Android Lollypop hid_function_bind_config failed about android-keyboard-gadget HOT 3 CLOSED

What device is this? Who built the kernel?

On Fri, Aug 5, 2016 at 6:10 PM, ajit1433 [email protected] wrote:

I am trying to add HID functionality to my device but i keep getting the
hid_function_bind_config failed error.

Below is output while booting device...

[ 3.782222] adb_android_function_enable ...1
[ 3.786518] ==kcj enable_store dev->enabled:1
[ 3.791609] ==kcj enable_store
[ 3.794741] ==kcj enable_store dev->enabled:0
[ 3.799429] ==kcj enable_store
[ 3.802525] ==kcj enable_store..2
[ 3.805896] adb_android_function_enable ...1
[ 3.810220] ==kcj enable_store dev->enabled:1
[ 3.817129] adb_open
[ 3.819438] hid keyboard
[ 3.822014] hidg_bind: creating device d6f3e700
[ 3.827827] android_usb gadget: hidg_bind FAILED
[ 3.832534] hid_function_bind_config: hid_function_bind_config keyboard
failed: -19
[ 3.841698] android_bind_enabled_functions: hid failed

Please help.

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from android-keyboard-gadget.

Hi,

Following are the details:

Android OS Version:
ro.build.version.sdk=17
ro.build.version.codename=REL
ro.build.version.release=4.2
......
ro.product.name=rk2928sdk
ro.product.device=rk2928sdk
ro.product.board=rk2928sdk
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
....
ro.board.platform=rk2928
ro.build.product=rk2928sdk

Kernel Version:
Linux version 3.0.36+ (gcc version 4.6.x-google 20120106 (prerelease) (GCC) )

from android-keyboard-gadget.

Figured it out...

Initially .wMaxPacketSize was set dynamically in kernel/drivers/usb/gadget/f_hid.c

After modification i set it to 64:
/* High-Speed Support /
static struct usb_endpoint_descriptor hidg_hs_in_ep_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = 64,
.bInterval = 4,
};
...
/ Full-Speed Support */
static struct usb_endpoint_descriptor hidg_fs_in_ep_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = 64,
.bInterval = 10,
};

from android-keyboard-gadget.