* 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 <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"
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 disable_backlight_sysfs_if = -1;
+module_param(disable_backlight_sysfs_if, int, 0444);
-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 bool device_id_scheme = false;
+module_param(device_id_scheme, bool, 0444);
+
+static bool only_lcd = false;
+module_param(only_lcd, bool, 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},
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;
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 {
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)
{
*/
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)
+{
+ if (disable_backlight_sysfs_if == -1)
+ disable_backlight_sysfs_if = 1;
+ return 0;
+}
+
+static int video_set_device_id_scheme(const struct dmi_system_id *d)
{
- use_native_backlight_dmi = NATIVE_BACKLIGHT_OFF;
+ device_id_scheme = true;
return 0;
}
-static int __init video_enable_native_backlight(const struct dmi_system_id *d)
+static int video_enable_only_lcd(const struct dmi_system_id *d)
{
- use_native_backlight_dmi = NATIVE_BACKLIGHT_ON;
+ only_lcd = true;
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
*/
},
/*
- * 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://bugzilla.kernel.org/show_bug.cgi?id=21012 */
+ .callback = video_disable_backlight_sysfs_if,
+ .ident = "Toshiba Portege R700",
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"),
},
},
{
- .callback = video_disable_native_backlight,
- .ident = "ThinkPad T520",
+ /* 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 T520"),
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R830"),
},
},
{
- .callback = video_disable_native_backlight,
- .ident = "ThinkPad X201s",
+ /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */
+ .callback = video_disable_backlight_sysfs_if,
+ .ident = "Toshiba Satellite R830",
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE R830"),
},
},
-
- /* 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"),
- },
- },
-
+ /*
+ * Some machine's _DOD IDs don't have bit 31(Device ID Scheme) set
+ * but the IDs actually follow the Device ID Scheme.
+ */
{
- /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
- .callback = video_disable_native_backlight,
- .ident = "Dell XPS15 L521X",
+ /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */
+ .callback = video_set_device_id_scheme,
+ .ident = "ESPRIMO Mobile M9410",
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
+ DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"),
},
},
-
- /* Non win8 machines which need native backlight nevertheless */
+ /*
+ * Some machines have multiple video output devices, but only the one
+ * that is the type of LCD can do the backlight control so we should not
+ * register backlight interface for other video output devices.
+ */
{
- /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
- .callback = video_enable_native_backlight,
- .ident = "Lenovo Ideapad Z570",
+ /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */
+ .callback = video_enable_only_lcd,
+ .ident = "ESPRIMO Mobile M9410",
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
+ DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"),
},
},
{}
attribute = acpi_video_get_device_attr(video, device_id);
- if (attribute && attribute->device_id_scheme) {
+ if (attribute && (attribute->device_id_scheme || device_id_scheme)) {
switch (attribute->display_type) {
case ACPI_VIDEO_DISPLAY_CRT:
data->flags.crt = 1;
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)
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;
static int count;
char *name;
- /*
- * Do not create backlight device for video output
- * device that is not in the enumerated list.
- */
- if (!acpi_video_device_in_dod(device)) {
- dev_dbg(&device->dev->dev, "not in _DOD list, ignore\n");
- return;
- }
-
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;
&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
mutex_unlock(&video->device_list_lock);
}
+static bool acpi_video_should_register_backlight(struct acpi_video_device *dev)
+{
+ /*
+ * Do not create backlight device for video output
+ * device that is not in the enumerated list.
+ */
+ if (!acpi_video_device_in_dod(dev)) {
+ dev_dbg(&dev->dev->dev, "not in _DOD list, ignore\n");
+ return false;
+ }
+
+ if (only_lcd)
+ return dev->flags.lcd;
+ return true;
+}
+
static int acpi_video_bus_register_backlight(struct acpi_video_bus *video)
{
struct acpi_video_device *dev;
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);
- list_for_each_entry(dev, &video->video_device_list, entry)
- acpi_video_dev_register_backlight(dev);
+ list_for_each_entry(dev, &video->video_device_list, entry) {
+ if (acpi_video_should_register_backlight(dev))
+ acpi_video_dev_register_backlight(dev);
+ }
mutex_unlock(&video->device_list_lock);
video->backlight_registered = true;
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;
acpi_video_bus_register_backlight(video);
acpi_video_bus_add_notify_handler(video);
- acpi_video_bus_add_backlight_notify_handler(video);
return 0;
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);
int acpi_video_register(void)
{
- int ret;
+ int ret = 0;
+ mutex_lock(®ister_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
*/
register_count = 1;
- return 0;
+leave:
+ mutex_unlock(®ister_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(®ister_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(®ister_count_mutex);
}
EXPORT_SYMBOL(acpi_video_unregister);
{
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(®ister_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(®ister_count_mutex);
}
-EXPORT_SYMBOL(acpi_video_unregister_backlight);
/*
* This is kind of nasty. Hardware using Intel chipsets may require
if (acpi_disabled)
return 0;
- dmi_check_system(video_dmi_table);
-
if (intel_opregion_present())
return 0;
static void __exit acpi_video_exit(void)
{
+ acpi_video_detect_exit();
acpi_video_unregister();
return;
Code Review / kvmfornfv.git / blobdiff