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This is a pretty simple improvement that allows to find encoder as the one and only (ARC PGU doesn't support more than one) endpoint instead of using non-standard "encoder-slave" property. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Alexey Brodkin <Alexey.Brodkin@synopsys.com> Link: https://patchwork.freedesktop.org/patch/msgid/CY4PR1201MB0120FDB10A777345F9C27720A1C90@CY4PR1201MB0120.namprd12.prod.outlook.com