On Tue, Oct 09, 2012 at 10:40:26AM -0700, ron minnich wrote: > I have a display that is, e.g., 2560x1600 on an ivybridge. I'd like to > set it up so that the software sees a display with half that > resolution, i.e. the software that draws into the frame buffer (this > is a bios) can draw into what it sees as a 1280x800 display. > > I've tried a few things but I'm realizing I don't understand the > ivybridge panel fitter at all. This display is on PIPEA. It appears on > sandybridge one can write > PFA_VSCALE, PFA_HSCALE, PFA_WIN_SZ, and PFA_WIN_POS and _PFA_CTL_1 and > it all works. > > On Ivybridge it seems far more complex. Or am I missing something? I > don't see any fitting code in the drm driver itself, so I'm not quite > sure how it's done. > > Thanks in advance, as always. The panel fitter should work the same on ivb as on snb I think. We only expose it for integrated panels though, and if the mode you want is missing you first need to add it. But it should all work ... -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
