diff options
| author | Michael Olbrich <m.olbrich@pengutronix.de> | 2021-10-22 11:32:23 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-25 09:20:08 +0200 |
| commit | fd03af27c3dfbff4f6b3905c5fceedebeca70e5e (patch) | |
| tree | ef8b77e6849bdf547263dfc793b74feafb66f359 /drivers/usb | |
| parent | f262ce66d40cc6858d1fcb11e7b7f960448a4f38 (diff) | |
usb: gadget: uvc: implement dwPresentationTime and scrSourceClock
This patch adds the fields UVC_STREAM_PTS and UVC_STREAM_SCR to the uvc
header, in case this data is available. It also enables the copy of the
timestamp to the vb2_v4l2_buffer by setting V4L2_BUF_FLAG_TIMESTAMP_COPY
in the queue.timestamp_flags.
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20211022093223.26493-2-m.grzeschik@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/function/uvc.h | 2 | ||||
| -rw-r--r-- | drivers/usb/gadget/function/uvc_queue.c | 2 | ||||
| -rw-r--r-- | drivers/usb/gadget/function/uvc_video.c | 35 |
3 files changed, 34 insertions, 5 deletions
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h index b05de36e2c60..c3607a32b986 100644 --- a/drivers/usb/gadget/function/uvc.h +++ b/drivers/usb/gadget/function/uvc.h @@ -68,7 +68,7 @@ extern unsigned int uvc_gadget_trace_param; #define UVC_MAX_REQUEST_SIZE 64 #define UVC_MAX_EVENTS 4 -#define UVCG_REQUEST_HEADER_LEN 2 +#define UVCG_REQUEST_HEADER_LEN 12 /* ------------------------------------------------------------------------ * Structures diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c index 7d00ad7c154c..d852ac9e47e7 100644 --- a/drivers/usb/gadget/function/uvc_queue.c +++ b/drivers/usb/gadget/function/uvc_queue.c @@ -142,7 +142,7 @@ int uvcg_queue_init(struct uvc_video_queue *queue, struct device *dev, enum v4l2 queue->queue.mem_ops = &vb2_vmalloc_memops; } - queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC + queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY | V4L2_BUF_FLAG_TSTAMP_SRC_EOF; queue->queue.dev = dev; diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index 2a9ab54bb3dc..7f59a0c47402 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -12,6 +12,7 @@ #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> #include <linux/usb/video.h> +#include <asm/unaligned.h> #include <media/v4l2-dev.h> @@ -27,13 +28,41 @@ static int uvc_video_encode_header(struct uvc_video *video, struct uvc_buffer *buf, u8 *data, int len) { - data[0] = UVCG_REQUEST_HEADER_LEN; + struct uvc_device *uvc = container_of(video, struct uvc_device, video); + struct usb_composite_dev *cdev = uvc->func.config->cdev; + struct timespec64 ts = ns_to_timespec64(buf->buf.vb2_buf.timestamp); + int pos = 2; + data[1] = UVC_STREAM_EOH | video->fid; - if (buf->bytesused - video->queue.buf_used <= len - UVCG_REQUEST_HEADER_LEN) + if (video->queue.buf_used == 0 && ts.tv_sec) { + /* dwClockFrequency is 48 MHz */ + u32 pts = ((u64)ts.tv_sec * USEC_PER_SEC + ts.tv_nsec / NSEC_PER_USEC) * 48; + + data[1] |= UVC_STREAM_PTS; + put_unaligned_le32(pts, &data[pos]); + pos += 4; + } + + if (cdev->gadget->ops->get_frame) { + u32 sof, stc; + + sof = usb_gadget_frame_number(cdev->gadget); + ktime_get_ts64(&ts); + stc = ((u64)ts.tv_sec * USEC_PER_SEC + ts.tv_nsec / NSEC_PER_USEC) * 48; + + data[1] |= UVC_STREAM_SCR; + put_unaligned_le32(stc, &data[pos]); + put_unaligned_le16(sof, &data[pos+4]); + pos += 6; + } + + data[0] = pos; + + if (buf->bytesused - video->queue.buf_used <= len - pos) data[1] |= UVC_STREAM_EOF; - return UVCG_REQUEST_HEADER_LEN; + return pos; } static int |