linux-kernel - Re: uvcvideo: Unknown video format,00000032-0002-0010-8000-00aa00389b71

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Date:   Wed, 21 Mar 2018 11:25:42 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Paul Menzel <pmenzel+linux-media@...gen.mpg.de>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        it+linux-media@...gen.mpg.de,
        Mario Limonciello <mario.limonciello@...l.com>
Subject: Re: uvcvideo: Unknown video format,00000032-0002-0010-8000-00aa00389b71

Hi Paul,

On Tuesday, 20 March 2018 18:46:24 EET Paul Menzel wrote:
> On 03/20/18 14:30, Laurent Pinchart wrote:
> > On Tuesday, 20 March 2018 14:20:14 EET Paul Menzel wrote:
> >> On the Dell XPS 13 9370, Linux 4.16-rc6 outputs the messages below.
> >> 
> >> ```
> 
> […]
> 
> >> [    2.340736] input: Integrated_Webcam_HD: Integrate as
> >> /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input9
> >> [    2.341447] uvcvideo: Unknown video format
> >> 00000032-0002-0010-8000-00aa00389b71 >> [    2.341450] uvcvideo: Found
> >> UVC 1.00 device Integrated_Webcam_HD (0bda:58f4)
> 
> […]
> 
> >> ```
> >> 
> >> Please tell me, what I can do to improve the situation.
> > 
> > Some vendors routinely implement new formats without bothering to send a
> > patch for the uvcvideo driver. It would be easy to do so, but it requires
> > knowing which format is meant by the GUID. Most format GUIDs are of the
> > form 32595559-0000-0010-8000-00aa00389b71 that starts with a 4CC, but
> > that's not the case here.
> 
> I am adding Mario to the receiver list, though he is currently on vacation.
> 
> > Could you send me the output of
> > 
> > lsusb -v -d 0bda:58f4
> > 
> > running as root if possible ?
> 
> Sure, please find it attached.

Thank you.

Could you please try the following patch ?

commit 7b3dea984b380f5b4b5c1956a9c6c23966af2149
Author: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Date:   Wed Mar 21 11:16:40 2018 +0200

    media: uvcvideo: Add KSMedia 8-bit IR format support
    
    Add support for the 8-bit IR format GUID defined in the Microsoft Kernel
    Streaming Media API.
    
    Reported-by: Paul Menzel <pmenzel+linux-media@...gen.mpg.de>
    Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 2469b49b2b30..3691d87ef869 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -99,6 +99,11 @@ static struct uvc_format_desc uvc_fmts[] = {
 		.guid		= UVC_GUID_FORMAT_D3DFMT_L8,
 		.fcc		= V4L2_PIX_FMT_GREY,
 	},
+	{
+		.name		= "IR 8-bit (L8_IR)",
+		.guid		= UVC_GUID_FORMAT_KSMEDIA_L8_IR,
+		.fcc		= V4L2_PIX_FMT_GREY,
+	},
 	{
 		.name		= "Greyscale 10-bit (Y10 )",
 		.guid		= UVC_GUID_FORMAT_Y10,
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index be5cf179228b..6b955e0dd956 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -157,6 +157,9 @@
 #define UVC_GUID_FORMAT_D3DFMT_L8 \
 	{0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, \
 	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_KSMEDIA_L8_IR \
+	{0x32, 0x00, 0x00, 0x00, 0x02, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 
 
 /* ------------------------------------------------------------------------

-- 
Regards,

Laurent Pinchart