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RK3399 embedded development board MID platform debugging example analysis, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can get something.

RK3399's CPU adopts big.LITTLE large and small core architecture, double Cortex-A72 large core + four Cortex-A53 small core structure, greatly optimizes integer, floating point, memory, etc., and revolutionizes the overall performance, power consumption and core area. RK3399's GPU uses a new generation of quad-core ARM high-end image processor Mali-T860, integrates more bandwidth compression technologies such as intelligent superposition, ASTC, local pixel storage, etc., and supports more graphics and computing interfaces, with an overall performance improvement of 45% over the previous generation.

RK3399 development board, built the latest android7.1 system, 4G DDR3 memory, 32G EMMC storage, with 8.4inch HD IPS screen. RK3399 development board motherboard size is: 155*104mm, the design has a very rich interface, board 3 TTL UART,2 USB2.0 interface, one USB3.0 interface, WIFI/BT two-in-one, HDMI OUT, HDMI INT, Type C, 4G, IR, Ethernet, etc.; expandable modules include 4G module, Camera (13 million, 5 million) and other application function modules.

1. Screen + HDMI. SDK supports the method by default. The screen has interfaces such as EDP,LVDS,MIPI, which can be used in dts.

Enable the corresponding interface and shut down other unused interfaces.

two。 Dual LCD screen. The connection kernel needs to be patched RK3228/5.1/RK3288_dual_lcd.patch.

Considerations for using this patch:

(1) the default connection is LVDS + EDP. If it is a MIPI screen, please refer to the EDP screen driver to modify it.

(2) disp_mode is in DUAL_LCD mode, which is mainly used for product configurations that support dual LCD display.

? The attribute rockchip,disp-mode in the fb node is set to DUAL_LCD

? Rk_screen node opens two screen node configurations and sets the sceen_prop attribute to PRMRY

And EXTEND and include corresponding to the timing profile of the screen.

? LCDC0 and LCDC1 nodes open at the same time

? Open the two nodes that need to be used in EDP, MIPI, and LVDS, and close other device nodes that are not needed, such as

HDMI and MIPI

? Set the rockchip,uboot-logo-on= in the fb node

(3) double LCD screen usage, HWC also needs to be modified accordingly.

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