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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>
Luming Yue9dab192007-08-20 18:23:53 +080033#include <linux/input.h>
Yu Luming2f3d0002006-11-11 02:40:34 +080034#include <linux/backlight.h>
Zhang Rui702ed512008-01-17 15:51:22 +080035#include <linux/thermal.h>
Zhang Rui935e5f22008-12-11 16:24:52 -050036#include <linux/sort.h>
Matthew Garrett74a365b2009-03-19 21:35:39 +000037#include <linux/pci.h>
38#include <linux/pci_ids.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090039#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <asm/uaccess.h>
Len Browneb27cae2009-07-06 23:40:19 -040041#include <linux/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <acpi/acpi_bus.h>
43#include <acpi/acpi_drivers.h>
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +020044#include <linux/suspend.h>
Matthew Garrette92a7162010-01-12 14:17:03 -050045#include <acpi/video.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Len Browna192a952009-07-28 16:45:54 -040047#define PREFIX "ACPI: "
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#define ACPI_VIDEO_BUS_NAME "Video Bus"
50#define ACPI_VIDEO_DEVICE_NAME "Video Device"
51#define ACPI_VIDEO_NOTIFY_SWITCH 0x80
52#define ACPI_VIDEO_NOTIFY_PROBE 0x81
53#define ACPI_VIDEO_NOTIFY_CYCLE 0x82
54#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
55#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
56
Thomas Tuttlef4715182006-12-19 12:56:14 -080057#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
58#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
59#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
60#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
61#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Yu Luming2f3d0002006-11-11 02:40:34 +080063#define MAX_NAME_LEN 20
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#define _COMPONENT ACPI_VIDEO_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050066ACPI_MODULE_NAME("video");
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Len Brownf52fd662007-02-12 22:42:12 -050068MODULE_AUTHOR("Bruno Ducrot");
Len Brown7cda93e2007-02-12 23:50:02 -050069MODULE_DESCRIPTION("ACPI Video Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070070MODULE_LICENSE("GPL");
71
Rusty Russell90ab5ee2012-01-13 09:32:20 +103072static bool brightness_switch_enabled = 1;
Zhang Rui8a681a42008-01-25 14:47:49 +080073module_param(brightness_switch_enabled, bool, 0644);
74
Zhang Ruic504f8c2009-12-30 15:59:23 +080075/*
76 * By default, we don't allow duplicate ACPI video bus devices
77 * under the same VGA controller
78 */
Rusty Russell90ab5ee2012-01-13 09:32:20 +103079static bool allow_duplicates;
Zhang Ruic504f8c2009-12-30 15:59:23 +080080module_param(allow_duplicates, bool, 0644);
81
Zhang Rui99fd1892010-12-06 15:04:27 +080082/*
83 * Some BIOSes claim they use minimum backlight at boot,
84 * and this may bring dimming screen after boot
85 */
Rusty Russell90ab5ee2012-01-13 09:32:20 +103086static bool use_bios_initial_backlight = 1;
Zhang Rui99fd1892010-12-06 15:04:27 +080087module_param(use_bios_initial_backlight, bool, 0644);
88
Zhao Yakui86e437f2009-06-16 11:23:13 +080089static int register_count = 0;
Len Brown4be44fc2005-08-05 00:44:28 -040090static int acpi_video_bus_add(struct acpi_device *device);
91static int acpi_video_bus_remove(struct acpi_device *device, int type);
Bjorn Helgaas70155582009-04-07 15:37:11 +000092static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Thomas Renninger1ba90e32007-07-23 14:44:41 +020094static const struct acpi_device_id video_device_ids[] = {
95 {ACPI_VIDEO_HID, 0},
96 {"", 0},
97};
98MODULE_DEVICE_TABLE(acpi, video_device_ids);
99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100static struct acpi_driver acpi_video_bus = {
Len Brownc2b67052007-02-12 23:33:40 -0500101 .name = "video",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 .class = ACPI_VIDEO_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200103 .ids = video_device_ids,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 .ops = {
105 .add = acpi_video_bus_add,
106 .remove = acpi_video_bus_remove,
Bjorn Helgaas70155582009-04-07 15:37:11 +0000107 .notify = acpi_video_bus_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400108 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109};
110
111struct acpi_video_bus_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400112 u8 multihead:1; /* can switch video heads */
113 u8 rom:1; /* can retrieve a video rom */
114 u8 post:1; /* can configure the head to */
115 u8 reserved:5;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116};
117
118struct acpi_video_bus_cap {
Len Brown4be44fc2005-08-05 00:44:28 -0400119 u8 _DOS:1; /*Enable/Disable output switching */
120 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
121 u8 _ROM:1; /*Get ROM Data */
122 u8 _GPD:1; /*Get POST Device */
123 u8 _SPD:1; /*Set POST Device */
124 u8 _VPO:1; /*Video POST Options */
125 u8 reserved:2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126};
127
Len Brown4be44fc2005-08-05 00:44:28 -0400128struct acpi_video_device_attrib {
129 u32 display_index:4; /* A zero-based instance of the Display */
Julius Volz98fb8fe2007-02-20 16:38:40 +0100130 u32 display_port_attachment:4; /*This field differentiates the display type */
Len Brown4be44fc2005-08-05 00:44:28 -0400131 u32 display_type:4; /*Describe the specific type in use */
Julius Volz98fb8fe2007-02-20 16:38:40 +0100132 u32 vendor_specific:4; /*Chipset Vendor Specific */
Len Brown4be44fc2005-08-05 00:44:28 -0400133 u32 bios_can_detect:1; /*BIOS can detect the device */
134 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
135 the VGA device. */
136 u32 pipe_id:3; /*For VGA multiple-head devices. */
137 u32 reserved:10; /*Must be 0 */
138 u32 device_id_scheme:1; /*Device ID Scheme */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139};
140
141struct acpi_video_enumerated_device {
142 union {
143 u32 int_val;
Len Brown4be44fc2005-08-05 00:44:28 -0400144 struct acpi_video_device_attrib attrib;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 } value;
146 struct acpi_video_device *bind_info;
147};
148
149struct acpi_video_bus {
Patrick Mochele6afa0d2006-05-19 16:54:40 -0400150 struct acpi_device *device;
Len Brown4be44fc2005-08-05 00:44:28 -0400151 u8 dos_setting;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 struct acpi_video_enumerated_device *attached_array;
Len Brown4be44fc2005-08-05 00:44:28 -0400153 u8 attached_count;
154 struct acpi_video_bus_cap cap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 struct acpi_video_bus_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400156 struct list_head video_device_list;
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -0500157 struct mutex device_list_lock; /* protects video_device_list */
Luming Yue9dab192007-08-20 18:23:53 +0800158 struct input_dev *input;
159 char phys[32]; /* for input device */
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +0200160 struct notifier_block pm_nb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161};
162
163struct acpi_video_device_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400164 u8 crt:1;
165 u8 lcd:1;
166 u8 tvout:1;
Rui Zhang82cae992007-01-03 23:40:53 -0500167 u8 dvi:1;
Len Brown4be44fc2005-08-05 00:44:28 -0400168 u8 bios:1;
169 u8 unknown:1;
Rui Zhang82cae992007-01-03 23:40:53 -0500170 u8 reserved:2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171};
172
173struct acpi_video_device_cap {
Len Brown4be44fc2005-08-05 00:44:28 -0400174 u8 _ADR:1; /*Return the unique ID */
175 u8 _BCL:1; /*Query list of brightness control levels supported */
176 u8 _BCM:1; /*Set the brightness level */
Yu Luming2f3d0002006-11-11 02:40:34 +0800177 u8 _BQC:1; /* Get current brightness level */
Zhang Ruic60d6382009-03-18 16:27:18 +0800178 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
Len Brown4be44fc2005-08-05 00:44:28 -0400179 u8 _DDC:1; /*Return the EDID for this device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180};
181
Zhang Ruid32f6942009-03-18 16:27:12 +0800182struct acpi_video_brightness_flags {
183 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
Zhang Ruid80fb992009-03-18 16:27:14 +0800184 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
Zhang Rui1a7c6182009-03-18 16:27:16 +0800185 u8 _BCL_use_index:1; /* levels in _BCL are index values */
186 u8 _BCM_use_index:1; /* input of _BCM is an index value */
187 u8 _BQC_use_index:1; /* _BQC returns an index value */
Zhang Ruid32f6942009-03-18 16:27:12 +0800188};
189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190struct acpi_video_device_brightness {
Len Brown4be44fc2005-08-05 00:44:28 -0400191 int curr;
192 int count;
193 int *levels;
Zhang Ruid32f6942009-03-18 16:27:12 +0800194 struct acpi_video_brightness_flags flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195};
196
197struct acpi_video_device {
Len Brown4be44fc2005-08-05 00:44:28 -0400198 unsigned long device_id;
199 struct acpi_video_device_flags flags;
200 struct acpi_video_device_cap cap;
201 struct list_head entry;
202 struct acpi_video_bus *video;
203 struct acpi_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 struct acpi_video_device_brightness *brightness;
Yu Luming2f3d0002006-11-11 02:40:34 +0800205 struct backlight_device *backlight;
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400206 struct thermal_cooling_device *cooling_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207};
208
Jan Engelhardtb7171ae2009-01-12 00:08:19 +0100209static const char device_decode[][30] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 "motherboard VGA device",
211 "PCI VGA device",
212 "AGP VGA device",
213 "UNKNOWN",
214};
215
Len Brown4be44fc2005-08-05 00:44:28 -0400216static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
217static void acpi_video_device_rebind(struct acpi_video_bus *video);
218static void acpi_video_device_bind(struct acpi_video_bus *video,
219 struct acpi_video_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220static int acpi_video_device_enumerate(struct acpi_video_bus *video);
Yu Luming2f3d0002006-11-11 02:40:34 +0800221static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
222 int level);
223static int acpi_video_device_lcd_get_level_current(
224 struct acpi_video_device *device,
Matthew Garrett70287db2010-02-16 16:53:50 -0500225 unsigned long long *level, int init);
Len Brown4be44fc2005-08-05 00:44:28 -0400226static int acpi_video_get_next_level(struct acpi_video_device *device,
227 u32 level_current, u32 event);
Zhang Ruic8890f92009-03-18 16:27:08 +0800228static int acpi_video_switch_brightness(struct acpi_video_device *device,
Len Brown4be44fc2005-08-05 00:44:28 -0400229 int event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Yu Luming2f3d0002006-11-11 02:40:34 +0800231/*backlight device sysfs support*/
232static int acpi_video_get_brightness(struct backlight_device *bd)
233{
Matthew Wilcox27663c52008-10-10 02:22:59 -0400234 unsigned long long cur_level;
Matthew Garrett38531e62007-12-26 02:03:26 +0000235 int i;
Yu Luming2f3d0002006-11-11 02:40:34 +0800236 struct acpi_video_device *vd =
Richard Purdie655bfd72007-07-09 12:17:24 +0100237 (struct acpi_video_device *)bl_get_data(bd);
Zhang Ruic8890f92009-03-18 16:27:08 +0800238
Matthew Garrett70287db2010-02-16 16:53:50 -0500239 if (acpi_video_device_lcd_get_level_current(vd, &cur_level, 0))
Zhang Ruic8890f92009-03-18 16:27:08 +0800240 return -EINVAL;
Matthew Garrett38531e62007-12-26 02:03:26 +0000241 for (i = 2; i < vd->brightness->count; i++) {
242 if (vd->brightness->levels[i] == cur_level)
243 /* The first two entries are special - see page 575
244 of the ACPI spec 3.0 */
245 return i-2;
246 }
247 return 0;
Yu Luming2f3d0002006-11-11 02:40:34 +0800248}
249
250static int acpi_video_set_brightness(struct backlight_device *bd)
251{
Zhang Rui24450c72009-03-18 16:27:10 +0800252 int request_level = bd->props.brightness + 2;
Yu Luming2f3d0002006-11-11 02:40:34 +0800253 struct acpi_video_device *vd =
Richard Purdie655bfd72007-07-09 12:17:24 +0100254 (struct acpi_video_device *)bl_get_data(bd);
Zhang Rui24450c72009-03-18 16:27:10 +0800255
256 return acpi_video_device_lcd_set_level(vd,
257 vd->brightness->levels[request_level]);
Yu Luming2f3d0002006-11-11 02:40:34 +0800258}
259
Lionel Debrouxacc24722010-11-16 14:14:02 +0100260static const struct backlight_ops acpi_backlight_ops = {
Richard Purdie599a52d2007-02-10 23:07:48 +0000261 .get_brightness = acpi_video_get_brightness,
262 .update_status = acpi_video_set_brightness,
263};
264
Zhang Rui702ed512008-01-17 15:51:22 +0800265/* thermal cooling device callbacks */
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400266static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000267 long *state)
Zhang Rui702ed512008-01-17 15:51:22 +0800268{
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400269 struct acpi_device *device = cooling_dev->devdata;
Zhang Rui702ed512008-01-17 15:51:22 +0800270 struct acpi_video_device *video = acpi_driver_data(device);
271
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000272 *state = video->brightness->count - 3;
273 return 0;
Zhang Rui702ed512008-01-17 15:51:22 +0800274}
275
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400276static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000277 long *state)
Zhang Rui702ed512008-01-17 15:51:22 +0800278{
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400279 struct acpi_device *device = cooling_dev->devdata;
Zhang Rui702ed512008-01-17 15:51:22 +0800280 struct acpi_video_device *video = acpi_driver_data(device);
Matthew Wilcox27663c52008-10-10 02:22:59 -0400281 unsigned long long level;
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000282 int offset;
Zhang Rui702ed512008-01-17 15:51:22 +0800283
Matthew Garrett70287db2010-02-16 16:53:50 -0500284 if (acpi_video_device_lcd_get_level_current(video, &level, 0))
Zhang Ruic8890f92009-03-18 16:27:08 +0800285 return -EINVAL;
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000286 for (offset = 2; offset < video->brightness->count; offset++)
287 if (level == video->brightness->levels[offset]) {
288 *state = video->brightness->count - offset - 1;
289 return 0;
290 }
Zhang Rui702ed512008-01-17 15:51:22 +0800291
292 return -EINVAL;
293}
294
295static int
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400296video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state)
Zhang Rui702ed512008-01-17 15:51:22 +0800297{
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400298 struct acpi_device *device = cooling_dev->devdata;
Zhang Rui702ed512008-01-17 15:51:22 +0800299 struct acpi_video_device *video = acpi_driver_data(device);
300 int level;
301
302 if ( state >= video->brightness->count - 2)
303 return -EINVAL;
304
305 state = video->brightness->count - state;
306 level = video->brightness->levels[state -1];
307 return acpi_video_device_lcd_set_level(video, level);
308}
309
Vasiliy Kulikov9c8b04b2011-06-25 21:07:52 +0400310static const struct thermal_cooling_device_ops video_cooling_ops = {
Zhang Rui702ed512008-01-17 15:51:22 +0800311 .get_max_state = video_get_max_state,
312 .get_cur_state = video_get_cur_state,
313 .set_cur_state = video_set_cur_state,
314};
315
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316/* --------------------------------------------------------------------------
317 Video Management
318 -------------------------------------------------------------------------- */
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320static int
Len Brown4be44fc2005-08-05 00:44:28 -0400321acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
322 union acpi_object **levels)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323{
Len Brown4be44fc2005-08-05 00:44:28 -0400324 int status;
325 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
326 union acpi_object *obj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329 *levels = NULL;
330
Patrick Mochel90130262006-05-19 16:54:48 -0400331 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 if (!ACPI_SUCCESS(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400333 return status;
Len Brown4be44fc2005-08-05 00:44:28 -0400334 obj = (union acpi_object *)buffer.pointer;
Adrian Bunk6665bda2006-03-11 10:12:00 -0500335 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
Len Brown64684632006-06-26 23:41:38 -0400336 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 status = -EFAULT;
338 goto err;
339 }
340
341 *levels = obj;
342
Patrick Mocheld550d982006-06-27 00:41:40 -0400343 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Len Brown4be44fc2005-08-05 00:44:28 -0400345 err:
Jesper Juhl6044ec82005-11-07 01:01:32 -0800346 kfree(buffer.pointer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Patrick Mocheld550d982006-06-27 00:41:40 -0400348 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349}
350
351static int
Len Brown4be44fc2005-08-05 00:44:28 -0400352acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353{
Zhang Rui24450c72009-03-18 16:27:10 +0800354 int status;
Len Brown4be44fc2005-08-05 00:44:28 -0400355 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
356 struct acpi_object_list args = { 1, &arg0 };
Zhang Rui9e6dada2008-12-31 10:58:48 +0800357 int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 arg0.integer.value = level;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
Zhang Rui24450c72009-03-18 16:27:10 +0800361 status = acpi_evaluate_object(device->dev->handle, "_BCM",
362 &args, NULL);
363 if (ACPI_FAILURE(status)) {
364 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
365 return -EIO;
366 }
367
Alexey Starikovskiy4500ca82007-09-03 16:29:58 +0400368 device->brightness->curr = level;
Zhang Rui9e6dada2008-12-31 10:58:48 +0800369 for (state = 2; state < device->brightness->count; state++)
Zhang Rui24450c72009-03-18 16:27:10 +0800370 if (level == device->brightness->levels[state]) {
Zhang Rui1a7c6182009-03-18 16:27:16 +0800371 if (device->backlight)
372 device->backlight->props.brightness = state - 2;
Zhang Rui24450c72009-03-18 16:27:10 +0800373 return 0;
374 }
Zhang Rui9e6dada2008-12-31 10:58:48 +0800375
Zhang Rui24450c72009-03-18 16:27:10 +0800376 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
377 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378}
379
Zhang Rui45cb50e2009-04-24 12:13:18 -0400380/*
381 * For some buggy _BQC methods, we need to add a constant value to
382 * the _BQC return value to get the actual current brightness level
383 */
384
385static int bqc_offset_aml_bug_workaround;
386static int __init video_set_bqc_offset(const struct dmi_system_id *d)
387{
388 bqc_offset_aml_bug_workaround = 9;
389 return 0;
390}
391
392static struct dmi_system_id video_dmi_table[] __initdata = {
393 /*
394 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
395 */
396 {
397 .callback = video_set_bqc_offset,
398 .ident = "Acer Aspire 5720",
399 .matches = {
400 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
401 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
402 },
403 },
Len Brown5afc4ab2009-05-07 21:11:56 -0400404 {
405 .callback = video_set_bqc_offset,
406 .ident = "Acer Aspire 5710Z",
407 .matches = {
408 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
409 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
410 },
411 },
Zhang Rui34ac2722009-05-26 23:35:34 -0400412 {
413 .callback = video_set_bqc_offset,
414 .ident = "eMachines E510",
415 .matches = {
416 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
417 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
418 },
419 },
Zhang Rui93bcece2009-05-19 15:08:41 -0400420 {
421 .callback = video_set_bqc_offset,
422 .ident = "Acer Aspire 5315",
423 .matches = {
424 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
425 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
426 },
427 },
Zhang Rui152a4e62009-06-22 11:31:18 +0800428 {
429 .callback = video_set_bqc_offset,
430 .ident = "Acer Aspire 7720",
431 .matches = {
432 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
433 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
434 },
435 },
Zhang Rui45cb50e2009-04-24 12:13:18 -0400436 {}
437};
438
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439static int
Len Brown4be44fc2005-08-05 00:44:28 -0400440acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
Matthew Garrett70287db2010-02-16 16:53:50 -0500441 unsigned long long *level, int init)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442{
Zhang Ruic8890f92009-03-18 16:27:08 +0800443 acpi_status status = AE_OK;
Vladimir Serbinenko4e231fa2009-06-24 15:17:36 +0800444 int i;
Zhang Ruic8890f92009-03-18 16:27:08 +0800445
Zhang Ruic60d6382009-03-18 16:27:18 +0800446 if (device->cap._BQC || device->cap._BCQ) {
447 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
448
449 status = acpi_evaluate_integer(device->dev->handle, buf,
Zhang Ruic8890f92009-03-18 16:27:08 +0800450 NULL, level);
451 if (ACPI_SUCCESS(status)) {
Zhang Rui1a7c6182009-03-18 16:27:16 +0800452 if (device->brightness->flags._BQC_use_index) {
453 if (device->brightness->flags._BCL_reversed)
454 *level = device->brightness->count
455 - 3 - (*level);
456 *level = device->brightness->levels[*level + 2];
457
458 }
Zhang Rui45cb50e2009-04-24 12:13:18 -0400459 *level += bqc_offset_aml_bug_workaround;
Vladimir Serbinenko4e231fa2009-06-24 15:17:36 +0800460 for (i = 2; i < device->brightness->count; i++)
461 if (device->brightness->levels[i] == *level) {
462 device->brightness->curr = *level;
463 return 0;
464 }
Matthew Garrett70287db2010-02-16 16:53:50 -0500465 if (!init) {
466 /*
467 * BQC returned an invalid level.
468 * Stop using it.
469 */
470 ACPI_WARNING((AE_INFO,
471 "%s returned an invalid level",
472 buf));
473 device->cap._BQC = device->cap._BCQ = 0;
474 }
Zhang Ruic8890f92009-03-18 16:27:08 +0800475 } else {
476 /* Fixme:
477 * should we return an error or ignore this failure?
478 * dev->brightness->curr is a cached value which stores
479 * the correct current backlight level in most cases.
480 * ACPI video backlight still works w/ buggy _BQC.
481 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
482 */
Zhang Ruic60d6382009-03-18 16:27:18 +0800483 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
484 device->cap._BQC = device->cap._BCQ = 0;
Zhang Ruic8890f92009-03-18 16:27:08 +0800485 }
486 }
487
Alexey Starikovskiy4500ca82007-09-03 16:29:58 +0400488 *level = device->brightness->curr;
Zhang Ruic8890f92009-03-18 16:27:08 +0800489 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490}
491
492static int
Len Brown4be44fc2005-08-05 00:44:28 -0400493acpi_video_device_EDID(struct acpi_video_device *device,
494 union acpi_object **edid, ssize_t length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495{
Len Brown4be44fc2005-08-05 00:44:28 -0400496 int status;
497 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
498 union acpi_object *obj;
499 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
500 struct acpi_object_list args = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
503 *edid = NULL;
504
505 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400506 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 if (length == 128)
508 arg0.integer.value = 1;
509 else if (length == 256)
510 arg0.integer.value = 2;
511 else
Patrick Mocheld550d982006-06-27 00:41:40 -0400512 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Patrick Mochel90130262006-05-19 16:54:48 -0400514 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400516 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200518 obj = buffer.pointer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520 if (obj && obj->type == ACPI_TYPE_BUFFER)
521 *edid = obj;
522 else {
Len Brown64684632006-06-26 23:41:38 -0400523 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 status = -EFAULT;
525 kfree(obj);
526 }
527
Patrick Mocheld550d982006-06-27 00:41:40 -0400528 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529}
530
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531/* bus */
532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533/*
534 * Arg:
535 * video : video bus device pointer
536 * bios_flag :
537 * 0. The system BIOS should NOT automatically switch(toggle)
538 * the active display output.
539 * 1. The system BIOS should automatically switch (toggle) the
Julius Volz98fb8fe2007-02-20 16:38:40 +0100540 * active display output. No switch event.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 * 2. The _DGS value should be locked.
542 * 3. The system BIOS should not automatically switch (toggle) the
543 * active display output, but instead generate the display switch
544 * event notify code.
545 * lcd_flag :
546 * 0. The system BIOS should automatically control the brightness level
Julius Volz98fb8fe2007-02-20 16:38:40 +0100547 * of the LCD when the power changes from AC to DC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 * 1. The system BIOS should NOT automatically control the brightness
Julius Volz98fb8fe2007-02-20 16:38:40 +0100549 * level of the LCD when the power changes from AC to DC.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 * Return Value:
Igor Murzovea9f8852012-03-30 21:32:08 +0400551 * -EINVAL wrong arg.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 */
553
554static int
Len Brown4be44fc2005-08-05 00:44:28 -0400555acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
Igor Murzovea9f8852012-03-30 21:32:08 +0400557 acpi_status status;
Len Brown4be44fc2005-08-05 00:44:28 -0400558 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
559 struct acpi_object_list args = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Zhang Ruib0373842012-06-20 09:48:43 +0800561 if (!video->cap._DOS)
562 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
Igor Murzovea9f8852012-03-30 21:32:08 +0400564 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1)
565 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 arg0.integer.value = (lcd_flag << 2) | bios_flag;
567 video->dos_setting = arg0.integer.value;
Igor Murzovea9f8852012-03-30 21:32:08 +0400568 status = acpi_evaluate_object(video->device->handle, "_DOS",
569 &args, NULL);
570 if (ACPI_FAILURE(status))
571 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Igor Murzovea9f8852012-03-30 21:32:08 +0400573 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574}
575
576/*
Zhang Rui935e5f22008-12-11 16:24:52 -0500577 * Simple comparison function used to sort backlight levels.
578 */
579
580static int
581acpi_video_cmp_level(const void *a, const void *b)
582{
583 return *(int *)a - *(int *)b;
584}
585
586/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 * Arg:
588 * device : video output device (LCD, CRT, ..)
589 *
590 * Return Value:
Julia Jomantaite469778c2008-06-23 22:50:42 +0100591 * Maximum brightness level
592 *
593 * Allocate and initialize device->brightness.
594 */
595
596static int
597acpi_video_init_brightness(struct acpi_video_device *device)
598{
599 union acpi_object *obj = NULL;
Zhang Ruid32f6942009-03-18 16:27:12 +0800600 int i, max_level = 0, count = 0, level_ac_battery = 0;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800601 unsigned long long level, level_old;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100602 union acpi_object *o;
603 struct acpi_video_device_brightness *br = NULL;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800604 int result = -EINVAL;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100605
606 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
607 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
608 "LCD brightness level\n"));
609 goto out;
610 }
611
612 if (obj->package.count < 2)
613 goto out;
614
615 br = kzalloc(sizeof(*br), GFP_KERNEL);
616 if (!br) {
617 printk(KERN_ERR "can't allocate memory\n");
Zhang Rui1a7c6182009-03-18 16:27:16 +0800618 result = -ENOMEM;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100619 goto out;
620 }
621
Zhang Ruid32f6942009-03-18 16:27:12 +0800622 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
Julia Jomantaite469778c2008-06-23 22:50:42 +0100623 GFP_KERNEL);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800624 if (!br->levels) {
625 result = -ENOMEM;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100626 goto out_free;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800627 }
Julia Jomantaite469778c2008-06-23 22:50:42 +0100628
629 for (i = 0; i < obj->package.count; i++) {
630 o = (union acpi_object *)&obj->package.elements[i];
631 if (o->type != ACPI_TYPE_INTEGER) {
632 printk(KERN_ERR PREFIX "Invalid data\n");
633 continue;
634 }
635 br->levels[count] = (u32) o->integer.value;
636
637 if (br->levels[count] > max_level)
638 max_level = br->levels[count];
639 count++;
640 }
641
Zhang Ruid32f6942009-03-18 16:27:12 +0800642 /*
643 * some buggy BIOS don't export the levels
644 * when machine is on AC/Battery in _BCL package.
645 * In this case, the first two elements in _BCL packages
646 * are also supported brightness levels that OS should take care of.
647 */
Zhang Rui90af2cf2009-04-14 11:02:18 +0800648 for (i = 2; i < count; i++) {
649 if (br->levels[i] == br->levels[0])
Zhang Ruid32f6942009-03-18 16:27:12 +0800650 level_ac_battery++;
Zhang Rui90af2cf2009-04-14 11:02:18 +0800651 if (br->levels[i] == br->levels[1])
652 level_ac_battery++;
653 }
Zhang Rui935e5f22008-12-11 16:24:52 -0500654
Zhang Ruid32f6942009-03-18 16:27:12 +0800655 if (level_ac_battery < 2) {
656 level_ac_battery = 2 - level_ac_battery;
657 br->flags._BCL_no_ac_battery_levels = 1;
658 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
659 br->levels[i] = br->levels[i - level_ac_battery];
660 count += level_ac_battery;
661 } else if (level_ac_battery > 2)
662 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
663
Zhang Ruid80fb992009-03-18 16:27:14 +0800664 /* Check if the _BCL package is in a reversed order */
665 if (max_level == br->levels[2]) {
666 br->flags._BCL_reversed = 1;
667 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
668 acpi_video_cmp_level, NULL);
669 } else if (max_level != br->levels[count - 1])
670 ACPI_ERROR((AE_INFO,
671 "Found unordered _BCL package\n"));
Julia Jomantaite469778c2008-06-23 22:50:42 +0100672
673 br->count = count;
674 device->brightness = br;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800675
676 /* Check the input/output of _BQC/_BCL/_BCM */
677 if ((max_level < 100) && (max_level <= (count - 2)))
678 br->flags._BCL_use_index = 1;
679
680 /*
681 * _BCM is always consistent with _BCL,
682 * at least for all the laptops we have ever seen.
683 */
684 br->flags._BCM_use_index = br->flags._BCL_use_index;
685
686 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
Zhang Rui90c53ca2009-08-31 12:39:54 -0400687 br->curr = level = max_level;
Zhang Ruie047cca2009-04-09 14:24:35 +0800688
689 if (!device->cap._BQC)
690 goto set_level;
691
Matthew Garrett70287db2010-02-16 16:53:50 -0500692 result = acpi_video_device_lcd_get_level_current(device, &level_old, 1);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800693 if (result)
694 goto out_free_levels;
695
Zhang Ruie047cca2009-04-09 14:24:35 +0800696 /*
697 * Set the level to maximum and check if _BQC uses indexed value
698 */
699 result = acpi_video_device_lcd_set_level(device, max_level);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800700 if (result)
701 goto out_free_levels;
702
Matthew Garrett70287db2010-02-16 16:53:50 -0500703 result = acpi_video_device_lcd_get_level_current(device, &level, 0);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800704 if (result)
705 goto out_free_levels;
706
Zhang Ruie047cca2009-04-09 14:24:35 +0800707 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800708
Zhang Rui90c53ca2009-08-31 12:39:54 -0400709 if (!br->flags._BQC_use_index) {
710 /*
711 * Set the backlight to the initial state.
712 * On some buggy laptops, _BQC returns an uninitialized value
713 * when invoked for the first time, i.e. level_old is invalid.
714 * set the backlight to max_level in this case
715 */
Zhang Rui99fd1892010-12-06 15:04:27 +0800716 if (use_bios_initial_backlight) {
717 for (i = 2; i < br->count; i++)
718 if (level_old == br->levels[i])
719 level = level_old;
720 }
Zhang Ruie047cca2009-04-09 14:24:35 +0800721 goto set_level;
Zhang Rui90c53ca2009-08-31 12:39:54 -0400722 }
Zhang Ruie047cca2009-04-09 14:24:35 +0800723
724 if (br->flags._BCL_reversed)
725 level_old = (br->count - 1) - level_old;
Zhang Rui90c53ca2009-08-31 12:39:54 -0400726 level = br->levels[level_old];
Zhang Ruie047cca2009-04-09 14:24:35 +0800727
728set_level:
Zhang Rui90c53ca2009-08-31 12:39:54 -0400729 result = acpi_video_device_lcd_set_level(device, level);
Zhang Ruie047cca2009-04-09 14:24:35 +0800730 if (result)
731 goto out_free_levels;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800732
Zhang Ruid32f6942009-03-18 16:27:12 +0800733 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
734 "found %d brightness levels\n", count - 2));
Julia Jomantaite469778c2008-06-23 22:50:42 +0100735 kfree(obj);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800736 return result;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100737
738out_free_levels:
739 kfree(br->levels);
740out_free:
741 kfree(br);
742out:
743 device->brightness = NULL;
744 kfree(obj);
Zhang Rui1a7c6182009-03-18 16:27:16 +0800745 return result;
Julia Jomantaite469778c2008-06-23 22:50:42 +0100746}
747
748/*
749 * Arg:
750 * device : video output device (LCD, CRT, ..)
751 *
752 * Return Value:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 * None
754 *
Julius Volz98fb8fe2007-02-20 16:38:40 +0100755 * Find out all required AML methods defined under the output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 * device.
757 */
758
Len Brown4be44fc2005-08-05 00:44:28 -0400759static void acpi_video_device_find_cap(struct acpi_video_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 acpi_handle h_dummy1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
Patrick Mochel90130262006-05-19 16:54:48 -0400763 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 device->cap._ADR = 1;
765 }
Patrick Mochel90130262006-05-19 16:54:48 -0400766 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
Len Brown4be44fc2005-08-05 00:44:28 -0400767 device->cap._BCL = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 }
Patrick Mochel90130262006-05-19 16:54:48 -0400769 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
Len Brown4be44fc2005-08-05 00:44:28 -0400770 device->cap._BCM = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 }
Yu Luming2f3d0002006-11-11 02:40:34 +0800772 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
773 device->cap._BQC = 1;
Zhang Ruic60d6382009-03-18 16:27:18 +0800774 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
775 &h_dummy1))) {
776 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
777 device->cap._BCQ = 1;
778 }
779
Patrick Mochel90130262006-05-19 16:54:48 -0400780 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
Len Brown4be44fc2005-08-05 00:44:28 -0400781 device->cap._DDC = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
Zhang Rui1a7c6182009-03-18 16:27:16 +0800784 if (acpi_video_backlight_support()) {
Matthew Garretta19a6ee2010-02-17 16:39:44 -0500785 struct backlight_properties props;
Matthew Garrett9661e922011-03-22 16:30:25 -0700786 struct pci_dev *pdev;
787 acpi_handle acpi_parent;
788 struct device *parent = NULL;
Zhang Rui702ed512008-01-17 15:51:22 +0800789 int result;
Yu Luming2f3d0002006-11-11 02:40:34 +0800790 static int count = 0;
791 char *name;
Zhang Rui1a7c6182009-03-18 16:27:16 +0800792
793 result = acpi_video_init_brightness(device);
794 if (result)
795 return;
Julia Lawallaeb834d2010-04-27 14:06:04 -0700796 name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
Yu Luming2f3d0002006-11-11 02:40:34 +0800797 if (!name)
798 return;
Julia Lawallaeb834d2010-04-27 14:06:04 -0700799 count++;
Yu Luming2f3d0002006-11-11 02:40:34 +0800800
Matthew Garrett9661e922011-03-22 16:30:25 -0700801 acpi_get_parent(device->dev->handle, &acpi_parent);
802
803 pdev = acpi_get_pci_dev(acpi_parent);
804 if (pdev) {
805 parent = &pdev->dev;
806 pci_dev_put(pdev);
807 }
808
Matthew Garretta19a6ee2010-02-17 16:39:44 -0500809 memset(&props, 0, sizeof(struct backlight_properties));
Matthew Garrettbb7ca742011-03-22 16:30:21 -0700810 props.type = BACKLIGHT_FIRMWARE;
Matthew Garretta19a6ee2010-02-17 16:39:44 -0500811 props.max_brightness = device->brightness->count - 3;
Matthew Garrett9661e922011-03-22 16:30:25 -0700812 device->backlight = backlight_device_register(name,
813 parent,
814 device,
Matthew Garretta19a6ee2010-02-17 16:39:44 -0500815 &acpi_backlight_ops,
816 &props);
Yu Luming2f3d0002006-11-11 02:40:34 +0800817 kfree(name);
Zhang Ruie01ce792009-07-29 08:53:29 +0800818 if (IS_ERR(device->backlight))
819 return;
Zhang Rui702ed512008-01-17 15:51:22 +0800820
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +0200821 /*
822 * Save current brightness level in case we have to restore it
823 * before acpi_video_device_lcd_set_level() is called next time.
824 */
825 device->backlight->props.brightness =
826 acpi_video_get_brightness(device->backlight);
Zhang Rui702ed512008-01-17 15:51:22 +0800827
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400828 device->cooling_dev = thermal_cooling_device_register("LCD",
Zhang Rui702ed512008-01-17 15:51:22 +0800829 device->dev, &video_cooling_ops);
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400830 if (IS_ERR(device->cooling_dev)) {
Dmitry Torokhov4b4fe3b2009-08-08 00:26:25 -0700831 /*
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400832 * Set cooling_dev to NULL so we don't crash trying to
Dmitry Torokhov4b4fe3b2009-08-08 00:26:25 -0700833 * free it.
834 * Also, why the hell we are returning early and
835 * not attempt to register video output if cooling
836 * device registration failed?
837 * -- dtor
838 */
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400839 device->cooling_dev = NULL;
Thomas Sujith43ff39f2008-02-15 18:29:18 -0500840 return;
Dmitry Torokhov4b4fe3b2009-08-08 00:26:25 -0700841 }
Thomas Sujith43ff39f2008-02-15 18:29:18 -0500842
Greg Kroah-Hartmanfc3a8822008-05-02 06:02:41 +0200843 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400844 device->cooling_dev->id);
Julia Lawall90300622008-04-11 10:09:24 +0800845 result = sysfs_create_link(&device->dev->dev.kobj,
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400846 &device->cooling_dev->device.kobj,
Julia Lawall90300622008-04-11 10:09:24 +0800847 "thermal_cooling");
848 if (result)
849 printk(KERN_ERR PREFIX "Create sysfs link\n");
Dmitry Torokhov4a703a82009-08-29 23:03:16 -0400850 result = sysfs_create_link(&device->cooling_dev->device.kobj,
Julia Lawall90300622008-04-11 10:09:24 +0800851 &device->dev->dev.kobj, "device");
852 if (result)
853 printk(KERN_ERR PREFIX "Create sysfs link\n");
854
Yu Luming2f3d0002006-11-11 02:40:34 +0800855 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856}
857
858/*
859 * Arg:
860 * device : video output device (VGA)
861 *
862 * Return Value:
863 * None
864 *
Julius Volz98fb8fe2007-02-20 16:38:40 +0100865 * Find out all required AML methods defined under the video bus device.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 */
867
Len Brown4be44fc2005-08-05 00:44:28 -0400868static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869{
Len Brown4be44fc2005-08-05 00:44:28 -0400870 acpi_handle h_dummy1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Patrick Mochel90130262006-05-19 16:54:48 -0400872 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 video->cap._DOS = 1;
874 }
Patrick Mochel90130262006-05-19 16:54:48 -0400875 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 video->cap._DOD = 1;
877 }
Patrick Mochel90130262006-05-19 16:54:48 -0400878 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 video->cap._ROM = 1;
880 }
Patrick Mochel90130262006-05-19 16:54:48 -0400881 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 video->cap._GPD = 1;
883 }
Patrick Mochel90130262006-05-19 16:54:48 -0400884 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 video->cap._SPD = 1;
886 }
Patrick Mochel90130262006-05-19 16:54:48 -0400887 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 video->cap._VPO = 1;
889 }
890}
891
892/*
893 * Check whether the video bus device has required AML method to
894 * support the desired features
895 */
896
Len Brown4be44fc2005-08-05 00:44:28 -0400897static int acpi_video_bus_check(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898{
Len Brown4be44fc2005-08-05 00:44:28 -0400899 acpi_status status = -ENOENT;
Alexander Chiang1e4cffe2009-06-10 19:56:00 +0000900 struct pci_dev *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901
902 if (!video)
Patrick Mocheld550d982006-06-27 00:41:40 -0400903 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904
Alexander Chiang1e4cffe2009-06-10 19:56:00 +0000905 dev = acpi_get_pci_dev(video->device->handle);
Thomas Renninger22c13f92008-08-01 17:37:54 +0200906 if (!dev)
907 return -ENODEV;
Alexander Chiang1e4cffe2009-06-10 19:56:00 +0000908 pci_dev_put(dev);
Thomas Renninger22c13f92008-08-01 17:37:54 +0200909
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 /* Since there is no HID, CID and so on for VGA driver, we have
911 * to check well known required nodes.
912 */
913
Julius Volz98fb8fe2007-02-20 16:38:40 +0100914 /* Does this device support video switching? */
Stefan Bader3a1151e2009-08-21 11:03:05 +0200915 if (video->cap._DOS || video->cap._DOD) {
916 if (!video->cap._DOS) {
917 printk(KERN_WARNING FW_BUG
918 "ACPI(%s) defines _DOD but not _DOS\n",
919 acpi_device_bid(video->device));
920 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 video->flags.multihead = 1;
922 status = 0;
923 }
924
Julius Volz98fb8fe2007-02-20 16:38:40 +0100925 /* Does this device support retrieving a video ROM? */
Len Brown4be44fc2005-08-05 00:44:28 -0400926 if (video->cap._ROM) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 video->flags.rom = 1;
928 status = 0;
929 }
930
Julius Volz98fb8fe2007-02-20 16:38:40 +0100931 /* Does this device support configuring which video device to POST? */
Len Brown4be44fc2005-08-05 00:44:28 -0400932 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 video->flags.post = 1;
934 status = 0;
935 }
936
Patrick Mocheld550d982006-06-27 00:41:40 -0400937 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938}
939
940/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 Driver Interface
942 -------------------------------------------------------------------------- */
943
944/* device interface */
Rui Zhang82cae992007-01-03 23:40:53 -0500945static struct acpi_video_device_attrib*
946acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
947{
Dmitry Torokhov78eed022007-11-05 11:43:33 -0500948 struct acpi_video_enumerated_device *ids;
949 int i;
Rui Zhang82cae992007-01-03 23:40:53 -0500950
Dmitry Torokhov78eed022007-11-05 11:43:33 -0500951 for (i = 0; i < video->attached_count; i++) {
952 ids = &video->attached_array[i];
953 if ((ids->value.int_val & 0xffff) == device_id)
954 return &ids->value.attrib;
955 }
956
Rui Zhang82cae992007-01-03 23:40:53 -0500957 return NULL;
958}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
960static int
Matthew Garrette92a7162010-01-12 14:17:03 -0500961acpi_video_get_device_type(struct acpi_video_bus *video,
962 unsigned long device_id)
963{
964 struct acpi_video_enumerated_device *ids;
965 int i;
966
967 for (i = 0; i < video->attached_count; i++) {
968 ids = &video->attached_array[i];
969 if ((ids->value.int_val & 0xffff) == device_id)
970 return ids->value.int_val;
971 }
972
973 return 0;
974}
975
976static int
Len Brown4be44fc2005-08-05 00:44:28 -0400977acpi_video_bus_get_one_device(struct acpi_device *device,
978 struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979{
Matthew Wilcox27663c52008-10-10 02:22:59 -0400980 unsigned long long device_id;
Matthew Garrette92a7162010-01-12 14:17:03 -0500981 int status, device_type;
Len Brown4be44fc2005-08-05 00:44:28 -0400982 struct acpi_video_device *data;
Rui Zhang82cae992007-01-03 23:40:53 -0500983 struct acpi_video_device_attrib* attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
985 if (!device || !video)
Patrick Mocheld550d982006-06-27 00:41:40 -0400986 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987
Len Brown4be44fc2005-08-05 00:44:28 -0400988 status =
989 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 if (ACPI_SUCCESS(status)) {
991
Burman Yan36bcbec2006-12-19 12:56:11 -0800992 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 if (!data)
Patrick Mocheld550d982006-06-27 00:41:40 -0400994 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
997 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700998 device->driver_data = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999
1000 data->device_id = device_id;
1001 data->video = video;
1002 data->dev = device;
1003
Rui Zhang82cae992007-01-03 23:40:53 -05001004 attribute = acpi_video_get_device_attr(video, device_id);
1005
1006 if((attribute != NULL) && attribute->device_id_scheme) {
1007 switch (attribute->display_type) {
1008 case ACPI_VIDEO_DISPLAY_CRT:
1009 data->flags.crt = 1;
1010 break;
1011 case ACPI_VIDEO_DISPLAY_TV:
1012 data->flags.tvout = 1;
1013 break;
1014 case ACPI_VIDEO_DISPLAY_DVI:
1015 data->flags.dvi = 1;
1016 break;
1017 case ACPI_VIDEO_DISPLAY_LCD:
1018 data->flags.lcd = 1;
1019 break;
1020 default:
1021 data->flags.unknown = 1;
1022 break;
1023 }
1024 if(attribute->bios_can_detect)
1025 data->flags.bios = 1;
Matthew Garrette92a7162010-01-12 14:17:03 -05001026 } else {
1027 /* Check for legacy IDs */
1028 device_type = acpi_video_get_device_type(video,
1029 device_id);
1030 /* Ignore bits 16 and 18-20 */
1031 switch (device_type & 0xffe2ffff) {
1032 case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR:
1033 data->flags.crt = 1;
1034 break;
1035 case ACPI_VIDEO_DISPLAY_LEGACY_PANEL:
1036 data->flags.lcd = 1;
1037 break;
1038 case ACPI_VIDEO_DISPLAY_LEGACY_TV:
1039 data->flags.tvout = 1;
1040 break;
1041 default:
1042 data->flags.unknown = 1;
1043 }
1044 }
Len Brown4be44fc2005-08-05 00:44:28 -04001045
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 acpi_video_device_bind(video, data);
1047 acpi_video_device_find_cap(data);
1048
Patrick Mochel90130262006-05-19 16:54:48 -04001049 status = acpi_install_notify_handler(device->handle,
Len Brown4be44fc2005-08-05 00:44:28 -04001050 ACPI_DEVICE_NOTIFY,
1051 acpi_video_device_notify,
1052 data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 if (ACPI_FAILURE(status)) {
Lin Ming55ac9a02008-09-28 14:51:56 +08001054 printk(KERN_ERR PREFIX
1055 "Error installing notify handler\n");
Yu, Luming973bf492006-04-27 05:25:00 -04001056 if(data->brightness)
1057 kfree(data->brightness->levels);
1058 kfree(data->brightness);
1059 kfree(data);
1060 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 }
1062
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001063 mutex_lock(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 list_add_tail(&data->entry, &video->video_device_list);
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001065 mutex_unlock(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066
Patrick Mocheld550d982006-06-27 00:41:40 -04001067 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 }
1069
Patrick Mocheld550d982006-06-27 00:41:40 -04001070 return -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071}
1072
1073/*
1074 * Arg:
1075 * video : video bus device
1076 *
1077 * Return:
1078 * none
1079 *
1080 * Enumerate the video device list of the video bus,
1081 * bind the ids with the corresponding video devices
1082 * under the video bus.
Len Brown4be44fc2005-08-05 00:44:28 -04001083 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
Len Brown4be44fc2005-08-05 00:44:28 -04001085static void acpi_video_device_rebind(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086{
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001087 struct acpi_video_device *dev;
1088
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001089 mutex_lock(&video->device_list_lock);
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001090
1091 list_for_each_entry(dev, &video->video_device_list, entry)
Len Brown4be44fc2005-08-05 00:44:28 -04001092 acpi_video_device_bind(video, dev);
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001093
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001094 mutex_unlock(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095}
1096
1097/*
1098 * Arg:
1099 * video : video bus device
1100 * device : video output device under the video
1101 * bus
1102 *
1103 * Return:
1104 * none
1105 *
1106 * Bind the ids with the corresponding video devices
1107 * under the video bus.
Len Brown4be44fc2005-08-05 00:44:28 -04001108 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109
1110static void
Len Brown4be44fc2005-08-05 00:44:28 -04001111acpi_video_device_bind(struct acpi_video_bus *video,
1112 struct acpi_video_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113{
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001114 struct acpi_video_enumerated_device *ids;
Len Brown4be44fc2005-08-05 00:44:28 -04001115 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001117 for (i = 0; i < video->attached_count; i++) {
1118 ids = &video->attached_array[i];
1119 if (device->device_id == (ids->value.int_val & 0xffff)) {
1120 ids->bind_info = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1122 }
1123 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124}
1125
1126/*
1127 * Arg:
1128 * video : video bus device
1129 *
1130 * Return:
1131 * < 0 : error
1132 *
1133 * Call _DOD to enumerate all devices attached to display adapter
1134 *
Len Brown4be44fc2005-08-05 00:44:28 -04001135 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
1137static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1138{
Len Brown4be44fc2005-08-05 00:44:28 -04001139 int status;
1140 int count;
1141 int i;
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001142 struct acpi_video_enumerated_device *active_list;
Len Brown4be44fc2005-08-05 00:44:28 -04001143 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1144 union acpi_object *dod = NULL;
1145 union acpi_object *obj;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146
Patrick Mochel90130262006-05-19 16:54:48 -04001147 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 if (!ACPI_SUCCESS(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -04001149 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
Patrick Mocheld550d982006-06-27 00:41:40 -04001150 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 }
1152
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001153 dod = buffer.pointer;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -04001155 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 status = -EFAULT;
1157 goto out;
1158 }
1159
1160 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001161 dod->package.count));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001163 active_list = kcalloc(1 + dod->package.count,
1164 sizeof(struct acpi_video_enumerated_device),
1165 GFP_KERNEL);
1166 if (!active_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 status = -ENOMEM;
1168 goto out;
1169 }
1170
1171 count = 0;
1172 for (i = 0; i < dod->package.count; i++) {
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001173 obj = &dod->package.elements[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
1175 if (obj->type != ACPI_TYPE_INTEGER) {
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001176 printk(KERN_ERR PREFIX
1177 "Invalid _DOD data in element %d\n", i);
1178 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 }
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001180
1181 active_list[count].value.int_val = obj->integer.value;
1182 active_list[count].bind_info = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -04001183 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1184 (int)obj->integer.value));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 count++;
1186 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187
Jesper Juhl6044ec82005-11-07 01:01:32 -08001188 kfree(video->attached_array);
Len Brown4be44fc2005-08-05 00:44:28 -04001189
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001190 video->attached_array = active_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 video->attached_count = count;
Dmitry Torokhov78eed022007-11-05 11:43:33 -05001192
1193 out:
Len Brown02438d82006-06-30 03:19:10 -04001194 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -04001195 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196}
1197
Len Brown4be44fc2005-08-05 00:44:28 -04001198static int
1199acpi_video_get_next_level(struct acpi_video_device *device,
1200 u32 level_current, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201{
Alexey Starikovskiy63f0edf2007-09-03 16:30:08 +04001202 int min, max, min_above, max_below, i, l, delta = 255;
Thomas Tuttlef4715182006-12-19 12:56:14 -08001203 max = max_below = 0;
1204 min = min_above = 255;
Alexey Starikovskiy63f0edf2007-09-03 16:30:08 +04001205 /* Find closest level to level_current */
Zhao Yakui0a3db1c2009-02-02 11:33:41 +08001206 for (i = 2; i < device->brightness->count; i++) {
Alexey Starikovskiy63f0edf2007-09-03 16:30:08 +04001207 l = device->brightness->levels[i];
1208 if (abs(l - level_current) < abs(delta)) {
1209 delta = l - level_current;
1210 if (!delta)
1211 break;
1212 }
1213 }
1214 /* Ajust level_current to closest available level */
1215 level_current += delta;
Zhao Yakui0a3db1c2009-02-02 11:33:41 +08001216 for (i = 2; i < device->brightness->count; i++) {
Thomas Tuttlef4715182006-12-19 12:56:14 -08001217 l = device->brightness->levels[i];
1218 if (l < min)
1219 min = l;
1220 if (l > max)
1221 max = l;
1222 if (l < min_above && l > level_current)
1223 min_above = l;
1224 if (l > max_below && l < level_current)
1225 max_below = l;
1226 }
1227
1228 switch (event) {
1229 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1230 return (level_current < max) ? min_above : min;
1231 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1232 return (level_current < max) ? min_above : max;
1233 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1234 return (level_current > min) ? max_below : min;
1235 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1236 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1237 return 0;
1238 default:
1239 return level_current;
1240 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241}
1242
Zhang Ruic8890f92009-03-18 16:27:08 +08001243static int
Len Brown4be44fc2005-08-05 00:44:28 -04001244acpi_video_switch_brightness(struct acpi_video_device *device, int event)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245{
Matthew Wilcox27663c52008-10-10 02:22:59 -04001246 unsigned long long level_current, level_next;
Zhang Ruic8890f92009-03-18 16:27:08 +08001247 int result = -EINVAL;
1248
Zhang Rui28c32e92009-07-13 10:33:24 +08001249 /* no warning message if acpi_backlight=vendor is used */
1250 if (!acpi_video_backlight_support())
1251 return 0;
1252
Julia Jomantaite469778c2008-06-23 22:50:42 +01001253 if (!device->brightness)
Zhang Ruic8890f92009-03-18 16:27:08 +08001254 goto out;
1255
1256 result = acpi_video_device_lcd_get_level_current(device,
Matthew Garrett70287db2010-02-16 16:53:50 -05001257 &level_current, 0);
Zhang Ruic8890f92009-03-18 16:27:08 +08001258 if (result)
1259 goto out;
1260
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 level_next = acpi_video_get_next_level(device, level_current, event);
Zhang Ruic8890f92009-03-18 16:27:08 +08001262
Zhang Rui24450c72009-03-18 16:27:10 +08001263 result = acpi_video_device_lcd_set_level(device, level_next);
Zhang Ruic8890f92009-03-18 16:27:08 +08001264
Matthew Garrett36342742009-07-14 17:06:03 +01001265 if (!result)
1266 backlight_force_update(device->backlight,
1267 BACKLIGHT_UPDATE_HOTKEY);
1268
Zhang Ruic8890f92009-03-18 16:27:08 +08001269out:
1270 if (result)
1271 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1272
1273 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274}
1275
Matthew Garrette92a7162010-01-12 14:17:03 -05001276int acpi_video_get_edid(struct acpi_device *device, int type, int device_id,
1277 void **edid)
1278{
1279 struct acpi_video_bus *video;
1280 struct acpi_video_device *video_device;
1281 union acpi_object *buffer = NULL;
1282 acpi_status status;
1283 int i, length;
1284
1285 if (!device || !acpi_driver_data(device))
1286 return -EINVAL;
1287
1288 video = acpi_driver_data(device);
1289
1290 for (i = 0; i < video->attached_count; i++) {
1291 video_device = video->attached_array[i].bind_info;
1292 length = 256;
1293
1294 if (!video_device)
1295 continue;
1296
Zhang Rui82069552010-12-06 15:04:24 +08001297 if (!video_device->cap._DDC)
1298 continue;
1299
Matthew Garrette92a7162010-01-12 14:17:03 -05001300 if (type) {
1301 switch (type) {
1302 case ACPI_VIDEO_DISPLAY_CRT:
1303 if (!video_device->flags.crt)
1304 continue;
1305 break;
1306 case ACPI_VIDEO_DISPLAY_TV:
1307 if (!video_device->flags.tvout)
1308 continue;
1309 break;
1310 case ACPI_VIDEO_DISPLAY_DVI:
1311 if (!video_device->flags.dvi)
1312 continue;
1313 break;
1314 case ACPI_VIDEO_DISPLAY_LCD:
1315 if (!video_device->flags.lcd)
1316 continue;
1317 break;
1318 }
1319 } else if (video_device->device_id != device_id) {
1320 continue;
1321 }
1322
1323 status = acpi_video_device_EDID(video_device, &buffer, length);
1324
1325 if (ACPI_FAILURE(status) || !buffer ||
1326 buffer->type != ACPI_TYPE_BUFFER) {
1327 length = 128;
1328 status = acpi_video_device_EDID(video_device, &buffer,
1329 length);
1330 if (ACPI_FAILURE(status) || !buffer ||
1331 buffer->type != ACPI_TYPE_BUFFER) {
1332 continue;
1333 }
1334 }
1335
1336 *edid = buffer->buffer.pointer;
1337 return length;
1338 }
1339
1340 return -ENODEV;
1341}
1342EXPORT_SYMBOL(acpi_video_get_edid);
1343
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344static int
Len Brown4be44fc2005-08-05 00:44:28 -04001345acpi_video_bus_get_devices(struct acpi_video_bus *video,
1346 struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347{
Igor Murzovea9f8852012-03-30 21:32:08 +04001348 int status;
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001349 struct acpi_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350
Igor Murzovea9f8852012-03-30 21:32:08 +04001351 status = acpi_video_device_enumerate(video);
1352 if (status)
1353 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001355 list_for_each_entry(dev, &device->children, node) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356
1357 status = acpi_video_bus_get_one_device(dev, video);
Igor Murzovea9f8852012-03-30 21:32:08 +04001358 if (status) {
Lin Ming55ac9a02008-09-28 14:51:56 +08001359 printk(KERN_WARNING PREFIX
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001360 "Can't attach device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 continue;
1362 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 }
Patrick Mocheld550d982006-06-27 00:41:40 -04001364 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365}
1366
Len Brown4be44fc2005-08-05 00:44:28 -04001367static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368{
Karol Kozimor031ec772005-07-30 04:18:00 -04001369 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
1371 if (!device || !device->video)
Patrick Mocheld550d982006-06-27 00:41:40 -04001372 return -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373
Patrick Mochel90130262006-05-19 16:54:48 -04001374 status = acpi_remove_notify_handler(device->dev->handle,
Len Brown4be44fc2005-08-05 00:44:28 -04001375 ACPI_DEVICE_NOTIFY,
1376 acpi_video_device_notify);
Andi Kleencfa806f2010-07-20 15:18:36 -07001377 if (ACPI_FAILURE(status)) {
1378 printk(KERN_WARNING PREFIX
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001379 "Can't remove video notify handler\n");
Andi Kleencfa806f2010-07-20 15:18:36 -07001380 }
Keith Packarde29b3ee2009-08-06 15:57:54 -07001381 if (device->backlight) {
Keith Packarde29b3ee2009-08-06 15:57:54 -07001382 backlight_device_unregister(device->backlight);
1383 device->backlight = NULL;
1384 }
Dmitry Torokhov4a703a82009-08-29 23:03:16 -04001385 if (device->cooling_dev) {
Zhang Rui702ed512008-01-17 15:51:22 +08001386 sysfs_remove_link(&device->dev->dev.kobj,
1387 "thermal_cooling");
Dmitry Torokhov4a703a82009-08-29 23:03:16 -04001388 sysfs_remove_link(&device->cooling_dev->device.kobj,
Zhang Rui702ed512008-01-17 15:51:22 +08001389 "device");
Dmitry Torokhov4a703a82009-08-29 23:03:16 -04001390 thermal_cooling_device_unregister(device->cooling_dev);
1391 device->cooling_dev = NULL;
Zhang Rui702ed512008-01-17 15:51:22 +08001392 }
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001393
Patrick Mocheld550d982006-06-27 00:41:40 -04001394 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395}
1396
Len Brown4be44fc2005-08-05 00:44:28 -04001397static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398{
Len Brown4be44fc2005-08-05 00:44:28 -04001399 int status;
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001400 struct acpi_video_device *dev, *next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001402 mutex_lock(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001404 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001406 status = acpi_video_bus_put_one_device(dev);
Len Brown4be44fc2005-08-05 00:44:28 -04001407 if (ACPI_FAILURE(status))
1408 printk(KERN_WARNING PREFIX
1409 "hhuuhhuu bug in acpi video driver.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001411 if (dev->brightness) {
1412 kfree(dev->brightness->levels);
1413 kfree(dev->brightness);
1414 }
1415 list_del(&dev->entry);
1416 kfree(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 }
1418
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001419 mutex_unlock(&video->device_list_lock);
Dmitry Torokhovff102ea2007-11-05 11:43:31 -05001420
Patrick Mocheld550d982006-06-27 00:41:40 -04001421 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422}
1423
1424/* acpi_video interface */
1425
Len Brown4be44fc2005-08-05 00:44:28 -04001426static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427{
Zhang Ruia21101c2007-09-14 11:46:22 +08001428 return acpi_video_bus_DOS(video, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429}
1430
Len Brown4be44fc2005-08-05 00:44:28 -04001431static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432{
1433 return acpi_video_bus_DOS(video, 0, 1);
1434}
1435
Bjorn Helgaas70155582009-04-07 15:37:11 +00001436static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437{
Bjorn Helgaas70155582009-04-07 15:37:11 +00001438 struct acpi_video_bus *video = acpi_driver_data(device);
Luming Yue9dab192007-08-20 18:23:53 +08001439 struct input_dev *input;
Matthew Garrett17c452f2009-12-11 17:40:46 -05001440 int keycode = 0;
Luming Yue9dab192007-08-20 18:23:53 +08001441
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 if (!video)
Patrick Mocheld550d982006-06-27 00:41:40 -04001443 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444
Luming Yue9dab192007-08-20 18:23:53 +08001445 input = video->input;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
1447 switch (event) {
Julius Volz98fb8fe2007-02-20 16:38:40 +01001448 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 * most likely via hotkey. */
Len Brown14e04fb2007-08-23 15:20:26 -04001450 acpi_bus_generate_proc_event(device, event, 0);
Luca Tettamanti8a37c652012-08-02 15:30:27 +02001451 keycode = KEY_SWITCHVIDEOMODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 break;
1453
Julius Volz98fb8fe2007-02-20 16:38:40 +01001454 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455 * connector. */
1456 acpi_video_device_enumerate(video);
1457 acpi_video_device_rebind(video);
Len Brown14e04fb2007-08-23 15:20:26 -04001458 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08001459 keycode = KEY_SWITCHVIDEOMODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 break;
1461
Len Brown4be44fc2005-08-05 00:44:28 -04001462 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
Len Brown25c87f72007-08-25 01:44:01 -04001463 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08001464 keycode = KEY_SWITCHVIDEOMODE;
1465 break;
Len Brown4be44fc2005-08-05 00:44:28 -04001466 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
Len Brown25c87f72007-08-25 01:44:01 -04001467 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08001468 keycode = KEY_VIDEO_NEXT;
1469 break;
Len Brown4be44fc2005-08-05 00:44:28 -04001470 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
Len Brown14e04fb2007-08-23 15:20:26 -04001471 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08001472 keycode = KEY_VIDEO_PREV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 break;
1474
1475 default:
1476 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -04001477 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 break;
1479 }
1480
Luca Tettamanti8a37c652012-08-02 15:30:27 +02001481 if (acpi_notifier_call_chain(device, event, 0))
1482 /* Something vetoed the keypress. */
1483 keycode = 0;
Matthew Garrett17c452f2009-12-11 17:40:46 -05001484
1485 if (keycode) {
1486 input_report_key(input, keycode, 1);
1487 input_sync(input);
1488 input_report_key(input, keycode, 0);
1489 input_sync(input);
1490 }
Luming Yue9dab192007-08-20 18:23:53 +08001491
Patrick Mocheld550d982006-06-27 00:41:40 -04001492 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493}
1494
Len Brown4be44fc2005-08-05 00:44:28 -04001495static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001497 struct acpi_video_device *video_device = data;
Len Brown4be44fc2005-08-05 00:44:28 -04001498 struct acpi_device *device = NULL;
Luming Yue9dab192007-08-20 18:23:53 +08001499 struct acpi_video_bus *bus;
1500 struct input_dev *input;
Matthew Garrett17c452f2009-12-11 17:40:46 -05001501 int keycode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503 if (!video_device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001504 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505
Patrick Mochele6afa0d2006-05-19 16:54:40 -04001506 device = video_device->dev;
Luming Yue9dab192007-08-20 18:23:53 +08001507 bus = video_device->video;
1508 input = bus->input;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509
1510 switch (event) {
Len Brown4be44fc2005-08-05 00:44:28 -04001511 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
Zhang Rui8a681a42008-01-25 14:47:49 +08001512 if (brightness_switch_enabled)
1513 acpi_video_switch_brightness(video_device, event);
Len Brown25c87f72007-08-25 01:44:01 -04001514 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08001515 keycode = KEY_BRIGHTNESS_CYCLE;
1516 break;
Len Brown4be44fc2005-08-05 00:44:28 -04001517 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
Zhang Rui8a681a42008-01-25 14:47:49 +08001518 if (brightness_switch_enabled)
1519 acpi_video_switch_brightness(video_device, event);
Len Brown25c87f72007-08-25 01:44:01 -04001520 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08001521 keycode = KEY_BRIGHTNESSUP;
1522 break;
Len Brown4be44fc2005-08-05 00:44:28 -04001523 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
Zhang Rui8a681a42008-01-25 14:47:49 +08001524 if (brightness_switch_enabled)
1525 acpi_video_switch_brightness(video_device, event);
Len Brown25c87f72007-08-25 01:44:01 -04001526 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08001527 keycode = KEY_BRIGHTNESSDOWN;
1528 break;
Justin P. Mattock70f23fd2011-05-10 10:16:21 +02001529 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */
Zhang Rui8a681a42008-01-25 14:47:49 +08001530 if (brightness_switch_enabled)
1531 acpi_video_switch_brightness(video_device, event);
Len Brown25c87f72007-08-25 01:44:01 -04001532 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08001533 keycode = KEY_BRIGHTNESS_ZERO;
1534 break;
Len Brown4be44fc2005-08-05 00:44:28 -04001535 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
Zhang Rui8a681a42008-01-25 14:47:49 +08001536 if (brightness_switch_enabled)
1537 acpi_video_switch_brightness(video_device, event);
Len Brown14e04fb2007-08-23 15:20:26 -04001538 acpi_bus_generate_proc_event(device, event, 0);
Luming Yue9dab192007-08-20 18:23:53 +08001539 keycode = KEY_DISPLAY_OFF;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 break;
1541 default:
1542 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -04001543 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544 break;
1545 }
Luming Yue9dab192007-08-20 18:23:53 +08001546
Zhang Rui7761f632008-01-25 14:48:12 +08001547 acpi_notifier_call_chain(device, event, 0);
Matthew Garrett17c452f2009-12-11 17:40:46 -05001548
1549 if (keycode) {
1550 input_report_key(input, keycode, 1);
1551 input_sync(input);
1552 input_report_key(input, keycode, 0);
1553 input_sync(input);
1554 }
Luming Yue9dab192007-08-20 18:23:53 +08001555
Patrick Mocheld550d982006-06-27 00:41:40 -04001556 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557}
1558
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +02001559static int acpi_video_resume(struct notifier_block *nb,
1560 unsigned long val, void *ign)
Matthew Garrett863c1492008-02-04 23:31:24 -08001561{
1562 struct acpi_video_bus *video;
1563 struct acpi_video_device *video_device;
1564 int i;
1565
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +02001566 switch (val) {
1567 case PM_HIBERNATION_PREPARE:
1568 case PM_SUSPEND_PREPARE:
1569 case PM_RESTORE_PREPARE:
1570 return NOTIFY_DONE;
1571 }
Matthew Garrett863c1492008-02-04 23:31:24 -08001572
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +02001573 video = container_of(nb, struct acpi_video_bus, pm_nb);
1574
1575 dev_info(&video->device->dev, "Restoring backlight state\n");
Matthew Garrett863c1492008-02-04 23:31:24 -08001576
1577 for (i = 0; i < video->attached_count; i++) {
1578 video_device = video->attached_array[i].bind_info;
1579 if (video_device && video_device->backlight)
1580 acpi_video_set_brightness(video_device->backlight);
1581 }
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +02001582
1583 return NOTIFY_OK;
Matthew Garrett863c1492008-02-04 23:31:24 -08001584}
1585
Zhang Ruic504f8c2009-12-30 15:59:23 +08001586static acpi_status
1587acpi_video_bus_match(acpi_handle handle, u32 level, void *context,
1588 void **return_value)
1589{
1590 struct acpi_device *device = context;
1591 struct acpi_device *sibling;
1592 int result;
1593
1594 if (handle == device->handle)
1595 return AE_CTRL_TERMINATE;
1596
1597 result = acpi_bus_get_device(handle, &sibling);
1598 if (result)
1599 return AE_OK;
1600
1601 if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME))
1602 return AE_ALREADY_EXISTS;
1603
1604 return AE_OK;
1605}
1606
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +02001607static int instance;
1608
Len Brown4be44fc2005-08-05 00:44:28 -04001609static int acpi_video_bus_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610{
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001611 struct acpi_video_bus *video;
Luming Yue9dab192007-08-20 18:23:53 +08001612 struct input_dev *input;
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001613 int error;
Zhang Ruic504f8c2009-12-30 15:59:23 +08001614 acpi_status status;
1615
1616 status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
1617 device->parent->handle, 1,
1618 acpi_video_bus_match, NULL,
1619 device, NULL);
1620 if (status == AE_ALREADY_EXISTS) {
1621 printk(KERN_WARNING FW_BUG
1622 "Duplicate ACPI video bus devices for the"
1623 " same VGA controller, please try module "
1624 "parameter \"video.allow_duplicates=1\""
1625 "if the current driver doesn't work.\n");
1626 if (!allow_duplicates)
1627 return -ENODEV;
1628 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629
Burman Yan36bcbec2006-12-19 12:56:11 -08001630 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 if (!video)
Patrick Mocheld550d982006-06-27 00:41:40 -04001632 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633
Zhang Ruie6d9da12007-08-25 02:23:31 -04001634 /* a hack to fix the duplicate name "VID" problem on T61 */
1635 if (!strcmp(device->pnp.bus_id, "VID")) {
1636 if (instance)
1637 device->pnp.bus_id[3] = '0' + instance;
1638 instance ++;
1639 }
Zhao Yakuif3b39f12009-02-02 22:55:01 -05001640 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
1641 if (!strcmp(device->pnp.bus_id, "VGA")) {
1642 if (instance)
1643 device->pnp.bus_id[3] = '0' + instance;
1644 instance++;
1645 }
Zhang Ruie6d9da12007-08-25 02:23:31 -04001646
Patrick Mochele6afa0d2006-05-19 16:54:40 -04001647 video->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1649 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07001650 device->driver_data = video;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651
1652 acpi_video_bus_find_cap(video);
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001653 error = acpi_video_bus_check(video);
1654 if (error)
1655 goto err_free_video;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656
Dmitry Torokhovbbac81f2007-11-05 11:43:32 -05001657 mutex_init(&video->device_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658 INIT_LIST_HEAD(&video->video_device_list);
1659
Igor Murzovea9f8852012-03-30 21:32:08 +04001660 error = acpi_video_bus_get_devices(video, device);
1661 if (error)
1662 goto err_free_video;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663
Luming Yue9dab192007-08-20 18:23:53 +08001664 video->input = input = input_allocate_device();
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001665 if (!input) {
1666 error = -ENOMEM;
Igor Murzovb60e7f62012-03-30 21:32:09 +04001667 goto err_put_video;
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001668 }
Luming Yue9dab192007-08-20 18:23:53 +08001669
Igor Murzovb60e7f62012-03-30 21:32:09 +04001670 error = acpi_video_bus_start_devices(video);
1671 if (error)
1672 goto err_free_input_dev;
1673
Luming Yue9dab192007-08-20 18:23:53 +08001674 snprintf(video->phys, sizeof(video->phys),
1675 "%s/video/input0", acpi_device_hid(video->device));
1676
1677 input->name = acpi_device_name(video->device);
1678 input->phys = video->phys;
1679 input->id.bustype = BUS_HOST;
1680 input->id.product = 0x06;
Dmitry Torokhov91c05c62007-11-05 11:43:29 -05001681 input->dev.parent = &device->dev;
Luming Yue9dab192007-08-20 18:23:53 +08001682 input->evbit[0] = BIT(EV_KEY);
1683 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
1684 set_bit(KEY_VIDEO_NEXT, input->keybit);
1685 set_bit(KEY_VIDEO_PREV, input->keybit);
1686 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
1687 set_bit(KEY_BRIGHTNESSUP, input->keybit);
1688 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
1689 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
1690 set_bit(KEY_DISPLAY_OFF, input->keybit);
Luming Yue9dab192007-08-20 18:23:53 +08001691
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001693 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1694 video->flags.multihead ? "yes" : "no",
1695 video->flags.rom ? "yes" : "no",
1696 video->flags.post ? "yes" : "no");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +02001698 video->pm_nb.notifier_call = acpi_video_resume;
1699 video->pm_nb.priority = 0;
Igor Murzovea9f8852012-03-30 21:32:08 +04001700 error = register_pm_notifier(&video->pm_nb);
1701 if (error)
Dan Carpenter301f33f2012-04-04 14:19:16 +03001702 goto err_stop_video;
1703
1704 error = input_register_device(input);
1705 if (error)
1706 goto err_unregister_pm_notifier;
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +02001707
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001708 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709
Dan Carpenter301f33f2012-04-04 14:19:16 +03001710 err_unregister_pm_notifier:
1711 unregister_pm_notifier(&video->pm_nb);
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001712 err_stop_video:
1713 acpi_video_bus_stop_devices(video);
Igor Murzovb60e7f62012-03-30 21:32:09 +04001714 err_free_input_dev:
1715 input_free_device(input);
Igor Murzovea9f8852012-03-30 21:32:08 +04001716 err_put_video:
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001717 acpi_video_bus_put_devices(video);
1718 kfree(video->attached_array);
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001719 err_free_video:
1720 kfree(video);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07001721 device->driver_data = NULL;
Dmitry Torokhovf51e8392007-11-05 11:43:30 -05001722
1723 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724}
1725
Len Brown4be44fc2005-08-05 00:44:28 -04001726static int acpi_video_bus_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727{
Len Brown4be44fc2005-08-05 00:44:28 -04001728 struct acpi_video_bus *video = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730
1731 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001732 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001734 video = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735
Rafael J. Wysockiac7729d2010-04-05 01:43:51 +02001736 unregister_pm_notifier(&video->pm_nb);
1737
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738 acpi_video_bus_stop_devices(video);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 acpi_video_bus_put_devices(video);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740
Luming Yue9dab192007-08-20 18:23:53 +08001741 input_unregister_device(video->input);
Jesper Juhl6044ec82005-11-07 01:01:32 -08001742 kfree(video->attached_array);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 kfree(video);
1744
Patrick Mocheld550d982006-06-27 00:41:40 -04001745 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746}
1747
Alan Coxc6996bd2012-04-25 14:33:48 +01001748static int __init is_i740(struct pci_dev *dev)
1749{
1750 if (dev->device == 0x00D1)
1751 return 1;
1752 if (dev->device == 0x7000)
1753 return 1;
1754 return 0;
1755}
1756
Matthew Garrett74a365b2009-03-19 21:35:39 +00001757static int __init intel_opregion_present(void)
1758{
Alan Coxc6996bd2012-04-25 14:33:48 +01001759 int opregion = 0;
Matthew Garrett74a365b2009-03-19 21:35:39 +00001760 struct pci_dev *dev = NULL;
1761 u32 address;
1762
1763 for_each_pci_dev(dev) {
1764 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
1765 continue;
1766 if (dev->vendor != PCI_VENDOR_ID_INTEL)
1767 continue;
Alan Coxc6996bd2012-04-25 14:33:48 +01001768 /* We don't want to poke around undefined i740 registers */
1769 if (is_i740(dev))
1770 continue;
Matthew Garrett74a365b2009-03-19 21:35:39 +00001771 pci_read_config_dword(dev, 0xfc, &address);
1772 if (!address)
1773 continue;
Alan Coxc6996bd2012-04-25 14:33:48 +01001774 opregion = 1;
Matthew Garrett74a365b2009-03-19 21:35:39 +00001775 }
Alan Coxc6996bd2012-04-25 14:33:48 +01001776 return opregion;
Matthew Garrett74a365b2009-03-19 21:35:39 +00001777}
1778
1779int acpi_video_register(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780{
Len Brown4be44fc2005-08-05 00:44:28 -04001781 int result = 0;
Zhao Yakui86e437f2009-06-16 11:23:13 +08001782 if (register_count) {
1783 /*
1784 * if the function of acpi_video_register is already called,
1785 * don't register the acpi_vide_bus again and return no error.
1786 */
1787 return 0;
1788 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790 result = acpi_bus_register_driver(&acpi_video_bus);
Zhang Rui39fe3942010-10-08 13:55:11 +08001791 if (result < 0)
Patrick Mocheld550d982006-06-27 00:41:40 -04001792 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793
Zhao Yakui86e437f2009-06-16 11:23:13 +08001794 /*
1795 * When the acpi_video_bus is loaded successfully, increase
1796 * the counter reference.
1797 */
1798 register_count = 1;
1799
Patrick Mocheld550d982006-06-27 00:41:40 -04001800 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801}
Matthew Garrett74a365b2009-03-19 21:35:39 +00001802EXPORT_SYMBOL(acpi_video_register);
1803
Zhao Yakui86e437f2009-06-16 11:23:13 +08001804void acpi_video_unregister(void)
1805{
1806 if (!register_count) {
1807 /*
1808 * If the acpi video bus is already unloaded, don't
1809 * unload it again and return directly.
1810 */
1811 return;
1812 }
1813 acpi_bus_unregister_driver(&acpi_video_bus);
1814
Zhao Yakui86e437f2009-06-16 11:23:13 +08001815 register_count = 0;
1816
1817 return;
1818}
1819EXPORT_SYMBOL(acpi_video_unregister);
1820
Matthew Garrett74a365b2009-03-19 21:35:39 +00001821/*
1822 * This is kind of nasty. Hardware using Intel chipsets may require
1823 * the video opregion code to be run first in order to initialise
1824 * state before any ACPI video calls are made. To handle this we defer
1825 * registration of the video class until the opregion code has run.
1826 */
1827
1828static int __init acpi_video_init(void)
1829{
Zhang Rui45cb50e2009-04-24 12:13:18 -04001830 dmi_check_system(video_dmi_table);
1831
Matthew Garrett74a365b2009-03-19 21:35:39 +00001832 if (intel_opregion_present())
1833 return 0;
1834
1835 return acpi_video_register();
1836}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837
Zhao Yakui86e437f2009-06-16 11:23:13 +08001838static void __exit acpi_video_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839{
Zhao Yakui86e437f2009-06-16 11:23:13 +08001840 acpi_video_unregister();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841
Patrick Mocheld550d982006-06-27 00:41:40 -04001842 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844
1845module_init(acpi_video_init);
1846module_exit(acpi_video_exit);