[PROPOSAL] Mainline synaptics touchscreen driver


Bird, Tim <Tim.Bird@...>
 

(For the benefit of Christopher and Dmitry, who are CC'ed and might not
know what this is all about - the CE Workgroup of the Linux Foundation
periodically funds contract work for items of interest to member companies
or the industry in general. This is one such proposal, by Sony Mobile.
Please contact me individually if you have questions about this process
or this proposal, or see http://elinux.org/CEWG_Open_Project_Proposal_2013
for details.)

; Summary: Mainline synaptics touchscreen driver
; Proposer: Tim Bird, Sony Mobile

== Description ==
The synaptics touchscreen is used in many embedded project, particularly
phones and tablets. However, it does not have a driver in mainline.
This project would consist of mainlining it (submitting the driver
and responding to community requests for enhancements.)

The driver has been submitted a number of times previously, so code
is available, and many former issues have been addressed. This work was
submitted in late 2012 by Christoper Heiny (a developer at Synaptics).
Possibly, Synaptics engineers could assist with this effort.

Because there was not much resistance on the last submission attempt,
it is possible this just fell through the cracks, and just needs a slight
push to get it upstream. Or, there might be bigger issues.

It appears that the code was been accepted into Dmitry Korokhov's tree, but
not progressed past that point, as of Jan 2013. Part of this project
would be investigating why the code stalled, and resolving any outstanding
issues to Dmitry's satisfaction.

== Related work ==
* May 2010 lkml submission: http://lwn.net/Articles/389931/
* June 2011 lkml submission: http://lwn.net/Articles/449981/
* Nov 2012 lkml submission: http://lwn.net/Articles/525557/
* Jan 2013 changes: http://lwn.net/Articles/533550/
** The patch set is sitting in Dmitry Torokhov's tree at: https://git.kernel.org/cgit/linux/kernel/git/dtor/input.git/log/?h=synaptics-rmi4

== Scope ==
It is notoriously difficult to estimate the time it takes to mainline something.
Given the comments on the most recent submittal, however, this driver looks like
it is pretty close. I would estimate 4 person-weeks.

== Contractor Candidates ==
None yet.

== Comments ==

[[Category:Project proposals 2013]]

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