高通camx debug log 控制 及 UseCase pipeline debug（四）
如題，log開的好，問題都能搞。
Camera user mode driver (UMD)
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出于調試目的，有兩種方法可以覆蓋相機驅動程序的默認設置
方法一： Push a configuration file to/vendor/etc/camera/camxoverridesettings.txt
例如：
adb rootadb remountadb shell "echo logInfoMask=0x2 >> /vendor/etc/camera/camxoverridesettings.txt"方法二：安卓系統屬性設置:
adb shell setprop <setting>?<value>
例如：
adb shell setprop persist.vendor.camera.logInfoMask 0x2注意：有的配置需要殺 camera 進程 或者 重啟設備 才能生效
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所有的camera debug log 遵循下面的格式:
CamX: [<Verbosity Level>][<Group>] <File>:<Line Number> <Function Name>
<Message>
例如：
CamX: [INFO][CORE] camxexamplefile:123 ExampleFunction()This is the message.camera driver debug log 分割成了很多組，每組對應很多的log，使能這部分log需要設置正確的bitmask，規則如下：
| Driver Group Name | Value | Description |
| CamxLogGroupNone | (1 << 0) | Generic default group |
| CamxLogGroupSensor | (1 << 1) | Sensor |
| CamxLogGroupIFace | (1 << 2) | IFace |
| CamxLogGroupISP | (1 << 3) | ISP |
| CamxLogGroupPProc | (1 << 4) | Post processor |
| CamxLogGroupHAL | (1 << 7) | HAL |
| CamxLogGroupJPEG | (1 << 8) | JPEG |
| CamxLogGroupStats | (1 << 9) | 3A algorithms |
| CamxLogGroupCSL | (1 << 10) | Camera service layer |
| CamxLogGroupUtils | (1 << 12) | Utilities |
| CamxLogGroupSync | (1 << 13) | Synchronization/mutex/fences |
| CamxLogGroupMemSpy | (1 << 14) | Memory tracker |
| CamxLogGroupCore | (1 << 16) | Core camera system |
| CamxLogGroupHWL | (1 << 17) | Hardware layer |
| CamxLogGroupChi | (1 << 18) | Camera HAL interface |
| CamxLogGroupDRQ | (1 << 19) | Deferred request queue |
| CamxLogGroupFD | (1 << 20) | Face detection |
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Camera kernel mode driver (KDM) logs
備注：一般調試全開即可
adb shell "echo 0xFFFFFFFF > /sys/module/cam_debug_util/parameters/debug_mdl"| KMD Group | Value | Description |
| CAM_CDM | (1 << 0) | Camera data mover |
| CAM_CORE | (1 << 1) | Camera core |
| CAM_CPAS | (1 << 2) | Camera peripherals and support |
| CAM_ISP | (1 << 3) | Image signal processor |
| CAM_CRM | (1 << 4) | Camera request manager |
| CAM_SENSOR | (1 << 5) | Sensor |
| CAM_SMMU | (1 << 6) | Shared memory management unit |
| CAM_SYNC | (1 << 7) | Synchronization |
| CAM_ICP | (1 << 8) | Image control processor |
| CAM_JPEG | (1 << 9) | JPEG |
| CAM_FD | (1 << 10) | Face detection |
| CAM_LRME | (1 << 11) | Low resolution motion estimation |
| CAM_FLASH | (1 << 12) | Flash |
| CAM_ACTUATOR | (1 << 13) | Actuator |
| CAM_CCI | (1 << 14) | Camera control interface |
| CAM_CSIPHY | (1 << 15) | Camera serial interface |
| CAM_EEPROM | (1 << 16) | Electronically erasable programmable read-Only memory |
| CAM_UTIL | (1 << 17) | Utilities |
| CAM_HFI | (1 << 18) | Host-firmware interface |
| CAM_CTXT | (1 << 19) | Camera context |
| CAMX_OIS | (1 << 20) | Optical image stabilization |
使能 camera kernel driver log：
例如：
使能 CAM_SENSOR 和 CAM_ICP 在KMD log中，使用命令：
adb rootadb remountadb shell “echo 0x120 > /sys/module/cam_debug_util/parameters/debug_mdl”adb shell cat /proc/kmsg > name_of_kmd_logs.txt要動態啟用CSID IRQ日志，使用命令：
adb shell “echo MASKVALUE > /sys/kernel/debug/camera_ife/ife_csid_debug”
例如:
使能 SOF, EOF, SOT, EOT IRQs:
adb shell “echo 0xf > /sys/kernel/debug/camera_ife/ife_csid_debug”| CSID Debug Group | Value | Description |
| CSID_DEBUG_ENABLE_SOF_IRQ | (1 << 0) | Start of frame |
| CSID_DEBUG_ENABLE_EOF_IRQ | (1 << 1) | End of frame |
| CSID_DEBUG_ENABLE_SOT_IRQ | (1 << 2) | Start of transmission |
| CSID_DEBUG_ENABLE_EOT_IRQ | (1 << 3) | End of transmission |
| CSID_DEBUG_ENABLE_SHORT_PKT_CAPTURE | (1 << 4) | Short packet capture |
| CSID_DEBUG_ENABLE_LONG_PKT_CAPTURE | (1 << 5) | Long packet capture |
| CSID_DEBUG_ENABLE_CPHY_PKT_CAPTURE | (1 << 6) | CPHY packet capture |
（TODO: 有時間需整理mipi協議）
2. 使能 CSIPHY log
adb shell “echo 1 > /sys/module/cam_csiphy_core/parameters/csiphy_dump”adb shell cat /proc/kmsg > name_of_kmd_logs.txtUseCase pipeline debug（Topology?log）
以 UsecaseJPEGEncodeLiveSnapshot pipeline 為例：
CamX : [ INFO][CORE ] camxhaldevice.cpp:200 SelectUsecase() Topology: Selected Usecase UsecaseJPEGEncodeLiveSnapshot CamX : [ INFO][CORE ] camxpipeline.cpp:292 CreateNodes() Topology: Creating Pipeline, numNodes 9 isRealTime 1 CamX : [ INFO][CORE ] camxpipeline.cpp:309 CreateNodes() Topology: Node:InstanceId Sensor:0 Type 0 numInputPorts 0 numOutputPorts 1 CamX : [ INFO][CORE ] camxpipeline.cpp:309 CreateNodes() Topology: Node:InstanceId IFE:0 Type 65536 numInputPorts 1 numOutputPorts 5 CamX : [ INFO][CORE ] camxpipeline.cpp:309 CreateNodes() Topology: Node:InstanceId Stats:0 Type 1 numInputPorts 2 numOutputPorts 1 CamX : [ INFO][CORE ] camxpipeline.cpp:309 CreateNodes() Topology: Node:InstanceId AutoFocus:0 Type 5 numInputPorts 1 numOutputPorts 1 CamX : [ INFO][CORE ] camxpipeline.cpp:309 CreateNodes() Topology: Node:InstanceId BPS:0 Type 65539 numInputPorts 1 numOutputPorts 1 CamX : [ INFO][CORE ] camxnode.cpp:419 InitializeSinkPortBufferProperties() Topology: IPE:0 has a sink port id 8 using format 13 dim 1920x1080 CamX : [ INFO][CORE ] camxnode.cpp:419 InitializeSinkPortBufferProperties() Topology: IPE:0 has a sink port id 9 using format 13 dim 1920x1080 CamX : [ INFO][CORE ] camxpipeline.cpp:309 CreateNodes() Topology: Node:InstanceId IPE:0 Type 65538 numInputPorts 1 numOutputPorts 2 CamX : [ INFO][CORE ] camxpipeline.cpp:309 CreateNodes() Topology: Node:InstanceId IPE:1 Type 65538 numInputPorts 1 numOutputPorts 1 CamX : [ INFO][CORE ] camxpipeline.cpp:309 CreateNodes() Topology: Node:InstanceId JPEG Encoder:0 Type 65537 numInputPorts 1 numOutputPorts 1 CamX : [ INFO][CORE ] camxnode.cpp:419 InitializeSinkPortBufferProperties() Topology: JPEG Aggregator:0 has a sink port id 1 using format 0 dim 3840x2160 CamX : [ INFO][CORE ] camxpipeline.cpp:309 CreateNodes() Topology: Node:InstanceId JPEG Aggregator:0 Type 6 numInputPorts 1 numOutputPorts 1 CamX : [ INFO][CORE ] camxpipeline.cpp:371 CreateNodes() Topology: Link: Sensor:0(outPort 0) --> (inPort 2)IFE:0 using format 0 CamX : [ INFO][CORE ] camxpipeline.cpp:371 CreateNodes() Topology: Link: IFE:0(outPort 17) --> (inPort 0)Stats:0 using format 6 CamX : [ INFO][CORE ] camxpipeline.cpp:371 CreateNodes() Topology: Link: IFE:0(outPort 21) --> (inPort 1)Stats:0 using format 6 CamX : [ INFO][CORE ] camxpipeline.cpp:371 CreateNodes() Topology: Link: IFE:0(outPort 20) --> (inPort 4)AutoFocus:0 using format 6 CamX : [ INFO][CORE ] camxpipeline.cpp:371 CreateNodes() Topology: Link: IFE:0(outPort 8) --> (inPort 0)BPS:0 using format 9 CamX : [ INFO][CORE ] camxpipeline.cpp:371 CreateNodes() Topology: Link: IFE:0(outPort 0) --> (inPort 0)IPE:0 using format 3 CamX : [ INFO][CORE ] camxpipeline.cpp:371 CreateNodes() Topology: Link: BPS:0(outPort 1) --> (inPort 0)IPE:1 using format 12 CamX : [ INFO][CORE ] camxpipeline.cpp:371 CreateNodes() Topology: Link: IPE:1(outPort 8) --> (inPort 0)JPEG Encoder:0 using format 3 CamX : [ INFO][CORE ] camxpipeline.cpp:371 CreateNodes() Topology: Link: JPEG Encoder:0(outPort 1) --> (inPort 0)JPEG Aggregator:0 using format 3根據上述log，可以找到 chi-cdk/vendor/topology 下面的?UsecaseJPEGEncodeLiveSnapshot 參考 usecase 、pipeline 的xml
文件應該可以畫出以下usecase 拓展圖（沒有畫 inport 和 outport，可理解為每個pipeline必有進有出）
在熟練掌握 UDM KDM 及 usecase 的 debug 流程之后，解起問題稱心如意。如果不是這樣，那一定是你的log 沒加對，自省。
總結
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