高通平台LCM相關專業術語首字母縮寫Acronyms
——Wu_Being
Gamut Mapping (GM)
Adaptive Brightness/ Backlight Adjustment (ABA)
Content Adaptive Backlight (CABL)
Fidelity Optimized Signal Scaling (FOSS)
Apical Assertive Display (AD)
Qualcomm Snapdragon Display Engine (SDE)
HDMI高清晰度多媒體接口（High-Definition Multimedia Interface）
Display Stream Interface (DSI) 2HDMI
VIG視訊積分組（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（在平台實作）
FOSS :
Human Visual System (HVS)
SVI :Sunlight visibility improvement
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 ：電磁幹擾(Electro Magnetic Interference)
The Global Component Database全局元件資料庫 (GCDB)
preferred vendor list推薦供應商清單 (PVL)
面闆 dtsi 檔案中的如下所示節點表示将使用的背光類型。按照如下所示進行設定。
qcom,mdss-dsi-bl-pmic-control-type: 用于指定此面闆的背光控制方法的字元串。
“bl_ctrl_pwm” = 由 PWM GPIO 控制背光。
“bl_ctrl_wled” = 由 WLED 控制背光。
“bl_ctrl_dcs” = 由 DCS 指令控制背光。
其他：未知背光控制。（預設）
blanking low power period (BLLP)
撕裂啟用 (TE) 引腳。tear
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