[SRU[[Trusty] Synaptics HID touchpad driver

[Tim Gardner]

On 04/23/2014 12:59 AM, AceLan Kao wrote:
> SRU JUSTIFICATION
>
> BugLink: https://bugs.launchpad.net/bugs/1305522
>
> IMPACT: The Synaptics touchpad with i2c interface doesn't work well
> after kernel starting supporting i2c-hid device. And the solution
> currently we provided is to blacklist i2c_hid driver and let the
> touchpad fallback to use PS/2 interface.
>
> FIX: Synaptics already submitted patches to upstream and will be
> merged into kernel v3.6. I cherry-picked the essential patch set from
>     git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid.git rmi4
> The touchpad supports multi-touch up to 4 fingers(the most I can
> verified) after applying those patches.
>
> TEST: I have built a kernel for test and it works on a Dell laptop
> with Synaptics i2c touchpad I have on hands.
>     http://people.canonical.com/~acelan/bugs/lp1305522/
>
> git://kernel.ubuntu.com/acelan/ubuntu-trusty.git rmi4
>

So, the first 5 patches are actually upstream cherry-picks from 
3.15-rc1. Though large, they are mostly mechanical. The last 2 patches, 
which introduce a new driver, can be cherry-picked from linux-next.

I'm sure there can't _possibly_ be any bugs in merge window patches, but 
I'd feel better if there was some information in the LP report that 
indicates you've at least done a little regression testing.

rtg
-- 
Tim Gardner tim.gardner at canonical.com