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摘要： Low-voltage differential signaling, orLVDS, is an electrical digital signaling standard that can run at very high speeds over inexpensivetwisted-paircopper cables. It specifies the electrical-level details for interoperability between inputs and outputs onintegrated circuitchips. Since it is the phy 阅读全文

摘要： From:http://en.wikipedia.org/wiki/Display_Serial_InterfaceThe Display Serial Interface (DSI) is a specification by the Mobile Industry Processor Interface (MIPI) Alliance aimed at reducing the cost of display sub-systems in a mobile device. This is commonly targeted at LCD and similar display techno 阅读全文

摘要： 常用配置：[color] ui = auto[user] name = Mark Zhang email = super119@139.com[core] editor = vim[diff] tool = vimdiff renames = true[difftool] prompt = No[format] headers = X-NVConfidentiality: public[sendemail] chainreplyto = false smtpserver = xxxxxxxx smtpencryption = tls from = Mark Zhang <sup... 阅读全文

摘要： From:http://blog.sina.com.cn/s/blog_6488248f0100wu6v.html再参考《Linux kernel development》中memory management一章的内容就更容易理解。high memory只存在于32位kernel下，以下文字都针对32位kernel。1）什么是high memory，为什么要有high memoryLinux人为的把4G虚拟地址空间（32位地址最多寻址4G）分为3G＋1G，其中0～3G为用户程序地址空间，3G～4G为kernel地址空间（为什么要这么分？为什么用户程序和kernel不能各自独享4G虚拟地址空间？ 阅读全文

摘要： Another good reading is: kernel Documentation/dma-buf-sharing.txtFrom:http://lwn.net/Articles/474819/BackinAugust2011,LWNlookedattheDMAbuffersharingpatchsetpostedbyMarekSzyprowski.Sincethen,thatpatchhasbeenpickedupbySumitSemwal,whomodifieditconsiderablyinresponsetocommentsfromanumberofdevelopers.The 阅读全文

摘要： DT中的simple-bus，简单来说，就是可以将该node下所有的child nodes都作为platform device注册进kernel。默认情况下，of_platform_populate是不会将node中的child nodes注册的。用法很简单，在node的compatible中添加"simple-bus"就OK了。该node的child nodes就会被注册。 阅读全文

摘要： 转自：http://www.smzdm.com/consumer-tip-common-processor-graphics-performance-ranking-site-summary.html继上次的《消费提示：看懂天梯 不被忽悠 显卡/CPU性能排名》一文后，陆续有网友向我们爆料推荐了几家关于台式机/笔记本电脑处理器和显卡性能排行的网站，例如这家PassMark(cpubenchmark)网站，包含了处理器、显卡、硬盘甚至Android手机和平板的性能排行，数据来源于大量用户，可以供选购时参考。其中比较有意思的是性价比排行（Best ValueChart），评判标准是性能/价格的比值 阅读全文

摘要： 1. 像素时钟频率The HDMI specification defines the protocols, signals, electrical interfaces and mechanical requirements of the standard.[42]The maximum pixel clock rate for HDMI 1.0 was 165MHz, which was sufficient to support1080pandWUXGA(1920×1200) at 60Hz. HDMI 1.3 increased that to 340MHz, which a 阅读全文

摘要： From:http://www.smzdm.com/consumer-tip-read-ladder-not-been-fooled-graphics-cpu-performance-ranking.html《消费提示：看懂天梯 不被忽悠　显卡/CPU性能排名》最近神马值得买推荐了很多笔记本的购买。有时候其实对笔记本显卡的性能非常疑惑，特别是一些出现频率不多的显卡，往往很多人就被导购所谓的什么2G显存之类的忽悠了。这里推荐一个很好用的东西：笔记本显卡天梯图。其实太平洋电脑网很早前就有台式机的天梯图了，之后有人就按这个做了个笔记本的。最新版笔记本显卡天梯图为：可以很明确的看到各个显卡的性能对比， 阅读全文

摘要： 1. Display and mode setting: DRM. DRM defines connector/encoder/crtc to support display(including multi-monitor). And KMS makes mode setting happens in kernel space.2. 2D acceleration: X server EXA/UXA extension. Vendor should write a X server driver which implements EXA or UXA(should be upstreamed) 阅读全文