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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/dvp/dvp_config.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">DVP 配置</h1><div class="date inPage">16 Dec 2024</div><div style="color: gray;">
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Read time: 3 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><div class="- topic/p p" data-ofbid="d132092e22__20250121171606">DVP 包括以下配置内容：<ol class="- topic/ol ol" id="dvp_configuration__ul_t2m_kyg_d1c" data-ofbid="dvp_configuration__ul_t2m_kyg_d1c"><li class="- topic/li li" data-ofbid="d132092e25__20250121171606">内核配置<p class="- topic/p p" data-ofbid="d132092e27__20250121171606">DVP 驱动依赖 buf、CMA、V4L2 模块，所以需要提前打开。</p><ol class="- topic/ol ol" type="a" id="dvp_configuration__ol_jtz_kyg_d1c" data-ofbid="dvp_configuration__ol_jtz_kyg_d1c"><li class="- topic/li li" data-ofbid="d132092e30__20250121171606">
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<div class="- topic/div div">
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<div class="- topic/p p" data-ofbid="d132092e34__20250121171606">在 SDK 根目录下，执行下列命令，进入 kernel
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的功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__codeblock_wg1_3ml_sdc" data-ofbid="dvp_configuration__codeblock_wg1_3ml_sdc">make kernel-menuconfig</pre></div>
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<p class="- topic/p p" data-ofbid="d132092e39__20250121171606">或使用简写命令</p>
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<div class="- topic/p p" data-ofbid="d132092e42__20250121171606">
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__codeblock_uss_hml_sdc" data-ofbid="dvp_configuration__codeblock_uss_hml_sdc">make km</pre>
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</div>
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</div>
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</li><li class="- topic/li li" data-ofbid="d132092e49__20250121171606">
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<p class="- topic/p p" data-ofbid="d132092e51__20250121171606">在内核配置界面，按如下选择：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__pre_ujj_3yg_d1c" data-ofbid="dvp_configuration__pre_ujj_3yg_d1c">Linux
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Memory Management options
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[*] Contiguous Memory Allocator
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</pre>
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</li><li class="- topic/li li" data-ofbid="d132092e57__20250121171606">
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<p class="- topic/p p" data-ofbid="d132092e59__20250121171606">设置 CMA 区域的大小，在内核配置的另外一个地方，如下配置为 16MB：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__pre_vjj_3yg_d1c" data-ofbid="dvp_configuration__pre_vjj_3yg_d1c">Linux
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Library routines
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[*] DMA Contiguous Memory Allocator
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(<span class="hl-number">16</span>) Size in Mega Bytes
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</pre>
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</li><li class="- topic/li li" data-ofbid="d132092e65__20250121171606">打开
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DMA-BUF<p class="- topic/p p" data-ofbid="d132092e69__20250121171606">在 SDK 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make kernel-menuconfig</span> 或
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<span class="+ topic/keyword sw-d/cmdname keyword cmdname">make me</span>，进入 kernel 的功能配置，按如下选择：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__pre_xjj_3yg_d1c" data-ofbid="dvp_configuration__pre_xjj_3yg_d1c">Linux
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Device Drivers
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DMABUF options
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[*] Explicit Synchronization Framework
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[*] Sync File Validation Framework
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[*] userspace dmabuf misc driver
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[*] DMA-BUF Userland Memory Heaps
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[*] DMA-BUF CMA Heap
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</pre></li><li class="- topic/li li" data-ofbid="d132092e79__20250121171606">打开 V4L2<p class="- topic/p p" data-ofbid="d132092e81__20250121171606">在 SDK 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make kernel-menuconfig</span> 或
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<span class="+ topic/keyword sw-d/cmdname keyword cmdname">make me</span>，进入 kernel 的功能配置，按如下选择：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__pre_zjj_3yg_d1c" data-ofbid="dvp_configuration__pre_zjj_3yg_d1c">Linux
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Device Drivers
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Multimedia support
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Media core support
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<*> Video4Linux core</pre><p class="- topic/p p" data-ofbid="d132092e91__20250121171606">打开 V4L2
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的相关选项：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__pre_akj_3yg_d1c" data-ofbid="dvp_configuration__pre_akj_3yg_d1c">Linux
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Device Drivers
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Multimedia support
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Video4Linux options
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[*] V4L2 sub-device userspace API
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[*] Enable advanced debug functionality on V4L2 drivers</pre></li><li class="- topic/li li" data-ofbid="d132092e95__20250121171606">打开 DVP<p class="- topic/p p" data-ofbid="d132092e97__20250121171606">在 SDK 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make kernel-menuconfig</span> 或
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<span class="+ topic/keyword sw-d/cmdname keyword cmdname">make me</span>，进入 kernel 的功能配置，按如下选择：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__pre_ckj_3yg_d1c" data-ofbid="dvp_configuration__pre_ckj_3yg_d1c">Linux
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Device Drivers
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Multimedia support
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Media drivers
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[*] V4L platform devices
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<*> ArtInChip Digital Video Port Support</pre></li></ol></li><li class="- topic/li li" data-ofbid="d132092e107__20250121171606">DTS 参数配置<p class="- topic/p p" data-ofbid="d132092e109__20250121171606">DTS 分别存放在 <span class="+ topic/ph sw-d/filepath ph filepath">common/</span> 和 <span class="+ topic/ph sw-d/filepath ph filepath">board/</span>
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目录中，其中 <span class="+ topic/ph sw-d/filepath ph filepath">board</span> 目录存放了 sensor 配置以及 DVP 的关联配置。</p><p class="- topic/p p" data-ofbid="d132092e120__20250121171606"><strong class="+ topic/ph hi-d/b ph b">D211
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配置</strong></p><div class="- topic/p p" data-ofbid="d132092e123__20250121171606"><span class="+ topic/ph sw-d/filepath ph filepath">common/d211.dtsi</span>
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中的参数配置：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__codeblock_vgx_ryg_d1c" data-ofbid="dvp_configuration__codeblock_vgx_ryg_d1c">dvp0: dvp@<span class="hl-number">18830000</span> {
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#address-cells = <<span class="hl-number">1</span>>;
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#size-cells = <<span class="hl-number">0</span>>;
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compatible = <span class="hl-string">"artinchip,aic-dvp-v1.0"</span>;
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reg = <<span class="hl-number">0x0</span> <span class="hl-number">0x18830000</span> <span class="hl-number">0x0</span> <span class="hl-number">0x1000</span>>;
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interrupts-extended = <&plic0 <span class="hl-number">57</span> IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&cmu CLK_DVP>;
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clock-rate = <<span class="hl-number">200000000</span>>;
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resets = <&rst RESET_DVP>;
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};</pre></div><div class="- topic/p p" data-ofbid="d132092e129__20250121171606"><span class="+ topic/ph sw-d/filepath ph filepath">xxx/board.dts</span>
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中的配置参数：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="dvp_configuration__codeblock_wxz_ryg_d1c" data-ofbid="dvp_configuration__codeblock_wxz_ryg_d1c">&dvp0 {
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status = <span class="hl-string">"okay"</span>;
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pinctrl-names = <span class="hl-string">"default"</span>;
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pinctrl-<span class="hl-number">0</span> = <&dvp_pins>; <em class="hl-comment">/* dvp 接口引脚 */</em>
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port@<span class="hl-number">0</span> {
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reg = <<span class="hl-number">0</span>>;
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dvp0_in: endpoint {
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remote-endpoint = <&ov5640_out>;
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<em class="hl-comment">/* bus-type = <6>; /* V4L2_FWNODE_BUS_TYPE_BT656 */</em>
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bus-width = <<span class="hl-number">8</span>>;
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hsync-active = <<span class="hl-number">1</span>>;
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vsync-active = <<span class="hl-number">1</span>>;
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field-even-active = <<span class="hl-number">1</span>>;
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pclk-sample = <<span class="hl-number">1</span>>;
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};
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};
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};</pre></div>DVP 驱动支持标准的 V4L2 参数，如上面的
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bus-type、bus-type、hsync-active。关于更完整的参数定义，详见 Linux 代码
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<span class="+ topic/ph sw-d/filepath ph filepath">drivers/media/v4l2-core/v4l2-fwnode.c</span> 中的
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<span class="+ topic/keyword pr-d/apiname keyword apiname">v4l2_fwnode_endpoint_parse_parallel_bus()</span> 描述。</li></ol></div></div></article></main></div>
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