forked from Minki/linux
c41c36e900
Currently, changing the brightness of the internal display of the Acer TravelMate 5735Z does not work. Pressing the function keys or changing the slider, GNOME Shell 3.36.2 displays the OSD (five steps), but the brightness does not change. The Acer TravelMate 5735Z shipped with Windows 7 and as such does not trigger our "win8 ready" heuristic for preferring the native backlight interface. Still ACPI backlight control doesn't work on this model, where as the native (intel_video) backlight interface does work by adding `acpi_backlight=native` or `acpi_backlight=none` to Linux’ command line. So, add a quirk to force using native backlight control on this model. Link: https://bugzilla.kernel.org/show_bug.cgi?id=207835 Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
491 lines
14 KiB
C
491 lines
14 KiB
C
/*
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* Copyright (C) 2015 Red Hat Inc.
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* Hans de Goede <hdegoede@redhat.com>
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* Copyright (C) 2008 SuSE Linux Products GmbH
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* Thomas Renninger <trenn@suse.de>
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*
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* May be copied or modified under the terms of the GNU General Public License
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*
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* video_detect.c:
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* After PCI devices are glued with ACPI devices
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* acpi_get_pci_dev() can be called to identify ACPI graphics
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* devices for which a real graphics card is plugged in
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*
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* Depending on whether ACPI graphics extensions (cmp. ACPI spec Appendix B)
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* are available, video.ko should be used to handle the device.
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*
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* Otherwise vendor specific drivers like thinkpad_acpi, asus-laptop,
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* sony_acpi,... can take care about backlight brightness.
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*
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* Backlight drivers can use acpi_video_get_backlight_type() to determine
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* which driver should handle the backlight.
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*
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* If CONFIG_ACPI_VIDEO is neither set as "compiled in" (y) nor as a module (m)
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* this file will not be compiled and acpi_video_get_backlight_type() will
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* always return acpi_backlight_vendor.
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*/
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#include <linux/export.h>
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#include <linux/acpi.h>
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#include <linux/backlight.h>
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#include <linux/dmi.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include <acpi/video.h>
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ACPI_MODULE_NAME("video");
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#define _COMPONENT ACPI_VIDEO_COMPONENT
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void acpi_video_unregister_backlight(void);
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static bool backlight_notifier_registered;
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static struct notifier_block backlight_nb;
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static struct work_struct backlight_notify_work;
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static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef;
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static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef;
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static void acpi_video_parse_cmdline(void)
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{
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if (!strcmp("vendor", acpi_video_backlight_string))
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acpi_backlight_cmdline = acpi_backlight_vendor;
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if (!strcmp("video", acpi_video_backlight_string))
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acpi_backlight_cmdline = acpi_backlight_video;
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if (!strcmp("native", acpi_video_backlight_string))
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acpi_backlight_cmdline = acpi_backlight_native;
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if (!strcmp("none", acpi_video_backlight_string))
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acpi_backlight_cmdline = acpi_backlight_none;
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}
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static acpi_status
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find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
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{
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long *cap = context;
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struct pci_dev *dev;
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struct acpi_device *acpi_dev;
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static const struct acpi_device_id video_ids[] = {
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{ACPI_VIDEO_HID, 0},
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{"", 0},
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};
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if (acpi_bus_get_device(handle, &acpi_dev))
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return AE_OK;
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if (!acpi_match_device_ids(acpi_dev, video_ids)) {
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dev = acpi_get_pci_dev(handle);
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if (!dev)
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return AE_OK;
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pci_dev_put(dev);
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*cap |= acpi_is_video_device(handle);
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}
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return AE_OK;
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}
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/* Force to use vendor driver when the ACPI device is known to be
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* buggy */
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static int video_detect_force_vendor(const struct dmi_system_id *d)
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{
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acpi_backlight_dmi = acpi_backlight_vendor;
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return 0;
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}
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static int video_detect_force_video(const struct dmi_system_id *d)
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{
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acpi_backlight_dmi = acpi_backlight_video;
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return 0;
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}
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static int video_detect_force_native(const struct dmi_system_id *d)
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{
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acpi_backlight_dmi = acpi_backlight_native;
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return 0;
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}
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static int video_detect_force_none(const struct dmi_system_id *d)
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{
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acpi_backlight_dmi = acpi_backlight_none;
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return 0;
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}
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static const struct dmi_system_id video_detect_dmi_table[] = {
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/* On Samsung X360, the BIOS will set a flag (VDRV) if generic
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* ACPI backlight device is used. This flag will definitively break
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* the backlight interface (even the vendor interface) until next
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* reboot. It's why we should prevent video.ko from being used here
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* and we can't rely on a later call to acpi_video_unregister().
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*/
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{
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.callback = video_detect_force_vendor,
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.ident = "X360",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
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DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
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DMI_MATCH(DMI_BOARD_NAME, "X360"),
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},
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},
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{
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.callback = video_detect_force_vendor,
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.ident = "Asus UL30VT",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"),
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},
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},
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{
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.callback = video_detect_force_vendor,
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.ident = "Asus UL30A",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"),
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},
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},
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{
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.callback = video_detect_force_vendor,
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.ident = "Sony VPCEH3U1E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"),
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},
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},
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/*
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* These models have a working acpi_video backlight control, and using
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* native backlight causes a regression where backlight does not work
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* when userspace is not handling brightness key events. Disable
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* native_backlight on these to fix this:
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* https://bugzilla.kernel.org/show_bug.cgi?id=81691
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*/
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{
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.callback = video_detect_force_video,
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.ident = "ThinkPad T420",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
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},
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},
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{
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.callback = video_detect_force_video,
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.ident = "ThinkPad T520",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"),
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},
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},
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{
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.callback = video_detect_force_video,
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.ident = "ThinkPad X201s",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
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},
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},
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{
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.callback = video_detect_force_video,
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.ident = "ThinkPad X201T",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"),
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},
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},
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/* The native backlight controls do not work on some older machines */
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{
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/* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */
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.callback = video_detect_force_video,
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.ident = "HP ENVY 15 Notebook",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"),
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},
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},
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{
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.callback = video_detect_force_video,
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.ident = "SAMSUNG 870Z5E/880Z5E/680Z5E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
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DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"),
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},
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},
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{
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.callback = video_detect_force_video,
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.ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
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DMI_MATCH(DMI_PRODUCT_NAME,
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"370R4E/370R4V/370R5E/3570RE/370R5V"),
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},
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},
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
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.callback = video_detect_force_video,
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.ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
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DMI_MATCH(DMI_PRODUCT_NAME,
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"3570R/370R/470R/450R/510R/4450RV"),
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},
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},
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */
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.callback = video_detect_force_video,
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.ident = "SAMSUNG 670Z5E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
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DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"),
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},
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},
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
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.callback = video_detect_force_video,
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.ident = "SAMSUNG 730U3E/740U3E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
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DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
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},
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},
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{
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/* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
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.callback = video_detect_force_video,
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.ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
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DMI_MATCH(DMI_PRODUCT_NAME,
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"900X3C/900X3D/900X3E/900X4C/900X4D"),
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},
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},
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */
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.callback = video_detect_force_video,
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.ident = "Dell XPS14 L421X",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"),
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},
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},
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
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.callback = video_detect_force_video,
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.ident = "Dell XPS15 L521X",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
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},
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},
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{
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/* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */
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.callback = video_detect_force_video,
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.ident = "SAMSUNG 530U4E/540U4E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
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DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
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},
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},
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/* Non win8 machines which need native backlight nevertheless */
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */
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.callback = video_detect_force_native,
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.ident = "Lenovo Ideapad S405",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
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},
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},
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
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.callback = video_detect_force_native,
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.ident = "Lenovo Ideapad Z570",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
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},
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},
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{
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.callback = video_detect_force_native,
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.ident = "Lenovo E41-25",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_NAME, "81FS"),
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},
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},
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{
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.callback = video_detect_force_native,
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.ident = "Lenovo E41-45",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_NAME, "82BK"),
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},
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},
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
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.callback = video_detect_force_native,
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.ident = "Apple MacBook Pro 12,1",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
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},
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},
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{
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.callback = video_detect_force_native,
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.ident = "Dell Vostro V131",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
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},
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},
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{
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/* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */
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.callback = video_detect_force_native,
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.ident = "Dell XPS 17 L702X",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
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},
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},
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{
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.callback = video_detect_force_native,
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.ident = "Dell Precision 7510",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
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},
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},
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{
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.callback = video_detect_force_native,
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.ident = "Acer Aspire 5738z",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"),
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DMI_MATCH(DMI_BOARD_NAME, "JV50"),
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},
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},
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{
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/* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */
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.callback = video_detect_force_native,
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.ident = "Acer TravelMate 5735Z",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
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DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"),
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DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"),
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},
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},
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/*
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* Desktops which falsely report a backlight and which our heuristics
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* for this do not catch.
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*/
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{
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.callback = video_detect_force_none,
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.ident = "Dell OptiPlex 9020M",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"),
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},
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},
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{
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.callback = video_detect_force_none,
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.ident = "MSI MS-7721",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
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DMI_MATCH(DMI_PRODUCT_NAME, "MS-7721"),
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},
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},
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{ },
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};
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/* This uses a workqueue to avoid various locking ordering issues */
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static void acpi_video_backlight_notify_work(struct work_struct *work)
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{
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if (acpi_video_get_backlight_type() != acpi_backlight_video)
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acpi_video_unregister_backlight();
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}
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static int acpi_video_backlight_notify(struct notifier_block *nb,
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unsigned long val, void *bd)
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{
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struct backlight_device *backlight = bd;
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/* A raw bl registering may change video -> native */
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if (backlight->props.type == BACKLIGHT_RAW &&
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val == BACKLIGHT_REGISTERED)
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schedule_work(&backlight_notify_work);
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return NOTIFY_OK;
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}
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/*
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* Determine which type of backlight interface to use on this system,
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* First check cmdline, then dmi quirks, then do autodetect.
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*
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* The autodetect order is:
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* 1) Is the acpi-video backlight interface supported ->
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* no, use a vendor interface
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* 2) Is this a win8 "ready" BIOS and do we have a native interface ->
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* yes, use a native interface
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* 3) Else use the acpi-video interface
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*
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* Arguably the native on win8 check should be done first, but that would
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* be a behavior change, which may causes issues.
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*/
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enum acpi_backlight_type acpi_video_get_backlight_type(void)
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{
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static DEFINE_MUTEX(init_mutex);
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static bool init_done;
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static long video_caps;
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/* Parse cmdline, dmi and acpi only once */
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mutex_lock(&init_mutex);
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if (!init_done) {
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acpi_video_parse_cmdline();
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dmi_check_system(video_detect_dmi_table);
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acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, find_video, NULL,
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&video_caps, NULL);
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INIT_WORK(&backlight_notify_work,
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acpi_video_backlight_notify_work);
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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);
|
|
}
|