Re: [PATCHv5 0/5] media: uvcvideo: implement UVC 1.5 ROI

[Hans Verkuil]

On 01/06/2021 10:46, Sergey Senozhatsky wrote:
> On (21/05/26 12:38), Hans Verkuil wrote:
>> Hi Sergey,
>>
>> On 01/05/2021 10:19, Sergey Senozhatsky wrote:
>>> Hello,
>>>
>>> 	This patch set implements UVC 1.5 ROI using v4l2_selection API.
>>>
>>> v5:
>>> -- fixed UAPI typo: STABILIXATION
>>> -- moved V4L2_CID_REGION_OF_INTEREST_AUTO to V4L2_CID_CAMERA_CLASS_BASE+36
>>> -- added more comments (Ricardo)
>>> -- added V4L2_CID_REGION_OF_INTEREST_AUTO to v4l2_ctrl_get_name() (Ricardo)
>>>
>>> Sergey Senozhatsky (5):
>>>   media: v4l UAPI: add ROI selection targets
>>
>> As mentioned in my reply to v4 0/5, I am quite strongly opposed to using the
>> Selection API for this as opposed to using controls. Unless someone can provide
>> strong arguments for using the Selection API, I am inclined to reject this.
>>
>> Sorry about that, I probably should have been reviewing this series sooner.
> 
> Hans, any suggestions regarding the UVCs GET_CUR, GET_DEF, GET_MIN/MAX
> requests handling?
> 

Support for current value and default value is already present in the control
framework (V4L2_CTRL_WHICH_CUR_VAL and V4L2_CTRL_WHICH_DEF_VAL). MIN/MAX support
would have to be added by creating V4L2_CTRL_WHICH_MIN/MAX_VAL defines and
implementing this in the control framework, pretty much along the same lines
as the DEF_VAL support. Should be quite easy.

Regards,

	Hans