Difference between revisions of "Tegra/Mainline SW/Linux kernel"
< Tegra | Mainline SW
m (Transform list of mainline features into a table) |
(Add some tested tegra20 mainline features) |
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| CPU frequency scaling || YES || ? || ? || ? | | CPU frequency scaling || YES || ? || ? || ? | ||
| + | |- | ||
| + | | CPU Thermal sensors || YES || ? || ? || ? | ||
|- | |- | ||
| I2C master || YES || YES || YES || YES | | I2C master || YES || YES || YES || YES | ||
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| USB 2.0 Host || YES || YES || YES || YES | | USB 2.0 Host || YES || YES || YES || YES | ||
| + | |- | ||
| + | | USB2 Device/OTG || YES || ? || ? || ? | ||
|- | |- | ||
| RGB/LVDS Display || YES || YES || ? || ? | | RGB/LVDS Display || YES || YES || ? || ? | ||
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| PCIe || YES || YES || ? || ? | | PCIe || YES || YES || ? || ? | ||
| + | |- | ||
| + | | I2S Audio || YES || ? || ? || ? | ||
| + | |- | ||
| + | | PWM || YES || ? || ? || ? | ||
| + | |- | ||
| + | | NAND || YES || ? || ? || ? | ||
|} | |} | ||
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* USB3 controller. Andrew Bresticker is working on this. | * USB3 controller. Andrew Bresticker is working on this. | ||
* SATA. | * SATA. | ||
| − | |||
* SKU awareness (SKU-specific clock and thermal limits). | * SKU awareness (SKU-specific clock and thermal limits). | ||
* POR (Plan Of Record) clocks. | * POR (Plan Of Record) clocks. | ||
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* EMC (memory controller) frequency scaling. | * EMC (memory controller) frequency scaling. | ||
* DVFS (Dynamic Voltage and Frequency Scaling). | * DVFS (Dynamic Voltage and Frequency Scaling). | ||
| − | |||
* USB2 bus power saving. | * USB2 bus power saving. | ||
* I2C slave support. The Toshiba AC100 NVEC driver could be generalized to provide this. | * I2C slave support. The Toshiba AC100 NVEC driver could be generalized to provide this. | ||
Latest revision as of 07:21, 17 August 2022
NVIDIA Tegra SoCs are well supported by mainline kernels.
Kernel releases may be obtained from:
- https://www.kernel.org/ releases, via download.
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/ releases, via git.
- https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/ absolute latest development code, via git.
The following mainline kernel releases introduced support for Tegra SoCs:
- Tegra20 has been upstream for many years.
- Tegra30 support was added in v3.3.
- Tegra114 support was added in v3.9.
- Tegra124 support was added in v3.13.
The first kernel release to support a given SoC has historically contained extremely minimal support. One or two kernel releases later will typically be the first useful version.
Features that already work are:
| Function | Tegra20 | Tegra30 | Tegra114 | Tegra124 |
|---|---|---|---|---|
| It boots! | YES | > v3.3 | > v3.9 | > v3.13 |
| Serial console | YES | YES | YES | YES |
| CPU hotplug | YES | YES | YES | YES |
| CPU frequency scaling | YES | ? | ? | ? |
| CPU Thermal sensors | YES | ? | ? | ? |
| I2C master | YES | YES | YES | YES |
| Regulators | YES | YES | YES | YES |
| SPI | YES | YES | YES | YES |
| SD/eMMC | YES | YES | YES | YES |
| USB 2.0 Host | YES | YES | YES | YES |
| USB2 Device/OTG | YES | ? | ? | ? |
| RGB/LVDS Display | YES | YES | ? | ? |
| DSI Display | ? | ? | YES | ? |
| eDP Display | ? | ? | ? | YES |
| HDMI Display | YES | YES | YES | YES |
| PCIe | YES | YES | ? | ? |
| I2S Audio | YES | ? | ? | ? |
| PWM | YES | ? | ? | ? |
| NAND | YES | ? | ? | ? |
A probably-incomplete list of features that are not yet implemented is:
- Kepler GPU support via Nouveau (work in progress).
- Advanced (high-speed) transfer modes for SD and eMMC. IO voltage scaling.
- PCIe on Tegra124. Thierry Reding is working on this.
- USB3 controller. Andrew Bresticker is working on this.
- SATA.
- SKU awareness (SKU-specific clock and thermal limits).
- POR (Plan Of Record) clocks.
- cpufreq for SoCs other than Tegra20.
- EMC (memory controller) frequency scaling.
- DVFS (Dynamic Voltage and Frequency Scaling).
- USB2 bus power saving.
- I2C slave support. The Toshiba AC100 NVEC driver could be generalized to provide this.
- SPI slave support?
