On Tue, 30 Oct 2018 16:12:55 -0700 Eric Anholt <eric@xxxxxxxxxx> wrote: > > + /* Even if the bandwidth/plane required for a single frame is > > + * > > + * vc4_state->src_w[i] * vc4_state->src_h[i] * cpp * vrefresh > > + * > > + * when downscaling, we have to read more pixels per line in > > + * the time frame reserved for a single line, so the bandwidth > > + * demand can be punctually higher. To account for that, we > > + * calculate the down-scaling factor and multiply the plane > > + * load by this number. We're likely over-estimating the read > > + * demand, but that's better than under-estimating it. > > + */ One more thing: because we sometimes over estimate the load, we might reject configuration that were previously accepted, so I'm wondering if we shouldn't make the 'reject on HVS/membus load too high' optional, and disable it by default. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
