Hi Robert, On Tue, Jun 18, 2019 at 10:31 AM Robert Chiras <robert.chiras@xxxxxxx> wrote: > +static const struct display_timing rad_default_timing = { > + .pixelclock = { 66000000, 132000000, 132000000 }, > + .hactive = { 1080, 1080, 1080 }, > + .hfront_porch = { 20, 20, 20 }, > + .hsync_len = { 2, 2, 2 }, > + .hback_porch = { 34, 34, 34 }, > + .vactive = { 1920, 1920, 1920 }, > + .vfront_porch = { 10, 10, 10 }, > + .vsync_len = { 2, 2, 2 }, > + .vback_porch = { 4, 4, 4 }, Are you sure that the sync_len and porch parameters are the same for both 66MHz and 132MHz?