From: Li Jun <jun...@nxp.com>
If one of functions is not super speed capable, we need force the udc
to be high speed, this is an equivalent implementation of
usb_gadget_udc_set_speed() in kernel but simple, which set the gadget
max_speed to be high speed, so afterwards when start gadget duc can
set the HW to be USB 2.0 mode.
Reviewed-by: Ye Li <ye...@nxp.com>
Reviewed-by: Peter Chen <peter.c...@nxp.com>
Tested-by: faqiang.zhu <faqiang....@nxp.com>
Signed-off-by: Li Jun <jun...@nxp.com>
Signed-off-by: Peng Fan <peng....@nxp.com>
---
drivers/usb/gadget/composite.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 1063c571d8..2a309e624e 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -532,6 +532,19 @@ int usb_add_config(struct usb_composite_dev *cdev,
}
}
+ /*
+ * If one function of config is not super speed capable,
+ * force the gadget to be high speed so controller driver
+ * can init HW to be USB 2.0
+ */
+ if (gadget_is_superspeed(cdev->gadget)) {
+ list_for_each_entry(f, &config->functions, list) {
+ if (!f->ss_descriptors)
+ cdev->gadget->max_speed =
+ USB_SPEED_HIGH;
+ }
+ }
+
usb_ep_autoconfig_reset(cdev->gadget);
os_desc_config = config;
--
2.28.0
