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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/boot/logo-display.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">图像显示</h1><div class="date inPage">4 Dec 2024</div><div style="color: gray;">
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Read time: 8 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><p class="- topic/p p" data-ofbid="d195760e22__20250121171632">本章节主要介绍 U-Boot 阶段 LOGO 显示的相关内容。</p><p class="- topic/p p" data-ofbid="d195760e24__20250121171632">U-Boot 驱动模型支持 Graphics，ArtInChip 平台中的显示驱动基于该框架进行实现。
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但驱动内部逻辑参考了 Kernel 中的显示驱动，对新屏适配可参考 SDK 指南中的显示模块使用指南。</p><section class="- topic/section section" id="concept_azt_bl3_pzb__section_mrf_sfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_mrf_sfh_bzb"><h2 class="- topic/title title sectiontitle">相关术语</h2>
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<div class="table-container"><table class="- topic/table table frame-all" id="concept_azt_bl3_pzb__table_yd2_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__table_yd2_rfh_bzb" data-cols="3"><caption></caption><colgroup><col style="width:22.573363431151243%"/><col style="width:32.50564334085779%"/><col style="width:44.92099322799098%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-0 rowsep-0" id="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__1">术语</th><th class="- topic/entry entry colsep-0 rowsep-0" id="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__2">定义</th><th class="- topic/entry entry colsep-0 rowsep-0" id="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__3">注释说明</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__1">DE</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__2">Display Engine</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__3">显示引擎</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__1">DI</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__2">Display Interface</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__3">显示接口，包括 RGB/LVDS/DSI 等</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__1">PANEL</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__2">panel</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__3">外接屏幕驱动</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__1">RGB</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__2">Red Green Blue</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__3">按红绿蓝三原色编码的显示接口标准</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__1">LVDS</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__2">Low Voltage Differential Signaling</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__3">低压差分信号的显示接口标准</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__1">MIPI-DSI</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__2">Mipi Display Serial Interface</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_azt_bl3_pzb__table_yd2_rfh_bzb__entry__3">Mipi 组织定义的一个显示接口标准</td></tr></tbody></table></div>
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</section><section class="- topic/section section" id="concept_azt_bl3_pzb__section_zd2_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_zd2_rfh_bzb"><h2 class="- topic/title title sectiontitle">驱动框架</h2>
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<p class="- topic/p p" data-ofbid="d195760e93__20250121171632">相关配置为：</p>
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<ul class="- topic/ul ul" id="concept_azt_bl3_pzb__ul_a22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__ul_a22_rfh_bzb"><li class="- topic/li li" data-ofbid="d195760e97__20250121171632">
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<p class="- topic/p p" data-ofbid="d195760e99__20250121171632">CONFIG_DM_VIDEO</p>
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</li><li class="- topic/li li" data-ofbid="d195760e102__20250121171632">
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<p class="- topic/p p" data-ofbid="d195760e104__20250121171632">CONFIG_DISPLAY</p>
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</li><li class="- topic/li li" data-ofbid="d195760e107__20250121171632">
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<p class="- topic/p p" data-ofbid="d195760e109__20250121171632">CONFIG_VIDEO_ARTINCHIP</p>
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</li></ul>
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<p class="- topic/p p" data-ofbid="d195760e113__20250121171632">相关源码有：</p>
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<ul class="- topic/ul ul" id="concept_azt_bl3_pzb__ul_b22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__ul_b22_rfh_bzb"><li class="- topic/li li" data-ofbid="d195760e117__20250121171632">
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<p class="- topic/p p" data-ofbid="d195760e119__20250121171632"><span class="+ topic/ph sw-d/filepath ph filepath">drivers/video/artinchip/</span></p>
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</li><li class="- topic/li li" data-ofbid="d195760e123__20250121171632">
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<p class="- topic/p p" data-ofbid="d195760e125__20250121171632"><span class="+ topic/ph sw-d/filepath ph filepath">board/artinchip/d211/d211.c</span></p>
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</li></ul>
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</section><section class="- topic/section section" id="concept_azt_bl3_pzb__section_c22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_c22_rfh_bzb"><h2 class="- topic/title title sectiontitle">预留内存</h2>
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<div class="- topic/p p" data-ofbid="d195760e135__20250121171632">在代码重定位前，U-Boot 会在 DRAM 的顶部预留出一块连续内存 <code class="+ topic/ph pr-d/codeph ph codeph">video buffer</code> ，用于保存 LOGO
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信息。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_azt_bl3_pzb__codeblock_sbz_ptr_c1c" data-ofbid="concept_azt_bl3_pzb__codeblock_sbz_ptr_c1c">board_init_f(); <em class="hl-comment">// common/board_f.c</em>
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|-> reserve_video() <em class="hl-comment">// reserve video buffer</em></pre></div>
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<p class="- topic/p p" data-ofbid="d195760e143__20250121171632"><span class="+ topic/keyword pr-d/apiname keyword apiname">reserve_video()</span> 会遍历 <code class="+ topic/ph pr-d/codeph ph codeph">uclass_video</code> 链表，解析
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<span class="+ topic/keyword pr-d/parmname keyword parmname">struct video_uc_platdata</span> 中的 <span class="+ topic/keyword pr-d/parmname keyword parmname">size</span>
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属性是否被设置，如果不为零，即在 DRAM 顶部预留一块大小为 <span class="+ topic/keyword pr-d/parmname keyword parmname">size</span> 的 buffer，并将这块 buffer
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的起始地址和结束地址存入 <span class="+ topic/keyword pr-d/apiname keyword apiname">gd->video_bottom</span> 和 <span class="+ topic/keyword pr-d/apiname keyword apiname">gd->video_top</span>
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。随后 Boot 重置 DRAM 中可用内存的起始地址，减去这块 buffer。</p>
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<div class="- topic/p p" data-ofbid="d195760e167__20250121171632">预留内存的大小在 U-Boot DM
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驱动模型第一次初始化时设定。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_azt_bl3_pzb__codeblock_vxs_qtr_c1c" data-ofbid="concept_azt_bl3_pzb__codeblock_vxs_qtr_c1c">board_init_f(); <em class="hl-comment">// common/board_f.c</em>
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|-> initf_dm();
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| |-> device_bind_common()
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| |-> drv->bind(dev)
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| aicfb_bind() <em class="hl-comment">// drivers/video/artinchip/aic_fb.c</em>
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| <em class="hl-comment">// 为 platdata 中的 size 赋值</em>
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| ...
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|-> reserve_video() <em class="hl-comment">// reserve video buffer</em></pre></div>
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</section><section class="- topic/section section" id="concept_azt_bl3_pzb__section_f22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_f22_rfh_bzb"><h2 class="- topic/title title sectiontitle">初始化流程</h2>
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<div class="- topic/p p" data-ofbid="d195760e177__20250121171632">显示驱动的初始化发生在 U-Boot 重定位之后，LOGO
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加载之前，probe 流程如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_azt_bl3_pzb__codeblock_cck_rtr_c1c" data-ofbid="concept_azt_bl3_pzb__codeblock_cck_rtr_c1c">|-> board_init_r(); <em class="hl-comment">// common/board_r.c</em>
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| |-> board_late_init()
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| | |-> board_show_logo <em class="hl-comment">//board/artinchip/d211/d211.c</em>
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| |-> uclass_first_device
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| |-> device_probe()
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| |-> aicfb_probe() <em class="hl-comment">// drivers/video/artinchip/aic_fb.c</em>
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| |
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| +---------------+
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| |
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| |-> aicfb_find_de()
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| | | -> uclass_get_device_by_ofnode()
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| | |-> uclass_get_device_tail()
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| | |-> device_probe()
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| | aic_de_probe() <em class="hl-comment">// drivers/video/artinchip/aic_de.c</em>
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| |-> aicfb_find_di()
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| | | -> uclass_get_device_by_ofnode()
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| | |-> uclass_get_device_tail()
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| | |-> device_probe()
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| | aic_rgb_probe() / lvds_probe() / aic_dsi_probe()
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| | <em class="hl-comment">// 这三个函数的关系为三选一，分别位于</em>
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| | <em class="hl-comment">// drivers/video/artinchip/aic_rgb.c</em>
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| | <em class="hl-comment">// drivers/video/artinchip/aic_lvds.c</em>
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| | <em class="hl-comment">// drivers/video/artinchip/aic_dsi.c</em>
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| |-> aicfb_find_panel()
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| | | -> uclass_get_device_by_ofnode()
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| | |-> uclass_get_device_tail()
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| | |-> device_probe()
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| | |-> panel_probe() <em class="hl-comment">// drivers/video/artinchip/panel_xxx.c</em>
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| ...
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|-> board_prepare_logo <em class="hl-comment">// 加载 logo</em>
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|-> aicfb_enable_panel</pre></div>
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<p class="- topic/p p" data-ofbid="d195760e182__20250121171632">在 probe 过程中并没有开启显示模块，只是设置了相关参数。在 LOGO 加载进 video buffer 后，U-Boot 才会调用
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<span class="+ topic/keyword pr-d/apiname keyword apiname">aicfb_enable_panel</span> 执行显示模块的 enable 操作。</p>
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</section><section class="- topic/section section" id="concept_azt_bl3_pzb__section_h22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_h22_rfh_bzb"><h2 class="- topic/title title sectiontitle">LOGO 加载</h2>
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<p class="- topic/p p" data-ofbid="d195760e193__20250121171632">ArtInChip 平台支持从 MMC、SPI NAND 和 SPI NOR 等启动介质中加载 <span class="+ topic/ph sw-d/filepath ph filepath">png/jpg</span> 图片进行硬解码并居中显示。</p>
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<div class="- topic/p p" data-ofbid="d195760e199__20250121171632">加载的过程为：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_azt_bl3_pzb__codeblock_hjh_str_c1c" data-ofbid="concept_azt_bl3_pzb__codeblock_hjh_str_c1c">|-> board_late_init <em class="hl-comment">// common/board_r.c</em>
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|-> board_show_logo <em class="hl-comment">// board/artinchip/d211/d211.c</em>
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|-> board_prepare_logo()
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| |-> mmc_load_logo() <em class="hl-comment">// mmc 启动</em>
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| |-> spinand_load_logo() <em class="hl-comment">// spinand 启动</em>
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| |-> spinor_load_logo() <em class="hl-comment">// spinor 启动</em>
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| |-> aic_logo_decode() <em class="hl-comment">// 对 boot logo image 进行解码</em>
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| |-> aicfb_enable_panel() <em class="hl-comment">// 开启显示模块</em></pre></div>
|
||
</section><section class="- topic/section section" id="concept_azt_bl3_pzb__section_j22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_j22_rfh_bzb"><h2 class="- topic/title title sectiontitle">硬件时序要求</h2><p class="- topic/p p" data-ofbid="d195760e207__20250121171632">DE、DI、panel 三个硬件模块在初始化时有一些时序上的要求，包含先后顺序、延迟大小，主要约束来自于 panel 侧。所以，当接入新的 panel 型号，必须要严格按照手册来完成硬件的初始化。
|
||
为了应对这样的硬件特性，驱动设计中使用 callback 方式来实现多个模块间的互相调用。</p><div class="- topic/p p" data-ofbid="d195760e209__20250121171632"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="concept_azt_bl3_pzb__image_k22_rfh_bzb" src="../../../images/display/display_callbacks.png" width="480"/></div><br/></div><p class="- topic/p p" data-ofbid="d195760e211__20250121171632">在显示模块的 enable 操作中，会调用这些回调来完成初始化，如下图（其中关系比较绕的是 panel 初始化逻辑）</p><div class="- topic/p p" data-ofbid="d195760e213__20250121171632"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="concept_azt_bl3_pzb__image_l22_rfh_bzb" src="../../../images/display/fb_bind.png" width="576"/></div><br/></div><div class="- topic/note note tip note_tip" id="concept_azt_bl3_pzb__note_cvv_str_c1c" data-ofbid="concept_azt_bl3_pzb__note_cvv_str_c1c"><span class="note__title">提示：</span>
|
||
<p class="- topic/p p" data-ofbid="d195760e217__20250121171632">该部分逻辑与 kernel 中的显示驱动保持一致，不同点在与 enable 的调用时间不同。详情可参考 SDK 指南中的显示模块使用指南</p>
|
||
</div></section><section class="- topic/section section" id="concept_azt_bl3_pzb__section_m22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_m22_rfh_bzb"><h2 class="- topic/title title sectiontitle">LOGO 保持</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d195760e225__20250121171632">U-Boot 在显示 LOGO 后，会把 video buffer 的信息，包括 buffer 起始地址，大小等添加到 kernel 解析的 dtb 文件中。
|
||
具体的方式为：在 dtb 文件的 reserved momory 结点中插入一个子节点，子节点中保存有 address 和 size 信息。 过程如下所示：</p>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_azt_bl3_pzb__pre_n22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__pre_n22_rfh_bzb">|-> image_setup_libfdt()
|
||
|-> ft_board_setup()
|
||
|-> fdtdec_add_reserved_memory()</pre>
|
||
<p class="- topic/p p" data-ofbid="d195760e231__20250121171632">Kernel 在启动时不会修改这块内存，kernel 中的显示驱动在初始化时，会将 video buffer 中的内容 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">memcopy</span>
|
||
到 <span class="+ topic/ph sw-d/filepath ph filepath">fb0</span> 中，从而保证 LOGO 可以从 U-Boot 保持到 kernel 启动，直到应用程序修改
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">fb0</span> 文件。kernel 在 memcopy 操作之后，会将 video buffer 释放。</p>
|
||
</section><section class="- topic/section section" id="concept_azt_bl3_pzb__section_o22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_o22_rfh_bzb"><h2 class="- topic/title title sectiontitle">更换 LOGO</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d195760e248__20250121171632">ArtInChip 平台支持开机 logo，还支持在 usb 烧录，SD 卡升级和 U 盘升级时显示 logo，并且允许在不同的场景显示不同的 logo 图片。</p>
|
||
<div class="- topic/p p" data-ofbid="d195760e251__20250121171632">Luban SDK 使用 <span class="+ topic/ph sw-d/filepath ph filepath">itb</span> (uboot FIT image) 文件格式来管理不同的 logo 图片，相关的
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">its</span> (image tree source) 配置文件位于
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">target/<var class="+ topic/keyword sw-d/varname keyword varname">IC</var>/common/logo.its</span>。Luban SDK
|
||
在编译时，会把配置文件中指定的图片打包成 <span class="+ topic/ph sw-d/filepath ph filepath">logo.itb</span> 文件。 <span class="+ topic/ph sw-d/filepath ph filepath">logo.itb</span>
|
||
文件在烧录时会被加载进 logo 分区。如果想为某块单板维护一个 <span class="+ topic/ph sw-d/filepath ph filepath">its</span> 文件，可以将配置文件拷贝一份到板级目录，再修改
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">target/<var class="+ topic/keyword sw-d/varname keyword varname">IC</var>/<var class="+ topic/keyword sw-d/varname keyword varname">Board</var>/logo.its</span>。<div class="- topic/note note note note_note" data-ofbid="d195760e284__20250121171632"><span class="note__title">注：</span> 如果板级
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">its</span> 文件存在， Luban SDK 优先链接板级配置文件。</div></div>
|
||
<div class="- topic/p p" data-ofbid="d195760e290__20250121171632">ArtInChip 平台支持以下格式的 logo 文件，uboot 会自动解析 logo 文件的文件头，以此来判断 logo 文件的具体格式：<ul class="- topic/ul ul" data-ofbid="d195760e292__20250121171632"><li class="- topic/li li" data-ofbid="d195760e293__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d195760e295__20250121171632"><strong class="+ topic/ph hi-d/b ph b">PNG LOGO</strong></p>
|
||
<ul class="- topic/ul ul" data-ofbid="d195760e299__20250121171632"><li class="- topic/li li" data-ofbid="d195760e300__20250121171632">
|
||
<div class="- topic/p p" data-ofbid="d195760e302__20250121171632">ArtInChip 平台默认使用 png 格式 logo，图片保存路径为
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">target/<var class="+ topic/keyword sw-d/varname keyword varname">IC</var>/<var class="+ topic/keyword sw-d/varname keyword varname">Board</var>/logo/boot_logo.png</span>。<div class="- topic/note note note note_note" data-ofbid="d195760e313__20250121171632"><span class="note__title">注：</span> 图片必须命名为
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">boot_logo.png</span>。</div></div>
|
||
</li><li class="- topic/li li" data-ofbid="d195760e319__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d195760e321__20250121171632">Luban SDK 编译时，编译脚本会在 logo 目录下检索
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">boot_logo.png</span> 文件，如果文件存在，就把它打包进
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">logo.itb</span> 文件。</p>
|
||
</li><li class="- topic/li li" data-ofbid="d195760e330__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d195760e332__20250121171632">Logo 分区 size 默认 768K，打包后的 <span class="+ topic/ph sw-d/filepath ph filepath">logo.itb</span> 文件 size
|
||
需小于 logo 分区。</p>
|
||
<div class="- topic/p p" data-ofbid="d195760e338__20250121171632">以 spi-nand
|
||
启动为例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_azt_bl3_pzb__codeblock_hgy_ztr_c1c" data-ofbid="concept_azt_bl3_pzb__codeblock_hgy_ztr_c1c"><em class="hl-comment">// target/<IC>/<Board>/image_cfg.json</em>
|
||
<span class="hl-string">"spi-nand"</span>: {
|
||
<span class="hl-string">"size"</span>: <span class="hl-string">"128m"</span>, <em class="hl-comment">// Size of SPI NAND</em>
|
||
<span class="hl-string">"partitions"</span>: {
|
||
<span class="hl-string">"spl"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"1m"</span> },
|
||
<span class="hl-string">"uboot"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"1m"</span> },
|
||
<span class="hl-string">"userid"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"256k"</span> },
|
||
<span class="hl-string">"bbt"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"256k"</span> },
|
||
<span class="hl-string">"env"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"256k"</span> },
|
||
<span class="hl-string">"env_r"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"256k"</span> },
|
||
<span class="hl-string">"falcon"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"256k"</span> },
|
||
<span class="hl-string">"logo"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"768K"</span> }, <em class="hl-comment">// 默认配置 768K，需要大于 logo.itb 文件</em>
|
||
<span class="hl-string">"kernel"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"12m"</span> },
|
||
<span class="hl-string">"recovery"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"10m"</span> },
|
||
<span class="hl-string">"ubiroot"</span>: {
|
||
<span class="hl-string">"size"</span>: <span class="hl-string">"32m"</span>,
|
||
<span class="hl-string">"ubi"</span>: { <em class="hl-comment">// Volume in UBI device</em>
|
||
<span class="hl-string">"rootfs"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"-"</span> },
|
||
},
|
||
},
|
||
<span class="hl-string">"ubisystem"</span>: {
|
||
<span class="hl-string">"size"</span>: <span class="hl-string">"-"</span>,
|
||
<span class="hl-string">"ubi"</span>: { <em class="hl-comment">// Volume in UBI device</em>
|
||
<span class="hl-string">"user"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"-"</span> },
|
||
},
|
||
},
|
||
}
|
||
},</pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d195760e343__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d195760e345__20250121171632">ArtInChip 平台基于 ffmpeg 进行精简，提供一个专门的 png 转换工具，确保用作 logo 的 png
|
||
图片只包含一个 <span class="+ topic/keyword pr-d/parmname keyword parmname">IDAT</span> 数据块。</p>
|
||
<div class="- topic/note note note note_note" id="concept_azt_bl3_pzb__note_htf_xfh_bzb" data-ofbid="concept_azt_bl3_pzb__note_htf_xfh_bzb"><span class="note__title">注：</span>
|
||
<p class="- topic/p p" data-ofbid="d195760e353__20250121171632">当前暂不支持 32 位带 alpha 信息的 png 图片。</p>
|
||
</div>
|
||
</li><li class="- topic/li li" data-ofbid="d195760e357__20250121171632">
|
||
<div class="- topic/p p" data-ofbid="d195760e359__20250121171632">png 硬解码输出的格式默认为 ARGB8888, 如果想更换输出格式，需要修改 uboot
|
||
源码。源码以及支持的格式如下所示：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_azt_bl3_pzb__codeblock_agj_b5r_c1c" data-ofbid="concept_azt_bl3_pzb__codeblock_agj_b5r_c1c"><em class="hl-comment">// drivers/video/artinchip/decoder/aic_ve_png.c</em>
|
||
|
||
<em class="hl-comment">/* output type */</em>
|
||
#<span class="hl-directive">define</span> ARGB8888 <span class="hl-number">0</span>
|
||
#<span class="hl-directive">define</span> ABGR8888 <span class="hl-number">1</span>
|
||
#<span class="hl-directive">define</span> RGBA8888 <span class="hl-number">2</span>
|
||
#<span class="hl-directive">define</span> BGRA8888 <span class="hl-number">3</span>
|
||
#<span class="hl-directive">define</span> RGB888 <span class="hl-number">4</span>
|
||
#<span class="hl-directive">define</span> BGR888 <span class="hl-number">5</span>
|
||
|
||
#<span class="hl-directive">define</span> OUTPUT_FORMAT ARGB8888</pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d195760e364__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d195760e366__20250121171632">更换 logo 图片，需要注意以下几点：</p>
|
||
<ol class="- topic/ol ol" id="concept_azt_bl3_pzb__ol_t22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__ol_t22_rfh_bzb"><li class="- topic/li li" data-ofbid="d195760e370__20250121171632">用作 logo 的 png 图片必须只包含一个 IDAT 数据块</li><li class="- topic/li li" data-ofbid="d195760e372__20250121171632">Png 图片的宽高不能大于当前 LCD panel 的宽高</li><li class="- topic/li li" data-ofbid="d195760e374__20250121171632"><span class="+ topic/ph sw-d/filepath ph filepath">image_cfg.json</span> 文件中 logo 分区 size（默认
|
||
768K）需要大于 <span class="+ topic/ph sw-d/filepath ph filepath">logo.itb</span> 文件</li></ol>
|
||
</li></ul>
|
||
</li><li class="- topic/li li" data-ofbid="d195760e383__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d195760e385__20250121171632"><strong class="+ topic/ph hi-d/b ph b">JPG LOGO</strong></p>
|
||
<ul class="- topic/ul ul" data-ofbid="d195760e389__20250121171632"><li class="- topic/li li" data-ofbid="d195760e390__20250121171632">
|
||
<div class="- topic/p p" data-ofbid="d195760e392__20250121171632">更换 jpg 格式的 logo 图片，將图片存放于
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">target/<var class="+ topic/keyword sw-d/varname keyword varname">IC</var>/<var class="+ topic/keyword sw-d/varname keyword varname">Board</var>/logo/boot_logo.jpg</span>。<div class="- topic/note note note note_note" id="concept_azt_bl3_pzb__note_okn_xfh_bzb" data-ofbid="concept_azt_bl3_pzb__note_okn_xfh_bzb"><span class="note__title">注：</span> 图片必须命名为
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">boot_logo.jpg</span>。</div></div>
|
||
</li><li class="- topic/li li" data-ofbid="d195760e409__20250121171632">
|
||
<div class="- topic/p p" data-ofbid="d195760e411__20250121171632">更换 jpg logo 图片，需要注意以下几点：<ol class="- topic/ol ol" id="concept_azt_bl3_pzb__ol_w22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__ol_w22_rfh_bzb"><li class="- topic/li li" data-ofbid="d195760e414__20250121171632"><span class="+ topic/ph sw-d/filepath ph filepath">jpg</span> 图片的宽高不能大于当前 LCD panel 的宽高。</li><li class="- topic/li li" data-ofbid="d195760e418__20250121171632">修改 <span class="+ topic/ph sw-d/filepath ph filepath">logo.its</span> 文件， 将
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">boot_logo.jpg</span> 打包进
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">logo.its</span> 文件。</li><li class="- topic/li li" data-ofbid="d195760e429__20250121171632"><span class="+ topic/ph sw-d/filepath ph filepath">image_cfg.json</span> 文件中 logo 分区 size （默认
|
||
768K）需要大于 <span class="+ topic/ph sw-d/filepath ph filepath">logo.its</span> 文件。</li></ol></div>
|
||
<div class="- topic/p p" data-ofbid="d195760e437__20250121171632"><span class="+ topic/ph sw-d/filepath ph filepath">logo.its </span>文件修改，以 spi-nand
|
||
启动为例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_azt_bl3_pzb__codeblock_bfz_d5r_c1c" data-ofbid="concept_azt_bl3_pzb__codeblock_bfz_d5r_c1c"><em class="hl-comment">// target/<IC>/<Board>/logo.its 板级配置，如果存在，优先修改</em>
|
||
<em class="hl-comment">// target/<IC>/common/logo.its 默认配置</em>
|
||
|
||
/dts-v1/;
|
||
|
||
/ {
|
||
description = <span class="hl-string">"ArtInChip LOGO"</span>;
|
||
#address-cells = <<span class="hl-number">1</span>>;
|
||
|
||
images {
|
||
boot {
|
||
description = <span class="hl-string">"ArtInChip boot logo"</span>;
|
||
type = <span class="hl-string">"multi"</span>;
|
||
compression = <span class="hl-string">"none"</span>;
|
||
data = /incbin/(<span class="hl-string">"logo/boot_logo.jpg"</span>); <em class="hl-comment">// 修改为 jpg 图片</em>
|
||
};
|
||
|
||
usbburn {
|
||
description = <span class="hl-string">"USB burn logo"</span>;
|
||
type = <span class="hl-string">"multi"</span>;
|
||
compression = <span class="hl-string">"none"</span>;
|
||
data = /incbin/(<span class="hl-string">"logo/usb_burn.png"</span>);
|
||
};
|
||
|
||
udiskburn {
|
||
description = <span class="hl-string">"udisk burn logo"</span>;
|
||
type = <span class="hl-string">"multi"</span>;
|
||
compression = <span class="hl-string">"none"</span>;
|
||
data = /incbin/(<span class="hl-string">"logo/udisk_burn.png"</span>);
|
||
};
|
||
|
||
sdburn {
|
||
description = <span class="hl-string">"SDCard burn logo"</span>;
|
||
type = <span class="hl-string">"multi"</span>;
|
||
compression = <span class="hl-string">"none"</span>;
|
||
data = /incbin/(<span class="hl-string">"logo/sd_burn.png"</span>);
|
||
};
|
||
|
||
burn_done {
|
||
description = <span class="hl-string">"burn done logo"</span>;
|
||
type = <span class="hl-string">"multi"</span>;
|
||
compression = <span class="hl-string">"none"</span>;
|
||
data = /incbin/(<span class="hl-string">"logo/burn_done.png"</span>);
|
||
};
|
||
};
|
||
|
||
configurations {
|
||
<strong class="hl-keyword">default</strong> = <span class="hl-string">"conf-1"</span>;
|
||
|
||
conf-<span class="hl-number">1</span> {
|
||
description = <span class="hl-string">"ArtInChip logo image"</span>;
|
||
};
|
||
};
|
||
};</pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d195760e444__20250121171632">
|
||
<div class="- topic/p p" data-ofbid="d195760e446__20250121171632">jpeg 硬解码输出的是 YUV 数据, 需要 GE 进行一次数据格式转换，GE 默认转换的格式为 ARGB8888。
|
||
如果想修改转换格式，需要修改 uboot
|
||
源码。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_azt_bl3_pzb__codeblock_vmk_25r_c1c" data-ofbid="concept_azt_bl3_pzb__codeblock_vmk_25r_c1c"><em class="hl-comment">// drivers/video/artinchip/decoder/aic_ve_jpeg.c</em>
|
||
|
||
<em class="hl-comment">/* GE output format */</em>
|
||
#<span class="hl-directive">define</span> CONVER_FORMAT MPP_FMT_ARGB_<span class="hl-number">8888</span>
|
||
|
||
<em class="hl-comment">// include/artinchip/mpp_types.h</em>
|
||
<span class="hl-number">3.14</span>.<span class="hl-number">9.</span> falcon 模式 logo¶</pre></div>
|
||
</li></ul>
|
||
</li></ul></div>
|
||
</section><section class="- topic/section section" id="concept_azt_bl3_pzb__section_z22_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_z22_rfh_bzb"><h2 class="- topic/title title sectiontitle">Falcon 模式 logo</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d195760e458__20250121171632">ArtInChip 平台支持在 falcon 启动时显示 logo。</p>
|
||
<div class="- topic/note note note note_note" id="concept_azt_bl3_pzb__note_hjz_xfh_bzb" data-ofbid="concept_azt_bl3_pzb__note_hjz_xfh_bzb"><span class="note__title">注：</span>
|
||
<p class="- topic/p p" data-ofbid="d195760e463__20250121171632">目前仅支持 SPI NAND Falcon 启动显示 logo，且只能显示 <span class="+ topic/ph sw-d/filepath ph filepath">png</span> 格式的 logo。</p>
|
||
</div>
|
||
</section><section class="- topic/section section" id="concept_azt_bl3_pzb__section_af2_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__section_af2_rfh_bzb"><h2 class="- topic/title title sectiontitle">FAQ</h2>
|
||
|
||
<ul class="- topic/ul ul" id="concept_azt_bl3_pzb__ul_bf2_rfh_bzb" data-ofbid="concept_azt_bl3_pzb__ul_bf2_rfh_bzb"><li class="- topic/li li" data-ofbid="d195760e477__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d195760e479__20250121171632">新屏支持</p>
|
||
</li></ul>
|
||
<p class="- topic/p p" data-ofbid="d195760e483__20250121171632">参考 SDK
|
||
指南中的显示模块使用指南，两者思路相同。</p>
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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="#concept_azt_bl3_pzb__section_mrf_sfh_bzb" data-tocid="concept_azt_bl3_pzb__section_mrf_sfh_bzb">相关术语</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_azt_bl3_pzb__section_zd2_rfh_bzb" data-tocid="concept_azt_bl3_pzb__section_zd2_rfh_bzb">驱动框架</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_azt_bl3_pzb__section_c22_rfh_bzb" data-tocid="concept_azt_bl3_pzb__section_c22_rfh_bzb">预留内存</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_azt_bl3_pzb__section_f22_rfh_bzb" data-tocid="concept_azt_bl3_pzb__section_f22_rfh_bzb">初始化流程</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_azt_bl3_pzb__section_h22_rfh_bzb" data-tocid="concept_azt_bl3_pzb__section_h22_rfh_bzb">LOGO 加载</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_azt_bl3_pzb__section_j22_rfh_bzb" data-tocid="concept_azt_bl3_pzb__section_j22_rfh_bzb">硬件时序要求</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_azt_bl3_pzb__section_m22_rfh_bzb" data-tocid="concept_azt_bl3_pzb__section_m22_rfh_bzb">LOGO 保持</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_azt_bl3_pzb__section_o22_rfh_bzb" data-tocid="concept_azt_bl3_pzb__section_o22_rfh_bzb">更换 LOGO</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_azt_bl3_pzb__section_z22_rfh_bzb" data-tocid="concept_azt_bl3_pzb__section_z22_rfh_bzb">Falcon 模式 logo</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_azt_bl3_pzb__section_af2_rfh_bzb" data-tocid="concept_azt_bl3_pzb__section_af2_rfh_bzb">FAQ</a></div></li></ul></div>
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