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Add feature support page for M4
Fixes: #154 Signed-off-by: Davide Cavalca <[email protected]>
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‎docs/Feature-Support.md‎

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- [M1 Series (M1, M1 Pro, M1 Max, M1 Ultra) Feature Support](M1-Series-Feature-Support.md)
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- [M2 Series (M2, M2 Pro, M2 Max, M2 Ultra) Feature Support](M2-Series-Feature-Support.md)
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- [M3 Series (M3, M3 Pro, M3 Max) Feature Support](M3-Series-Feature-Support.md)
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- [M4 Series (M4, M4 Pro, M4 Max) Feature Support](M4-Series-Feature-Support.md)
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A condensed feature overview for the Fedora Asahi Remix is available at [https://asahilinux.org/fedora/#device-support](https://asahilinux.org/fedora/#device-support).

‎docs/M4-Series-Feature-Support.md‎

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This page details currently supported features on all M4 series (M4, M4 Pro, M4 Max) Apple Silicon Macs, as well as
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their progress towards being upstreamed. The tables herein can be interpreted as follows:
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* **Kernel release, *e.g.* 6.0:** the feature was incorporated upstream as of this release
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* **linux-asahi (kernel release):** the feature is stable, available for use in `linux-asahi`, and should be upstream by the release indicated
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* **linux-asahi**: the feature is (mostly) stable and available for use in Fedora Asahi Remix and in `linux-asahi`
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* **asahi-edge**: the feature is (mostly) stable and available for use in Fedora Asahi Remix. For historical reason it is available in the `linux-asahi-edge` package in the linux-asahi Linux distribution
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* **WIP**: Development work on the feature is actively progressing, however is not yet ready for wider testing, use or distribution
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* **TBA**: Active work on this feature is not being undertaken at this time
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If a feature is not ready, then there is no estimation on when it will be ready. [Please do not ask for estimations in support channels (e.g. IRC)](When-will-Asahi-Linux-be-done.md).
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## Table of Contents
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- [SoC blocks](#soc-blocks)
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- [M4 devices](#m4-devices)
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- [M4 Pro/Max devices](#m4-promax-devices)
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- [Notes](#notes)
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Note that as these machines have not been released for general availability yet, supported and missing features are predictions based on what Apple has changed
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on a per-SoC and per-machine basis in the past. This page will change rapidly once work begins on support for these machines.
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## SoC blocks
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These are features/hardware blocks that are present on all devices with the given SoC.
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| | M4<br>(T8132) | M4 Pro/Max<br>(T604x) |
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|------------------|:--------------------:|:---------------------------:|
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| DCP | TBA | TBA |
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| USB2 (TB ports) | linux-asahi | linux-asahi |
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| USB3 (TB ports) | linux-asahi | linux-asahi |
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| Thunderbolt | TBA | TBA |
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| DP Alt Mode | WIP | WIP |
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| GPU | TBA | TBA |
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| Video Decoder | TBA | TBA |
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| NVMe | 5.19 | 5.19 |
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| PCIe | TBA | TBA |
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| PCIe (GE) | - | - |
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| cpufreq | 6.2 | 6.2 |
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| cpuidle | linux-asahi ([notes](#cpuidle-situation)) | linux-asahi ([notes](#cpuidle-situation)) |
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| Suspend/sleep | asahi-edge | asahi-edge |
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| Video Encoder | TBA | TBA |
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| ProRes Codec | TBA | TBA |
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| AICv3 | TBA | TBA |
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| DART | TBA | TBA |
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| PMU | TBA | TBA |
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| UART | 5.13 | 5.13 |
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| Watchdog | 5.17 | 5.17 |
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| I<sup>2</sup>C | 5.16 | 5.16 |
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| GPIO | 5.16 | 5.16 |
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| USB-PD | 5.16 | 5.16 |
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| MCA | 6.1 / 6.4 (dts) | linux-asahi |
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| SPI | linux-asahi | linux-asahi |
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| SPI NOR | linux-asahi | linux-asahi |
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| SMC | linux-asahi | linux-asahi |
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| SPMI | linux-asahi | linux-asahi |
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| RTC | linux-asahi | linux-asahi |
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| SEP | WIP | WIP |
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| Neural Engine | out of tree ([notes](#ane-driver)) | out of tree ([notes](#ane-driver)) |
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## M4 devices
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| | MacBook Pro<br>(14-inch, Nov 2024) | MacBook Pro<br>(16-inch, Nov 2024) |
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|--------------------|:-----------------------------------:|:----------------------------------:|
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| Installer | no | no |
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| Devicetree | TBA | TBA |
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| Main display | TBA | TBA |
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| Keyboard | TBA | TBA |
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| KB backlight | TBA | TBA |
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| Touchpad | TBA | TBA |
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| Brightness | TBA | TBA |
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| Battery info | TBA | TBA |
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| WiFi | TBA | TBA |
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| Bluetooth | TBA | TBA |
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| HDMI Out | TBA | TBA |
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| 3.5mm jack | TBA | TBA |
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| Speakers | TBA | TBA |
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| Microphones | TBA | TBA |
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| Webcam | TBA | TBA |
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| SD card slot | TBA | TBA |
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| TouchID | TBA | TBA |
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## M4 Pro/Max devices
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| | Mac mini<br>(2024) | MacBook Pro<br>(14-inch, Nov 2024) | MacBook Pro<br>(16-inch, Nov 2024) |
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|--------------------|:------------------:|:-----------------------------------:|:----------------------------------:|
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| Installer | no | no | no |
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| Devicetree | TBA | TBA | TBA |
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| Main display | TBA | TBA | TBA |
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| Keyboard | - | TBA | TBA |
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| KB backlight | - | TBA | TBA |
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| Touchpad | - | TBA | TBA |
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| Brightness | TBA | TBA | TBA |
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| Battery info | - | TBA | TBA |
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| WiFi | TBA | TBA | TBA |
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| Bluetooth | TBA | TBA | TBA |
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| HDMI Out | - | TBA | - |
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| 3.5mm jack | TBA | TBA | TBA |
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| Speakers | TBA | TBA | TBA |
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| Microphones | TBA | TBA | TBA |
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| Webcam | TBA | TBA | TBA |
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| SD card slot | - | TBA | - |
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| 1Gbps Ethernet | TBA | - | - |
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| 10Gbps Ethernet | - | - | - |
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| TouchID | - | TBA | TBA |
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Note: Many peripherals depend on DART and PCIe support.
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## Notes
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### cpuidle situation
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Some power management functionality on ARM machines is controlled via the PSCI interface. The
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kernel has a specific way of talking to PSCI that is not compatible with Apple Silicon, and a
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discussion is required with upstream maintainers in order to figure out the best way forward. Given
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that this discussion has failed to materialise for two years, the decision has been
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made to hack together a driver that directly calls WFI/WFE instructions in order to bring
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this functionality to Asahi Linux. This greatly improves the UX on laptops when coupled with
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energy-aware scheduling, as it resolves the issue of the machines running warm to the touch
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and significantly improves battery life. This can never be upstreamed, however the hope is
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that this hacked together driver becomes unnecessary at some point in the near future.
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### ANE driver
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An out of tree [kernel module](https://github.com/eiln/ane/tree/main) is available. It will be merged into linux-asahi.

‎mkdocs.yml‎

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- M1 Series Feature Support: M1-Series-Feature-Support.md
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- M2 Series Feature Support: M2-Series-Feature-Support.md
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- M3 Series Feature Support: M3-Series-Feature-Support.md
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- M4 Series Feature Support: M4-Series-Feature-Support.md
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- Project related:
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- Glossary: Glossary.md
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- FAQ: FAQ.md

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