OMAP35x DVSDK Build v3.00.02.44 Known Issues and Limitations

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This page lists issues and limitations that are known to exist in the OMAP35x DVSDK software for build v3.00.02.44.

Known Issues

1. SDOCM00041241 : SVIDEO: Video quality issue on TV With SVIDEO interface
2. SDOCM00041259 : DVTB: Control-C causes stack-trace to be dumped on to terminal in case of DVTB decode.
3. SDOCM00050734 : While using DVTB application for video playback, video stream display becomes faster at the end of the stream
4. SDOCM00056814 : Video decode demo hangs in stress: Behaviour observed in ES2.1 EVM The video decode demo fails (hangs) in stress after runninng 1055 iterations with error message "Error: Failed to create loader thead" for OMAP EVM 2.1. The same behaviour is not observed in OMPA EVM 3.1(with memory hole configuration) even after running 2850 iterations
5. SDOCM00056890 : Video/Image decode uisng DVTB application fails in stress: Behaviour observed in ES2.1 EVM The DVTB video decode and display fails in stress for OMPA EVM 2.1 after some 1150 itaration. It throws the error message "Thread_create: Cannot allocate memory" and "Segmentation fault". The same behaviour is not observed in OMPA EVM 3.1(with memory hole configuration) even after running 3000 iterations
6. SDOCM00057149 : SDMA performance is not enough to perform framecopies of VGA video @30FPS
7. SDOCM00057184 : OSD flicker observed when switching between decode demo and third party demo menu buttons in main menu screen
8. SDOCM00051616 : CE examples cause TLB error with default DVSDK demo loadmodules.sh
9. SDOCM00053887 : Specific stream issue: Issue with playing Video (Mpeg2) and Audio (Mp3) together. When streams from the container are extracted and use these as elementary streams with both Decode Demo and DVTB and if video and audio are played out, then the audio thread will not exit in both the cases
10. SDOCM00056334 : Static IP is getting overwritten by DHCP call in initialization script for NFS. This is a known issue. If static IP needs to be used, then the initialization script needs to be modified to comment the dhcp server initiation.
11. SDOCM00057319 : A mild click is heard at the end of the audio playback.
12. SDOCM00055964 : A mild beep is heard at the beginning of audio playback.
13. SDOCM00059851 : Video decode demo:OMAP3530:Demo hangs the target if control-c is pressed, board needs to be reset
14. SDOCM00060835 : System won't boot if mem= kernel option is not specified.
15. SDOCM00052712 : DVTB does not remove spurious data from the non standard MP3 streams.DVTB does not remove remove these bytes and gives it to codec for processing. It can cause codec to fail with extended error.
16. SDOCM00056242 : MMC Detection: OMAP fails to detect 8-bit MMC cards.
17. SDOCM00057547 : Decode demo throws the warning message about clock recieved during first run with DVI interface.
18. SDOCM00060903 : System hangs when playing an AVI clip from an SD card using GStreamer. This is observerd on ES2.1 EVM and not on ES3.1 EVM. Errors reported on the console such as "mmcblk0: retrying using single block read". This is due to a silicon defect in ES2.1 which was subsequently fixed in OMPA3 silicon version ES3.1
19. SDOCM00062098 : Mem copies in CMEM space takes 10x more than memory copies of Os allocated memory.Performing a memory copy of a CMEM allocated buffer takes 10 times more than a memory copy of malloc'ed pointers. While a 2MB copy in CMEM space takes 220ms, it's OS allocated buffer counterpart takes only 25ms.
20. SDOCM00062417 : Touchscreen does not work if mpurate is not specified on the bootargs on Revision G EVM

Limitations

1. The maximum sample rate supported by the ALSA Audio driver included in the PSP release is 48KHz.
2. DSP Link kernel object is not re-built in the top level makefile.
3. Maximum of 16M memory can only be provided for double buffering when rotation is enabled.
4. The Audio Capture for Speech encode is not set by default,we can set this value using the amixer utility.Steps for enabling Audio Capture for Speech encode are mentioned in the OMAP35x DVEVM Getting Started Guide
5. The path for audio capture for speech encode is not set by default in the ALSA driver. Use the amixer utility for checking the audio capture. This utility enables the required path in the ALSA driver for audio capture.
6. SDMA performance is not enough to perform framecopies of VGA video @30FPS. There is no burst mode support in the SDMA copy APIs in the SCPY interface provided by framework components
7. PumpKIN server included in \OMAP35x-PSP-SDK-#_##_##_##\host-tools\windows has reported hang while transfering data.It is recommened to use other tftp utilitied like tftpd32.
8. The Mpeg4 encode and H264 Decode combinations fails.This is due to the codec server as per DDRALGHEAP#What_are_the_limitations_of_the_OMAP35x_Codec_Server.3F. The DDRALGHEAP needs to be increased.
9. In NAND Filesystem(JFFS2 Filesystem) the video stops after 40-50 seconds while audio plays on.Once audio has finished both the drivers close and restart.Reason why you see this is since the streams present in JFFS2 truncated so that the size of the file could be adjusted to fit jffs2 without disturbing the quality. These streams are of 40-50 seconds duration only. The original streams size(present in NFS filesystem) were about 76MB per steam so we could not package it in JFFS2.

Defects Fixed

1. SDOCM00060833 :Playback of AVI clip with GStreamer gives OOM after 5 minutes.The linux memory has been increased to 99M.
2. SDOCM00060834 :Ram-disk usage can crash system.Updated Pre-built FS binaries to Arago release 2009.09-rc3 version. The default limit for "tmpfs" mount on /media/ram has been reduced to 16MB from 41MB(as part of auto mount scripts)
3. SDOCM00061577 :Decode Demo using new high quality streams is occassionally going below 30 fps.This has been corrected by reducing and minimising the occurrences of memory copies that happen when loading a file.
4. SDOCM00061482 :OMAP3 DVSDK should redistribute the EDMA3LLD product.The EDMALLD has been included in the DVSDK and enviournment variable is set in Rules.Make file.
5. SDOCM00061064 :*FIX ATTACHED*: LINUXLIBS directory has incorrect information in .pc and .la files.Linuxlibs has been modified and installed in DVSDK package.
6. SDOCM00057094 :OMAP3530: Errors thrown while booting the EVM 2.1 and 3.1.They have been removed by the updated uboot and kernel versions.
7. SDOCM00061374 :modules in kernel_binaries directory do not work with shipped kernel image.Makefile is modifed so that pre-built binaries are not overwritten at built time.
8. SDOCM00061385 :OMAP3530:Decode Demo:Info key is press on keypad causes system crash.

See Also

• OMAP35x_DVSDK_Build_v3.00.00.40_Known_Issues_and_Limitations
• OMAP35x_DVSDK_Build_v3.00.01.42_Known_Issues_and_Limitations
• OMAP35x_DVSDK_Beta2_to_GA_Migration_Guide