3172322f64
- Rename Kconfig options (SURFACE_ACPI_XXX -> SURFACE_SAM_XXX) - Rename identifiers/functions. - Split into multiple modules (surface_sam_ssh, surface_sam_san, ...)
360 lines
10 KiB
Diff
360 lines
10 KiB
Diff
From 887b26209eea40ed443ad7f1989f0e009f8928dd Mon Sep 17 00:00:00 2001
|
|
From: Maximilian Luz <luzmaximilian@gmail.com>
|
|
Date: Tue, 2 Jul 2019 22:17:46 +0200
|
|
Subject: [PATCH 3/9] surfacebook2-dgpu
|
|
|
|
---
|
|
drivers/platform/x86/Kconfig | 9 +
|
|
drivers/platform/x86/Makefile | 1 +
|
|
drivers/platform/x86/surfacebook2_dgpu_hps.c | 306 +++++++++++++++++++
|
|
3 files changed, 316 insertions(+)
|
|
create mode 100644 drivers/platform/x86/surfacebook2_dgpu_hps.c
|
|
|
|
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
|
|
index 0c1fc3655b5c..c8abd3d70461 100644
|
|
--- a/drivers/platform/x86/Kconfig
|
|
+++ b/drivers/platform/x86/Kconfig
|
|
@@ -481,6 +481,15 @@ config SURFACE3_WMI
|
|
To compile this driver as a module, choose M here: the module will
|
|
be called surface3-wmi.
|
|
|
|
+config SURFACE_BOOK2_DGPU_HPS
|
|
+ tristate "Surface Book 2 dGPU Hot-Plug System Driver"
|
|
+ depends on ACPI
|
|
+ ---help---
|
|
+ This is an experimetnal driver to control the power-state of the
|
|
+ Surface Book 2 dGPU.
|
|
+
|
|
+ If you have a Surface Book 2, say Y or M here.
|
|
+
|
|
config THINKPAD_ACPI
|
|
tristate "ThinkPad ACPI Laptop Extras"
|
|
depends on ACPI
|
|
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
|
|
index 662e595ae13f..c33d76577b5a 100644
|
|
--- a/drivers/platform/x86/Makefile
|
|
+++ b/drivers/platform/x86/Makefile
|
|
@@ -49,6 +49,7 @@ obj-$(CONFIG_ACPI_WMI) += wmi.o
|
|
obj-$(CONFIG_MSI_WMI) += msi-wmi.o
|
|
obj-$(CONFIG_PEAQ_WMI) += peaq-wmi.o
|
|
obj-$(CONFIG_SURFACE3_WMI) += surface3-wmi.o
|
|
+obj-$(CONFIG_SURFACE_BOOK2_DGPU_HPS) += surfacebook2_dgpu_hps.o
|
|
obj-$(CONFIG_TOPSTAR_LAPTOP) += topstar-laptop.o
|
|
obj-$(CONFIG_WMI_BMOF) += wmi-bmof.o
|
|
obj-$(CONFIG_INTEL_WMI_THUNDERBOLT) += intel-wmi-thunderbolt.o
|
|
diff --git a/drivers/platform/x86/surfacebook2_dgpu_hps.c b/drivers/platform/x86/surfacebook2_dgpu_hps.c
|
|
new file mode 100644
|
|
index 000000000000..7639fb0029d8
|
|
--- /dev/null
|
|
+++ b/drivers/platform/x86/surfacebook2_dgpu_hps.c
|
|
@@ -0,0 +1,306 @@
|
|
+#include <linux/acpi.h>
|
|
+#include <linux/gpio.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/moduleparam.h>
|
|
+#include <linux/platform_device.h>
|
|
+#include <linux/sysfs.h>
|
|
+
|
|
+#include <linux/uaccess.h>
|
|
+
|
|
+
|
|
+#define SB2_SHPS_DSM_REVISION 1
|
|
+#define SB2_SHPS_DSM_GPU_STATE 0x05
|
|
+
|
|
+static const guid_t SB2_SHPS_DSM_UUID =
|
|
+ GUID_INIT(0x5515a847, 0xed55, 0x4b27, 0x83, 0x52, 0xcd,
|
|
+ 0x32, 0x0e, 0x10, 0x36, 0x0a);
|
|
+
|
|
+#define SB2_PARAM_PERM (S_IRUGO | S_IWUSR)
|
|
+
|
|
+
|
|
+static const struct acpi_gpio_params gpio_base_presence_int = { 0, 0, false };
|
|
+static const struct acpi_gpio_params gpio_base_presence = { 1, 0, false };
|
|
+static const struct acpi_gpio_params gpio_dgpu_power_int = { 2, 0, false };
|
|
+static const struct acpi_gpio_params gpio_dgpu_power = { 3, 0, false };
|
|
+static const struct acpi_gpio_params gpio_dgpu_presence_int = { 4, 0, false };
|
|
+static const struct acpi_gpio_params gpio_dgpu_presence = { 5, 0, false };
|
|
+
|
|
+static const struct acpi_gpio_mapping sb2_mshw0153_acpi_gpios[] = {
|
|
+ { "base_presence-int-gpio", &gpio_base_presence_int, 1 },
|
|
+ { "base_presence-gpio", &gpio_base_presence, 1 },
|
|
+ { "dgpu_power-int-gpio", &gpio_dgpu_power_int, 1 },
|
|
+ { "dgpu_power-gpio", &gpio_dgpu_power, 1 },
|
|
+ { "dgpu_presence-int-gpio", &gpio_dgpu_presence_int, 1 },
|
|
+ { "dgpu_presence-gpio", &gpio_dgpu_presence, 1 },
|
|
+ { },
|
|
+};
|
|
+
|
|
+
|
|
+enum sb2_dgpu_power {
|
|
+ SB2_DGPU_POWER_OFF = 0,
|
|
+ SB2_DGPU_POWER_ON = 1,
|
|
+
|
|
+ __SB2_DGPU_POWER__START = 0,
|
|
+ __SB2_DGPU_POWER__END = 1,
|
|
+};
|
|
+
|
|
+enum sb2_param_dgpu_power {
|
|
+ SB2_PARAM_DGPU_POWER_OFF = SB2_DGPU_POWER_OFF,
|
|
+ SB2_PARAM_DGPU_POWER_ON = SB2_DGPU_POWER_ON,
|
|
+ SB2_PARAM_DGPU_POWER_AS_IS = 2,
|
|
+
|
|
+ __SB2_PARAM_DGPU_POWER__START = 0,
|
|
+ __SB2_PARAM_DGPU_POWER__END = 2,
|
|
+};
|
|
+
|
|
+static const char* sb2_dgpu_power_str(enum sb2_dgpu_power power) {
|
|
+ if (power == SB2_DGPU_POWER_OFF) {
|
|
+ return "off";
|
|
+ } else if (power == SB2_DGPU_POWER_ON) {
|
|
+ return "on";
|
|
+ } else {
|
|
+ return "<invalid>";
|
|
+ }
|
|
+}
|
|
+
|
|
+
|
|
+struct sb2_shps_driver_data {
|
|
+ struct mutex dgpu_power_lock;
|
|
+ enum sb2_dgpu_power dgpu_power;
|
|
+};
|
|
+
|
|
+
|
|
+static int __sb2_shps_dgpu_set_power(struct platform_device *pdev, enum sb2_dgpu_power power)
|
|
+{
|
|
+ struct sb2_shps_driver_data *drvdata = platform_get_drvdata(pdev);
|
|
+ acpi_handle handle = ACPI_HANDLE(&pdev->dev);
|
|
+ union acpi_object *result;
|
|
+ union acpi_object param;
|
|
+
|
|
+ param.type = ACPI_TYPE_INTEGER;
|
|
+ param.integer.value = power == SB2_DGPU_POWER_ON;
|
|
+
|
|
+ result = acpi_evaluate_dsm_typed(handle, &SB2_SHPS_DSM_UUID, SB2_SHPS_DSM_REVISION,
|
|
+ SB2_SHPS_DSM_GPU_STATE, ¶m, ACPI_TYPE_BUFFER);
|
|
+
|
|
+ if (IS_ERR_OR_NULL(result)) {
|
|
+ return result ? PTR_ERR(result) : -EFAULT;
|
|
+ }
|
|
+
|
|
+ if (result->buffer.length != 1 || result->buffer.pointer[0] != 0) {
|
|
+ return -EIO;
|
|
+ }
|
|
+
|
|
+ drvdata->dgpu_power = power;
|
|
+
|
|
+ printk(KERN_INFO "sb2_shps: dGPU power state set to \'%s\'\n", sb2_dgpu_power_str(power));
|
|
+
|
|
+ ACPI_FREE(result);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int sb2_shps_dgpu_set_power(struct platform_device *pdev, enum sb2_dgpu_power power)
|
|
+{
|
|
+ struct sb2_shps_driver_data *drvdata = platform_get_drvdata(pdev);
|
|
+ int status = 0;
|
|
+
|
|
+ if (power < __SB2_DGPU_POWER__START || power > __SB2_DGPU_POWER__END) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ mutex_lock(&drvdata->dgpu_power_lock);
|
|
+ if (power != drvdata->dgpu_power) {
|
|
+ status = __sb2_shps_dgpu_set_power(pdev, power);
|
|
+ }
|
|
+ mutex_unlock(&drvdata->dgpu_power_lock);
|
|
+
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static int sb2_shps_dgpu_force_power(struct platform_device *pdev, enum sb2_dgpu_power power)
|
|
+{
|
|
+ struct sb2_shps_driver_data *drvdata = platform_get_drvdata(pdev);
|
|
+ int status;
|
|
+
|
|
+ if (power < __SB2_DGPU_POWER__START || power > __SB2_DGPU_POWER__END) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ mutex_lock(&drvdata->dgpu_power_lock);
|
|
+ status = __sb2_shps_dgpu_set_power(pdev, power);
|
|
+ mutex_unlock(&drvdata->dgpu_power_lock);
|
|
+
|
|
+ return status;
|
|
+}
|
|
+
|
|
+
|
|
+static int param_dgpu_power_set(const char *val, const struct kernel_param *kp)
|
|
+{
|
|
+ int power = SB2_PARAM_DGPU_POWER_OFF;
|
|
+ int status;
|
|
+
|
|
+ status = kstrtoint(val, 0, &power);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ if (power < __SB2_PARAM_DGPU_POWER__START || power > __SB2_PARAM_DGPU_POWER__END) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ return param_set_int(val, kp);
|
|
+}
|
|
+
|
|
+static const struct kernel_param_ops param_dgpu_power_ops = {
|
|
+ .set = param_dgpu_power_set,
|
|
+ .get = param_get_int,
|
|
+};
|
|
+
|
|
+static int param_dgpu_power_init = SB2_PARAM_DGPU_POWER_OFF;
|
|
+static int param_dgpu_power_exit = SB2_PARAM_DGPU_POWER_OFF;
|
|
+
|
|
+module_param_cb(dgpu_power_init, ¶m_dgpu_power_ops, ¶m_dgpu_power_init, SB2_PARAM_PERM);
|
|
+module_param_cb(dgpu_power_exit, ¶m_dgpu_power_ops, ¶m_dgpu_power_exit, SB2_PARAM_PERM);
|
|
+
|
|
+MODULE_PARM_DESC(dgpu_power_init, "dGPU power state to be set on init (0: off / 1: on / 2: as-is)");
|
|
+MODULE_PARM_DESC(dgpu_power_exit, "dGPU power state to be set on exit (0: off / 1: on / 2: as-is)");
|
|
+
|
|
+
|
|
+static ssize_t dgpu_power_show(struct device *dev, struct device_attribute *attr, char *data)
|
|
+{
|
|
+ struct platform_device *pdev = container_of(dev, struct platform_device, dev);
|
|
+ struct sb2_shps_driver_data *drvdata = platform_get_drvdata(pdev);
|
|
+
|
|
+ return sprintf(data, "%s\n", sb2_dgpu_power_str(drvdata->dgpu_power));
|
|
+}
|
|
+
|
|
+static ssize_t dgpu_power_store(struct device *dev, struct device_attribute *attr,
|
|
+ const char *data, size_t count)
|
|
+{
|
|
+ struct platform_device *pdev = container_of(dev, struct platform_device, dev);
|
|
+ bool power = false;
|
|
+ int status;
|
|
+
|
|
+ status = kstrtobool(data, &power);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ if (power) {
|
|
+ status = sb2_shps_dgpu_set_power(pdev, SB2_DGPU_POWER_ON);
|
|
+ } else {
|
|
+ status = sb2_shps_dgpu_set_power(pdev, SB2_DGPU_POWER_OFF);
|
|
+ }
|
|
+
|
|
+ return status < 0 ? status : count;
|
|
+}
|
|
+
|
|
+const static DEVICE_ATTR_RW(dgpu_power);
|
|
+
|
|
+
|
|
+#ifdef CONFIG_PM
|
|
+
|
|
+static int sb2_shps_resume(struct device *dev)
|
|
+{
|
|
+ struct platform_device *pdev = container_of(dev, struct platform_device, dev);
|
|
+ struct sb2_shps_driver_data *drvdata = platform_get_drvdata(pdev);
|
|
+
|
|
+ return sb2_shps_dgpu_force_power(pdev, drvdata->dgpu_power);
|
|
+}
|
|
+
|
|
+static SIMPLE_DEV_PM_OPS(sb2_shps_pm_ops, NULL, sb2_shps_resume);
|
|
+
|
|
+#endif
|
|
+
|
|
+
|
|
+static int sb2_shps_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct sb2_shps_driver_data *drvdata;
|
|
+ struct acpi_device *shps_dev = ACPI_COMPANION(&pdev->dev);
|
|
+ int status = 0;
|
|
+
|
|
+ if (gpiod_count(&pdev->dev, NULL) < 0) {
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
+ status = acpi_dev_add_driver_gpios(shps_dev, sb2_mshw0153_acpi_gpios);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ drvdata = kzalloc(sizeof(struct sb2_shps_driver_data), GFP_KERNEL);
|
|
+ if (!drvdata) {
|
|
+ status = -ENOMEM;
|
|
+ goto err_alloc_drvdata;
|
|
+ }
|
|
+
|
|
+ mutex_init(&drvdata->dgpu_power_lock);
|
|
+ drvdata->dgpu_power = SB2_DGPU_POWER_OFF;
|
|
+ platform_set_drvdata(pdev, drvdata);
|
|
+
|
|
+ if (param_dgpu_power_init != SB2_PARAM_DGPU_POWER_AS_IS) {
|
|
+ status = sb2_shps_dgpu_force_power(pdev, param_dgpu_power_init);
|
|
+ if (status) {
|
|
+ goto err_set_power;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ status = sysfs_create_file(&pdev->dev.kobj, &dev_attr_dgpu_power.attr);
|
|
+ if (status) {
|
|
+ goto err_sysfs;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_sysfs:
|
|
+ sb2_shps_dgpu_force_power(pdev, SB2_DGPU_POWER_OFF);
|
|
+err_set_power:
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
+ kfree(drvdata);
|
|
+err_alloc_drvdata:
|
|
+ acpi_dev_remove_driver_gpios(shps_dev);
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static int sb2_shps_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct sb2_shps_driver_data *drvdata = platform_get_drvdata(pdev);
|
|
+ struct acpi_device *shps_dev = ACPI_COMPANION(&pdev->dev);
|
|
+
|
|
+ sysfs_remove_file(&pdev->dev.kobj, &dev_attr_dgpu_power.attr);
|
|
+
|
|
+ if (param_dgpu_power_exit != SB2_PARAM_DGPU_POWER_AS_IS) {
|
|
+ sb2_shps_dgpu_set_power(pdev, param_dgpu_power_exit);
|
|
+ }
|
|
+ acpi_dev_remove_driver_gpios(shps_dev);
|
|
+
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
+ kfree(drvdata);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static const struct acpi_device_id sb2_shps_acpi_match[] = {
|
|
+ { "MSHW0153", 0 },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(acpi, sb2_shps_acpi_match);
|
|
+
|
|
+static struct platform_driver sb2_shps_driver = {
|
|
+ .probe = sb2_shps_probe,
|
|
+ .remove = sb2_shps_remove,
|
|
+ .driver = {
|
|
+ .name = "sb2_shps",
|
|
+ .acpi_match_table = ACPI_PTR(sb2_shps_acpi_match),
|
|
+#ifdef CONFIG_PM
|
|
+ .pm = &sb2_shps_pm_ops,
|
|
+#endif
|
|
+ },
|
|
+};
|
|
+module_platform_driver(sb2_shps_driver);
|
|
+
|
|
+MODULE_AUTHOR("Maximilian Luz <luzmaximilian@gmail.com>");
|
|
+MODULE_DESCRIPTION("Surface Book 2 Hot-Plug System Driver");
|
|
+MODULE_LICENSE("GPL v2");
|
|
--
|
|
2.23.0
|
|
|