
1758 kfree(data->brightness);
1759 kfree(data);
1760 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 }
1762
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001763 mutex_lock(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764 list_add_tail(&data->entry, &video->video_device_list);
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001765 mutex_unlock(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766
1767 acpi_video_device_add_fs(device);
1768
Patrick Mocheld550d982006-06-27 00:41:40 -04001769 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770 }
1771
Patrick Mocheld550d982006-06-27 00:41:40 -04001772 return -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773}
1774
1775/*
1776 * Arg:
1777 * video : video bus device
1778 *
1779 * Return:
1780 * none
1781 *
1782 * Enumerate the video device list of the video bus,
1783 * bind the ids with the corresponding video devices
1784 * under the video bus.
Len Brown4be44fc2005-08-05 00:44:28 -04001785 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786
Len Brown4be44fc2005-08-05 00:44:28 -04001787static void acpi_video_device_rebind(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788{
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001789 struct acpi_video_device *dev;
1790
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001791 mutex_lock(&video->device_list_lock);
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001792
1793 list_for_each_entry(dev, &video->video_device_list, entry)
Len Brown4be44fc2005-08-05 00:44:28 -04001794 acpi_video_device_bind(video, dev);
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001795
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001796 mutex_unlock(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797}
1798
1799/*
1800 * Arg:
1801 * video : video bus device
1802 * device : video output device under the video
1803 * bus
1804 *
1805 * Return:
1806 * none
1807 *
1808 * Bind the ids with the corresponding video devices
1809 * under the video bus.
Len Brown4be44fc2005-08-05 00:44:28 -04001810 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811
1812static void
Len Brown4be44fc2005-08-05 00:44:28 -04001813acpi_video_device_bind(struct acpi_video_bus *video,
1814 struct acpi_video_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815{
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001816 struct acpi_video_enumerated_device *ids;
Len Brown4be44fc2005-08-05 00:44:28 -04001817 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001819 for (i = 0; i < video->attached_count; i++) {
1820 ids = &video->attached_array[i];
1821 if (device->device_id == (ids->value.int_val & 0xffff)) {
1822 ids->bind_info = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1824 }
1825 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826}
1827
1828/*
1829 * Arg:
1830 * video : video bus device
1831 *
1832 * Return:
1833 * < 0 : error
1834 *
1835 * Call _DOD to enumerate all devices attached to display adapter
1836 *
Len Brown4be44fc2005-08-05 00:44:28 -04001837 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838
1839static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1840{
Len Brown4be44fc2005-08-05 00:44:28 -04001841 int status;
1842 int count;
1843 int i;
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001844 struct acpi_video_enumerated_device *active_list;
Len Brown4be44fc2005-08-05 00:44:28 -04001845 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1846 union acpi_object *dod = NULL;
1847 union acpi_object *obj;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848
Patrick Mochel90130262006-05-19 16:54:48 -04001849 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850 if (!ACPI_SUCCESS(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -04001851 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
Patrick Mocheld550d982006-06-27 00:41:40 -04001852 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853 }
1854
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001855 dod = buffer.pointer;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -04001857 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 status = -EFAULT;
1859 goto out;
1860 }
1861
1862 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001863 dod->package.count));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001865 active_list = kcalloc(1 + dod->package.count,
1866 sizeof(struct acpi_video_enumerated_device),
1867 GFP_KERNEL);
1868 if (!active_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869 status = -ENOMEM;
1870 goto out;
1871 }
1872
1873 count = 0;
1874 for (i = 0; i < dod->package.count; i++) {
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001875 obj = &dod->package.elements[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876
1877 if (obj->type != ACPI_TYPE_INTEGER) {
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001878 printk(KERN_ERR PREFIX
1879 "Invalid _DOD data in element %d\n", i);
1880 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 }
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001882
1883 active_list[count].value.int_val = obj->integer.value;
1884 active_list[count].bind_info = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -04001885 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1886 (int)obj->integer.value));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 count++;
1888 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889
Jesper Juhl6044ec82005-11-07 01:01:32 -08001890 kfree(video->attached_array);
Len Brown4be44fc2005-08-05 00:44:28 -04001891
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001892 video->attached_array = active_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 video->attached_count = count;
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001894
1895 out:
Len Brown02438d82006-06-30 03:19:10 -04001896 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -04001897 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898}
1899
Len Brown4be44fc2005-08-05 00:44:28 -04001900static int
1901acpi_video_get_next_level(struct acpi_video_device *device,
1902 u32 level_current, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903{
Alexey Starikovskiy63f0edf2007-09-03 16:30:08 +04001904 int min, max, min_above, max_below, i, l, delta = 255;
Thomas Tuttlef4715182006-12-19 12:56:14 -08001905 max = max_below = 0;
1906 min = min_above = 255;
Alexey Starikovskiy63f0edf2007-09-03 16:30:08 +04001907 /* Find closest level to level_current */
Zhao Yakui0a3db1c2009-02-02 11:33:41 +08001908 for (i = 2; i < device->brightness->count; i++) {
Alexey Starikovskiy63f0edf2007-09-03 16:30:08 +04001909 l = device->brightness->levels[i];
1910 if (abs(l - level_current) < abs(delta)) {
1911 delta = l - level_current;
1912 if (!delta)
1913 break;
1914 }
1915 }
1916 /* Ajust level_current to closest available level */
1917 level_current += delta;
Zhao Yakui0a3db1c2009-02-02 11:33:41 +08001918 for (i = 2; i < device->brightness->count; i++) {
Thomas Tuttlef4715182006-12-19 12:56:14 -08001919 l = device->brightness->levels[i];
1920 if (l < min)
1921 min = l;
1922 if (l > max)
1923 max = l;
1924 if (l < min_above && l > level_current)
1925 min_above = l;
1926 if (l > max_below && l < level_current)
1927 max_below = l;
1928 }
1929
1930 switch (event) {
1931 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1932 return (level_current < max) ? min_above : min;
1933 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1934 return (level_current < max) ? min_above : max;
1935 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1936 return (level_current > min) ? max_below : min;
1937 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1938 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1939 return 0;
1940 default:
1941 return level_current;
1942 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943}
1944
Zhang Ruic8890f92009-03-18 16:27:08 +08001945static int
Len Brown4be44fc2005-08-05 00:44:28 -04001946acpi_video_switch_brightness(struct acpi_video_device *device, int event)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947{
Matthew Wilcox27663c52008-10-10 02:22:59 -04001948 unsigned long long level_current, level_next;
Zhang Ruic8890f92009-03-18 16:27:08 +08001949 int result = -EINVAL;
1950
Julia Jomantaite469778c2008-06-23 22:50:42 +01001951 if (!device->brightness)
Zhang Ruic8890f92009-03-18 16:27:08 +08001952 goto out;
1953
1954 result = acpi_video_device_lcd_get_level_current(device,
1955 &level_current);
1956 if (result)
1957 goto out;
1958
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959 level_next = acpi_video_get_next_level(device, level_current, event);
Zhang Ruic8890f92009-03-18 16:27:08 +08001960
Zhang Rui24450c72009-03-18 16:27:10 +08001961 result = acpi_video_device_lcd_set_level(device, level_next);
Zhang Ruic8890f92009-03-18 16:27:08 +08001962
1963out:
1964 if (result)
1965 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1966
1967 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968}
1969
1970static int
Len Brown4be44fc2005-08-05 00:44:28 -04001971acpi_video_bus_get_devices(struct acpi_video_bus *video,
1972 struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973{
Len Brown4be44fc2005-08-05 00:44:28 -04001974 int status = 0;
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001975 struct acpi_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976
1977 acpi_video_device_enumerate(video);
1978
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001979 list_for_each_entry(dev, &device->children, node) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980
1981 status = acpi_video_bus_get_one_device(dev, video);
1982 if (ACPI_FAILURE(status)) {
Lin Ming55ac9a02008-09-28 14:51:56 +08001983 printk(KERN_WARNING PREFIX
1984 "Cant attach device");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 continue;
1986 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 }
Patrick Mocheld550d982006-06-27 00:41:40 -04001988 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989}
1990
Len Brown4be44fc2005-08-05 00:44:28 -04001991static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992{
Karol Kozimor031ec772005-07-30 04:18:00 -04001993 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 struct acpi_video_bus *video;
1995
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996
1997 if (!device || !device->video)
Patrick Mocheld550d982006-06-27 00:41:40 -04001998 return -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999
2000 video = device->video;
2001
Linus Torvalds1da177e2005-04-16 15:20:36 -07002002 acpi_video_device_remove_fs(device->dev);
2003
Patrick Mochel90130262006-05-19 16:54:48 -04002004 status = acpi_remove_notify_handler(device->dev->handle,
Len Brown4be44fc2005-08-05 00:44:28 -04002005 ACPI_DEVICE_NOTIFY,
2006 acpi_video_device_notify);
Keith Packarde29b3ee2009-08-06 15:57:54 -07002007 if (device->backlight) {
2008 sysfs_remove_link(&device->backlight->dev.kobj, "device");
2009 backlight_device_unregister(device->backlight);
2010 device->backlight = NULL;
2011 }
Zhang Rui702ed512008-01-17 15:51:22 +08002012 if (device->cdev) {
2013 sysfs_remove_link(&device->dev->dev.kobj,
2014 "thermal_cooling");
2015 sysfs_remove_link(&device->cdev->device.kobj,
2016 "device");
2017 thermal_cooling_device_unregister(device->cdev);
2018 device->cdev = NULL;
2019 }
Luming Yu23b0f012007-05-09 21:07:05 +08002020 video_output_unregister(device->output_dev);
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05002021
Patrick Mocheld550d982006-06-27 00:41:40 -04002022 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023}
2024
Len Brown4be44fc2005-08-05 00:44:28 -04002025static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026{
Len Brown4be44fc2005-08-05 00:44:28 -04002027 int status;
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05002028 struct acpi_video_device *dev, *next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05002030 mutex_lock(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05002032 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05002034 status = acpi_video_bus_put_one_device(dev);
Len Brown4be44fc2005-08-05 00:44:28 -04002035 if (ACPI_FAILURE(status))
2036 printk(KERN_WARNING PREFIX
2037 "hhuuhhuu bug in acpi video driver.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05002039 if (dev->brightness) {
2040 kfree(dev->brightness->levels);
2041 kfree(dev->brightness);
2042 }
2043 list_del(&dev->entry);
2044 kfree(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 }
2046
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05002047 mutex_unlock(&video->device_list_lock);
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05002048
Patrick Mocheld550d982006-06-27 00:41:40 -04002049 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050}
2051
2052/* acpi_video interface */
2053
Len Brown4be44fc2005-08-05 00:44:28 -04002054static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055{
Zhang Ruia21101c2007-09-14 11:46:22 +08002056 return acpi_video_bus_DOS(video, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057}
2058
Len Brown4be44fc2005-08-05 00:44:28 -04002059static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060{
2061 return acpi_video_bus_DOS(video, 0, 1);
2062}
2063
Bjorn Helgaas70155582009-04-07 15:37:11 +00002064static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065{
Bjorn Helgaas70155582009-04-07 15:37:11 +00002066 struct acpi_video_bus *video = acpi_driver_data(device);
Luming Yue9dab192007-08-20 18:23:53 +08002067 struct input_dev *input;
2068 int keycode;
2069
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070 if (!video)
Patrick Mocheld550d982006-06-27 00:41:40 -04002071 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072
Luming Yue9dab192007-08-20 18:23:53 +08002073 input = video->input;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074
2075 switch (event) {
Julius Volz98fb8fe2007-02-20 16:38:40 +01002076 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077 * most likely via hotkey. */
Len Brown14e04fb2007-08-23 15:20:26 -04002078 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002079 keycode = KEY_SWITCHVIDEOMODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 break;
2081
Julius Volz98fb8fe2007-02-20 16:38:40 +01002082 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083 * connector. */
2084 acpi_video_device_enumerate(video);
2085 acpi_video_device_rebind(video);
Len Brown14e04fb2007-08-23 15:20:26 -04002086 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002087 keycode = KEY_SWITCHVIDEOMODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088 break;
2089
Len Brown4be44fc2005-08-05 00:44:28 -04002090 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
Len Brown25c87f72007-08-25 01:44:01 -04002091 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002092 keycode = KEY_SWITCHVIDEOMODE;
2093 break;
Len Brown4be44fc2005-08-05 00:44:28 -04002094 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
Len Brown25c87f72007-08-25 01:44:01 -04002095 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002096 keycode = KEY_VIDEO_NEXT;
2097 break;
Len Brown4be44fc2005-08-05 00:44:28 -04002098 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
Len Brown14e04fb2007-08-23 15:20:26 -04002099 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002100 keycode = KEY_VIDEO_PREV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 break;
2102
2103 default:
Luming Yue9dab192007-08-20 18:23:53 +08002104 keycode = KEY_UNKNOWN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -04002106 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107 break;
2108 }
2109
Zhang Rui7761f632008-01-25 14:48:12 +08002110 acpi_notifier_call_chain(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002111 input_report_key(input, keycode, 1);
2112 input_sync(input);
2113 input_report_key(input, keycode, 0);
2114 input_sync(input);
2115
Patrick Mocheld550d982006-06-27 00:41:40 -04002116 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117}
2118
Len Brown4be44fc2005-08-05 00:44:28 -04002119static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02002121 struct acpi_video_device *video_device = data;
Len Brown4be44fc2005-08-05 00:44:28 -04002122 struct acpi_device *device = NULL;
Luming Yue9dab192007-08-20 18:23:53 +08002123 struct acpi_video_bus *bus;
2124 struct input_dev *input;
2125 int keycode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127 if (!video_device)
Patrick Mocheld550d982006-06-27 00:41:40 -04002128 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129
Patrick Mochele6afa0d2006-05-19 16:54:40 -04002130 device = video_device->dev;
Luming Yue9dab192007-08-20 18:23:53 +08002131 bus = video_device->video;
2132 input = bus->input;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133
2134 switch (event) {
Len Brown4be44fc2005-08-05 00:44:28 -04002135 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
Zhang Rui8a681a42008-01-25 14:47:49 +08002136 if (brightness_switch_enabled)
2137 acpi_video_switch_brightness(video_device, event);
Len Brown25c87f72007-08-25 01:44:01 -04002138 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002139 keycode = KEY_BRIGHTNESS_CYCLE;
2140 break;
Len Brown4be44fc2005-08-05 00:44:28 -04002141 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
Zhang Rui8a681a42008-01-25 14:47:49 +08002142 if (brightness_switch_enabled)
2143 acpi_video_switch_brightness(video_device, event);
Len Brown25c87f72007-08-25 01:44:01 -04002144 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002145 keycode = KEY_BRIGHTNESSUP;
2146 break;
Len Brown4be44fc2005-08-05 00:44:28 -04002147 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
Zhang Rui8a681a42008-01-25 14:47:49 +08002148 if (brightness_switch_enabled)
2149 acpi_video_switch_brightness(video_device, event);
Len Brown25c87f72007-08-25 01:44:01 -04002150 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002151 keycode = KEY_BRIGHTNESSDOWN;
2152 break;
Len Brown4be44fc2005-08-05 00:44:28 -04002153 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
Zhang Rui8a681a42008-01-25 14:47:49 +08002154 if (brightness_switch_enabled)
2155 acpi_video_switch_brightness(video_device, event);
Len Brown25c87f72007-08-25 01:44:01 -04002156 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002157 keycode = KEY_BRIGHTNESS_ZERO;
2158 break;
Len Brown4be44fc2005-08-05 00:44:28 -04002159 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
Zhang Rui8a681a42008-01-25 14:47:49 +08002160 if (brightness_switch_enabled)
2161 acpi_video_switch_brightness(video_device, event);
Len Brown14e04fb2007-08-23 15:20:26 -04002162 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002163 keycode = KEY_DISPLAY_OFF;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164 break;
2165 default:
Luming Yue9dab192007-08-20 18:23:53 +08002166 keycode = KEY_UNKNOWN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -04002168 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169 break;
2170 }
Luming Yue9dab192007-08-20 18:23:53 +08002171
Zhang Rui7761f632008-01-25 14:48:12 +08002172 acpi_notifier_call_chain(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08002173 input_report_key(input, keycode, 1);
2174 input_sync(input);
2175 input_report_key(input, keycode, 0);
2176 input_sync(input);
2177
Patrick Mocheld550d982006-06-27 00:41:40 -04002178 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179}
2180
Zhang Ruie6d9da12007-08-25 02:23:31 -04002181static int instance;
Matthew Garrett863c1492008-02-04 23:31:24 -08002182static int acpi_video_resume(struct acpi_device *device)
2183{
2184 struct acpi_video_bus *video;
2185 struct acpi_video_device *video_device;
2186 int i;
2187
2188 if (!device || !acpi_driver_data(device))
2189 return -EINVAL;
2190
2191 video = acpi_driver_data(device);
2192
2193 for (i = 0; i < video->attached_count; i++) {
2194 video_device = video->attached_array[i].bind_info;
2195 if (video_device && video_device->backlight)
2196 acpi_video_set_brightness(video_device->backlight);
2197 }
2198 return AE_OK;
2199}
2200
Len Brown4be44fc2005-08-05 00:44:28 -04002201static int acpi_video_bus_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202{
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002203 struct acpi_video_bus *video;
Luming Yue9dab192007-08-20 18:23:53 +08002204 struct input_dev *input;
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002205 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206
Burman Yan36bcbec2006-12-19 12:56:11 -08002207 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 if (!video)
Patrick Mocheld550d982006-06-27 00:41:40 -04002209 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210
Zhang Ruie6d9da12007-08-25 02:23:31 -04002211 /* a hack to fix the duplicate name "VID" problem on T61 */
2212 if (!strcmp(device->pnp.bus_id, "VID")) {
2213 if (instance)
2214 device->pnp.bus_id[3] = '0' + instance;
2215 instance ++;
2216 }
Zhao Yakuif3b39f12009-02-02 22:55:01 -05002217 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2218 if (!strcmp(device->pnp.bus_id, "VGA")) {
2219 if (instance)
2220 device->pnp.bus_id[3] = '0' + instance;
2221 instance++;
2222 }
Zhang Ruie6d9da12007-08-25 02:23:31 -04002223
Patrick Mochele6afa0d2006-05-19 16:54:40 -04002224 video->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2226 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07002227 device->driver_data = video;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228
2229 acpi_video_bus_find_cap(video);
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002230 error = acpi_video_bus_check(video);
2231 if (error)
2232 goto err_free_video;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002233
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002234 error = acpi_video_bus_add_fs(device);
2235 if (error)
2236 goto err_free_video;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002237
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05002238 mutex_init(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239 INIT_LIST_HEAD(&video->video_device_list);
2240
2241 acpi_video_bus_get_devices(video, device);
2242 acpi_video_bus_start_devices(video);
2243
Luming Yue9dab192007-08-20 18:23:53 +08002244 video->input = input = input_allocate_device();
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002245 if (!input) {
2246 error = -ENOMEM;
Bjorn Helgaas70155582009-04-07 15:37:11 +00002247 goto err_stop_video;
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002248 }
Luming Yue9dab192007-08-20 18:23:53 +08002249
2250 snprintf(video->phys, sizeof(video->phys),
2251 "%s/video/input0", acpi_device_hid(video->device));
2252
2253 input->name = acpi_device_name(video->device);
2254 input->phys = video->phys;
2255 input->id.bustype = BUS_HOST;
2256 input->id.product = 0x06;
Dmitry Torokhov91c05c62007-11-05 11:43:29 -05002257 input->dev.parent = &device->dev;
Luming Yue9dab192007-08-20 18:23:53 +08002258 input->evbit[0] = BIT(EV_KEY);
2259 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2260 set_bit(KEY_VIDEO_NEXT, input->keybit);
2261 set_bit(KEY_VIDEO_PREV, input->keybit);
2262 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2263 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2264 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2265 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2266 set_bit(KEY_DISPLAY_OFF, input->keybit);
2267 set_bit(KEY_UNKNOWN, input->keybit);
Luming Yue9dab192007-08-20 18:23:53 +08002268
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002269 error = input_register_device(input);
2270 if (error)
2271 goto err_free_input_dev;
Luming Yue9dab192007-08-20 18:23:53 +08002272
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
Len Brown4be44fc2005-08-05 00:44:28 -04002274 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2275 video->flags.multihead ? "yes" : "no",
2276 video->flags.rom ? "yes" : "no",
2277 video->flags.post ? "yes" : "no");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002279 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002280
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002281 err_free_input_dev:
2282 input_free_device(input);
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002283 err_stop_video:
2284 acpi_video_bus_stop_devices(video);
2285 acpi_video_bus_put_devices(video);
2286 kfree(video->attached_array);
2287 acpi_video_bus_remove_fs(device);
2288 err_free_video:
2289 kfree(video);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07002290 device->driver_data = NULL;
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05002291
2292 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293}
2294
Len Brown4be44fc2005-08-05 00:44:28 -04002295static int acpi_video_bus_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296{
Len Brown4be44fc2005-08-05 00:44:28 -04002297 struct acpi_video_bus *video = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299
2300 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04002301 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302
Jan Engelhardt50dd0962006-10-01 00:28:50 +02002303 video = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304
2305 acpi_video_bus_stop_devices(video);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002306 acpi_video_bus_put_devices(video);
2307 acpi_video_bus_remove_fs(device);
2308
Luming Yue9dab192007-08-20 18:23:53 +08002309 input_unregister_device(video->input);
Jesper Juhl6044ec82005-11-07 01:01:32 -08002310 kfree(video->attached_array);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311 kfree(video);
2312
Patrick Mocheld550d982006-06-27 00:41:40 -04002313 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314}
2315
Matthew Garrett74a365b2009-03-19 21:35:39 +00002316static int __init intel_opregion_present(void)
2317{
2318#if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2319 struct pci_dev *dev = NULL;
2320 u32 address;
2321
2322 for_each_pci_dev(dev) {
2323 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2324 continue;
2325 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2326 continue;
2327 pci_read_config_dword(dev, 0xfc, &address);
2328 if (!address)
2329 continue;
2330 return 1;
2331 }
2332#endif
2333 return 0;
2334}
2335
2336int acpi_video_register(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002337{
Len Brown4be44fc2005-08-05 00:44:28 -04002338 int result = 0;
Zhao Yakui86e437f2009-06-16 11:23:13 +08002339 if (register_count) {
2340 /*
2341 * if the function of acpi_video_register is already called,
2342 * don't register the acpi_vide_bus again and return no error.
2343 */
2344 return 0;
2345 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2348 if (!acpi_video_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -04002349 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350
2351 result = acpi_bus_register_driver(&acpi_video_bus);
2352 if (result < 0) {
2353 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
Patrick Mocheld550d982006-06-27 00:41:40 -04002354 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 }
2356
Zhao Yakui86e437f2009-06-16 11:23:13 +08002357 /*
2358 * When the acpi_video_bus is loaded successfully, increase
2359 * the counter reference.
2360 */
2361 register_count = 1;
2362
Patrick Mocheld550d982006-06-27 00:41:40 -04002363 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364}
Matthew Garrett74a365b2009-03-19 21:35:39 +00002365EXPORT_SYMBOL(acpi_video_register);
2366
Zhao Yakui86e437f2009-06-16 11:23:13 +08002367void acpi_video_unregister(void)
2368{
2369 if (!register_count) {
2370 /*
2371 * If the acpi video bus is already unloaded, don't
2372 * unload it again and return directly.
2373 */
2374 return;
2375 }
2376 acpi_bus_unregister_driver(&acpi_video_bus);
2377
2378 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2379
2380 register_count = 0;
2381
2382 return;
2383}
2384EXPORT_SYMBOL(acpi_video_unregister);
2385
Matthew Garrett74a365b2009-03-19 21:35:39 +00002386/*
2387 * This is kind of nasty. Hardware using Intel chipsets may require
2388 * the video opregion code to be run first in order to initialise
2389 * state before any ACPI video calls are made. To handle this we defer
2390 * registration of the video class until the opregion code has run.
2391 */
2392
2393static int __init acpi_video_init(void)
2394{
Zhang Rui45cb50e2009-04-24 12:13:18 -04002395 dmi_check_system(video_dmi_table);
2396
Matthew Garrett74a365b2009-03-19 21:35:39 +00002397 if (intel_opregion_present())
2398 return 0;
2399
2400 return acpi_video_register();
2401}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402
Zhao Yakui86e437f2009-06-16 11:23:13 +08002403static void __exit acpi_video_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404{
Zhao Yakui86e437f2009-06-16 11:23:13 +08002405 acpi_video_unregister();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406
Patrick Mocheld550d982006-06-27 00:41:40 -04002407 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002408}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409
2410module_init(acpi_video_init);
2411module_exit(acpi_video_exit);