It looks like when I went to add the interlaced bits, I just took the
existing PV_VERT* block and indented it, instead of copy and pasting
it first.  Without this, changing resolution never worked.
Signed-off-by: Eric Anholt <eric@anholt.net>
                                 PV_HORZB_HFP) |
                   VC4_SET_FIELD(mode->hdisplay, PV_HORZB_HACTIVE));
 
+       CRTC_WRITE(PV_VERTA,
+                  VC4_SET_FIELD(mode->vtotal - mode->vsync_end,
+                                PV_VERTA_VBP) |
+                  VC4_SET_FIELD(mode->vsync_end - mode->vsync_start,
+                                PV_VERTA_VSYNC));
+       CRTC_WRITE(PV_VERTB,
+                  VC4_SET_FIELD(mode->vsync_start - mode->vdisplay,
+                                PV_VERTB_VFP) |
+                  VC4_SET_FIELD(vactive, PV_VERTB_VACTIVE));
+
        if (interlace) {
                CRTC_WRITE(PV_VERTA_EVEN,
                           VC4_SET_FIELD(mode->vtotal - mode->vsync_end - 1,