Hi Andy, On Sunday, January 19, 2025 9:10:10 AM UTC Andy Yan wrote: > Hi Danq, > > Do you have tests with this u-boot video enabled then boot a linux kernel > also with drm display enabled? > Yes, I booted Linux with U-Boot VOP2 and Linux VOP2 enabled without any problem.
> Because the u-boot video been enabled with no-mmu, when it runs into linux > kernel with the window/plane you enable at u-boot stage, when linux kernel > enable the iommu, there is a moment the window will read the memory through > iommu, but the framebuffer you set in u-boot stage has not been mapped by > iommu, there is a high probability of causing an IOMMU page fault. >
