mntmn, a handful of people ordered the imx8mplus module for mnt reform (not pocket) and it was blocked on the display pipeline not working anymore (mysterious). here are some pix of the stages of fixing it today...
then i only had a black image. marek vasut pointed me to recent driver changes to samsung dsim and a relative of our ti dsi/edp bridge. adjusting dsi_mode flags resulted in a glitchy picture
cyberpunk aesthetic (but unusable)
finally, the solution was to slightly downclock lcdif's pixelclock to slow down the dsi packet transmission a bit, to give it more breathing room