On Wed, Mar 30, 2022 at 10:06:24PM +0800, Jiaxin Yu wrote: > On Wed, 2022-03-30 at 13:30 +0100, Mark Brown wrote: > > Making a previously optional property required means that systems > > that > > previously worked may stop working unless they update their DT, DTs > > may > > be distributed separately to the kernel and perhaps even baked into > > firmware or similar. > Thank you for your detailed answer. I should keep the driver's behavior > consistent with the description of dt-bindings. The "mediatek,hdmi- > codec" needs to be set as the required property. Is my understanding > right? The binding document and code should match so if one is changed the other needs to be changed too. In theory we should never change a previously optional property to required which would mean that the code should be updated to reflect the binding document, however sometimes the DT isn't actually used as a stable intereface by anything for a given property or device type so we can get away with changing things.
Attachment:
signature.asc
Description: PGP signature
