Tegra 4 support merged in kernel 3.13

[scaronni]

Hello,

support for Tegra 124 devices has been merged in kernel 3.13; any chance to see your work rebased on 3.13? I'm a Fedora packager and would like to try preparing a barebone Fedora system to be used on the Shield (which, by chance, is coming to my mail today!).

Regards,
--Simone

[Gnurou]

Hi Simone,

Phoronix got their numbers wrong - Tegra 4 is T114, T124 is actually the next generation of (currently not available) Tegra chips.

T114 support has been around for a while and works pretty well already on the 3.12 kernel on which my branch is based. I will anyway rebase it as -rcs are released so it remains up-to-date. Hopefully in the near future (3.14?) you will just be able to clone Linus' tree and boot on SHIELD.

I'm very excited to hear about your plans to run Fedora on SHIELD. It should not be too hard to do considering I have been able to do it with Arch Linux. Here are a few things that may help you:

• I have just uploaded an initramfs that is able to mount an filesystem image file on SHIELD's data partition as the root filesystem for Linux. This allows you to have a permanent Linux installation on it without losing the ability to use Android. You will still need to boot Linux using fastboot boot, at least until we come with a way to use kexec for dual-boot. Here it is: https://github.com/linux-shield/bbinitramfs
• For xorg, please use the fbdev driver for now. I hope to get tegra-drm and grate running so we can get hardware acceleration, but I just don't have the time at the moment (please feel free to give it a go if you want). Here is the config file I use to have the screen properly oriented: https://gist.github.com/Gnurou/7424833
• And here is the xorg config file that maps the joysticks/buttons to mouse and keyboard actions: https://gist.github.com/Gnurou/6576773

You will see that USB host works and that you can plug a USB hub with a keyboard and mouse connected. Simultaneous charging using a special cable is not working yet however, this is one of the next steps on my TODO list.

Please don't hesitate to post again if there is anything on clear. Oh, and of course we want to see the Youtube video of your accomplishments. ;)