usb: gadget: uvc: Use macro for interrupt endpoint status size instead of using a MAGIC number
This patch adds a MACRO for the UVC video control status (interrupt) endpoint and removes the magic number which was being used earlier. Some UDCs have issues supporting an interrupt IN endpoint having a max packet size less than a particular value (say 32). It is easier in that case to simply change the MACRO value instead of changing the max packet size value at a number of locations. Signed-off-by: Bhupesh Sharma <bhupesh.sharma@st.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
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@ -59,6 +59,8 @@ static struct usb_gadget_strings *uvc_function_strings[] = {
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#define UVC_INTF_VIDEO_CONTROL 0
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#define UVC_INTF_VIDEO_STREAMING 1
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#define STATUS_BYTECOUNT 16 /* 16 bytes status */
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static struct usb_interface_assoc_descriptor uvc_iad __initdata = {
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.bLength = sizeof(uvc_iad),
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.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
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@ -87,7 +89,7 @@ static struct usb_endpoint_descriptor uvc_control_ep __initdata = {
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_INT,
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.wMaxPacketSize = cpu_to_le16(16),
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.wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
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.bInterval = 8,
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};
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@ -95,7 +97,7 @@ static struct uvc_control_endpoint_descriptor uvc_control_cs_ep __initdata = {
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.bLength = UVC_DT_CONTROL_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_CS_ENDPOINT,
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.bDescriptorSubType = UVC_EP_INTERRUPT,
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.wMaxTransferSize = cpu_to_le16(16),
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.wMaxTransferSize = cpu_to_le16(STATUS_BYTECOUNT),
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};
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static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = {
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