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全球熱頭條丨RK3588-MIPI屏幕調試筆記:RK3588-MIPI-DSI之屏參配置

來源:jf_30051736 發(fā)布時間:2023-06-11 01:15:17


【資料圖】

1. 簡介

專欄總目錄本文是基于RK3588平臺,MIPI屏調試之屏參配置解析

2. 屏參dts配置

屏幕的時序參數表如下:

signal timing

屏參對應的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的時鐘頻率,一般屏的規(guī)格書都會給出, 也可以通過計算得到。

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          行同步回掃時間。hback-porn:   行同步后肩時間。hfront-porn:        行同步前肩時間。vsync-len:         幀同步回掃時間。vback-porch:       幀同步后肩時間。vfront-proch:      幀同步前肩時間。de-active:          DE 信號極性。hysnc-active:      行同步信號極性。vsync-active:      幀同步信號極性hback-porch/hfront-porch/hsync-len:水平同步信號vback-porch/vfront-porch/vsync-len:垂直同步信號

審核編輯:湯梓紅

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