lkml.org 
[lkml]   [2011]   [Nov]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH 0/3] introduce: Multistate Switch Class
On Wed, Nov 30, 2011 at 11:17:41PM +0000, Mark Brown wrote:
> On Thu, Dec 01, 2011 at 09:56:33AM +1100, NeilBrown wrote:
> > On Wed, 30 Nov 2011 15:40:48 +0900 MyungJoo Ham <myungjoo.ham@gmail.com>
> > wrote:
>
> > > I'm focusing on an external connector or port that each physical port
> > > may inhabit multiple cables at a time although it should support a
> > > port that may inhabit a single cable only at a time. However, the
> > > class could be used for other general "multistate mux" that connects
> > > different device drivers.
>
> > maybe I'm just slow, but I'm having a lot of trouble imagining a single port
> > that could have multiple cables plugged in at the same time. And this
> > blockage is stopping me from reflecting usefully on your other points.
>
> > Are you able to show me a picture or a diagram or something so I can
> > visualise what you are talking about?
> > To me: once you plug one cable into a port, it is full and there is no room
> > for any more cables.
>
> One obvious example is the sort of big multi-way docking connector that
> many mobile devices have (iPod and friends being one of the most
> common). These are essentially the same as docking station connections
> on a laptop in terms of what they bring out - a variety of audio, video
> and communication connections - which may go to a docking station or
> some kind of breakout or adaptor cable and may have sub-ports hanging
> off them (eg, it's common for tablets to have docking stations with HDMI
> and audio sockets on them).
>
> There are also lower pin count equivalents like the multiplexed "USB"
> sockets on some phones which can also carry other functions with
> adaptors, and even something like a headset is really a microphone and
> headphones on a single jack.

Physical jack does not have to map 1:1 on logical jack. So 1 physical
docking connector can be represented by 1 logical video connector, line
in, line out, microphone and maybe else.

--
Dmitry


\
 
 \ /
  Last update: 2011-12-01 00:29    [W:0.129 / U:0.972 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site