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![Hans de Goede](/assets/img/avatar_default.png)
Link: https://bugs.freedesktop.org/show_bug.cgi?id=81515 Reported-and-tested-by: Hohahiu <rakothedin@gmail.com> Cc: 3.16+ <stable@vger.kernel.org> # 3.16+ Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2350 lines
58 KiB
C
2350 lines
58 KiB
C
/*
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* video.c - ACPI Video Driver
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*
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* Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
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* Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
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* Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/input.h>
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#include <linux/backlight.h>
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#include <linux/thermal.h>
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#include <linux/sort.h>
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#include <linux/pci.h>
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#include <linux/pci_ids.h>
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#include <linux/slab.h>
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#include <linux/dmi.h>
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#include <linux/suspend.h>
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#include <linux/acpi.h>
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#include <acpi/video.h>
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#include <asm/uaccess.h>
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#include "internal.h"
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#define ACPI_VIDEO_BUS_NAME "Video Bus"
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#define ACPI_VIDEO_DEVICE_NAME "Video Device"
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#define ACPI_VIDEO_NOTIFY_SWITCH 0x80
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#define ACPI_VIDEO_NOTIFY_PROBE 0x81
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#define ACPI_VIDEO_NOTIFY_CYCLE 0x82
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#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
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#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
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#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
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#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
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#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
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#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
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#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
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#define MAX_NAME_LEN 20
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#define _COMPONENT ACPI_VIDEO_COMPONENT
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ACPI_MODULE_NAME("video");
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MODULE_AUTHOR("Bruno Ducrot");
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MODULE_DESCRIPTION("ACPI Video Driver");
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MODULE_LICENSE("GPL");
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static bool brightness_switch_enabled = 1;
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module_param(brightness_switch_enabled, bool, 0644);
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/*
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* By default, we don't allow duplicate ACPI video bus devices
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* under the same VGA controller
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*/
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static bool allow_duplicates;
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module_param(allow_duplicates, bool, 0644);
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/*
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* For Windows 8 systems: used to decide if video module
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* should skip registering backlight interface of its own.
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*/
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static int use_native_backlight_param = -1;
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module_param_named(use_native_backlight, use_native_backlight_param, int, 0444);
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static bool use_native_backlight_dmi = true;
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static int register_count;
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static struct mutex video_list_lock;
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static struct list_head video_bus_head;
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static int acpi_video_bus_add(struct acpi_device *device);
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static int acpi_video_bus_remove(struct acpi_device *device);
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static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
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static const struct acpi_device_id video_device_ids[] = {
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{ACPI_VIDEO_HID, 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, video_device_ids);
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static struct acpi_driver acpi_video_bus = {
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.name = "video",
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.class = ACPI_VIDEO_CLASS,
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.ids = video_device_ids,
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.ops = {
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.add = acpi_video_bus_add,
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.remove = acpi_video_bus_remove,
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.notify = acpi_video_bus_notify,
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},
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};
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struct acpi_video_bus_flags {
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u8 multihead:1; /* can switch video heads */
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u8 rom:1; /* can retrieve a video rom */
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u8 post:1; /* can configure the head to */
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u8 reserved:5;
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};
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struct acpi_video_bus_cap {
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u8 _DOS:1; /* Enable/Disable output switching */
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u8 _DOD:1; /* Enumerate all devices attached to display adapter */
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u8 _ROM:1; /* Get ROM Data */
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u8 _GPD:1; /* Get POST Device */
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u8 _SPD:1; /* Set POST Device */
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u8 _VPO:1; /* Video POST Options */
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u8 reserved:2;
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};
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struct acpi_video_device_attrib {
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u32 display_index:4; /* A zero-based instance of the Display */
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u32 display_port_attachment:4; /* This field differentiates the display type */
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u32 display_type:4; /* Describe the specific type in use */
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u32 vendor_specific:4; /* Chipset Vendor Specific */
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u32 bios_can_detect:1; /* BIOS can detect the device */
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u32 depend_on_vga:1; /* Non-VGA output device whose power is related to
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the VGA device. */
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u32 pipe_id:3; /* For VGA multiple-head devices. */
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u32 reserved:10; /* Must be 0 */
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u32 device_id_scheme:1; /* Device ID Scheme */
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};
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struct acpi_video_enumerated_device {
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union {
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u32 int_val;
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struct acpi_video_device_attrib attrib;
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} value;
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struct acpi_video_device *bind_info;
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};
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struct acpi_video_bus {
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struct acpi_device *device;
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bool backlight_registered;
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bool backlight_notifier_registered;
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u8 dos_setting;
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struct acpi_video_enumerated_device *attached_array;
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u8 attached_count;
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struct acpi_video_bus_cap cap;
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struct acpi_video_bus_flags flags;
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struct list_head video_device_list;
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struct mutex device_list_lock; /* protects video_device_list */
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struct list_head entry;
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struct input_dev *input;
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char phys[32]; /* for input device */
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struct notifier_block pm_nb;
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struct notifier_block backlight_nb;
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};
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struct acpi_video_device_flags {
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u8 crt:1;
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u8 lcd:1;
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u8 tvout:1;
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u8 dvi:1;
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u8 bios:1;
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u8 unknown:1;
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u8 notify:1;
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u8 reserved:1;
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};
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struct acpi_video_device_cap {
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u8 _ADR:1; /* Return the unique ID */
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u8 _BCL:1; /* Query list of brightness control levels supported */
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u8 _BCM:1; /* Set the brightness level */
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u8 _BQC:1; /* Get current brightness level */
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u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
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u8 _DDC:1; /* Return the EDID for this device */
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};
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struct acpi_video_brightness_flags {
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u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
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u8 _BCL_reversed:1; /* _BCL package is in a reversed order */
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u8 _BQC_use_index:1; /* _BQC returns an index value */
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};
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struct acpi_video_device_brightness {
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int curr;
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int count;
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int *levels;
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struct acpi_video_brightness_flags flags;
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};
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struct acpi_video_device {
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unsigned long device_id;
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struct acpi_video_device_flags flags;
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struct acpi_video_device_cap cap;
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struct list_head entry;
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struct delayed_work switch_brightness_work;
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int switch_brightness_event;
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struct acpi_video_bus *video;
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struct acpi_device *dev;
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struct acpi_video_device_brightness *brightness;
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struct backlight_device *backlight;
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struct thermal_cooling_device *cooling_dev;
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};
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static const char device_decode[][30] = {
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"motherboard VGA device",
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"PCI VGA device",
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"AGP VGA device",
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"UNKNOWN",
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};
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static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
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static void acpi_video_device_rebind(struct acpi_video_bus *video);
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static void acpi_video_device_bind(struct acpi_video_bus *video,
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struct acpi_video_device *device);
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static int acpi_video_device_enumerate(struct acpi_video_bus *video);
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static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
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int level);
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static int acpi_video_device_lcd_get_level_current(
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struct acpi_video_device *device,
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unsigned long long *level, bool raw);
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static int acpi_video_get_next_level(struct acpi_video_device *device,
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u32 level_current, u32 event);
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static void acpi_video_switch_brightness(struct work_struct *work);
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static bool acpi_video_use_native_backlight(void)
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{
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if (use_native_backlight_param != -1)
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return use_native_backlight_param;
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else
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return use_native_backlight_dmi;
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}
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bool acpi_video_verify_backlight_support(void)
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{
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if (acpi_osi_is_win8() && acpi_video_use_native_backlight() &&
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backlight_device_registered(BACKLIGHT_RAW))
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return false;
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return acpi_video_backlight_support();
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}
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EXPORT_SYMBOL_GPL(acpi_video_verify_backlight_support);
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/* backlight device sysfs support */
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static int acpi_video_get_brightness(struct backlight_device *bd)
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{
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unsigned long long cur_level;
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int i;
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struct acpi_video_device *vd = bl_get_data(bd);
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if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false))
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return -EINVAL;
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for (i = 2; i < vd->brightness->count; i++) {
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if (vd->brightness->levels[i] == cur_level)
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/*
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* The first two entries are special - see page 575
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* of the ACPI spec 3.0
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*/
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return i - 2;
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}
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return 0;
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}
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static int acpi_video_set_brightness(struct backlight_device *bd)
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{
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int request_level = bd->props.brightness + 2;
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struct acpi_video_device *vd = bl_get_data(bd);
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cancel_delayed_work(&vd->switch_brightness_work);
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return acpi_video_device_lcd_set_level(vd,
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vd->brightness->levels[request_level]);
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}
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static const struct backlight_ops acpi_backlight_ops = {
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.get_brightness = acpi_video_get_brightness,
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.update_status = acpi_video_set_brightness,
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};
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/* thermal cooling device callbacks */
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static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned
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long *state)
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{
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struct acpi_device *device = cooling_dev->devdata;
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struct acpi_video_device *video = acpi_driver_data(device);
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*state = video->brightness->count - 3;
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return 0;
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}
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static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned
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long *state)
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{
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struct acpi_device *device = cooling_dev->devdata;
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struct acpi_video_device *video = acpi_driver_data(device);
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unsigned long long level;
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int offset;
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if (acpi_video_device_lcd_get_level_current(video, &level, false))
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return -EINVAL;
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for (offset = 2; offset < video->brightness->count; offset++)
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if (level == video->brightness->levels[offset]) {
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*state = video->brightness->count - offset - 1;
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return 0;
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}
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return -EINVAL;
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}
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static int
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video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state)
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{
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struct acpi_device *device = cooling_dev->devdata;
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struct acpi_video_device *video = acpi_driver_data(device);
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int level;
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if (state >= video->brightness->count - 2)
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return -EINVAL;
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state = video->brightness->count - state;
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level = video->brightness->levels[state - 1];
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return acpi_video_device_lcd_set_level(video, level);
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}
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static const struct thermal_cooling_device_ops video_cooling_ops = {
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.get_max_state = video_get_max_state,
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.get_cur_state = video_get_cur_state,
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.set_cur_state = video_set_cur_state,
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};
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/*
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* --------------------------------------------------------------------------
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* Video Management
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* --------------------------------------------------------------------------
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*/
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static int
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acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
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union acpi_object **levels)
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{
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int status;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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*levels = NULL;
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status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
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if (!ACPI_SUCCESS(status))
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return status;
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obj = (union acpi_object *)buffer.pointer;
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if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
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printk(KERN_ERR PREFIX "Invalid _BCL data\n");
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status = -EFAULT;
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goto err;
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}
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*levels = obj;
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return 0;
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err:
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kfree(buffer.pointer);
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return status;
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}
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static int
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acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
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{
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int status;
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int state;
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status = acpi_execute_simple_method(device->dev->handle,
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"_BCM", level);
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
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return -EIO;
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}
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device->brightness->curr = level;
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for (state = 2; state < device->brightness->count; state++)
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if (level == device->brightness->levels[state]) {
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if (device->backlight)
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device->backlight->props.brightness = state - 2;
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return 0;
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}
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ACPI_ERROR((AE_INFO, "Current brightness invalid"));
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return -EINVAL;
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}
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/*
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* For some buggy _BQC methods, we need to add a constant value to
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* the _BQC return value to get the actual current brightness level
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*/
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static int bqc_offset_aml_bug_workaround;
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static int __init video_set_bqc_offset(const struct dmi_system_id *d)
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{
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bqc_offset_aml_bug_workaround = 9;
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return 0;
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}
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static int __init video_set_use_native_backlight(const struct dmi_system_id *d)
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{
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use_native_backlight_dmi = true;
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return 0;
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}
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static int __init video_disable_native_backlight(const struct dmi_system_id *d)
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{
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use_native_backlight_dmi = false;
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return 0;
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}
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static struct dmi_system_id video_dmi_table[] __initdata = {
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/*
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* Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
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*/
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{
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.callback = video_set_bqc_offset,
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.ident = "Acer Aspire 5720",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
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},
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},
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{
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.callback = video_set_bqc_offset,
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.ident = "Acer Aspire 5710Z",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
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},
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},
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{
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.callback = video_set_bqc_offset,
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.ident = "eMachines E510",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
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DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
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},
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},
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{
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.callback = video_set_bqc_offset,
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.ident = "Acer Aspire 5315",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
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},
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},
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{
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.callback = video_set_bqc_offset,
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.ident = "Acer Aspire 7720",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
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},
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},
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{
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.callback = video_set_use_native_backlight,
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.ident = "ThinkPad X230",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"),
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},
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},
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{
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.callback = video_set_use_native_backlight,
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.ident = "ThinkPad T430 and T430s",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430"),
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},
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},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "ThinkPad T430",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "2349D15"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "ThinkPad T431s",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "20AACTO1WW"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "ThinkPad Edge E530",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "3259A2G"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "ThinkPad Edge E530",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "3259CTO"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "ThinkPad Edge E530",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "3259HJG"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "ThinkPad W530",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W530"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "ThinkPad X1 Carbon",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Lenovo Yoga 13",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Lenovo Yoga 2 11",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2 11"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Thinkpad Helix",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Dell Inspiron 7520",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Acer Aspire 5733Z",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5733Z"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Acer Aspire 5742G",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5742G"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Acer Aspire V5-171",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "V5-171"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Acer Aspire V5-431",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-431"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Acer Aspire V5-471G",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-471G"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Acer TravelMate B113",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate B113"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Acer Aspire V5-572G",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Acer Aspire"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "V5-572G/Dazzle_CX"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "Acer Aspire V5-573G",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Acer Aspire"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "V5-573G/Dazzle_HW"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "ASUS Zenbook Prime UX31A",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "UX31A"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP ProBook 4340s",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4340s"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP ProBook 4540s",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4540s"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP ProBook 2013 models",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook "),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, " G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP EliteBook 2013 models",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, " G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP EliteBook 2014 models",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, " G2"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP ZBook 14",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 14"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP ZBook 15",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 15"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP ZBook 17",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 17"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP EliteBook 8470p",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8470p"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_use_native_backlight,
|
|
.ident = "HP EliteBook 8780w",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"),
|
|
},
|
|
},
|
|
|
|
/*
|
|
* These models have a working acpi_video backlight control, and using
|
|
* native backlight causes a regression where backlight does not work
|
|
* when userspace is not handling brightness key events. Disable
|
|
* native_backlight on these to fix this:
|
|
* https://bugzilla.kernel.org/show_bug.cgi?id=81691
|
|
*/
|
|
{
|
|
.callback = video_disable_native_backlight,
|
|
.ident = "ThinkPad T420",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_disable_native_backlight,
|
|
.ident = "ThinkPad T520",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"),
|
|
},
|
|
},
|
|
|
|
/* The native backlight controls do not work on some older machines */
|
|
{
|
|
/* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */
|
|
.callback = video_disable_native_backlight,
|
|
.ident = "HP ENVY 15 Notebook",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
|
|
static unsigned long long
|
|
acpi_video_bqc_value_to_level(struct acpi_video_device *device,
|
|
unsigned long long bqc_value)
|
|
{
|
|
unsigned long long level;
|
|
|
|
if (device->brightness->flags._BQC_use_index) {
|
|
/*
|
|
* _BQC returns an index that doesn't account for
|
|
* the first 2 items with special meaning, so we need
|
|
* to compensate for that by offsetting ourselves
|
|
*/
|
|
if (device->brightness->flags._BCL_reversed)
|
|
bqc_value = device->brightness->count - 3 - bqc_value;
|
|
|
|
level = device->brightness->levels[bqc_value + 2];
|
|
} else {
|
|
level = bqc_value;
|
|
}
|
|
|
|
level += bqc_offset_aml_bug_workaround;
|
|
|
|
return level;
|
|
}
|
|
|
|
static int
|
|
acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
|
|
unsigned long long *level, bool raw)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
int i;
|
|
|
|
if (device->cap._BQC || device->cap._BCQ) {
|
|
char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
|
|
|
|
status = acpi_evaluate_integer(device->dev->handle, buf,
|
|
NULL, level);
|
|
if (ACPI_SUCCESS(status)) {
|
|
if (raw) {
|
|
/*
|
|
* Caller has indicated he wants the raw
|
|
* value returned by _BQC, so don't furtherly
|
|
* mess with the value.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
*level = acpi_video_bqc_value_to_level(device, *level);
|
|
|
|
for (i = 2; i < device->brightness->count; i++)
|
|
if (device->brightness->levels[i] == *level) {
|
|
device->brightness->curr = *level;
|
|
return 0;
|
|
}
|
|
/*
|
|
* BQC returned an invalid level.
|
|
* Stop using it.
|
|
*/
|
|
ACPI_WARNING((AE_INFO,
|
|
"%s returned an invalid level",
|
|
buf));
|
|
device->cap._BQC = device->cap._BCQ = 0;
|
|
} else {
|
|
/*
|
|
* Fixme:
|
|
* should we return an error or ignore this failure?
|
|
* dev->brightness->curr is a cached value which stores
|
|
* the correct current backlight level in most cases.
|
|
* ACPI video backlight still works w/ buggy _BQC.
|
|
* http://bugzilla.kernel.org/show_bug.cgi?id=12233
|
|
*/
|
|
ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
|
|
device->cap._BQC = device->cap._BCQ = 0;
|
|
}
|
|
}
|
|
|
|
*level = device->brightness->curr;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acpi_video_device_EDID(struct acpi_video_device *device,
|
|
union acpi_object **edid, ssize_t length)
|
|
{
|
|
int status;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *obj;
|
|
union acpi_object arg0 = { ACPI_TYPE_INTEGER };
|
|
struct acpi_object_list args = { 1, &arg0 };
|
|
|
|
|
|
*edid = NULL;
|
|
|
|
if (!device)
|
|
return -ENODEV;
|
|
if (length == 128)
|
|
arg0.integer.value = 1;
|
|
else if (length == 256)
|
|
arg0.integer.value = 2;
|
|
else
|
|
return -EINVAL;
|
|
|
|
status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
obj = buffer.pointer;
|
|
|
|
if (obj && obj->type == ACPI_TYPE_BUFFER)
|
|
*edid = obj;
|
|
else {
|
|
printk(KERN_ERR PREFIX "Invalid _DDC data\n");
|
|
status = -EFAULT;
|
|
kfree(obj);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/* bus */
|
|
|
|
/*
|
|
* Arg:
|
|
* video : video bus device pointer
|
|
* bios_flag :
|
|
* 0. The system BIOS should NOT automatically switch(toggle)
|
|
* the active display output.
|
|
* 1. The system BIOS should automatically switch (toggle) the
|
|
* active display output. No switch event.
|
|
* 2. The _DGS value should be locked.
|
|
* 3. The system BIOS should not automatically switch (toggle) the
|
|
* active display output, but instead generate the display switch
|
|
* event notify code.
|
|
* lcd_flag :
|
|
* 0. The system BIOS should automatically control the brightness level
|
|
* of the LCD when the power changes from AC to DC
|
|
* 1. The system BIOS should NOT automatically control the brightness
|
|
* level of the LCD when the power changes from AC to DC.
|
|
* Return Value:
|
|
* -EINVAL wrong arg.
|
|
*/
|
|
|
|
static int
|
|
acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (!video->cap._DOS)
|
|
return 0;
|
|
|
|
if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1)
|
|
return -EINVAL;
|
|
video->dos_setting = (lcd_flag << 2) | bios_flag;
|
|
status = acpi_execute_simple_method(video->device->handle, "_DOS",
|
|
(lcd_flag << 2) | bios_flag);
|
|
if (ACPI_FAILURE(status))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Simple comparison function used to sort backlight levels.
|
|
*/
|
|
|
|
static int
|
|
acpi_video_cmp_level(const void *a, const void *b)
|
|
{
|
|
return *(int *)a - *(int *)b;
|
|
}
|
|
|
|
/*
|
|
* Decides if _BQC/_BCQ for this system is usable
|
|
*
|
|
* We do this by changing the level first and then read out the current
|
|
* brightness level, if the value does not match, find out if it is using
|
|
* index. If not, clear the _BQC/_BCQ capability.
|
|
*/
|
|
static int acpi_video_bqc_quirk(struct acpi_video_device *device,
|
|
int max_level, int current_level)
|
|
{
|
|
struct acpi_video_device_brightness *br = device->brightness;
|
|
int result;
|
|
unsigned long long level;
|
|
int test_level;
|
|
|
|
/* don't mess with existing known broken systems */
|
|
if (bqc_offset_aml_bug_workaround)
|
|
return 0;
|
|
|
|
/*
|
|
* Some systems always report current brightness level as maximum
|
|
* through _BQC, we need to test another value for them.
|
|
*/
|
|
test_level = current_level == max_level ? br->levels[3] : max_level;
|
|
|
|
result = acpi_video_device_lcd_set_level(device, test_level);
|
|
if (result)
|
|
return result;
|
|
|
|
result = acpi_video_device_lcd_get_level_current(device, &level, true);
|
|
if (result)
|
|
return result;
|
|
|
|
if (level != test_level) {
|
|
/* buggy _BQC found, need to find out if it uses index */
|
|
if (level < br->count) {
|
|
if (br->flags._BCL_reversed)
|
|
level = br->count - 3 - level;
|
|
if (br->levels[level + 2] == test_level)
|
|
br->flags._BQC_use_index = 1;
|
|
}
|
|
|
|
if (!br->flags._BQC_use_index)
|
|
device->cap._BQC = device->cap._BCQ = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Arg:
|
|
* device : video output device (LCD, CRT, ..)
|
|
*
|
|
* Return Value:
|
|
* Maximum brightness level
|
|
*
|
|
* Allocate and initialize device->brightness.
|
|
*/
|
|
|
|
static int
|
|
acpi_video_init_brightness(struct acpi_video_device *device)
|
|
{
|
|
union acpi_object *obj = NULL;
|
|
int i, max_level = 0, count = 0, level_ac_battery = 0;
|
|
unsigned long long level, level_old;
|
|
union acpi_object *o;
|
|
struct acpi_video_device_brightness *br = NULL;
|
|
int result = -EINVAL;
|
|
u32 value;
|
|
|
|
if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
|
|
"LCD brightness level\n"));
|
|
goto out;
|
|
}
|
|
|
|
if (obj->package.count < 2)
|
|
goto out;
|
|
|
|
br = kzalloc(sizeof(*br), GFP_KERNEL);
|
|
if (!br) {
|
|
printk(KERN_ERR "can't allocate memory\n");
|
|
result = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
|
|
GFP_KERNEL);
|
|
if (!br->levels) {
|
|
result = -ENOMEM;
|
|
goto out_free;
|
|
}
|
|
|
|
for (i = 0; i < obj->package.count; i++) {
|
|
o = (union acpi_object *)&obj->package.elements[i];
|
|
if (o->type != ACPI_TYPE_INTEGER) {
|
|
printk(KERN_ERR PREFIX "Invalid data\n");
|
|
continue;
|
|
}
|
|
value = (u32) o->integer.value;
|
|
/* Skip duplicate entries */
|
|
if (count > 2 && br->levels[count - 1] == value)
|
|
continue;
|
|
|
|
br->levels[count] = value;
|
|
|
|
if (br->levels[count] > max_level)
|
|
max_level = br->levels[count];
|
|
count++;
|
|
}
|
|
|
|
/*
|
|
* some buggy BIOS don't export the levels
|
|
* when machine is on AC/Battery in _BCL package.
|
|
* In this case, the first two elements in _BCL packages
|
|
* are also supported brightness levels that OS should take care of.
|
|
*/
|
|
for (i = 2; i < count; i++) {
|
|
if (br->levels[i] == br->levels[0])
|
|
level_ac_battery++;
|
|
if (br->levels[i] == br->levels[1])
|
|
level_ac_battery++;
|
|
}
|
|
|
|
if (level_ac_battery < 2) {
|
|
level_ac_battery = 2 - level_ac_battery;
|
|
br->flags._BCL_no_ac_battery_levels = 1;
|
|
for (i = (count - 1 + level_ac_battery); i >= 2; i--)
|
|
br->levels[i] = br->levels[i - level_ac_battery];
|
|
count += level_ac_battery;
|
|
} else if (level_ac_battery > 2)
|
|
ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package"));
|
|
|
|
/* Check if the _BCL package is in a reversed order */
|
|
if (max_level == br->levels[2]) {
|
|
br->flags._BCL_reversed = 1;
|
|
sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
|
|
acpi_video_cmp_level, NULL);
|
|
} else if (max_level != br->levels[count - 1])
|
|
ACPI_ERROR((AE_INFO,
|
|
"Found unordered _BCL package"));
|
|
|
|
br->count = count;
|
|
device->brightness = br;
|
|
|
|
/* _BQC uses INDEX while _BCL uses VALUE in some laptops */
|
|
br->curr = level = max_level;
|
|
|
|
if (!device->cap._BQC)
|
|
goto set_level;
|
|
|
|
result = acpi_video_device_lcd_get_level_current(device,
|
|
&level_old, true);
|
|
if (result)
|
|
goto out_free_levels;
|
|
|
|
result = acpi_video_bqc_quirk(device, max_level, level_old);
|
|
if (result)
|
|
goto out_free_levels;
|
|
/*
|
|
* cap._BQC may get cleared due to _BQC is found to be broken
|
|
* in acpi_video_bqc_quirk, so check again here.
|
|
*/
|
|
if (!device->cap._BQC)
|
|
goto set_level;
|
|
|
|
level = acpi_video_bqc_value_to_level(device, level_old);
|
|
/*
|
|
* On some buggy laptops, _BQC returns an uninitialized
|
|
* value when invoked for the first time, i.e.
|
|
* level_old is invalid (no matter whether it's a level
|
|
* or an index). Set the backlight to max_level in this case.
|
|
*/
|
|
for (i = 2; i < br->count; i++)
|
|
if (level == br->levels[i])
|
|
break;
|
|
if (i == br->count || !level)
|
|
level = max_level;
|
|
|
|
set_level:
|
|
result = acpi_video_device_lcd_set_level(device, level);
|
|
if (result)
|
|
goto out_free_levels;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"found %d brightness levels\n", count - 2));
|
|
kfree(obj);
|
|
return result;
|
|
|
|
out_free_levels:
|
|
kfree(br->levels);
|
|
out_free:
|
|
kfree(br);
|
|
out:
|
|
device->brightness = NULL;
|
|
kfree(obj);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* device : video output device (LCD, CRT, ..)
|
|
*
|
|
* Return Value:
|
|
* None
|
|
*
|
|
* Find out all required AML methods defined under the output
|
|
* device.
|
|
*/
|
|
|
|
static void acpi_video_device_find_cap(struct acpi_video_device *device)
|
|
{
|
|
if (acpi_has_method(device->dev->handle, "_ADR"))
|
|
device->cap._ADR = 1;
|
|
if (acpi_has_method(device->dev->handle, "_BCL"))
|
|
device->cap._BCL = 1;
|
|
if (acpi_has_method(device->dev->handle, "_BCM"))
|
|
device->cap._BCM = 1;
|
|
if (acpi_has_method(device->dev->handle, "_BQC")) {
|
|
device->cap._BQC = 1;
|
|
} else if (acpi_has_method(device->dev->handle, "_BCQ")) {
|
|
printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
|
|
device->cap._BCQ = 1;
|
|
}
|
|
|
|
if (acpi_has_method(device->dev->handle, "_DDC"))
|
|
device->cap._DDC = 1;
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* device : video output device (VGA)
|
|
*
|
|
* Return Value:
|
|
* None
|
|
*
|
|
* Find out all required AML methods defined under the video bus device.
|
|
*/
|
|
|
|
static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
|
|
{
|
|
if (acpi_has_method(video->device->handle, "_DOS"))
|
|
video->cap._DOS = 1;
|
|
if (acpi_has_method(video->device->handle, "_DOD"))
|
|
video->cap._DOD = 1;
|
|
if (acpi_has_method(video->device->handle, "_ROM"))
|
|
video->cap._ROM = 1;
|
|
if (acpi_has_method(video->device->handle, "_GPD"))
|
|
video->cap._GPD = 1;
|
|
if (acpi_has_method(video->device->handle, "_SPD"))
|
|
video->cap._SPD = 1;
|
|
if (acpi_has_method(video->device->handle, "_VPO"))
|
|
video->cap._VPO = 1;
|
|
}
|
|
|
|
/*
|
|
* Check whether the video bus device has required AML method to
|
|
* support the desired features
|
|
*/
|
|
|
|
static int acpi_video_bus_check(struct acpi_video_bus *video)
|
|
{
|
|
acpi_status status = -ENOENT;
|
|
struct pci_dev *dev;
|
|
|
|
if (!video)
|
|
return -EINVAL;
|
|
|
|
dev = acpi_get_pci_dev(video->device->handle);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
pci_dev_put(dev);
|
|
|
|
/*
|
|
* Since there is no HID, CID and so on for VGA driver, we have
|
|
* to check well known required nodes.
|
|
*/
|
|
|
|
/* Does this device support video switching? */
|
|
if (video->cap._DOS || video->cap._DOD) {
|
|
if (!video->cap._DOS) {
|
|
printk(KERN_WARNING FW_BUG
|
|
"ACPI(%s) defines _DOD but not _DOS\n",
|
|
acpi_device_bid(video->device));
|
|
}
|
|
video->flags.multihead = 1;
|
|
status = 0;
|
|
}
|
|
|
|
/* Does this device support retrieving a video ROM? */
|
|
if (video->cap._ROM) {
|
|
video->flags.rom = 1;
|
|
status = 0;
|
|
}
|
|
|
|
/* Does this device support configuring which video device to POST? */
|
|
if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
|
|
video->flags.post = 1;
|
|
status = 0;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* --------------------------------------------------------------------------
|
|
* Driver Interface
|
|
* --------------------------------------------------------------------------
|
|
*/
|
|
|
|
/* device interface */
|
|
static struct acpi_video_device_attrib *
|
|
acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
|
|
{
|
|
struct acpi_video_enumerated_device *ids;
|
|
int i;
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
ids = &video->attached_array[i];
|
|
if ((ids->value.int_val & 0xffff) == device_id)
|
|
return &ids->value.attrib;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
acpi_video_get_device_type(struct acpi_video_bus *video,
|
|
unsigned long device_id)
|
|
{
|
|
struct acpi_video_enumerated_device *ids;
|
|
int i;
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
ids = &video->attached_array[i];
|
|
if ((ids->value.int_val & 0xffff) == device_id)
|
|
return ids->value.int_val;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acpi_video_bus_get_one_device(struct acpi_device *device,
|
|
struct acpi_video_bus *video)
|
|
{
|
|
unsigned long long device_id;
|
|
int status, device_type;
|
|
struct acpi_video_device *data;
|
|
struct acpi_video_device_attrib *attribute;
|
|
|
|
status =
|
|
acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
|
|
/* Some device omits _ADR, we skip them instead of fail */
|
|
if (ACPI_FAILURE(status))
|
|
return 0;
|
|
|
|
data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
|
|
device->driver_data = data;
|
|
|
|
data->device_id = device_id;
|
|
data->video = video;
|
|
data->dev = device;
|
|
INIT_DELAYED_WORK(&data->switch_brightness_work,
|
|
acpi_video_switch_brightness);
|
|
|
|
attribute = acpi_video_get_device_attr(video, device_id);
|
|
|
|
if (attribute && attribute->device_id_scheme) {
|
|
switch (attribute->display_type) {
|
|
case ACPI_VIDEO_DISPLAY_CRT:
|
|
data->flags.crt = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_TV:
|
|
data->flags.tvout = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_DVI:
|
|
data->flags.dvi = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_LCD:
|
|
data->flags.lcd = 1;
|
|
break;
|
|
default:
|
|
data->flags.unknown = 1;
|
|
break;
|
|
}
|
|
if (attribute->bios_can_detect)
|
|
data->flags.bios = 1;
|
|
} else {
|
|
/* Check for legacy IDs */
|
|
device_type = acpi_video_get_device_type(video, device_id);
|
|
/* Ignore bits 16 and 18-20 */
|
|
switch (device_type & 0xffe2ffff) {
|
|
case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR:
|
|
data->flags.crt = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_LEGACY_PANEL:
|
|
data->flags.lcd = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_LEGACY_TV:
|
|
data->flags.tvout = 1;
|
|
break;
|
|
default:
|
|
data->flags.unknown = 1;
|
|
}
|
|
}
|
|
|
|
acpi_video_device_bind(video, data);
|
|
acpi_video_device_find_cap(data);
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
list_add_tail(&data->entry, &video->video_device_list);
|
|
mutex_unlock(&video->device_list_lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* video : video bus device
|
|
*
|
|
* Return:
|
|
* none
|
|
*
|
|
* Enumerate the video device list of the video bus,
|
|
* bind the ids with the corresponding video devices
|
|
* under the video bus.
|
|
*/
|
|
|
|
static void acpi_video_device_rebind(struct acpi_video_bus *video)
|
|
{
|
|
struct acpi_video_device *dev;
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
|
|
list_for_each_entry(dev, &video->video_device_list, entry)
|
|
acpi_video_device_bind(video, dev);
|
|
|
|
mutex_unlock(&video->device_list_lock);
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* video : video bus device
|
|
* device : video output device under the video
|
|
* bus
|
|
*
|
|
* Return:
|
|
* none
|
|
*
|
|
* Bind the ids with the corresponding video devices
|
|
* under the video bus.
|
|
*/
|
|
|
|
static void
|
|
acpi_video_device_bind(struct acpi_video_bus *video,
|
|
struct acpi_video_device *device)
|
|
{
|
|
struct acpi_video_enumerated_device *ids;
|
|
int i;
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
ids = &video->attached_array[i];
|
|
if (device->device_id == (ids->value.int_val & 0xffff)) {
|
|
ids->bind_info = device;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* video : video bus device
|
|
*
|
|
* Return:
|
|
* < 0 : error
|
|
*
|
|
* Call _DOD to enumerate all devices attached to display adapter
|
|
*
|
|
*/
|
|
|
|
static int acpi_video_device_enumerate(struct acpi_video_bus *video)
|
|
{
|
|
int status;
|
|
int count;
|
|
int i;
|
|
struct acpi_video_enumerated_device *active_list;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *dod = NULL;
|
|
union acpi_object *obj;
|
|
|
|
status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
|
|
if (!ACPI_SUCCESS(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
|
|
return status;
|
|
}
|
|
|
|
dod = buffer.pointer;
|
|
if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
|
|
status = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
|
|
dod->package.count));
|
|
|
|
active_list = kcalloc(1 + dod->package.count,
|
|
sizeof(struct acpi_video_enumerated_device),
|
|
GFP_KERNEL);
|
|
if (!active_list) {
|
|
status = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
count = 0;
|
|
for (i = 0; i < dod->package.count; i++) {
|
|
obj = &dod->package.elements[i];
|
|
|
|
if (obj->type != ACPI_TYPE_INTEGER) {
|
|
printk(KERN_ERR PREFIX
|
|
"Invalid _DOD data in element %d\n", i);
|
|
continue;
|
|
}
|
|
|
|
active_list[count].value.int_val = obj->integer.value;
|
|
active_list[count].bind_info = NULL;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
|
|
(int)obj->integer.value));
|
|
count++;
|
|
}
|
|
|
|
kfree(video->attached_array);
|
|
|
|
video->attached_array = active_list;
|
|
video->attached_count = count;
|
|
|
|
out:
|
|
kfree(buffer.pointer);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
acpi_video_get_next_level(struct acpi_video_device *device,
|
|
u32 level_current, u32 event)
|
|
{
|
|
int min, max, min_above, max_below, i, l, delta = 255;
|
|
max = max_below = 0;
|
|
min = min_above = 255;
|
|
/* Find closest level to level_current */
|
|
for (i = 2; i < device->brightness->count; i++) {
|
|
l = device->brightness->levels[i];
|
|
if (abs(l - level_current) < abs(delta)) {
|
|
delta = l - level_current;
|
|
if (!delta)
|
|
break;
|
|
}
|
|
}
|
|
/* Ajust level_current to closest available level */
|
|
level_current += delta;
|
|
for (i = 2; i < device->brightness->count; i++) {
|
|
l = device->brightness->levels[i];
|
|
if (l < min)
|
|
min = l;
|
|
if (l > max)
|
|
max = l;
|
|
if (l < min_above && l > level_current)
|
|
min_above = l;
|
|
if (l > max_below && l < level_current)
|
|
max_below = l;
|
|
}
|
|
|
|
switch (event) {
|
|
case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
|
|
return (level_current < max) ? min_above : min;
|
|
case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
|
|
return (level_current < max) ? min_above : max;
|
|
case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
|
|
return (level_current > min) ? max_below : min;
|
|
case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
|
|
case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
|
|
return 0;
|
|
default:
|
|
return level_current;
|
|
}
|
|
}
|
|
|
|
static void
|
|
acpi_video_switch_brightness(struct work_struct *work)
|
|
{
|
|
struct acpi_video_device *device = container_of(to_delayed_work(work),
|
|
struct acpi_video_device, switch_brightness_work);
|
|
unsigned long long level_current, level_next;
|
|
int event = device->switch_brightness_event;
|
|
int result = -EINVAL;
|
|
|
|
/* no warning message if acpi_backlight=vendor or a quirk is used */
|
|
if (!acpi_video_verify_backlight_support())
|
|
return;
|
|
|
|
if (!device->brightness)
|
|
goto out;
|
|
|
|
result = acpi_video_device_lcd_get_level_current(device,
|
|
&level_current,
|
|
false);
|
|
if (result)
|
|
goto out;
|
|
|
|
level_next = acpi_video_get_next_level(device, level_current, event);
|
|
|
|
result = acpi_video_device_lcd_set_level(device, level_next);
|
|
|
|
if (!result)
|
|
backlight_force_update(device->backlight,
|
|
BACKLIGHT_UPDATE_HOTKEY);
|
|
|
|
out:
|
|
if (result)
|
|
printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
|
|
}
|
|
|
|
int acpi_video_get_edid(struct acpi_device *device, int type, int device_id,
|
|
void **edid)
|
|
{
|
|
struct acpi_video_bus *video;
|
|
struct acpi_video_device *video_device;
|
|
union acpi_object *buffer = NULL;
|
|
acpi_status status;
|
|
int i, length;
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
video = acpi_driver_data(device);
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
video_device = video->attached_array[i].bind_info;
|
|
length = 256;
|
|
|
|
if (!video_device)
|
|
continue;
|
|
|
|
if (!video_device->cap._DDC)
|
|
continue;
|
|
|
|
if (type) {
|
|
switch (type) {
|
|
case ACPI_VIDEO_DISPLAY_CRT:
|
|
if (!video_device->flags.crt)
|
|
continue;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_TV:
|
|
if (!video_device->flags.tvout)
|
|
continue;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_DVI:
|
|
if (!video_device->flags.dvi)
|
|
continue;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_LCD:
|
|
if (!video_device->flags.lcd)
|
|
continue;
|
|
break;
|
|
}
|
|
} else if (video_device->device_id != device_id) {
|
|
continue;
|
|
}
|
|
|
|
status = acpi_video_device_EDID(video_device, &buffer, length);
|
|
|
|
if (ACPI_FAILURE(status) || !buffer ||
|
|
buffer->type != ACPI_TYPE_BUFFER) {
|
|
length = 128;
|
|
status = acpi_video_device_EDID(video_device, &buffer,
|
|
length);
|
|
if (ACPI_FAILURE(status) || !buffer ||
|
|
buffer->type != ACPI_TYPE_BUFFER) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
*edid = buffer->buffer.pointer;
|
|
return length;
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
EXPORT_SYMBOL(acpi_video_get_edid);
|
|
|
|
static int
|
|
acpi_video_bus_get_devices(struct acpi_video_bus *video,
|
|
struct acpi_device *device)
|
|
{
|
|
int status = 0;
|
|
struct acpi_device *dev;
|
|
|
|
/*
|
|
* There are systems where video module known to work fine regardless
|
|
* of broken _DOD and ignoring returned value here doesn't cause
|
|
* any issues later.
|
|
*/
|
|
acpi_video_device_enumerate(video);
|
|
|
|
list_for_each_entry(dev, &device->children, node) {
|
|
|
|
status = acpi_video_bus_get_one_device(dev, video);
|
|
if (status) {
|
|
dev_err(&dev->dev, "Can't attach device\n");
|
|
break;
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
/* acpi_video interface */
|
|
|
|
/*
|
|
* Win8 requires setting bit2 of _DOS to let firmware know it shouldn't
|
|
* preform any automatic brightness change on receiving a notification.
|
|
*/
|
|
static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
|
|
{
|
|
return acpi_video_bus_DOS(video, 0,
|
|
acpi_osi_is_win8() ? 1 : 0);
|
|
}
|
|
|
|
static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
|
|
{
|
|
return acpi_video_bus_DOS(video, 0,
|
|
acpi_osi_is_win8() ? 0 : 1);
|
|
}
|
|
|
|
static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
struct acpi_video_bus *video = acpi_driver_data(device);
|
|
struct input_dev *input;
|
|
int keycode = 0;
|
|
|
|
if (!video || !video->input)
|
|
return;
|
|
|
|
input = video->input;
|
|
|
|
switch (event) {
|
|
case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
|
|
* most likely via hotkey. */
|
|
keycode = KEY_SWITCHVIDEOMODE;
|
|
break;
|
|
|
|
case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
|
|
* connector. */
|
|
acpi_video_device_enumerate(video);
|
|
acpi_video_device_rebind(video);
|
|
keycode = KEY_SWITCHVIDEOMODE;
|
|
break;
|
|
|
|
case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
|
|
keycode = KEY_SWITCHVIDEOMODE;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
|
|
keycode = KEY_VIDEO_NEXT;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
|
|
keycode = KEY_VIDEO_PREV;
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Unsupported event [0x%x]\n", event));
|
|
break;
|
|
}
|
|
|
|
if (acpi_notifier_call_chain(device, event, 0))
|
|
/* Something vetoed the keypress. */
|
|
keycode = 0;
|
|
|
|
if (keycode) {
|
|
input_report_key(input, keycode, 1);
|
|
input_sync(input);
|
|
input_report_key(input, keycode, 0);
|
|
input_sync(input);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static void brightness_switch_event(struct acpi_video_device *video_device,
|
|
u32 event)
|
|
{
|
|
if (!brightness_switch_enabled)
|
|
return;
|
|
|
|
video_device->switch_brightness_event = event;
|
|
schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10);
|
|
}
|
|
|
|
static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
|
|
{
|
|
struct acpi_video_device *video_device = data;
|
|
struct acpi_device *device = NULL;
|
|
struct acpi_video_bus *bus;
|
|
struct input_dev *input;
|
|
int keycode = 0;
|
|
|
|
if (!video_device)
|
|
return;
|
|
|
|
device = video_device->dev;
|
|
bus = video_device->video;
|
|
input = bus->input;
|
|
|
|
switch (event) {
|
|
case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
|
|
brightness_switch_event(video_device, event);
|
|
keycode = KEY_BRIGHTNESS_CYCLE;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
|
|
brightness_switch_event(video_device, event);
|
|
keycode = KEY_BRIGHTNESSUP;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
|
|
brightness_switch_event(video_device, event);
|
|
keycode = KEY_BRIGHTNESSDOWN;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */
|
|
brightness_switch_event(video_device, event);
|
|
keycode = KEY_BRIGHTNESS_ZERO;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
|
|
brightness_switch_event(video_device, event);
|
|
keycode = KEY_DISPLAY_OFF;
|
|
break;
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Unsupported event [0x%x]\n", event));
|
|
break;
|
|
}
|
|
|
|
acpi_notifier_call_chain(device, event, 0);
|
|
|
|
if (keycode) {
|
|
input_report_key(input, keycode, 1);
|
|
input_sync(input);
|
|
input_report_key(input, keycode, 0);
|
|
input_sync(input);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int acpi_video_resume(struct notifier_block *nb,
|
|
unsigned long val, void *ign)
|
|
{
|
|
struct acpi_video_bus *video;
|
|
struct acpi_video_device *video_device;
|
|
int i;
|
|
|
|
switch (val) {
|
|
case PM_HIBERNATION_PREPARE:
|
|
case PM_SUSPEND_PREPARE:
|
|
case PM_RESTORE_PREPARE:
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
video = container_of(nb, struct acpi_video_bus, pm_nb);
|
|
|
|
dev_info(&video->device->dev, "Restoring backlight state\n");
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
video_device = video->attached_array[i].bind_info;
|
|
if (video_device && video_device->backlight)
|
|
acpi_video_set_brightness(video_device->backlight);
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static acpi_status
|
|
acpi_video_bus_match(acpi_handle handle, u32 level, void *context,
|
|
void **return_value)
|
|
{
|
|
struct acpi_device *device = context;
|
|
struct acpi_device *sibling;
|
|
int result;
|
|
|
|
if (handle == device->handle)
|
|
return AE_CTRL_TERMINATE;
|
|
|
|
result = acpi_bus_get_device(handle, &sibling);
|
|
if (result)
|
|
return AE_OK;
|
|
|
|
if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME))
|
|
return AE_ALREADY_EXISTS;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static void acpi_video_dev_register_backlight(struct acpi_video_device *device)
|
|
{
|
|
struct backlight_properties props;
|
|
struct pci_dev *pdev;
|
|
acpi_handle acpi_parent;
|
|
struct device *parent = NULL;
|
|
int result;
|
|
static int count;
|
|
char *name;
|
|
|
|
result = acpi_video_init_brightness(device);
|
|
if (result)
|
|
return;
|
|
name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
|
|
if (!name)
|
|
return;
|
|
count++;
|
|
|
|
acpi_get_parent(device->dev->handle, &acpi_parent);
|
|
|
|
pdev = acpi_get_pci_dev(acpi_parent);
|
|
if (pdev) {
|
|
parent = &pdev->dev;
|
|
pci_dev_put(pdev);
|
|
}
|
|
|
|
memset(&props, 0, sizeof(struct backlight_properties));
|
|
props.type = BACKLIGHT_FIRMWARE;
|
|
props.max_brightness = device->brightness->count - 3;
|
|
device->backlight = backlight_device_register(name,
|
|
parent,
|
|
device,
|
|
&acpi_backlight_ops,
|
|
&props);
|
|
kfree(name);
|
|
if (IS_ERR(device->backlight))
|
|
return;
|
|
|
|
/*
|
|
* Save current brightness level in case we have to restore it
|
|
* before acpi_video_device_lcd_set_level() is called next time.
|
|
*/
|
|
device->backlight->props.brightness =
|
|
acpi_video_get_brightness(device->backlight);
|
|
|
|
device->cooling_dev = thermal_cooling_device_register("LCD",
|
|
device->dev, &video_cooling_ops);
|
|
if (IS_ERR(device->cooling_dev)) {
|
|
/*
|
|
* Set cooling_dev to NULL so we don't crash trying to free it.
|
|
* Also, why the hell we are returning early and not attempt to
|
|
* register video output if cooling device registration failed?
|
|
* -- dtor
|
|
*/
|
|
device->cooling_dev = NULL;
|
|
return;
|
|
}
|
|
|
|
dev_info(&device->dev->dev, "registered as cooling_device%d\n",
|
|
device->cooling_dev->id);
|
|
result = sysfs_create_link(&device->dev->dev.kobj,
|
|
&device->cooling_dev->device.kobj,
|
|
"thermal_cooling");
|
|
if (result)
|
|
printk(KERN_ERR PREFIX "Create sysfs link\n");
|
|
result = sysfs_create_link(&device->cooling_dev->device.kobj,
|
|
&device->dev->dev.kobj, "device");
|
|
if (result)
|
|
printk(KERN_ERR PREFIX "Create sysfs link\n");
|
|
}
|
|
|
|
static int acpi_video_bus_register_backlight(struct acpi_video_bus *video)
|
|
{
|
|
struct acpi_video_device *dev;
|
|
|
|
if (video->backlight_registered)
|
|
return 0;
|
|
|
|
if (!acpi_video_verify_backlight_support())
|
|
return 0;
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
list_for_each_entry(dev, &video->video_device_list, entry)
|
|
acpi_video_dev_register_backlight(dev);
|
|
mutex_unlock(&video->device_list_lock);
|
|
|
|
video->backlight_registered = true;
|
|
|
|
video->pm_nb.notifier_call = acpi_video_resume;
|
|
video->pm_nb.priority = 0;
|
|
return register_pm_notifier(&video->pm_nb);
|
|
}
|
|
|
|
static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device)
|
|
{
|
|
if (device->backlight) {
|
|
backlight_device_unregister(device->backlight);
|
|
device->backlight = NULL;
|
|
}
|
|
if (device->brightness) {
|
|
kfree(device->brightness->levels);
|
|
kfree(device->brightness);
|
|
device->brightness = NULL;
|
|
}
|
|
if (device->cooling_dev) {
|
|
sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling");
|
|
sysfs_remove_link(&device->cooling_dev->device.kobj, "device");
|
|
thermal_cooling_device_unregister(device->cooling_dev);
|
|
device->cooling_dev = NULL;
|
|
}
|
|
}
|
|
|
|
static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video)
|
|
{
|
|
struct acpi_video_device *dev;
|
|
int error;
|
|
|
|
if (!video->backlight_registered)
|
|
return 0;
|
|
|
|
error = unregister_pm_notifier(&video->pm_nb);
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
list_for_each_entry(dev, &video->video_device_list, entry)
|
|
acpi_video_dev_unregister_backlight(dev);
|
|
mutex_unlock(&video->device_list_lock);
|
|
|
|
video->backlight_registered = false;
|
|
|
|
return error;
|
|
}
|
|
|
|
static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_device *adev = device->dev;
|
|
|
|
status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,
|
|
acpi_video_device_notify, device);
|
|
if (ACPI_FAILURE(status))
|
|
dev_err(&adev->dev, "Error installing notify handler\n");
|
|
else
|
|
device->flags.notify = 1;
|
|
}
|
|
|
|
static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video)
|
|
{
|
|
struct input_dev *input;
|
|
struct acpi_video_device *dev;
|
|
int error;
|
|
|
|
video->input = input = input_allocate_device();
|
|
if (!input) {
|
|
error = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
error = acpi_video_bus_start_devices(video);
|
|
if (error)
|
|
goto err_free_input;
|
|
|
|
snprintf(video->phys, sizeof(video->phys),
|
|
"%s/video/input0", acpi_device_hid(video->device));
|
|
|
|
input->name = acpi_device_name(video->device);
|
|
input->phys = video->phys;
|
|
input->id.bustype = BUS_HOST;
|
|
input->id.product = 0x06;
|
|
input->dev.parent = &video->device->dev;
|
|
input->evbit[0] = BIT(EV_KEY);
|
|
set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
|
|
set_bit(KEY_VIDEO_NEXT, input->keybit);
|
|
set_bit(KEY_VIDEO_PREV, input->keybit);
|
|
set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
|
|
set_bit(KEY_BRIGHTNESSUP, input->keybit);
|
|
set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
|
|
set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
|
|
set_bit(KEY_DISPLAY_OFF, input->keybit);
|
|
|
|
error = input_register_device(input);
|
|
if (error)
|
|
goto err_stop_dev;
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
list_for_each_entry(dev, &video->video_device_list, entry)
|
|
acpi_video_dev_add_notify_handler(dev);
|
|
mutex_unlock(&video->device_list_lock);
|
|
|
|
return 0;
|
|
|
|
err_stop_dev:
|
|
acpi_video_bus_stop_devices(video);
|
|
err_free_input:
|
|
input_free_device(input);
|
|
video->input = NULL;
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev)
|
|
{
|
|
if (dev->flags.notify) {
|
|
acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY,
|
|
acpi_video_device_notify);
|
|
dev->flags.notify = 0;
|
|
}
|
|
}
|
|
|
|
static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video)
|
|
{
|
|
struct acpi_video_device *dev;
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
list_for_each_entry(dev, &video->video_device_list, entry)
|
|
acpi_video_dev_remove_notify_handler(dev);
|
|
mutex_unlock(&video->device_list_lock);
|
|
|
|
acpi_video_bus_stop_devices(video);
|
|
input_unregister_device(video->input);
|
|
video->input = NULL;
|
|
}
|
|
|
|
static int acpi_video_backlight_notify(struct notifier_block *nb,
|
|
unsigned long val, void *bd)
|
|
{
|
|
struct backlight_device *backlight = bd;
|
|
struct acpi_video_bus *video;
|
|
|
|
/* acpi_video_verify_backlight_support only cares about raw devices */
|
|
if (backlight->props.type != BACKLIGHT_RAW)
|
|
return NOTIFY_DONE;
|
|
|
|
video = container_of(nb, struct acpi_video_bus, backlight_nb);
|
|
|
|
switch (val) {
|
|
case BACKLIGHT_REGISTERED:
|
|
if (!acpi_video_verify_backlight_support())
|
|
acpi_video_bus_unregister_backlight(video);
|
|
break;
|
|
case BACKLIGHT_UNREGISTERED:
|
|
acpi_video_bus_register_backlight(video);
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int acpi_video_bus_add_backlight_notify_handler(
|
|
struct acpi_video_bus *video)
|
|
{
|
|
int error;
|
|
|
|
video->backlight_nb.notifier_call = acpi_video_backlight_notify;
|
|
video->backlight_nb.priority = 0;
|
|
error = backlight_register_notifier(&video->backlight_nb);
|
|
if (error == 0)
|
|
video->backlight_notifier_registered = true;
|
|
|
|
return error;
|
|
}
|
|
|
|
static int acpi_video_bus_remove_backlight_notify_handler(
|
|
struct acpi_video_bus *video)
|
|
{
|
|
if (!video->backlight_notifier_registered)
|
|
return 0;
|
|
|
|
video->backlight_notifier_registered = false;
|
|
|
|
return backlight_unregister_notifier(&video->backlight_nb);
|
|
}
|
|
|
|
static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
|
|
{
|
|
struct acpi_video_device *dev, *next;
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
|
|
list_del(&dev->entry);
|
|
kfree(dev);
|
|
}
|
|
mutex_unlock(&video->device_list_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int instance;
|
|
|
|
static int acpi_video_bus_add(struct acpi_device *device)
|
|
{
|
|
struct acpi_video_bus *video;
|
|
int error;
|
|
acpi_status status;
|
|
|
|
status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
|
|
device->parent->handle, 1,
|
|
acpi_video_bus_match, NULL,
|
|
device, NULL);
|
|
if (status == AE_ALREADY_EXISTS) {
|
|
printk(KERN_WARNING FW_BUG
|
|
"Duplicate ACPI video bus devices for the"
|
|
" same VGA controller, please try module "
|
|
"parameter \"video.allow_duplicates=1\""
|
|
"if the current driver doesn't work.\n");
|
|
if (!allow_duplicates)
|
|
return -ENODEV;
|
|
}
|
|
|
|
video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
|
|
if (!video)
|
|
return -ENOMEM;
|
|
|
|
/* a hack to fix the duplicate name "VID" problem on T61 */
|
|
if (!strcmp(device->pnp.bus_id, "VID")) {
|
|
if (instance)
|
|
device->pnp.bus_id[3] = '0' + instance;
|
|
instance++;
|
|
}
|
|
/* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
|
|
if (!strcmp(device->pnp.bus_id, "VGA")) {
|
|
if (instance)
|
|
device->pnp.bus_id[3] = '0' + instance;
|
|
instance++;
|
|
}
|
|
|
|
video->device = device;
|
|
strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
|
|
device->driver_data = video;
|
|
|
|
acpi_video_bus_find_cap(video);
|
|
error = acpi_video_bus_check(video);
|
|
if (error)
|
|
goto err_free_video;
|
|
|
|
mutex_init(&video->device_list_lock);
|
|
INIT_LIST_HEAD(&video->video_device_list);
|
|
|
|
error = acpi_video_bus_get_devices(video, device);
|
|
if (error)
|
|
goto err_put_video;
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
|
|
ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
|
|
video->flags.multihead ? "yes" : "no",
|
|
video->flags.rom ? "yes" : "no",
|
|
video->flags.post ? "yes" : "no");
|
|
mutex_lock(&video_list_lock);
|
|
list_add_tail(&video->entry, &video_bus_head);
|
|
mutex_unlock(&video_list_lock);
|
|
|
|
acpi_video_bus_register_backlight(video);
|
|
acpi_video_bus_add_notify_handler(video);
|
|
acpi_video_bus_add_backlight_notify_handler(video);
|
|
|
|
return 0;
|
|
|
|
err_put_video:
|
|
acpi_video_bus_put_devices(video);
|
|
kfree(video->attached_array);
|
|
err_free_video:
|
|
kfree(video);
|
|
device->driver_data = NULL;
|
|
|
|
return error;
|
|
}
|
|
|
|
static int acpi_video_bus_remove(struct acpi_device *device)
|
|
{
|
|
struct acpi_video_bus *video = NULL;
|
|
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
video = acpi_driver_data(device);
|
|
|
|
acpi_video_bus_remove_backlight_notify_handler(video);
|
|
acpi_video_bus_remove_notify_handler(video);
|
|
acpi_video_bus_unregister_backlight(video);
|
|
acpi_video_bus_put_devices(video);
|
|
|
|
mutex_lock(&video_list_lock);
|
|
list_del(&video->entry);
|
|
mutex_unlock(&video_list_lock);
|
|
|
|
kfree(video->attached_array);
|
|
kfree(video);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init is_i740(struct pci_dev *dev)
|
|
{
|
|
if (dev->device == 0x00D1)
|
|
return 1;
|
|
if (dev->device == 0x7000)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int __init intel_opregion_present(void)
|
|
{
|
|
int opregion = 0;
|
|
struct pci_dev *dev = NULL;
|
|
u32 address;
|
|
|
|
for_each_pci_dev(dev) {
|
|
if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
|
|
continue;
|
|
if (dev->vendor != PCI_VENDOR_ID_INTEL)
|
|
continue;
|
|
/* We don't want to poke around undefined i740 registers */
|
|
if (is_i740(dev))
|
|
continue;
|
|
pci_read_config_dword(dev, 0xfc, &address);
|
|
if (!address)
|
|
continue;
|
|
opregion = 1;
|
|
}
|
|
return opregion;
|
|
}
|
|
|
|
int acpi_video_register(void)
|
|
{
|
|
int result = 0;
|
|
if (register_count) {
|
|
/*
|
|
* if the function of acpi_video_register is already called,
|
|
* don't register the acpi_vide_bus again and return no error.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
mutex_init(&video_list_lock);
|
|
INIT_LIST_HEAD(&video_bus_head);
|
|
|
|
result = acpi_bus_register_driver(&acpi_video_bus);
|
|
if (result < 0)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* When the acpi_video_bus is loaded successfully, increase
|
|
* the counter reference.
|
|
*/
|
|
register_count = 1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(acpi_video_register);
|
|
|
|
void acpi_video_unregister(void)
|
|
{
|
|
if (!register_count) {
|
|
/*
|
|
* If the acpi video bus is already unloaded, don't
|
|
* unload it again and return directly.
|
|
*/
|
|
return;
|
|
}
|
|
acpi_bus_unregister_driver(&acpi_video_bus);
|
|
|
|
register_count = 0;
|
|
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(acpi_video_unregister);
|
|
|
|
void acpi_video_unregister_backlight(void)
|
|
{
|
|
struct acpi_video_bus *video;
|
|
|
|
if (!register_count)
|
|
return;
|
|
|
|
mutex_lock(&video_list_lock);
|
|
list_for_each_entry(video, &video_bus_head, entry)
|
|
acpi_video_bus_unregister_backlight(video);
|
|
mutex_unlock(&video_list_lock);
|
|
}
|
|
EXPORT_SYMBOL(acpi_video_unregister_backlight);
|
|
|
|
/*
|
|
* This is kind of nasty. Hardware using Intel chipsets may require
|
|
* the video opregion code to be run first in order to initialise
|
|
* state before any ACPI video calls are made. To handle this we defer
|
|
* registration of the video class until the opregion code has run.
|
|
*/
|
|
|
|
static int __init acpi_video_init(void)
|
|
{
|
|
dmi_check_system(video_dmi_table);
|
|
|
|
if (intel_opregion_present())
|
|
return 0;
|
|
|
|
return acpi_video_register();
|
|
}
|
|
|
|
static void __exit acpi_video_exit(void)
|
|
{
|
|
acpi_video_unregister();
|
|
|
|
return;
|
|
}
|
|
|
|
module_init(acpi_video_init);
|
|
module_exit(acpi_video_exit);
|