Difference between revisions of "PineNote Development/Building Kernel"

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WIP!!!
This page contains information on how to build a linux kernel for the [[PineNote]].


What I'm Doing
== Available Kernel Repositories ==


# Clone mw's stuff and parse out his scripts
The following (incomplete?) PineNote-specific kernel repositories are available:
## Start clone_and_prepare_git.sh
 
### We can just run this as is. Note whatever dir we run it in will have smaeul's linux kernel cloned into it (as well as patches. aka make this a clean directory to work in)
* https://github.com/m-weigand/linux/ (based mainly on the repository from smaeul, with additional patches pulled in from other sources, Debian packages available)
### I recommend looking through the patches to see what they do. Worth noting that the patch mentioned in Dorian's notes for GPU is already here, in `rk3566-pinenote_dtsi.patch`
* https://gitlab.com/pgwipeout/linux-next/
## compile.sh
* https://github.com/smaeul/linux/tree/rk35/pinenote-next
### Run this in the same directory. I started at 12:32 (finished within 15 mins)
 
## install_to_pn.sh
== Building the kernel ==
### send dtb into `/boot/dtbs/rockchip/` (note that I don't have v1.2 yet this is new) `scp rk3566-pinenote-v1.2.dtb root@pinenote:/boot/dtbs/rockchip/`
 
### update extlinux.conf to point to this new dtb
{{Info|These following instructions need to be cleaned up and updated, and OS-specific information and tweaks should be moved elsewhere}}
### send over image to /boot
 
### send modules to overwrite what's in /lib/modules : `rsync --delete -avh --progress lib/modules/5.17.0-rc6-next-20220304-* root@pinenote:/lib/modules/`
After following [https://github.com/DorianRudolph/pinenotes#starter-guide Dorian's directions] to get Arch installed you've seen someone [https://github.com/m-weigand/mw_pinenote_misc/blob/main/videos/20220808_bw_dither_mode_picture_doom_video_small.mp4 playing DOOM]  and you want to learn how to get the features that enable that kind of performance. To get your PN running this smoothly, we'll need to build our own kernel. There are two kernel efforts underway right now:
#### I didn't have rsync installed on pinenote (it needs to be on client and server). Installation failed because i had new dtb "existing in filesystem" so I moved it to /root for now.
 
## compile mesa
# pgwipeout: https://gitlab.com/pgwipeout/linux-next
### get mesa from here: https://github.com/0cc4m/pinenote-misc/releases (I can't install since I am deving on debian, not arch).
# smaeul: https://github.com/smaeul/linux/tree/rk35/pinenote-next
### Try to run dpkg-buildpackage gives me an error saying it can't open debian/changelog. This is because I don't have the debian package, which can be obtained here (I think) : https://salsa.debian.org/xorg-team/lib/mesa/-/tree/mesa-22.1.3-1.  
 
### Install devscripts, run `mk-build-deps --install --root-cmd sudo --remove` to install build dependencies, then run dpkg-buildpackage.
We'll be using smaeul's kernel + some additional patches provided by DorianRudolph, pgwipeout, Maximilian Weigand, occam_razor, and hrdl. Thanks so much to them, and all the other users who have worked on piecing together drivers, twiddling configs, answering questions, and sharing their work in other ways. Brava!
### This spat out a ton of files into ../ (but not libmutter-9-0_41.4-1_arm64.deb as indicated in the install script. Worse, I didn't cross compile, it's all amd64 deb! I'm so dumb because it comes prebuilt in 0cc4m's stuff: https://github.com/0cc4m/pinenote-misc/releases lol
 
### Send that stuff over to the pinenote!!
Perhaps the main component of the kernel is the DRM driver. You can read more about the driver by reading [https://lore.kernel.org/linux-rockchip/20220413221916.50995-1-samuel@sholland.org/T/ Smaeul's RFC].
### Untar it and install the packages like this: https://wiki.archlinux.org/title/offline_installation_of_packages
 
# At this point everything should be installed. Let's restart and see what happens.
=== A small warning ===
## Kernel panic: https://pastebin.com/4Z0aJgHz
 
## Looking back to see if I missed anything. Mutter? Similar to mesa, but I actually have to build it. Build script has commands needed. Ah shit but I'm on debian, meaning I can only build for debian. I could do a chroot thing...but it's probably not mutter.
This guide is completely based off of the scripts provided by Maximilian. We'll be cloning and running them, but he owns them and he -- or others -- might change them. It's smart to have a look at what's going on, check when this page was last updated vs when his scripts were last updated, etc. Be nimble!
 
Additionally, as Maximilian warns [https://github.com/m-weigand/mw_pinenote_misc/tree/main/rockchip_ebc/patches here], these changes are all experimental and may damage your panel.  
 
{{info|If anyone reading this has recommended reading for how we can understand what may damage our panels (IE is the risk in fast updates? The types of updates? something more complicated?), please add it here!}}
 
=== What you should have already done ===
 
It is assumed you've already got an operating system installed on your Pinenote other than the stock Android. Doing this isn't trivial, but it is well understood - you will be following the footsteps of many others. Dorian Rudolph made a guide for doing this, available [https://github.com/DorianRudolph/pinenotes#starter-guide here].
 
=== What do you need to know? ===
 
If you followed Dorian's guide to get here and felt semi-comfortable, you'll be fine. This is no more complicated than that. If you are intimidated, that's okay! I'll still encourage you to try :) you will learn a lot, just be patient and don't put any data on your PineNote that you wouldn't be okay losing. If you run into trouble, ask for help in the [https://discord.com/invite/pine64 Discord]/[https://matrix.to/#/#pinenote:matrix.org Matrix]. Please try to solve problems on your own first, and then ask for help -- if nobody replies, please be patient and ask again soon.
 
=== Steps to build ===
 
1. Clone Maximilian's scripts:
 
$ git clone https://github.com/m-weigand/mw_pinenote_misc.git
 
2. Make a separate directory for patching the kernel. Then run Maximilian's ''clone_and_prepare_git.sh''. This will clone smaeul's kernel and a number of patches. Read the script to see which patches it is using. Feel free to open the patches too -- it's helpful to get a slim idea of what's going on, if only looking at the commit messages in them:
 
$ cd ../
$ sh mw_pinenote_misc/custom_kernel/clone_and_prepare_git.sh
 
3. Compile the kernel:
 
$ sh ./mw_pinenote_misc/custom_kernel/compile.sh
 
4. Next we want to perform the work captured in '''install_to_pn.sh''', but the work may vary slightly from person to person. As long as you put them somewhere and configure your '''extlinux.conf''' to point at it, things will be okay. Looking at '''install_to_pn.sh''', we can see that there are three pieces to installing the kernel: the kernel image (called ''Image''), the device tree (''rk3566-pinenote-v1.2.dtb''), and the modules. All of these files have been compiled and placed into the '''linux/pack''' folder. The easiest way to send these over is by using ''scp'' or ''rsync'' - read the script and decide how you would like to get your files in the correct location. You may need to install ''rsync'' on your PineNote if it doesn't already have it.
 
5. DTB was installed like this: <code>$ scp rk3566-pinenote-v1.2.dtb root@pinenote:/boot/dtbs/rockchip/</code>
 
6. After installing the DTB as above, the file '''/boot/extlinux/extlinux.conf''' may be updated to point to this new file
 
7. (Perhaps not necessary?) The last step is to generate a new initrd image (see [https://en.wikipedia.org/wiki/Initial_ramdisk Wikipedia] for an explanation about initial ramdisk). This is done on the PineNote itself. Send Maximilian's installation script over and run it. Then place the generated image (from the last step of the shell script) into your boot partition and update '''extlinux.conf''' if needed to point at this new file. 
 
$ scp initrd/gen_uboot_image.sh root@pinenote:/root # Do this part on local to put script on PN
$ ssh root@pinenote # Or use UART, the dongle + picocom, and change to root
$ cd /root
$ ./gen_uboot_image.sh
$ mv initrd.img /boot/initrd.img
$ vim /boot/extlinux/extlinux.conf # Update this to reference this new initrd image
 
8. At this point your kernel is in place! However, there are a few more steps you may need to complete to ensure the display and networking continue to work:
* For display, you may need to change '''/lib/firmware/waveform.bin''' to '''/lib/firmware/rockchip/ebc.wbf''' (TODO: is this a difference between PG and smaeul's kernel or a patch?)
* For networking, you may need to change '''/lib/firmware/pinenote.bin''' to '''/lib/firmware/pinenote-v1.2.bin'''
 
9. This part technically isn't kernel specific, but we need to install a patched version of Mesa. If you are running an Arch based system, you're in luck! occam_razor provides prebuilt patched packages (say that 5 times fast) [https://github.com/0cc4m/pinenote-misc/releases here]. Simply extract these files, send them to PN, and install them using the package manager. You can also patch it yourself by looking at Maximilian's [https://github.com/m-weigand/mw_pinenote_misc/blob/main/compile_mesa.sh compile_mesa.sh].  
 
{{Info|If you frequently update your system with ''pacman -Syu'', you will end up updating these packages and losing the patches. Add this line to your <code>/etc/pacman.conf</code> to prevent them from being updated: <pre>IgnorePkg = libva-mesa-driver mesa mesa-debug mesa-vdpau opencl-mesa vulkan-mesa-layers vulkan-broadcom vulkan-panfrost vulkan-radeon vulkan-swrast</pre>}}
 
10. To ensure the GPU stays on, we need to use Maximilian's [https://github.com/m-weigand/mw_pinenote_misc/blob/main/systemd/mweigand_eglinfo.service mweigand_eglinfo.service]. The ''Readme.md'' in that same directory has instructions for how to install this, but basically we need to copy it to '''/etc/systemd/system/''', run <code>sudo systemctl daemon-reload</code> to make sure systemd knows it exists, then execute <code>sudo systemctl enable mweigand_eglinfo.service</code>.
 
== Next steps ==
=== Configuring the driver ===
The driver has several options that can improve performance. These can be read about [https://github.com/m-weigand/mw_pinenote_misc/tree/main/rockchip_ebc/patches#new-features-as-of-2022august08 here].  <code>rockchip_ebc.bw_mode=1 rockchip_ebc.default_waveform=1 rockchip_ebc.refresh_threshold=30 rockchip_ebc.auto_refresh=1</code> may be used to make the image lower quality, but much faster to update. The auto_refresh setting is also essential to clear ghosting which will otherwise accrue on screen. The ''APPEND'' line in the '''extlinux.conf''' might be added to make sure they are applied on boot.
 
=== Fixing suspend ===
If you're using a logind system, edit your '''/etc/systemd/logind.conf''' config. More information on what to do [https://wiki.archlinux.org/title/Power_management#ACPI_event in Arch's documentation].
 
=== Configuring your apps ===
See [https://wiki.pine64.org/wiki/PineNote_Development/Apps this page].
 
=== Booting Linux instead of Android ===
[[PineNote Development/Booting Linux]]
 
=== Fixing Bluetooth ===
See [[PineNote Development/Software Tweaks]]
 
 
[[Category:PineNote]]

Latest revision as of 18:55, 14 April 2023

This page contains information on how to build a linux kernel for the PineNote.

Available Kernel Repositories

The following (incomplete?) PineNote-specific kernel repositories are available:

Building the kernel

Note: These following instructions need to be cleaned up and updated, and OS-specific information and tweaks should be moved elsewhere

After following Dorian's directions to get Arch installed you've seen someone playing DOOM and you want to learn how to get the features that enable that kind of performance. To get your PN running this smoothly, we'll need to build our own kernel. There are two kernel efforts underway right now:

  1. pgwipeout: https://gitlab.com/pgwipeout/linux-next
  2. smaeul: https://github.com/smaeul/linux/tree/rk35/pinenote-next

We'll be using smaeul's kernel + some additional patches provided by DorianRudolph, pgwipeout, Maximilian Weigand, occam_razor, and hrdl. Thanks so much to them, and all the other users who have worked on piecing together drivers, twiddling configs, answering questions, and sharing their work in other ways. Brava!

Perhaps the main component of the kernel is the DRM driver. You can read more about the driver by reading Smaeul's RFC.

A small warning

This guide is completely based off of the scripts provided by Maximilian. We'll be cloning and running them, but he owns them and he -- or others -- might change them. It's smart to have a look at what's going on, check when this page was last updated vs when his scripts were last updated, etc. Be nimble!

Additionally, as Maximilian warns here, these changes are all experimental and may damage your panel.

Note: If anyone reading this has recommended reading for how we can understand what may damage our panels (IE is the risk in fast updates? The types of updates? something more complicated?), please add it here!

What you should have already done

It is assumed you've already got an operating system installed on your Pinenote other than the stock Android. Doing this isn't trivial, but it is well understood - you will be following the footsteps of many others. Dorian Rudolph made a guide for doing this, available here.

What do you need to know?

If you followed Dorian's guide to get here and felt semi-comfortable, you'll be fine. This is no more complicated than that. If you are intimidated, that's okay! I'll still encourage you to try :) you will learn a lot, just be patient and don't put any data on your PineNote that you wouldn't be okay losing. If you run into trouble, ask for help in the Discord/Matrix. Please try to solve problems on your own first, and then ask for help -- if nobody replies, please be patient and ask again soon.

Steps to build

1. Clone Maximilian's scripts:

$ git clone https://github.com/m-weigand/mw_pinenote_misc.git

2. Make a separate directory for patching the kernel. Then run Maximilian's clone_and_prepare_git.sh. This will clone smaeul's kernel and a number of patches. Read the script to see which patches it is using. Feel free to open the patches too -- it's helpful to get a slim idea of what's going on, if only looking at the commit messages in them:

$ cd ../
$ sh mw_pinenote_misc/custom_kernel/clone_and_prepare_git.sh

3. Compile the kernel:

$ sh ./mw_pinenote_misc/custom_kernel/compile.sh

4. Next we want to perform the work captured in install_to_pn.sh, but the work may vary slightly from person to person. As long as you put them somewhere and configure your extlinux.conf to point at it, things will be okay. Looking at install_to_pn.sh, we can see that there are three pieces to installing the kernel: the kernel image (called Image), the device tree (rk3566-pinenote-v1.2.dtb), and the modules. All of these files have been compiled and placed into the linux/pack folder. The easiest way to send these over is by using scp or rsync - read the script and decide how you would like to get your files in the correct location. You may need to install rsync on your PineNote if it doesn't already have it.

5. DTB was installed like this: $ scp rk3566-pinenote-v1.2.dtb root@pinenote:/boot/dtbs/rockchip/

6. After installing the DTB as above, the file /boot/extlinux/extlinux.conf may be updated to point to this new file

7. (Perhaps not necessary?) The last step is to generate a new initrd image (see Wikipedia for an explanation about initial ramdisk). This is done on the PineNote itself. Send Maximilian's installation script over and run it. Then place the generated image (from the last step of the shell script) into your boot partition and update extlinux.conf if needed to point at this new file.

$ scp initrd/gen_uboot_image.sh root@pinenote:/root # Do this part on local to put script on PN
$ ssh root@pinenote # Or use UART, the dongle + picocom, and change to root
$ cd /root
$ ./gen_uboot_image.sh
$ mv initrd.img /boot/initrd.img
$ vim /boot/extlinux/extlinux.conf # Update this to reference this new initrd image

8. At this point your kernel is in place! However, there are a few more steps you may need to complete to ensure the display and networking continue to work:

  • For display, you may need to change /lib/firmware/waveform.bin to /lib/firmware/rockchip/ebc.wbf (TODO: is this a difference between PG and smaeul's kernel or a patch?)
  • For networking, you may need to change /lib/firmware/pinenote.bin to /lib/firmware/pinenote-v1.2.bin

9. This part technically isn't kernel specific, but we need to install a patched version of Mesa. If you are running an Arch based system, you're in luck! occam_razor provides prebuilt patched packages (say that 5 times fast) here. Simply extract these files, send them to PN, and install them using the package manager. You can also patch it yourself by looking at Maximilian's compile_mesa.sh.

Note: If you frequently update your system with pacman -Syu, you will end up updating these packages and losing the patches. Add this line to your /etc/pacman.conf to prevent them from being updated:
IgnorePkg = libva-mesa-driver mesa mesa-debug mesa-vdpau opencl-mesa vulkan-mesa-layers vulkan-broadcom vulkan-panfrost vulkan-radeon vulkan-swrast

10. To ensure the GPU stays on, we need to use Maximilian's mweigand_eglinfo.service. The Readme.md in that same directory has instructions for how to install this, but basically we need to copy it to /etc/systemd/system/, run sudo systemctl daemon-reload to make sure systemd knows it exists, then execute sudo systemctl enable mweigand_eglinfo.service.

Next steps

Configuring the driver

The driver has several options that can improve performance. These can be read about here. rockchip_ebc.bw_mode=1 rockchip_ebc.default_waveform=1 rockchip_ebc.refresh_threshold=30 rockchip_ebc.auto_refresh=1 may be used to make the image lower quality, but much faster to update. The auto_refresh setting is also essential to clear ghosting which will otherwise accrue on screen. The APPEND line in the extlinux.conf might be added to make sure they are applied on boot.

Fixing suspend

If you're using a logind system, edit your /etc/systemd/logind.conf config. More information on what to do in Arch's documentation.

Configuring your apps

See this page.

Booting Linux instead of Android

PineNote Development/Booting Linux

Fixing Bluetooth

See PineNote Development/Software Tweaks