[ashlar]

I'd like to see a dev chime in here. From what was described back then, I don't understand how disabling this could improve performance. Even more so when video playback performance is mentioned as being influenced.

Furthermore, if this would be the case (I'm not saying it isn't, OP has clearly devoted some time to reason this out), it would be interesting to know which GPUs (not just SOCs) would benefit from disabling dirty region detection.