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Message-Id: <20221017233510.53336-1-andriy.shevchenko@linux.intel.com>
Date: Tue, 18 Oct 2022 02:35:10 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Andrey Smirnov <andrew.smirnov@...il.com>,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
Steev Klimaszewski <steev@...i.org>
Subject: [PATCH v1 1/1] usb: dwc3: Don't switch OTG -> peripheral if extcon is present
From: Andrey Smirnov <andrew.smirnov@...il.com>
If the extcon device exists, get the mode from the extcon device. If
the controller is DRD and the driver is unable to determine the mode,
only then default the dr_mode to USB_DR_MODE_PERIPHERAL.
Reported-by: Steev Klimaszewski <steev@...i.org>
Fixes: 7a84e7353e23 ("Revert "usb: dwc3: Don't switch OTG -> peripheral if extcon is present"")
Reviewed-by: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/usb/dwc3/core.c | 49 +++++++++++++++++++++++++++++++++++++++-
drivers/usb/dwc3/drd.c | 50 -----------------------------------------
2 files changed, 48 insertions(+), 51 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index ea51624461b5..c0e7c76dc5c8 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -23,6 +23,7 @@
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/of.h>
+#include <linux/of_graph.h>
#include <linux/acpi.h>
#include <linux/pinctrl/consumer.h>
#include <linux/reset.h>
@@ -85,7 +86,7 @@ static int dwc3_get_dr_mode(struct dwc3 *dwc)
* mode. If the controller supports DRD but the dr_mode is not
* specified or set to OTG, then set the mode to peripheral.
*/
- if (mode == USB_DR_MODE_OTG &&
+ if (mode == USB_DR_MODE_OTG && !dwc->edev &&
(!IS_ENABLED(CONFIG_USB_ROLE_SWITCH) ||
!device_property_read_bool(dwc->dev, "usb-role-switch")) &&
!DWC3_VER_IS_PRIOR(DWC3, 330A))
@@ -1690,6 +1691,46 @@ static void dwc3_check_params(struct dwc3 *dwc)
}
}
+static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
+{
+ struct device *dev = dwc->dev;
+ struct device_node *np_phy;
+ struct extcon_dev *edev = NULL;
+ const char *name;
+
+ if (device_property_read_bool(dev, "extcon"))
+ return extcon_get_edev_by_phandle(dev, 0);
+
+ /*
+ * Device tree platforms should get extcon via phandle.
+ * On ACPI platforms, we get the name from a device property.
+ * This device property is for kernel internal use only and
+ * is expected to be set by the glue code.
+ */
+ if (device_property_read_string(dev, "linux,extcon-name", &name) == 0)
+ return extcon_get_extcon_dev(name);
+
+ /*
+ * Try to get an extcon device from the USB PHY controller's "port"
+ * node. Check if it has the "port" node first, to avoid printing the
+ * error message from underlying code, as it's a valid case: extcon
+ * device (and "port" node) may be missing in case of "usb-role-switch"
+ * or OTG mode.
+ */
+ np_phy = of_parse_phandle(dev->of_node, "phys", 0);
+ if (of_graph_is_present(np_phy)) {
+ struct device_node *np_conn;
+
+ np_conn = of_graph_get_remote_node(np_phy, -1, -1);
+ if (np_conn)
+ edev = extcon_find_edev_by_node(np_conn);
+ of_node_put(np_conn);
+ }
+ of_node_put(np_phy);
+
+ return edev;
+}
+
static int dwc3_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1840,6 +1881,12 @@ static int dwc3_probe(struct platform_device *pdev)
goto err2;
}
+ dwc->edev = dwc3_get_extcon(dwc);
+ if (IS_ERR(dwc->edev)) {
+ ret = dev_err_probe(dwc->dev, PTR_ERR(dwc->edev), "failed to get extcon\n");
+ goto err3;
+ }
+
ret = dwc3_get_dr_mode(dwc);
if (ret)
goto err3;
diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
index 8cad9e7d3368..039bf241769a 100644
--- a/drivers/usb/dwc3/drd.c
+++ b/drivers/usb/dwc3/drd.c
@@ -8,7 +8,6 @@
*/
#include <linux/extcon.h>
-#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/property.h>
@@ -439,51 +438,6 @@ static int dwc3_drd_notifier(struct notifier_block *nb,
return NOTIFY_DONE;
}
-static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
-{
- struct device *dev = dwc->dev;
- struct device_node *np_phy;
- struct extcon_dev *edev = NULL;
- const char *name;
-
- if (device_property_read_bool(dev, "extcon"))
- return extcon_get_edev_by_phandle(dev, 0);
-
- /*
- * Device tree platforms should get extcon via phandle.
- * On ACPI platforms, we get the name from a device property.
- * This device property is for kernel internal use only and
- * is expected to be set by the glue code.
- */
- if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) {
- edev = extcon_get_extcon_dev(name);
- if (!edev)
- return ERR_PTR(-EPROBE_DEFER);
-
- return edev;
- }
-
- /*
- * Try to get an extcon device from the USB PHY controller's "port"
- * node. Check if it has the "port" node first, to avoid printing the
- * error message from underlying code, as it's a valid case: extcon
- * device (and "port" node) may be missing in case of "usb-role-switch"
- * or OTG mode.
- */
- np_phy = of_parse_phandle(dev->of_node, "phys", 0);
- if (of_graph_is_present(np_phy)) {
- struct device_node *np_conn;
-
- np_conn = of_graph_get_remote_node(np_phy, -1, -1);
- if (np_conn)
- edev = extcon_find_edev_by_node(np_conn);
- of_node_put(np_conn);
- }
- of_node_put(np_phy);
-
- return edev;
-}
-
#if IS_ENABLED(CONFIG_USB_ROLE_SWITCH)
#define ROLE_SWITCH 1
static int dwc3_usb_role_switch_set(struct usb_role_switch *sw,
@@ -588,10 +542,6 @@ int dwc3_drd_init(struct dwc3 *dwc)
device_property_read_bool(dwc->dev, "usb-role-switch"))
return dwc3_setup_role_switch(dwc);
- dwc->edev = dwc3_get_extcon(dwc);
- if (IS_ERR(dwc->edev))
- return PTR_ERR(dwc->edev);
-
if (dwc->edev) {
dwc->edev_nb.notifier_call = dwc3_drd_notifier;
ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST,
--
2.35.1
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