HCL:Teres-I

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The Teres-I is a 64bit ARM based laptop created with KiCAD, and being sold as a kit with full OSHW documentation.

Technical data

  • Allwinner A64 SoC
    • 4x ARM Cortex-A53 CPU @ 1.2 GHz
    • ARM Mali-400 MP2 GPU
    • Video Engine (H.264 En/Decode, H265 Decode)
  • 1366x768 LCD
  • HDMI 1.4 Port (FullHD @ 60 FPS, 4K @ 30 FPS)
  • 2 GiB RAM
  • internal 16 GB eMMC, +1 µSD slot
  • 2x USB 2.0
  • BlueTooth / WiFi using an RTL8723bs combo chip
  • built-in microphone and stereo speakers
  • 3.5mm 4-contact audio connector (CTIA pinout, "LRGM")
  • Camera ...

Leap 15 Support

There is a staging area for the work in progress in OBS

-- Caveats --

There is no automated image creation yet. Things to watch out for when doing this manually:

  • shorten the GPT
    The A64 reads its SPL from absolute address 0x2000 (8kiB) from the (e)MMC. A GPT with only 56 entries will end just before that point, and a partition starting there and extending to 1MiB is the perfect place for u-boot-sunxi-with-spl.bin .
  • modify U-Boot environment once installed
    The USB keyboard is slow to come up, and the audio jack is connected to the serial console by default. Add
 usb stop; usb start;

and

 gpio set PL9

somewhere in the flow of automatically executed scripts.

  • MMC driver loading is racy
    Occasionally mmc-blk grabs the interface of the WiFi/BT chip; make sure the rtl8723bs driver is loaded as early as possible.
  • DRI driver requires contiguous memory.
    Add
 cma=16M

to the kernel command line. Otherwise the screen will stay blank after the EFI FB has been decommissioned.

See also