F: drivers/video/fbdev/nvidia/
F: drivers/video/fbdev/riva/
+NVIDIA WMI EC BACKLIGHT DRIVER
+M: Daniel Dadap <ddadap@nvidia.com>
+L: platform-driver-x86@vger.kernel.org
+S: Supported
+F: drivers/platform/x86/nvidia-wmi-ec-backlight.c
+
NVM EXPRESS DRIVER
M: Keith Busch <kbusch@kernel.org>
M: Jens Axboe <axboe@fb.com>
S: Odd fixes
F: drivers/net/wireless/wl3501*
-WMAA BACKLIGHT DRIVER
-M: Daniel Dadap <ddadap@nvidia.com>
-L: platform-driver-x86@vger.kernel.org
-S: Supported
-F: drivers/platform/x86/wmaa-backlight-wmi.c
-
WOLFSON MICROELECTRONICS DRIVERS
L: patches@opensource.cirrus.com
S: Supported
help
Say Y here if you want to support WMI-based hotkeys on PEAQ 2-in-1s.
-config WMAA_BACKLIGHT_WMI
- tristate "ACPI WMAA Backlight Driver"
+config NVIDIA_WMI_EC_BACKLIGHT
+ tristate "EC Backlight Driver for Hybrid Graphics Notebook Systems"
depends on ACPI_WMI
depends on BACKLIGHT_CLASS_DEVICE
help
- This driver provides a sysfs backlight interface for notebook
- systems which expose the WMAA ACPI method and an associated WMI
- wrapper to drive LCD backlight levels through the Embedded Controller
- (EC).
+ This driver provides a sysfs backlight interface for notebook systems
+ which are equipped with NVIDIA hybrid graphics and drive LCD backlight
+ levels through the Embedded Controller (EC).
Say Y or M here if you want to control the backlight on a notebook
- system with an EC-driven backlight using the ACPI WMAA method.
+ system with an EC-driven backlight.
If you choose to compile this driver as a module the module will be
- called wmaa-backlight-wmi.
+ called nvidia-wmi-ec-backlight.
config XIAOMI_WMI
tristate "Xiaomi WMI key driver"
# WMI drivers
obj-$(CONFIG_HUAWEI_WMI) += huawei-wmi.o
obj-$(CONFIG_MXM_WMI) += mxm-wmi.o
+obj-$(CONFIG_NVIDIA_WMI_EC_BACKLIGHT) += nvidia-wmi-ec-backlight.o
obj-$(CONFIG_PEAQ_WMI) += peaq-wmi.o
-obj-$(CONFIG_WMAA_BACKLIGHT_WMI) += wmaa-backlight-wmi.o
obj-$(CONFIG_XIAOMI_WMI) += xiaomi-wmi.o
obj-$(CONFIG_GIGABYTE_WMI) += gigabyte-wmi.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
+ */
+
+#include <linux/acpi.h>
+#include <linux/backlight.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/wmi.h>
+
+/**
+ * enum wmi_brightness_method - WMI method IDs
+ * @WMI_BRIGHTNESS_METHOD_LEVEL: Get/Set EC brightness level status
+ * @WMI_BRIGHTNESS_METHOD_SOURCE: Get/Set EC Brightness Source
+ */
+enum wmi_brightness_method {
+ WMI_BRIGHTNESS_METHOD_LEVEL = 1,
+ WMI_BRIGHTNESS_METHOD_SOURCE = 2,
+ WMI_BRIGHTNESS_METHOD_MAX
+};
+
+/**
+ * enum wmi_brightness_mode - Operation mode for WMI-wrapped method
+ * @WMI_BRIGHTNESS_MODE_GET: Get the current brightness level/source.
+ * @WMI_BRIGHTNESS_MODE_SET: Set the brightness level.
+ * @WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL: Get the maximum brightness level. This
+ * is only valid when the WMI method is
+ * %WMI_BRIGHTNESS_METHOD_LEVEL.
+ */
+enum wmi_brightness_mode {
+ WMI_BRIGHTNESS_MODE_GET = 0,
+ WMI_BRIGHTNESS_MODE_SET = 1,
+ WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL = 2,
+ WMI_BRIGHTNESS_MODE_MAX
+};
+
+/**
+ * enum wmi_brightness_source - Backlight brightness control source selection
+ * @WMI_BRIGHTNESS_SOURCE_GPU: Backlight brightness is controlled by the GPU.
+ * @WMI_BRIGHTNESS_SOURCE_EC: Backlight brightness is controlled by the
+ * system's Embedded Controller (EC).
+ * @WMI_BRIGHTNESS_SOURCE_AUX: Backlight brightness is controlled over the
+ * DisplayPort AUX channel.
+ */
+enum wmi_brightness_source {
+ WMI_BRIGHTNESS_SOURCE_GPU = 1,
+ WMI_BRIGHTNESS_SOURCE_EC = 2,
+ WMI_BRIGHTNESS_SOURCE_AUX = 3,
+ WMI_BRIGHTNESS_SOURCE_MAX
+};
+
+/**
+ * struct wmi_brightness_args - arguments for the WMI-wrapped ACPI method
+ * @mode: Pass in an &enum wmi_brightness_mode value to select between
+ * getting or setting a value.
+ * @val: In parameter for value to set when using %WMI_BRIGHTNESS_MODE_SET
+ * mode. Not used in conjunction with %WMI_BRIGHTNESS_MODE_GET or
+ * %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL mode.
+ * @ret: Out parameter returning retrieved value when operating in
+ * %WMI_BRIGHTNESS_MODE_GET or %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL
+ * mode. Not used in %WMI_BRIGHTNESS_MODE_SET mode.
+ * @ignored: Padding; not used. The ACPI method expects a 24 byte params struct.
+ *
+ * This is the parameters structure for the WmiBrightnessNotify ACPI method as
+ * wrapped by WMI. The value passed in to @val or returned by @ret will be a
+ * brightness value when the WMI method ID is %WMI_BRIGHTNESS_METHOD_LEVEL, or
+ * an &enum wmi_brightness_source value with %WMI_BRIGHTNESS_METHOD_SOURCE.
+ */
+struct wmi_brightness_args {
+ u32 mode;
+ u32 val;
+ u32 ret;
+ u32 ignored[3];
+};
+
+/**
+ * wmi_brightness_notify() - helper function for calling WMI-wrapped ACPI method
+ * @w: Pointer to the struct wmi_device identified by %WMI_BRIGHTNESS_GUID
+ * @id: The WMI method ID to call (e.g. %WMI_BRIGHTNESS_METHOD_LEVEL or
+ * %WMI_BRIGHTNESS_METHOD_SOURCE)
+ * @mode: The operation to perform on the method (e.g. %WMI_BRIGHTNESS_MODE_SET
+ * or %WMI_BRIGHTNESS_MODE_GET)
+ * @val: Pointer to a value passed in by the caller when @mode is
+ * %WMI_BRIGHTNESS_MODE_SET, or a value passed out to caller when @mode
+ * is %WMI_BRIGHTNESS_MODE_GET or %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL.
+ *
+ * Returns 0 on success, or a negative error number on failure.
+ */
+static int wmi_brightness_notify(struct wmi_device *w, enum wmi_brightness_method id, enum wmi_brightness_mode mode, u32 *val)
+{
+ struct wmi_brightness_args args = {
+ .mode = mode,
+ .val = 0,
+ .ret = 0,
+ };
+ struct acpi_buffer buf = { (acpi_size)sizeof(args), &args };
+ acpi_status status;
+
+ if (id < WMI_BRIGHTNESS_METHOD_LEVEL ||
+ id >= WMI_BRIGHTNESS_METHOD_MAX ||
+ mode < WMI_BRIGHTNESS_MODE_GET || mode >= WMI_BRIGHTNESS_MODE_MAX)
+ return -EINVAL;
+
+ if (mode == WMI_BRIGHTNESS_MODE_SET)
+ args.val = *val;
+
+ status = wmidev_evaluate_method(w, 0, id, &buf, &buf);
+ if (ACPI_FAILURE(status)) {
+ dev_err(&w->dev, "EC backlight control failed: %s\n",
+ acpi_format_exception(status));
+ return -EIO;
+ }
+
+ if (mode != WMI_BRIGHTNESS_MODE_SET)
+ *val = args.ret;
+
+ return 0;
+}
+
+static int nvidia_wmi_ec_backlight_update_status(struct backlight_device *bd)
+{
+ struct wmi_device *wdev = bl_get_data(bd);
+
+ return wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_LEVEL,
+ WMI_BRIGHTNESS_MODE_SET,
+ &bd->props.brightness);
+}
+
+static int nvidia_wmi_ec_backlight_get_brightness(struct backlight_device *bd)
+{
+ struct wmi_device *wdev = bl_get_data(bd);
+ u32 level;
+ int ret;
+
+ ret = wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_LEVEL,
+ WMI_BRIGHTNESS_MODE_GET, &level);
+ if (ret < 0)
+ return ret;
+
+ return level;
+}
+
+static const struct backlight_ops nvidia_wmi_ec_backlight_ops = {
+ .update_status = nvidia_wmi_ec_backlight_update_status,
+ .get_brightness = nvidia_wmi_ec_backlight_get_brightness,
+};
+
+static int nvidia_wmi_ec_backlight_probe(struct wmi_device *wdev, const void *ctx)
+{
+ struct backlight_properties props = {};
+ struct backlight_device *bdev;
+ u32 source;
+ int ret;
+
+ ret = wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_SOURCE,
+ WMI_BRIGHTNESS_MODE_GET, &source);
+ if (ret)
+ return ret;
+
+ /*
+ * This driver is only to be used when brightness control is handled
+ * by the EC; otherwise, the GPU driver(s) should control brightness.
+ */
+ if (source != WMI_BRIGHTNESS_SOURCE_EC)
+ return -ENODEV;
+
+ /*
+ * Identify this backlight device as a firmware device so that it can
+ * be prioritized over any exposed GPU-driven raw device(s).
+ */
+ props.type = BACKLIGHT_FIRMWARE;
+
+ ret = wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_LEVEL,
+ WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL,
+ &props.max_brightness);
+ if (ret)
+ return ret;
+
+ ret = wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_LEVEL,
+ WMI_BRIGHTNESS_MODE_GET, &props.brightness);
+ if (ret)
+ return ret;
+
+ bdev = devm_backlight_device_register(&wdev->dev,
+ "nvidia_wmi_ec_backlight",
+ &wdev->dev, wdev,
+ &nvidia_wmi_ec_backlight_ops,
+ &props);
+ return PTR_ERR_OR_ZERO(bdev);
+}
+
+#define WMI_BRIGHTNESS_GUID "603E9613-EF25-4338-A3D0-C46177516DB7"
+
+static const struct wmi_device_id nvidia_wmi_ec_backlight_id_table[] = {
+ { .guid_string = WMI_BRIGHTNESS_GUID },
+ { }
+};
+MODULE_DEVICE_TABLE(wmi, nvidia_wmi_ec_backlight_id_table);
+
+static struct wmi_driver nvidia_wmi_ec_backlight_driver = {
+ .driver = {
+ .name = "nvidia-wmi-ec-backlight",
+ },
+ .probe = nvidia_wmi_ec_backlight_probe,
+ .id_table = nvidia_wmi_ec_backlight_id_table,
+};
+module_wmi_driver(nvidia_wmi_ec_backlight_driver);
+
+MODULE_AUTHOR("Daniel Dadap <ddadap@nvidia.com>");
+MODULE_DESCRIPTION("NVIDIA WMI EC Backlight driver");
+MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
- */
-
-#include <linux/acpi.h>
-#include <linux/backlight.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/wmi.h>
-
-/**
- * enum wmi_brightness_method - WMI method IDs
- * @WMI_BRIGHTNESS_METHOD_LEVEL: Get/Set EC brightness level status
- * @WMI_BRIGHTNESS_METHOD_SOURCE: Get/Set EC Brightness Source
- */
-enum wmi_brightness_method {
- WMI_BRIGHTNESS_METHOD_LEVEL = 1,
- WMI_BRIGHTNESS_METHOD_SOURCE = 2,
- WMI_BRIGHTNESS_METHOD_MAX
-};
-
-/**
- * enum wmi_brightness_mode - Operation mode for WMI-wrapped method
- * @WMI_BRIGHTNESS_MODE_GET: Get the current brightness level/source.
- * @WMI_BRIGHTNESS_MODE_SET: Set the brightness level.
- * @WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL: Get the maximum brightness level. This
- * is only valid when the WMI method is
- * %WMI_BRIGHTNESS_METHOD_LEVEL.
- */
-enum wmi_brightness_mode {
- WMI_BRIGHTNESS_MODE_GET = 0,
- WMI_BRIGHTNESS_MODE_SET = 1,
- WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL = 2,
- WMI_BRIGHTNESS_MODE_MAX
-};
-
-/**
- * enum wmi_brightness_source - Backlight brightness control source selection
- * @WMI_BRIGHTNESS_SOURCE_GPU: Backlight brightness is controlled by the GPU.
- * @WMI_BRIGHTNESS_SOURCE_EC: Backlight brightness is controlled by the
- * system's Embedded Controller (EC).
- * @WMI_BRIGHTNESS_SOURCE_AUX: Backlight brightness is controlled over the
- * DisplayPort AUX channel.
- */
-enum wmi_brightness_source {
- WMI_BRIGHTNESS_SOURCE_GPU = 1,
- WMI_BRIGHTNESS_SOURCE_EC = 2,
- WMI_BRIGHTNESS_SOURCE_AUX = 3,
- WMI_BRIGHTNESS_SOURCE_MAX
-};
-
-/**
- * struct wmi_brightness_args - arguments for the WMI-wrapped ACPI method
- * @mode: Pass in an &enum wmi_brightness_mode value to select between
- * getting or setting a value.
- * @val: In parameter for value to set when using %WMI_BRIGHTNESS_MODE_SET
- * mode. Not used in conjunction with %WMI_BRIGHTNESS_MODE_GET or
- * %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL mode.
- * @ret: Out parameter returning retrieved value when operating in
- * %WMI_BRIGHTNESS_MODE_GET or %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL
- * mode. Not used in %WMI_BRIGHTNESS_MODE_SET mode.
- * @ignored: Padding; not used. The ACPI method expects a 24 byte params struct.
- *
- * This is the parameters structure for the WmiBrightnessNotify ACPI method as
- * wrapped by WMI. The value passed in to @val or returned by @ret will be a
- * brightness value when the WMI method ID is %WMI_BRIGHTNESS_METHOD_LEVEL, or
- * an &enum wmi_brightness_source value with %WMI_BRIGHTNESS_METHOD_SOURCE.
- */
-struct wmi_brightness_args {
- u32 mode;
- u32 val;
- u32 ret;
- u32 ignored[3];
-};
-
-/**
- * wmi_brightness_notify() - helper function for calling WMI-wrapped ACPI method
- * @w: Pointer to the struct wmi_device identified by %WMI_BRIGHTNESS_GUID
- * @id: The WMI method ID to call (e.g. %WMI_BRIGHTNESS_METHOD_LEVEL or
- * %WMI_BRIGHTNESS_METHOD_SOURCE)
- * @mode: The operation to perform on the method (e.g. %WMI_BRIGHTNESS_MODE_SET
- * or %WMI_BRIGHTNESS_MODE_GET)
- * @val: Pointer to a value passed in by the caller when @mode is
- * %WMI_BRIGHTNESS_MODE_SET, or a value passed out to caller when @mode
- * is %WMI_BRIGHTNESS_MODE_GET or %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL.
- *
- * Returns 0 on success, or a negative error number on failure.
- */
-static int wmi_brightness_notify(struct wmi_device *w, enum wmi_brightness_method id, enum wmi_brightness_mode mode, u32 *val)
-{
- struct wmi_brightness_args args = {
- .mode = mode,
- .val = 0,
- .ret = 0,
- };
- struct acpi_buffer buf = { (acpi_size)sizeof(args), &args };
- acpi_status status;
-
- if (id < WMI_BRIGHTNESS_METHOD_LEVEL ||
- id >= WMI_BRIGHTNESS_METHOD_MAX ||
- mode < WMI_BRIGHTNESS_MODE_GET || mode >= WMI_BRIGHTNESS_MODE_MAX)
- return -EINVAL;
-
- if (mode == WMI_BRIGHTNESS_MODE_SET)
- args.val = *val;
-
- status = wmidev_evaluate_method(w, 0, id, &buf, &buf);
- if (ACPI_FAILURE(status)) {
- dev_err(&w->dev, "EC backlight control failed: %s\n",
- acpi_format_exception(status));
- return -EIO;
- }
-
- if (mode != WMI_BRIGHTNESS_MODE_SET)
- *val = args.ret;
-
- return 0;
-}
-
-static int nvidia_wmi_ec_backlight_update_status(struct backlight_device *bd)
-{
- struct wmi_device *wdev = bl_get_data(bd);
-
- return wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_LEVEL,
- WMI_BRIGHTNESS_MODE_SET,
- &bd->props.brightness);
-}
-
-static int nvidia_wmi_ec_backlight_get_brightness(struct backlight_device *bd)
-{
- struct wmi_device *wdev = bl_get_data(bd);
- u32 level;
- int ret;
-
- ret = wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_LEVEL,
- WMI_BRIGHTNESS_MODE_GET, &level);
- if (ret < 0)
- return ret;
-
- return level;
-}
-
-static const struct backlight_ops nvidia_wmi_ec_backlight_ops = {
- .update_status = nvidia_wmi_ec_backlight_update_status,
- .get_brightness = nvidia_wmi_ec_backlight_get_brightness,
-};
-
-static int nvidia_wmi_ec_backlight_probe(struct wmi_device *wdev, const void *ctx)
-{
- struct backlight_properties props = {};
- struct backlight_device *bdev;
- u32 source;
- int ret;
-
- ret = wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_SOURCE,
- WMI_BRIGHTNESS_MODE_GET, &source);
- if (ret)
- return ret;
-
- /*
- * This driver is only to be used when brightness control is handled
- * by the EC; otherwise, the GPU driver(s) should control brightness.
- */
- if (source != WMI_BRIGHTNESS_SOURCE_EC)
- return -ENODEV;
-
- /*
- * Identify this backlight device as a firmware device so that it can
- * be prioritized over any exposed GPU-driven raw device(s).
- */
- props.type = BACKLIGHT_FIRMWARE;
-
- ret = wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_LEVEL,
- WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL,
- &props.max_brightness);
- if (ret)
- return ret;
-
- ret = wmi_brightness_notify(wdev, WMI_BRIGHTNESS_METHOD_LEVEL,
- WMI_BRIGHTNESS_MODE_GET, &props.brightness);
- if (ret)
- return ret;
-
- bdev = devm_backlight_device_register(&wdev->dev,
- "nvidia_wmi_ec_backlight",
- &wdev->dev, wdev,
- &nvidia_wmi_ec_backlight_ops,
- &props);
- return PTR_ERR_OR_ZERO(bdev);
-}
-
-#define WMI_BRIGHTNESS_GUID "603E9613-EF25-4338-A3D0-C46177516DB7"
-
-static const struct wmi_device_id nvidia_wmi_ec_backlight_id_table[] = {
- { .guid_string = WMI_BRIGHTNESS_GUID },
- { }
-};
-MODULE_DEVICE_TABLE(wmi, nvidia_wmi_ec_backlight_id_table);
-
-static struct wmi_driver nvidia_wmi_ec_backlight_driver = {
- .driver = {
- .name = "nvidia-wmi-ec-backlight",
- },
- .probe = nvidia_wmi_ec_backlight_probe,
- .id_table = nvidia_wmi_ec_backlight_id_table,
-};
-module_wmi_driver(nvidia_wmi_ec_backlight_driver);
-
-MODULE_AUTHOR("Daniel Dadap <ddadap@nvidia.com>");
-MODULE_DESCRIPTION("NVIDIA WMI EC Backlight driver");
-MODULE_LICENSE("GPL");
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