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staging: bcm2835-camera: Handle empty EOS buffers whilst streaming

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The change to mapping V4L2 to MMAL buffers 1:1 didn't handle
the condition we get with raw pixel buffers (eg YUV and RGB)
direct from the camera's stills port. That sends the pixel buffer
and then an empty buffer with the EOS flag set. The EOS buffer
wasn't handled and returned an error up the stack.

Handle the condition correctly by returning it to the component
if streaming, or returning with an error if stopping streaming.

Fixes: 9384167070 ("staging: bcm2835-camera: Remove V4L2/MMAL buffer remapping")
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dave Stevenson
2019-06-29 14:48:23 +02:00
committed by Greg Kroah-Hartman
parent bb8e97006d
commit a26be06d6d
2 changed files with 15 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
View File

@@ -339,16 +339,13 @@ static void buffer_cb(struct vchiq_mmal_instance *instance,
if (length == 0) {
/* stream ended */
if (buf) {
/* this should only ever happen if the port is
* disabled and there are buffers still queued
if (dev->capture.frame_count) {
/* empty buffer whilst capturing - expected to be an
* EOS, so grab another frame
*/
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
pr_debug("Empty buffer");
} else if (dev->capture.frame_count) {
/* grab another frame */
if (is_capturing(dev)) {
pr_debug("Grab another frame");
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Grab another frame");
vchiq_mmal_port_parameter_set(
instance,
dev->capture.camera_port,
@@ -356,8 +353,14 @@ static void buffer_cb(struct vchiq_mmal_instance *instance,
&dev->capture.frame_count,
sizeof(dev->capture.frame_count));
}
if (vchiq_mmal_submit_buffer(instance, port, buf))
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Failed to return EOS buffer");
} else {
/* signal frame completion */
/* stopping streaming.
* return buffer, and signal frame completion
*/
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
complete(&dev->capture.frame_cmplt);
}
return;

5
drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c
View File

@@ -332,8 +332,6 @@ static int bulk_receive(struct vchiq_mmal_instance *instance,
/* store length */
msg_context->u.bulk.buffer_used = rd_len;
msg_context->u.bulk.mmal_flags =
msg->u.buffer_from_host.buffer_header.flags;
msg_context->u.bulk.dts = msg->u.buffer_from_host.buffer_header.dts;
msg_context->u.bulk.pts = msg->u.buffer_from_host.buffer_header.pts;
@@ -461,6 +459,9 @@ static void buffer_to_host_cb(struct vchiq_mmal_instance *instance,
return;
}
msg_context->u.bulk.mmal_flags =
msg->u.buffer_from_host.buffer_header.flags;
if (msg->h.status != MMAL_MSG_STATUS_SUCCESS) {
/* message reception had an error */
pr_warn("error %d in reply\n", msg->h.status);