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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" 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/mdi/mdi_design.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1><div class="date inPage">5 Dec 2024</div><div style="color: gray;">
Read time: 12 minute(s)
</div><div class="- topic/body body"><section class="- topic/section section" id="id__section_i3c_ldy_2dc" data-ofbid="id__section_i3c_ldy_2dc"><strong class="+ topic/ph hi-d/b ph b">源码说明</strong><div class="- topic/div div">
<div class="- topic/div div section" id="id__id2">
<p class="- topic/p p" data-ofbid="d264557e24__20250121171732">源代码位于 <span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/</span>：</p>
<ul class="- topic/ul ul simple" id="id__ul_j3c_ldy_2dc" data-ofbid="id__ul_j3c_ldy_2dc"><li class="- topic/li li" data-ofbid="d264557e31__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e33__20250121171732"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/drv/mdi/drv_mdi.c</span>，MDI Driver
层实现</p>
</li><li class="- topic/li li" data-ofbid="d264557e38__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e40__20250121171732"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/hal/mdi/hal_mdi.c</span>，MDI HAL 层实现</p>
</li><li class="- topic/li li" data-ofbid="d264557e45__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e47__20250121171732"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/hal/hal_mdi.h</span>，MDI HAL
层接口头文件</p>
</li></ul>
</div>
</div></section><section class="- topic/section section" id="id__section_shh_mdy_2dc" data-ofbid="id__section_shh_mdy_2dc"><h2 class="- topic/title title sectiontitle">模块架构</h2>
<div class="- topic/div div">
<div class="- topic/div div section" id="id__id3">
<p class="- topic/p p" data-ofbid="d264557e63__20250121171732">整个软件系统的架构图如下：</p>
<figure class="- topic/fig fig fignone" id="id__fig_k3c_ldy_2dc" data-ofbid="id__fig_k3c_ldy_2dc"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_l3c_ldy_2dc" src="../../../images/mdi/sw_system11.png" alt="sw_system11"/></div><br/></figure>
<ul class="- topic/ul ul simple" id="id__ul_m3c_ldy_2dc" data-ofbid="id__ul_m3c_ldy_2dc"><li class="- topic/li li" data-ofbid="d264557e74__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e76__20250121171732">MDI
驱动需要和
ArtInChip 自制的 MPP
中间件配合使用，MDI
Driver 层采用普通的 API
方式向上提供接口。</p>
</li><li class="- topic/li li" data-ofbid="d264557e79__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e81__20250121171732">MPP VIN 模块对 APP 提供类似 ioctl 的接口封装，类似 Linux 中的 ioctl
接口定义。</p>
</li><li class="- topic/li li" data-ofbid="d264557e84__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e86__20250121171732">MDI
需要用到多任务并发，暂不支持在裸机环境中运行。</p>
</li></ul>
</div>
</div>
</section></div><article class="- topic/topic topic nested1" aria-labelledby="ariaid-title2" xml:lang="zh-CN" lang="zh-CN" id="topic_oxx_53y_2dc"><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/mdi/mdi_design.dita">Edit online</a></span><h2 class="- topic/title title topictitle2" id="ariaid-title2">关键流程设计</h2><div class="- topic/body body"><section class="- topic/section section" id="topic_oxx_53y_2dc__section_ayb_ndy_2dc" data-ofbid="topic_oxx_53y_2dc__section_ayb_ndy_2dc"><h3 class="- topic/title title sectiontitle">初始化流程</h3>
<p class="- topic/p p" data-ofbid="d264557e101__20250121171732">总体上看，MDI 驱动的初始化过程实现在 aic_mdi_open() 接口中，完成的操作有：</p><ol class="- topic/ol ol arabic simple" id="topic_oxx_53y_2dc__ol_n3c_ldy_2dc" data-ofbid="topic_oxx_53y_2dc__ol_n3c_ldy_2dc"><li class="- topic/li li" data-ofbid="d264557e104__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e106__20250121171732">使能 MDI 时钟</p>
</li><li class="- topic/li li" data-ofbid="d264557e109__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e111__20250121171732">打卡 MDI 中断</p>
</li><li class="- topic/li li" data-ofbid="d264557e114__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e116__20250121171732">初始化 VideoBuf 链表</p>
</li><li class="- topic/li li" data-ofbid="d264557e119__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e121__20250121171732">使能 DVP 控制器</p>
</li></ol></section><section class="- topic/section section" id="topic_oxx_53y_2dc__buffer" data-ofbid="topic_oxx_53y_2dc__buffer"><h3 class="- topic/title title sectiontitle">Buffer 队列管理</h3>
<p class="- topic/p p" data-ofbid="d264557e129__20250121171732">Buffer 队列管理复用 MPP VIN Buffer 模块中的机制，通过三个链表来管理这些 Buffer。</p><div class="- topic/div div section" id="topic_oxx_53y_2dc__mdi-de-buffer">
<strong class="+ topic/ph hi-d/b ph b">MDI-&gt;DE 场景的 Buffer 管理</strong>
<p class="- topic/p p" data-ofbid="d264557e136__20250121171732">整个 Buffer 流转的过程如下图：</p><figure class="- topic/fig fig fignone" id="topic_oxx_53y_2dc__id10" data-ofbid="topic_oxx_53y_2dc__id10"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="topic_oxx_53y_2dc__image_o3c_ldy_2dc" src="../../../images/mdi/mdi_de_buf_flow.png" alt="mdi_de_buf_flow"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">MDI-&gt;DE 场景中的 Buffer 流转过程</span></figcaption></figure></div><div class="- topic/div div section" id="topic_oxx_53y_2dc__mdi-ge-de-buffer">
<strong class="+ topic/ph hi-d/b ph b">MDI-&gt;GE-&gt;DE 场景的 Buffer 管理</strong>
<p class="- topic/p p" data-ofbid="d264557e149__20250121171732">整个 Buffer 流转的过程如下图：</p><figure class="- topic/fig fig fignone" id="topic_oxx_53y_2dc__id11" data-ofbid="topic_oxx_53y_2dc__id11"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="topic_oxx_53y_2dc__image_p3c_ldy_2dc" src="../../../images/mdi/mdi_ge_de_buf_flow.png" alt="mdi_ge_de_buf_flow"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 2</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">MDI-&gt;GE-&gt;DE 场景中的 Buffer 流转过程</span></figcaption></figure></div><div class="- topic/div div section" id="topic_oxx_53y_2dc__id6">
<strong class="+ topic/ph hi-d/b ph b"> 局部刷新场景中的 Buffer 管理</strong>
<p class="- topic/p p" data-ofbid="d264557e162__20250121171732">在局部刷新场景中，为了节省带宽，通常采用以下流程：</p><ul class="- topic/ul ul simple" id="topic_oxx_53y_2dc__ul_qsl_jdy_2dc" data-ofbid="topic_oxx_53y_2dc__ul_qsl_jdy_2dc"><li class="- topic/li li" data-ofbid="d264557e165__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e167__20250121171732">先推一屏完整的数据。</p>
</li><li class="- topic/li li" data-ofbid="d264557e170__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e172__20250121171732">后面帧都采用局部刷新方式，只推一个小图，位置信息由
2A、2B 命令提供。</p>
</li><li class="- topic/li li" data-ofbid="d264557e175__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e177__20250121171732">将小图数据填充到空的 Buffer 中，并将这个 Buffer 提交给 GE 模块进行处理。</p>
<p class="- topic/p p" data-ofbid="d264557e180__20250121171732">GE 做数据搬运和局部填充。</p>
</li><li class="- topic/li li" data-ofbid="d264557e183__20250121171732">
<p class="- topic/p p" data-ofbid="d264557e185__20250121171732">将处理后的 Buffer 提交给 DE 模块进行显示。</p>
</li></ul><div class="- topic/p p" data-ofbid="d264557e188__20250121171732">数据通路： MDI
→ GE
→
DE。<div class="- topic/note note note note_note" id="topic_oxx_53y_2dc__note_fbw_j4y_2dc" data-ofbid="topic_oxx_53y_2dc__note_fbw_j4y_2dc"><span class="note__title">注：</span> 运行时需要一直保持一个背景图的备份</div></div><figure class="- topic/fig fig fignone" id="topic_oxx_53y_2dc__id12" data-ofbid="topic_oxx_53y_2dc__id12"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="topic_oxx_53y_2dc__image_q3c_ldy_2dc" src="../../../images/mdi/mdi_part_refresh_flow.png" alt="mdi_part_refresh_flow"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 3</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">MDI
→ GE → DE 局部刷新场景中的 Buffer 流转过程</span></figcaption></figure>
</div></section><section class="- topic/section section" id="topic_oxx_53y_2dc__id7" data-ofbid="topic_oxx_53y_2dc__id7"><h3 class="- topic/title title sectiontitle">中断处理流程</h3>
<p class="- topic/p p" data-ofbid="d264557e204__20250121171732">MDI 的中断处理中需要处理
Buf
队列的流转和
Display
Buffer Interface
(DBI)
命令响应。</p>
<div class="- topic/p p" data-ofbid="d264557e207__20250121171732">对于图像数据的接收，MDI
硬件提供以下关键的中断状态：<div class="- topic/note note note note_note" id="topic_oxx_53y_2dc__note_hhd_w4t_2dc" data-ofbid="topic_oxx_53y_2dc__note_hhd_w4t_2dc"><span class="note__title">注：</span> <span class="+ topic/ph ui-d/uicontrol ph uicontrol">HNUM Interrupt</span> 会先于
<span class="+ topic/ph ui-d/uicontrol ph uicontrol">Frame done</span> 发生。</div></div>
<ol class="- topic/ol ol arabic simple" id="topic_oxx_53y_2dc__ol_r3c_ldy_2dc" data-ofbid="topic_oxx_53y_2dc__ol_r3c_ldy_2dc"><li class="- topic/li li" data-ofbid="d264557e218__20250121171732">
<dl class="- topic/dl dl simple" id="topic_oxx_53y_2dc__dl_s3c_ldy_2dc" data-ofbid="topic_oxx_53y_2dc__dl_s3c_ldy_2dc"><dt class="- topic/dt dt dlterm" data-ofbid="d264557e222__20250121171732">HNUM Interrupt</dt><dd class="- topic/dd dd">
<p class="- topic/p p" data-ofbid="d264557e226__20250121171732">用于判断当前
Register 是否可以修改。出现 <span class="+ topic/ph ui-d/uicontrol ph uicontrol">HNUM
Interrupt</span>，表示当前图像帧已经完成 10
行（驱动中默认配置）数据的刷新，硬件已经读走了当前的
Register 值（影子寄存器），软件可以传入下一个 Buf 的参数了。</p>
</dd></dl>
</li><li class="- topic/li li" data-ofbid="d264557e233__20250121171732">
<dl class="- topic/dl dl simple" id="topic_oxx_53y_2dc__dl_t3c_ldy_2dc" data-ofbid="topic_oxx_53y_2dc__dl_t3c_ldy_2dc"><dt class="- topic/dt dt dlterm" data-ofbid="d264557e237__20250121171732">Frame done</dt><dd class="- topic/dd dd">
<p class="- topic/p p" data-ofbid="d264557e241__20250121171732">用于判断当前
buf 是否完成（done 状态）。出现 <span class="+ topic/ph ui-d/uicontrol ph uicontrol">Frame
done</span>，表示当前帧的数据传输完成，此时该
buf 可以从 QBuf list 切换到 DQbuf list。</p>
</dd></dl>
</li></ol>
<p class="- topic/p p" data-ofbid="d264557e249__20250121171732">按照 MDI 硬件设计的逻辑，<span class="+ topic/ph ui-d/uicontrol ph uicontrol">HNUM Interrupt</span> 和 <span class="+ topic/ph ui-d/uicontrol ph uicontrol">Frame
done</span> 会间隔产生，如下所示：</p>
<p class="- topic/p p" data-ofbid="d264557e259__20250121171732">
<code class="+ topic/ph pr-d/codeph ph codeph">HNUM Interrupt -&gt; Frame done-&gt; HNUM Interrupt -&gt; Frame
done-&gt; HNUM Interrupt -&gt; Frame done...</code>
</p>
<figure class="- topic/fig fig fignone" id="topic_oxx_53y_2dc__id13" data-ofbid="topic_oxx_53y_2dc__id13"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="topic_oxx_53y_2dc__image_u3c_ldy_2dc" src="../../../images/mdi/mdi_irq_flow.png" alt="mdi_irq_flow"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 4</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">MDI
驱动中 IRQ 处理流程</span></figcaption></figure>
</section></div></article><article class="- topic/topic topic nested1" aria-labelledby="ariaid-title3" xml:lang="zh-CN" lang="zh-CN" id="topic_zfs_bjy_2dc"><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/mdi/mdi_design.dita">Edit online</a></span><h2 class="- topic/title title topictitle2" id="ariaid-title3">自定义 DBI 命令设计</h2><div class="- topic/body body section" id="topic_zfs_bjy_2dc__dbi"><p class="- topic/p p" data-ofbid="d264557e276__20250121171732">Display Buffer Interface (DBI) 命令是用于控制显示设备（如液晶显示屏）的一组指令。这些命令通常由主控芯片 (MCU)
发送给显示控制器，以配置和控制显示参数。以下是一些常见的 DBI 命令及其功能：</p><section class="- topic/section section" id="topic_zfs_bjy_2dc__section_wnk_lqy_2dc" data-ofbid="topic_zfs_bjy_2dc__section_wnk_lqy_2dc"><h3 class="- topic/title title sectiontitle">0x3A：Interface Pixel Format</h3>
<p class="- topic/p p" data-ofbid="d264557e283__20250121171732">0x3A 命令是一个标准的 DBI 命令，用于设置显示接口的像素格式。 </p>
<figure class="- topic/fig fig fignone" id="topic_zfs_bjy_2dc__id14" data-ofbid="topic_zfs_bjy_2dc__id14"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="topic_zfs_bjy_2dc__image_v3c_ldy_2dc" src="../../../images/mdi/dbi_cmd_3a.png" alt="dbi_cmd_3a"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 5</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">0x3A 命令的原始定义</span></figcaption></figure>
<p class="- topic/p p" data-ofbid="d264557e293__20250121171732">为了区分一些特殊格式，对 BIT3 新增了扩展定义。通过修改 BIT3，可以定义不同的颜色格式。</p>
<div class="- topic/p p" data-ofbid="d264557e296__20250121171732">针对 BIT3
的自定义如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_zfs_bjy_2dc__codeblock_k41_vdy_2dc" data-ofbid="topic_zfs_bjy_2dc__codeblock_k41_vdy_2dc"><em class="hl-comment">/* The flag is a extend bit of CMD 0x3A, which should be set by Host.
*
* Bus Mode MCU Interface Flag RGB sequence
* ------------ ------------- ---- --------------
* SPI 16BIT x RGB565
* SPI 24BIT 0 RGB888
* SPI 24BIT 1 RGB888_2
* 8080/6080 x8 16BIT x X8 RGB565
* 8080/6080 x8 24BIT x X8 RGB888
* 8080/6080 x16 16BIT x X16 RGB565
* 8080/6080 x16 18BIT 0 X16 RGBX666
* 8080/6080 x16 18BIT 1 X16 XRGB666
* 8080/6080 x16 24BIT 0 X16 RGBX888
* 8080/6080 x16 24BIT 1 X16 RGBX
*/</em></pre><div class="- topic/note note note note_note" id="topic_zfs_bjy_2dc__note_cts_2qy_2dc" data-ofbid="topic_zfs_bjy_2dc__note_cts_2qy_2dc"><span class="note__title">注：</span> 对应其中的 Flag 定义，代码详见
<span class="+ topic/ph sw-d/filepath ph filepath">drv_mdi.c</span> 的接口
<span class="+ topic/keyword pr-d/apiname keyword apiname">aic_mdi_in_fmt_set()</span>）</div></div>
</section><section class="- topic/section section" id="topic_zfs_bjy_2dc__section_h5m_4qy_2dc" data-ofbid="topic_zfs_bjy_2dc__section_h5m_4qy_2dc"><h3 class="- topic/title title sectiontitle">0xAC：GE Control</h3>
<div class="- topic/div div section" id="topic_zfs_bjy_2dc__ge-control-0xac">
0xAC
命令用于配置图形引擎（GE）的控制参数，包括拉伸、镜像和旋转等操作。<div class="- topic/p p" data-ofbid="d264557e316__20250121171732">0xAC
命令定义如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_zfs_bjy_2dc__codeblock_x5l_vdy_2dc" data-ofbid="topic_zfs_bjy_2dc__codeblock_x5l_vdy_2dc">#<span class="hl-directive">define</span> DBI_CMD_GE_H_FLIP BIT(<span class="hl-number">6</span>)
#<span class="hl-directive">define</span> DBI_CMD_GE_V_FLIP BIT(<span class="hl-number">5</span>)
#<span class="hl-directive">define</span> DBI_CMD_GE_SCALE BIT(<span class="hl-number">4</span>)
#<span class="hl-directive">define</span> DBI_CMD_GE_ROT_MASK GENMASK(<span class="hl-number">1</span>, <span class="hl-number">0</span>)</pre>
</div><div class="- topic/p p" data-ofbid="d264557e321__20250121171732">Rotation
的角度定义，复用 MPP
中的定义：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_zfs_bjy_2dc__codeblock_ycq_vdy_2dc" data-ofbid="topic_zfs_bjy_2dc__codeblock_ycq_vdy_2dc"><em class="hl-comment">/* rotate flags for GE/VE ctrl */</em>
#<span class="hl-directive">define</span> MPP_ROTATION_<span class="hl-number">0</span> (<span class="hl-number">0</span> &lt;&lt; <span class="hl-number">0</span>)
#<span class="hl-directive">define</span> MPP_ROTATION_<span class="hl-number">90</span> (<span class="hl-number">1</span> &lt;&lt; <span class="hl-number">0</span>)
#<span class="hl-directive">define</span> MPP_ROTATION_<span class="hl-number">180</span> (<span class="hl-number">2</span> &lt;&lt; <span class="hl-number">0</span>)
#<span class="hl-directive">define</span> MPP_ROTATION_<span class="hl-number">270</span> (<span class="hl-number">3</span> &lt;&lt; <span class="hl-number">0</span>)</pre></div></div>
</section></div></article><article class="- topic/topic topic nested1" aria-labelledby="ariaid-title4" xml:lang="zh-CN" lang="zh-CN" id="topic_udm_2jy_2dc"><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/mdi/mdi_design.dita">Edit online</a></span><h2 class="- topic/title title topictitle2" id="ariaid-title4">数据结构设计</h2><div class="- topic/body body"><section class="- topic/section section" id="topic_udm_2jy_2dc__id8" data-ofbid="topic_udm_2jy_2dc__id8"><h3 class="- topic/title title sectiontitle">struct aic_mdi_cfg</h3>
<div class="- topic/p p" data-ofbid="d264557e335__20250121171732">属于 MPP VIN Dev 层的接口，定义了输入信号、显示输出的配置信息，由 APP
层在初始化时传入，包含以下字段：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_udm_2jy_2dc__codeblock_sfz_vdy_2dc" data-ofbid="topic_udm_2jy_2dc__codeblock_sfz_vdy_2dc"><strong class="hl-keyword">struct</strong> aic_mdi_cfg {
<em class="hl-comment">/* Input format, should be decided by some GPIO */</em>
<strong class="hl-keyword">enum</strong> mdi_bus_mode bus_mode;
<strong class="hl-keyword">enum</strong> mdi_dat_endian big_endian;
<strong class="hl-keyword">struct</strong> mdi_bus_<span class="hl-number">8080</span>_cfg bus_<span class="hl-number">8080</span>;
<strong class="hl-keyword">struct</strong> mdi_bus_spi_cfg bus_spi;
<em class="hl-comment">/* Input pixel format, set by Host write command */</em>
u32 width;
u32 height;
<em class="hl-comment">/* Output pixel format, depends on the panel */</em>
u32 stride;
u32 sizeimage;
};</pre></div>
<div class="- topic/p p" data-ofbid="d264557e342__20250121171732">其中，引用到了关于 DBI
BUS
的配置信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_udm_2jy_2dc__codeblock_n3b_c2y_2dc" data-ofbid="topic_udm_2jy_2dc__codeblock_n3b_c2y_2dc"><em class="hl-comment">/* Information of SPI bus */</em>
<strong class="hl-keyword">struct</strong> mdi_bus_spi_cfg {
<strong class="hl-keyword">enum</strong> mdi_spi_mode mode;
<strong class="hl-keyword">enum</strong> mdi_spi_disp_fmt seq;
<strong class="hl-keyword">enum</strong> mdi_spi_rd_fmt rd_fmt;
};
<em class="hl-comment">/* Information of 8080/6800 bus */</em>
<strong class="hl-keyword">struct</strong> mdi_bus_<span class="hl-number">8080</span>_cfg {
<strong class="hl-keyword">enum</strong> mdi_pin_ctl pin;
<strong class="hl-keyword">union</strong> {
<strong class="hl-keyword">enum</strong> mdi_x8_seq x8;
<strong class="hl-keyword">enum</strong> mdi_x16_seq x16;
} seq;
};</pre></div>
</section><section class="- topic/section section" id="topic_udm_2jy_2dc__dbi-bus" data-ofbid="topic_udm_2jy_2dc__dbi-bus"><h3 class="- topic/title title sectiontitle">DBI Bus 的格式定义</h3>
<div class="- topic/p p" data-ofbid="d264557e353__20250121171732">属于 MPP VIN Dev 层的接口，定义了 DBI
BUS
相关的数据格式：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_udm_2jy_2dc__codeblock_dbx_d2y_2dc" data-ofbid="topic_udm_2jy_2dc__codeblock_dbx_d2y_2dc"><strong class="hl-keyword">enum</strong> mdi_bus_mode {
MDI_BUS_MODE_<span class="hl-number">8080</span> = <span class="hl-number">0</span>,
MDI_BUS_MODE_<span class="hl-number">6800</span> = <span class="hl-number">1</span>,
MDI_BUS_MODE_SPI = <span class="hl-number">2</span>
};
<strong class="hl-keyword">enum</strong> mdi_spi_disp_fmt {
MDI_SPI_DISP_FMT_RGB888 = <span class="hl-number">0</span>,
MDI_SPI_DISP_FMT_RGB565 = <span class="hl-number">1</span>,
MDI_SPI_DISP_FMT_RGB888_<span class="hl-number">2</span> = <span class="hl-number">2</span>, <em class="hl-comment">// only for 2SDA</em>
};
<strong class="hl-keyword">enum</strong> mdi_spi_rd_fmt {
MDI_SPI_RD_FMT_<span class="hl-number">8</span>BIT = <span class="hl-number">0</span>,
MDI_SPI_RD_FMT_<span class="hl-number">24</span>BIT = <span class="hl-number">1</span>,
MDI_SPI_RD_FMT_<span class="hl-number">32</span>BIT = <span class="hl-number">2</span>
};
<strong class="hl-keyword">enum</strong> mdi_spi_mode {
MDI_SPI_MODE_<span class="hl-number">3</span>WIRE = <span class="hl-number">0</span>,
MDI_SPI_MODE_<span class="hl-number">4</span>WIRE = <span class="hl-number">1</span>,
MDI_SPI_MODE_<span class="hl-number">2</span>SDA = <span class="hl-number">2</span>,
MDI_SPI_MODE_<span class="hl-number">4</span>SDA = <span class="hl-number">3</span>
};
<strong class="hl-keyword">enum</strong> mdi_x16_seq {
MDI_X16_SEQ_RGB888 = <span class="hl-number">0</span>,
MDI_X16_SEQ_RGBX = <span class="hl-number">1</span>,
MDI_X16_SEQ_RGBX666 = <span class="hl-number">2</span>,
MDI_X16_SEQ_XRGB666 = <span class="hl-number">3</span>,
MDI_X16_SEQ_RGB565 = <span class="hl-number">4</span>
};
<strong class="hl-keyword">enum</strong> mdi_x8_seq {
MDI_X8_SEQ_RGB888 = <span class="hl-number">0</span>,
MDI_X8_SEQ_RGB565 = <span class="hl-number">1</span>
};
<strong class="hl-keyword">enum</strong> mdi_dat_endian {
MDI_DAT_ENDIAN_LOW_<span class="hl-number">8</span> = <span class="hl-number">0</span>,
MDI_DAT_ENDIAN_HIGH_<span class="hl-number">8</span> = <span class="hl-number">1</span>
};
<strong class="hl-keyword">enum</strong> mdi_pin_ctl {
MDI_PIN_CTL_X8 = <span class="hl-number">0</span>,
MDI_PIN_CTL_X16 = <span class="hl-number">1</span>
};</pre></div></section><section class="- topic/section section" id="topic_udm_2jy_2dc__id9" data-ofbid="topic_udm_2jy_2dc__id9"><h3 class="- topic/title title sectiontitle">DBI 命令的回调信息</h3>
<div class="- topic/div div">
<div class="- topic/p p" data-ofbid="d264557e364__20250121171732">属于 MPP VIN Dev 层的接口，定义了一个 DBI
命令对应的数据内容及处理函数：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_udm_2jy_2dc__codeblock_nvn_22y_2dc" data-ofbid="topic_udm_2jy_2dc__codeblock_nvn_22y_2dc"><strong class="hl-keyword">struct</strong> aic_dbi_cmd {
u8 code;
u8 data_len;
<strong class="hl-keyword">char</strong> name[<span class="hl-number">16</span>];
<strong class="hl-keyword">int</strong> (*proc)(u8 code, u8 *data);
};</pre></div>
</div>
</section><section class="- topic/section section" id="topic_udm_2jy_2dc__section_spl_1ry_2dc" data-ofbid="topic_udm_2jy_2dc__section_spl_1ry_2dc"><h3 class="- topic/title title sectiontitle">struct aic_mdi</h3>
<div class="- topic/p p" data-ofbid="d264557e375__20250121171732">属于 Driver 层内部接口，定义了 MDI 控制器的设备管理信息：
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_udm_2jy_2dc__codeblock_tt2_wdy_2dc" data-ofbid="topic_udm_2jy_2dc__codeblock_tt2_wdy_2dc"><strong class="hl-keyword">struct</strong> aic_mdi {
<strong class="hl-keyword">enum</strong> aic_mdi_status status;
<strong class="hl-keyword">struct</strong> aic_mdi_cfg cfg; <em class="hl-comment">/* The configuration of MDI HW */</em>
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">int</strong> busy_pin_g;
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">int</strong> busy_pin_p;
bdi_cmd_cb cmd_cb;
<em class="hl-comment">/* Videobuf */</em>
<strong class="hl-keyword">struct</strong> vb_queue queue;
<strong class="hl-keyword">struct</strong> list_head active_list;
aicos_mutex_t active_lock; <em class="hl-comment">/* lock of active buf list */</em>
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">int</strong> hw_used_cnt;
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">int</strong> sequence;
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">int</strong> streaming;
aicos_mutex_t lock;
};</pre></div>
</section></div></article><article class="- topic/topic topic nested1" aria-labelledby="ariaid-title5" xml:lang="zh-CN" lang="zh-CN" id="topic_alp_zjy_2dc"><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/mdi/mdi_design.dita">Edit online</a></span><h2 class="- topic/title title topictitle2" id="ariaid-title5">MPP VIN Dev 层接口设计</h2><div class="- topic/body body"><div class="table-container"><table class="- topic/table table frame-all" id="topic_alp_zjy_2dc__table_w3c_ldy_2dc" data-ofbid="topic_alp_zjy_2dc__table_w3c_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">mpp_vin_dev_init</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__2">int mpp_vin_dev_init(u32 cnt, struct aic_mdi_cfg
*cfg)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__2">完成 MDI VIN Dev 的状态初始化等</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">cnt - 指定接收多少帧图像，传 0 表示数量不限</div>
<div class="- topic/div div">cfg - 配置 DBI Bus 的格式信息，如 8080、X16/X8 等</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="topic_alp_zjy_2dc__table_w3c_ldy_2dc__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="topic_alp_zjy_2dc__table_x3c_ldy_2dc" data-ofbid="topic_alp_zjy_2dc__table_x3c_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">mpp_vin_dev_deinit</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__2">void mpp_vin_dev_deinit(void)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__2">MDI VIN Dev 的资源释放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="topic_alp_zjy_2dc__table_x3c_ldy_2dc__entry__2">- </td></tr></tbody></table></div></div></article><article class="- topic/topic topic nested1" aria-labelledby="ariaid-title6" xml:lang="zh-CN" lang="zh-CN" id="topic_vcy_qky_2dc"><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/mdi/mdi_design.dita">Edit online</a></span><h2 class="- topic/title title topictitle2" id="ariaid-title6">Driver 层接口设计</h2><div class="- topic/body body"><div class="table-container"><table class="- topic/table table frame-all" id="topic_vcy_qky_2dc__table_y3c_ldy_2dc" data-ofbid="topic_vcy_qky_2dc__table_y3c_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_mdi_open</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_vcy_qky_2dc__table_y3c_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_vcy_qky_2dc__table_y3c_ldy_2dc__entry__2">int aic_mdi_o
<div class="- topic/div div">
<div class="- topic/div div">cb - 当收到 DBI 命令时，处理 DBI 命令的回调函数</div>
<div class="- topic/div div">cfg - 配置 DBI Bus 的格式信息，如 8080、X16/X8 等</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_y3c_ldy_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_y3c_ldy_2dc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="topic_vcy_qky_2dc__table_y3c_ldy_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="topic_vcy_qky_2dc__table_y3c_ldy_2dc__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="topic_vcy_qky_2dc__table_z3c_ldy_2dc" data-ofbid="topic_vcy_qky_2dc__table_z3c_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 4</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_mdi_close</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__2">int aic_mdi_close(void)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__2">关闭时钟、关闭 MDI 控制器</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="topic_vcy_qky_2dc__table_z3c_ldy_2dc__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="topic_vcy_qky_2dc__table_ajc_ldy_2dc" data-ofbid="topic_vcy_qky_2dc__table_ajc_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 5</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_mdi_in_fmt_set</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_vcy_qky_2dc__table_ajc_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_vcy_qky_2dc__table_ajc_ldy_2dc__entry__2">int aic_mdi_in_fmt_set(enum dbi_mcu_if fmt, u8 flag)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_ajc_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_ajc_ldy_2dc__entry__2">设置 MDI 的输入视频格式</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_ajc_ldy_2dc__entry__1">参数<EFBFBD>
<div class="- topic/div div">
<div class="- topic/div div">fmt - MCU 接口的位宽格式</div>
<div class="- topic/div div">flag - 为了区分一些特殊格式，用此参数作为标记</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_ajc_ldy_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_ajc_ldy_2dc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="topic_vcy_qky_2dc__table_ajc_ldy_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="topic_vcy_qky_2dc__table_ajc_ldy_2dc__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="topic_vcy_qky_2dc__table_bjc_ldy_2dc" data-ofbid="topic_vcy_qky_2dc__table_bjc_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 6</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_mdi_out_pixel_set</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__2">void aic_mdi_out_pixel_set(u32 stride, u32 imagesize)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__2">设置 MDI 的输出图像格式</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">stride - 一行图像数据需要占用的字节个数</div>
<div class="- topic/div div">imagesize - 一帧图像数据需要占用的字节个数</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="topic_vcy_qky_2dc__table_bjc_ldy_2dc__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="topic_vcy_qky_2dc__table_cjc_ldy_2dc" data-ofbid="topic_vcy_qky_2dc__table_cjc_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 7</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_mdi_stream_on</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__2">int aic_mdi_stream_on(void)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__2">启动视频流</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="topic_vcy_qky_2dc__table_cjc_ldy_2dc__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="topic_vcy_qky_2dc__table_djc_ldy_2dc" data-ofbid="topic_vcy_qky_2dc__table_djc_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 8</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_mdi_stream_off</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_vcy_qky_2dc__table_djc_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_vcy_qky_2dc__table_djc_ldy_2dc__entry__2">int aic_mdi_stream_off(void)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_djc_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_djc_ldy_2dc__entry__2">关闭视频流</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_djc_ldy_2dc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vc
*vbuf)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_ejc_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_ejc_ldy_2dc__entry__2">按照给定的 Video Buf 配置信息从内存池中申请 Buf</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_ejc_ldy_2dc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_ejc_ldy_2dc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">buf - 指向内存池的指针</div>
<div class="- topic/div div">size - 内存池的总大小</div>
<div class="- topic/div div">vbuf - Video Buf 的配置信息</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_ejc_ldy_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_ejc_ldy_2dc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="topic_vcy_qky_2dc__table_ejc_ldy_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="topic_vcy_qky_2dc__table_ejc_ldy_2dc__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="topic_vcy_qky_2dc__table_fjc_ldy_2dc" data-ofbid="topic_vcy_qky_2dc__table_fjc_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 10</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_mdi_q_buf</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__2">int aic_mdi_q_buf(u32 index)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__2">释放指定 index 的 Buf 进入空闲队列（queued_list）</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__2">index - Buf 的索引号</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="topic_vcy_qky_2dc__table_fjc_ldy_2dc__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="topic_vcy_qky_2dc__table_gjc_ldy_2dc" data-ofbid="topic_vcy_qky_2dc__table_gjc_ldy_2dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 11</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_mdi_dq_buf</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="topic_vcy_qky_2dc__table_gjc_ldy_2dc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="topic_vcy_qky_2dc__table_gjc_ldy_2dc__entry__2">int aic_mdi_dq_buf(u32 *pindex)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="topic_vcy_qky_2dc__table_gjc_ldy_2dc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="topic_vcy_qky_2dc__table_gjc_ldy_2dc__entry__2">从 DVP 处理完成后的队列（done_list）中获取一个 Buf</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1"
<span class="+ topic/ph sw-d/filepath ph filepath">bsp/examples/test-mdi/test_mdi.c</span>：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_rxk_gry_2dc__codeblock_r5c_ydy_2dc" data-ofbid="topic_rxk_gry_2dc__codeblock_r5c_ydy_2dc"><strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">char</strong> sopts[] = <span class="hl-string">"c:h"</span>;
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> option lopts[] = {
{<span class="hl-string">"count"</span>, required_argument, NULL, <span class="hl-string">'c'</span>},
{<span class="hl-string">"help"</span>, no_argument, NULL, <span class="hl-string">'h'</span>},
{<span class="hl-number">0</span>, <span class="hl-number">0</span>, <span class="hl-number">0</span>, <span class="hl-number">0</span>}
};
<em class="hl-comment">/* Functions */</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">void</strong> usage(<strong class="hl-keyword">char</strong> *program)
{
printf(<span class="hl-string">"Compile time: %s %s\n"</span>, __DATE__, __TIME__);
printf(<span class="hl-string">"Usage: %s [options]: \n"</span>, program);
printf(<span class="hl-string">"\t -c, --count\t\tthe number of capture frame \n"</span>);
printf(<span class="hl-string">"\t -h, --help \n"</span>);
printf(<span class="hl-string">"\n"</span>);
printf(<span class="hl-string">"Example: %s -c 1\n"</span>, program);
}
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">long</strong> <strong class="hl-keyword">long</strong> <strong class="hl-keyword">int</strong> str2int(<strong class="hl-keyword">char</strong> *_str)
{
<strong class="hl-keyword">if</strong> (_str == NULL) {
pr_err(<span class="hl-string">"The string is empty!\n"</span>);
<strong class="hl-keyword">return</strong> -<span class="hl-number">1</span>;
}
<strong class="hl-keyword">if</strong> (strncmp(_str, <span class="hl-string">"0x"</span>, <span class="hl-number">2</span>))
<strong class="hl-keyword">return</strong> atoi(_str);
<strong class="hl-keyword">else</strong>
<strong class="hl-keyword">return</strong> strtoll(_str, NULL, <span class="hl-number">16</span>);
}
#<span class="hl-directive">define</span> MDI_USE_<span class="hl-number">8080</span>_X16
<em class="hl-comment">// #define MDI_USE_8080_X8</em>
<em class="hl-comment">// #define MDI_USE_6800_X16</em>
<em class="hl-comment">// #define MDI_USE_6800_X8</em>
<em class="hl-comment">// #define MDI_USE_SPI</em>
<em class="hl-comment">/* TODO: Should parse the input format from three GPIO
*
* GPIO1 GPIO2 GPIO3 Bus Mode
* ----- ----- ----- ---------
* 0 0 0 8080 X16
* 0 0 1 8080 X8
* 0 1 0 6800 X16
* 0 1 1 6800 X8
* 1 0 0 SPI 3-Wire
* 1 0 1 SPI 4-Wire
* 1 1 0 SPI 2-SDA
* 1 1 1 SPI 4-SDA
*/</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">int</strong> aic_mdi_bus_fmt_load(<strong class="hl-keyword">struct</strong> aic_mdi_cfg *cfg)
{
<strong class="hl-keyword">char</strong> *bus_mode[] = {<span class="hl-string">"8080"</span>, <span class="hl-string">"6800"</span>, <span class="hl-string">"SPI"</span>};
#ifdef MDI_USE_SPI
<strong class="hl-keyword">char</strong> *spi_mode[] = {<span class="hl-string">"3-Wire"</span>, <span class="hl-string">"4-Wire"</span>, <span class="hl-string">"2-SDA"</span>, <span class="hl-string">"4-SDA"</span>};
<em class="hl-comment">/* For SPI bus */</em>
cfg-&gt;bus_mode = MDI_BUS_MODE_SPI;
cfg-&gt;big_endian = MDI_DAT_ENDIAN_HIGH_<span class="hl-number">8</span>;
cfg-&gt;bus_spi.mode = MDI_SPI_MODE_<span class="hl-number">4</span>SDA;
printf(<span class="hl-string">"Bus mode: %s %s, Big endian: %d\n"</span>, bus_mode[cfg-&gt;bus_mode],
spi_mode[cfg-&gt;bus_spi.mode], cfg-&gt;big_endian);
<strong class="hl-keyword">return</strong> <span class="hl-number">0</span>;
#endif
#ifdef MDI_USE_<span class="hl-number">8080</span>_X16
<em class="hl-comment">/* For 8080 bus */</em>
cfg-&gt;bus_mode = MDI_BUS_MODE_<span class="hl-number">8080</span>;
cfg-&gt;bus_<span class="hl-number">8080.</span>pin = MDI_PIN_CTL_X16;
#endif
#ifdef MDI_USE_<span class="hl-number">8080</span>_X8
cfg-&gt;bus_mode = MDI_BUS_MODE_<span class="hl-number">8080</span>;
cfg-&gt;bus_<span class="hl-number">8080.</span>pin = MDI_PIN_CTL_X8;
cfg-&gt;big_endian = MDI_DAT_ENDIAN_HIGH_<span class="hl-number">8</span>;
#endif
printf(<span class="hl-string">"Bus mode: %s, Pin: %s, Big endian: %d\n"</span>, bus_mode[cfg-&gt;bus_mode],
cfg-&gt;bus_<span class="hl-number">8080.</span>pin ? <span class="hl-string">"X16"</span> : <span class="hl-string">"X8"</span>, cfg-&gt;big_endian);
<strong class="hl-keyword">return</strong> <span class="hl-number">0</span>;
}
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">void</strong> cmd_test_mdi(<strong class="hl-keyword">int</strong> argc, <strong class="hl-keyword">char</strong> **argv)
{
<strong class="hl-keyword">int</strong> c;
u32 frame_cnt = <span class="hl-number">0</span>;
<strong class="hl-keyword">struct</strong> aic_mdi_cfg cfg = {<span class="hl-number">0</span>};
optind = <span class="hl-number">0</span>;
<strong class="hl-keyword">while</strong> ((c = getopt_long(argc, argv, sopts, lopts, NULL)) != -<span class="hl-number">1</span>) {
<strong class="hl-keyword">switch</strong> (c) {
<strong class="hl-keyword">case</strong> <span class="hl-string">'c'</span>:
frame_cnt = str2int(optarg);
<strong class="hl-keyword">continue</strong>;
<strong class="hl-keyword">case</strong> <span class="hl-string">'h'</span>:
usage(argv[<span class="hl-number">0</span>]);
<strong class="hl-keyword">return</strong>;
<strong class="hl-keyword">default</strong>:
<strong class="hl-keyword">break</strong>;
}
}
<strong class="hl-keyword">if</strong> (frame_cnt)
pr_info(<span class="hl-string">"Capture %d frames from DBI\n"</span>, frame_cnt);
<strong class="hl-keyword">if</strong> (aic_mdi_bus_fmt_load(&amp;cfg) &lt; <span class="hl-number">0</span>) {
pr_err(<span class="hl-string">"Failed to get the BUS format of MDI\n"</span>);
<strong class="hl-keyword">return</strong>;
}
mpp_vin_dev_init(frame_cnt, &amp;cfg);
}
MSH_CMD_EXPORT_ALIAS(cmd_test_mdi, test_mdi, Test MDI module);</pre></div></article></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="#id__section_shh_mdy_2dc" data-tocid="id__section_shh_mdy_2dc">模块架构</a></div></li><li class="topic-item"><a href="#topic_oxx_53y_2dc" data-tocid="topic_oxx_53y_2dc">关键流程设计</a><ul><li class="section-item"><div class="section-title"><a href="#topic_oxx_53y_2dc__section_ayb_ndy_2dc" data-tocid="topic_oxx_53y_2dc__section_ayb_ndy_2dc">初始化流程</a></div></li><li class="section-item"><div class="section-title"><a href="#topic_oxx_53y_2dc__buffer" data-tocid="topic_oxx_53y_2dc__buffer">Buffer 队列管理</a></div></li><li class="section-item"><div class="section-title"><a href="#topic_oxx_53y_2dc__id7" data-tocid="topic_oxx_53y_2dc__id7">中断处理流程</a></div></li></ul></li><li class="topic-item"><a href="#topic_zfs_bjy_2dc" data-tocid="topic_zfs_bjy_2dc">自定义 DBI 命令设计</a><ul><li class="section-item"><div class="section-title"><a href="#topic_zfs_bjy_2dc__section_wnk_lqy_2dc" data-tocid="topic_zfs_bjy_2dc__section_wnk_lqy_2dc">0x3A：Interface Pixel Format</a></div></li><li class="section-item"><div class="section-title"><a href="#topic_zfs_bjy_2dc__section_h5m_4qy_2dc" data-tocid="topic_zfs_bjy_2dc__section_h5m_4qy_2dc">0xAC：GE Control</a></div></li></ul></li><li class="topic-item"><a href="#topic_udm_2jy_2dc" data-tocid="topic_udm_2jy_2dc">数据结构设计</a><ul><li class="section-item"><div class="section-title"><a href="#topic_udm_2jy_2dc__id8" data-tocid="topic_udm_2jy_2dc__id8">struct aic_mdi_cfg</a></div></li><li class="section-item"><div class="section-title"><a href="#topic_udm_2jy_2dc__dbi-bus" data-tocid="topic_udm_2jy_2dc__dbi-bus">DBI Bus 的格式定义</a></div></li><li class="section-item"><div class="section-title"><a href="#topic_udm_2jy_2dc__id9" data-tocid="topic_udm_2jy_2dc__id9">DBI 命令的回调信息</a></div></li><li class="section-item"><div class="section-title"><a href="#topic_udm_2jy_2dc__section_spl_1ry_2dc" data-tocid="topic_udm_2jy_2dc__section_spl_1ry_2dc">struct aic_mdi</a></div></li></ul></li><li class="topic-item"><a href="#topic_alp_zjy_2dc" data-tocid="topic_alp_zjy_2dc">MPP VIN Dev 层接口设计</a></li><li class="topic-item"><a href="#topic_vcy_qky_2dc" data-tocid="topic_vcy_qky_2dc">Driver 层接口设计</a></li><li class="topic-item"><a href="#topic_rxk_gry_2dc" data-tocid="topic_rxk_gry_2dc">APP Demo</a></li></ul></div>
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