Glossary

• Adafruit TFP401 HDMI input. This board enables some limited testing of the video input to the A20-Olinuxino-Lime2's CSI1 interface before the custom ADV7611 board is ready. It supports video input only, so no audio! Mostly useful for bandwidth testing.
• bleeding panel. A bleeding panel is what happens when the thing is still turned on, but no data is being pushed to it.
• [CSI] This is not Camera Serial Interface, which is serial and a MIPI standard. This is CMOS Sensor Interface, which exposes a parallel data bus and signalling, and often only supports reduced rate and reduced colour gamut camera modules. In our case, we hope to push 24bit RGB at 75MHz to the CSI1 interface.
• dtb, dtsdevice tree binary resp. device tree source. Data structure describing the hardware components of a particular computer so that the operating system's kernel can use and manage those.
• dotclock The frequency with which dots (or pixels) are illuminated on the screen; how quickly a single dot can be produced on the screen. A general formula for calculating the dot frequency is: D x 1.25 x fH (the number of dots in a line multiplied by a constant between 1.25 and 1.3 multiplied by the horizontal scanning frequency).
• hpout: headphone out
• I2S (Inter-IC Sound), pronounced eye-squared-ess, is an electrical serial bus interface standard used for connecting digital audio devices together. It is used to communicate PCM audio data between integrated circuits in an electronic device.
• ov5640 Omnivision 5640 camera chip. Connects through CSI. Might be used for testing the CSI v4l2 driver for the A20 board. Not in a good enough shape yet according to https://linux-sunxi.org/CSI , as confirmed by libv's tests. Further documentation by mripard might be useful.
• vb2 dequeueing . vb2 stands for "video buffer". Dequeueing is the first out part of FIFO.