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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" title="Edit this document" 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">15 Jan 2024</div><div style="color: gray;">
Read time: 4 minute(s)
</div>
<div class="- topic/body concept/conbody body conbody">
<p class="- topic/p p" data-ofbid="d139431e33__20250123155213">本章节介绍 LCD 外设在 <span class="- topic/ph ph">Luban</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="d139431e39__20250123155213">
<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="d139431e43__20250123155213">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> <div class="note__body">
<p class="- topic/p p" data-ofbid="d139431e47__20250123155213">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
display-timings 子节点时，此方式才会生效。</p>
</div></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="d139431e55__20250123155213">时序参数<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_screen_configuration__codeblock_nhl_hfg_d1c" data-ofbid="display_screen_configuration__codeblock_nhl_hfg_d1c"><code><em class="hl-comment">/* Init the videomode parameter, dts will override the initial value. */</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">struct</strong> videomode panel_vm = {
.pixelclock = <span class="hl-number">130000000</span>,
.hactive = <span class="hl-number">1080</span>,
.hfront_porch = <span class="hl-number">160</span>,
.hback_porch = <span class="hl-number">160</span>,
.hsync_len = <span class="hl-number">40</span>,
.vactive = <span class="hl-number">1920</span>,
.vfront_porch = <span class="hl-number">10</span>,
.vback_porch = <span class="hl-number">20</span>,
.vsync_len = <span class="hl-number">8</span>,
.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE
};
</code></pre></li>
<li class="- topic/li li" data-ofbid="d139431e60__20250123155213">屏接口参数<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_screen_configuration__codeblock_hbp_hfg_d1c" data-ofbid="display_screen_configuration__codeblock_hbp_hfg_d1c"><code><strong class="hl-keyword">static</strong> <strong class="hl-keyword">int</strong> panel_bind(<strong class="hl-keyword">struct</strong> device *dev, <strong class="hl-keyword">struct</strong> device *master, <strong class="hl-keyword">void</strong> *data)
{
...
dsi-&gt;format = DSI_FMT_RGB888;
dsi-&gt;mode = DSI_MOD_VID_PULSE;
dsi-&gt;lane_num = <span class="hl-number">4</span>;
...
}</code></pre></li>
</ul></li>
</ul>
</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>
<div class="- topic/p p" data-ofbid="d139431e73__20250123155213">
<div class="- topic/div div" id="display_screen_configuration__div_qrj_xhs_2dc">
<p class="- topic/p p" data-ofbid="d139431e77__20250123155213">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>
参数，可查看 <a class="- topic/xref xref" href="display_parameter_panel_lvds.html">Panel_LVDS</a>。</p>
</div>
<div class="- topic/div div" id="display_screen_configuration__div_qmp_xhs_2dc">
<p class="- topic/p p" data-ofbid="d139431e93__20250123155213">方式二：将屏参数写入 panel 驱动源码中。</p>
<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> <div class="note__body">
<p class="- topic/p p" data-ofbid="d139431e98__20250123155213">仅在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 文件的 panel 结点不存在
<span class="+ topic/keyword pr-d/parmname keyword parmname">display-timings</span> 子节点，方式二才会生效。</p>
</div></div>
<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="d139431e110__20250123155213">
<p class="- topic/p p" data-ofbid="d139431e112__20250123155213">时序参数</p>
<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"><code><em class="hl-comment">/* Init the videomode parameter, dts will override the initial value. */</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">struct</strong> videomode panel_vm = {
.pixelclock = <span class="hl-number">130000000</span>,
.hactive = <span class="hl-number">1080</span>,
.hfront_porch = <span class="hl-number">160</span>,
.hback_porch = <span class="hl-number">160</span>,
.hsync_len = <span class="hl-number">40</span>,
.vactive = <span class="hl-number">1920</span>,
.vfront_porch = <span class="hl-number">10</span>,
.vback_porch = <span class="hl-number">20</span>,
.vsync_len = <span class="hl-number">8</span>,
.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE
};</code></pre>
</li>
<li class="- topic/li li" data-ofbid="d139431e119__20250123155213">
<p class="- topic/p p" data-ofbid="d139431e121__20250123155213">屏接口参数</p>
<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"><code><strong class="hl-keyword">struct</strong> panel_dsi dsi = {
.mode = DSI_MOD_VID_BURST,
.format = DSI_FMT_RGB888,
.lane_num = <span class="hl-number">4</span>,
};</code></pre>
</li>
</ul>
</div>
</div>
</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>
<p class="- topic/p p" data-ofbid="d139431e137__20250123155213">屏配置需要以下操作：</p>
<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="d139431e142__20250123155213">为 LCD 适配一款 panel 驱动。</li>
<li class="- topic/li li" data-ofbid="d139431e145__20250123155213">确保一条正确的数据通路。</li>
</ol>
<div class="- topic/p p" data-ofbid="d139431e149__20250123155213">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="d139431e153__20250123155213">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="d139431e157__20250123155213">
<p class="- topic/p p" data-ofbid="d139431e159__20250123155213">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
配置</a>。</p>
</li>
<li class="- topic/li li" data-ofbid="d139431e167__20250123155213">
<p class="- topic/p p" data-ofbid="d139431e169__20250123155213">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>
</li>
</ul></li>
<li class="- topic/li li" data-ofbid="d139431e178__20250123155213">数据通路<div class="- topic/p p" data-ofbid="d139431e180__20250123155213">LCD
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"><code>fb0 --&gt; display engine --&gt; display interface --&gt; panel</code></pre></div><div class="- topic/p p" data-ofbid="d139431e184__20250123155213">数据通道的关系在
<span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 中体现，以 LVDS
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"><code>&amp;fb0 {
port {
fb0_out: endpoint {
remote-endpoint = &lt;&amp;de0_in&gt;;
};
};
};
&amp;de0 {
status = <span class="hl-string">"okay"</span>;
port@<span class="hl-number">0</span> {
reg = &lt;<span class="hl-number">0</span>&gt;;
de0_in: endpoint {
remote-endpoint = &lt;&amp;fb0_out&gt;;
};
};
port@<span class="hl-number">1</span> {
reg = &lt;<span class="hl-number">1</span>&gt;;
de0_out: endpoint {
remote-endpoint = &lt;&amp;lvds0_in&gt;;
};
};
};
&amp;rgb0 {
status = <span class="hl-string">"disabled"</span>;
port@<span class="hl-number">0</span> {
reg = &lt;<span class="hl-number">0</span>&gt;;
rgb0_in: endpoint {
remote-endpoint = &lt;&amp;rgb0_in&gt;;
};
};
port@<span class="hl-number">1</span> {
reg = &lt;<span class="hl-number">1</span>&gt;;
rgb0_out: endpoint {
remote-endpoint = &lt;&amp;panel_rgb_in&gt;;
};
};
};
&amp;lvds0 {
status = <span class="hl-string">"okay"</span>;
port@<span class="hl-number">0</span> {
reg = &lt;<span class="hl-number">0</span>&gt;;
lvds0_in: endpoint {
remote-endpoint = &lt;&amp;de0_out&gt;;
};
};
port@<span class="hl-number">1</span> {
reg = &lt;<span class="hl-number">1</span>&gt;;
lvds0_out: endpoint {
remote-endpoint = &lt;&amp;panel_lvds_in&gt;;
};
};
};
&amp;dsi0 {
status = <span class="hl-string">"disabled"</span>;
port@<span class="hl-number">0</span> {
reg = &lt;<span class="hl-number">0</span>&gt;;
dsi0_in: endpoint {
remote-endpoint = &lt;&amp;dsi0_in&gt;;
};
};
port@<span class="hl-number">1</span> {
reg = &lt;<span class="hl-number">1</span>&gt;;
dsi0_out: endpoint {
remote-endpoint = &lt;&amp;panel_dsi_in&gt;;
};
};
};</code></pre></div><div class="- topic/p p" data-ofbid="d139431e191__20250123155213">在上述例子中，<span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 通过 port 和
status
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"><code>fb | de | | lvds | panel
port --&gt; port0 port1 --&gt; port0 port1 --&gt; port</code></pre></div><p class="- topic/p p" data-ofbid="d139431e198__20250123155213">如果
<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>
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