今日讯！RK3588-MIPI屏幕调试笔记:RK3588-MIPI-DSI之屏参配置
RK3588-MIPI屏幕调试笔记:RK3588-MIPI-DSI之屏参配置
2023-06-10今日讯！RK3588-MIPI屏幕调试笔记:RK3588-MIPI-DSI之屏参配置
(相关资料图)
1. 简介
专栏总目录本文是基于RK3588平台，MIPI屏调试之屏参配置解析2. 屏参dts配置
屏幕的时序参数表如下：signal timing
屏参对应的dts配置：
disp_timings1: display-timings { native-mode = < &dsi1_timing0 >;dsi1_timing0: timing0 {clock-frequency = < 159400000 >; hactive = < 1200 >;vactive = < 1920 >;hfront-porch = < 80 >;hsync-len = < 1 >;hback-porch = < 60 >;vfront-porch = < 35 >;vsync-len = < 1 >;vback-porch = < 25 >;hsync-active = < 0 >;vsync-active = < 0 >;de-active = < 0 >;pixelclk-active = < 1 >;};};解析：
Hactive：水平有效像素
Vactive：垂直有效像素
水平总周期 Htotal = Hactive + + hfront-porch +hsync-len + hback-porch
垂直总周期 Vtotal = Vactive + + vfront-porch + vsync-len + vback-porch
clock-frequency： 提供给lcd的时钟频率,一般屏的规格书都会给出, 也可以通过计算得到。
clock-frequency = 水平总周期 * 垂直总周期 * 帧率：clock-frequency = （hactive + hfront + hsync-len + hback）* (vactive + vfront + vsync-len + vback) * fps
名词解析
hactive： 横向分辨率。vactive: 纵向分辨率。hsync-len 行同步回扫时间。hback-porn： 行同步后肩时间。hfront-porn: 行同步前肩时间。vsync-len： 帧同步回扫时间。vback-porch： 帧同步后肩时间。vfront-proch： 帧同步前肩时间。de-active: DE 信号极性。hysnc-active： 行同步信号极性。vsync-active： 帧同步信号极性hback-porch/hfront-porch/hsync-len：水平同步信号vback-porch/vfront-porch/vsync-len：垂直同步信号审核编辑：汤梓红
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