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 <fshao@xxxxxxxxxxxx>
---
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
