Hi, All.
To grab an image with ov7675/ov7670 sensor, I use media-ctl to configure
isp pipeline.
my pipeline configuration: ov7670 -> CCDC -> preview -> preview
output,following “a ov7690 configuration”
<http://e2e.ti.com/support/dsp/omap_applications_processors/f/447/t/234507.aspx>
.
my configuration shell script:
#!/bin/sh
media-ctl -v -r
media-ctl -v -f '"ov7670 2-0021":0 [SBGGR8 320x240], "OMAP3 ISP CCDC":1 [SBGGR8
320x240],"OMAP3 ISP preview":1 [UYVY 320x240]'
media-ctl -v -l '"ov7670 2-0021":0 -> "OMAP3 ISP CCDC":0 [1]'
media-ctl -v -l '"OMAP3 ISP CCDC":2 -> "OMAP3 ISP preview":0 [1]'
media-ctl -v -l '"OMAP3 ISP preview":1 -> "OMAP3 ISP preview output":0 [1]'
command *“media-ctl -p“‘s* outputing seems ok.
Opening media device /dev/media0Enumerating entitiesFound 16
entitiesEnumerating pads and linksMedia controller API version 0.0.0
Media device information------------------------
driver omap3isp
model TI OMAP3 ISP
serial
bus info
hw revision 0xf0
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 [SGRBG10 4096x4096]
<- "OMAP3 ISP CCP2 input":0 []
pad1: Source [SGRBG10 4096x4096]
-> "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 [SGRBG10 4096x4096]
pad1: Source [SGRBG10 4096x4096]
-> "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 [SBGGR8 320x240]
<- "OMAP3 ISP CCP2":1 []
<- "OMAP3 ISP CSI2a":1 []
<- "ov7670 2-0021":0 [ENABLED]
pad1: Source [SBGGR8 320x240]
-> "OMAP3 ISP CCDC output":0 []
-> "OMAP3 ISP resizer":0 []
pad2: Source [SBGGR8 320x239]
-> "OMAP3 ISP preview":0 [ENABLED]
-> "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 [SGRBG10 320x240 (8,4)/306x232]
<- "OMAP3 ISP CCDC":2 [ENABLED]
<- "OMAP3 ISP preview input":0 []
pad1: Source [UYVY 306x232]
-> "OMAP3 ISP preview output":0 [ENABLED]
-> "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 [ENABLED]
- entity 10: OMAP3 ISP resizer (2 pads, 4 links)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev4
pad0: Sink [YUYV 306x232 (0,0)/306x232]
<- "OMAP3 ISP CCDC":1 []
<- "OMAP3 ISP preview":1 []
<- "OMAP3 ISP resizer input":0 []
pad1: Source [YUYV 320x240]
-> "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 16: ov7670 2-0021 (1 pad, 1 link)
type V4L2 subdev subtype Unknown
device node name /dev/v4l-subdev8
pad0: Source [SBGGR8 320x240]
-> "OMAP3 ISP CCDC":0 [ENABLED]
But when grabing picture, yavta report a error “Unable to start streaming:
Broken pipe (32)”,and exit. I checked error -32 EPIPE
<http://linuxtv.org/downloads/v4l-dvb-apis/vidioc-streamon.html>, it means
“The driver implements pad-level format configuration and the pipeline
configuration is invalid”, why?
#yavta -f UYVY -f UYVY -s 306x232 -c=1 --stdout /dev/video4Device /dev/video4
opened.Device `OMAP3 ISP preview output' on `media' is a video capture device.
Video format set: UYVY (59565955) 306x232 (stride 640) buffer size 148480
Video format: UYVY (59565955) 306x232 (stride 640) buffer size 148480
8 buffers requested.
length: 148480 offset: 0
Buffer 0 mapped at address 0x4006a000.
length: 148480 offset: 151552
Buffer 1 mapped at address 0x40291000.
length: 148480 offset: 303104
Buffer 2 mapped at address 0x402c5000.
length: 148480 offset: 454656
Buffer 3 mapped at address 0x403c6000.
length: 148480 offset: 606208
Buffer 4 mapped at address 0x4046b000.
length: 148480 offset: 757760
Buffer 5 mapped at address 0x404ad000.
length: 148480 offset: 909312
Buffer 6 mapped at address 0x404f4000.
length: 148480 offset: 1060864
Buffer 7 mapped at address 0x405eb000.
Unable to start streaming: Broken pipe (32).
8 buffers released.
--
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