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Panda How to kernel 3 0 rcx

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Revision as of 23:27, 30 May 2011 by KenMcGuire (Talk | contribs)

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Introduction

The 3.0-rc1 kernel has been released.

rc1

There have been regressions since 2.6.39.

Building

Building 3.0-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 once the mmc ptch is applied. Enabling USB results in very ugly kernel oopses.

MMC Patch

A patch is available which addresses the mmc issue noted above:

0002-omap4-pandaboard-fix-mmc-support.patch

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

patch -p1 < 0002-omap4-pandaboard-fix-mmc-support.patch

DVI Patch

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

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

Then use either of the following configs

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
     or
make ARCH=arm CROSS_COMPILE=Path_to_your/arm-2010q1/bin/arm-none-linux-gnueabi- uImage


i2c character device driver

Ever since 2.6.38, the i2c character device driver support from user space has been broken for OMAP44xx.
* A fix has been submitted for the linux-omap-2.6 branch, but it may be a while till it gets into an -rcx.
See http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git;a=commit;h=39fe1a6fafe1e85c183379af9f3ceda7cd24bd65 for the commit.
* A quick fix for this issue is available File:Omap44xx-i2c-fix.patch

I2C Patch

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

patch -p1 < Omap44xx-i2c-fix.patch

It applies with some fuzzes and offsets, but does apply successfuly. Then compile as above.


Testing: No testing possible yet till the booting problems are resolved

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

Fbtest.jpg

Then you can run i2cdetect and the results should look like this:

# i2cdetect -y -r 1
    0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- UU UU UU UU -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --


Stay tuned as the 3.0-rcx series evolves, where there needs to be some serious bug squashing.