From e1b78a335996031fea81d3dcbea9724ed3dd4a80 Mon Sep 17 00:00:00 2001 From: Philipp Zabel Date: Wed, 6 Aug 2014 17:50:49 -0300 Subject: [PATCH] [media] uvcvideo: Add quirk to force the Oculus DK2 IR tracker to grayscale This patch adds a quirk to force Y8 pixel format even if the camera reports half-width YUYV. Signed-off-by: Philipp Zabel Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/uvc/uvc_driver.c | 27 ++++++++++++++++++++++++++- drivers/media/usb/uvc/uvcvideo.h | 1 + 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index 7c8322d..b7e111d 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -331,6 +331,7 @@ static int uvc_parse_format(struct uvc_device *dev, struct uvc_format_desc *fmtdesc; struct uvc_frame *frame; const unsigned char *start = buffer; + unsigned int width_multiplier = 1; unsigned int interval; unsigned int i, n; __u8 ftype; @@ -366,6 +367,20 @@ static int uvc_parse_format(struct uvc_device *dev, } format->bpp = buffer[21]; + + /* Some devices report a format that doesn't match what they + * really send. + */ + if (dev->quirks & UVC_QUIRK_FORCE_Y8) { + if (format->fcc == V4L2_PIX_FMT_YUYV) { + strlcpy(format->name, "Greyscale 8-bit (Y8 )", + sizeof(format->name)); + format->fcc = V4L2_PIX_FMT_GREY; + format->bpp = 8; + width_multiplier = 2; + } + } + if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) { ftype = UVC_VS_FRAME_UNCOMPRESSED; } else { @@ -474,7 +489,8 @@ static int uvc_parse_format(struct uvc_device *dev, frame->bFrameIndex = buffer[3]; frame->bmCapabilities = buffer[4]; - frame->wWidth = get_unaligned_le16(&buffer[5]); + frame->wWidth = get_unaligned_le16(&buffer[5]) + * width_multiplier; frame->wHeight = get_unaligned_le16(&buffer[7]); frame->dwMinBitRate = get_unaligned_le32(&buffer[9]); frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]); @@ -2504,6 +2520,15 @@ static struct usb_device_id uvc_ids[] = { .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX | UVC_QUIRK_IGNORE_SELECTOR_UNIT }, + /* Oculus VR Positional Tracker DK2 */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x2833, + .idProduct = 0x0201, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_FORCE_Y8 }, /* Generic USB Video Class */ { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) }, {} diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 864ada7..2600c96 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -148,6 +148,7 @@ #define UVC_QUIRK_PROBE_DEF 0x00000100 #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400 +#define UVC_QUIRK_FORCE_Y8 0x00000800 /* Format flags */ #define UVC_FMT_FLAG_COMPRESSED 0x00000001 -- 2.7.4