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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 02/10/2024 08:16, Krzysztof Kozlowski wrote: > On Tue, Oct 01, 2024 at 07:27:21PM +0800, Fei Shao wrote: >> On MediaTek platforms with Multimedia MMU (M4U), a multimedia hardware >> can be assigned with a local arbiter (LARB) which has a maximum of 32 >> ports for MediaTek's IOMMU infrastructure. That means there can be at >> most 32 items in the iommus property in theory. >> >> Instead of relaxing the max item count every time a newly introduced >> device tree hits the limit, bump the number to 32 as an one-time effort. >> >> On the other hand, all existing and foreseeable JPEG decoder nodes at >> this point have at least 2 IOMMUs, so set minItems to 2 accordingly. >> >> Signed-off-by: Fei Shao >> --- >> It's not in the upstream tree yet, but the upcoming MT8188 DT will have >> 6 IOMMUs in its JPEG decoder. This patch is to pave the way for that. >> >> Changes in v2: >> New patch. >> > > I do not see any user of this in this patchset. > I'm not sure I understand you: the binding describes the hardware. If it can have up to 32 ports, then this should be reflected in the binding. Regards, Matthias