On Thu, Jan 22, 2026 at 02:03:25PM +0800, Jun Nie wrote: > Dmitry Baryshkov <[email protected]> 于2026年1月21日周三 17:30写道： > > > > On Wed, Jan 21, 2026 at 04:01:51PM +0800, Jun Nie wrote: > > > Currently, plane splitting and SSPP allocation occur during the plane > > > check phase. Defer these operations until dpu_assign_plane_resources() > > > is called from the CRTC side to ensure the topology information from > > > the CRTC check is available. > > > > Why is it important? What is broken otherwise? > > I see. Thanks! Will add below lines in next version. > > By default, the plane check occurs before the CRTC check. > Without topology information from the CRTC, plane splitting > cannot be properly executed. Consequently, the SSPP > engine starts without a valid memory address, which triggers > an IOMMU warning.
What is plane splitting? Write commit message for somebody who doesn't exactly know what is going on. -- With best wishes Dmitry
