(相關(guān)資料圖)

1. 簡介

2. 屏參dts配置

signal timing

屏參對(duì)應(yīng)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

水平總周期 Htotal = Hactive + + hfront-porch +hsync-len + hback-porch

垂直總周期 Vtotal = Vactive + + vfront-porch + vsync-len + vback-porch

clock-frequency： 提供給lcd的時(shí)鐘頻率,一般屏的規(guī)格書都會(huì)給出, 也可以通過計(jì)算得到。

clock-frequency = 水平總周期 * 垂直總周期  * 幀率：

clock-frequency = （hactive + hfront + hsync-len + hback）* (vactive + vfront + vsync-len + vback) * fps

名詞解析

hactive：          橫向分辨率。vactive:            縱向分辨率。hsync-len          行同步回掃時(shí)間。hback-porn：   行同步后肩時(shí)間。hfront-porn:        行同步前肩時(shí)間。vsync-len：         幀同步回掃時(shí)間。vback-porch：       幀同步后肩時(shí)間。vfront-proch：      幀同步前肩時(shí)間。de-active:          DE 信號(hào)極性。hysnc-active：      行同步信號(hào)極性。vsync-active：      幀同步信號(hào)極性hback-porch/hfront-porch/hsync-len：水平同步信號(hào)vback-porch/vfront-porch/vsync-len：垂直同步信號(hào)

審核編輯：湯梓紅