SPRACD8 June   2019 DRA710 , DRA712 , DRA714 , DRA716 , DRA718 , DRA722 , DRA724 , DRA725 , DRA726 , DRA744 , DRA745 , DRA746 , DRA74P , DRA750 , DRA756 , DRA75P , DRA76P , DRA77P , DRA780 , DRA781 , DRA782 , DRA783 , DRA786 , DRA787 , DRA790 , DRA791 , DRA793 , DRA797 , TDA2EG-17 , TDA2HF , TDA2HG , TDA2HV , TDA2LF , TDA2P-ABZ , TDA2P-ACD , TDA2SA , TDA2SG , TDA2SX

 

  1.   Integrating New Cameras With Video Input Port on DRA7xx SoCs
    1.     Trademarks
    2. 1 Introduction
    3. 2 Video Input Port and Possible Video Sources
    4. 3 Kernel Changes to Integrate Camera Devices
      1. 3.1 V4L2 Endpoint Framework
        1. 3.1.1 VIP Device Definition
        2. 3.1.2 Camera Device Definition
      2. 3.2 Interfacing a Multichannel Video Source (TVP5158)
      3. 3.3 Interfacing a Camera Over LVDS Serializer Deserializer
        1. 3.3.1 I2C Address Remapping
        2. 3.3.2 Serializer/Deserializer Configuration
        3. 3.3.3 Serdes Device Definition
      4. 3.4 Setting up Pinmux and IODELAY
        1. 3.4.1 Getting Pinmux and IODELAY Values
      5. 3.5 Setting Up Board Muxes

3.1.2 Camera Device Definition

ov10635@35{ compatible = "ovti,ov10633"; reg = <0x35>; mux-gpios = <&pcf_hdmi 3 GPIO_ACTIVE_LOW>; ... port { cam1: endpoint { remote-endpoint = <&vin1a>; hsync-active = <1>; vsync-active = <1>; pclk-sample = <0>; bus-width = <8>; }; }; };

The above snippet describes the camera device. Standard properties about video interface can be described with the endpoint device nodes itself. This minimizes the communication between the SoC driver and the camera driver. This example describes:

  • An 8-bit camera device connected to the vin1a port of the VIP device
  • Hsync/Vsync signals are active HIGH
  • Data needs to be sampled at falling edge of pixel clock.