diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0404-staging-bcm2835_camera-Ensure-all-buffers-are-return.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0404-staging-bcm2835_camera-Ensure-all-buffers-are-return.patch | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0404-staging-bcm2835_camera-Ensure-all-buffers-are-return.patch b/target/linux/brcm2708/patches-4.14/950-0404-staging-bcm2835_camera-Ensure-all-buffers-are-return.patch new file mode 100644 index 0000000000..b2d7b8608a --- /dev/null +++ b/target/linux/brcm2708/patches-4.14/950-0404-staging-bcm2835_camera-Ensure-all-buffers-are-return.patch @@ -0,0 +1,82 @@ +From 13e015450812772f21c874dd310abe3379b87bb5 Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.org> +Date: Thu, 28 Jun 2018 15:57:25 +0100 +Subject: [PATCH 404/454] staging: bcm2835_camera: Ensure all buffers are + returned on disable + +With the recent change to match MMAL and V4L2 buffers there +is a need to wait for all MMAL buffers to be returned during +stop_streaming. + +Fixes: 9384167 "staging: bcm2835-camera: Remove V4L2/MMAL buffer remapping" +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> +--- + .../bcm2835-camera/bcm2835-camera.c | 16 ++++++++++++++++ + .../vc04_services/bcm2835-camera/mmal-vchiq.c | 4 ++++ + .../vc04_services/bcm2835-camera/mmal-vchiq.h | 3 +++ + 3 files changed, 23 insertions(+) + +--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c ++++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c +@@ -615,6 +615,7 @@ static void stop_streaming(struct vb2_qu + int ret; + unsigned long timeout; + struct bm2835_mmal_dev *dev = vb2_get_drv_priv(vq); ++ struct vchiq_mmal_port *port = dev->capture.port; + + v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "%s: dev:%p\n", + __func__, dev); +@@ -658,6 +659,21 @@ static void stop_streaming(struct vb2_qu + ret); + } + ++ /* wait for all buffers to be returned */ ++ while (atomic_read(&port->buffers_with_vpu)) { ++ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, ++ "%s: Waiting for buffers to be returned - %d outstanding\n", ++ __func__, atomic_read(&port->buffers_with_vpu)); ++ ret = wait_for_completion_timeout(&dev->capture.frame_cmplt, ++ HZ); ++ if (ret <= 0) { ++ v4l2_err(&dev->v4l2_dev, "%s: Timeout waiting for buffers to be returned - %d outstanding\n", ++ __func__, ++ atomic_read(&port->buffers_with_vpu)); ++ break; ++ } ++ } ++ + if (disable_camera(dev) < 0) + v4l2_err(&dev->v4l2_dev, "Failed to disable camera\n"); + } +--- a/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c ++++ b/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c +@@ -318,6 +318,8 @@ static void buffer_work_cb(struct work_s + struct mmal_msg_context *msg_context = + container_of(work, struct mmal_msg_context, u.bulk.work); + ++ atomic_dec(&msg_context->u.bulk.port->buffers_with_vpu); ++ + msg_context->u.bulk.port->buffer_cb(msg_context->u.bulk.instance, + msg_context->u.bulk.port, + msg_context->u.bulk.status, +@@ -461,6 +463,8 @@ buffer_from_host(struct vchiq_mmal_insta + INIT_WORK(&msg_context->u.bulk.buffer_to_host_work, + buffer_to_host_work_cb); + ++ atomic_inc(&port->buffers_with_vpu); ++ + /* prep the buffer from host message */ + memset(&m, 0xbc, sizeof(m)); /* just to make debug clearer */ + +--- a/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.h ++++ b/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.h +@@ -75,6 +75,9 @@ struct vchiq_mmal_port { + struct list_head buffers; + /* lock to serialise adding and removing buffers from list */ + spinlock_t slock; ++ ++ /* Count of buffers the VPU has yet to return */ ++ atomic_t buffers_with_vpu; + /* callback on buffer completion */ + vchiq_mmal_buffer_cb buffer_cb; + /* callback context */ |