drm: rcar-du: Ensure correct suspend/resume ordering with VSP

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The VSP serves as an interface to memory and a compositor to the DU. It
therefore needs to be suspended after and resumed before the DU, to be
properly stopped and restarted in a controlled fashion driven by the DU
driver. This currently works by chance. Avoid relying on luck by
enforcing the correct suspend/resume ordering with device links.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Reviewed-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260323164526.2292491-2-laurent.pinchart+renesas@ideasonboard.com
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

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Laurent Pinchart 2026-03-23 18:45:23 +02:00 • committed by Tomi Valkeinen

parent d37690b5e0

commit db5be3a7d6

2 changed files with 18 additions and 0 deletions

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16

drivers/gpu/drm/renesas/rcar-du/rcar_du_vsp.c

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2

drivers/gpu/drm/renesas/rcar-du/rcar_du_vsp.h

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