The Cypress EZUSB FX3 UVC example can be configured to report pixel
format "e436eb7e-524f-11ce-9f53-0020af0ba770". This is its GUID for
BGRA/X 8:8:8:8.
The UVC 1.5 spec [1] only defines GUIDs for YUY2, NV12, M420 and I420.
This seems to be an extension documented in the Microsoft Windows Media
Format SDK[2]. This Media Format SDK defines this GUID as corresponding
to `MEDIASUBTYPE_RGB32`.
Note that in my case, the FX3 UVC can output either channel order,
BGR or RGB or any other mix for that matter. Since Linux commit
1b8dc32286a1a ("[media] uvcvideo: Add GUID for BGR 8:8:8")
defined a GUID for `MEDIASUBTYPE_RGB24` channel order as BGR, keep
this change consistent and define `MEDIASUBTYPE_RGB32` as BGR as well.
[1]: https://www.usb.org/document-library/video-class-v15-document-set
[2]: https://learn.microsoft.com/en-us/windows/win32/wmformat/media-type-identifiers
Signed-off-by: Marek Vasut <marex@xxxxxxx>
---
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Cc: William Manley <will@xxxxxxxxxxxxxxxxx>
---
include/media/v4l2-uvc.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/media/v4l2-uvc.h b/include/media/v4l2-uvc.h
index f83e31661333b..c10e9086338be 100644
--- a/include/media/v4l2-uvc.h
+++ b/include/media/v4l2-uvc.h
@@ -99,6 +99,9 @@
#define UVC_GUID_FORMAT_BGR3 \
{ 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
+#define UVC_GUID_FORMAT_BGR4 \
+ { 0x7e, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
+ 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
#define UVC_GUID_FORMAT_M420 \
{ 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
@@ -266,6 +269,11 @@ static struct uvc_format_desc uvc_fmts[] = {
.guid = UVC_GUID_FORMAT_BGR3,
.fcc = V4L2_PIX_FMT_BGR24,
},
+ {
+ .name = "BGRA/X 8:8:8:8 (BGR4)",
+ .guid = UVC_GUID_FORMAT_BGR4,
+ .fcc = V4L2_PIX_FMT_BGR32,
+ },
{
.name = "H.264",
.guid = UVC_GUID_FORMAT_H264,
--
2.39.0
