TQMa8MxNL - YOCTO Linux BSP documentation

Known Issues

Known Issues BSPs

Known Issues scarthgap.TQ.ARM.BSP.0011

  • FlexSPI: the configured clock exceeds the limit given in datasheet

    When using without DQS internal clock, delay limits the maximum usable speed to 66MHz. The interface is configured with a limit of 80MHz.

  • U-Boot:

    • USB is limited to device mode in favour of SDP

  • Linux: operating points for DDR controller missing in device tree. running at lower DDR frequencies does not work in this version of BSP.

  • LVDS shows wrong colors on older Tianma display kit (HW issue on older display kit revisions)

  • Mikrobus Modul RTC5 on ecspi1 don't answer

  • Audio does not work after suspend / resume (clocking problem)

  • MIPI CSI

    • driver stack is not completely v4l2-compliance test proof. The IOCTLS for format / resolution enumeration and query can return invalid / wrong values depending of the internal state of the driver stack. Please follow given examples for a working setup.
    • IMX327: bayer support with 12 Bit does not work at the moment, only 10 Bit with 1280x720 is tested with gstreamer
    • IMX327: when configuring to SRGGB12 reboot may be needed to get a working capture again
    • OV9281: gstreamer: capture not starting out of the box, need to use yavta to capture some frames, gstreamer starts afterwards