diff options
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/uvc/uvc_video.c | 37 | ||||
| -rw-r--r-- | drivers/media/usb/uvc/uvcvideo.h | 2 |
2 files changed, 13 insertions, 26 deletions
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index d468332abe0d..13f459ea239c 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -369,12 +369,12 @@ static int uvc_commit_video(struct uvc_streaming *stream, * Clocks and timestamps */ -static inline void uvc_video_get_ts(struct timespec *ts) +static inline ktime_t uvc_video_get_time(void) { if (uvc_clock_param == CLOCK_MONOTONIC) - ktime_get_ts(ts); + return ktime_get(); else - ktime_get_real_ts(ts); + return ktime_get_real(); } static void @@ -386,7 +386,7 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf, bool has_pts = false; bool has_scr = false; unsigned long flags; - struct timespec ts; + ktime_t time; u16 host_sof; u16 dev_sof; @@ -436,7 +436,7 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf, stream->clock.last_sof = dev_sof; host_sof = usb_get_current_frame_number(stream->dev->udev); - uvc_video_get_ts(&ts); + time = uvc_video_get_time(); /* The UVC specification allows device implementations that can't obtain * the USB frame number to keep their own frame counters as long as they @@ -473,7 +473,7 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf, sample->dev_stc = get_unaligned_le32(&data[header_size - 6]); sample->dev_sof = dev_sof; sample->host_sof = host_sof; - sample->host_ts = ts; + sample->host_time = time; /* Update the sliding window head and count. */ stream->clock.head = (stream->clock.head + 1) % stream->clock.size; @@ -613,14 +613,12 @@ void uvc_video_clock_update(struct uvc_streaming *stream, struct uvc_clock_sample *first; struct uvc_clock_sample *last; unsigned long flags; - struct timespec ts; + u64 timestamp; u32 delta_stc; u32 y1, y2; u32 x1, x2; u32 mean; u32 sof; - u32 div; - u32 rem; u64 y; if (!uvc_hw_timestamps_param) @@ -667,9 +665,8 @@ void uvc_video_clock_update(struct uvc_streaming *stream, if (x1 == x2) goto done; - ts = timespec_sub(last->host_ts, first->host_ts); y1 = NSEC_PER_SEC; - y2 = (ts.tv_sec + 1) * NSEC_PER_SEC + ts.tv_nsec; + y2 = (u32)ktime_to_ns(ktime_sub(last->host_time, first->host_time)) + y1; /* Interpolated and host SOF timestamps can wrap around at slightly * different times. Handle this by adding or removing 2048 to or from @@ -686,24 +683,18 @@ void uvc_video_clock_update(struct uvc_streaming *stream, - (u64)y2 * (u64)x1; y = div_u64(y, x2 - x1); - div = div_u64_rem(y, NSEC_PER_SEC, &rem); - ts.tv_sec = first->host_ts.tv_sec - 1 + div; - ts.tv_nsec = first->host_ts.tv_nsec + rem; - if (ts.tv_nsec >= NSEC_PER_SEC) { - ts.tv_sec++; - ts.tv_nsec -= NSEC_PER_SEC; - } + timestamp = ktime_to_ns(first->host_time) + y - y1; uvc_trace(UVC_TRACE_CLOCK, "%s: SOF %u.%06llu y %llu ts %llu " "buf ts %llu (x1 %u/%u/%u x2 %u/%u/%u y1 %u y2 %u)\n", stream->dev->name, sof >> 16, div_u64(((u64)sof & 0xffff) * 1000000LLU, 65536), - y, timespec_to_ns(&ts), vbuf->vb2_buf.timestamp, + y, timestamp, vbuf->vb2_buf.timestamp, x1, first->host_sof, first->dev_sof, x2, last->host_sof, last->dev_sof, y1, y2); /* Update the V4L2 buffer. */ - vbuf->vb2_buf.timestamp = timespec_to_ns(&ts); + vbuf->vb2_buf.timestamp = timestamp; done: spin_unlock_irqrestore(&clock->lock, flags); @@ -1007,8 +998,6 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, * when the EOF bit is set to force synchronisation on the next packet. */ if (buf->state != UVC_BUF_STATE_ACTIVE) { - struct timespec ts; - if (fid == stream->last_fid) { uvc_trace(UVC_TRACE_FRAME, "Dropping payload (out of " "sync).\n"); @@ -1018,11 +1007,9 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, return -ENODATA; } - uvc_video_get_ts(&ts); - buf->buf.field = V4L2_FIELD_NONE; buf->buf.sequence = stream->sequence; - buf->buf.vb2_buf.timestamp = timespec_to_ns(&ts); + buf->buf.vb2_buf.timestamp = uvc_video_get_time(); /* TODO: Handle PTS and SCR. */ buf->state = UVC_BUF_STATE_ACTIVE; diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 94392a3256e8..dd9c79a92622 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -541,8 +541,8 @@ struct uvc_streaming { struct uvc_clock_sample { u32 dev_stc; u16 dev_sof; - struct timespec host_ts; u16 host_sof; + ktime_t host_time; } *samples; unsigned int head; |