Thread (7 messages) flat view 7 messages, 3 authors, 2021-03-15
STALE1979d

[PATCH 2/2] usb: webcam: Invalid size of Processing Unit Descriptor

From: Pawel Laszczak <pawell@cadence.com>
Date: 2021-03-08 10:29:27
Also in: linux-api, lkml
Subsystem: the rest, usb subsystem · Maintainers: Linus Torvalds, Greg Kroah-Hartman

From: Pawel Laszczak <pawell@cadence.com>

According with USB Device Class Definition for Video Device the
Processing Unit Descriptor bLength should be 12 (10 + bmControlSize),
but it has 11.

Invalid length caused that Processing Unit Descriptor Test Video form
CV tool failed. To fix this issue patch adds bmVideoStandards into
uvc_processing_unit_descriptor structure.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
---
 include/uapi/linux/usb/video.h | 1 +
 1 file changed, 1 insertion(+)
diff --git a/include/uapi/linux/usb/video.h b/include/uapi/linux/usb/video.h
index d854cb19c42c..2a54e8fdd341 100644
--- a/include/uapi/linux/usb/video.h
+++ b/include/uapi/linux/usb/video.h
@@ -302,6 +302,7 @@ struct uvc_processing_unit_descriptor {
 	__u8   bControlSize;
 	__u8   bmControls[2];
 	__u8   iProcessing;
+	__u8   bmVideoStandards;
 } __attribute__((__packed__));
 
 #define UVC_DT_PROCESSING_UNIT_SIZE(n)			(9+(n))
-- 
2.25.1
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