There is no official "central" website for these generic universal boards, as they are often manufactured by third-party OEMs. Instead, you will need to search specifically for your board sticker.
Finding and installing the correct firmware for this chip is the difference between a functional display and a "brick." In this guide, we’ll break down what this firmware does, how to find the right version, and how to flash it safely. What is the TSUMV29LU? tsumv29lu firmware
Since MStar does not provide firmware directly to consumers, you must rely on community archives. Popular sources include: Technical Write-Up: TSUMV29LU Firmware There is no official
The development of TSUMV29LU firmware requires a range of tools and software: Official Documentation: support