Re: [RFC] How to pass camera Orientation to userspace

[Hans de Goede <hdegoede@redhat.com>]

Trent Piepho wrote:
> On Sun, 22 Feb 2009, Hans de Goede wrote:
>> Yes that is what we are talking about, the camera having a gravity switch
>> (usually nothing as advanced as a gyroscope). Also the bits we are talking
>> about are in a struct which communicates information one way, from the camera
>> to userspace, so there is no way to clear the bits to make the camera do something.
> 
> First, I'd like to say I agree with most that the installed orientation of
> the camera sensor really is a different concept than the current value of a
> gravity sensor.  It's not necessary, and maybe not even desirable, to
> handle them in the same way.
> 
> I do not see the advantage of using reserved bits instead of controls.
> 
> The are a limited number of reserved bits.  In some structures there are
> only a few left.  They will run out.  Then what?  Packing non-standard
> sensor attributes and camera sensor meta-data into a few reserved bits is
> not a sustainable policy.
> 
> Controls on the other card are not limited and won't run out.
> 

Yes but these things are *not* controls, end of discussion. The control API is 
for controls, not to stuff all kind of cruft in.

Regards,

Hans