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Merge branch 'acpi-video'

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* acpi-video: (38 commits)
  ACPI / video: Make acpi_video_unregister_backlight() private
  acpi-video-detect: Remove old API
  toshiba-acpi: Port to new backlight interface selection API
  thinkpad-acpi: Port to new backlight interface selection API
  sony-laptop: Port to new backlight interface selection API
  samsung-laptop: Port to new backlight interface selection API
  msi-wmi: Port to new backlight interface selection API
  msi-laptop: Port to new backlight interface selection API
  intel-oaktrail: Port to new backlight interface selection API
  ideapad-laptop: Port to new backlight interface selection API
  fujitsu-laptop: Port to new backlight interface selection API
  eeepc-laptop: Port to new backlight interface selection API
  dell-wmi: Port to new backlight interface selection API
  dell-laptop: Port to new backlight interface selection API
  compal-laptop: Port to new backlight interface selection API
  asus-wmi: Port to new backlight interface selection API
  asus-laptop: Port to new backlight interface selection API
  apple-gmux: Port to new backlight interface selection API
  acer-wmi: Port to new backlight interface selection API
  ACPI / video: Fix acpi_video _register vs _unregister_backlight race
  ...
This commit is contained in:
Rafael J. Wysocki 2015-06-19 01:17:26 +02:00
commit 4def8a360f
28 changed files with 451 additions and 571 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/acpi/Makefile
View File

@ -52,9 +52,6 @@ acpi-$(CONFIG_X86) += acpi_cmos_rtc.o
acpi-$(CONFIG_DEBUG_FS) += debugfs.o
acpi-$(CONFIG_ACPI_NUMA) += numa.o
acpi-$(CONFIG_ACPI_PROCFS_POWER) += cm_sbs.o
ifdef CONFIG_ACPI_VIDEO
acpi-y += video_detect.o
endif
acpi-y += acpi_lpat.o
acpi-$(CONFIG_ACPI_GENERIC_GSI) += gsi.o
@ -95,3 +92,5 @@ obj-$(CONFIG_ACPI_EXTLOG) += acpi_extlog.o
obj-$(CONFIG_PMIC_OPREGION) += pmic/intel_pmic.o
obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o
obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
video-objs += acpi_video.o video_detect.o

283
drivers/acpi/video.c → drivers/acpi/acpi_video.c
View File

@ -43,7 +43,7 @@
#include <acpi/video.h>
#include <asm/uaccess.h>
#include "internal.h"
#define PREFIX "ACPI: "
#define ACPI_VIDEO_BUS_NAME "Video Bus"
#define ACPI_VIDEO_DEVICE_NAME "Video Device"
@ -78,26 +78,17 @@ module_param(brightness_switch_enabled, bool, 0644);
static bool allow_duplicates;
module_param(allow_duplicates, bool, 0644);
/*
* For Windows 8 systems: used to decide if video module
* should skip registering backlight interface of its own.
*/
enum {
NATIVE_BACKLIGHT_NOT_SET = -1,
NATIVE_BACKLIGHT_OFF,
NATIVE_BACKLIGHT_ON,
};
static int use_native_backlight_param = NATIVE_BACKLIGHT_NOT_SET;
module_param_named(use_native_backlight, use_native_backlight_param, int, 0444);
static int use_native_backlight_dmi = NATIVE_BACKLIGHT_NOT_SET;
static int disable_backlight_sysfs_if = -1;
module_param(disable_backlight_sysfs_if, int, 0444);
static int register_count;
static DEFINE_MUTEX(register_count_mutex);
static struct mutex video_list_lock;
static struct list_head video_bus_head;
static int acpi_video_bus_add(struct acpi_device *device);
static int acpi_video_bus_remove(struct acpi_device *device);
static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
void acpi_video_detect_exit(void);
static const struct acpi_device_id video_device_ids[] = {
{ACPI_VIDEO_HID, 0},
@ -157,7 +148,6 @@ struct acpi_video_enumerated_device {
struct acpi_video_bus {
struct acpi_device *device;
bool backlight_registered;
bool backlight_notifier_registered;
u8 dos_setting;
struct acpi_video_enumerated_device *attached_array;
u8 attached_count;
@ -170,7 +160,6 @@ struct acpi_video_bus {
struct input_dev *input;
char phys[32]; /* for input device */
struct notifier_block pm_nb;
struct notifier_block backlight_nb;
};
struct acpi_video_device_flags {
@ -241,24 +230,6 @@ static int acpi_video_get_next_level(struct acpi_video_device *device,
u32 level_current, u32 event);
static void acpi_video_switch_brightness(struct work_struct *work);
static bool acpi_video_use_native_backlight(void)
{
if (use_native_backlight_param != NATIVE_BACKLIGHT_NOT_SET)
return use_native_backlight_param;
else if (use_native_backlight_dmi != NATIVE_BACKLIGHT_NOT_SET)
return use_native_backlight_dmi;
return acpi_osi_is_win8();
}
bool acpi_video_verify_backlight_support(void)
{
if (acpi_video_use_native_backlight() &&
backlight_device_registered(BACKLIGHT_RAW))
return false;
return acpi_video_backlight_support();
}
EXPORT_SYMBOL_GPL(acpi_video_verify_backlight_support);
/* backlight device sysfs support */
static int acpi_video_get_brightness(struct backlight_device *bd)
{
@ -413,25 +384,21 @@ acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
*/
static int bqc_offset_aml_bug_workaround;
static int __init video_set_bqc_offset(const struct dmi_system_id *d)
static int video_set_bqc_offset(const struct dmi_system_id *d)
{
bqc_offset_aml_bug_workaround = 9;
return 0;
}
static int __init video_disable_native_backlight(const struct dmi_system_id *d)
static int video_disable_backlight_sysfs_if(
const struct dmi_system_id *d)
{
use_native_backlight_dmi = NATIVE_BACKLIGHT_OFF;
if (disable_backlight_sysfs_if == -1)
disable_backlight_sysfs_if = 1;
return 0;
}
static int __init video_enable_native_backlight(const struct dmi_system_id *d)
{
use_native_backlight_dmi = NATIVE_BACKLIGHT_ON;
return 0;
}
static struct dmi_system_id video_dmi_table[] __initdata = {
static struct dmi_system_id video_dmi_table[] = {
/*
* Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
*/
@ -477,110 +444,19 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
},
/*
* 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
* Some machines have a broken acpi-video interface for brightness
* control, but still need an acpi_video_device_lcd_set_level() call
* on resume to turn the backlight power on. We Enable backlight
* control on these systems, but do not register a backlight sysfs
* as brightness control does not work.
*/
{
.callback = video_disable_native_backlight,
.ident = "ThinkPad T420",
/* https://bugs.freedesktop.org/show_bug.cgi?id=82634 */
.callback = video_disable_backlight_sysfs_if,
.ident = "Toshiba Portege R830",
.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"),
},
},
{
.callback = video_disable_native_backlight,
.ident = "ThinkPad X201s",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
},
},
/* 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"),
},
},
{
.callback = video_disable_native_backlight,
.ident = "SAMSUNG 870Z5E/880Z5E/680Z5E",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"),
},
},
{
.callback = video_disable_native_backlight,
.ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "370R4E/370R4V/370R5E/3570RE/370R5V"),
},
},
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
.callback = video_disable_native_backlight,
.ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "3570R/370R/470R/450R/510R/4450RV"),
},
},
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
.callback = video_disable_native_backlight,
.ident = "SAMSUNG 730U3E/740U3E",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
},
},
{
/* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
.callback = video_disable_native_backlight,
.ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "900X3C/900X3D/900X3E/900X4C/900X4D"),
},
},
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
.callback = video_disable_native_backlight,
.ident = "Dell XPS15 L521X",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
},
},
/* Non win8 machines which need native backlight nevertheless */
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
.callback = video_enable_native_backlight,
.ident = "Lenovo Ideapad Z570",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R830"),
},
},
{}
@ -1382,7 +1258,7 @@ acpi_video_switch_brightness(struct work_struct *work)
int result = -EINVAL;
/* no warning message if acpi_backlight=vendor or a quirk is used */
if (!acpi_video_verify_backlight_support())
if (!device->backlight)
return;
if (!device->brightness)
@ -1657,8 +1533,9 @@ static int acpi_video_resume(struct notifier_block *nb,
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);
if (video_device && video_device->brightness)
acpi_video_device_lcd_set_level(video_device,
video_device->brightness->curr);
}
return NOTIFY_OK;
@ -1707,6 +1584,10 @@ static void acpi_video_dev_register_backlight(struct acpi_video_device *device)
result = acpi_video_init_brightness(device);
if (result)
return;
if (disable_backlight_sysfs_if > 0)
return;
name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
if (!name)
return;
@ -1729,8 +1610,10 @@ static void acpi_video_dev_register_backlight(struct acpi_video_device *device)
&acpi_backlight_ops,
&props);
kfree(name);
if (IS_ERR(device->backlight))
if (IS_ERR(device->backlight)) {
device->backlight = NULL;
return;
}
/*
* Save current brightness level in case we have to restore it
@ -1787,7 +1670,7 @@ static int acpi_video_bus_register_backlight(struct acpi_video_bus *video)
acpi_video_run_bcl_for_osi(video);
if (!acpi_video_verify_backlight_support())
if (acpi_video_get_backlight_type() != acpi_backlight_video)
return 0;
mutex_lock(&video->device_list_lock);
@ -1931,56 +1814,6 @@ static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video)
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;
@ -2062,7 +1895,6 @@ static int acpi_video_bus_add(struct acpi_device *device)
acpi_video_bus_register_backlight(video);
acpi_video_bus_add_notify_handler(video);
acpi_video_bus_add_backlight_notify_handler(video);
return 0;
@ -2086,7 +1918,6 @@ static int acpi_video_bus_remove(struct acpi_device *device)
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);
@ -2134,22 +1965,25 @@ static int __init intel_opregion_present(void)
int acpi_video_register(void)
{
int ret;
int ret = 0;
mutex_lock(&register_count_mutex);
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;
goto leave;
}
mutex_init(&video_list_lock);
INIT_LIST_HEAD(&video_bus_head);
dmi_check_system(video_dmi_table);
ret = acpi_bus_register_driver(&acpi_video_bus);
if (ret)
return ret;
goto leave;
/*
* When the acpi_video_bus is loaded successfully, increase
@ -2157,24 +1991,20 @@ int acpi_video_register(void)
*/
register_count = 1;
return 0;
leave:
mutex_unlock(&register_count_mutex);
return ret;
}
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;
mutex_lock(&register_count_mutex);
if (register_count) {
acpi_bus_unregister_driver(&acpi_video_bus);
register_count = 0;
}
acpi_bus_unregister_driver(&acpi_video_bus);
register_count = 0;
return;
mutex_unlock(&register_count_mutex);
}
EXPORT_SYMBOL(acpi_video_unregister);
@ -2182,15 +2012,15 @@ 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);
mutex_lock(&register_count_mutex);
if (register_count) {
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);
}
mutex_unlock(&register_count_mutex);
}
EXPORT_SYMBOL(acpi_video_unregister_backlight);
/*
* This is kind of nasty. Hardware using Intel chipsets may require
@ -2212,8 +2042,6 @@ static int __init acpi_video_init(void)
if (acpi_disabled)
return 0;
dmi_check_system(video_dmi_table);
if (intel_opregion_present())
return 0;
@ -2222,6 +2050,7 @@ static int __init acpi_video_init(void)
static void __exit acpi_video_exit(void)
{
acpi_video_detect_exit();
acpi_video_unregister();
return;

7
drivers/acpi/internal.h
View File

@ -183,13 +183,6 @@ static inline int suspend_nvs_save(void) { return 0; }
static inline void suspend_nvs_restore(void) {}
#endif
/*--------------------------------------------------------------------------
Video
-------------------------------------------------------------------------- */
#if defined(CONFIG_ACPI_VIDEO) || defined(CONFIG_ACPI_VIDEO_MODULE)
bool acpi_osi_is_win8(void);
#endif
/*--------------------------------------------------------------------------
Device properties
-------------------------------------------------------------------------- */

6
drivers/acpi/osl.c
View File

@ -1680,6 +1680,12 @@ int acpi_resources_are_enforced(void)
}
EXPORT_SYMBOL(acpi_resources_are_enforced);
bool acpi_osi_is_win8(void)
{
return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
}
EXPORT_SYMBOL(acpi_osi_is_win8);
/*
* Deallocate the memory for a spinlock.
*/

56
drivers/acpi/scan.c
View File

@ -1935,6 +1935,62 @@ bool acpi_dock_match(acpi_handle handle)
return acpi_has_method(handle, "_DCK");
}
static acpi_status
acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context,
void **return_value)
{
long *cap = context;
if (acpi_has_method(handle, "_BCM") &&
acpi_has_method(handle, "_BCL")) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight "
"support\n"));
*cap |= ACPI_VIDEO_BACKLIGHT;
if (!acpi_has_method(handle, "_BQC"))
printk(KERN_WARNING FW_BUG PREFIX "No _BQC method, "
"cannot determine initial brightness\n");
/* We have backlight support, no need to scan further */
return AE_CTRL_TERMINATE;
}
return 0;
}
/* Returns true if the ACPI object is a video device which can be
* handled by video.ko.
* The device will get a Linux specific CID added in scan.c to
* identify the device as an ACPI graphics device
* Be aware that the graphics device may not be physically present
* Use acpi_video_get_capabilities() to detect general ACPI video
* capabilities of present cards
*/
long acpi_is_video_device(acpi_handle handle)
{
long video_caps = 0;
/* Is this device able to support video switching ? */
if (acpi_has_method(handle, "_DOD") || acpi_has_method(handle, "_DOS"))
video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING;
/* Is this device able to retrieve a video ROM ? */
if (acpi_has_method(handle, "_ROM"))
video_caps |= ACPI_VIDEO_ROM_AVAILABLE;
/* Is this device able to configure which video head to be POSTed ? */
if (acpi_has_method(handle, "_VPO") &&
acpi_has_method(handle, "_GPD") &&
acpi_has_method(handle, "_SPD"))
video_caps |= ACPI_VIDEO_DEVICE_POSTING;
/* Only check for backlight functionality if one of the above hit. */
if (video_caps)
acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
ACPI_UINT32_MAX, acpi_backlight_cap_match, NULL,
&video_caps, NULL);
return video_caps;
}
EXPORT_SYMBOL(acpi_is_video_device);
const char *acpi_device_hid(struct acpi_device *device)
{
struct acpi_hardware_id *hid;

15
drivers/acpi/utils.c
View File

@ -712,3 +712,18 @@ bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, int rev, u64 funcs)
return false;
}
EXPORT_SYMBOL(acpi_check_dsm);
/*
* acpi_backlight= handling, this is done here rather then in video_detect.c
* because __setup cannot be used in modules.
*/
char acpi_video_backlight_string[16];
EXPORT_SYMBOL(acpi_video_backlight_string);
static int __init acpi_backlight(char *str)
{
strlcpy(acpi_video_backlight_string, str,
sizeof(acpi_video_backlight_string));
return 1;
}
__setup("acpi_backlight=", acpi_backlight);

427
drivers/acpi/video_detect.c
View File

@ -1,107 +1,62 @@
/*
* Copyright (C) 2015 Red Hat Inc.
* Hans de Goede <hdegoede@redhat.com>
* Copyright (C) 2008 SuSE Linux Products GmbH
* Thomas Renninger <trenn@suse.de>
*
* May be copied or modified under the terms of the GNU General Public License
*
* video_detect.c:
* Provides acpi_is_video_device() for early scanning of ACPI devices in scan.c
* There a Linux specific (Spec does not provide a HID for video devices) is
* assigned
*
* After PCI devices are glued with ACPI devices
* acpi_get_pci_dev() can be called to identify ACPI graphics
* devices for which a real graphics card is plugged in
*
* Now acpi_video_get_capabilities() can be called to check which
* capabilities the graphics cards plugged in support. The check for general
* video capabilities will be triggered by the first caller of
* acpi_video_get_capabilities(NULL); which will happen when the first
* backlight switching supporting driver calls:
* acpi_video_backlight_support();
*
* Depending on whether ACPI graphics extensions (cmp. ACPI spec Appendix B)
* are available, video.ko should be used to handle the device.
*
* Otherwise vendor specific drivers like thinkpad_acpi, asus-laptop,
* sony_acpi,... can take care about backlight brightness.
*
* If CONFIG_ACPI_VIDEO is neither set as "compiled in" (y) nor as a module (m)
* this file will not be compiled, acpi_video_get_capabilities() and
* acpi_video_backlight_support() will always return 0 and vendor specific
* drivers always can handle backlight.
* Backlight drivers can use acpi_video_get_backlight_type() to determine
* which driver should handle the backlight.
*
* If CONFIG_ACPI_VIDEO is neither set as "compiled in" (y) nor as a module (m)
* this file will not be compiled and acpi_video_get_backlight_type() will
* always return acpi_backlight_vendor.
*/
#include <linux/export.h>
#include <linux/acpi.h>
#include <linux/backlight.h>
#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/pci.h>
#include "internal.h"
#include <linux/types.h>
#include <acpi/video.h>
ACPI_MODULE_NAME("video");
#define _COMPONENT ACPI_VIDEO_COMPONENT
static long acpi_video_support;
static bool acpi_video_caps_checked;
void acpi_video_unregister_backlight(void);
static acpi_status
acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context,
void **return_value)
static bool backlight_notifier_registered;
static struct notifier_block backlight_nb;
static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef;
static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef;
static void acpi_video_parse_cmdline(void)
{
long *cap = context;
if (acpi_has_method(handle, "_BCM") &&
acpi_has_method(handle, "_BCL")) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight "
"support\n"));
*cap |= ACPI_VIDEO_BACKLIGHT;
if (!acpi_has_method(handle, "_BQC"))
printk(KERN_WARNING FW_BUG PREFIX "No _BQC method, "
"cannot determine initial brightness\n");
/* We have backlight support, no need to scan further */
return AE_CTRL_TERMINATE;
}
return 0;
if (!strcmp("vendor", acpi_video_backlight_string))
acpi_backlight_cmdline = acpi_backlight_vendor;
if (!strcmp("video", acpi_video_backlight_string))
acpi_backlight_cmdline = acpi_backlight_video;
if (!strcmp("native", acpi_video_backlight_string))
acpi_backlight_cmdline = acpi_backlight_native;
if (!strcmp("none", acpi_video_backlight_string))
acpi_backlight_cmdline = acpi_backlight_none;
}
/* Returns true if the ACPI object is a video device which can be
* handled by video.ko.
* The device will get a Linux specific CID added in scan.c to
* identify the device as an ACPI graphics device
* Be aware that the graphics device may not be physically present
* Use acpi_video_get_capabilities() to detect general ACPI video
* capabilities of present cards
*/
long acpi_is_video_device(acpi_handle handle)
{
long video_caps = 0;
/* Is this device able to support video switching ? */
if (acpi_has_method(handle, "_DOD") || acpi_has_method(handle, "_DOS"))
video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING;
/* Is this device able to retrieve a video ROM ? */
if (acpi_has_method(handle, "_ROM"))
video_caps |= ACPI_VIDEO_ROM_AVAILABLE;
/* Is this device able to configure which video head to be POSTed ? */
if (acpi_has_method(handle, "_VPO") &&
acpi_has_method(handle, "_GPD") &&
acpi_has_method(handle, "_SPD"))
video_caps |= ACPI_VIDEO_DEVICE_POSTING;
/* Only check for backlight functionality if one of the above hit. */
if (video_caps)
acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
ACPI_UINT32_MAX, acpi_backlight_cap_match, NULL,
&video_caps, NULL);
return video_caps;
}
EXPORT_SYMBOL(acpi_is_video_device);
static acpi_status
find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
{
@ -109,7 +64,7 @@ find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
struct pci_dev *dev;
struct acpi_device *acpi_dev;
const struct acpi_device_id video_ids[] = {
static const struct acpi_device_id video_ids[] = {
{ACPI_VIDEO_HID, 0},
{"", 0},
};
@ -130,11 +85,23 @@ find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
* buggy */
static int video_detect_force_vendor(const struct dmi_system_id *d)
{
acpi_video_support |= ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
acpi_backlight_dmi = acpi_backlight_vendor;
return 0;
}
static struct dmi_system_id video_detect_dmi_table[] = {
static int video_detect_force_video(const struct dmi_system_id *d)
{
acpi_backlight_dmi = acpi_backlight_video;
return 0;
}
static int video_detect_force_native(const struct dmi_system_id *d)
{
acpi_backlight_dmi = acpi_backlight_native;
return 0;
}
static const struct dmi_system_id video_detect_dmi_table[] = {
/* On Samsung X360, the BIOS will set a flag (VDRV) if generic
* ACPI backlight device is used. This flag will definitively break
* the backlight interface (even the vendor interface) untill next
@ -174,137 +141,209 @@ static struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5737"),
},
},
/*
* 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_detect_force_video,
.ident = "ThinkPad T420",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
},
},
{
.callback = video_detect_force_video,
.ident = "ThinkPad T520",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"),
},
},
{
.callback = video_detect_force_video,
.ident = "ThinkPad X201s",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
},
},
/* The native backlight controls do not work on some older machines */
{
/* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */
.callback = video_detect_force_video,
.ident = "HP ENVY 15 Notebook",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"),
},
},
{
.callback = video_detect_force_video,
.ident = "SAMSUNG 870Z5E/880Z5E/680Z5E",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"),
},
},
{
.callback = video_detect_force_video,
.ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME,
"370R4E/370R4V/370R5E/3570RE/370R5V"),
},
},
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
.callback = video_detect_force_video,
.ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME,
"3570R/370R/470R/450R/510R/4450RV"),
},
},
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
.callback = video_detect_force_video,
.ident = "SAMSUNG 730U3E/740U3E",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
},
},
{
/* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
.callback = video_detect_force_video,
.ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME,
"900X3C/900X3D/900X3E/900X4C/900X4D"),
},
},
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
.callback = video_detect_force_video,
.ident = "Dell XPS15 L521X",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
},
},
/* Non win8 machines which need native backlight nevertheless */
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
.callback = video_detect_force_native,
.ident = "Lenovo Ideapad Z570",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
},
},
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
.callback = video_detect_force_native,
.ident = "Apple MacBook Pro 12,1",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
},
},
{ },
};
/*
* Returns the video capabilities of a specific ACPI graphics device
*
* if NULL is passed as argument all ACPI devices are enumerated and
* all graphics capabilities of physically present devices are
* summarized and returned. This is cached and done only once.
*/
long acpi_video_get_capabilities(acpi_handle graphics_handle)
static int acpi_video_backlight_notify(struct notifier_block *nb,
unsigned long val, void *bd)
{
long caps = 0;
struct acpi_device *tmp_dev;
acpi_status status;
struct backlight_device *backlight = bd;
if (acpi_video_caps_checked && graphics_handle == NULL)
return acpi_video_support;
/* A raw bl registering may change video -> native */
if (backlight->props.type == BACKLIGHT_RAW &&
val == BACKLIGHT_REGISTERED &&
acpi_video_get_backlight_type() != acpi_backlight_video)
acpi_video_unregister_backlight();
if (!graphics_handle) {
/* Only do the global walk through all graphics devices once */
return NOTIFY_OK;
}
/*
* Determine which type of backlight interface to use on this system,
* First check cmdline, then dmi quirks, then do autodetect.
*
* The autodetect order is:
* 1) Is the acpi-video backlight interface supported ->
* no, use a vendor interface
* 2) Is this a win8 "ready" BIOS and do we have a native interface ->
* yes, use a native interface
* 3) Else use the acpi-video interface
*
* Arguably the native on win8 check should be done first, but that would
* be a behavior change, which may causes issues.
*/
enum acpi_backlight_type acpi_video_get_backlight_type(void)
{
static DEFINE_MUTEX(init_mutex);
static bool init_done;
static long video_caps;
/* Parse cmdline, dmi and acpi only once */
mutex_lock(&init_mutex);
if (!init_done) {
acpi_video_parse_cmdline();
dmi_check_system(video_detect_dmi_table);
acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, find_video, NULL,
&caps, NULL);
/* There might be boot param flags set already... */
acpi_video_support |= caps;
acpi_video_caps_checked = 1;
/* Add blacklists here. Be careful to use the right *DMI* bits
* to still be able to override logic via boot params, e.g.:
*
* if (dmi_name_in_vendors("XY")) {
* acpi_video_support |=
* ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
*}
*/
dmi_check_system(video_detect_dmi_table);
} else {
status = acpi_bus_get_device(graphics_handle, &tmp_dev);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Invalid device"));
return 0;
}
acpi_walk_namespace(ACPI_TYPE_DEVICE, graphics_handle,
ACPI_UINT32_MAX, find_video, NULL,
&caps, NULL);
&video_caps, NULL);
backlight_nb.notifier_call = acpi_video_backlight_notify;
backlight_nb.priority = 0;
if (backlight_register_notifier(&backlight_nb) == 0)
backlight_notifier_registered = true;
init_done = true;
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "We have 0x%lX video support %s %s\n",
graphics_handle ? caps : acpi_video_support,
graphics_handle ? "on device " : "in general",
graphics_handle ? acpi_device_bid(tmp_dev) : ""));
return caps;
mutex_unlock(&init_mutex);
if (acpi_backlight_cmdline != acpi_backlight_undef)
return acpi_backlight_cmdline;
if (acpi_backlight_dmi != acpi_backlight_undef)
return acpi_backlight_dmi;
if (!(video_caps & ACPI_VIDEO_BACKLIGHT))
return acpi_backlight_vendor;
if (acpi_osi_is_win8() && backlight_device_registered(BACKLIGHT_RAW))
return acpi_backlight_native;
return acpi_backlight_video;
}
EXPORT_SYMBOL(acpi_video_get_capabilities);
static void acpi_video_caps_check(void)
{
/*
* We must check whether the ACPI graphics device is physically plugged
* in. Therefore this must be called after binding PCI and ACPI devices
*/
if (!acpi_video_caps_checked)
acpi_video_get_capabilities(NULL);
}
bool acpi_osi_is_win8(void)
{
return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
}
EXPORT_SYMBOL(acpi_osi_is_win8);
/* Promote the vendor interface instead of the generic video module.
* This function allow DMI blacklists to be implemented by externals
* platform drivers instead of putting a big blacklist in video_detect.c
* After calling this function you will probably want to call
* acpi_video_unregister() to make sure the video module is not loaded
*/
void acpi_video_dmi_promote_vendor(void)
{
acpi_video_caps_check();
acpi_video_support |= ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
}
EXPORT_SYMBOL(acpi_video_dmi_promote_vendor);
/* To be called when a driver who previously promoted the vendor
* interface */
void acpi_video_dmi_demote_vendor(void)
{
acpi_video_caps_check();
acpi_video_support &= ~ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
}
EXPORT_SYMBOL(acpi_video_dmi_demote_vendor);
/* Returns true if video.ko can do backlight switching */
int acpi_video_backlight_support(void)
{
acpi_video_caps_check();
/* First check for boot param -> highest prio */
if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_FORCE_VENDOR)
return 0;
else if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_FORCE_VIDEO)
return 1;
/* Then check for DMI blacklist -> second highest prio */
if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_DMI_VENDOR)
return 0;
else if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_DMI_VIDEO)
return 1;
/* Then go the default way */
return acpi_video_support & ACPI_VIDEO_BACKLIGHT;
}
EXPORT_SYMBOL(acpi_video_backlight_support);
EXPORT_SYMBOL(acpi_video_get_backlight_type);
/*
* Use acpi_backlight=vendor/video to force that backlight switching
* is processed by vendor specific acpi drivers or video.ko driver.
* Set the preferred backlight interface type based on DMI info.
* This function allows DMI blacklists to be implemented by external
* platform drivers instead of putting a big blacklist in video_detect.c
*/
static int __init acpi_backlight(char *str)
void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
{
if (str == NULL || *str == '\0')
return 1;
else {
if (!strcmp("vendor", str))
acpi_video_support |=
ACPI_VIDEO_BACKLIGHT_FORCE_VENDOR;
if (!strcmp("video", str))
acpi_video_support |=
ACPI_VIDEO_BACKLIGHT_FORCE_VIDEO;
}
return 1;
acpi_backlight_dmi = type;
/* Remove acpi-video backlight interface if it is no longer desired */
if (acpi_video_get_backlight_type() != acpi_backlight_video)
acpi_video_unregister_backlight();
}
EXPORT_SYMBOL(acpi_video_set_dmi_backlight_type);
void __exit acpi_video_detect_exit(void)
{
if (backlight_notifier_registered)
backlight_unregister_notifier(&backlight_nb);
}
__setup("acpi_backlight=", acpi_backlight);

12
drivers/gpu/drm/i915/intel_opregion.c
View File

@ -396,16 +396,6 @@ int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
return -EINVAL;
}
/*
* If the vendor backlight interface is not in use and ACPI backlight interface
* is broken, do not bother processing backlight change requests from firmware.
*/
static bool should_ignore_backlight_request(void)
{
return acpi_video_backlight_support() &&
!acpi_video_verify_backlight_support();
}
static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@ -414,7 +404,7 @@ static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
if (should_ignore_backlight_request()) {
if (acpi_video_get_backlight_type() == acpi_backlight_native) {
DRM_DEBUG_KMS("opregion backlight request ignored\n");
return 0;
}

21
drivers/platform/x86/Kconfig
View File

@ -71,9 +71,10 @@ config ASUS_LAPTOP
depends on ACPI
select LEDS_CLASS
select NEW_LEDS
select BACKLIGHT_CLASS_DEVICE
depends on BACKLIGHT_CLASS_DEVICE
depends on INPUT
depends on RFKILL || RFKILL = n
depends on ACPI_VIDEO || ACPI_VIDEO = n
select INPUT_SPARSEKMAP
select INPUT_POLLDEV
---help---
@ -95,6 +96,7 @@ config DELL_LAPTOP
depends on X86
depends on DCDBAS
depends on BACKLIGHT_CLASS_DEVICE
depends on ACPI_VIDEO || ACPI_VIDEO = n
depends on RFKILL || RFKILL = n
depends on SERIO_I8042
select POWER_SUPPLY
@ -109,6 +111,7 @@ config DELL_WMI
tristate "Dell WMI extras"
depends on ACPI_WMI
depends on INPUT
depends on ACPI_VIDEO || ACPI_VIDEO = n
select INPUT_SPARSEKMAP
---help---
Say Y here if you want to support WMI-based hotkeys on Dell laptops.
@ -144,6 +147,7 @@ config FUJITSU_LAPTOP
depends on ACPI
depends on INPUT
depends on BACKLIGHT_CLASS_DEVICE
depends on ACPI_VIDEO || ACPI_VIDEO = n
depends on LEDS_CLASS || LEDS_CLASS=n
---help---
This is a driver for laptops built by Fujitsu:
@ -247,6 +251,7 @@ config MSI_LAPTOP
tristate "MSI Laptop Extras"
depends on ACPI
depends on BACKLIGHT_CLASS_DEVICE
depends on ACPI_VIDEO || ACPI_VIDEO = n
depends on RFKILL
depends on INPUT && SERIO_I8042
select INPUT_SPARSEKMAP
@ -280,6 +285,7 @@ config COMPAL_LAPTOP
tristate "Compal (and others) Laptop Extras"
depends on ACPI
depends on BACKLIGHT_CLASS_DEVICE
depends on ACPI_VIDEO || ACPI_VIDEO = n
depends on RFKILL
depends on HWMON
depends on POWER_SUPPLY
@ -296,7 +302,8 @@ config COMPAL_LAPTOP
config SONY_LAPTOP
tristate "Sony Laptop Extras"
depends on ACPI
select BACKLIGHT_CLASS_DEVICE
depends on ACPI_VIDEO || ACPI_VIDEO = n
depends on BACKLIGHT_CLASS_DEVICE
depends on INPUT
depends on RFKILL
---help---
@ -321,6 +328,7 @@ config IDEAPAD_LAPTOP
depends on RFKILL && INPUT
depends on SERIO_I8042
depends on BACKLIGHT_CLASS_DEVICE
depends on ACPI_VIDEO || ACPI_VIDEO = n
select INPUT_SPARSEKMAP
help
This is a driver for Lenovo IdeaPad netbooks contains drivers for
@ -331,8 +339,8 @@ config THINKPAD_ACPI
depends on ACPI
depends on INPUT
depends on RFKILL || RFKILL = n
select BACKLIGHT_LCD_SUPPORT
select BACKLIGHT_CLASS_DEVICE
depends on ACPI_VIDEO || ACPI_VIDEO = n
depends on BACKLIGHT_CLASS_DEVICE
select HWMON
select NVRAM
select NEW_LEDS
@ -500,8 +508,9 @@ config EEEPC_LAPTOP
depends on ACPI
depends on INPUT
depends on RFKILL || RFKILL = n
depends on ACPI_VIDEO || ACPI_VIDEO = n
depends on HOTPLUG_PCI
select BACKLIGHT_CLASS_DEVICE
depends on BACKLIGHT_CLASS_DEVICE
select HWMON
select LEDS_CLASS
select NEW_LEDS
@ -587,6 +596,7 @@ config MSI_WMI
depends on ACPI_WMI
depends on INPUT
depends on BACKLIGHT_CLASS_DEVICE
depends on ACPI_VIDEO || ACPI_VIDEO = n
select INPUT_SPARSEKMAP
help
Say Y here if you want to support WMI-based hotkeys on MSI laptops.
@ -824,6 +834,7 @@ config MXM_WMI
config INTEL_OAKTRAIL
tristate "Intel Oaktrail Platform Extras"
depends on ACPI
depends on ACPI_VIDEO || ACPI_VIDEO = n
depends on RFKILL && BACKLIGHT_CLASS_DEVICE && ACPI
---help---
Intel Oaktrail platform need this driver to provide interfaces to

10
drivers/platform/x86/acer-wmi.c
View File

@ -2246,14 +2246,10 @@ static int __init acer_wmi_init(void)
set_quirks();
if (dmi_check_system(video_vendor_dmi_table))
acpi_video_dmi_promote_vendor();
if (acpi_video_backlight_support()) {
acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
interface->capability &= ~ACER_CAP_BRIGHTNESS;
pr_info("Brightness must be controlled by acpi video driver\n");
} else {
pr_info("Disabling ACPI video driver\n");
acpi_video_unregister_backlight();
}
if (wmi_has_guid(WMID_GUID3)) {
if (ec_raw_mode) {

4
drivers/platform/x86/apple-gmux.c
View File

@ -550,8 +550,7 @@ static int gmux_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
* backlight control and supports more levels than other options.
* Disable the other backlight choices.
*/
acpi_video_dmi_promote_vendor();
acpi_video_unregister();
acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
apple_bl_unregister();
gmux_data->power_state = VGA_SWITCHEROO_ON;
@ -645,7 +644,6 @@ static void gmux_remove(struct pnp_dev *pnp)
apple_gmux_data = NULL;
kfree(gmux_data);
acpi_video_dmi_demote_vendor();
acpi_video_register();
apple_bl_register();
}

6
drivers/platform/x86/asus-laptop.c
View File

@ -54,6 +54,7 @@
#include <linux/slab.h>
#include <linux/dmi.h>
#include <linux/acpi.h>
#include <acpi/video.h>
#define ASUS_LAPTOP_VERSION "0.42"
@ -1884,12 +1885,11 @@ static int asus_acpi_add(struct acpi_device *device)
if (result)
goto fail_platform;
if (!acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
result = asus_backlight_init(asus);
if (result)
goto fail_backlight;
} else
pr_info("Backlight controlled by ACPI video driver\n");
}
result = asus_input_init(asus);
if (result)

15
drivers/platform/x86/asus-wmi.c
View File

@ -1364,7 +1364,7 @@ static void asus_wmi_notify(u32 value, void *context)
code = ASUS_WMI_BRN_DOWN;
if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
if (!acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
asus_wmi_backlight_notify(asus, orig_code);
goto exit;
}
@ -1772,17 +1772,16 @@ static int asus_wmi_add(struct platform_device *pdev)
stop this from showing up */
chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
if (chassis_type && !strcmp(chassis_type, "3"))
acpi_video_dmi_promote_vendor();
acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
if (asus->driver->quirks->wmi_backlight_power)
acpi_video_dmi_promote_vendor();
if (!acpi_video_backlight_support()) {
pr_info("Disabling ACPI video driver\n");
acpi_video_unregister();
acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
err = asus_wmi_backlight_init(asus);
if (err && err != -ENODEV)
goto fail_backlight;
} else
pr_info("Backlight controlled by ACPI video driver\n");
}
status = wmi_install_notify_handler(asus->driver->event_guid,
asus_wmi_notify, asus);

4
drivers/platform/x86/compal-laptop.c
View File

@ -82,7 +82,7 @@
#include <linux/hwmon-sysfs.h>
#include <linux/power_supply.h>
#include <linux/fb.h>
#include <acpi/video.h>
/* ======= */
/* Defines */
@ -959,7 +959,7 @@ static int __init compal_init(void)
return -ENODEV;
}
if (!acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
struct backlight_properties props;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;

8
drivers/platform/x86/dell-laptop.c
View File

@ -31,6 +31,7 @@
#include <linux/slab.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <acpi/video.h>
#include "../../firmware/dcdbas.h"
#define BRIGHTNESS_TOKEN 0x7d
@ -1920,13 +1921,8 @@ static int __init dell_init(void)
debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
&dell_debugfs_fops);
#ifdef CONFIG_ACPI
/* In the event of an ACPI backlight being available, don't
* register the platform controller.
*/
if (acpi_video_backlight_support())
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
return 0;
#endif
get_buffer();
buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);

3
drivers/platform/x86/dell-wmi.c
View File

@ -35,6 +35,7 @@
#include <linux/acpi.h>
#include <linux/string.h>
#include <linux/dmi.h>
#include <acpi/video.h>
MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
@ -397,7 +398,7 @@ static int __init dell_wmi_init(void)
}
dmi_walk(find_hk_type, NULL);
acpi_video = acpi_video_backlight_support();
acpi_video = acpi_video_get_backlight_type() != acpi_backlight_vendor;
err = dell_wmi_input_setup();
if (err)

5
drivers/platform/x86/eeepc-laptop.c
View File

@ -37,6 +37,7 @@
#include <linux/pci_hotplug.h>
#include <linux/leds.h>
#include <linux/dmi.h>
#include <acpi/video.h>
#define EEEPC_LAPTOP_VERSION "0.1"
#define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver"
@ -1433,12 +1434,10 @@ static int eeepc_acpi_add(struct acpi_device *device)
if (result)
goto fail_platform;
if (!acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
result = eeepc_backlight_init(eeepc);
if (result)
goto fail_backlight;
} else {
pr_info("Backlight controlled by ACPI video driver\n");
}
result = eeepc_input_init(eeepc);

6
drivers/platform/x86/fujitsu-laptop.c
View File

@ -72,6 +72,7 @@
#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
#include <linux/leds.h>
#endif
#include <acpi/video.h>
#define FUJITSU_DRIVER_VERSION "0.6.0"
@ -1099,7 +1100,7 @@ static int __init fujitsu_init(void)
/* Register backlight stuff */
if (!acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
struct backlight_properties props;
memset(&props, 0, sizeof(struct backlight_properties));
@ -1137,8 +1138,7 @@ static int __init fujitsu_init(void)
}
/* Sync backlight power status (needs FUJ02E3 device, hence deferred) */
if (!acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
if (call_fext_func(FUNC_BACKLIGHT, 0x2, 0x4, 0x0) == 3)
fujitsu->bl_device->props.power = FB_BLANK_POWERDOWN;
else

3
drivers/platform/x86/ideapad-laptop.c
View File

@ -38,6 +38,7 @@
#include <linux/i8042.h>
#include <linux/dmi.h>
#include <linux/device.h>
#include <acpi/video.h>
#define IDEAPAD_RFKILL_DEV_NUM (3)
@ -903,7 +904,7 @@ static int ideapad_acpi_add(struct platform_device *pdev)
ideapad_sync_rfk_state(priv);
ideapad_sync_touchpad_state(priv);
if (!acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
ret = ideapad_backlight_init(priv);
if (ret && ret != -ENODEV)
goto backlight_failed;

7
drivers/platform/x86/intel_oaktrail.c
View File

@ -50,6 +50,7 @@
#include <linux/platform_device.h>
#include <linux/dmi.h>
#include <linux/rfkill.h>
#include <acpi/video.h>
#define DRIVER_NAME "intel_oaktrail"
#define DRIVER_VERSION "0.4ac1"
@ -343,13 +344,11 @@ static int __init oaktrail_init(void)
goto err_device_add;
}
if (!acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
ret = oaktrail_backlight_init();
if (ret)
goto err_backlight;
} else
pr_info("Backlight controlled by ACPI video driver\n");
}
ret = oaktrail_rfkill_init();
if (ret) {

6
drivers/platform/x86/msi-laptop.c
View File

@ -64,6 +64,7 @@
#include <linux/i8042.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <acpi/video.h>
#define MSI_DRIVER_VERSION "0.5"
@ -1069,9 +1070,8 @@ static int __init msi_init(void)
/* Register backlight stuff */
if (!quirks->old_ec_model || acpi_video_backlight_support()) {
pr_info("Brightness ignored, must be controlled by ACPI video driver\n");
} else {
if (quirks->old_ec_model ||
acpi_video_get_backlight_type() == acpi_backlight_vendor) {
struct backlight_properties props;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;

4
drivers/platform/x86/msi-wmi.c
View File

@ -29,6 +29,7 @@
#include <linux/backlight.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <acpi/video.h>
MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
@ -320,7 +321,8 @@ static int __init msi_wmi_init(void)
break;
}
if (wmi_has_guid(MSIWMI_BIOS_GUID) && !acpi_video_backlight_support()) {
if (wmi_has_guid(MSIWMI_BIOS_GUID) &&
acpi_video_get_backlight_type() == acpi_backlight_vendor) {
err = msi_wmi_backlight_setup();
if (err) {
pr_err("Unable to setup backlight device\n");

27
drivers/platform/x86/samsung-laptop.c
View File

@ -1720,27 +1720,14 @@ static int __init samsung_init(void)
samsung->handle_backlight = true;
samsung->quirks = quirks;
#ifdef CONFIG_ACPI
if (samsung->quirks->broken_acpi_video)
acpi_video_dmi_promote_vendor();
acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
if (samsung->quirks->use_native_backlight)
acpi_video_set_dmi_backlight_type(acpi_backlight_native);
/* Don't handle backlight here if the acpi video already handle it */
if (acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
samsung->handle_backlight = false;
} else if (samsung->quirks->broken_acpi_video) {
pr_info("Disabling ACPI video driver\n");
acpi_video_unregister();
}
if (samsung->quirks->use_native_backlight) {
pr_info("Using native backlight driver\n");
/* Tell acpi-video to not handle the backlight */
acpi_video_dmi_promote_vendor();
acpi_video_unregister();
/* And also do not handle it ourselves */
samsung->handle_backlight = false;
}
#endif
ret = samsung_platform_init(samsung);
@ -1751,12 +1738,6 @@ static int __init samsung_init(void)
if (ret)
goto error_sabi;
#ifdef CONFIG_ACPI
/* Only log that if we are really on a sabi platform */
if (acpi_video_backlight_support())
pr_info("Backlight controlled by ACPI video driver\n");
#endif
ret = samsung_sysfs_init(samsung);
if (ret)
goto error_sysfs;

7
drivers/platform/x86/sony-laptop.c
View File

@ -69,6 +69,7 @@
#include <linux/miscdevice.h>
#endif
#include <asm/uaccess.h>
#include <acpi/video.h>
#define dprintk(fmt, ...) \
do { \
@ -3198,12 +3199,8 @@ static int sony_nc_add(struct acpi_device *device)
sony_nc_function_setup(device, sony_pf_device);
}
/* setup input devices and helper fifo */
if (acpi_video_backlight_support()) {
pr_info("brightness ignored, must be controlled by ACPI video driver\n");
} else {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor)
sony_nc_backlight_setup();
}
/* create sony_pf sysfs attributes related to the SNC device */
for (item = sony_nc_values; item->name; ++item) {

5
drivers/platform/x86/thinkpad_acpi.c
View File

@ -83,6 +83,7 @@
#include <sound/control.h>
#include <sound/initval.h>
#include <asm/uaccess.h>
#include <acpi/video.h>
/* ThinkPad CMOS commands */
#define TP_CMOS_VOLUME_DOWN 0
@ -3487,7 +3488,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
/* Do not issue duplicate brightness change events to
* userspace. tpacpi_detect_brightness_capabilities() must have
* been called before this point */
if (acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
pr_info("This ThinkPad has standard ACPI backlight "
"brightness control, supported by the ACPI "
"video driver\n");
@ -6491,7 +6492,7 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
return 1;
}
if (acpi_video_backlight_support()) {
if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
if (brightness_enable > 1) {
pr_info("Standard ACPI backlight interface "
"available, not loading native one\n");

7
drivers/platform/x86/toshiba_acpi.c
View File

@ -2640,14 +2640,11 @@ static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
*/
if (dev->tr_backlight_supported ||
dmi_check_system(toshiba_vendor_backlight_dmi))
acpi_video_dmi_promote_vendor();
acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
if (acpi_video_backlight_support())
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
return 0;
/* acpi-video may have loaded before we called dmi_promote_vendor() */
acpi_video_unregister_backlight();
memset(&props, 0, sizeof(props));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;

21
include/acpi/video.h
View File

@ -16,23 +16,36 @@ struct acpi_device;
#define ACPI_VIDEO_DISPLAY_LEGACY_PANEL 0x0110
#define ACPI_VIDEO_DISPLAY_LEGACY_TV 0x0200
enum acpi_backlight_type {
acpi_backlight_undef = -1,
acpi_backlight_none = 0,
acpi_backlight_video,
acpi_backlight_vendor,
acpi_backlight_native,
};
#if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE)
extern int acpi_video_register(void);
extern void acpi_video_unregister(void);
extern void acpi_video_unregister_backlight(void);
extern int acpi_video_get_edid(struct acpi_device *device, int type,
int device_id, void **edid);
extern bool acpi_video_verify_backlight_support(void);
extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
#else
static inline int acpi_video_register(void) { return 0; }
static inline void acpi_video_unregister(void) { return; }
static inline void acpi_video_unregister_backlight(void) { return; }
static inline int acpi_video_get_edid(struct acpi_device *device, int type,
int device_id, void **edid)
{
return -ENODEV;
}
static inline bool acpi_video_verify_backlight_support(void) { return false; }
static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
{
return acpi_backlight_vendor;
}
static void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
{
}
#endif
#endif

42
include/linux/acpi.h
View File

@ -253,50 +253,12 @@ extern bool wmi_has_guid(const char *guid);
#define ACPI_VIDEO_OUTPUT_SWITCHING_DMI_VENDOR 0x0400
#define ACPI_VIDEO_OUTPUT_SWITCHING_DMI_VIDEO 0x0800
#if defined(CONFIG_ACPI_VIDEO) || defined(CONFIG_ACPI_VIDEO_MODULE)
extern long acpi_video_get_capabilities(acpi_handle graphics_dev_handle);
extern char acpi_video_backlight_string[];
extern long acpi_is_video_device(acpi_handle handle);
extern void acpi_video_dmi_promote_vendor(void);
extern void acpi_video_dmi_demote_vendor(void);
extern int acpi_video_backlight_support(void);
extern int acpi_video_display_switch_support(void);
#else
static inline long acpi_video_get_capabilities(acpi_handle graphics_dev_handle)
{
return 0;
}
static inline long acpi_is_video_device(acpi_handle handle)
{
return 0;
}
static inline void acpi_video_dmi_promote_vendor(void)
{
}
static inline void acpi_video_dmi_demote_vendor(void)
{
}
static inline int acpi_video_backlight_support(void)
{
return 0;
}
static inline int acpi_video_display_switch_support(void)
{
return 0;
}
#endif /* defined(CONFIG_ACPI_VIDEO) || defined(CONFIG_ACPI_VIDEO_MODULE) */
extern int acpi_blacklisted(void);
extern void acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d);
extern void acpi_osi_setup(char *str);
extern bool acpi_osi_is_win8(void);
#ifdef CONFIG_ACPI_NUMA
int acpi_get_node(acpi_handle handle);