drm: rz-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.

Based on similar work done by Laurent Pinchart for R-Car DU.
commit db5be3a7d6 ("drm: rcar-du: Ensure correct suspend/resume
ordering with VSP")

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260330144651.817338-1-tommaso.merciai.xr@bp.renesas.com
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>

...

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Tommaso Merciai 2026-03-30 16:46:47 +02:00 • committed by Biju Das

parent 3e9a1da270

commit c94e765abb

2 changed files with 18 additions and 0 deletions

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16

drivers/gpu/drm/renesas/rz-du/rzg2l_du_vsp.c

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2

drivers/gpu/drm/renesas/rz-du/rzg2l_du_vsp.h

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