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:Check the amount of memory assigned to the CMA heap with “dmesg | grep cma”. The first line should be along the lines of:
: <pre>dmesg | grep cma</pre>
: <pre>[0.000000] cma: Reserved 256 MiB at 0x000000001ec00000</pre>
:If it reports less than '''96MB''' assigned to CMA, then edit /boot/cmdline.txt and add to the start of the line. Do NOT add any carriage returns.
:<pre>cma=96M</pre>
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: If (and only if) you have a device such as the C790 that supports the 22pin connector with all 4 lanes wired out, and are using a Compute Module with the CAM1 connector that also has all 4 lanes wired up, you can use:
: <pre>dtoverlay=tc358743,4lane=1</pre>
: Then '''reboot''' the raspberry Pi board, '''this is very important!DON'T miss this step!'''
: <pre>sudo reboot</pre>
:After adding the driver configuration, restart the Raspberry Pi for it to take effect. If all the configuration is well you should get a correct, execute '''ls /dev/video0video*''' device as followingin the terminal, and you should see video devices listed::<pre>ls /dev/video*</pre>:<pre>/dev/video0 /dev/video19 /dev/video20 /dev/video22 /dev/video24 /dev/video26 /dev/video28 /dev/video3 /dev/video31 /dev/video33 /dev/video35 /dev/video5 /dev/video7</pre>:<pre>/dev/video0video1 /dev/video2 /dev/video21 /dev/video23 /dev/video25 /dev/video27 /dev/video29 /dev/video30 /dev/video32 /dev/video34 /dev/video4 /dev/video6</pre>
2. Execute the following command to find the '''media node''' corresponding to the CSI as '''media0''', under the '''rp1-cfe (platform: 1f00128000.csi)''' field: