2012/10/9 ron minnich <rminnich at gmail.com>: > 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. Take a look at this tool: http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/tree/tools/intel_panel_fitter.c It's not guaranteed to work, but it may serve as a starting point for your implementation. > > Thanks in advance, as always. > > ron > _______________________________________________ > Intel-gfx mailing list > Intel-gfx at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Paulo Zanoni
