Panda How to kernel 2 6 39

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Revision as of 18:43, 6 April 2011 by KenMcGuire (Talk | contribs)

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The merge window has closed and 2.6.39-rc1 has been released, There are many Pandaboard related changes, including HDMI, DVI and wl21xx support.

As of -rc1:
* hdmi & dvi are broken due to some dss clocking issues, see: https://patchwork.kernel.org/patch/674062/ for details, a fix for dvi is available, see below.
* abe sound is not supported.
* Dave Anders patch to not configure the unused power regulators of VUSIM and VAUX1 is included.
* wl12xx support is working to the extent that one can associate with an access point, get an IP address and ping out to the internet.
As of rc-2
* Neither OMAP nor PandaBoaqrd changes, no other changes to wlan, dvi or hdmi code, so stay tuned for rc-3 in about a week or so. 

The proper firmware for wl12xx support is available from: git://git.kernel.org/pub/scm/linux/kernel/git/romieu/linux-firmware.git, just clone that repository and copy the ti-connectivity directory to /lib/firmare/.

# pwd
/lib/firmware/ti-connectivity
# ls -la
total 796
drwxr-xr-x    2 default  default       1024 Mar 29  2011 .
drwxr-xr-x    4 root     root          1024 Mar 29  2011 ..
-rw-r--r--    1 default  default     273040 Mar 29  2011 wl1271-fw-2.bin
-rw-r--r--    1 default  default     262356 Mar 29  2011 wl1271-fw-ap.bin
-rw-r--r--    1 default  default     271832 Mar 29  2011 wl1271-fw.bin
-rw-r--r--    1 default  default        912 Mar 29  2011 wl1271-nvs.bin

Building 2.6.39-rc1 is basically the same as How to build 2.6.38 kernel, but of course you need the rc1 sources. The omap2plus_defconfig works, but does not enable anything interesting. config.2.6.39-rc1 enables USB, its' ethernet adapter, and wl12xx support. config.2.6.39-rc1.2 enables USB, it's ethernet adapter, wl12xx support, and dvi support. However using that config requires that the kernel sources be patched with 0001-omap4-pandaboard-fix-dvi-support.patch The patch also provices panda_dvi_defconfig which just enables dvi.

Apply it like so: (from inside the kernel sources directory)

patch -p1 < 0001-omap4-pandaboard-fix-dvi-support.patch

Then use either of the above configs or

make ARCH=arm omap2plus_defconfig
        or
make ARCH=arm panda_dvi_defconfig

Then compile with

make ARCH=arm CROSS_COMPILE=Path_to_your/arm-2009q3/bin/arm-none-linux-gnueabi- uImage

After booting run fbtest to see a nice test pattern from the dvi port.

Fbtest.jpg

More to come "real soon now"(tm)