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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/display/display_panel_port.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">屏适配指南</h1><div class="date inPage">4 Dec 2024</div><div style="color: gray;">
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Read time: 3 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><p class="- topic/p p" data-ofbid="d126418e22__20250121171601">本章节介绍 LCD 外设在 <span class="- topic/ph ph">Luban-Lite</span> 上的适配方法。用户可选择以下任意方式配置屏参数：</p><div class="- topic/p p" data-ofbid="d126418e27__20250121171601">
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<ul class="- topic/ul ul" id="display_screen_configuration__ul_zzy_l2g_d1c" data-ofbid="display_screen_configuration__ul_zzy_l2g_d1c"><li class="- topic/li li" data-ofbid="d126418e30__20250121171601">将以下屏参数写入 panel 驱动源码中：<div class="- topic/note note note note_note" id="display_screen_configuration__note_yzz_q2g_d1c" data-ofbid="display_screen_configuration__note_yzz_q2g_d1c"><span class="note__title">注：</span>
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<p class="- topic/p p" data-ofbid="d126418e34__20250121171601">对于屏时序参数，只有当 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 文件的 panel 结点没有设置
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display-timings 子节点时，此方式才会生效。</p>
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</div><ul class="- topic/ul ul" id="display_screen_configuration__ul_jqw_f2g_d1c" data-ofbid="display_screen_configuration__ul_jqw_f2g_d1c"><li class="- topic/li li" data-ofbid="d126418e41__20250121171601">时序参数</li><li class="- topic/li li" data-ofbid="d126418e43__20250121171601">屏接口参数</li></ul></li></ul>
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</div><section class="- topic/section section" id="display_screen_configuration__section_rjf_4gk_ndc" data-ofbid="display_screen_configuration__section_rjf_4gk_ndc"><h2 class="- topic/title title sectiontitle">屏配置方式</h2>
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<div class="- topic/p p" data-ofbid="d126418e51__20250121171601">
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<div class="- topic/div div" id="display_screen_configuration__div_qrj_xhs_2dc">
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<p class="- topic/p p" data-ofbid="d126418e55__20250121171601">方式一：将屏参数写入到 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 文件中。关于 <span class="+ topic/keyword pr-d/parmname keyword parmname">panel_lvds</span>
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参数，可查看 <a class="- topic/xref xref" href="display_parameter_panel_lvds.html">Panel_LVDS</a>。</p>
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</div>
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<div class="- topic/div div" id="display_screen_configuration__div_qmp_xhs_2dc">
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<p class="- topic/p p" data-ofbid="d126418e71__20250121171601">方式二：将屏参数写入 panel 驱动源码中。</p>
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<div class="- topic/note note tip note_tip" id="display_screen_configuration__note_xf4_qn3_ddc" data-ofbid="display_screen_configuration__note_xf4_qn3_ddc"><span class="note__title">提示：</span>
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<p class="- topic/p p" data-ofbid="d126418e76__20250121171601">仅在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 文件的 panel 结点不存在
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<span class="+ topic/keyword pr-d/parmname keyword parmname">display-timings</span> 子节点，方式二才会生效。</p>
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</div>
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<ul class="- topic/ul ul simple" id="display_screen_configuration__ul_s1f_4gs_2dc" data-ofbid="display_screen_configuration__ul_s1f_4gs_2dc"><li class="- topic/li li" data-ofbid="d126418e87__20250121171601">
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<p class="- topic/p p" data-ofbid="d126418e89__20250121171601">时序参数</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_screen_configuration__codeblock_gcb_rgs_2dc" data-ofbid="display_screen_configuration__codeblock_gcb_rgs_2dc"><em class="hl-comment">/* Init the videomode parameter, dts will override the initial value. */</em>
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<strong class="hl-keyword">static</strong> <strong class="hl-keyword">struct</strong> videomode panel_vm = {
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.pixelclock = <span class="hl-number">130000000</span>,
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.hactive = <span class="hl-number">1080</span>,
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.hfront_porch = <span class="hl-number">160</span>,
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.hback_porch = <span class="hl-number">160</span>,
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.hsync_len = <span class="hl-number">40</span>,
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.vactive = <span class="hl-number">1920</span>,
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.vfront_porch = <span class="hl-number">10</span>,
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.vback_porch = <span class="hl-number">20</span>,
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.vsync_len = <span class="hl-number">8</span>,
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.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
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DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE
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};</pre>
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</li><li class="- topic/li li" data-ofbid="d126418e95__20250121171601">
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<p class="- topic/p p" data-ofbid="d126418e97__20250121171601">屏接口参数</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_screen_configuration__codeblock_o1k_rgs_2dc" data-ofbid="display_screen_configuration__codeblock_o1k_rgs_2dc"><strong class="hl-keyword">struct</strong> panel_dsi dsi = {
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.mode = DSI_MOD_VID_BURST,
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.format = DSI_FMT_RGB888,
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.lane_num = <span class="hl-number">4</span>,
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};</pre>
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</li></ul>
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</div>
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</div>
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</section><section class="- topic/section section" id="display_screen_configuration__section_iqw_f2g_d1c" data-ofbid="display_screen_configuration__section_iqw_f2g_d1c"><h2 class="- topic/title title sectiontitle">屏配置步骤</h2>
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<p class="- topic/p p" data-ofbid="d126418e111__20250121171601">屏配置需要以下操作：</p>
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<ol class="- topic/ol ol" id="display_screen_configuration__ol_oqw_f2g_d1c" data-ofbid="display_screen_configuration__ol_oqw_f2g_d1c"><li class="- topic/li li" data-ofbid="d126418e115__20250121171601">为 LCD 适配一款 panel 驱动。</li><li class="- topic/li li" data-ofbid="d126418e117__20250121171601">确保一条正确的数据通路。</li></ol>
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<div class="- topic/p p" data-ofbid="d126418e120__20250121171601">具体配置步骤如下：<ol class="- topic/ol ol" id="display_screen_configuration__ol_mwz_v2g_d1c" data-ofbid="display_screen_configuration__ol_mwz_v2g_d1c"><li class="- topic/li li" data-ofbid="d126418e123__20250121171601">配置 panel 驱动：<ul class="- topic/ul ul" id="display_screen_configuration__ul_osf_csj_ndc" data-ofbid="display_screen_configuration__ul_osf_csj_ndc"><li class="- topic/li li" data-ofbid="d126418e126__20250121171601">
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<p class="- topic/p p" data-ofbid="d126418e128__20250121171601">使能 Luban SDK 提供的 RGB/ LVDS panel 驱动，详见 <a class="- topic/xref xref" href="display_menuconfig.html#display_menuconfig_configuration__li_enable_panel_drivers">Panel
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配置</a>。</p>
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</li><li class="- topic/li li" data-ofbid="d126418e135__20250121171601">
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<p class="- topic/p p" data-ofbid="d126418e137__20250121171601">编写一个 panel 驱动，详情可查看<a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="display_driver-intro.html">屏驱动支持</a>。</p>
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</li></ul></li><li class="- topic/li li" data-ofbid="d126418e144__20250121171601">数据通路<div class="- topic/p p" data-ofbid="d126418e146__20250121171601">LCD
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正常显示时，显示模块会形成一条完整的数据通道。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_screen_configuration__codeblock_ahl_hsh_mbc" data-ofbid="display_screen_configuration__codeblock_ahl_hsh_mbc">fb0 --> display engine --> display interface --> panel</pre></div><div class="- topic/p p" data-ofbid="d126418e150__20250121171601">数据通道的关系在
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<span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 中体现，以 LVDS
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屏幕为例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_screen_configuration__codeblock_y3n_lfg_d1c" data-ofbid="display_screen_configuration__codeblock_y3n_lfg_d1c">&fb0 {
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port {
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fb0_out: endpoint {
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remote-endpoint = <&de0_in>;
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};
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};
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};
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&de0 {
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status = <span class="hl-string">"okay"</span>;
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port@<span class="hl-number">0</span> {
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reg = <<span class="hl-number">0</span>>;
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de0_in: endpoint {
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remote-endpoint = <&fb0_out>;
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};
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};
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port@<span class="hl-number">1</span> {
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reg = <<span class="hl-number">1</span>>;
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de0_out: endpoint {
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remote-endpoint = <&lvds0_in>;
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};
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};
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};
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&rgb0 {
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status = <span class="hl-string">"disabled"</span>;
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port@<span class="hl-number">0</span> {
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reg = <<span class="hl-number">0</span>>;
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rgb0_in: endpoint {
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remote-endpoint = <&rgb0_in>;
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};
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};
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port@<span class="hl-number">1</span> {
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reg = <<span class="hl-number">1</span>>;
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rgb0_out: endpoint {
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remote-endpoint = <&panel_rgb_in>;
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};
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};
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};
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&lvds0 {
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status = <span class="hl-string">"okay"</span>;
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port@<span class="hl-number">0</span> {
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reg = <<span class="hl-number">0</span>>;
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lvds0_in: endpoint {
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remote-endpoint = <&de0_out>;
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};
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};
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port@<span class="hl-number">1</span> {
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reg = <<span class="hl-number">1</span>>;
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lvds0_out: endpoint {
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remote-endpoint = <&panel_lvds_in>;
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};
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};
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};
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&dsi0 {
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status = <span class="hl-string">"disabled"</span>;
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port@<span class="hl-number">0</span> {
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reg = <<span class="hl-number">0</span>>;
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dsi0_in: endpoint {
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remote-endpoint = <&dsi0_in>;
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};
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};
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port@<span class="hl-number">1</span> {
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reg = <<span class="hl-number">1</span>>;
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dsi0_out: endpoint {
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remote-endpoint = <&panel_dsi_in>;
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};
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};
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};</pre></div><div class="- topic/p p" data-ofbid="d126418e157__20250121171601">在上述例子中，<span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 通过 port 和
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status
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结点，配置了一条数据通道。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_screen_configuration__codeblock_hmw_lsh_mbc" data-ofbid="display_screen_configuration__codeblock_hmw_lsh_mbc">fb | de | | lvds | panel
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port --> port0 port1 --> port0 port1 --> port</pre></div><p class="- topic/p p" data-ofbid="d126418e164__20250121171601">如果
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<span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 中没有正确配置一条数据通道，显示驱动无法完成初始化。</p></li></ol></div>
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</section></div></article></main></div>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#display_screen_configuration__section_rjf_4gk_ndc" data-tocid="display_screen_configuration__section_rjf_4gk_ndc">屏配置方式</a></div></li><li class="section-item"><div class="section-title"><a href="#display_screen_configuration__section_iqw_f2g_d1c" data-tocid="display_screen_configuration__section_iqw_f2g_d1c">屏配置步骤</a></div></li></ul></div>
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<p class="p1">Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.</p>
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</div><div>
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<div class="generation_time">
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Update Time: 2025-01-21
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</div>
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</div>
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</div>
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</footer>
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<div id="go2top" class="d-print-none">
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<span class="oxy-icon oxy-icon-up"></span>
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</div>
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<div id="modal_img_large" class="modal">
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<span class="close oxy-icon oxy-icon-remove"></span>
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<div id="modal_img_container"></div>
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<div id="caption"></div>
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</div>
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<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
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</body>
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</html> |