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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-10-28 01:20:14 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-10-28 01:20:14 +0100
commit975bcabb05436d8b99214a2293d1d5b9c0b0ca08 (patch)
treea3c1049d5029ed6726ec4135ca18b4d9595d2b55 /drivers/platform
parentdd6c26be3bb3e98d4811780f831bbc246dae54c8 (diff)
parent1bdb71af7f1388fd4b305134035008a81f2032b8 (diff)
Merge branch 'acpi-video'
* acpi-video: ACPI: Add Toshiba NB100 to Vista _OSI blacklist ACPI / video: Ignore BIOS initial backlight value for HP 250 G1 ACPI / video: Add Lenovo IdeaPad Yoga 13 to acpi video detect blacklist thinkpad-acpi: fix handle locate for video and query of _BCL ACPI / video: Do not register backlight if win8 and native interface exists ACPI / video: seperate backlight control and event interface backlight: introduce backlight_device_registered ACPI: add missing win8 OSI comment to blacklist ACPI: update win8 OSI blacklist
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/thinkpad_acpi.c31
1 files changed, 24 insertions, 7 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 03ca6c139f1..170f2788ee6 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -700,6 +700,14 @@ static void __init drv_acpi_handle_init(const char *name,
static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
u32 level, void *context, void **return_value)
{
+ struct acpi_device *dev;
+ if (!strcmp(context, "video")) {
+ if (acpi_bus_get_device(handle, &dev))
+ return AE_OK;
+ if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
+ return AE_OK;
+ }
+
*(acpi_handle *)return_value = handle;
return AE_CTRL_TERMINATE;
@@ -712,10 +720,10 @@ static void __init tpacpi_acpi_handle_locate(const char *name,
acpi_status status;
acpi_handle device_found;
- BUG_ON(!name || !hid || !handle);
+ BUG_ON(!name || !handle);
vdbg_printk(TPACPI_DBG_INIT,
"trying to locate ACPI handle for %s, using HID %s\n",
- name, hid);
+ name, hid ? hid : "NULL");
memset(&device_found, 0, sizeof(device_found));
status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
@@ -6090,19 +6098,28 @@ static int __init tpacpi_query_bcl_levels(acpi_handle handle)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
+ struct acpi_device *device, *child;
int rc;
- if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
+ if (acpi_bus_get_device(handle, &device))
+ return 0;
+
+ rc = 0;
+ list_for_each_entry(child, &device->children, node) {
+ acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
+ NULL, &buffer);
+ if (ACPI_FAILURE(status))
+ continue;
+
obj = (union acpi_object *)buffer.pointer;
if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
pr_err("Unknown _BCL data, please report this to %s\n",
- TPACPI_MAIL);
+ TPACPI_MAIL);
rc = 0;
} else {
rc = obj->package.count;
}
- } else {
- return 0;
+ break;
}
kfree(buffer.pointer);
@@ -6118,7 +6135,7 @@ static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
acpi_handle video_device;
int bcl_levels = 0;
- tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
+ tpacpi_acpi_handle_locate("video", NULL, &video_device);
if (video_device)
bcl_levels = tpacpi_query_bcl_levels(video_device);