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Diffstat (limited to 'drivers/acpi/video.c')
-rw-r--r--drivers/acpi/video.c105
1 files changed, 70 insertions, 35 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 6e9b49149fce..a0c93b321482 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -39,10 +39,12 @@
#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>
#define PREFIX "ACPI: "
@@ -88,7 +90,6 @@ module_param(allow_duplicates, 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 int acpi_video_resume(struct acpi_device *device);
static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
static const struct acpi_device_id video_device_ids[] = {
@@ -104,7 +105,6 @@ static struct acpi_driver acpi_video_bus = {
.ops = {
.add = acpi_video_bus_add,
.remove = acpi_video_bus_remove,
- .resume = acpi_video_resume,
.notify = acpi_video_bus_notify,
},
};
@@ -159,6 +159,7 @@ struct acpi_video_bus {
struct proc_dir_entry *dir;
struct input_dev *input;
char phys[32]; /* for input device */
+ struct notifier_block pm_nb;
};
struct acpi_video_device_flags {
@@ -327,7 +328,7 @@ 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);
+ 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,
@@ -345,7 +346,7 @@ static int acpi_video_get_brightness(struct backlight_device *bd)
struct acpi_video_device *vd =
(struct acpi_video_device *)bl_get_data(bd);
- if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
+ 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)
@@ -414,7 +415,7 @@ static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsig
unsigned long long level;
int offset;
- if (acpi_video_device_lcd_get_level_current(video, &level))
+ 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]) {
@@ -609,7 +610,7 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
static int
acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
- unsigned long long *level)
+ unsigned long long *level, int init)
{
acpi_status status = AE_OK;
int i;
@@ -633,10 +634,16 @@ acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
device->brightness->curr = *level;
return 0;
}
- /* BQC returned an invalid level. Stop using it. */
- ACPI_WARNING((AE_INFO, "%s returned an invalid level",
- buf));
- device->cap._BQC = device->cap._BCQ = 0;
+ 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?
@@ -892,7 +899,7 @@ acpi_video_init_brightness(struct acpi_video_device *device)
if (!device->cap._BQC)
goto set_level;
- result = acpi_video_device_lcd_get_level_current(device, &level_old);
+ result = acpi_video_device_lcd_get_level_current(device, &level_old, 1);
if (result)
goto out_free_levels;
@@ -903,7 +910,7 @@ acpi_video_init_brightness(struct acpi_video_device *device)
if (result)
goto out_free_levels;
- result = acpi_video_device_lcd_get_level_current(device, &level);
+ result = acpi_video_device_lcd_get_level_current(device, &level, 0);
if (result)
goto out_free_levels;
@@ -992,6 +999,7 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
}
if (acpi_video_backlight_support()) {
+ struct backlight_properties props;
int result;
static int count = 0;
char *name;
@@ -1004,12 +1012,21 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
return;
sprintf(name, "acpi_video%d", count++);
- device->backlight = backlight_device_register(name,
- NULL, device, &acpi_backlight_ops);
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = device->brightness->count - 3;
+ device->backlight = backlight_device_register(name, NULL, device,
+ &acpi_backlight_ops,
+ &props);
kfree(name);
if (IS_ERR(device->backlight))
return;
- device->backlight->props.max_brightness = device->brightness->count-3;
+
+ /*
+ * 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);
result = sysfs_create_link(&device->backlight->dev.kobj,
&device->dev->dev.kobj, "device");
@@ -1996,7 +2013,7 @@ acpi_video_switch_brightness(struct acpi_video_device *device, int event)
goto out;
result = acpi_video_device_lcd_get_level_current(device,
- &level_current);
+ &level_current, 0);
if (result)
goto out;
@@ -2113,7 +2130,7 @@ 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;
+ int keycode = 0;
if (!video)
return;
@@ -2149,17 +2166,19 @@ static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
break;
default:
- keycode = KEY_UNKNOWN;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
acpi_notifier_call_chain(device, event, 0);
- input_report_key(input, keycode, 1);
- input_sync(input);
- input_report_key(input, keycode, 0);
- input_sync(input);
+
+ if (keycode) {
+ input_report_key(input, keycode, 1);
+ input_sync(input);
+ input_report_key(input, keycode, 0);
+ input_sync(input);
+ }
return;
}
@@ -2170,7 +2189,7 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
struct acpi_device *device = NULL;
struct acpi_video_bus *bus;
struct input_dev *input;
- int keycode;
+ int keycode = 0;
if (!video_device)
return;
@@ -2211,39 +2230,48 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
keycode = KEY_DISPLAY_OFF;
break;
default:
- keycode = KEY_UNKNOWN;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
acpi_notifier_call_chain(device, event, 0);
- input_report_key(input, keycode, 1);
- input_sync(input);
- input_report_key(input, keycode, 0);
- input_sync(input);
+
+ if (keycode) {
+ input_report_key(input, keycode, 1);
+ input_sync(input);
+ input_report_key(input, keycode, 0);
+ input_sync(input);
+ }
return;
}
-static int instance;
-static int acpi_video_resume(struct acpi_device *device)
+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;
- if (!device || !acpi_driver_data(device))
- return -EINVAL;
+ switch (val) {
+ case PM_HIBERNATION_PREPARE:
+ case PM_SUSPEND_PREPARE:
+ case PM_RESTORE_PREPARE:
+ return NOTIFY_DONE;
+ }
- video = acpi_driver_data(device);
+ 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 AE_OK;
+
+ return NOTIFY_OK;
}
static acpi_status
@@ -2267,6 +2295,8 @@ acpi_video_bus_match(acpi_handle handle, u32 level, void *context,
return AE_OK;
}
+static int instance;
+
static int acpi_video_bus_add(struct acpi_device *device)
{
struct acpi_video_bus *video;
@@ -2348,7 +2378,6 @@ static int acpi_video_bus_add(struct acpi_device *device)
set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
set_bit(KEY_DISPLAY_OFF, input->keybit);
- set_bit(KEY_UNKNOWN, input->keybit);
error = input_register_device(input);
if (error)
@@ -2360,6 +2389,10 @@ static int acpi_video_bus_add(struct acpi_device *device)
video->flags.rom ? "yes" : "no",
video->flags.post ? "yes" : "no");
+ video->pm_nb.notifier_call = acpi_video_resume;
+ video->pm_nb.priority = 0;
+ register_pm_notifier(&video->pm_nb);
+
return 0;
err_free_input_dev:
@@ -2386,6 +2419,8 @@ static int acpi_video_bus_remove(struct acpi_device *device, int type)
video = acpi_driver_data(device);
+ unregister_pm_notifier(&video->pm_nb);
+
acpi_video_bus_stop_devices(video);
acpi_video_bus_put_devices(video);
acpi_video_bus_remove_fs(device);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 14:09:23 +0100