ptxdist gadget hid change packet size

I'm using ptxdist. I've enabled the gadget hid driver and it is working
great. Only problem is that the maximum packet size is 8 bytes. I would
like to increase the packet size to the maximum (which is 64 bytes for
hid).

I've defined a custom device and report descriptor (see below) and they are
working fine. I've also created two custom endpoints and I am able to
communicate over them.

I have two questions:

1.) To increase the packet size I still need to change the configuration
descriptor but I cant find the file/location where I can change this. Which
file contains the configuration descriptor for gadget hid?
2.) The labels used in the descriptors below (for example: .bLength), where
are they defined?

*** device descriptor (drivers/usb/gadget/hid.c):

static struct usb_device_descriptor device_desc = {

    .bLength     = sizeof device_desc,
    .bDescriptorType   = USB_DT_DEVICE,
    .bcdUSB     = cpu_to_le16(0x0200),
    .bDeviceClass   = 0x00,
    .bDeviceSubClass   = 0x00,
    .bDeviceProtocol   = 0x00,
    .wMaxPacketSize   = 0x40,
    .idVendor     = cpu_to_le16(HIDG_VENDOR_NUM),
    .idProduct     = cpu_to_le16(HIDG_PRODUCT_NUM),
    .bcdDevice    = cpu_to_le16(0x0200),
    .iManufacturer  = 1,
    .iProduct     = 2,
    .iSerial    = 3,
    .bNumConfigurations = 0x01
};

*** report descriptor (arch/arm/mach-s3c2440/mach-mini2440.c):

static struct hidg_func_descriptor my_hid_data = {
  .subclass    = 0,
  .protocol    = 1,
  .report_length    = 8,
  .report_desc_length  = 37,
  .report_desc    = {
    0x05, 0x8C,              
    0x09, 0x01,
    0xa1, 0x01,

    0x85, IN_DATA,
    0x95, IN_DATA_SIZE,
    0x75, 0x08,
    0x26, 0xff, 0x00,
    0x15, 0x00,
    0x09, 0x01,
    0x81, 0x02,

    0x85, OUT_DATA,
    0x95, OUT_DATA_SIZE,
    0x75, 0x08,
    0x26, 0xff, 0x00,
    0x15, 0x00,
    0x09, 0x01,
    0x91, 0x02,

    0xC0
  }
};

Sounds like a question you should ask on the Linux kernel USB mailing list.

My descriptors are fine. The only thing I still needed to do was to set the
report_length in the my_hid_data descriptor to 64.

Now I'm able to transfer 64 bytes over HID!!