TQMa8MxNL - YOCTO Linux BSP documentation

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