mirror of
https://github.com/NixOS/nixos-hardware
synced 2024-11-18 08:59:41 +01:00
124 lines
5.2 KiB
Markdown
124 lines
5.2 KiB
Markdown
# NOTE: Structure changes from 2023-01-10
|
|
|
|
Please read the [Deprecated Behaviour README](./OLD-BEHAVIOUR-DEPRECATION.md) to understand how some structural changes to
|
|
the code might affect you!
|
|
|
|
# Derivations for Microsoft Surface notebooks
|
|
|
|
These derivatives use the patches from the [linux-surface repo](https://github.com/linux-surface/linux-surface/tree/master/patches).
|
|
|
|
## Importing
|
|
|
|
By preference, there will already be a specialised module for your model's configuration.
|
|
e.g. The `microsoft/surface/surface-go` module configures for the Surface Go.
|
|
|
|
If not, the `microsoft/surface/common/` module can also be imported directly, and the options
|
|
provided can be used in your own system's configuration.
|
|
|
|
Alternatively, you can create a new specialisation for your model under `microsoft/surface`
|
|
configured for that model.
|
|
|
|
## Common Modules
|
|
|
|
Most shared / common modules are under the [`common/`](./common/) directory.
|
|
This includes the patched kernel build modules, as well as tools and service like `IPTSd` and `surface-control`.
|
|
|
|
### Kernel
|
|
|
|
The kernel needs several patches to make it work correctly with some of the hardware on various
|
|
Surface models, e.g. keyboard/trackpad, camera, wifi.
|
|
|
|
Not all hardware is fully supported, but the
|
|
[linux-surface feature matrix](https://github.com/linux-surface/linux-surface/wiki/Supported-Devices-and-Features#feature-matrix)
|
|
provides details on which devices are supported on which types of machine.
|
|
|
|
The kernel-specific derivations are under the [`common/kernel/`](./common/kernel/) sub-directory.
|
|
In order to simplify maintenance of the Nix code, only the most-recent kernel patch-set is expected
|
|
to be maintained in this repo.
|
|
|
|
_*NOTE:*_ Some built-in Kernel config items need to be set, that aren't set by default:
|
|
- https://github.com/linux-surface/surface-aggregator-module/wiki/Testing-and-Installing
|
|
|
|
### Support Tools
|
|
|
|
### IPTS
|
|
|
|
Enable this with the `microsoft-surface.ipts.enable = true;` config option.
|
|
|
|
IPTS is used on most of the Surface range, except for Surface Go and Surface Laptop 3 (AMD version).
|
|
|
|
Older kernels used specialised firmware which used a method that's no longer supported by the
|
|
more-recent kernels.
|
|
|
|
Newer kernels use the kernel-space `intel-precise-touch` driver and user-space `ipstd` daemon.
|
|
|
|
The `iptsd` daemon works with the `intel-precise-touch` driver to convert raw touch data from the
|
|
kernel-space driver into events for the HID / input sub-system.
|
|
|
|
- https://github.com/linux-surface/iptsd
|
|
- https://github.com/linux-surface/intel-precise-touch
|
|
- _*NOTE:*_ The patches from this repo are included in the above kernel patches, already.
|
|
|
|
### DTX, `surface-control`
|
|
|
|
#### surface-control
|
|
|
|
Enable this with the `config.microsoft-surface.surface-control.enable = true;` config option.
|
|
|
|
For controlling the performance modes and other aspects of the device, the [`surface-control`](https://github.com/linux-surface/surface-control) tool is included.
|
|
|
|
To be able to control the performance mode without using `sudo`, add your user to the `surface-control` group.
|
|
|
|
## Firmware and Drivers
|
|
|
|
### WiFi on Surface Go
|
|
|
|
For the Surface Go, please see the "Issues" sections below.
|
|
|
|
Including the [`microsoft/surface/surface-go/firmware/ath-10k/`](./surface-go/firmware/ath-10k/)
|
|
module will replace the default firmware with the updated firmware.
|
|
|
|
# ToDo's Not Done
|
|
|
|
See: [TODO.org](./TODO.org)
|
|
|
|
# Issues
|
|
|
|
## TLP daemon
|
|
|
|
TLP is known to cause problems on Surface unless correctly configured.
|
|
See: https://github.com/linux-surface/linux-surface/blob/master/README.md
|
|
|
|
## Wifi Firmware for Surface Go
|
|
|
|
On the Surface Go, the standard firmware from the official Linux Firmware repo has issues with the
|
|
`ath10k` QCA6174 Wifi device.
|
|
You will see messages like "Can't ping firmware".
|
|
|
|
The most effective fix to-date is to remove the `board-2.bin` file or replace it with a copy of the
|
|
`board.bin` file.
|
|
|
|
The derivative in `surface-go/firmware/ath10k/` can configure this, with the
|
|
`config.hardware.microsoft-surface.firmware.surface-go-ath10k.replace = true` config option.
|
|
|
|
_*NOTE:*_ This is destructive, as it deletes all the `board.bin` and `board-2.bin` files for the
|
|
`ath10k` QCA6174 device, and replaces them with KillerNetworking's version.
|
|
This is the only way (currently) to force the driver to use the new firmware.
|
|
|
|
For more details, see: https://github.com/linux-surface/linux-surface/wiki/Surface-Go#wifi-firmware
|
|
|
|
_*NOTE:*_ There's some work to patch the kernel to make it easier to override which firmware file
|
|
to use for QCA6174, which would obviate this more-destructuve approach:
|
|
- https://github.com/linux-surface/kernel/commit/22ef83836c4aa89e9eb98de9b47ed24b6c2a1d45
|
|
|
|
_*NOTE:*_ There was an attempt to get this firmware incorporated into the aggregate `board-2.bin`,
|
|
but (as of this writing) the request appears to have been ignored:
|
|
- https://github.com/linux-surface/linux-surface/issues/41
|
|
|
|
References:
|
|
- https://github.com/jakeday/linux-surface/issues/441
|
|
- https://www.reddit.com/r/SurfaceLinux/comments/e8quqg/surface_go_official_wifi_fix/
|
|
- https://hackmd.io/@dasgeek/ryA5i5Dor
|
|
- https://github.com/thebitstick/surfacego-wifi
|
|
- https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/ath10k
|
|
- https://wireless.wiki.kernel.org/en/users/drivers/ath10k/firmware
|