Linux Camera Debugging Guide Contents
80-NL239-33 F Confidential and Proprietary – Qualcomm Technologies, Inc. 4
MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION
6.3.2 Probe failure..................................................................................................... 31
6.3.3 I2C error using CCI ......................................................................................... 32
6.3.4 No frames ........................................................................................................ 32
6.3.5 Dark preview ................................................................................................... 32
6.3.6 AF actuator ...................................................................................................... 33
7 ISP ISPIF module ........................................................................................... 35
7.1 Capture logs for the ISP module ................................................................................. 35
7.2 Troubleshooting .......................................................................................................... 35
7.2.1 Verify frame type ............................................................................................. 35
7.2.2 Verify VFE hardware configuration ................................................................ 36
7.2.3 Tap Raw Dump Interface (RDI) stream .......................................................... 37
8 Stats module .................................................................................................. 38
8.1 Capture logs from the Stats module ............................................................................ 38
8.2 Exposure ..................................................................................................................... 38
8.3 Flicker ......................................................................................................................... 41
8.4 Processing does not initiate ......................................................................................... 42
8.5 Examine events in Stats module ................................................................................. 42
9 Imaging library module ................................................................................. 43
9.1 Capture logs from the Imaging Library module ......................................................... 43
9.2 Capture logs related to FaceProc ................................................................................ 43
9.3 Imglib module level logging ....................................................................................... 44
9.4 Troubleshooting .......................................................................................................... 45
9.4.1 Image Quality (IQ) does not improve .............................................................. 45
9.4.2 Face detection configuration ............................................................................ 45
10 PProc module .............................................................................................. 46
10.1 Capture logs from the PProc module ........................................................................ 46
10.2 Profile hardware performance ................................................................................... 46
10.3 Troubleshoot deadlocks with mutex track logs ......................................................... 47
10.4 Troubleshooting ........................................................................................................ 47
10.4.1 Buffer underrun ............................................................................................. 47
11 Imaging codec layer .................................................................................... 49
11.1 Dump input buffers ................................................................................................... 49
11.2 Enable logs for mm-jpeg-interface ........................................................................... 50
11.3 Enable logs for OMX layer ....................................................................................... 51
11.4 ExIF issues ................................................................................................................ 52
11.5 Write new mm-jpeg-interface ................................................................................... 53
11.6 Cache invalidation .................................................................................................... 53
12 Encode JPEG ............................................................................................... 54
12.1 Dump YUV input to the JPEG encoder .................................................................... 54
13 Bus overflow ................................................................................................ 55
