Hi Sakari,
thanks for helping.
My code sets up the ISP pipeline, configures the format on all the
subdevices pads and the actual video device. Works fine so far.
Then I passed user pointers (aquired with malloc) to the device
driver for the capture buffers. Before issuing VIDIOC_STREAMON, I
enqueue my buffers with VIDIOC_QBUF, which fails with errno = EIO. I
don't know, why this is happening or where to got from here.
One possibility could be that mapping the buffer to ISP MMU fails for
a reason or another. Do you set the length field in the buffer?
Yes, the length was set when using userptr.
And am I missing something else?
The formats on the pads at different ends of the links in the pipeline must
match. In most cases, they have to be exactly the same.
Have you used the media-ctl test program here?
<URL:http://git.ideasonboard.org/media-ctl.git>
media-ctl -p gives you (and us) lots of information that helps figuring out
what could go wrong here.
All pads do indeed have the same format.
I ran media-ctl, as you suggested. You can see the topology in the
attached textfile.
Kind regards,
Andreas
Opening media device /dev/media0
Enumerating entities
Found 16 entities
Enumerating pads and links
Media controller API version 0.0.0
Media device information
------------------------
driver omap3isp
model TI OMAP3 ISP
serial
bus info
hw revision 0x0
driver version 0.0.0
Device topology
- entity 1: OMAP3 ISP CCP2 (2 pads, 2 links)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev0
pad0: Sink
<- "OMAP3 ISP CCP2 input":0 []
pad1: Source
-> "OMAP3 ISP CCDC":0 []
- entity 2: OMAP3 ISP CCP2 input (1 pad, 1 link)
type Node subtype V4L
device node name /dev/video0
pad0: Source
-> "OMAP3 ISP CCP2":0 []
- entity 3: OMAP3 ISP CSI2a (2 pads, 2 links)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev1
pad0: Sink
pad1: Source
-> "OMAP3 ISP CSI2a output":0 []
-> "OMAP3 ISP CCDC":0 []
- entity 4: OMAP3 ISP CSI2a output (1 pad, 1 link)
type Node subtype V4L
device node name /dev/video1
pad0: Sink
<- "OMAP3 ISP CSI2a":1 []
- entity 5: OMAP3 ISP CCDC (3 pads, 9 links)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev2
pad0: Sink
<- "OMAP3 ISP CCP2":1 []
<- "OMAP3 ISP CSI2a":1 []
<- "tvp514x 2-005d":0 []
pad1: Source
-> "OMAP3 ISP CCDC output":0 []
-> "OMAP3 ISP resizer":0 []
pad2: Source
-> "OMAP3 ISP preview":0 []
-> "OMAP3 ISP AEWB":0 [ENABLED,IMMUTABLE]
-> "OMAP3 ISP AF":0 [ENABLED,IMMUTABLE]
-> "OMAP3 ISP histogram":0 [ENABLED,IMMUTABLE]
- entity 6: OMAP3 ISP CCDC output (1 pad, 1 link)
type Node subtype V4L
device node name /dev/video2
pad0: Sink
<- "OMAP3 ISP CCDC":1 []
- entity 7: OMAP3 ISP preview (2 pads, 4 links)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev3
pad0: Sink
<- "OMAP3 ISP CCDC":2 []
<- "OMAP3 ISP preview input":0 []
pad1: Source
-> "OMAP3 ISP preview output":0 []
-> "OMAP3 ISP resizer":0 []
- entity 8: OMAP3 ISP preview input (1 pad, 1 link)
type Node subtype V4L
device node name /dev/video3
pad0: Source
-> "OMAP3 ISP preview":0 []
- entity 9: OMAP3 ISP preview output (1 pad, 1 link)
type Node subtype V4L
device node name /dev/video4
pad0: Sink
<- "OMAP3 ISP preview":1 []
- entity 10: OMAP3 ISP resizer (2 pads, 4 links)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev4
pad0: Sink
<- "OMAP3 ISP CCDC":1 []
<- "OMAP3 ISP preview":1 []
<- "OMAP3 ISP resizer input":0 []
pad1: Source
-> "OMAP3 ISP resizer output":0 []
- entity 11: OMAP3 ISP resizer input (1 pad, 1 link)
type Node subtype V4L
device node name /dev/video5
pad0: Source
-> "OMAP3 ISP resizer":0 []
- entity 12: OMAP3 ISP resizer output (1 pad, 1 link)
type Node subtype V4L
device node name /dev/video6
pad0: Sink
<- "OMAP3 ISP resizer":1 []
- entity 13: OMAP3 ISP AEWB (1 pad, 1 link)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev5
pad0: Sink
<- "OMAP3 ISP CCDC":2 [ENABLED,IMMUTABLE]
- entity 14: OMAP3 ISP AF (1 pad, 1 link)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev6
pad0: Sink
<- "OMAP3 ISP CCDC":2 [ENABLED,IMMUTABLE]
- entity 15: OMAP3 ISP histogram (1 pad, 1 link)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev7
pad0: Sink
<- "OMAP3 ISP CCDC":2 [ENABLED,IMMUTABLE]
- entity 17: tvp514x 2-005d (1 pad, 1 link)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev8
pad0: Source
-> "OMAP3 ISP CCDC":0 []
