u8 dvi:1;
u8 bios:1;
u8 unknown:1;
- u8 reserved:2;
+ u8 notify:1;
+ u8 reserved:1;
};
struct acpi_video_device_cap {
int level);
static int acpi_video_device_lcd_get_level_current(
struct acpi_video_device *device,
- unsigned long long *level, int init);
+ unsigned long long *level, bool raw);
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,
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))
+ if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false))
return -EINVAL;
for (i = 2; i < vd->brightness->count; i++) {
if (vd->brightness->levels[i] == cur_level)
unsigned long long level;
int offset;
- if (acpi_video_device_lcd_get_level_current(video, &level, 0))
+ if (acpi_video_device_lcd_get_level_current(video, &level, false))
return -EINVAL;
for (offset = 2; offset < video->brightness->count; offset++)
if (level == video->brightness->levels[offset]) {
DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),
},
},
+ {
+ .callback = video_ignore_initial_backlight,
+ .ident = "HP Pavilion dm4",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"),
+ },
+ },
{}
};
+static unsigned long long
+acpi_video_bqc_value_to_level(struct acpi_video_device *device,
+ unsigned long long bqc_value)
+{
+ unsigned long long level;
+
+ if (device->brightness->flags._BQC_use_index) {
+ /*
+ * _BQC returns an index that doesn't account for
+ * the first 2 items with special meaning, so we need
+ * to compensate for that by offsetting ourselves
+ */
+ if (device->brightness->flags._BCL_reversed)
+ bqc_value = device->brightness->count - 3 - bqc_value;
+
+ level = device->brightness->levels[bqc_value + 2];
+ } else {
+ level = bqc_value;
+ }
+
+ level += bqc_offset_aml_bug_workaround;
+
+ return level;
+}
+
static int
acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
- unsigned long long *level, int init)
+ unsigned long long *level, bool raw)
{
acpi_status status = AE_OK;
int i;
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];
-
+ if (raw) {
+ /*
+ * Caller has indicated he wants the raw
+ * value returned by _BQC, so don't furtherly
+ * mess with the value.
+ */
+ return 0;
}
- *level += bqc_offset_aml_bug_workaround;
+
+ *level = acpi_video_bqc_value_to_level(device, *level);
+
for (i = 2; i < device->brightness->count; i++)
if (device->brightness->levels[i] == *level) {
device->brightness->curr = *level;
return 0;
}
- 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;
- }
+ /*
+ * 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?
return *(int *)a - *(int *)b;
}
+/*
+ * Decides if _BQC/_BCQ for this system is usable
+ *
+ * We do this by changing the level first and then read out the current
+ * brightness level, if the value does not match, find out if it is using
+ * index. If not, clear the _BQC/_BCQ capability.
+ */
+static int acpi_video_bqc_quirk(struct acpi_video_device *device,
+ int max_level, int current_level)
+{
+ struct acpi_video_device_brightness *br = device->brightness;
+ int result;
+ unsigned long long level;
+ int test_level;
+
+ /* don't mess with existing known broken systems */
+ if (bqc_offset_aml_bug_workaround)
+ return 0;
+
+ /*
+ * Some systems always report current brightness level as maximum
+ * through _BQC, we need to test another value for them.
+ */
+ test_level = current_level == max_level ? br->levels[2] : max_level;
+
+ result = acpi_video_device_lcd_set_level(device, test_level);
+ if (result)
+ return result;
+
+ result = acpi_video_device_lcd_get_level_current(device, &level, true);
+ if (result)
+ return result;
+
+ if (level != test_level) {
+ /* buggy _BQC found, need to find out if it uses index */
+ if (level < br->count) {
+ if (br->flags._BCL_reversed)
+ level = br->count - 3 - level;
+ if (br->levels[level + 2] == test_level)
+ br->flags._BQC_use_index = 1;
+ }
+
+ if (!br->flags._BQC_use_index)
+ device->cap._BQC = device->cap._BCQ = 0;
+ }
+
+ return 0;
+}
+
+
/*
* Arg:
* device : video output device (LCD, CRT, ..)
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);
+ result = acpi_video_device_lcd_get_level_current(device,
+ &level_old, true);
if (result)
goto out_free_levels;
- result = acpi_video_device_lcd_get_level_current(device, &level, 0);
+ result = acpi_video_bqc_quirk(device, max_level, level_old);
if (result)
goto out_free_levels;
+ /*
+ * cap._BQC may get cleared due to _BQC is found to be broken
+ * in acpi_video_bqc_quirk, so check again here.
+ */
+ if (!device->cap._BQC)
+ goto set_level;
- br->flags._BQC_use_index = (level == max_level ? 0 : 1);
-
- if (!br->flags._BQC_use_index) {
+ if (use_bios_initial_backlight) {
+ level = acpi_video_bqc_value_to_level(device, level_old);
/*
- * 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
+ * On some buggy laptops, _BQC returns an uninitialized
+ * value when invoked for the first time, i.e.
+ * level_old is invalid (no matter whether it's a level
+ * or an index). Set the backlight to max_level in this case.
*/
- if (use_bios_initial_backlight) {
- for (i = 2; i < br->count; i++)
- if (level_old == br->levels[i])
- level = level_old;
- }
- goto set_level;
+ for (i = 2; i < br->count; i++)
+ if (level_old == br->levels[i])
+ break;
+ if (i == br->count)
+ level = max_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)
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;
+ /* Some device omits _ADR, we skip them instead of fail */
+ if (ACPI_FAILURE(status))
+ return 0;
- attribute = acpi_video_get_device_attr(video, device_id);
+ data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
- 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) {
+ 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;
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;
- }
+ acpi_video_device_bind(video, data);
+ acpi_video_device_find_cap(data);
- mutex_lock(&video->device_list_lock);
- list_add_tail(&data->entry, &video->video_device_list);
- mutex_unlock(&video->device_list_lock);
+ status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+ acpi_video_device_notify, data);
+ if (ACPI_FAILURE(status))
+ dev_err(&device->dev, "Error installing notify handler\n");
+ else
+ data->flags.notify = 1;
- return 0;
- }
+ mutex_lock(&video->device_list_lock);
+ list_add_tail(&data->entry, &video->video_device_list);
+ mutex_unlock(&video->device_list_lock);
- return -ENOENT;
+ return status;
}
/*
goto out;
result = acpi_video_device_lcd_get_level_current(device,
- &level_current, 0);
+ &level_current,
+ false);
if (result)
goto out;
status = acpi_video_bus_get_one_device(dev, video);
if (status) {
- printk(KERN_WARNING PREFIX
- "Can't attach device\n");
- continue;
+ dev_err(&dev->dev, "Can't attach device\n");
+ break;
}
}
return 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->flags.notify) {
+ status = acpi_remove_notify_handler(device->dev->handle,
+ ACPI_DEVICE_NOTIFY, acpi_video_device_notify);
+ if (ACPI_FAILURE(status))
+ dev_err(&device->dev->dev,
+ "Can't remove video notify handler\n");
}
+
if (device->backlight) {
backlight_device_unregister(device->backlight);
device->backlight = NULL;
error = acpi_video_bus_get_devices(video, device);
if (error)
- goto err_free_video;
+ goto err_put_video;
video->input = input = input_allocate_device();
if (!input) {
projects / linux-imx.git / blobdiff