On Mon, Oct 10, 2022 at 11:37:37AM +0200, Thomas Zimmermann wrote: > Hi > > Am 07.10.22 um 14:49 schrieb Thierry Reding: > > From: Thierry Reding <treding@xxxxxxxxxx> > > > > In order to support framebuffers residing in system memory, allow the > > memory-region property to override the framebuffer memory specification > > in the "reg" property. > > What happens if both properties are present and they disagree with each > other? > > I understand that the framebuffer is behind 'memory-region', but does 'reg' > still contain device memory? Do we need to acquire ownership from within > the driver? The intention is for both memory-region and reg properties to be mutually exclusive. I can't think of a scenario where you would need or want both. Note also the documentation for the memory-region property: | memory-region: | maxItems: 1 | description: Phandle to a node describing the memory to be used for the | framebuffer. If present, overrides the "reg" property (if one exists). Thierry
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