————–我转载它,主要是为了自己学习
2009/11/03 17:33
搞了一段很長的時間終於把DSP功能弄起來了,該是回頭紀錄一下”眉角”了.
1.Before touch anything
目前有兩種方式可以控制DSP,一個是
TI DVSDK
提供的DSPLINK,另一個則是DSPBRIDGE.
以我從google搜尋之後的了解DSPBRIDGE目前是沒有繼續maintain.
DSPLINK是
TI
比較建議的方式.
所搭配的media library為
DSPLINK + gstreamer
DSPBRIDGE + openmax + gstreamer
http://felipec.wordpress.com/2009/10/13/new-project-gst-dsp-with-beagleboard-demo-image/
http://felipec.wordpress.com/2008/12/12/gst-openmax-demo-on-the-beagleboard/
這邊我選擇DSPLINK控制DSP
2.Software
dvsdk_3_00_02_44
gst-
ti
-plugin-full-1.00.02
gst-omapfb
Build and install to target root file system (過程就省略了)
可參考以下作法
http://ossie.wireless.vt.edu/trac/wiki/BeagleBoard_CodecEngine
安裝目錄
DVSDK
: /opt/
dvsdk
gstreamer : /opt
3.Setup
DSPLINK 透過share memory的方式跟DSP交換資料所以有另一個driver叫cmemk.ko負責建立memory pool. 但這塊memory必須脫離kernel的掌控因此必須要空出一塊memory讓cmemk.ko使用.至於大小要看實際memory size跟DSP所需要的size來決定.
http://pixhawk.ethz.ch/wiki/tutorials/omap/dsplink/memorymap
依照以上說明修改以下檔案
dsplink_1_61_03/packages/dsplink/config/all/CFG_OMAP3530_SHMEM.c
dsplink_1_61_03/packages/dsplink/dsp/inc/DspBios/5.XX/
OMAP3530
/dsplink-
omap3530
-base.tci
dsplink_1_61_03/packages/dsplink/config/all/CFG_OMAP3530_SHMEM.c
我的target board有256MB DDR,因此記憶體配置如下
# 0x40200000 60 KB CMEM (internal memory, see comment below)
# 0x80000000 200 MB Linux
# 0x8C900000 16 MB CMEM (external memory)
# 0x8D900000 2 MB DSPLINK (MEM)
# 0x8DB00000 unused
kernel boot command 加上 mem=200M
For kernel 2.6.27
optargs=init=/init omapfb.video_mode=1280x1024MR-16@60 vram=12M omapfb.vram=4M,4M,4M omapfb.debug=1 omap-dss.def_disp=lcd omap-dss.debug=1 mem=200M
For kernel 2.6.29
setenv optargs ‘init=/init omapdss.def_disp=dvi omapfb.mode=dvi:1280x1024MR-16@60 vram=12M omapfb.vram=0:4M,1:4M,2:4M mem=200M’
memory pool配置如下
insmod cmemk.ko phys_start=0x8C900000 phys_end=0x8D900000 pools=20×4096,10×131072,2×1048576,1×5250000,4×829440,2×691200
gstreamer需要設定target上的環境變數好讓系統找的到執行檔及plug-in
export PATH=$PATH:/opt/gstreamer/bin
export GST_PLUGIN_PATH=/opt/gstreamer/lib/gstreamer-0.10
export LD_LIBRARY_PATH=/opt/gstreamer/lib
3.Get DSP work
載入drivers
#cd /opt/
dvsdk
#./loadmodules.sh
CMEMK module: built on Oct 30 2009 at 20:23:52
Reference Linux version 2.6.28
File /home/gigijoe/
OMAP3530
/dvsdk_3_00_02_44/linuxutils_2_24_02/packages/
ti
/sdo/linuxutils/cmem/src/module/cmemk.c
ioremap_nocache(0x8c900000, 16777216)=0xcf000000
allocated heap buffer 0xcf000000 of size 0x32c000
cmem initialized 6 pools between 0x8c900000 and 0x8d900000
DSPLINK Module (1.61.03) created on Date: Oct 30 2009 Time: 20:20:31
# lsmod
lpm_omap3530 8276 0 – Live 0xbf02c000
dsplinkk 114052 1 lpm_omap3530, Live 0xbf00b000
cmemk 24428 0 – Live 0xbf000000
測試omapfb, 應該會在畫面上看到彩色條紋.
gst-launch videotestsrc num-buffers=1000 ! omapfbsink
播放
TI
h.264 raw data sample
gst-launch –gst-debug-level=1 filesrc location=”/media/dcim/100andro/ntsc.264″ ! typefind ! TIViddec2 ! omapfbsink
Play avi file
gst-launch –gst-debug-no-color –gst-debug=
TI
*:2 filesrc location=/media/dcim/100andro/aris.mpeg ! typefind ! qtdemux name=demux demux.audio_00 ! queue max-size-buffers=8000 max-size-time=0 max-size-bytes=0 ! typefind ! TIAuddec1 ! audioconvert ! osssink demux.video_00 ! typefind ! TIViddec2 ! omapfbsink
Play mpeg4 file
gst-launch –gst-debug-no-color –gst-debug=
TI
*:2 filesrc location=/media/dcim/100andro/KenBlock-TopGear.mp4 ! typefind ! qtdemux name=demux demux.audio_00 ! queue max-size-buffers=8000 max-size-time=0 max-size-bytes=0 ! typefind ! TIAuddec1 ! audioconvert ! osssink demux.video_00 ! typefind ! TIViddec2 ! omapfbsink
Play H.264 mpeg4 file without mp3 audio
gst-launch filesrc location=/media/dcim/100andro/sany0014.mp4 ! typefind ! qtdemux name=demux demux.video_00 ! typefind ! TIViddec2 ! omapfbsink
4.Debug
http://tiexpressdsp.com/wiki/index.php?title=Debugging_DSPLink_using_SET_FAILURE_REASON_prints
http://tiexpressdsp.com/index.php/Enabling_trace_in_DSPLink
一開始有一段時間kernel-2.6.29 DSP_init總是失敗
# ./messagegpp ./message.out 1000
========== Sample Application : Failure [0x8000800b] in [0x401] at line 522
MESSAGE ==========
Entered MESSFailure [0x8000802d] in [0x401] at line 544
AGE_Create ()
Failure [0x8000802d] in [0x401] at line 544
Failure [0x8000802d] in [0x401] at line 544
ISR_Install:445
request_irq 28
request_irq failed with error: -16
Failure [0x80008008] in [0x502] at line 459
Failure [0x80008008] in [0x80a] at line 824
Failure [0x80008008] in [0x80a] at line 1061
Failure [0x80008008] in [0x801] at line 597
Failure [0x80008008] in [0x701] at line 370
DSP_init status [0x80008008]
Assertion failed ((isrObj!= NULL) && (ISR_InstalledIsrs [isrObj->dspId][isrObj->irq] == isrObj)). File : /home/gigijoe/
OMAP3530
/dvsdk_3_00_02_44/dsplink_1_61_03/packages/dsplink/gp
p/src/../../gpp/src/osal/Linux/2.6.18/isr.c Line : 507
Failure [0x80008000] in [0x502] at line 515
Failure [0x80008008] in [0x300] at line 476
Failure [0x80008008] in [0x300] at line 563
PROC_attach () failed. Status = [0x80008008]
PROC_setup () failed. Status = [0x80008008]
Leaving MESSAGE_Create ()
Entered MESSAGE_Delete ()
Assertion failed (IS_VALID_MSGQ (msgqQueue)). File : msgq.c Line : 484
MSGQ_release () failed. Status = [0x8000800b]
Assertion failed (IS_VALID_MSGQ (msgqQueue)). File : msgq.c Line : 335
Leaving MESSAGE_Delete ()
====================================================
Trace DSPLINK driver發現request_irq 28 居然失敗了.很明顯IRQ被佔據了.
看看到底是誰
cat /proc/interrupts
CPU0
11: 0 INTC prcm
12: 1 INTC DMA
18: 0 INTC sr1
19: 0 INTC sr2
24: 0 INTC omap-iommu.1, Omap 3 Camera ISP
25: 1 INTC OMAP DSS
28: 0 INTC omap-iommu.2
56: 347 INTC i2c_omap
61: 0 INTC i2c_omap
72: 1 INTC serial idle
73: 1 INTC serial idle
74: 94 INTC serial idle, serial
77: 0 INTC ehci_hcd:usb2
83: 0 INTC mmc0
86: 14 INTC mmc1
92: 0 INTC musb_hdrc
93: 0 INTC musb_hdrc
95: 641 INTC gp timer
160: 0 GPIO mmc1
167: 0 GPIO user
181: 8 GPIO eth0
378: 0 twl4030 twl4030_usb
379: 0 twl4030 rtc0
384: 0 twl4030 mmc0
原來是iommu啊,OK,調整一下kernel config
Disable
Device Drivers->Multimedia Devices->Video Capture Adapters->OMAP 3 Camera Support
System Type->
TI
OMAP Implemenation->IOMMU Support
這樣就OK囉
其實還有一些疑慮沒有解決.
IOMMU 以 Shared IRQ 方式 request_irq而DSPLINK Driver request_irq 並不是.
因此造成問題,DSPLINK Driver是否應該以Shared IRQ方式request_irq呢?
test
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