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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">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/display/display_debug.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">调试指南</h1>
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<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 10 minute(s)
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</div>
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<div class="- topic/body concept/conbody body conbody">
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<p class="- topic/p p" data-ofbid="d200529e33__20250123155222">如无特殊说明，本节描述的 DE 驱动表示显示模块的驱动，包含显示引擎模块、显示接口模块以及 LCD 的 panel 驱动，并非仅指示显示引擎。</p>
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<p class="- topic/p p" data-ofbid="d200529e36__20250123155222">关于本节涉及的 Component、CMA 和 DMA-BUF 的详细设计描述，可查看<a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="display-design_intro.html">设计说明</a>。</p>
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<section class="- topic/section section" id="display_debug_guide__section_sqq_jyf_d1c" data-ofbid="display_debug_guide__section_sqq_jyf_d1c"><h2 class="- topic/title title sectiontitle">打开 DE 调试开关</h2>
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<div class="- topic/p p" data-ofbid="d200529e48__20250123155222">在 <span class="- topic/ph ph">Luban</span> 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make linux-menuconfig</span>，进入 kernel 的功能配置，打开
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DE 模块的 DEBUG
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选项：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_m1n_kpn_f1c" data-ofbid="display_debug_guide__codeblock_m1n_kpn_f1c"><code>Linux
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Kernel hacking
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ArtInChip Debug
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[*] DE driver debug</code></pre></div>
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<div class="- topic/p p" data-ofbid="d200529e59__20250123155222">打开 DEBUG 选项后：<ul class="- topic/ul ul" id="display_debug_guide__ol_ucp_mss_c1c" data-ofbid="display_debug_guide__ol_ucp_mss_c1c">
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<li class="- topic/li li" data-ofbid="d200529e63__20250123155222">
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<p class="- topic/p p" data-ofbid="d200529e65__20250123155222">驱动以<code class="+ topic/ph pr-d/codeph ph codeph">-O0</code> 编译。</p>
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</li>
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<li class="- topic/li li" data-ofbid="d200529e72__20250123155222">
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<p class="- topic/p p" data-ofbid="d200529e74__20250123155222"><span class="+ topic/keyword pr-d/parmname keyword parmname">pr_dbg()</span> 和 <span class="+ topic/keyword pr-d/parmname keyword parmname">dev_dbg()</span> 调试信息会被编译。</p>
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<div class="- topic/p p" id="display_debug_guide__p_wvf_n3w_mdc" data-ofbid="display_debug_guide__p_wvf_n3w_mdc">在系统运行时，如果要打印 <span class="+ topic/keyword pr-d/parmname keyword parmname">pr_dbg()</span> 和
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<span class="+ topic/keyword pr-d/parmname keyword parmname">dev_dbg()</span> 信息，还需要调整 <span class="+ topic/keyword pr-d/parmname keyword parmname">loglevel</span> 为
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8，可以通过以下两种方式实现：<ul class="- topic/ul ul" id="display_debug_guide__ol_vcp_mss_c1c" data-ofbid="display_debug_guide__ol_vcp_mss_c1c">
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<li class="- topic/li li" data-ofbid="d200529e95__20250123155222">
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<p class="- topic/p p" data-ofbid="d200529e97__20250123155222">在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 中修改
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<span class="+ topic/keyword pr-d/parmname keyword parmname">bootargs</span>，增加
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<span class="+ topic/keyword pr-d/parmname keyword parmname">“loglevel=8”</span></p>
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</li>
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<li class="- topic/li li" data-ofbid="d200529e109__20250123155222">
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<div class="- topic/p p" data-ofbid="d200529e111__20250123155222">在板子启动到 Linux Shell
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后，执行下列命令：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_wcp_mss_c1c" data-ofbid="display_debug_guide__pre_wcp_mss_c1c"><code>echo8 > /proc/sys/kernel/printk</code></pre></div>
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</li>
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</ul></div>
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</li>
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</ul></div>
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</section>
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<section class="- topic/section section" id="display_debug_guide__section_xqq_jyf_d1c" data-ofbid="display_debug_guide__section_xqq_jyf_d1c"><h2 class="- topic/title title sectiontitle">打开 CMA 调试开关</h2>
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<div class="- topic/p p" data-ofbid="d200529e126__20250123155222">
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<ol class="- topic/ol ol" id="display_debug_guide__ol_dlx_5xl_sdc" data-ofbid="display_debug_guide__ol_dlx_5xl_sdc">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e130__20250123155222">
|
|||
|
|
<div class="- topic/div div">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e134__20250123155222">在 SDK 根目录下，执行下列命令，进入 kernel
|
|||
|
|
的功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_wg1_3ml_sdc" data-ofbid="display_debug_guide__codeblock_wg1_3ml_sdc"><code>make kernel-menuconfig</code></pre></div>
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e139__20250123155222">或使用简写命令</p>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e142__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_uss_hml_sdc" data-ofbid="display_debug_guide__codeblock_uss_hml_sdc"><code>make km</code></pre>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e150__20250123155222">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e152__20250123155222">在内核配置界面，按如下选择，打开 CMA 框架的 DEBUG
|
|||
|
|
选项：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_yqq_jyf_d1c" data-ofbid="display_debug_guide__pre_yqq_jyf_d1c"><code>Linux
|
|||
|
|
Memory Management options
|
|||
|
|
[*] CMA debug messages (DEVELOPMENT)
|
|||
|
|
[*] CMA debugfs interface</code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
</ol>
|
|||
|
|
</div>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e160__20250123155222">打开 DEBUG 选项后：<ul class="- topic/ul ul" id="display_debug_guide__ol_zqq_jyf_d1c" data-ofbid="display_debug_guide__ol_zqq_jyf_d1c">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e164__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e166__20250123155222">CMA 框架中 pr_debug() 调试信息会被编译</p>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e170__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e172__20250123155222">debugfs 中会添加 cma 结点</p>
|
|||
|
|
</li>
|
|||
|
|
</ul></div>
|
|||
|
|
</section>
|
|||
|
|
<section class="- topic/section section" id="display_debug_guide__section_arq_jyf_d1c" data-ofbid="display_debug_guide__section_arq_jyf_d1c"><h2 class="- topic/title title sectiontitle">查看组件注册信息</h2>
|
|||
|
|
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e183__20250123155222">通过以下命令查看组件的注册信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_g4j_t5j_ndc" data-ofbid="display_debug_guide__codeblock_g4j_t5j_ndc"><code>mount -t debugfs none /sys/kernel/debug/</code></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_xm2_twj_ndc" data-ofbid="display_debug_guide__codeblock_xm2_twj_ndc"><code>cat /sys/kernel/debug/device_component/soc:display-fb</code></pre></div>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e190__20250123155222">组件信息输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_brq_jyf_d1c" data-ofbid="display_debug_guide__pre_brq_jyf_d1c"><code>master name status
|
|||
|
|
-------------------------------------------------------------
|
|||
|
|
soc:display-fb bound
|
|||
|
|
|
|||
|
|
device name status
|
|||
|
|
-------------------------------------------------------------
|
|||
|
|
<span class="hl-number">98</span>a00000.de bound
|
|||
|
|
<span class="hl-number">98800000.</span>rgb bound
|
|||
|
|
panel0 bound</code></pre></div>
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e195__20250123155222">如果 bound 失败，控制台输出将显示 <samp class="+ topic/ph sw-d/systemoutput ph systemoutput sysout">not bound</samp>，如下所示：</p>
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_crq_jyf_d1c" data-ofbid="display_debug_guide__pre_crq_jyf_d1c"><code>master name status
|
|||
|
|
-------------------------------------------------------------
|
|||
|
|
soc:display-fb not bound
|
|||
|
|
|
|||
|
|
device name status
|
|||
|
|
-------------------------------------------------------------
|
|||
|
|
<span class="hl-number">18</span>a00000.de not bound
|
|||
|
|
<span class="hl-number">18800000.</span>rgb not bound
|
|||
|
|
(unknown) not registered</code></pre>
|
|||
|
|
</section>
|
|||
|
|
<section class="- topic/section section" id="display_debug_guide__section_drq_jyf_d1c" data-ofbid="display_debug_guide__section_drq_jyf_d1c"><h2 class="- topic/title title sectiontitle">调试 CMA</h2>
|
|||
|
|
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e211__20250123155222">在 menuconfig 配置中使能 CMA debug 开关后，通过 <span class="+ topic/ph ui-d/uicontrol ph uicontrol">debugfs</span> 调试 CMA。</p>
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_erq_jyf_d1c" data-ofbid="display_debug_guide__pre_erq_jyf_d1c"><code>mount -t debugfs none /sys/kernel/debug/</code></pre>
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_wph_cvj_ndc" data-ofbid="display_debug_guide__codeblock_wph_cvj_ndc"><code>ls /sys/kernel/debug/cma/cma-reserved/</code></pre>
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_ugr_cvj_ndc" data-ofbid="display_debug_guide__codeblock_ugr_cvj_ndc"><code>alloc bitmap free order_per_bit
|
|||
|
|
base_pfn count maxchunk used</code></pre>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e227__20250123155222"><strong class="+ topic/ph hi-d/b ph b">CMA 调试接口</strong>：<ul class="- topic/ul ul" id="display_debug_guide__ul_frq_jyf_d1c" data-ofbid="display_debug_guide__ul_frq_jyf_d1c">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e233__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e235__20250123155222"><span class="+ topic/keyword pr-d/apiname keyword apiname">alloc</span>：申请 cma 内存，以 page 为单位</p>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e241__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e243__20250123155222"><span class="+ topic/keyword pr-d/apiname keyword apiname">free</span>：释放 cma 内存，以 page 为单位</p>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e249__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e251__20250123155222"><span class="+ topic/keyword pr-d/apiname keyword apiname">base_pfn</span>：cma 内存起始页框号</p>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e257__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e259__20250123155222"><span class="+ topic/keyword pr-d/apiname keyword apiname">count</span>：cma 总 page 数</p>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e265__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e267__20250123155222"><span class="+ topic/keyword pr-d/apiname keyword apiname">maxchunk</span>：cma 最大连续 page 数</p>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e274__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e276__20250123155222"><span class="+ topic/keyword pr-d/apiname keyword apiname">order_per_bit</span>：每个 bit 代表 2 ^ order_per_bit 个 page</p>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e282__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e284__20250123155222"><span class="+ topic/keyword pr-d/apiname keyword apiname">bitmap</span>：记录 cma page 使用情况的位图。1 表示占用，0 表示空闲</p>
|
|||
|
|
</li>
|
|||
|
|
</ul></div>
|
|||
|
|
<ul class="- topic/ul ul" id="display_debug_guide__ul_gnq_tvj_ndc" data-ofbid="display_debug_guide__ul_gnq_tvj_ndc">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e293__20250123155222">查看 CMA page 使用情况：<ul class="- topic/ul ul" id="display_debug_guide__ul_dxp_5vj_ndc" data-ofbid="display_debug_guide__ul_dxp_5vj_ndc">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e297__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_hdk_kvj_ndc" data-ofbid="display_debug_guide__codeblock_hdk_kvj_ndc"><code>cat /sys/kernel/debug/cma/cma-reserved/bitmap</code></pre>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e302__20250123155222">输出结果示例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_nrq_jyf_d1c" data-ofbid="display_debug_guide__pre_nrq_jyf_d1c"><code><span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span>
|
|||
|
|
<span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span>
|
|||
|
|
<span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span>
|
|||
|
|
<span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span>
|
|||
|
|
<span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span>
|
|||
|
|
<span class="hl-number">4294967295</span> <span class="hl-number">4294967295</span> <span class="hl-number">2097151</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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>
|
|||
|
|
<span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</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> <span class="hl-number">0</span> <span class="hl-number">0</span> <span class="hl-number">0</span> <span class="hl-number">0</span></code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e308__20250123155222">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e310__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_j5p_pvj_ndc" data-ofbid="display_debug_guide__codeblock_j5p_pvj_ndc"><code>cat /sys/kernel/debug/cma/cma-reserved/count
|
|||
|
|
<span class="hl-number">8192</span></code></pre>
|
|||
|
|
</div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e318__20250123155222">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e320__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_hlq_qvj_ndc" data-ofbid="display_debug_guide__codeblock_hlq_qvj_ndc"><code>cat /sys/kernel/debug/cma/cma-reserved/used
|
|||
|
|
<span class="hl-number">1525</span></code></pre>
|
|||
|
|
</div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e327__20250123155222">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e329__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_qtq_rvj_ndc" data-ofbid="display_debug_guide__codeblock_qtq_rvj_ndc"><code>cat /sys/kernel/debug/cma/cma-reserved/base_pfn
|
|||
|
|
<span class="hl-number">548864</span></code></pre>
|
|||
|
|
</div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e336__20250123155222">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e338__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_d3l_svj_ndc" data-ofbid="display_debug_guide__codeblock_d3l_svj_ndc"><code>cat /sys/kernel/debug/cma/cma-reserved/order_per_bit
|
|||
|
|
<span class="hl-number">0</span></code></pre>
|
|||
|
|
</div>
|
|||
|
|
</li>
|
|||
|
|
</ul><div class="- topic/p p" data-ofbid="d200529e346__20250123155222">sysfs 的 meminfo 结点亦可查看 CMA
|
|||
|
|
的使用情况：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_jm2_hwj_ndc" data-ofbid="display_debug_guide__codeblock_jm2_hwj_ndc"><code>cat /proc/meminfo</code></pre></div><div class="- topic/p p" data-ofbid="d200529e350__20250123155222">输出结果示例如下，已省略无关信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_qrq_jyf_d1c" data-ofbid="display_debug_guide__pre_qrq_jyf_d1c"><code> ...
|
|||
|
|
CmaTotal: <span class="hl-number">32768</span> KB
|
|||
|
|
CmaFree: <span class="hl-number">29068</span> KB</code></pre><div class="- topic/note note note note_note" id="display_debug_guide__note_s55_4yf_d1c" data-ofbid="display_debug_guide__note_s55_4yf_d1c"><span class="note__title">注：</span> <div class="note__body">CmaFree 中记录的信息并不准确，推荐使用 <span class="+ topic/ph ui-d/uicontrol ph uicontrol">debugfs</span> 中 cma 节点的
|
|||
|
|
<code class="+ topic/ph pr-d/codeph ph codeph">bitmap</code> 来查看 cma page 的使用情况。</div></div></div></li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e363__20250123155222">
|
|||
|
|
<p class="- topic/p p" data-ofbid="d200529e365__20250123155222">手动申请 100 个 page</p>
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_orq_jyf_d1c" data-ofbid="display_debug_guide__pre_orq_jyf_d1c"><code>echo <span class="hl-number">100</span> > /sys/kernel/debug/cma/cma-reserved/alloc</code></pre>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e372__20250123155222">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e374__20250123155222">手动释放 100 个
|
|||
|
|
page<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_prq_jyf_d1c" data-ofbid="display_debug_guide__pre_prq_jyf_d1c"><code>echo <span class="hl-number">100</span> > /sys/kernel/debug/cma/cma-reserved/free</code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
</ul>
|
|||
|
|
</section>
|
|||
|
|
<section class="- topic/section section" id="display_debug_guide__section_rrq_jyf_d1c" data-ofbid="display_debug_guide__section_rrq_jyf_d1c"><h2 class="- topic/title title sectiontitle">查看 DMA-BUF 使用情况</h2><p class="- topic/p p" data-ofbid="d200529e385__20250123155222">在 <span class="+ topic/ph ui-d/uicontrol ph uicontrol">debugfs</span> 中查看当前 DMA-BUF 的使用情况：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_srq_jyf_d1c" data-ofbid="display_debug_guide__pre_srq_jyf_d1c"><code>mount -t debugfs none /sys/kernel/debug</code></pre>
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_ogz_2wj_ndc" data-ofbid="display_debug_guide__codeblock_ogz_2wj_ndc"><code>cat /sys/kernel/debug/dma_buf/bufinfo</code></pre><div class="- topic/p p" data-ofbid="d200529e395__20250123155222"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="display_debug_guide__image_trq_jyf_d1c" src="../../../images/display/dma_buf.png" alt="dma_buf"/></div><br/></div></section>
|
|||
|
|
<section class="- topic/section section" id="display_debug_guide__section_urq_jyf_d1c" data-ofbid="display_debug_guide__section_urq_jyf_d1c"><h2 class="- topic/title title sectiontitle">查看 <span class="+ topic/ph sw-d/filepath ph filepath">/dev/fb</span> 信息</h2>
|
|||
|
|
|
|||
|
|
<ol class="- topic/ol ol" id="display_debug_guide__ol_l1j_yxj_ndc" data-ofbid="display_debug_guide__ol_l1j_yxj_ndc">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e412__20250123155222">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e414__20250123155222">在 sysfs 中列示所有 <span class="+ topic/ph sw-d/filepath ph filepath">/dev/fb</span>
|
|||
|
|
相关信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_iyw_fwj_ndc" data-ofbid="display_debug_guide__codeblock_iyw_fwj_ndc"><code>ls /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/ -l</code></pre></div>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e422__20250123155222">输出结果示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_vrq_jyf_d1c" data-ofbid="display_debug_guide__pre_vrq_jyf_d1c"><code>-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> bits_per_pixel
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> blank
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> console
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> cursor
|
|||
|
|
-r--r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> dev
|
|||
|
|
lrwxrwxrwx <span class="hl-number">1</span> root root <span class="hl-number">0</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> device -> ../../../soc:display-fb
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> mode
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> modes
|
|||
|
|
-r--r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> name
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> pan
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> rotate
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> state
|
|||
|
|
-r--r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> stride
|
|||
|
|
lrwxrwxrwx <span class="hl-number">1</span> root root <span class="hl-number">0</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> subsystem -> ../../../../../../class/graphics
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> uevent
|
|||
|
|
-rw-r--r-- <span class="hl-number">1</span> root root <span class="hl-number">4096</span> Jan <span class="hl-number">1</span> <span class="hl-number">00</span>:<span class="hl-number">01</span> virtual_size</code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e428__20250123155222">根据需求，查看具体信息。查看信息的命令和部分输出示例如下所示：<ul class="- topic/ul ul" id="display_debug_guide__ul_ykw_gyj_ndc" data-ofbid="display_debug_guide__ul_ykw_gyj_ndc">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e432__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_n4r_byj_ndc" data-ofbid="display_debug_guide__codeblock_n4r_byj_ndc"><code>cat /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/bits_per_pixel</code></pre>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e437__20250123155222">输出示例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_j1b_4yj_ndc" data-ofbid="display_debug_guide__codeblock_j1b_4yj_ndc"><code><span class="hl-number">32</span></code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e443__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_zky_cyj_ndc" data-ofbid="display_debug_guide__codeblock_zky_cyj_ndc"><code>cat /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/blank</code></pre>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e449__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_z43_dyj_ndc" data-ofbid="display_debug_guide__codeblock_z43_dyj_ndc"><code>cat /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/console</code></pre>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e455__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_lmr_dyj_ndc" data-ofbid="display_debug_guide__codeblock_lmr_dyj_ndc"><code>cat /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/dev</code></pre>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e460__20250123155222">输出示例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_w4l_nyj_ndc" data-ofbid="display_debug_guide__codeblock_w4l_nyj_ndc"><code><span class="hl-number">29</span>:<span class="hl-number">0</span></code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e466__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_ef1_2yj_ndc" data-ofbid="display_debug_guide__codeblock_ef1_2yj_ndc"><code>cat /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/mode</code></pre>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e473__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_c2j_2yj_ndc" data-ofbid="display_debug_guide__codeblock_c2j_2yj_ndc"><code>cat /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/pan</code></pre>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e478__20250123155222">输出示例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_y5r_4yj_ndc" data-ofbid="display_debug_guide__codeblock_y5r_4yj_ndc"><code><span class="hl-number">0</span>,<span class="hl-number">0</span></code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e484__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_rhs_2yj_ndc" data-ofbid="display_debug_guide__codeblock_rhs_2yj_ndc"><code>cat /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/name</code></pre>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e489__20250123155222">输出示例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_gkb_pyj_ndc" data-ofbid="display_debug_guide__codeblock_gkb_pyj_ndc"><code>aicfb0</code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e495__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_s4y_2yj_ndc" data-ofbid="display_debug_guide__codeblock_s4y_2yj_ndc"><code>cat /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/stride</code></pre>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e500__20250123155222">输出示例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_fcn_pyj_ndc" data-ofbid="display_debug_guide__codeblock_fcn_pyj_ndc"><code><span class="hl-number">3200</span></code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d200529e506__20250123155222">
|
|||
|
|
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_crh_fyj_ndc" data-ofbid="display_debug_guide__codeblock_crh_fyj_ndc"><code>cat /sys/devices/platform/soc/soc\:display-fb/graphics/fb0/virtual_size</code></pre>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e511__20250123155222">输出示例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_nkv_pyj_ndc" data-ofbid="display_debug_guide__codeblock_nkv_pyj_ndc"><code><span class="hl-number">800</span>,<span class="hl-number">480</span></code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
</ul></li>
|
|||
|
|
</ol>
|
|||
|
|
</section>
|
|||
|
|
<section class="- topic/section section" id="display_debug_guide__section_wrq_jyf_d1c" data-ofbid="display_debug_guide__section_wrq_jyf_d1c"><h2 class="- topic/title title sectiontitle">查看 Display Engine 信息</h2>
|
|||
|
|
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e525__20250123155222">在 sysfs 中查看当前 Display Engine 的相关信息，包括 Video Layer、UI Layer、UI
|
|||
|
|
Rectangle、Tearing-effect、Display Dither、Display Timing、Display Pixelclock
|
|||
|
|
：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_zp5_qwj_ndc" data-ofbid="display_debug_guide__codeblock_zp5_qwj_ndc"><code>cat /sys/devices/platform/soc/<span class="hl-number">18</span>a00000.de/debug/display</code></pre></div>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d200529e530__20250123155222">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_xrq_jyf_d1c" data-ofbid="display_debug_guide__pre_xrq_jyf_d1c"><code>Video Layer Enable : <span class="hl-number">0</span>
|
|||
|
|
Video Layer Format : <span class="hl-number">0</span>
|
|||
|
|
Video Layer Input Size : <span class="hl-number">0</span> x <span class="hl-number">0</span>
|
|||
|
|
Video Layer Stride : <span class="hl-number">0</span> <span class="hl-number">0</span>
|
|||
|
|
Scaler Output Size : <span class="hl-number">0</span> x <span class="hl-number">0</span>
|
|||
|
|
UI Layer Control : format: <span class="hl-number">0</span>, color key<a name="fnsrc_1" href="#fntarg_1" class=" topic/fn-call fn-call "><sup><span class="hl-number">1</span></sup></a>: <span class="hl-number">0</span>, alpha<a name="fnsrc_2" href="#fntarg_2" class=" topic/fn-call fn-call "><sup><span class="hl-number">2</span></sup></a>: <span class="hl-number">1</span>
|
|||
|
|
UI Layer Input Size : <span class="hl-number">1024</span> x <span class="hl-number">600</span>
|
|||
|
|
UI Layer Color Key<a name="fnsrc_3" href="#fntarg_3" class=" topic/fn-call fn-call "><sup><span class="hl-number">3</span></sup></a> : <span class="hl-number">0</span>
|
|||
|
|
UI Layer Alpha : mode: <span class="hl-number">0</span>, g_alpha: <span class="hl-number">255</span>
|
|||
|
|
UI Rectangle Control : <span class="hl-number">1</span> <span class="hl-number">0</span> <span class="hl-number">0</span> <span class="hl-number">0</span>
|
|||
|
|
UI Rectangle Size : (<span class="hl-number">1024</span>, <span class="hl-number">600</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>) (<span class="hl-number">0</span>, <span class="hl-number">0</span>)
|
|||
|
|
UI Rectangle Offset : (<span class="hl-number">0</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>, <span class="hl-number">0</span>) (<span class="hl-number">0</span>, <span class="hl-number">0</span>)
|
|||
|
|
UI Rectangle Stride : <span class="hl-number">4096</span> <span class="hl-number">0</span> <span class="hl-number">0</span> <span class="hl-number">0</span>
|
|||
|
|
Tearing-effect : TE mode: <span class="hl-number">0</span>, TE pulse width: <span class="hl-number">0</span>
|
|||
|
|
Display Dither : dither_en: <span class="hl-number">0</span>, red depth: <span class="hl-number">0</span>, green depth: <span class="hl-number">0</span>, blue depth: <span class="hl-number">0</span>
|
|||
|
|
Display Timing : hactive: <span class="hl-number">1024</span>, vactive: <span class="hl-number">600</span> hfp: <span class="hl-number">160</span> hbp: <span class="hl-number">140</span> vfp: <span class="hl-number">20</span> vbp: <span class="hl-number">12</span> hsync: <span class="hl-number">20</span> vsync: <span class="hl-number">3</span>
|
|||
|
|
Display Pixelclock : <span class="hl-number">60000000</span> HZ</code></pre></div>
|
|||
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</section>
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<section class="- topic/section section" id="display_debug_guide__section_yrq_jyf_d1c" data-ofbid="display_debug_guide__section_yrq_jyf_d1c"><h2 class="- topic/title title sectiontitle">调试 DE Color bar 模式</h2>
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<div class="- topic/p p" data-ofbid="d200529e550__20250123155222">在 sysfs 中使用 Display Engine 的 Color Bar 模式进行调试：<ul class="- topic/ul ul" id="display_debug_guide__ol_q12_fxj_ndc" data-ofbid="display_debug_guide__ol_q12_fxj_ndc">
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<li class="- topic/li li" data-ofbid="d200529e554__20250123155222">
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<div class="- topic/p p" data-ofbid="d200529e556__20250123155222">开启 Color Bar
|
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__codeblock_q2y_fxj_ndc" data-ofbid="display_debug_guide__codeblock_q2y_fxj_ndc"><code>echo <span class="hl-number">1</span> > /sys/devices/platform/soc/<span class="hl-number">18</span>a00000.de/debug/color_bar</code></pre></div>
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</li>
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<li class="- topic/li li" data-ofbid="d200529e562__20250123155222">
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<div class="- topic/p p" data-ofbid="d200529e564__20250123155222">关闭 Color Bar
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_zrq_jyf_d1c" data-ofbid="display_debug_guide__pre_zrq_jyf_d1c"><code>echo <span class="hl-number">0</span> > /sys/devices/platform/soc/<span class="hl-number">18</span>a00000.de/debug/color_bar</code></pre></div>
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</li>
|
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</ul></div>
|
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</section>
|
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<section class="- topic/section section" id="display_debug_guide__section_asq_jyf_d1c" data-ofbid="display_debug_guide__section_asq_jyf_d1c"><h2 class="- topic/title title sectiontitle">获取 Framebuffer 截图</h2>
|
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|
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<ol class="- topic/ol ol" id="display_debug_guide__ol_qzt_4xj_ndc" data-ofbid="display_debug_guide__ol_qzt_4xj_ndc">
|
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<li class="- topic/li li" data-ofbid="d200529e579__20250123155222">
|
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<div class="- topic/p p" data-ofbid="d200529e581__20250123155222">拷贝 <span class="+ topic/ph sw-d/filepath ph filepath">/dev/fb0</span>
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裸数据。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="display_debug_guide__pre_bsq_jyf_d1c" data-ofbid="display_debug_guide__pre_bsq_jyf_d1c"><code>cp /dev/fb0 fb0.bgra</code></pre></div>
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</li>
|
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<li class="- topic/li li" data-ofbid="d200529e590__20250123155222">
|
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<p class="- topic/p p" data-ofbid="d200529e592__20250123155222">使用 ADB pull 将 <span class="+ topic/ph sw-d/filepath ph filepath">fb0.bgra</span> 文件传输到 PC 上，并使用 RawViewer
|
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软件查看。</p>
|
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<div class="- topic/p p" data-ofbid="d200529e598__20250123155222">RawViewer 软件可在其官网免费下载。<div class="- topic/note note note note_note" id="display_debug_guide__note_jh4_txj_ndc" data-ofbid="display_debug_guide__note_jh4_txj_ndc"><span class="note__title">注：</span> <div class="note__body">
|
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<p class="- topic/p p" data-ofbid="d200529e602__20250123155222">使用 RawViewer 查看 <span class="+ topic/ph sw-d/filepath ph filepath">fb0.bgra</span> 文件，需要手工设置数据源的宽高，在开启双
|
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buffer 的场景下，需要将高度 * 2。</p>
|
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</div></div></div>
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</li>
|
|||
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</ol>
|
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</section>
|
|||
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</div>
|
|||
|
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<div class="- topic/fn fn"><a name="fntarg_1" href="#fnsrc_1"><sup>1</sup></a> 表示 enable / disable 状态</div><div class="- topic/fn fn"><a name="fntarg_2" href="#fnsrc_2"><sup>2</sup></a> 表示 enable / disable 状态</div><div class="- topic/fn fn"><a name="fntarg_3" href="#fnsrc_3"><sup>3</sup></a> 表示 color value</div></article></main></div>
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</div>
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<nav role="navigation" id="wh_topic_toc" aria-label="On this page" class="col-lg-2 d-none d-lg-block navbar d-print-none">
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<div id="wh_topic_toc_content">
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#display_debug_guide__section_sqq_jyf_d1c" data-tocid="display_debug_guide__section_sqq_jyf_d1c">打开 DE 调试开关</a></div></li><li class="section-item"><div class="section-title"><a href="#display_debug_guide__section_xqq_jyf_d1c" data-tocid="display_debug_guide__section_xqq_jyf_d1c">打开 CMA 调试开关</a></div></li><li class="section-item"><div class="section-title"><a href="#display_debug_guide__section_arq_jyf_d1c" data-tocid="display_debug_guide__section_arq_jyf_d1c">查看组件注册信息</a></div></li><li class="section-item"><div class="section-title"><a href="#display_debug_guide__section_drq_jyf_d1c" data-tocid="display_debug_guide__section_drq_jyf_d1c">调试 CMA</a></div></li><li class="section-item"><div class="section-title"><a href="#display_debug_guide__section_rrq_jyf_d1c" data-tocid="display_debug_guide__section_rrq_jyf_d1c">查看 DMA-BUF 使用情况</a></div></li><li class="section-item"><div class="section-title"><a href="#display_debug_guide__section_urq_jyf_d1c" data-tocid="display_debug_guide__section_urq_jyf_d1c">查看 <span class="+ topic/ph sw-d/filepath ph filepath">/dev/fb</span> 信息</a></div></li><li class="section-item"><div class="section-title"><a href="#display_debug_guide__section_wrq_jyf_d1c" data-tocid="display_debug_guide__section_wrq_jyf_d1c">查看 Display Engine 信息</a></div></li><li class="section-item"><div class="section-title"><a href="#display_debug_guide__section_yrq_jyf_d1c" data-tocid="display_debug_guide__section_yrq_jyf_d1c">调试 DE Color bar 模式</a></div></li><li class="section-item"><div class="section-title"><a href="#display_debug_guide__section_asq_jyf_d1c" data-tocid="display_debug_guide__section_asq_jyf_d1c">获取 Framebuffer 截图</a></div></li></ul></div>
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