Re: [PATCH v6 1/2] media: dt-bindings: media: xilinx: Add Xilinx MIPI CSI-2 Rx Subsystem

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Hi Vishal, Sakari,

On 12/03/19 15:45, Vishal Sagar wrote:
>>> +- xlnx,en-csi-v2-0: Present if CSI v2 is enabled in IP configuration.
>>> +- xlnx,en-vcx: When present, there are maximum 16 virtual channels, else
>>> +  only 4. This is present only if xlnx,en-csi-v2-0 is present.
>>> +- xlnx,en-active-lanes: present if the number of active lanes can be
>>> +  reconfigured at runtime in the Protocol Configuration Register.
>>> +  If present, the V4L2_CID_XILINX_MIPICSISS_ACT_LANES control is added.
>>> +  Otherwise all lanes, as set in IP configuration, are always active.
>>
>> The bindings document hardware, therefore a V4L2 control name doesn't
>> belong here.
>>
> Ok. I will remove this and revert to original description as below -
> 
> xlnx,en-active-lanes: present if the number of active lanes can be
> re-configured at runtime in the Protocol Configuration Register

I'm to blame here as I suggested that text. However I still find the
original wording was ambiguous: my initial reading of it was close to
the opposite of the intended meaning. xlnx,en-active-lanes means "a
register exists to configure the active lanes at runtime" and I just
care that this is stated clearly and unambiguously.

If we cannot mention a control name here, why not just dropping it:

- xlnx,en-active-lanes: present if the number of active lanes can be
  reconfigured at runtime in the Protocol Configuration Register.
  Otherwise all lanes are always active.

-- 
Luca



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