How to better understand and reverse-engineer system calls within processes given a specific example

I am very new to linux and as such would appreciate any pointers with respect to understanding system calls and having the ability, knowledge and tools to reverse-engineer their origin or their process flow. As the title suggests, i present an example, being my analysis of an Xorg process that i traced in my linux desktop environment. As such, i am attempting to understand the process flow of DRM_IOCTL calls, in this case a specific DRM_IOCTL_CURSOR2 system call that takes place within the process. My goal is to understand what triggers this call within this desktop environment, or rather what steps I can take in general to investigate inquiries like this From my limited understanding I am aware that Xorg is spawned as a subprocess of SDDM but aside from initiating the Xorg server, I am at a blank in trying to figure out how to walk through the process and identify triggers for certain process calls or perhaps the use of tools to do so. As such this is a conceptual question on how to approach analyses such as this in general. Would this require specific knowledge of the process at hand and its architecture. Would there be any general approaches I can take on my system to trace systemcalls much like deducing ppids of processes for my own interest. As of now I have vague familiarity using tools like strace, bpftrace and general command line tools like ps & lsof. Apologies if this is a broad question, if so I will be happy to narrow it further