From: Prashanth K quic_prashk@quicinc.com
commit 8e21a620c7e6e00347ade1a6ed4967b359eada5a upstream.
Currently if we bootup a device without cable connected, then usb-conn-gpio won't call set_role() because last_role is same as current role. This happens since last_role gets initialised to zero during the probe.
To avoid this, add a new flag initial_detection into struct usb_conn_info, which prevents bailing out during initial detection.
Cc: stable@vger.kernel.org # 5.4 Fixes: 4602f3bff266 ("usb: common: add USB GPIO based connection detection driver") Signed-off-by: Prashanth K quic_prashk@quicinc.com Tested-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Reviewed-by: Heikki Krogerus heikki.krogerus@linux.intel.com Link: https://lore.kernel.org/r/1690880632-12588-1-git-send-email-quic_prashk@quic... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/common/usb-conn-gpio.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/usb/common/usb-conn-gpio.c +++ b/drivers/usb/common/usb-conn-gpio.c @@ -38,6 +38,7 @@ struct usb_conn_info { struct gpio_desc *vbus_gpiod; int id_irq; int vbus_irq; + bool initial_detection; };
/** @@ -82,11 +83,13 @@ static void usb_conn_detect_cable(struct dev_dbg(info->dev, "role %d/%d, gpios: id %d, vbus %d\n", info->last_role, role, id, vbus);
- if (info->last_role == role) { + if (!info->initial_detection && info->last_role == role) { dev_warn(info->dev, "repeated role: %d\n", role); return; }
+ info->initial_detection = false; + if (info->last_role == USB_ROLE_HOST) regulator_disable(info->vbus);
@@ -206,6 +209,7 @@ static int usb_conn_probe(struct platfor platform_set_drvdata(pdev, info);
/* Perform initial detection */ + info->initial_detection = true; usb_conn_queue_dwork(info, 0);
return 0;