linux-kernel - [PATCH] uvc: Add D3DFMT

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Message-Id: <20171103175746.30456-1-nicolas.dufresne@collabora.com>
Date:   Fri,  3 Nov 2017 13:57:46 -0400
From:   Nicolas Dufresne <nicolas.dufresne@...labora.com>
To:     laurent.pinchart@...asonboard.com
Cc:     mchehab@...nel.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>
Subject: [PATCH] uvc: Add D3DFMT_L8 support

Microsoft HoloLense UVC sensor uses D3DFMT instead of FOURCC when
exposing formats. This add support for D3DFMT_L8 as exposed from
the Acer Windows Mixed Reality Headset.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
---
 drivers/media/usb/uvc/uvc_driver.c | 5 +++++
 drivers/media/usb/uvc/uvcvideo.h   | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 6d22b22cb35b..56f70851f88b 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -203,6 +203,11 @@ static struct uvc_format_desc uvc_fmts[] = {
 		.guid		= UVC_GUID_FORMAT_INZI,
 		.fcc		= V4L2_PIX_FMT_INZI,
 	},
+	{
+		.name		= "Greyscale 8-bit (D3DFMT_L8)",
+		.guid		= UVC_GUID_FORMAT_D3DFMT_L8,
+		.fcc		= V4L2_PIX_FMT_GREY,
+	},
 };
 
 /* ------------------------------------------------------------------------
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 34c7ee6cc9e5..fbc1f433ff05 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -153,6 +153,11 @@
 	{ 'I',  'N',  'V',  'I', 0xdb, 0x57, 0x49, 0x5e, \
 	 0x8e, 0x3f, 0xf4, 0x79, 0x53, 0x2b, 0x94, 0x6f}
 
+#define UVC_GUID_FORMAT_D3DFMT_L8 \
+	{0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+
+
 /* ------------------------------------------------------------------------
  * Driver specific constants.
  */
-- 
2.13.6