高通平台LCM相关专业术语首字母缩写Acronyms

——Wu_Being

80-p3255-23_b_msm8953_display_quick_start.pdf

Gamut Mapping (GM)

Adaptive Brightness/ Backlight Adjustment (ABA) Content Adaptive Backlight (CABL) Fidelity Optimized Signal Scaling (FOSS) Apical Assertive Display (AD)

80-p3255-3_c_msm8953_sdm450_linux_android_display_overview.pdf

Qualcomm Snapdragon Display Engine (SDE)

HDMI高清晰度多媒体接口（High-Definition Multimedia Interface） Display Stream Interface (DSI) 2HDMI VIG视频积分组（Video Integrating Group） SMP blocks MDP clock

SDE 516 Block Diagram

Source surface processor (ViG, RGB, and DMA) Format conversion and quality improvement for source surfaces (video, graphics, and so on) ViG pipe –For video and graphics RGB pipe –For graphics DMA pipe–For graphics and rotation Layer mixer Select source inputs and blend surfaces together Destination Surface Processor Pipes (DSPP) Color conversion, color correction, and color adjustment based on the panel characteristics WB2 (WFD: WiFi-Display)Writes composed output back to memory

Feature Details

Source Surface Processor Pipes (SSPP) CSC DSPP Destination Surface Processor Pipes CABL :Content AdaptiveBacklight Control（在平台实现） FOSS : Human Visual System (HVS) SVI :Sunlight visibility improvement CABC :技术使手机背光省电技术，目前有两种实现方案，分别是：环境光侦测适应背光控制（Light Adaptive Brightness Control - LABC）和内容适应背光技术（Content Adaptive Brightness Control – CABC（在LCM的 IC实现，））。 CAF –Content adaptive filter PCMN–Phase control M/N

Android Display Subsystem

Android frameworks –Surface texture, SurfaceFlinger QTI HALs –Overlay, graphics allocation, and hardware composer Primary panel interfaces –MIPI DSI External display –WFD Snapdragon Display Manager (SDM) core –SDE drivers, pipe configuration, clocks/power/performance Post processing and color management –CABL, sharpening, color conversion, and so on.

SDM Architecture

Core –Manages lifecycle of SDM and provides interfaces to create and destroy displays Display interface–Manages display lifecycle and interacts with driver for composition operations Composition Manager –Interacts with strategy and resource modules to determine composition strategy Strategy –Analyzes layer stack and selects composition strategy Partial Update –Identifies updating region and aligns it to hardware bounds Resource –Manages pipes, bandwidth, and writes back blocks Rotator –Interacts with driver for rotation operations Hardware FrameBuffer/Rotator –Translates SDM definitions toFB/WB/Rotator driver HWC wrapper–Translates SurfaceFlinger calls to SDM

SDE Driver Software Block Diagram

mdss_fb Top-level IOCTL/native frame buffer interface mdss_mdp.c SDE resources (clocks/irq/bus-bw/power) mdss_mdp_layer Atomic top-level API mdss_mdp_ctl Control is the hardware abstraction to club the (LM + DSPP + ping-pong+ interface) mdss_mdp_pipe SRC pipe-related handling mdss_mdp_intf SDE panel interface-related handling mdss_mdp_pp Postprocessing-related implementation mdss_rotator Rotator APIs

Qualcomm Display Color Management (QDCM) PC Tool

Hue, Saturation, Intensity, and Contrast (HSIC) Customer Engineering (CE)

Acronym or term

Definition ABL Adaptive Backlight AD Assertive Display CABL Content AdaptiveBacklight Control CAF Content Adaptive Filter CE Customer Engineering DMA DirectMemory Access DSC Display Stream Compression DSI Display Serial Interface DSPP Destination Surface Processor Pipes HWC Hardware Composer HVS Human Visual System LUT Look Up Table MDSS Multimedia Display Subsystem QDCM Qualcomm Display Color Management SDE Snapdragon Display Engine SSPP Source Surface Processor Pipes WFD Wi-Fi Display

EMI ：电磁干扰(Electro Magnetic Interference)

80-nu323-3-multimedia driver development and bringup guide - display.pdf

The Global Component Database全局组件数据库 (GCDB)

preferred vendor list推荐供应商列表 (PVL)

1. 面板 dtsi 文件中的如下所示节点表示将使用的背光类型。按照如下所示进行设置。
   qcom,mdss-dsi-bl-pmic-control-type: 用于指定此面板的背光控制方法的字符串。
   “bl_ctrl_pwm” = 由 PWM GPIO 控制背光。
   “bl_ctrl_wled” = 由 WLED 控制背光。
   “bl_ctrl_dcs” = 由 DCS 命令控制背光。
   其他：未知背光控制。（默认）
   blanking low power period (BLLP)
   撕裂启用 (TE) 引脚。tear

Wu_Being博客声明：本人博客欢迎转载，请标明博客原文和原链接！谢谢！

《高通平台LCM相关专业术语首字母缩写Acronyms（不断更新）》：

如果你看完这篇博文，觉得对你有帮助，并且愿意付赞助费，那么我会更有动力写下去。