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build/patch/kernel/archive/rockchip64-5.18/general-add-miniDP-virtual-extcon.patch

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diff --git a/MAINTAINERS b/MAINTAINERS
index 68f21d46614c..aeb161b19dae 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6466,6 +6466,12 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git
F: Documentation/filesystems/ext4/
F: fs/ext4/
+EXTCON DRIVER FOR TYPE-C VIRTUAL PD
+M: Jagan Teki <jagan@amarulasolutions.com>
+S: Maintained
+F: Documentation/devicetree/bindings/extcon/extcon-usbc-virtual-pd.yaml
+F: drivers/extcon/extcon-usbc-virtual-pd.c
+
Extended Verification Module (EVM)
M: Mimi Zohar <zohar@linux.ibm.com>
L: linux-integrity@vger.kernel.org
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index aac507bff135..edd6c3c52699 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -186,4 +186,14 @@ config EXTCON_USBC_CROS_EC
Say Y here to enable USB Type C cable detection extcon support when
using Chrome OS EC based USB Type-C ports.
+config EXTCON_USBC_VIRTUAL_PD
+ tristate "Virtual Type-C PD EXTCON support"
+ depends on GPIOLIB || COMPILE_TEST
+ help
+ Say Y here to enable Virtual Type-C PD extcon driver support, if
+ hardware platform designed Type-C modes separately.
+
+ Example, of designing Display Port separately from Type-C Altmode
+ instead of accessing Altmode Display Port in Type-C connector.
+
endif
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index 52096fd8a216..c35191eef0e1 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -25,3 +25,4 @@ obj-$(CONFIG_EXTCON_RT8973A) += extcon-rt8973a.o
obj-$(CONFIG_EXTCON_USB_GPIO) += extcon-usb-gpio.o
obj-$(CONFIG_EXTCON_USBC_CROS_EC) += extcon-usbc-cros-ec.o
obj-$(CONFIG_EXTCON_USBC_TUSB320) += extcon-usbc-tusb320.o
+obj-$(CONFIG_EXTCON_USBC_VIRTUAL_PD) += extcon-usbc-virtual-pd.o
diff --git a/drivers/extcon/extcon-usbc-virtual-pd.c b/drivers/extcon/extcon-usbc-virtual-pd.c
new file mode 100644
index 000000000000..e0713670e33d
--- /dev/null
+++ b/drivers/extcon/extcon-usbc-virtual-pd.c
@@ -0,0 +1,285 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Type-C Virtual PD Extcon driver
+ *
+ * Copyright (c) 2019 Fuzhou Rockchip Electronics Co., Ltd
+ * Copyright (c) 2019 Radxa Limited
+ * Copyright (c) 2019 Amarula Solutions(India)
+ */
+
+#include <linux/extcon-provider.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+static const unsigned int vpd_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_DISP_DP,
+ EXTCON_NONE,
+};
+
+enum vpd_data_role {
+ DR_NONE,
+ DR_HOST,
+ DR_DEVICE,
+ DR_DISPLAY_PORT,
+};
+
+enum vpd_polarity {
+ POLARITY_NORMAL,
+ POLARITY_FLIP,
+};
+
+enum vpd_usb_ss {
+ USB_SS_USB2,
+ USB_SS_USB3,
+};
+
+struct vpd_extcon {
+ struct device *dev;
+ struct extcon_dev *extcon;
+ struct gpio_desc *det_gpio;
+
+ u8 polarity;
+ u8 usb_ss;
+ enum vpd_data_role data_role;
+
+ int irq;
+ bool enable_irq;
+ struct work_struct work;
+ struct delayed_work irq_work;
+};
+
+static void vpd_extcon_irq_work(struct work_struct *work)
+{
+ struct vpd_extcon *vpd = container_of(work, struct vpd_extcon, irq_work.work);
+ bool host_connected = false, device_connected = false, dp_connected = false;
+ union extcon_property_value property;
+ int det;
+
+ det = vpd->det_gpio ? gpiod_get_raw_value(vpd->det_gpio) : 0;
+ if (det) {
+ device_connected = (vpd->data_role == DR_DEVICE) ? true : false;
+ host_connected = (vpd->data_role == DR_HOST) ? true : false;
+ dp_connected = (vpd->data_role == DR_DISPLAY_PORT) ? true : false;
+ }
+
+ extcon_set_state(vpd->extcon, EXTCON_USB, host_connected);
+ extcon_set_state(vpd->extcon, EXTCON_USB_HOST, device_connected);
+ extcon_set_state(vpd->extcon, EXTCON_DISP_DP, dp_connected);
+
+ property.intval = vpd->polarity;
+ extcon_set_property(vpd->extcon, EXTCON_USB,
+ EXTCON_PROP_USB_TYPEC_POLARITY, property);
+ extcon_set_property(vpd->extcon, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_TYPEC_POLARITY, property);
+ extcon_set_property(vpd->extcon, EXTCON_DISP_DP,
+ EXTCON_PROP_USB_TYPEC_POLARITY, property);
+
+ property.intval = vpd->usb_ss;
+ extcon_set_property(vpd->extcon, EXTCON_USB,
+ EXTCON_PROP_USB_SS, property);
+ extcon_set_property(vpd->extcon, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_SS, property);
+ extcon_set_property(vpd->extcon, EXTCON_DISP_DP,
+ EXTCON_PROP_USB_SS, property);
+
+ extcon_sync(vpd->extcon, EXTCON_USB);
+ extcon_sync(vpd->extcon, EXTCON_USB_HOST);
+ extcon_sync(vpd->extcon, EXTCON_DISP_DP);
+}
+
+static irqreturn_t vpd_extcon_irq_handler(int irq, void *dev_id)
+{
+ struct vpd_extcon *vpd = dev_id;
+
+ schedule_delayed_work(&vpd->irq_work, msecs_to_jiffies(10));
+
+ return IRQ_HANDLED;
+}
+
+static enum vpd_data_role vpd_extcon_data_role(struct vpd_extcon *vpd)
+{
+ const char *const data_roles[] = {
+ [DR_NONE] = "NONE",
+ [DR_HOST] = "host",
+ [DR_DEVICE] = "device",
+ [DR_DISPLAY_PORT] = "display-port",
+ };
+ struct device *dev = vpd->dev;
+ int ret;
+ const char *dr;
+
+ ret = device_property_read_string(dev, "vpd-data-role", &dr);
+ if (ret < 0)
+ return DR_NONE;
+
+ ret = match_string(data_roles, ARRAY_SIZE(data_roles), dr);
+
+ return (ret < 0) ? DR_NONE : ret;
+}
+
+static int vpd_extcon_parse_dts(struct vpd_extcon *vpd)
+{
+ struct device *dev = vpd->dev;
+ bool val = false;
+ int ret;
+
+ val = device_property_read_bool(dev, "vpd-polarity");
+ if (val)
+ vpd->polarity = POLARITY_FLIP;
+ else
+ vpd->polarity = POLARITY_NORMAL;
+
+ val = device_property_read_bool(dev, "vpd-super-speed");
+ if (val)
+ vpd->usb_ss = USB_SS_USB3;
+ else
+ vpd->usb_ss = USB_SS_USB2;
+
+ vpd->data_role = vpd_extcon_data_role(vpd);
+
+ vpd->det_gpio = devm_gpiod_get_optional(dev, "det", GPIOD_OUT_LOW);
+ if (IS_ERR(vpd->det_gpio)) {
+ ret = PTR_ERR(vpd->det_gpio);
+ dev_warn(dev, "failed to get det gpio: %d\n", ret);
+ return ret;
+ }
+
+ vpd->irq = gpiod_to_irq(vpd->det_gpio);
+ if (vpd->irq < 0) {
+ dev_err(dev, "failed to get irq for gpio: %d\n", vpd->irq);
+ return vpd->irq;
+ }
+
+ ret = devm_request_threaded_irq(dev, vpd->irq, NULL,
+ vpd_extcon_irq_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ NULL, vpd);
+ if (ret)
+ dev_err(dev, "failed to request gpio irq\n");
+
+ return ret;
+}
+
+static int vpd_extcon_probe(struct platform_device *pdev)
+{
+ struct vpd_extcon *vpd;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ vpd = devm_kzalloc(dev, sizeof(*vpd), GFP_KERNEL);
+ if (!vpd)
+ return -ENOMEM;
+
+ vpd->dev = dev;
+ ret = vpd_extcon_parse_dts(vpd);
+ if (ret)
+ return ret;
+
+ INIT_DELAYED_WORK(&vpd->irq_work, vpd_extcon_irq_work);
+
+ vpd->extcon = devm_extcon_dev_allocate(dev, vpd_cable);
+ if (IS_ERR(vpd->extcon)) {
+ dev_err(dev, "allocat extcon failed\n");
+ return PTR_ERR(vpd->extcon);
+ }
+
+ ret = devm_extcon_dev_register(dev, vpd->extcon);
+ if (ret) {
+ dev_err(dev, "register extcon failed: %d\n", ret);
+ return ret;
+ }
+
+ extcon_set_property_capability(vpd->extcon, EXTCON_USB,
+ EXTCON_PROP_USB_VBUS);
+ extcon_set_property_capability(vpd->extcon, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_VBUS);
+
+ extcon_set_property_capability(vpd->extcon, EXTCON_USB,
+ EXTCON_PROP_USB_TYPEC_POLARITY);
+ extcon_set_property_capability(vpd->extcon, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_TYPEC_POLARITY);
+ extcon_set_property_capability(vpd->extcon, EXTCON_USB,
+ EXTCON_PROP_USB_SS);
+ extcon_set_property_capability(vpd->extcon, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_SS);
+
+ extcon_set_property_capability(vpd->extcon, EXTCON_DISP_DP,
+ EXTCON_PROP_USB_SS);
+ extcon_set_property_capability(vpd->extcon, EXTCON_DISP_DP,
+ EXTCON_PROP_USB_TYPEC_POLARITY);
+
+ platform_set_drvdata(pdev, vpd);
+
+ vpd_extcon_irq_work(&vpd->irq_work.work);
+
+ return 0;
+}
+
+static int vpd_extcon_remove(struct platform_device *pdev)
+{
+ struct vpd_extcon *vpd = platform_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&vpd->irq_work);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int vpd_extcon_suspend(struct device *dev)
+{
+ struct vpd_extcon *vpd = dev_get_drvdata(dev);
+
+ if (!vpd->enable_irq) {
+ disable_irq_nosync(vpd->irq);
+ vpd->enable_irq = true;
+ }
+
+ return 0;
+}
+
+static int vpd_extcon_resume(struct device *dev)
+{
+ struct vpd_extcon *vpd = dev_get_drvdata(dev);
+
+ if (vpd->enable_irq) {
+ enable_irq(vpd->irq);
+ vpd->enable_irq = false;
+ }
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(vpd_extcon_pm_ops,
+ vpd_extcon_suspend, vpd_extcon_resume);
+
+static const struct of_device_id vpd_extcon_dt_match[] = {
+ { .compatible = "linux,extcon-usbc-virtual-pd", },
+ { /* sentinel */ }
+};
+
+static struct platform_driver vpd_extcon_driver = {
+ .probe = vpd_extcon_probe,
+ .remove = vpd_extcon_remove,
+ .driver = {
+ .name = "extcon-usbc-virtual-pd",
+ .pm = &vpd_extcon_pm_ops,
+ .of_match_table = vpd_extcon_dt_match,
+ },
+};
+
+module_platform_driver(vpd_extcon_driver);
+
+MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
+MODULE_DESCRIPTION("Type-C Virtual PD extcon driver");
+MODULE_LICENSE("GPL v2");
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