diff options
Diffstat (limited to 'drivers/acpi/video_detect.c')
| -rw-r--r-- | drivers/acpi/video_detect.c | 1185 |
1 files changed, 977 insertions, 208 deletions
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index e6bd910bc6ed..4cf74f173c78 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -1,125 +1,78 @@ /* + * 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: - * Provides acpi_is_video_device() for early scanning of ACPI devices in scan.c - * There a Linux specific (Spec does not provide a HID for video devices) is - * assigned - * * 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 * - * Now acpi_video_get_capabilities() can be called to check which - * capabilities the graphics cards plugged in support. The check for general - * video capabilities will be triggered by the first caller of - * acpi_video_get_capabilities(NULL); which will happen when the first - * backlight switching supporting driver calls: - * acpi_video_backlight_support(); - * * 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. * - * If CONFIG_ACPI_VIDEO is neither set as "compiled in" (y) nor as a module (m) - * this file will not be compiled, acpi_video_get_capabilities() and - * acpi_video_backlight_support() will always return 0 and vendor specific - * drivers always can handle backlight. + * Backlight drivers can use acpi_video_get_backlight_type() to determine which + * driver should handle the backlight. RAW/GPU-driver backlight drivers must + * use the acpi_video_backlight_use_native() helper for this. * + * 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/apple-gmux.h> +#include <linux/backlight.h> #include <linux/dmi.h> +#include <linux/module.h> #include <linux/pci.h> +#include <linux/platform_data/x86/nvidia-wmi-ec-backlight.h> +#include <linux/pnp.h> +#include <linux/types.h> +#include <linux/workqueue.h> +#include <acpi/video.h> -#define PREFIX "ACPI: " +static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef; +static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef; -ACPI_MODULE_NAME("video"); -#define _COMPONENT ACPI_VIDEO_COMPONENT - -static long acpi_video_support; -static bool acpi_video_caps_checked; - -static acpi_status -acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context, - void **retyurn_value) +static void acpi_video_parse_cmdline(void) { - long *cap = context; - acpi_handle h_dummy; - - if (ACPI_SUCCESS(acpi_get_handle(handle, "_BCM", &h_dummy)) && - ACPI_SUCCESS(acpi_get_handle(handle, "_BCL", &h_dummy))) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight " - "support\n")); - *cap |= ACPI_VIDEO_BACKLIGHT; - if (ACPI_FAILURE(acpi_get_handle(handle, "_BQC", &h_dummy))) - printk(KERN_WARNING FW_BUG PREFIX "No _BQC method, " - "cannot determine initial brightness\n"); - /* We have backlight support, no need to scan further */ - return AE_CTRL_TERMINATE; - } - return 0; -} - -/* Returns true if the ACPI object is a video device which can be - * handled by video.ko. - * The device will get a Linux specific CID added in scan.c to - * identify the device as an ACPI graphics device - * Be aware that the graphics device may not be physically present - * Use acpi_video_get_capabilities() to detect general ACPI video - * capabilities of present cards - */ -long acpi_is_video_device(acpi_handle handle) -{ - acpi_handle h_dummy; - long video_caps = 0; - - /* Is this device able to support video switching ? */ - if (ACPI_SUCCESS(acpi_get_handle(handle, "_DOD", &h_dummy)) || - ACPI_SUCCESS(acpi_get_handle(handle, "_DOS", &h_dummy))) - video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING; - - /* Is this device able to retrieve a video ROM ? */ - if (ACPI_SUCCESS(acpi_get_handle(handle, "_ROM", &h_dummy))) - video_caps |= ACPI_VIDEO_ROM_AVAILABLE; - - /* Is this device able to configure which video head to be POSTed ? */ - if (ACPI_SUCCESS(acpi_get_handle(handle, "_VPO", &h_dummy)) && - ACPI_SUCCESS(acpi_get_handle(handle, "_GPD", &h_dummy)) && - ACPI_SUCCESS(acpi_get_handle(handle, "_SPD", &h_dummy))) - video_caps |= ACPI_VIDEO_DEVICE_POSTING; - - /* Only check for backlight functionality if one of the above hit. */ - if (video_caps) - acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, - ACPI_UINT32_MAX, acpi_backlight_cap_match, NULL, - &video_caps, NULL); - - return video_caps; + 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("nvidia_wmi_ec", acpi_video_backlight_string)) + acpi_backlight_cmdline = acpi_backlight_nvidia_wmi_ec; + if (!strcmp("apple_gmux", acpi_video_backlight_string)) + acpi_backlight_cmdline = acpi_backlight_apple_gmux; + if (!strcmp("dell_uart", acpi_video_backlight_string)) + acpi_backlight_cmdline = acpi_backlight_dell_uart; + if (!strcmp("none", acpi_video_backlight_string)) + acpi_backlight_cmdline = acpi_backlight_none; } -EXPORT_SYMBOL(acpi_is_video_device); static acpi_status find_video(acpi_handle handle, u32 lvl, void *context, void **rv) { + struct acpi_device *acpi_dev = acpi_fetch_acpi_dev(handle); long *cap = context; struct pci_dev *dev; - struct acpi_device *acpi_dev; - const struct acpi_device_id video_ids[] = { + 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)) { + if (acpi_dev && !acpi_match_device_ids(acpi_dev, video_ids)) { dev = acpi_get_pci_dev(handle); if (!dev) return AE_OK; @@ -129,171 +82,987 @@ find_video(acpi_handle handle, u32 lvl, void *context, void **rv) return AE_OK; } +/* This depends on ACPI_WMI which is X86 only */ +#ifdef CONFIG_X86 +static bool nvidia_wmi_ec_supported(void) +{ + struct wmi_brightness_args args = { + .mode = WMI_BRIGHTNESS_MODE_GET, + .val = 0, + .ret = 0, + }; + struct acpi_buffer buf = { (acpi_size)sizeof(args), &args }; + acpi_status status; + + status = wmi_evaluate_method(WMI_BRIGHTNESS_GUID, 0, + WMI_BRIGHTNESS_METHOD_SOURCE, &buf, &buf); + if (ACPI_FAILURE(status)) + return false; + + /* + * If brightness is handled by the EC then nvidia-wmi-ec-backlight + * should be used, else the GPU driver(s) should be used. + */ + return args.ret == WMI_BRIGHTNESS_SOURCE_EC; +} +#else +static bool nvidia_wmi_ec_supported(void) +{ + return false; +} +#endif + /* 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_video_support |= ACPI_VIDEO_BACKLIGHT_DMI_VENDOR; + 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 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(). +static int video_detect_portege_r100(const struct dmi_system_id *d) +{ + struct pci_dev *dev; + /* Search for Trident CyberBlade XP4m32 to confirm Portégé R100 */ + dev = pci_get_device(PCI_VENDOR_ID_TRIDENT, 0x2100, NULL); + if (dev) + acpi_backlight_dmi = acpi_backlight_vendor; + return 0; +} + +static const struct dmi_system_id video_detect_dmi_table[] = { + /* + * Models which should use the vendor backlight interface, + * because of broken ACPI video backlight control. */ { + /* https://bugzilla.redhat.com/show_bug.cgi?id=1128309 */ .callback = video_detect_force_vendor, - .ident = "X360", + /* Acer KAV80 */ .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), - DMI_MATCH(DMI_PRODUCT_NAME, "X360"), - DMI_MATCH(DMI_BOARD_NAME, "X360"), + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"), }, }, { - .callback = video_detect_force_vendor, - .ident = "Asus UL30VT", - .matches = { + .callback = video_detect_force_vendor, + /* 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 = { + .callback = video_detect_force_vendor, + /* Asus UL30A */ + .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"), }, }, - { }, -}; + { + .callback = video_detect_force_vendor, + /* Asus X55U */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "X55U"), + }, + }, + { + /* https://bugs.launchpad.net/bugs/1000146 */ + .callback = video_detect_force_vendor, + /* Asus X101CH */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"), + }, + }, + { + .callback = video_detect_force_vendor, + /* Asus X401U */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "X401U"), + }, + }, + { + .callback = video_detect_force_vendor, + /* Asus X501U */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "X501U"), + }, + }, + { + /* https://bugs.launchpad.net/bugs/1000146 */ + .callback = video_detect_force_vendor, + /* Asus 1015CX */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"), + }, + }, + { + .callback = video_detect_force_vendor, + /* Samsung N150/N210/N220 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"), + DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"), + }, + }, + { + .callback = video_detect_force_vendor, + /* Samsung NF110/NF210/NF310 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"), + DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"), + }, + }, + { + .callback = video_detect_force_vendor, + /* Samsung NC210 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"), + DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"), + }, + }, -/* - * Returns the video capabilities of a specific ACPI graphics device - * - * if NULL is passed as argument all ACPI devices are enumerated and - * all graphics capabilities of physically present devices are - * summarized and returned. This is cached and done only once. - */ -long acpi_video_get_capabilities(acpi_handle graphics_handle) -{ - long caps = 0; - struct acpi_device *tmp_dev; - acpi_status status; + /* + * Models which should use the vendor backlight interface, + * because of broken native backlight control. + */ + { + .callback = video_detect_force_vendor, + /* Sony Vaio PCG-FRV35 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), + DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"), + }, + }, + { + .callback = video_detect_force_vendor, + /* Panasonic Toughbook CF-18 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Matsushita Electric Industrial"), + DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"), + }, + }, - if (acpi_video_caps_checked && graphics_handle == NULL) - return acpi_video_support; + /* + * Toshiba models with Transflective display, these need to use + * the toshiba_acpi vendor driver for proper Transflective handling. + */ + { + .callback = video_detect_force_vendor, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R500"), + }, + }, + { + .callback = video_detect_force_vendor, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R600"), + }, + }, - if (!graphics_handle) { - /* Only do the global walk through all graphics devices once */ - acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, find_video, NULL, - &caps, NULL); - /* There might be boot param flags set already... */ - acpi_video_support |= caps; - acpi_video_caps_checked = 1; - /* Add blacklists here. Be careful to use the right *DMI* bits - * to still be able to override logic via boot params, e.g.: - * - * if (dmi_name_in_vendors("XY")) { - * acpi_video_support |= - * ACPI_VIDEO_BACKLIGHT_DMI_VENDOR; - *} - */ + /* + * Toshiba Portégé R100 has working both acpi_video and toshiba_acpi + * vendor driver. But none of them gets activated as it has a VGA with + * no kernel driver (Trident CyberBlade XP4m32). + * The DMI strings are generic so check for the VGA chip in callback. + */ + { + .callback = video_detect_portege_r100, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), + DMI_MATCH(DMI_BOARD_NAME, "Portable PC") + }, + }, - dmi_check_system(video_detect_dmi_table); - } else { - status = acpi_bus_get_device(graphics_handle, &tmp_dev); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Invalid device")); - return 0; - } - acpi_walk_namespace(ACPI_TYPE_DEVICE, graphics_handle, - ACPI_UINT32_MAX, find_video, NULL, - &caps, NULL); - } - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "We have 0x%lX video support %s %s\n", - graphics_handle ? caps : acpi_video_support, - graphics_handle ? "on device " : "in general", - graphics_handle ? acpi_device_bid(tmp_dev) : "")); - return caps; -} -EXPORT_SYMBOL(acpi_video_get_capabilities); + /* + * Models which need acpi_video backlight control where the GPU drivers + * do not call acpi_video_register_backlight() because no internal panel + * is detected. Typically these are all-in-ones (monitors with builtin + * PC) where the panel connection shows up as regular DP instead of eDP. + */ + { + .callback = video_detect_force_video, + /* Apple iMac14,1 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,1"), + }, + }, + { + .callback = video_detect_force_video, + /* Apple iMac14,2 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,2"), + }, + }, -static void acpi_video_caps_check(void) -{ /* - * We must check whether the ACPI graphics device is physically plugged - * in. Therefore this must be called after binding PCI and ACPI devices + * 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 */ - if (!acpi_video_caps_checked) - acpi_video_get_capabilities(NULL); -} + { + .callback = video_detect_force_video, + /* ThinkPad T420 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"), + }, + }, + { + .callback = video_detect_force_video, + /* ThinkPad T520 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"), + }, + }, + { + .callback = video_detect_force_video, + /* ThinkPad X201s */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), + }, + }, + { + .callback = video_detect_force_video, + /* ThinkPad X201T */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"), + }, + }, -/* Promote the vendor interface instead of the generic video module. - * This function allow DMI blacklists to be implemented by externals - * platform drivers instead of putting a big blacklist in video_detect.c - * After calling this function you will probably want to call - * acpi_video_unregister() to make sure the video module is not loaded - */ -void acpi_video_dmi_promote_vendor(void) -{ - acpi_video_caps_check(); - acpi_video_support |= ACPI_VIDEO_BACKLIGHT_DMI_VENDOR; -} -EXPORT_SYMBOL(acpi_video_dmi_promote_vendor); + /* 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, + /* 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, + /* 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, + /* 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, + /* 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, + /* 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, + /* 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, + /* 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, + /* 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, + /* 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, + /* SAMSUNG 530U4E/540U4E */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"), + }, + }, + { + /* https://bugs.launchpad.net/bugs/1894667 */ + .callback = video_detect_force_video, + /* HP 635 Notebook */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"), + }, + }, -/* To be called when a driver who previously promoted the vendor - * interface */ -void acpi_video_dmi_demote_vendor(void) + /* Non win8 machines which need native backlight nevertheless */ + { + /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */ + .callback = video_detect_force_native, + /* Lenovo Ideapad S405 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"), + }, + }, + { + /* https://bugzilla.suse.com/show_bug.cgi?id=1208724 */ + .callback = video_detect_force_native, + /* Lenovo Ideapad Z470 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad Z470"), + }, + }, + { + /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */ + .callback = video_detect_force_native, + /* Lenovo Ideapad Z570 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"), + }, + }, + { + .callback = video_detect_force_native, + /* Lenovo E41-25 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "81FS"), + }, + }, + { + .callback = video_detect_force_native, + /* Lenovo E41-45 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "82BK"), + }, + }, + { + .callback = video_detect_force_native, + /* Lenovo Slim 7 16ARH7 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "82UX"), + }, + }, + { + .callback = video_detect_force_native, + /* Lenovo ThinkPad X131e (3371 AMD version) */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "3371"), + }, + }, + { + .callback = video_detect_force_native, + /* Apple iMac11,3 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "iMac11,3"), + }, + }, + { + /* https://gitlab.freedesktop.org/drm/amd/-/issues/1838 */ + .callback = video_detect_force_native, + /* Apple iMac12,1 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,1"), + }, + }, + { + /* https://gitlab.freedesktop.org/drm/amd/-/issues/2753 */ + .callback = video_detect_force_native, + /* Apple iMac12,2 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,2"), + }, + }, + { + .callback = video_detect_force_native, + /* Apple MacBook Air 7,2 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir7,2"), + }, + }, + { + .callback = video_detect_force_native, + /* Apple MacBook Air 9,1 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir9,1"), + }, + }, + { + .callback = video_detect_force_native, + /* Apple MacBook Pro 9,2 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,2"), + }, + }, + { + .callback = video_detect_force_native, + /* Apple MacBook Pro 11,2 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro11,2"), + }, + }, + { + /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */ + .callback = video_detect_force_native, + /* 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, + /* Apple MacBook Pro 16,2 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,2"), + }, + }, + { + .callback = video_detect_force_native, + /* Dell Inspiron N4010 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N4010"), + }, + }, + { + .callback = video_detect_force_native, + /* 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, + /* 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, + /* Dell Precision 7510 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"), + }, + }, + { + .callback = video_detect_force_native, + /* Dell Studio 1569 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1569"), + }, + }, + { + .callback = video_detect_force_native, + /* Acer Aspire 3830TG */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3830TG"), + }, + }, + { + .callback = video_detect_force_native, + /* Acer Aspire 4810T */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"), + }, + }, + { + .callback = video_detect_force_native, + /* Acer Aspire 5738z */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"), + DMI_MATCH(DMI_BOARD_NAME, "JV50"), + }, + }, + { + /* https://bugzilla.redhat.com/show_bug.cgi?id=1012674 */ + .callback = video_detect_force_native, + /* Acer Aspire 5741 */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"), + }, + }, + { + /* https://bugzilla.kernel.org/show_bug.cgi?id=42993 */ + .callback = video_detect_force_native, + /* Acer Aspire 5750 */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"), + }, + }, + { + /* https://bugzilla.kernel.org/show_bug.cgi?id=42833 */ + .callback = video_detect_force_native, + /* Acer Extensa 5235 */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"), + }, + }, + { + .callback = video_detect_force_native, + /* Acer TravelMate 4750 */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"), + }, + }, + { + /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */ + .callback = video_detect_force_native, + /* Acer TravelMate 5735Z */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"), + DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"), + }, + }, + { + /* https://bugzilla.kernel.org/show_bug.cgi?id=36322 */ + .callback = video_detect_force_native, + /* Acer TravelMate 5760 */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"), + }, + }, + { + .callback = video_detect_force_native, + /* ASUSTeK COMPUTER INC. GA401 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "GA401"), + }, + }, + { + .callback = video_detect_force_native, + /* ASUSTeK COMPUTER INC. GA502 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "GA502"), + }, + }, + { + .callback = video_detect_force_native, + /* ASUSTeK COMPUTER INC. GA503 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "GA503"), + }, + }, + { + .callback = video_detect_force_native, + /* Asus U46E */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "U46E"), + }, + }, + { + .callback = video_detect_force_native, + /* Asus UX303UB */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"), + }, + }, + { + .callback = video_detect_force_native, + /* HP EliteBook 8460p */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8460p"), + }, + }, + { + .callback = video_detect_force_native, + /* HP Pavilion g6-1d80nr / B4U19UA */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), + DMI_MATCH(DMI_PRODUCT_SKU, "B4U19UA"), + }, + }, + { + .callback = video_detect_force_native, + /* Samsung N150P */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "N150P"), + DMI_MATCH(DMI_BOARD_NAME, "N150P"), + }, + }, + { + .callback = video_detect_force_native, + /* Samsung N145P/N250P/N260P */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"), + DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"), + }, + }, + { + .callback = video_detect_force_native, + /* Samsung N250P */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "N250P"), + DMI_MATCH(DMI_BOARD_NAME, "N250P"), + }, + }, + { + /* https://bugzilla.kernel.org/show_bug.cgi?id=202401 */ + .callback = video_detect_force_native, + /* Sony Vaio VPCEH3U1E */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), + DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"), + }, + }, + { + .callback = video_detect_force_native, + /* Sony Vaio VPCY11S1E */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), + DMI_MATCH(DMI_PRODUCT_NAME, "VPCY11S1E"), + }, + }, + + /* + * These Toshibas have a broken acpi-video interface for brightness + * control. They also have an issue where the panel is off after + * suspend until a special firmware call is made to turn it back + * on. This is handled by the toshiba_acpi kernel module, so that + * module must be enabled for these models to work correctly. + */ + { + /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ + .callback = video_detect_force_native, + /* Toshiba Portégé R700 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"), + }, + }, + { + /* Portégé: https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ + /* Satellite: https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ + .callback = video_detect_force_native, + /* Toshiba Satellite/Portégé R830 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "R830"), + }, + }, + { + .callback = video_detect_force_native, + /* Toshiba Satellite/Portégé Z830 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "Z830"), + }, + }, + + /* + * Dell AIO (All in Ones) which advertise an UART attached backlight + * controller board in their ACPI tables (and may even have one), but + * which need native backlight control nevertheless. + */ + { + /* https://github.com/zabbly/linux/issues/26 */ + .callback = video_detect_force_native, + /* Dell OptiPlex 5480 AIO */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 5480 AIO"), + }, + }, + { + /* https://bugzilla.redhat.com/show_bug.cgi?id=2303936 */ + .callback = video_detect_force_native, + /* Dell OptiPlex 7760 AIO */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7760 AIO"), + }, + }, + + /* + * Models which have nvidia-ec-wmi support, but should not use it. + * Note this indicates a likely firmware bug on these models and should + * be revisited if/when Linux gets support for dynamic mux mode. + */ + { + .callback = video_detect_force_native, + /* Dell G15 5515 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5515"), + }, + }, + { + .callback = video_detect_force_native, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 15 3535"), + }, + }, + + /* + * x86 android tablets which directly control the backlight through + * an external backlight controller, typically TI's LP8557. + * The backlight is directly controlled by the lp855x driver on these. + * This setup means that neither i915's native nor acpi_video backlight + * control works. Add a "vendor" quirk to disable both. Note these + * devices do not use vendor control in the typical meaning of + * vendor specific SMBIOS or ACPI calls being used. + */ + { + .callback = video_detect_force_vendor, + /* Lenovo Yoga Book X90F / X90L */ + .matches = { + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), + DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"), + }, + }, + { + .callback = video_detect_force_vendor, + /* + * Lenovo Yoga Tablet 2 830F/L or 1050F/L (The 8" and 10" + * Lenovo Yoga Tablet 2 use the same mainboard) + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."), + DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"), + DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), + /* Partial match on beginning of BIOS version */ + DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"), + }, + }, + { + .callback = video_detect_force_vendor, + /* Lenovo Yoga Tab 3 Pro YT3-X90F */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"), + }, + }, + { + .callback = video_detect_force_vendor, + /* Xiaomi Mi Pad 2 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"), + DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"), + }, + }, + /* https://gitlab.freedesktop.org/drm/amd/-/issues/4512 */ + { + .callback = video_detect_force_native, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "82K8"), + }, + }, + { }, +}; + +static bool google_cros_ec_present(void) { - acpi_video_caps_check(); - acpi_video_support &= ~ACPI_VIDEO_BACKLIGHT_DMI_VENDOR; + return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C"); } -EXPORT_SYMBOL(acpi_video_dmi_demote_vendor); -/* Returns true if video.ko can do backlight switching */ -int acpi_video_backlight_support(void) +/* + * Windows 8 and newer no longer use the ACPI video interface, so it often + * does not work. So on win8+ systems prefer native brightness control. + * Chromebooks should always prefer native backlight control. + */ +static bool prefer_native_over_acpi_video(void) { - acpi_video_caps_check(); - - /* First check for boot param -> highest prio */ - if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_FORCE_VENDOR) - return 0; - else if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_FORCE_VIDEO) - return 1; - - /* Then check for DMI blacklist -> second highest prio */ - if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_DMI_VENDOR) - return 0; - else if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_DMI_VIDEO) - return 1; - - /* Then go the default way */ - return acpi_video_support & ACPI_VIDEO_BACKLIGHT; + return acpi_osi_is_win8() || google_cros_ec_present(); } -EXPORT_SYMBOL(acpi_video_backlight_support); /* - * Use acpi_backlight=vendor/video to force that backlight switching - * is processed by vendor specific acpi drivers or video.ko driver. + * Determine which type of backlight interface to use on this system, + * First check cmdline, then dmi quirks, then do autodetect. */ -static int __init acpi_backlight(char *str) +enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto_detect) { - if (str == NULL || *str == '\0') - return 1; - else { - if (!strcmp("vendor", str)) - acpi_video_support |= - ACPI_VIDEO_BACKLIGHT_FORCE_VENDOR; - if (!strcmp("video", str)) - acpi_video_support |= - ACPI_VIDEO_BACKLIGHT_FORCE_VIDEO; + static DEFINE_MUTEX(init_mutex); + static bool nvidia_wmi_ec_present; + static bool apple_gmux_present; + static bool dell_uart_present; + static bool native_available; + 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); + nvidia_wmi_ec_present = nvidia_wmi_ec_supported(); + apple_gmux_present = apple_gmux_detect(NULL, NULL); + dell_uart_present = acpi_dev_present("DELL0501", NULL, -1); + init_done = true; } - return 1; + if (native) + native_available = true; + mutex_unlock(&init_mutex); + + if (auto_detect) + *auto_detect = false; + + /* + * The below heuristics / detection steps are in order of descending + * presedence. The commandline takes presedence over anything else. + */ + if (acpi_backlight_cmdline != acpi_backlight_undef) + return acpi_backlight_cmdline; + + /* DMI quirks override any autodetection. */ + if (acpi_backlight_dmi != acpi_backlight_undef) + return acpi_backlight_dmi; + + if (auto_detect) + *auto_detect = true; + + /* Special cases such as nvidia_wmi_ec and apple gmux. */ + if (nvidia_wmi_ec_present) + return acpi_backlight_nvidia_wmi_ec; + + if (apple_gmux_present) + return acpi_backlight_apple_gmux; + + if (dell_uart_present) + return acpi_backlight_dell_uart; + + /* Use ACPI video if available, except when native should be preferred. */ + if ((video_caps & ACPI_VIDEO_BACKLIGHT) && + !(native_available && prefer_native_over_acpi_video())) + return acpi_backlight_video; + + /* Use native if available */ + if (native_available) + return acpi_backlight_native; + + /* + * The vendor specific BIOS interfaces are only necessary for + * laptops from before ~2008. + * + * For laptops from ~2008 till ~2023 this point is never reached + * because on those (video_caps & ACPI_VIDEO_BACKLIGHT) above is true. + * + * Laptops from after ~2023 no longer support ACPI_VIDEO_BACKLIGHT, + * if this point is reached on those, this likely means that + * the GPU kms driver which sets native_available has not loaded yet. + * + * Returning acpi_backlight_vendor in this case is known to sometimes + * cause a non working vendor specific /sys/class/backlight device to + * get registered. + * + * Return acpi_backlight_none on laptops with ACPI tables written + * for Windows 8 (laptops from after ~2012) to avoid this problem. + */ + if (acpi_osi_is_win8()) + return acpi_backlight_none; + + /* No ACPI video/native (old hw), use vendor specific fw methods. */ + return acpi_backlight_vendor; } -__setup("acpi_backlight=", acpi_backlight); +EXPORT_SYMBOL(__acpi_video_get_backlight_type); |