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The Cadence DSI requires negative syncs from the incoming video signal, but at the moment that requirement is not expressed in any way. If the crtc decides to use positive syncs, things break down. Use the adjusted_mode in atomic_check to set the sync flags to negative ones. Reviewed-by: Aradhya Bhatia <aradhya.bhatia@linux.dev> Tested-by: Parth Pancholi <parth.pancholi@toradex.com> Tested-by: Jayesh Choudhary <j-choudhary@ti.com> Reviewed-by: Devarsh Thakkar <devarsht@ti.com> Link: https://lore.kernel.org/r/20250723-cdns-dsi-impro-v5-10-e61cc06074c2@ideasonboard.com Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>