mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 02:56:44 +07:00
129ff8f8d5
Or else the laptop will boot with a dimmed screen. References: https://bugzilla.kernel.org/show_bug.cgi?id=51141 Tested-by: Stefan Nagy <public@stefan-nagy.at> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1864 lines
47 KiB
C
1864 lines
47 KiB
C
/*
|
|
* video.c - ACPI Video Driver ($Revision:$)
|
|
*
|
|
* Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
|
|
* Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
|
|
* Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/list.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/input.h>
|
|
#include <linux/backlight.h>
|
|
#include <linux/thermal.h>
|
|
#include <linux/sort.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/pci_ids.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/uaccess.h>
|
|
#include <linux/dmi.h>
|
|
#include <acpi/acpi_bus.h>
|
|
#include <acpi/acpi_drivers.h>
|
|
#include <linux/suspend.h>
|
|
#include <acpi/video.h>
|
|
|
|
#define PREFIX "ACPI: "
|
|
|
|
#define ACPI_VIDEO_BUS_NAME "Video Bus"
|
|
#define ACPI_VIDEO_DEVICE_NAME "Video Device"
|
|
#define ACPI_VIDEO_NOTIFY_SWITCH 0x80
|
|
#define ACPI_VIDEO_NOTIFY_PROBE 0x81
|
|
#define ACPI_VIDEO_NOTIFY_CYCLE 0x82
|
|
#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
|
|
#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
|
|
|
|
#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
|
|
#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
|
|
#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
|
|
#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
|
|
#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
|
|
|
|
#define MAX_NAME_LEN 20
|
|
|
|
#define _COMPONENT ACPI_VIDEO_COMPONENT
|
|
ACPI_MODULE_NAME("video");
|
|
|
|
MODULE_AUTHOR("Bruno Ducrot");
|
|
MODULE_DESCRIPTION("ACPI Video Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static bool brightness_switch_enabled = 1;
|
|
module_param(brightness_switch_enabled, bool, 0644);
|
|
|
|
/*
|
|
* By default, we don't allow duplicate ACPI video bus devices
|
|
* under the same VGA controller
|
|
*/
|
|
static bool allow_duplicates;
|
|
module_param(allow_duplicates, bool, 0644);
|
|
|
|
/*
|
|
* Some BIOSes claim they use minimum backlight at boot,
|
|
* and this may bring dimming screen after boot
|
|
*/
|
|
static bool use_bios_initial_backlight = 1;
|
|
module_param(use_bios_initial_backlight, bool, 0644);
|
|
|
|
static int register_count = 0;
|
|
static int acpi_video_bus_add(struct acpi_device *device);
|
|
static int acpi_video_bus_remove(struct acpi_device *device, int type);
|
|
static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
|
|
|
|
static const struct acpi_device_id video_device_ids[] = {
|
|
{ACPI_VIDEO_HID, 0},
|
|
{"", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, video_device_ids);
|
|
|
|
static struct acpi_driver acpi_video_bus = {
|
|
.name = "video",
|
|
.class = ACPI_VIDEO_CLASS,
|
|
.ids = video_device_ids,
|
|
.ops = {
|
|
.add = acpi_video_bus_add,
|
|
.remove = acpi_video_bus_remove,
|
|
.notify = acpi_video_bus_notify,
|
|
},
|
|
};
|
|
|
|
struct acpi_video_bus_flags {
|
|
u8 multihead:1; /* can switch video heads */
|
|
u8 rom:1; /* can retrieve a video rom */
|
|
u8 post:1; /* can configure the head to */
|
|
u8 reserved:5;
|
|
};
|
|
|
|
struct acpi_video_bus_cap {
|
|
u8 _DOS:1; /*Enable/Disable output switching */
|
|
u8 _DOD:1; /*Enumerate all devices attached to display adapter */
|
|
u8 _ROM:1; /*Get ROM Data */
|
|
u8 _GPD:1; /*Get POST Device */
|
|
u8 _SPD:1; /*Set POST Device */
|
|
u8 _VPO:1; /*Video POST Options */
|
|
u8 reserved:2;
|
|
};
|
|
|
|
struct acpi_video_device_attrib {
|
|
u32 display_index:4; /* A zero-based instance of the Display */
|
|
u32 display_port_attachment:4; /*This field differentiates the display type */
|
|
u32 display_type:4; /*Describe the specific type in use */
|
|
u32 vendor_specific:4; /*Chipset Vendor Specific */
|
|
u32 bios_can_detect:1; /*BIOS can detect the device */
|
|
u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
|
|
the VGA device. */
|
|
u32 pipe_id:3; /*For VGA multiple-head devices. */
|
|
u32 reserved:10; /*Must be 0 */
|
|
u32 device_id_scheme:1; /*Device ID Scheme */
|
|
};
|
|
|
|
struct acpi_video_enumerated_device {
|
|
union {
|
|
u32 int_val;
|
|
struct acpi_video_device_attrib attrib;
|
|
} value;
|
|
struct acpi_video_device *bind_info;
|
|
};
|
|
|
|
struct acpi_video_bus {
|
|
struct acpi_device *device;
|
|
u8 dos_setting;
|
|
struct acpi_video_enumerated_device *attached_array;
|
|
u8 attached_count;
|
|
struct acpi_video_bus_cap cap;
|
|
struct acpi_video_bus_flags flags;
|
|
struct list_head video_device_list;
|
|
struct mutex device_list_lock; /* protects video_device_list */
|
|
struct input_dev *input;
|
|
char phys[32]; /* for input device */
|
|
struct notifier_block pm_nb;
|
|
};
|
|
|
|
struct acpi_video_device_flags {
|
|
u8 crt:1;
|
|
u8 lcd:1;
|
|
u8 tvout:1;
|
|
u8 dvi:1;
|
|
u8 bios:1;
|
|
u8 unknown:1;
|
|
u8 reserved:2;
|
|
};
|
|
|
|
struct acpi_video_device_cap {
|
|
u8 _ADR:1; /*Return the unique ID */
|
|
u8 _BCL:1; /*Query list of brightness control levels supported */
|
|
u8 _BCM:1; /*Set the brightness level */
|
|
u8 _BQC:1; /* Get current brightness level */
|
|
u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
|
|
u8 _DDC:1; /*Return the EDID for this device */
|
|
};
|
|
|
|
struct acpi_video_brightness_flags {
|
|
u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
|
|
u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
|
|
u8 _BCL_use_index:1; /* levels in _BCL are index values */
|
|
u8 _BCM_use_index:1; /* input of _BCM is an index value */
|
|
u8 _BQC_use_index:1; /* _BQC returns an index value */
|
|
};
|
|
|
|
struct acpi_video_device_brightness {
|
|
int curr;
|
|
int count;
|
|
int *levels;
|
|
struct acpi_video_brightness_flags flags;
|
|
};
|
|
|
|
struct acpi_video_device {
|
|
unsigned long device_id;
|
|
struct acpi_video_device_flags flags;
|
|
struct acpi_video_device_cap cap;
|
|
struct list_head entry;
|
|
struct acpi_video_bus *video;
|
|
struct acpi_device *dev;
|
|
struct acpi_video_device_brightness *brightness;
|
|
struct backlight_device *backlight;
|
|
struct thermal_cooling_device *cooling_dev;
|
|
};
|
|
|
|
static const char device_decode[][30] = {
|
|
"motherboard VGA device",
|
|
"PCI VGA device",
|
|
"AGP VGA device",
|
|
"UNKNOWN",
|
|
};
|
|
|
|
static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
|
|
static void acpi_video_device_rebind(struct acpi_video_bus *video);
|
|
static void acpi_video_device_bind(struct acpi_video_bus *video,
|
|
struct acpi_video_device *device);
|
|
static int acpi_video_device_enumerate(struct acpi_video_bus *video);
|
|
static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
|
|
int level);
|
|
static int acpi_video_device_lcd_get_level_current(
|
|
struct acpi_video_device *device,
|
|
unsigned long long *level, int init);
|
|
static int acpi_video_get_next_level(struct acpi_video_device *device,
|
|
u32 level_current, u32 event);
|
|
static int acpi_video_switch_brightness(struct acpi_video_device *device,
|
|
int event);
|
|
|
|
/*backlight device sysfs support*/
|
|
static int acpi_video_get_brightness(struct backlight_device *bd)
|
|
{
|
|
unsigned long long cur_level;
|
|
int i;
|
|
struct acpi_video_device *vd =
|
|
(struct acpi_video_device *)bl_get_data(bd);
|
|
|
|
if (acpi_video_device_lcd_get_level_current(vd, &cur_level, 0))
|
|
return -EINVAL;
|
|
for (i = 2; i < vd->brightness->count; i++) {
|
|
if (vd->brightness->levels[i] == cur_level)
|
|
/* The first two entries are special - see page 575
|
|
of the ACPI spec 3.0 */
|
|
return i-2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_video_set_brightness(struct backlight_device *bd)
|
|
{
|
|
int request_level = bd->props.brightness + 2;
|
|
struct acpi_video_device *vd =
|
|
(struct acpi_video_device *)bl_get_data(bd);
|
|
|
|
return acpi_video_device_lcd_set_level(vd,
|
|
vd->brightness->levels[request_level]);
|
|
}
|
|
|
|
static const struct backlight_ops acpi_backlight_ops = {
|
|
.get_brightness = acpi_video_get_brightness,
|
|
.update_status = acpi_video_set_brightness,
|
|
};
|
|
|
|
/* thermal cooling device callbacks */
|
|
static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned
|
|
long *state)
|
|
{
|
|
struct acpi_device *device = cooling_dev->devdata;
|
|
struct acpi_video_device *video = acpi_driver_data(device);
|
|
|
|
*state = video->brightness->count - 3;
|
|
return 0;
|
|
}
|
|
|
|
static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned
|
|
long *state)
|
|
{
|
|
struct acpi_device *device = cooling_dev->devdata;
|
|
struct acpi_video_device *video = acpi_driver_data(device);
|
|
unsigned long long level;
|
|
int offset;
|
|
|
|
if (acpi_video_device_lcd_get_level_current(video, &level, 0))
|
|
return -EINVAL;
|
|
for (offset = 2; offset < video->brightness->count; offset++)
|
|
if (level == video->brightness->levels[offset]) {
|
|
*state = video->brightness->count - offset - 1;
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int
|
|
video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state)
|
|
{
|
|
struct acpi_device *device = cooling_dev->devdata;
|
|
struct acpi_video_device *video = acpi_driver_data(device);
|
|
int level;
|
|
|
|
if ( state >= video->brightness->count - 2)
|
|
return -EINVAL;
|
|
|
|
state = video->brightness->count - state;
|
|
level = video->brightness->levels[state -1];
|
|
return acpi_video_device_lcd_set_level(video, level);
|
|
}
|
|
|
|
static const struct thermal_cooling_device_ops video_cooling_ops = {
|
|
.get_max_state = video_get_max_state,
|
|
.get_cur_state = video_get_cur_state,
|
|
.set_cur_state = video_set_cur_state,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Video Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
|
|
union acpi_object **levels)
|
|
{
|
|
int status;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *obj;
|
|
|
|
|
|
*levels = NULL;
|
|
|
|
status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
|
|
if (!ACPI_SUCCESS(status))
|
|
return status;
|
|
obj = (union acpi_object *)buffer.pointer;
|
|
if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
|
|
printk(KERN_ERR PREFIX "Invalid _BCL data\n");
|
|
status = -EFAULT;
|
|
goto err;
|
|
}
|
|
|
|
*levels = obj;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
kfree(buffer.pointer);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
|
|
{
|
|
int status;
|
|
union acpi_object arg0 = { ACPI_TYPE_INTEGER };
|
|
struct acpi_object_list args = { 1, &arg0 };
|
|
int state;
|
|
|
|
arg0.integer.value = level;
|
|
|
|
status = acpi_evaluate_object(device->dev->handle, "_BCM",
|
|
&args, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
|
|
return -EIO;
|
|
}
|
|
|
|
device->brightness->curr = level;
|
|
for (state = 2; state < device->brightness->count; state++)
|
|
if (level == device->brightness->levels[state]) {
|
|
if (device->backlight)
|
|
device->backlight->props.brightness = state - 2;
|
|
return 0;
|
|
}
|
|
|
|
ACPI_ERROR((AE_INFO, "Current brightness invalid"));
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* For some buggy _BQC methods, we need to add a constant value to
|
|
* the _BQC return value to get the actual current brightness level
|
|
*/
|
|
|
|
static int bqc_offset_aml_bug_workaround;
|
|
static int __init video_set_bqc_offset(const struct dmi_system_id *d)
|
|
{
|
|
bqc_offset_aml_bug_workaround = 9;
|
|
return 0;
|
|
}
|
|
|
|
static int video_ignore_initial_backlight(const struct dmi_system_id *d)
|
|
{
|
|
use_bios_initial_backlight = 0;
|
|
return 0;
|
|
}
|
|
|
|
static struct dmi_system_id video_dmi_table[] __initdata = {
|
|
/*
|
|
* Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
|
|
*/
|
|
{
|
|
.callback = video_set_bqc_offset,
|
|
.ident = "Acer Aspire 5720",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_bqc_offset,
|
|
.ident = "Acer Aspire 5710Z",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_bqc_offset,
|
|
.ident = "eMachines E510",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_bqc_offset,
|
|
.ident = "Acer Aspire 5315",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_set_bqc_offset,
|
|
.ident = "Acer Aspire 7720",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_ignore_initial_backlight,
|
|
.ident = "HP Folio 13-2000",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
|
|
static int
|
|
acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
|
|
unsigned long long *level, int init)
|
|
{
|
|
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 (device->brightness->flags._BQC_use_index) {
|
|
if (device->brightness->flags._BCL_reversed)
|
|
*level = device->brightness->count
|
|
- 3 - (*level);
|
|
*level = device->brightness->levels[*level + 2];
|
|
|
|
}
|
|
*level += bqc_offset_aml_bug_workaround;
|
|
for (i = 2; i < device->brightness->count; i++)
|
|
if (device->brightness->levels[i] == *level) {
|
|
device->brightness->curr = *level;
|
|
return 0;
|
|
}
|
|
if (!init) {
|
|
/*
|
|
* BQC returned an invalid level.
|
|
* Stop using it.
|
|
*/
|
|
ACPI_WARNING((AE_INFO,
|
|
"%s returned an invalid level",
|
|
buf));
|
|
device->cap._BQC = device->cap._BCQ = 0;
|
|
}
|
|
} else {
|
|
/* Fixme:
|
|
* should we return an error or ignore this failure?
|
|
* dev->brightness->curr is a cached value which stores
|
|
* the correct current backlight level in most cases.
|
|
* ACPI video backlight still works w/ buggy _BQC.
|
|
* http://bugzilla.kernel.org/show_bug.cgi?id=12233
|
|
*/
|
|
ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
|
|
device->cap._BQC = device->cap._BCQ = 0;
|
|
}
|
|
}
|
|
|
|
*level = device->brightness->curr;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acpi_video_device_EDID(struct acpi_video_device *device,
|
|
union acpi_object **edid, ssize_t length)
|
|
{
|
|
int status;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *obj;
|
|
union acpi_object arg0 = { ACPI_TYPE_INTEGER };
|
|
struct acpi_object_list args = { 1, &arg0 };
|
|
|
|
|
|
*edid = NULL;
|
|
|
|
if (!device)
|
|
return -ENODEV;
|
|
if (length == 128)
|
|
arg0.integer.value = 1;
|
|
else if (length == 256)
|
|
arg0.integer.value = 2;
|
|
else
|
|
return -EINVAL;
|
|
|
|
status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
obj = buffer.pointer;
|
|
|
|
if (obj && obj->type == ACPI_TYPE_BUFFER)
|
|
*edid = obj;
|
|
else {
|
|
printk(KERN_ERR PREFIX "Invalid _DDC data\n");
|
|
status = -EFAULT;
|
|
kfree(obj);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/* bus */
|
|
|
|
/*
|
|
* Arg:
|
|
* video : video bus device pointer
|
|
* bios_flag :
|
|
* 0. The system BIOS should NOT automatically switch(toggle)
|
|
* the active display output.
|
|
* 1. The system BIOS should automatically switch (toggle) the
|
|
* active display output. No switch event.
|
|
* 2. The _DGS value should be locked.
|
|
* 3. The system BIOS should not automatically switch (toggle) the
|
|
* active display output, but instead generate the display switch
|
|
* event notify code.
|
|
* lcd_flag :
|
|
* 0. The system BIOS should automatically control the brightness level
|
|
* of the LCD when the power changes from AC to DC
|
|
* 1. The system BIOS should NOT automatically control the brightness
|
|
* level of the LCD when the power changes from AC to DC.
|
|
* Return Value:
|
|
* -EINVAL wrong arg.
|
|
*/
|
|
|
|
static int
|
|
acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
|
|
{
|
|
acpi_status status;
|
|
union acpi_object arg0 = { ACPI_TYPE_INTEGER };
|
|
struct acpi_object_list args = { 1, &arg0 };
|
|
|
|
if (!video->cap._DOS)
|
|
return 0;
|
|
|
|
if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1)
|
|
return -EINVAL;
|
|
arg0.integer.value = (lcd_flag << 2) | bios_flag;
|
|
video->dos_setting = arg0.integer.value;
|
|
status = acpi_evaluate_object(video->device->handle, "_DOS",
|
|
&args, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Simple comparison function used to sort backlight levels.
|
|
*/
|
|
|
|
static int
|
|
acpi_video_cmp_level(const void *a, const void *b)
|
|
{
|
|
return *(int *)a - *(int *)b;
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* device : video output device (LCD, CRT, ..)
|
|
*
|
|
* Return Value:
|
|
* Maximum brightness level
|
|
*
|
|
* Allocate and initialize device->brightness.
|
|
*/
|
|
|
|
static int
|
|
acpi_video_init_brightness(struct acpi_video_device *device)
|
|
{
|
|
union acpi_object *obj = NULL;
|
|
int i, max_level = 0, count = 0, level_ac_battery = 0;
|
|
unsigned long long level, level_old;
|
|
union acpi_object *o;
|
|
struct acpi_video_device_brightness *br = NULL;
|
|
int result = -EINVAL;
|
|
|
|
if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
|
|
"LCD brightness level\n"));
|
|
goto out;
|
|
}
|
|
|
|
if (obj->package.count < 2)
|
|
goto out;
|
|
|
|
br = kzalloc(sizeof(*br), GFP_KERNEL);
|
|
if (!br) {
|
|
printk(KERN_ERR "can't allocate memory\n");
|
|
result = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
|
|
GFP_KERNEL);
|
|
if (!br->levels) {
|
|
result = -ENOMEM;
|
|
goto out_free;
|
|
}
|
|
|
|
for (i = 0; i < obj->package.count; i++) {
|
|
o = (union acpi_object *)&obj->package.elements[i];
|
|
if (o->type != ACPI_TYPE_INTEGER) {
|
|
printk(KERN_ERR PREFIX "Invalid data\n");
|
|
continue;
|
|
}
|
|
br->levels[count] = (u32) o->integer.value;
|
|
|
|
if (br->levels[count] > max_level)
|
|
max_level = br->levels[count];
|
|
count++;
|
|
}
|
|
|
|
/*
|
|
* some buggy BIOS don't export the levels
|
|
* when machine is on AC/Battery in _BCL package.
|
|
* In this case, the first two elements in _BCL packages
|
|
* are also supported brightness levels that OS should take care of.
|
|
*/
|
|
for (i = 2; i < count; i++) {
|
|
if (br->levels[i] == br->levels[0])
|
|
level_ac_battery++;
|
|
if (br->levels[i] == br->levels[1])
|
|
level_ac_battery++;
|
|
}
|
|
|
|
if (level_ac_battery < 2) {
|
|
level_ac_battery = 2 - level_ac_battery;
|
|
br->flags._BCL_no_ac_battery_levels = 1;
|
|
for (i = (count - 1 + level_ac_battery); i >= 2; i--)
|
|
br->levels[i] = br->levels[i - level_ac_battery];
|
|
count += level_ac_battery;
|
|
} else if (level_ac_battery > 2)
|
|
ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
|
|
|
|
/* Check if the _BCL package is in a reversed order */
|
|
if (max_level == br->levels[2]) {
|
|
br->flags._BCL_reversed = 1;
|
|
sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
|
|
acpi_video_cmp_level, NULL);
|
|
} else if (max_level != br->levels[count - 1])
|
|
ACPI_ERROR((AE_INFO,
|
|
"Found unordered _BCL package\n"));
|
|
|
|
br->count = count;
|
|
device->brightness = br;
|
|
|
|
/* Check the input/output of _BQC/_BCL/_BCM */
|
|
if ((max_level < 100) && (max_level <= (count - 2)))
|
|
br->flags._BCL_use_index = 1;
|
|
|
|
/*
|
|
* _BCM is always consistent with _BCL,
|
|
* at least for all the laptops we have ever seen.
|
|
*/
|
|
br->flags._BCM_use_index = br->flags._BCL_use_index;
|
|
|
|
/* _BQC uses INDEX while _BCL uses VALUE in some laptops */
|
|
br->curr = level = max_level;
|
|
|
|
if (!device->cap._BQC)
|
|
goto set_level;
|
|
|
|
result = acpi_video_device_lcd_get_level_current(device, &level_old, 1);
|
|
if (result)
|
|
goto out_free_levels;
|
|
|
|
/*
|
|
* Set the level to maximum and check if _BQC uses indexed value
|
|
*/
|
|
result = acpi_video_device_lcd_set_level(device, max_level);
|
|
if (result)
|
|
goto out_free_levels;
|
|
|
|
result = acpi_video_device_lcd_get_level_current(device, &level, 0);
|
|
if (result)
|
|
goto out_free_levels;
|
|
|
|
br->flags._BQC_use_index = (level == max_level ? 0 : 1);
|
|
|
|
if (!br->flags._BQC_use_index) {
|
|
/*
|
|
* Set the backlight to the initial state.
|
|
* On some buggy laptops, _BQC returns an uninitialized value
|
|
* when invoked for the first time, i.e. level_old is invalid.
|
|
* set the backlight to max_level in this case
|
|
*/
|
|
if (use_bios_initial_backlight) {
|
|
for (i = 2; i < br->count; i++)
|
|
if (level_old == br->levels[i])
|
|
level = level_old;
|
|
}
|
|
goto set_level;
|
|
}
|
|
|
|
if (br->flags._BCL_reversed)
|
|
level_old = (br->count - 1) - level_old;
|
|
level = br->levels[level_old];
|
|
|
|
set_level:
|
|
result = acpi_video_device_lcd_set_level(device, level);
|
|
if (result)
|
|
goto out_free_levels;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"found %d brightness levels\n", count - 2));
|
|
kfree(obj);
|
|
return result;
|
|
|
|
out_free_levels:
|
|
kfree(br->levels);
|
|
out_free:
|
|
kfree(br);
|
|
out:
|
|
device->brightness = NULL;
|
|
kfree(obj);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* device : video output device (LCD, CRT, ..)
|
|
*
|
|
* Return Value:
|
|
* None
|
|
*
|
|
* Find out all required AML methods defined under the output
|
|
* device.
|
|
*/
|
|
|
|
static void acpi_video_device_find_cap(struct acpi_video_device *device)
|
|
{
|
|
acpi_handle h_dummy1;
|
|
|
|
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
|
|
device->cap._ADR = 1;
|
|
}
|
|
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
|
|
device->cap._BCL = 1;
|
|
}
|
|
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
|
|
device->cap._BCM = 1;
|
|
}
|
|
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
|
|
device->cap._BQC = 1;
|
|
else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
|
|
&h_dummy1))) {
|
|
printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
|
|
device->cap._BCQ = 1;
|
|
}
|
|
|
|
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
|
|
device->cap._DDC = 1;
|
|
}
|
|
|
|
if (acpi_video_backlight_support()) {
|
|
struct backlight_properties props;
|
|
struct pci_dev *pdev;
|
|
acpi_handle acpi_parent;
|
|
struct device *parent = NULL;
|
|
int result;
|
|
static int count = 0;
|
|
char *name;
|
|
|
|
result = acpi_video_init_brightness(device);
|
|
if (result)
|
|
return;
|
|
name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
|
|
if (!name)
|
|
return;
|
|
count++;
|
|
|
|
acpi_get_parent(device->dev->handle, &acpi_parent);
|
|
|
|
pdev = acpi_get_pci_dev(acpi_parent);
|
|
if (pdev) {
|
|
parent = &pdev->dev;
|
|
pci_dev_put(pdev);
|
|
}
|
|
|
|
memset(&props, 0, sizeof(struct backlight_properties));
|
|
props.type = BACKLIGHT_FIRMWARE;
|
|
props.max_brightness = device->brightness->count - 3;
|
|
device->backlight = backlight_device_register(name,
|
|
parent,
|
|
device,
|
|
&acpi_backlight_ops,
|
|
&props);
|
|
kfree(name);
|
|
if (IS_ERR(device->backlight))
|
|
return;
|
|
|
|
/*
|
|
* Save current brightness level in case we have to restore it
|
|
* before acpi_video_device_lcd_set_level() is called next time.
|
|
*/
|
|
device->backlight->props.brightness =
|
|
acpi_video_get_brightness(device->backlight);
|
|
|
|
device->cooling_dev = thermal_cooling_device_register("LCD",
|
|
device->dev, &video_cooling_ops);
|
|
if (IS_ERR(device->cooling_dev)) {
|
|
/*
|
|
* Set cooling_dev to NULL so we don't crash trying to
|
|
* free it.
|
|
* Also, why the hell we are returning early and
|
|
* not attempt to register video output if cooling
|
|
* device registration failed?
|
|
* -- dtor
|
|
*/
|
|
device->cooling_dev = NULL;
|
|
return;
|
|
}
|
|
|
|
dev_info(&device->dev->dev, "registered as cooling_device%d\n",
|
|
device->cooling_dev->id);
|
|
result = sysfs_create_link(&device->dev->dev.kobj,
|
|
&device->cooling_dev->device.kobj,
|
|
"thermal_cooling");
|
|
if (result)
|
|
printk(KERN_ERR PREFIX "Create sysfs link\n");
|
|
result = sysfs_create_link(&device->cooling_dev->device.kobj,
|
|
&device->dev->dev.kobj, "device");
|
|
if (result)
|
|
printk(KERN_ERR PREFIX "Create sysfs link\n");
|
|
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* device : video output device (VGA)
|
|
*
|
|
* Return Value:
|
|
* None
|
|
*
|
|
* Find out all required AML methods defined under the video bus device.
|
|
*/
|
|
|
|
static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
|
|
{
|
|
acpi_handle h_dummy1;
|
|
|
|
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
|
|
video->cap._DOS = 1;
|
|
}
|
|
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
|
|
video->cap._DOD = 1;
|
|
}
|
|
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
|
|
video->cap._ROM = 1;
|
|
}
|
|
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
|
|
video->cap._GPD = 1;
|
|
}
|
|
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
|
|
video->cap._SPD = 1;
|
|
}
|
|
if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
|
|
video->cap._VPO = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check whether the video bus device has required AML method to
|
|
* support the desired features
|
|
*/
|
|
|
|
static int acpi_video_bus_check(struct acpi_video_bus *video)
|
|
{
|
|
acpi_status status = -ENOENT;
|
|
struct pci_dev *dev;
|
|
|
|
if (!video)
|
|
return -EINVAL;
|
|
|
|
dev = acpi_get_pci_dev(video->device->handle);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
pci_dev_put(dev);
|
|
|
|
/* Since there is no HID, CID and so on for VGA driver, we have
|
|
* to check well known required nodes.
|
|
*/
|
|
|
|
/* Does this device support video switching? */
|
|
if (video->cap._DOS || video->cap._DOD) {
|
|
if (!video->cap._DOS) {
|
|
printk(KERN_WARNING FW_BUG
|
|
"ACPI(%s) defines _DOD but not _DOS\n",
|
|
acpi_device_bid(video->device));
|
|
}
|
|
video->flags.multihead = 1;
|
|
status = 0;
|
|
}
|
|
|
|
/* Does this device support retrieving a video ROM? */
|
|
if (video->cap._ROM) {
|
|
video->flags.rom = 1;
|
|
status = 0;
|
|
}
|
|
|
|
/* Does this device support configuring which video device to POST? */
|
|
if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
|
|
video->flags.post = 1;
|
|
status = 0;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
/* device interface */
|
|
static struct acpi_video_device_attrib*
|
|
acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
|
|
{
|
|
struct acpi_video_enumerated_device *ids;
|
|
int i;
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
ids = &video->attached_array[i];
|
|
if ((ids->value.int_val & 0xffff) == device_id)
|
|
return &ids->value.attrib;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
acpi_video_get_device_type(struct acpi_video_bus *video,
|
|
unsigned long device_id)
|
|
{
|
|
struct acpi_video_enumerated_device *ids;
|
|
int i;
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
ids = &video->attached_array[i];
|
|
if ((ids->value.int_val & 0xffff) == device_id)
|
|
return ids->value.int_val;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acpi_video_bus_get_one_device(struct acpi_device *device,
|
|
struct acpi_video_bus *video)
|
|
{
|
|
unsigned long long device_id;
|
|
int status, device_type;
|
|
struct acpi_video_device *data;
|
|
struct acpi_video_device_attrib* attribute;
|
|
|
|
if (!device || !video)
|
|
return -EINVAL;
|
|
|
|
status =
|
|
acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
|
|
if (ACPI_SUCCESS(status)) {
|
|
|
|
data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
|
|
device->driver_data = data;
|
|
|
|
data->device_id = device_id;
|
|
data->video = video;
|
|
data->dev = device;
|
|
|
|
attribute = acpi_video_get_device_attr(video, device_id);
|
|
|
|
if((attribute != NULL) && attribute->device_id_scheme) {
|
|
switch (attribute->display_type) {
|
|
case ACPI_VIDEO_DISPLAY_CRT:
|
|
data->flags.crt = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_TV:
|
|
data->flags.tvout = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_DVI:
|
|
data->flags.dvi = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_LCD:
|
|
data->flags.lcd = 1;
|
|
break;
|
|
default:
|
|
data->flags.unknown = 1;
|
|
break;
|
|
}
|
|
if(attribute->bios_can_detect)
|
|
data->flags.bios = 1;
|
|
} else {
|
|
/* Check for legacy IDs */
|
|
device_type = acpi_video_get_device_type(video,
|
|
device_id);
|
|
/* Ignore bits 16 and 18-20 */
|
|
switch (device_type & 0xffe2ffff) {
|
|
case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR:
|
|
data->flags.crt = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_LEGACY_PANEL:
|
|
data->flags.lcd = 1;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_LEGACY_TV:
|
|
data->flags.tvout = 1;
|
|
break;
|
|
default:
|
|
data->flags.unknown = 1;
|
|
}
|
|
}
|
|
|
|
acpi_video_device_bind(video, data);
|
|
acpi_video_device_find_cap(data);
|
|
|
|
status = acpi_install_notify_handler(device->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
acpi_video_device_notify,
|
|
data);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Error installing notify handler\n");
|
|
if(data->brightness)
|
|
kfree(data->brightness->levels);
|
|
kfree(data->brightness);
|
|
kfree(data);
|
|
return -ENODEV;
|
|
}
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
list_add_tail(&data->entry, &video->video_device_list);
|
|
mutex_unlock(&video->device_list_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* video : video bus device
|
|
*
|
|
* Return:
|
|
* none
|
|
*
|
|
* Enumerate the video device list of the video bus,
|
|
* bind the ids with the corresponding video devices
|
|
* under the video bus.
|
|
*/
|
|
|
|
static void acpi_video_device_rebind(struct acpi_video_bus *video)
|
|
{
|
|
struct acpi_video_device *dev;
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
|
|
list_for_each_entry(dev, &video->video_device_list, entry)
|
|
acpi_video_device_bind(video, dev);
|
|
|
|
mutex_unlock(&video->device_list_lock);
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* video : video bus device
|
|
* device : video output device under the video
|
|
* bus
|
|
*
|
|
* Return:
|
|
* none
|
|
*
|
|
* Bind the ids with the corresponding video devices
|
|
* under the video bus.
|
|
*/
|
|
|
|
static void
|
|
acpi_video_device_bind(struct acpi_video_bus *video,
|
|
struct acpi_video_device *device)
|
|
{
|
|
struct acpi_video_enumerated_device *ids;
|
|
int i;
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
ids = &video->attached_array[i];
|
|
if (device->device_id == (ids->value.int_val & 0xffff)) {
|
|
ids->bind_info = device;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Arg:
|
|
* video : video bus device
|
|
*
|
|
* Return:
|
|
* < 0 : error
|
|
*
|
|
* Call _DOD to enumerate all devices attached to display adapter
|
|
*
|
|
*/
|
|
|
|
static int acpi_video_device_enumerate(struct acpi_video_bus *video)
|
|
{
|
|
int status;
|
|
int count;
|
|
int i;
|
|
struct acpi_video_enumerated_device *active_list;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *dod = NULL;
|
|
union acpi_object *obj;
|
|
|
|
status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
|
|
if (!ACPI_SUCCESS(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
|
|
return status;
|
|
}
|
|
|
|
dod = buffer.pointer;
|
|
if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
|
|
status = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
|
|
dod->package.count));
|
|
|
|
active_list = kcalloc(1 + dod->package.count,
|
|
sizeof(struct acpi_video_enumerated_device),
|
|
GFP_KERNEL);
|
|
if (!active_list) {
|
|
status = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
count = 0;
|
|
for (i = 0; i < dod->package.count; i++) {
|
|
obj = &dod->package.elements[i];
|
|
|
|
if (obj->type != ACPI_TYPE_INTEGER) {
|
|
printk(KERN_ERR PREFIX
|
|
"Invalid _DOD data in element %d\n", i);
|
|
continue;
|
|
}
|
|
|
|
active_list[count].value.int_val = obj->integer.value;
|
|
active_list[count].bind_info = NULL;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
|
|
(int)obj->integer.value));
|
|
count++;
|
|
}
|
|
|
|
kfree(video->attached_array);
|
|
|
|
video->attached_array = active_list;
|
|
video->attached_count = count;
|
|
|
|
out:
|
|
kfree(buffer.pointer);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
acpi_video_get_next_level(struct acpi_video_device *device,
|
|
u32 level_current, u32 event)
|
|
{
|
|
int min, max, min_above, max_below, i, l, delta = 255;
|
|
max = max_below = 0;
|
|
min = min_above = 255;
|
|
/* Find closest level to level_current */
|
|
for (i = 2; i < device->brightness->count; i++) {
|
|
l = device->brightness->levels[i];
|
|
if (abs(l - level_current) < abs(delta)) {
|
|
delta = l - level_current;
|
|
if (!delta)
|
|
break;
|
|
}
|
|
}
|
|
/* Ajust level_current to closest available level */
|
|
level_current += delta;
|
|
for (i = 2; i < device->brightness->count; i++) {
|
|
l = device->brightness->levels[i];
|
|
if (l < min)
|
|
min = l;
|
|
if (l > max)
|
|
max = l;
|
|
if (l < min_above && l > level_current)
|
|
min_above = l;
|
|
if (l > max_below && l < level_current)
|
|
max_below = l;
|
|
}
|
|
|
|
switch (event) {
|
|
case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
|
|
return (level_current < max) ? min_above : min;
|
|
case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
|
|
return (level_current < max) ? min_above : max;
|
|
case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
|
|
return (level_current > min) ? max_below : min;
|
|
case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
|
|
case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
|
|
return 0;
|
|
default:
|
|
return level_current;
|
|
}
|
|
}
|
|
|
|
static int
|
|
acpi_video_switch_brightness(struct acpi_video_device *device, int event)
|
|
{
|
|
unsigned long long level_current, level_next;
|
|
int result = -EINVAL;
|
|
|
|
/* no warning message if acpi_backlight=vendor is used */
|
|
if (!acpi_video_backlight_support())
|
|
return 0;
|
|
|
|
if (!device->brightness)
|
|
goto out;
|
|
|
|
result = acpi_video_device_lcd_get_level_current(device,
|
|
&level_current, 0);
|
|
if (result)
|
|
goto out;
|
|
|
|
level_next = acpi_video_get_next_level(device, level_current, event);
|
|
|
|
result = acpi_video_device_lcd_set_level(device, level_next);
|
|
|
|
if (!result)
|
|
backlight_force_update(device->backlight,
|
|
BACKLIGHT_UPDATE_HOTKEY);
|
|
|
|
out:
|
|
if (result)
|
|
printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
|
|
|
|
return result;
|
|
}
|
|
|
|
int acpi_video_get_edid(struct acpi_device *device, int type, int device_id,
|
|
void **edid)
|
|
{
|
|
struct acpi_video_bus *video;
|
|
struct acpi_video_device *video_device;
|
|
union acpi_object *buffer = NULL;
|
|
acpi_status status;
|
|
int i, length;
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
video = acpi_driver_data(device);
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
video_device = video->attached_array[i].bind_info;
|
|
length = 256;
|
|
|
|
if (!video_device)
|
|
continue;
|
|
|
|
if (!video_device->cap._DDC)
|
|
continue;
|
|
|
|
if (type) {
|
|
switch (type) {
|
|
case ACPI_VIDEO_DISPLAY_CRT:
|
|
if (!video_device->flags.crt)
|
|
continue;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_TV:
|
|
if (!video_device->flags.tvout)
|
|
continue;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_DVI:
|
|
if (!video_device->flags.dvi)
|
|
continue;
|
|
break;
|
|
case ACPI_VIDEO_DISPLAY_LCD:
|
|
if (!video_device->flags.lcd)
|
|
continue;
|
|
break;
|
|
}
|
|
} else if (video_device->device_id != device_id) {
|
|
continue;
|
|
}
|
|
|
|
status = acpi_video_device_EDID(video_device, &buffer, length);
|
|
|
|
if (ACPI_FAILURE(status) || !buffer ||
|
|
buffer->type != ACPI_TYPE_BUFFER) {
|
|
length = 128;
|
|
status = acpi_video_device_EDID(video_device, &buffer,
|
|
length);
|
|
if (ACPI_FAILURE(status) || !buffer ||
|
|
buffer->type != ACPI_TYPE_BUFFER) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
*edid = buffer->buffer.pointer;
|
|
return length;
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
EXPORT_SYMBOL(acpi_video_get_edid);
|
|
|
|
static int
|
|
acpi_video_bus_get_devices(struct acpi_video_bus *video,
|
|
struct acpi_device *device)
|
|
{
|
|
int status = 0;
|
|
struct acpi_device *dev;
|
|
|
|
/*
|
|
* There are systems where video module known to work fine regardless
|
|
* of broken _DOD and ignoring returned value here doesn't cause
|
|
* any issues later.
|
|
*/
|
|
acpi_video_device_enumerate(video);
|
|
|
|
list_for_each_entry(dev, &device->children, node) {
|
|
|
|
status = acpi_video_bus_get_one_device(dev, video);
|
|
if (status) {
|
|
printk(KERN_WARNING PREFIX
|
|
"Can't attach device\n");
|
|
continue;
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (!device || !device->video)
|
|
return -ENOENT;
|
|
|
|
status = acpi_remove_notify_handler(device->dev->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
acpi_video_device_notify);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_WARNING PREFIX
|
|
"Can't remove video notify handler\n");
|
|
}
|
|
if (device->backlight) {
|
|
backlight_device_unregister(device->backlight);
|
|
device->backlight = NULL;
|
|
}
|
|
if (device->cooling_dev) {
|
|
sysfs_remove_link(&device->dev->dev.kobj,
|
|
"thermal_cooling");
|
|
sysfs_remove_link(&device->cooling_dev->device.kobj,
|
|
"device");
|
|
thermal_cooling_device_unregister(device->cooling_dev);
|
|
device->cooling_dev = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
|
|
{
|
|
int status;
|
|
struct acpi_video_device *dev, *next;
|
|
|
|
mutex_lock(&video->device_list_lock);
|
|
|
|
list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
|
|
|
|
status = acpi_video_bus_put_one_device(dev);
|
|
if (ACPI_FAILURE(status))
|
|
printk(KERN_WARNING PREFIX
|
|
"hhuuhhuu bug in acpi video driver.\n");
|
|
|
|
if (dev->brightness) {
|
|
kfree(dev->brightness->levels);
|
|
kfree(dev->brightness);
|
|
}
|
|
list_del(&dev->entry);
|
|
kfree(dev);
|
|
}
|
|
|
|
mutex_unlock(&video->device_list_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* acpi_video interface */
|
|
|
|
static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
|
|
{
|
|
return acpi_video_bus_DOS(video, 0, 0);
|
|
}
|
|
|
|
static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
|
|
{
|
|
return acpi_video_bus_DOS(video, 0, 1);
|
|
}
|
|
|
|
static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
struct acpi_video_bus *video = acpi_driver_data(device);
|
|
struct input_dev *input;
|
|
int keycode = 0;
|
|
|
|
if (!video)
|
|
return;
|
|
|
|
input = video->input;
|
|
|
|
switch (event) {
|
|
case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
|
|
* most likely via hotkey. */
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_SWITCHVIDEOMODE;
|
|
break;
|
|
|
|
case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
|
|
* connector. */
|
|
acpi_video_device_enumerate(video);
|
|
acpi_video_device_rebind(video);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_SWITCHVIDEOMODE;
|
|
break;
|
|
|
|
case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_SWITCHVIDEOMODE;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_VIDEO_NEXT;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_VIDEO_PREV;
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Unsupported event [0x%x]\n", event));
|
|
break;
|
|
}
|
|
|
|
if (acpi_notifier_call_chain(device, event, 0))
|
|
/* Something vetoed the keypress. */
|
|
keycode = 0;
|
|
|
|
if (keycode) {
|
|
input_report_key(input, keycode, 1);
|
|
input_sync(input);
|
|
input_report_key(input, keycode, 0);
|
|
input_sync(input);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
|
|
{
|
|
struct acpi_video_device *video_device = data;
|
|
struct acpi_device *device = NULL;
|
|
struct acpi_video_bus *bus;
|
|
struct input_dev *input;
|
|
int keycode = 0;
|
|
|
|
if (!video_device)
|
|
return;
|
|
|
|
device = video_device->dev;
|
|
bus = video_device->video;
|
|
input = bus->input;
|
|
|
|
switch (event) {
|
|
case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
|
|
if (brightness_switch_enabled)
|
|
acpi_video_switch_brightness(video_device, event);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_BRIGHTNESS_CYCLE;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
|
|
if (brightness_switch_enabled)
|
|
acpi_video_switch_brightness(video_device, event);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_BRIGHTNESSUP;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
|
|
if (brightness_switch_enabled)
|
|
acpi_video_switch_brightness(video_device, event);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_BRIGHTNESSDOWN;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */
|
|
if (brightness_switch_enabled)
|
|
acpi_video_switch_brightness(video_device, event);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_BRIGHTNESS_ZERO;
|
|
break;
|
|
case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
|
|
if (brightness_switch_enabled)
|
|
acpi_video_switch_brightness(video_device, event);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
keycode = KEY_DISPLAY_OFF;
|
|
break;
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Unsupported event [0x%x]\n", event));
|
|
break;
|
|
}
|
|
|
|
acpi_notifier_call_chain(device, event, 0);
|
|
|
|
if (keycode) {
|
|
input_report_key(input, keycode, 1);
|
|
input_sync(input);
|
|
input_report_key(input, keycode, 0);
|
|
input_sync(input);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int acpi_video_resume(struct notifier_block *nb,
|
|
unsigned long val, void *ign)
|
|
{
|
|
struct acpi_video_bus *video;
|
|
struct acpi_video_device *video_device;
|
|
int i;
|
|
|
|
switch (val) {
|
|
case PM_HIBERNATION_PREPARE:
|
|
case PM_SUSPEND_PREPARE:
|
|
case PM_RESTORE_PREPARE:
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
video = container_of(nb, struct acpi_video_bus, pm_nb);
|
|
|
|
dev_info(&video->device->dev, "Restoring backlight state\n");
|
|
|
|
for (i = 0; i < video->attached_count; i++) {
|
|
video_device = video->attached_array[i].bind_info;
|
|
if (video_device && video_device->backlight)
|
|
acpi_video_set_brightness(video_device->backlight);
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static acpi_status
|
|
acpi_video_bus_match(acpi_handle handle, u32 level, void *context,
|
|
void **return_value)
|
|
{
|
|
struct acpi_device *device = context;
|
|
struct acpi_device *sibling;
|
|
int result;
|
|
|
|
if (handle == device->handle)
|
|
return AE_CTRL_TERMINATE;
|
|
|
|
result = acpi_bus_get_device(handle, &sibling);
|
|
if (result)
|
|
return AE_OK;
|
|
|
|
if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME))
|
|
return AE_ALREADY_EXISTS;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static int instance;
|
|
|
|
static int acpi_video_bus_add(struct acpi_device *device)
|
|
{
|
|
struct acpi_video_bus *video;
|
|
struct input_dev *input;
|
|
int error;
|
|
acpi_status status;
|
|
|
|
status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
|
|
device->parent->handle, 1,
|
|
acpi_video_bus_match, NULL,
|
|
device, NULL);
|
|
if (status == AE_ALREADY_EXISTS) {
|
|
printk(KERN_WARNING FW_BUG
|
|
"Duplicate ACPI video bus devices for the"
|
|
" same VGA controller, please try module "
|
|
"parameter \"video.allow_duplicates=1\""
|
|
"if the current driver doesn't work.\n");
|
|
if (!allow_duplicates)
|
|
return -ENODEV;
|
|
}
|
|
|
|
video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
|
|
if (!video)
|
|
return -ENOMEM;
|
|
|
|
/* a hack to fix the duplicate name "VID" problem on T61 */
|
|
if (!strcmp(device->pnp.bus_id, "VID")) {
|
|
if (instance)
|
|
device->pnp.bus_id[3] = '0' + instance;
|
|
instance ++;
|
|
}
|
|
/* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
|
|
if (!strcmp(device->pnp.bus_id, "VGA")) {
|
|
if (instance)
|
|
device->pnp.bus_id[3] = '0' + instance;
|
|
instance++;
|
|
}
|
|
|
|
video->device = device;
|
|
strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
|
|
device->driver_data = video;
|
|
|
|
acpi_video_bus_find_cap(video);
|
|
error = acpi_video_bus_check(video);
|
|
if (error)
|
|
goto err_free_video;
|
|
|
|
mutex_init(&video->device_list_lock);
|
|
INIT_LIST_HEAD(&video->video_device_list);
|
|
|
|
error = acpi_video_bus_get_devices(video, device);
|
|
if (error)
|
|
goto err_free_video;
|
|
|
|
video->input = input = input_allocate_device();
|
|
if (!input) {
|
|
error = -ENOMEM;
|
|
goto err_put_video;
|
|
}
|
|
|
|
error = acpi_video_bus_start_devices(video);
|
|
if (error)
|
|
goto err_free_input_dev;
|
|
|
|
snprintf(video->phys, sizeof(video->phys),
|
|
"%s/video/input0", acpi_device_hid(video->device));
|
|
|
|
input->name = acpi_device_name(video->device);
|
|
input->phys = video->phys;
|
|
input->id.bustype = BUS_HOST;
|
|
input->id.product = 0x06;
|
|
input->dev.parent = &device->dev;
|
|
input->evbit[0] = BIT(EV_KEY);
|
|
set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
|
|
set_bit(KEY_VIDEO_NEXT, input->keybit);
|
|
set_bit(KEY_VIDEO_PREV, input->keybit);
|
|
set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
|
|
set_bit(KEY_BRIGHTNESSUP, input->keybit);
|
|
set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
|
|
set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
|
|
set_bit(KEY_DISPLAY_OFF, input->keybit);
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
|
|
ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
|
|
video->flags.multihead ? "yes" : "no",
|
|
video->flags.rom ? "yes" : "no",
|
|
video->flags.post ? "yes" : "no");
|
|
|
|
video->pm_nb.notifier_call = acpi_video_resume;
|
|
video->pm_nb.priority = 0;
|
|
error = register_pm_notifier(&video->pm_nb);
|
|
if (error)
|
|
goto err_stop_video;
|
|
|
|
error = input_register_device(input);
|
|
if (error)
|
|
goto err_unregister_pm_notifier;
|
|
|
|
return 0;
|
|
|
|
err_unregister_pm_notifier:
|
|
unregister_pm_notifier(&video->pm_nb);
|
|
err_stop_video:
|
|
acpi_video_bus_stop_devices(video);
|
|
err_free_input_dev:
|
|
input_free_device(input);
|
|
err_put_video:
|
|
acpi_video_bus_put_devices(video);
|
|
kfree(video->attached_array);
|
|
err_free_video:
|
|
kfree(video);
|
|
device->driver_data = NULL;
|
|
|
|
return error;
|
|
}
|
|
|
|
static int acpi_video_bus_remove(struct acpi_device *device, int type)
|
|
{
|
|
struct acpi_video_bus *video = NULL;
|
|
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
video = acpi_driver_data(device);
|
|
|
|
unregister_pm_notifier(&video->pm_nb);
|
|
|
|
acpi_video_bus_stop_devices(video);
|
|
acpi_video_bus_put_devices(video);
|
|
|
|
input_unregister_device(video->input);
|
|
kfree(video->attached_array);
|
|
kfree(video);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init is_i740(struct pci_dev *dev)
|
|
{
|
|
if (dev->device == 0x00D1)
|
|
return 1;
|
|
if (dev->device == 0x7000)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int __init intel_opregion_present(void)
|
|
{
|
|
int opregion = 0;
|
|
struct pci_dev *dev = NULL;
|
|
u32 address;
|
|
|
|
for_each_pci_dev(dev) {
|
|
if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
|
|
continue;
|
|
if (dev->vendor != PCI_VENDOR_ID_INTEL)
|
|
continue;
|
|
/* We don't want to poke around undefined i740 registers */
|
|
if (is_i740(dev))
|
|
continue;
|
|
pci_read_config_dword(dev, 0xfc, &address);
|
|
if (!address)
|
|
continue;
|
|
opregion = 1;
|
|
}
|
|
return opregion;
|
|
}
|
|
|
|
int acpi_video_register(void)
|
|
{
|
|
int result = 0;
|
|
if (register_count) {
|
|
/*
|
|
* if the function of acpi_video_register is already called,
|
|
* don't register the acpi_vide_bus again and return no error.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
result = acpi_bus_register_driver(&acpi_video_bus);
|
|
if (result < 0)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* When the acpi_video_bus is loaded successfully, increase
|
|
* the counter reference.
|
|
*/
|
|
register_count = 1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(acpi_video_register);
|
|
|
|
void acpi_video_unregister(void)
|
|
{
|
|
if (!register_count) {
|
|
/*
|
|
* If the acpi video bus is already unloaded, don't
|
|
* unload it again and return directly.
|
|
*/
|
|
return;
|
|
}
|
|
acpi_bus_unregister_driver(&acpi_video_bus);
|
|
|
|
register_count = 0;
|
|
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(acpi_video_unregister);
|
|
|
|
/*
|
|
* This is kind of nasty. Hardware using Intel chipsets may require
|
|
* the video opregion code to be run first in order to initialise
|
|
* state before any ACPI video calls are made. To handle this we defer
|
|
* registration of the video class until the opregion code has run.
|
|
*/
|
|
|
|
static int __init acpi_video_init(void)
|
|
{
|
|
dmi_check_system(video_dmi_table);
|
|
|
|
if (intel_opregion_present())
|
|
return 0;
|
|
|
|
return acpi_video_register();
|
|
}
|
|
|
|
static void __exit acpi_video_exit(void)
|
|
{
|
|
acpi_video_unregister();
|
|
|
|
return;
|
|
}
|
|
|
|
module_init(acpi_video_init);
|
|
module_exit(acpi_video_exit);
|