OV5647 spec allows 1-lane mode and selection of default lane, can raspiraw deal with that?

[HermannSW]

https://cdn.sparkfun.com/datasheets/Dev ... 7_full.pdf

1. Can raspiraw use only 1 lane from CSI-2 connector?
2. Can it work with only lane-1 and only lane-2?
3. If so, would custom made CSI-2 connectors allow two raspiraw programs running in parallel to capture video on its one lane from two v1 cameras in parallel?
   (2nd camera would need its own MIPI I2C and CLK lines)
4. Is it correct than 1-lane mode would suffice for 640x480 at 90fps?
   [640*480*(10/8)*90 < 33MB/s = 264Mbit/s < 1Gbps]
5. If that calculation is right, do all the other v1 modes fit into 1Gbps as well?

   Code: Select all

   $ bc -ql
   1296*730*(10/8)*49/(1024*1024)*8
   442.10357666015625000000
   1296*972*(10/8)*42/(1024*1024)*8
   504.56909179687500000000
   2592*1944*(10/8)*15/(1024*1024)*8
   720.81298828125000000000
   1920*1080*(10/8)*30/(1024*1024)*8
   593.26171875000000000000
   

[6by9]

1. Yes. Use the data_lanes field of the MMAL_PARAMETER_CAMERA_RX_CONFIG_T structure
2. Only lane-1, yes. Only lane-2, no.
3. An SD card interface can run as 1, 4, or 8 bits wide. Would you expect to be able to wire up 8 SD cards at one bit wide? Simply, no, it won't work.
4. If your PLL settings are such that it has sufficient pixel clock rate, then potentially.
5. See 4. How are you setting up the clock structure within the sensor, and is that sufficient for the sensor to be able to clock the CSI at that rate? Does that doubled lane frequency cause you more issues with EMC?