On Fri, Nov 20, 2015 at 10:09:18PM +0200, ville.syrjala@xxxxxxxxxxxxxxx wrote: > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > We still get spurious pipe underruns on ILK/SNB/IVB under two > circumstances when dealing with PCH ports: > * When the pipe has been disabled, but FDI RX/TX is still enabled > * During FDI link training > > Both cases seem to happen at least when we do VGA+HDMI cloning > from the same pipe. I don't think I've seen them when not cloning, > but can't be 100% sure. > > Disable underrun reporting around those places to eliminate the > dmesg errors. > > Testcase: igt/kms_setmode/basic-clone-single-crtc > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Acked-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> I wondered if logging the suppressed errors would be of any use? Does the check_cpu_fifo work if the reporting is disabled? Could we do a manual check and DRM_DEBUG_KMS() if the enable did generate a failure. If the check_cpu_fifo does work, won't we still get the error from the added check in atomic_commit()? -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
