If pp autorefresh is up (from bootloader splash), we will surely get
vblank and pp timeouts.  Ensure it is turned off.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: NMarijn Suijten <marijn.suijten@somainline.org>
Link: https://lore.kernel.org/r/20210406214726.131534-4-marijn.suijten@somainline.orgSigned-off-by: NRob Clark <robdclark@chromium.org>