OMAP3 TI DSP Bridge

-
The following instructions are for 2.6.28 linux omap pm branch + tidspbridge
Few links:
* http://gitorious.org/projects/tidspbridge/repos/mainline - TIDSP Bridge codebase
* http://patchwork.kernel.org/project/linux-omap/list/?q=DSP - pending patches on linux-omap mailing list
* http://git.kernel.org/?p=linux/kernel/git/khilman/linux-omap-pm.git;a=summary - kevin's tree for Power management

Steps:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm.git
cd linux-omap-pm
git checkout -b pm-2.6.28 --track origin/pm-2.6.28
git checkout -b tidspbridge
git pull git://gitorious.org/tidspbridge/mainline.git tidspbridge-pm-2.6.28

make omap_3430sdp_defconfig

for powermanagement:
make CONFIG_OMAP_PM_SRF=y
CONFIG_MPU_BRIDGE=m or y which ever is your preference..
enable BRIDGE_DVFS as y
make uImage;make modules

and bingo you should have arch/arm/mach-omap2/dspbridge.ko and arch/arm/mach-omap2/dspbridge.ko if you have dspbridge as a a module ;)...

insmod dspbridge.ko
insmod bridgedriver.ko shm_size=0x400000 phys_mempool_base=0 base_img=baseimage.dof should have the bridge driver running with a baseimage..

[Update: As Ragha mentioned in his comment, the other way would be to set up a reserved memory using mem=XYZM and allocate the remaining memory as statically allocated memory to the bridge driver -> there is a linux-omap post somewhere which I need to dig up for details :( ]

(okay, i need to figure out where baseimage.dof or other dofs can be got from.. but checkout the pointers felipe says here: http://elinux.org/BeagleBoard/DSP_Howto)

Comments

Ragha said…
If you use phys_mempool_base=0, the shared memory required for bridge is pulled from DMA zone. Was that your intention?

You can reserve 6M of RAM and provide that address here.
4:19 PM CDT
Nishanth Menon said…
that is correct. with the new allocation strategy that Hiroshi introduced for arch/arm/mach-omap2/dspbridge.ko the rellocation risk of dma_alloc_coherent fragmentation should no longer be present
6:06 PM CDT
Ajit said…
Hi, Will it work for OMAP3530 as well.
9:50 AM CDT
Post a Comment

Popular posts from this blog

simpler alternative to minicom

-
Tired of setting up and switching ports in minicom and want something simple? welcome to picocom setup a script such as ~/bin/ttyUSB0 picocom -f n -p n -b 115200 -i -r -l /dev/ttyUSB0 and next time, just run ttyUSB0 and viola u have a terminal.. ctrl+a followed by ctrl+q quits..
Read more

Quick and Dirty userspace testing of regulator with virtual consumer

-
Writing a driver for a new regulator is usually fun, until you need to test the darned thing. Many of the users of the regulator is probably not yet ready in an development environment and need to test cant wait. I had recently a similar situation and found CONFIG_REGULATOR_VIRTUAL_CONSUMER You'd probably register and provide and regulator supply, but without a driver using it in a controlled environment (read shell script or so), it is hard to poke holes completely into your driver. Steps are rather simple. Assumption - you already have a regulator registered in the system and you are aware of the regulator name - You can also figure out it's name by the following (an example from 3.9-rc8 on Beagle-XM): # head /sys/class/regulator/*/name ==> /sys/class/regulator/regulator.0/name /sys/class/regulator/regulator.1/name /sys/class/regulator/regulator.2/name /sys/class/regulator/regulator.3/name /sys/class/regulator/regulator.4/name /sys/class/regulator/regulator.5/...
Read more

Setting up Email forwarding System for GIT

-
Image
The post is a derivative of the omapzoom wiki page . Disclaimer: my mastery of the wiki tags are dismal.. apologies... some day i hope to have time to post it here Many new developers have been stumped when they need to use git-send-email in corporate environment – usually, if not as a norm, ms exchange servers form the backbone of such an email server system. This page was written based on one of such requirements. To get started, we shall consider common scenarios: a) Setting up a mail forwarding system with postfix on ubuntu b) Setting up a mail forwarding system on a fedora machine c) Using msmtp for using gmail a. to send a patch using a gmail ID b. to send a patch using your corporate ID but through gmail Postfix on Ubuntu – mail forwarding For setting up postfix, you need: a) A mail relay server which will allow your machine to talk to it -> speak to your IT representatives/ other developers sitting next to you b) Super user privileges on the machine you are working on. Step...
Read more