2012/1/16 Dave Airlie <airlied at gmail.com>: > > Okay I must have missed the bit where you explain why a connector > property isn't used?
The registers that contain the rotation information are the pipe registers and, as far as I understood, each pipe is associated with only one crtc. We can have more than one connector associated with one crtc. So, in a case where we have two different connectors associated with the same crtc, we would have to keep synchronizing the property value between the two connectors: this doesn't sound like the best solution and it could also create confusion (imagine the case where connectors A and B are associated with the same crtc, and you set connector_a.rotation to 0 and then connector_b.rotation to 180, then you'll read connector_a.rotation and it will be 180, not what you just set). (and by the way, the three patches were sent just to dri-devel@) -- Paulo Zanoni
