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-rw-r--r--drivers/acpi/video_detect.c428
1 files changed, 254 insertions, 174 deletions
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 5d7f38016a24..db2474fe58ac 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -17,8 +17,9 @@
* 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.
+ * 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
@@ -27,20 +28,16 @@
#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/types.h>
#include <linux/workqueue.h>
#include <acpi/video.h>
-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;
@@ -78,6 +75,36 @@ 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)
@@ -105,63 +132,143 @@ static int video_detect_force_none(const struct dmi_system_id *d)
}
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) until 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().
- */
{
+ /* https://bugzilla.redhat.com/show_bug.cgi?id=1128309 */
.callback = video_detect_force_vendor,
- /* 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,
- /* 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,
- /* 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,
- /* GIGABYTE GB-BXBT-2807 */
- .matches = {
+ .callback = video_detect_force_vendor,
+ /* Asus X55U */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "X55U"),
+ },
+ },
+ {
+ .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"),
+ },
+ },
+ {
+ .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,
+ /* GIGABYTE GB-BXBT-2807 */
+ .matches = {
DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"),
DMI_MATCH(DMI_PRODUCT_NAME, "GB-BXBT-2807"),
},
},
{
- .callback = video_detect_force_vendor,
- /* Sony VPCEH3U1E */
- .matches = {
+ .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"),
+ },
+ },
+ {
+ .callback = video_detect_force_vendor,
+ /* Sony VPCEH3U1E */
+ .matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"),
},
},
{
- .callback = video_detect_force_vendor,
- /* Xiaomi Mi Pad 2 */
- .matches = {
+ .callback = video_detect_force_vendor,
+ /* Xiaomi Mi Pad 2 */
+ .matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
},
},
/*
+ * 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"),
+ },
+ },
+
+ /*
* 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
@@ -390,130 +497,119 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
},
{
- /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */
+ /* https://bugzilla.redhat.com/show_bug.cgi?id=1012674 */
.callback = video_detect_force_native,
- /* Acer TravelMate 5735Z */
+ /* Acer Aspire 5741 */
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
- DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"),
- DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"),
+ DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"),
},
},
{
- .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"),
+ /* 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"),
},
},
{
- .callback = video_detect_force_native,
- /* ASUSTeK COMPUTER INC. GA503 */
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
- DMI_MATCH(DMI_PRODUCT_NAME, "GA503"),
+ /* 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"),
},
},
- /*
- * Clevo NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2 have both a
- * working native and video interface. However the default detection
- * mechanism first registers the video interface before unregistering
- * it again and switching to the native interface during boot. This
- * results in a dangling SBIOS request for backlight change for some
- * reason, causing the backlight to switch to ~2% once per boot on the
- * first power cord connect or disconnect event. Setting the native
- * interface explicitly circumvents this buggy behaviour, by avoiding
- * the unregistering process.
- */
{
- .callback = video_detect_force_native,
- .ident = "Clevo NL5xRU",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"),
+ .callback = video_detect_force_native,
+ /* Acer TravelMate 4750 */
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"),
},
},
{
- .callback = video_detect_force_native,
- .ident = "Clevo NL5xRU",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
- DMI_MATCH(DMI_BOARD_NAME, "AURA1501"),
+ /* 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"),
},
},
{
- .callback = video_detect_force_native,
- .ident = "Clevo NL5xRU",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
- DMI_MATCH(DMI_BOARD_NAME, "EDUBOOK1502"),
+ /* 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,
- .ident = "Clevo NL5xNU",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"),
+ .callback = video_detect_force_native,
+ /* ASUSTeK COMPUTER INC. GA401 */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "GA401"),
},
},
- /*
- * The TongFang PF5PU1G, PF4NU1F, PF5NU1G, and PF5LUXG/TUXEDO BA15 Gen10,
- * Pulse 14/15 Gen1, and Pulse 15 Gen2 have the same problem as the Clevo
- * NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2. See the description
- * above.
- */
{
- .callback = video_detect_force_native,
- .ident = "TongFang PF5PU1G",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "PF5PU1G"),
+ .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,
- .ident = "TongFang PF4NU1F",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "PF4NU1F"),
+ .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,
- .ident = "TongFang PF4NU1F",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
- DMI_MATCH(DMI_BOARD_NAME, "PULSE1401"),
+ .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,
- .ident = "TongFang PF5NU1G",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "PF5NU1G"),
+ .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,
- .ident = "TongFang PF5NU1G",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
- DMI_MATCH(DMI_BOARD_NAME, "PULSE1501"),
+ .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,
- .ident = "TongFang PF5LUXG",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "PF5LUXG"),
+ .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"),
},
},
+
/*
* Desktops which falsely report a backlight and which our heuristics
* for this do not catch.
@@ -537,43 +633,15 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{ },
};
-/* 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 enum acpi_backlight_type __acpi_video_get_backlight_type(bool native)
{
static DEFINE_MUTEX(init_mutex);
+ static bool nvidia_wmi_ec_present;
+ static bool native_available;
static bool init_done;
static long video_caps;
@@ -585,48 +653,60 @@ enum acpi_backlight_type acpi_video_get_backlight_type(void)
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;
+ nvidia_wmi_ec_present = nvidia_wmi_ec_supported();
init_done = true;
}
+ if (native)
+ native_available = true;
mutex_unlock(&init_mutex);
+ /*
+ * 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 (!(video_caps & ACPI_VIDEO_BACKLIGHT))
- return acpi_backlight_vendor;
+ /* Special cases such as nvidia_wmi_ec and apple gmux. */
+ if (nvidia_wmi_ec_present)
+ return acpi_backlight_nvidia_wmi_ec;
- if (acpi_osi_is_win8() && backlight_device_get_by_type(BACKLIGHT_RAW))
- return acpi_backlight_native;
+ if (apple_gmux_present())
+ return acpi_backlight_apple_gmux;
+
+ /* On systems with ACPI video use either native or ACPI video. */
+ if (video_caps & ACPI_VIDEO_BACKLIGHT) {
+ /*
+ * Windows 8 and newer no longer use the ACPI video interface,
+ * so it often does not work. If the ACPI tables are written
+ * for win8 and native brightness ctl is available, use that.
+ *
+ * The native check deliberately is inside the if acpi-video
+ * block on older devices without acpi-video support native
+ * is usually not the best choice.
+ */
+ if (acpi_osi_is_win8() && native_available)
+ return acpi_backlight_native;
+ else
+ return acpi_backlight_video;
+ }
- return acpi_backlight_video;
+ /* No ACPI video (old hw), use vendor specific fw methods. */
+ return acpi_backlight_vendor;
}
-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)
+enum acpi_backlight_type acpi_video_get_backlight_type(void)
{
- 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();
+ return __acpi_video_get_backlight_type(false);
}
-EXPORT_SYMBOL(acpi_video_set_dmi_backlight_type);
+EXPORT_SYMBOL(acpi_video_get_backlight_type);
-void __exit acpi_video_detect_exit(void)
+bool acpi_video_backlight_use_native(void)
{
- if (backlight_notifier_registered)
- backlight_unregister_notifier(&backlight_nb);
+ return __acpi_video_get_backlight_type(true) == acpi_backlight_native;
}
+EXPORT_SYMBOL(acpi_video_backlight_use_native);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 13:07:08 +0100