[PATCH] drm/rockchip: vop2: give rk3576 VP2 a primary plane

[Tomonori Nakagawa]

On 2026/07/30 10:56, Chaoyi Chen wrote:
 > The description here is not accurate. VP2 can wire to different
 > display interfaces which depending on your board configuration.

You're right, thanks. VP2 isn't tied to DP - the VP-to-interface
routing is board/DT dependent. The actual issue is the plane topology:
on rk3576 the two Cluster windows (the only DRM_PLANE_TYPE_PRIMARY
windows) both have possible_vp_mask = BIT(0) | BIT(1), so they can only
attach to VP0/VP1. VP2's only attachable windows are the Esmart ones,
which are all DRM_PLANE_TYPE_OVERLAY. So whenever a board's DT wires any
output to video_port2, vop2_create_crtcs() finds no primary plane for it
and fails with -ENOENT ("no primary plane for vp 2").

I'll reword the commit message accordingly (dropping the DP framing) in
a v2. Does the fix itself - promoting Esmart0 to PRIMARY - look
acceptable, or would you prefer a different window or a driver-side
approach for VP2's primary?