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Date: Thu, 24 Feb 2011 19:45:13 +0900
From: "Kim, HeungJun" <riverful.kim@samsung.com>
Subject: [RFC PATCH 0/2] v4l2-ctrls: add new focus mode
To: "linux-media@vger.kernel.org" <linux-media@vger.kernel.org>,
	"kyungmin.park@samsung.com" <kyungmin.park@samsung.com>
Cc: Hans Verkuil <hverkuil@xs4all.nl>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Sylwester Nawrocki <s.nawrocki@samsung.com>
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Hello,

I faced to the absence of the mode of v4l2 focus for a couple of years.
While dealing with some few morebile camera sensors, the focus modes
are needed more than the current v4l2 focus mode, like a Macro &
Continuous mode. The M-5MOLS camera sensor I dealt with, also support
these 2 modes. So, I'm going to suggest supports of more detailed
v4l2 focus mode.
 
This RFC series of patch adds new auto focus modes, and documents it.

The first changes the boolean type of V4L2_CID_FOCUS_AUTO to menu type,
and insert menus 4 enumerations: 

V4L2_FOCUS_AUTO, 
V4L2_FOCUS_MACRO, 
V4L2_FOCUS_MANUAL, 
V4L2_FOCUS_CONTINUOUS

The recent mobile camera sensors with ISP supports Macro & Continuous Auto
Focus aka CAF mode, of course normal AUTO mode, even Continuous mode.
Changing the type of V4L2_CID_FOCUS_MODE, is able to define more exact
focusing mode of camera sensor.

The second changes let the previous drivers using V4L2_CID_FOCUS_AUTO by
boolean type be able to use the type of menu.

Thanks for reading this, and I hope any ideas and any comments.

Regards,
Heungjun Kim