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DRA74: DRA744,DRA746

Part Number: DRA74

Hi

    There are some video input port questions,

1.We use vin3a & vin4b to receive BT656 format signals( clk, D[0:7],  but we could only recognize H/L by  GPIO,

    not in video format. Is there any setting besides these pinmux of their 9 pins needed  

Pins of vin3a:B11,B7,B8,A7,A8,C9,A9,B9,A10

Pins of vin4b: N9,P5,R5,R9,P6,T7,T6,T9,R6

2.We use vin2a to receive 480p 24 bits DRGB signals( DE, H/V, clock, D[0:23])

How to set it reading in DE-mode(DE,clk,data) or HV-mode(H/V,clk,data)?

Is the resolution should be set before?   

  • Hi,

    You need to configure pinmux for all the data lines and control lines (e.g. hsync, vsync, clk, de, etc)

    Also, setup any board muxes if you have on the board.

    Assuming you are using Linux, the V4L2 subdevice has different operations that need to be implemented.

    one of this is the g_fmt operation where the resolution has to be returned.

    This means no need to hard code the resolutions, you can add your logic to figure out the resolution in this subdev driver and return the final resolution.

    Nikhil D

  • Nikhil,
    Because our SW team member, Shawn LIn, has post with title "Fail to capture video signal from vin-4b", so I will close this question
    and follow that one.