mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Hans de Goede](/assets/img/avatar_default.png)
Just like many other Samsung models, the 670Z5E needs to use the acpi-video backlight interface rather then the native one for backlight control to work, add a quirk for this. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1557060 Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
434 lines
12 KiB
C
434 lines
12 KiB
C
/*
|
|
* 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:
|
|
* 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
|
|
*
|
|
* 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.
|
|
*
|
|
* 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 <linux/types.h>
|
|
#include <linux/workqueue.h>
|
|
#include <acpi/video.h>
|
|
|
|
ACPI_MODULE_NAME("video");
|
|
#define _COMPONENT ACPI_VIDEO_COMPONENT
|
|
|
|
void acpi_video_unregister_backlight(void);
|
|
|
|
static bool backlight_notifier_registered;
|
|
static struct notifier_block backlight_nb;
|
|
static struct work_struct backlight_notify_work;
|
|
|
|
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)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static acpi_status
|
|
find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
|
|
{
|
|
long *cap = context;
|
|
struct pci_dev *dev;
|
|
struct acpi_device *acpi_dev;
|
|
|
|
static const struct acpi_device_id video_ids[] = {
|
|
{ACPI_VIDEO_HID, 0},
|
|
{"", 0},
|
|
};
|
|
if (acpi_bus_get_device(handle, &acpi_dev))
|
|
return AE_OK;
|
|
|
|
if (!acpi_match_device_ids(acpi_dev, video_ids)) {
|
|
dev = acpi_get_pci_dev(handle);
|
|
if (!dev)
|
|
return AE_OK;
|
|
pci_dev_put(dev);
|
|
*cap |= acpi_is_video_device(handle);
|
|
}
|
|
return AE_OK;
|
|
}
|
|
|
|
/* Force to use vendor driver when the ACPI device is known to be
|
|
* buggy */
|
|
static int video_detect_force_vendor(const struct dmi_system_id *d)
|
|
{
|
|
acpi_backlight_dmi = acpi_backlight_vendor;
|
|
return 0;
|
|
}
|
|
|
|
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 int video_detect_force_none(const struct dmi_system_id *d)
|
|
{
|
|
acpi_backlight_dmi = acpi_backlight_none;
|
|
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
|
|
* reboot. It's why we should prevent video.ko from being used here
|
|
* and we can't rely on a later call to acpi_video_unregister().
|
|
*/
|
|
{
|
|
.callback = video_detect_force_vendor,
|
|
.ident = "X360",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "X360"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_detect_force_vendor,
|
|
.ident = "Asus UL30VT",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_detect_force_vendor,
|
|
.ident = "Asus UL30A",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"),
|
|
},
|
|
},
|
|
|
|
/*
|
|
* 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"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_detect_force_video,
|
|
.ident = "ThinkPad X201T",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"),
|
|
},
|
|
},
|
|
|
|
/* 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=1557060 */
|
|
.callback = video_detect_force_video,
|
|
.ident = "SAMSUNG 670Z5E",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"),
|
|
},
|
|
},
|
|
{
|
|
/* 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=1272633 */
|
|
.callback = video_detect_force_video,
|
|
.ident = "Dell XPS14 L421X",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"),
|
|
},
|
|
},
|
|
{
|
|
/* 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"),
|
|
},
|
|
},
|
|
{
|
|
/* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */
|
|
.callback = video_detect_force_video,
|
|
.ident = "SAMSUNG 530U4E/540U4E",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
|
|
},
|
|
},
|
|
|
|
/* Non win8 machines which need native backlight nevertheless */
|
|
{
|
|
/* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */
|
|
.callback = video_detect_force_native,
|
|
.ident = "Lenovo Ideapad S405",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
|
|
},
|
|
},
|
|
{
|
|
/* 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"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_detect_force_native,
|
|
.ident = "Dell Vostro V131",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
|
|
},
|
|
},
|
|
{
|
|
/* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */
|
|
.callback = video_detect_force_native,
|
|
.ident = "Dell XPS 17 L702X",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_detect_force_native,
|
|
.ident = "Dell Precision 7510",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
|
|
},
|
|
},
|
|
{
|
|
.callback = video_detect_force_none,
|
|
.ident = "Dell OptiPlex 9020M",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"),
|
|
},
|
|
},
|
|
{ },
|
|
};
|
|
|
|
/* This uses a workqueue to avoid various locking ordering issues */
|
|
static void acpi_video_backlight_notify_work(struct work_struct *work)
|
|
{
|
|
if (acpi_video_get_backlight_type() != acpi_backlight_video)
|
|
acpi_video_unregister_backlight();
|
|
}
|
|
|
|
static int acpi_video_backlight_notify(struct notifier_block *nb,
|
|
unsigned long val, void *bd)
|
|
{
|
|
struct backlight_device *backlight = bd;
|
|
|
|
/* A raw bl registering may change video -> native */
|
|
if (backlight->props.type == BACKLIGHT_RAW &&
|
|
val == BACKLIGHT_REGISTERED)
|
|
schedule_work(&backlight_notify_work);
|
|
|
|
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,
|
|
&video_caps, NULL);
|
|
INIT_WORK(&backlight_notify_work,
|
|
acpi_video_backlight_notify_work);
|
|
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;
|
|
}
|
|
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_get_by_type(BACKLIGHT_RAW))
|
|
return acpi_backlight_native;
|
|
|
|
return acpi_backlight_video;
|
|
}
|
|
EXPORT_SYMBOL(acpi_video_get_backlight_type);
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
|
|
{
|
|
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);
|
|
}
|