Am 07.10.24 um 11:33 schrieb Kurt Borja:
This patch adds platform_profile support for Dell devices which implement
User Selectable Thermal Tables (USTT) that are meant to be controlled by
Alienware Command Center (AWCC). These devices may include newer Alienware
M-Series, Alienware X-Series and Dell's G-Series. This patch, was tested
by me on an Alienware x15 R1.
It is suspected that Alienware Command Center manages thermal profiles
through the WMI interface, specifically through a device with identifier
\_SB_.AMW1.WMAX. This device was reverse engineered and the relevant
functionality is documented here [1]. This driver interacts with this
WMI device and thus is able to mimic AWCC's thermal profiles functionality
through the platform_profile API. In consequence the user would be able
to set and retrieve thermal profiles, which are just fan speed profiles.
This driver was heavily inspired on inspur_platform_profile, special
thanks.
Notes:
- Performance (FullSpeed) profile is a special profile which has it's own
entry in the Firmware Settings of the Alienware x15 R1. It also changes
the color of the F1 key. I suspect this behavior would be replicated in
other X-Series or M-Series laptops.
- G-Mode is a profile documented on [1] which mimics the behavior of
FullSpeed mode but it does not have an entry on the Firmware Settings of
the Alienware x15 R1, this may correspond to the G-Mode functionality on
G-Series laptops (activated by a special button) but I cannot test it. I
did not include this code in the driver as G-Mode causes unexpected
behavior on X-Series laptops.
Thanks for your time and patiente in advance.
Regards,
Kurt
[1] https://gist.github.com/kuu-rt/b22328ff2b454be505387e2a38c61ee4
Hi,
this WMI device is already handled by the alienware-wmi driver. Could you please integrate
this functionality into this driver instead of creating a new one?
Thanks,
Armin Wolf
Signed-off-by: Kurt Borja <kuurtb@xxxxxxxxx>
---
drivers/platform/x86/dell/Kconfig | 9 +
drivers/platform/x86/dell/Makefile | 1 +
drivers/platform/x86/dell/dell-wmi-awcc.c | 204 ++++++++++++++++++++++
3 files changed, 214 insertions(+)
create mode 100644 drivers/platform/x86/dell/dell-wmi-awcc.c
diff --git a/drivers/platform/x86/dell/Kconfig b/drivers/platform/x86/dell/Kconfig
index 68a49788a..20300ff98 100644
--- a/drivers/platform/x86/dell/Kconfig
+++ b/drivers/platform/x86/dell/Kconfig
@@ -27,6 +27,15 @@ config ALIENWARE_WMI
zones on Alienware machines that don't contain a dedicated AlienFX
USB MCU such as the X51 and X51-R2.
+config AWCC_PLATFORM_PROFILE
+ tristate "AWCC Platform Profile support"
+ depends on ACPI_WMI
+ select ACPI_PLATFORM_PROFILE
+ help
+ This driver provides platform_profile support for selecting thermal
+ profiles on Dell devices with User Selectable Thermal Tables,
+ controlled by AWCC's WMI interface.
+
config DCDBAS
tristate "Dell Systems Management Base Driver"
default m
diff --git a/drivers/platform/x86/dell/Makefile b/drivers/platform/x86/dell/Makefile
index 79d60f1bf..bfef99580 100644
--- a/drivers/platform/x86/dell/Makefile
+++ b/drivers/platform/x86/dell/Makefile
@@ -23,4 +23,5 @@ obj-$(CONFIG_DELL_WMI_AIO) += dell-wmi-aio.o
obj-$(CONFIG_DELL_WMI_DESCRIPTOR) += dell-wmi-descriptor.o
obj-$(CONFIG_DELL_WMI_DDV) += dell-wmi-ddv.o
obj-$(CONFIG_DELL_WMI_LED) += dell-wmi-led.o
+obj-$(CONFIG_AWCC_PLATFORM_PROFILE) += dell-wmi-awcc.o
obj-$(CONFIG_DELL_WMI_SYSMAN) += dell-wmi-sysman/
diff --git a/drivers/platform/x86/dell/dell-wmi-awcc.c b/drivers/platform/x86/dell/dell-wmi-awcc.c
new file mode 100644
index 000000000..0837d1bc6
--- /dev/null
+++ b/drivers/platform/x86/dell/dell-wmi-awcc.c
@@ -0,0 +1,204 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * WMI driver for Dell's AWCC platform_profile
+ *
+ * Copyright (c) Kurt Borja <kuurtb@xxxxxxxxx>
+ *
+ */
+
+#include <linux/acpi.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_profile.h>
+#include <linux/wmi.h>
+
+#define PROF_TO_ARG(mode) ((mode << 8) | 1)
+
+#define DELL_AWCC_GUID "A70591CE-A997-11DA-B012-B622A1EF5492"
+
+enum awcc_wmi_method {
+ AWCC_WMI_THERMAL_INFORMATION = 0x14,
+ AWCC_WMI_THERMAL_CONTROL = 0x15,
+};
+
+enum awcc_tmp_profile {
+ AWCC_TMP_PROFILE_BALANCED = 0xA0,
+ AWCC_TMP_PROFILE_BALANCED_PERFORMANCE = 0xA1,
+ AWCC_TMP_PROFILE_COOL = 0xA2,
+ AWCC_TMP_PROFILE_QUIET = 0xA3,
+ AWCC_TMP_PROFILE_PERFORMANCE = 0xA4,
+ AWCC_TMP_PROFILE_LOW_POWER = 0xA5,
+};
+
+struct awcc_wmi_priv {
+ struct wmi_device *wdev;
+ struct platform_profile_handler handler;
+};
+
+static int awcc_wmi_query(struct wmi_device *wdev, enum awcc_wmi_method method,
+ u32 arg, u32 *res)
+{
+ struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
+ const struct acpi_buffer in = { sizeof(arg), &arg };
+ union acpi_object *obj;
+ acpi_status status;
+ int ret = 0;
+
+ status = wmidev_evaluate_method(wdev, 0x0, method, &in, &out);
+
+ if (ACPI_FAILURE(status))
+ return -EIO;
+
+ obj = out.pointer;
+ if (!obj)
+ return -ENODATA;
+
+ if (obj->type != ACPI_TYPE_INTEGER) {
+ ret = -EINVAL;
+ goto out_free;
+ }
+
+ if (obj->integer.value <= U32_MAX)
+ *res = (u32)obj->integer.value;
+ else
+ ret = -ERANGE;
+
+out_free:
+ kfree(obj);
+
+ return ret;
+}
+
+static int awcc_platform_profile_get(struct platform_profile_handler *pprof,
+ enum platform_profile_option *profile)
+{
+ struct awcc_wmi_priv *priv =
+ container_of(pprof, struct awcc_wmi_priv, handler);
+
+ u32 res;
+ int ret;
+
+ ret = awcc_wmi_query(priv->wdev, AWCC_WMI_THERMAL_INFORMATION, 0x0B,
+ &res);
+
+ if (ret < 0)
+ return ret;
+
+ if (res < 0)
+ return -EBADRQC;
+
+ switch (res) {
+ case AWCC_TMP_PROFILE_LOW_POWER:
+ *profile = PLATFORM_PROFILE_LOW_POWER;
+ break;
+ case AWCC_TMP_PROFILE_QUIET:
+ *profile = PLATFORM_PROFILE_QUIET;
+ break;
+ case AWCC_TMP_PROFILE_BALANCED:
+ *profile = PLATFORM_PROFILE_BALANCED;
+ break;
+ case AWCC_TMP_PROFILE_BALANCED_PERFORMANCE:
+ *profile = PLATFORM_PROFILE_BALANCED_PERFORMANCE;
+ break;
+ case AWCC_TMP_PROFILE_PERFORMANCE:
+ *profile = PLATFORM_PROFILE_PERFORMANCE;
+ break;
+ default:
+ return -ENODATA;
+ }
+
+ return 0;
+}
+
+static int awcc_platform_profile_set(struct platform_profile_handler *pprof,
+ enum platform_profile_option profile)
+{
+ struct awcc_wmi_priv *priv =
+ container_of(pprof, struct awcc_wmi_priv, handler);
+
+ u32 arg;
+ u32 res;
+ int ret;
+
+ switch (profile) {
+ case PLATFORM_PROFILE_LOW_POWER:
+ arg = PROF_TO_ARG(AWCC_TMP_PROFILE_LOW_POWER);
+ break;
+ case PLATFORM_PROFILE_QUIET:
+ arg = PROF_TO_ARG(AWCC_TMP_PROFILE_QUIET);
+ break;
+ case PLATFORM_PROFILE_BALANCED:
+ arg = PROF_TO_ARG(AWCC_TMP_PROFILE_BALANCED);
+ break;
+ case PLATFORM_PROFILE_BALANCED_PERFORMANCE:
+ arg = PROF_TO_ARG(AWCC_TMP_PROFILE_BALANCED_PERFORMANCE);
+ break;
+ case PLATFORM_PROFILE_PERFORMANCE:
+ arg = PROF_TO_ARG(AWCC_TMP_PROFILE_PERFORMANCE);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ ret = awcc_wmi_query(priv->wdev, AWCC_WMI_THERMAL_CONTROL, arg, &res);
+
+ if (ret < 0)
+ return ret;
+
+ if (res < 0)
+ return -EBADRQC;
+
+ return 0;
+}
+
+static int awcc_wmi_probe(struct wmi_device *wdev, const void *context)
+{
+ struct awcc_wmi_priv *priv;
+
+ priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->wdev = wdev;
+ dev_set_drvdata(&wdev->dev, priv);
+
+ priv->handler.profile_set = awcc_platform_profile_set;
+ priv->handler.profile_get = awcc_platform_profile_get;
+
+ set_bit(PLATFORM_PROFILE_LOW_POWER, priv->handler.choices);
+ set_bit(PLATFORM_PROFILE_QUIET, priv->handler.choices);
+ set_bit(PLATFORM_PROFILE_BALANCED, priv->handler.choices);
+ set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, priv->handler.choices);
+ set_bit(PLATFORM_PROFILE_PERFORMANCE, priv->handler.choices);
+
+ return platform_profile_register(&priv->handler);
+}
+
+static void awcc_wmi_remove(struct wmi_device *wdev)
+{
+ platform_profile_remove();
+}
+
+static const struct wmi_device_id awcc_wmi_id_table[] = {
+ { .guid_string = DELL_AWCC_GUID },
+ {},
+};
+
+MODULE_DEVICE_TABLE(wmi, awcc_wmi_id_table);
+
+static struct wmi_driver awcc_wmi_driver = {
+ .driver = {
+ .name = "dell-wmi-awcc-platform-profile",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ },
+ .id_table = awcc_wmi_id_table,
+ .probe = awcc_wmi_probe,
+ .remove = awcc_wmi_remove,
+ .no_singleton = true,
+};
+
+module_wmi_driver(awcc_wmi_driver);
+
+MODULE_AUTHOR("Kurt Borja");
+MODULE_DESCRIPTION("Dell AWCC WMI driver");
+MODULE_LICENSE("GPL");
