On Fri, Nov 15, 2013 at 02:16:11PM +0100, Thomas Richter wrote: > Hi Daniel, hi others, > > did even more experiments. I guess I understand now better. Indeed, > the trouble seems to be the watermark levels. I played more > with all that, and the real culprit seems to be the FW_BLC register > controlling the watermarks. > > On the i830 with the current settings, it is defined to be 0x1080304 > which sets the watermark a bit too low. If I set it to > 0x1080306 instead, I get a stable display in all panning positions > (hurray!). > > I would like to fix this, but I guess I would need to understand the > logic a little bit better. At the time being, you probably better > put the linear frame buffer workaround on hold, it looks I really > got something here. Gosh, should have read the code more closely. We have a totally botched wm setup on i830M - the watermark code for the 2nd pipe is just not there! I'll try to wip up a patch to fix this. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
