OpenWrt – Rev 1
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From a740e59bf8099d1f5b5b29be3e9993fbd51e729a Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Fri, 6 Jul 2018 17:43:03 +0100
Subject: [PATCH 388/454] Revert "bcm2835-camera: Fix timestamp calculation
problem (#2214)"
This reverts commit 90ac037dbeecbb514b677e43b53bc5b1a452ea22.
This has been fixed in an alternate format upstream, so adopt that.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
.../bcm2835-camera/bcm2835-camera.c | 41 ++++++++++++++-----
.../bcm2835-camera/bcm2835-camera.h | 2 +-
2 files changed, 32 insertions(+), 11 deletions(-)
--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
@@ -374,17 +374,37 @@ static void buffer_cb(struct vchiq_mmal_
buf->vb.vb2_buf.timestamp);
} else if(pts != 0) {
+ struct timeval timestamp;
s64 runtime_us = pts -
dev->capture.vc_start_timestamp;
- buf->vb.vb2_buf.timestamp = (runtime_us * NSEC_PER_USEC) +
- dev->capture.kernel_start_timestamp;
+ u32 div = 0;
+ u32 rem = 0;
+
+ div =
+ div_u64_rem(runtime_us, USEC_PER_SEC, &rem);
+ timestamp.tv_sec =
+ dev->capture.kernel_start_ts.tv_sec + div;
+ timestamp.tv_usec =
+ dev->capture.kernel_start_ts.tv_usec + rem;
+
+ if (timestamp.tv_usec >=
+ USEC_PER_SEC) {
+ timestamp.tv_sec++;
+ timestamp.tv_usec -=
+ USEC_PER_SEC;
+ }
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
- "Buffer time set as converted timestamp - %llu "
- "= (pts [%lld usec] - vc start time [%llu usec]) "
- "+ kernel start time [%llu nsec]\n",
- buf->vb.vb2_buf.timestamp,
- pts, dev->capture.vc_start_timestamp,
- dev->capture.kernel_start_timestamp);
+ "Convert start time %d.%06d and %llu "
+ "with offset %llu to %d.%06d\n",
+ (int)dev->capture.kernel_start_ts.
+ tv_sec,
+ (int)dev->capture.kernel_start_ts.
+ tv_usec,
+ dev->capture.vc_start_timestamp, pts,
+ (int)timestamp.tv_sec,
+ (int)timestamp.tv_usec);
+ buf->vb.vb2_buf.timestamp = timestamp.tv_sec * 1000000000ULL +
+ timestamp.tv_usec * 1000ULL;
} else {
if (dev->capture.last_timestamp) {
buf->vb.vb2_buf.timestamp = dev->capture.last_timestamp;
@@ -394,7 +414,8 @@ static void buffer_cb(struct vchiq_mmal_
}
else {
buf->vb.vb2_buf.timestamp =
- dev->capture.kernel_start_timestamp;
+ dev->capture.kernel_start_ts.tv_sec * 1000000000ULL +
+ dev->capture.kernel_start_ts.tv_usec * 1000ULL;
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Buffer time set as start timestamp - %lld",
buf->vb.vb2_buf.timestamp);
@@ -575,7 +596,7 @@ static int start_streaming(struct vb2_qu
dev->capture.last_timestamp = 0;
- dev->capture.kernel_start_timestamp = ktime_get_ns();
+ v4l2_get_timestamp(&dev->capture.kernel_start_ts);
/* enable the camera port */
dev->capture.port->cb_ctx = dev;
--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.h
+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.h
@@ -92,7 +92,7 @@ struct bm2835_mmal_dev {
/* VC start timestamp for streaming */
s64 vc_start_timestamp;
/* Kernel start timestamp for streaming */
- u64 kernel_start_timestamp;
+ struct timeval kernel_start_ts;
/* Timestamp of last frame */
u64 last_timestamp;