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83 lines
3.1 KiB
Diff
83 lines
3.1 KiB
Diff
6 years ago
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From 13e015450812772f21c874dd310abe3379b87bb5 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Thu, 28 Jun 2018 15:57:25 +0100
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Subject: [PATCH 404/454] staging: bcm2835_camera: Ensure all buffers are
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returned on disable
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With the recent change to match MMAL and V4L2 buffers there
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is a need to wait for all MMAL buffers to be returned during
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stop_streaming.
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Fixes: 9384167 "staging: bcm2835-camera: Remove V4L2/MMAL buffer remapping"
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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.../bcm2835-camera/bcm2835-camera.c | 16 ++++++++++++++++
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.../vc04_services/bcm2835-camera/mmal-vchiq.c | 4 ++++
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.../vc04_services/bcm2835-camera/mmal-vchiq.h | 3 +++
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3 files changed, 23 insertions(+)
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--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
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+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
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@@ -615,6 +615,7 @@ static void stop_streaming(struct vb2_qu
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int ret;
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unsigned long timeout;
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struct bm2835_mmal_dev *dev = vb2_get_drv_priv(vq);
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+ struct vchiq_mmal_port *port = dev->capture.port;
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v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "%s: dev:%p\n",
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__func__, dev);
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@@ -658,6 +659,21 @@ static void stop_streaming(struct vb2_qu
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ret);
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}
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+ /* wait for all buffers to be returned */
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+ while (atomic_read(&port->buffers_with_vpu)) {
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+ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
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+ "%s: Waiting for buffers to be returned - %d outstanding\n",
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+ __func__, atomic_read(&port->buffers_with_vpu));
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+ ret = wait_for_completion_timeout(&dev->capture.frame_cmplt,
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+ HZ);
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+ if (ret <= 0) {
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+ v4l2_err(&dev->v4l2_dev, "%s: Timeout waiting for buffers to be returned - %d outstanding\n",
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+ __func__,
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+ atomic_read(&port->buffers_with_vpu));
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+ break;
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+ }
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+ }
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+
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if (disable_camera(dev) < 0)
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v4l2_err(&dev->v4l2_dev, "Failed to disable camera\n");
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}
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--- a/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c
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+++ b/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c
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@@ -318,6 +318,8 @@ static void buffer_work_cb(struct work_s
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struct mmal_msg_context *msg_context =
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container_of(work, struct mmal_msg_context, u.bulk.work);
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+ atomic_dec(&msg_context->u.bulk.port->buffers_with_vpu);
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+
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msg_context->u.bulk.port->buffer_cb(msg_context->u.bulk.instance,
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msg_context->u.bulk.port,
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msg_context->u.bulk.status,
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@@ -461,6 +463,8 @@ buffer_from_host(struct vchiq_mmal_insta
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INIT_WORK(&msg_context->u.bulk.buffer_to_host_work,
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buffer_to_host_work_cb);
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+ atomic_inc(&port->buffers_with_vpu);
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+
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/* prep the buffer from host message */
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memset(&m, 0xbc, sizeof(m)); /* just to make debug clearer */
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--- a/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.h
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+++ b/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.h
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@@ -75,6 +75,9 @@ struct vchiq_mmal_port {
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struct list_head buffers;
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/* lock to serialise adding and removing buffers from list */
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spinlock_t slock;
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+
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+ /* Count of buffers the VPU has yet to return */
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+ atomic_t buffers_with_vpu;
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/* callback on buffer completion */
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vchiq_mmal_buffer_cb buffer_cb;
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/* callback context */
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