This is a note to let you know that I've just added the patch titled
staging: bcm2835-camera: Restore return behavior of
to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-testing branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will be merged to the staging-next branch sometime soon,
after it passes testing, and the merge window is open.
If you have any questions about this process, please let me know.
>From f816db1dc17b99b059325f41ed5a78f85d15368c Mon Sep 17 00:00:00 2001
From: Stefan Wahren <wahrenst@xxxxxxx>
Date: Wed, 26 Jun 2019 17:48:11 +0200
Subject: staging: bcm2835-camera: Restore return behavior of
ctrl_set_bitrate()
The commit 52c4dfcead49 ("Staging: vc04_services: Cleanup in
ctrl_set_bitrate()") changed the return behavior of ctrl_set_bitrate().
We cannot do this because of a bug in the firmware, which breaks probing
of bcm2835-camera:
bcm2835-v4l2: mmal_init: failed to set all camera controls: -3
Cleanup: Destroy video encoder
Cleanup: Destroy image encoder
Cleanup: Destroy video render
Cleanup: Destroy camera
bcm2835-v4l2: bcm2835_mmal_probe: mmal init failed: -3
bcm2835-camera: probe of bcm2835-camera failed with error -3
So restore the old behavior, add an explaining comment and a debug message
to verify that the bug has been fixed in firmware.
Fixes: 52c4dfcead49 ("Staging: vc04_services: Cleanup in ctrl_set_bitrate()")
Signed-off-by: Stefan Wahren <wahrenst@xxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Acked-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
.../vc04_services/bcm2835-camera/controls.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/vc04_services/bcm2835-camera/controls.c b/drivers/staging/vc04_services/bcm2835-camera/controls.c
index d60e378bdfce..c251164655ba 100644
--- a/drivers/staging/vc04_services/bcm2835-camera/controls.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/controls.c
@@ -604,15 +604,28 @@ static int ctrl_set_bitrate(struct bm2835_mmal_dev *dev,
struct v4l2_ctrl *ctrl,
const struct bm2835_mmal_v4l2_ctrl *mmal_ctrl)
{
+ int ret;
struct vchiq_mmal_port *encoder_out;
dev->capture.encode_bitrate = ctrl->val;
encoder_out = &dev->component[MMAL_COMPONENT_VIDEO_ENCODE]->output[0];
- return vchiq_mmal_port_parameter_set(dev->instance, encoder_out,
- mmal_ctrl->mmal_id, &ctrl->val,
- sizeof(ctrl->val));
+ ret = vchiq_mmal_port_parameter_set(dev->instance, encoder_out,
+ mmal_ctrl->mmal_id, &ctrl->val,
+ sizeof(ctrl->val));
+
+ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
+ "%s: After: mmal_ctrl:%p ctrl id:0x%x ctrl val:%d ret %d(%d)\n",
+ __func__, mmal_ctrl, ctrl->id, ctrl->val, ret,
+ (ret == 0 ? 0 : -EINVAL));
+
+ /*
+ * Older firmware versions (pre July 2019) have a bug in handling
+ * MMAL_PARAMETER_VIDEO_BIT_RATE that result in the call
+ * returning -MMAL_MSG_STATUS_EINVAL. So ignore errors from this call.
+ */
+ return 0;
}
static int ctrl_set_bitrate_mode(struct bm2835_mmal_dev *dev,
--
2.22.0
