From 43ff05e20c6e2428fe2deb1dc0fed008743e66a3 Mon Sep 17 00:00:00 2001 From: Bhupesh Sharma Date: Fri, 1 Mar 2013 20:46:29 +0100 Subject: [PATCH] usb: gadget: uvc: Add fix for UVC compliance test suite's assertion 6.1.25 failure As per the UVC compliance test suite's assertion 6.1.25, the `iFunction` field of the Interface Association Descriptor (IAD) should the match the `iInterface` field of the standard Video Control (VC) Interface Descriptor for this Video Interface Collection (VIC). This mandatory case is captured in section 3.11 of the USB Video Class Compliance specification revision 1.1 This patch fixes this test assertion's failure and has been tested on Linux FC16, WinXP, WIN7 and WIN8 High speed and Super Speed hosts for successful enumeration. Signed-off-by: Bhupesh Sharma [Merged the association and control string descriptors] Signed-off-by: Laurent Pinchart Tested-by: Bhupesh Sharma Signed-off-by: Felipe Balbi --- drivers/usb/gadget/f_uvc.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/usb/gadget/f_uvc.c b/drivers/usb/gadget/f_uvc.c index 76ec10f..49939e4 100644 --- a/drivers/usb/gadget/f_uvc.c +++ b/drivers/usb/gadget/f_uvc.c @@ -51,13 +51,11 @@ MODULE_PARM_DESC(streaming_maxburst, "0 - 15 (ss only)"); /* string IDs are assigned dynamically */ -#define UVC_STRING_ASSOCIATION_IDX 0 -#define UVC_STRING_CONTROL_IDX 1 -#define UVC_STRING_STREAMING_IDX 2 +#define UVC_STRING_CONTROL_IDX 0 +#define UVC_STRING_STREAMING_IDX 1 static struct usb_string uvc_en_us_strings[] = { - [UVC_STRING_ASSOCIATION_IDX].s = "UVC Camera", - [UVC_STRING_CONTROL_IDX].s = "Video Control", + [UVC_STRING_CONTROL_IDX].s = "UVC Camera", [UVC_STRING_STREAMING_IDX].s = "Video Streaming", { } }; @@ -572,7 +570,7 @@ uvc_function_unbind(struct usb_configuration *c, struct usb_function *f) uvc->control_ep->driver_data = NULL; uvc->video.ep->driver_data = NULL; - uvc_en_us_strings[UVC_STRING_ASSOCIATION_IDX].id = 0; + uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id = 0; usb_ep_free_request(cdev->gadget->ep0, uvc->control_req); kfree(uvc->control_buf); @@ -796,12 +794,12 @@ uvc_bind_config(struct usb_configuration *c, * for the first UVC function. UVC functions beyond the first (if any) * will reuse the same IDs. */ - if (uvc_en_us_strings[UVC_STRING_ASSOCIATION_IDX].id == 0) { + if (uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id == 0) { ret = usb_string_ids_tab(c->cdev, uvc_en_us_strings); if (ret) goto error; uvc_iad.iFunction = - uvc_en_us_strings[UVC_STRING_ASSOCIATION_IDX].id; + uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id; uvc_control_intf.iInterface = uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id; ret = uvc_en_us_strings[UVC_STRING_STREAMING_IDX].id; -- 2.7.4