Chromebook touchpads & touchscreen

[Chris J Arges]

On 01/07/2015 07:23 AM, Scot Doyle wrote:
> On Tue, 6 Jan 2015, Scot Doyle wrote:
> 
>> On Tue, 6 Jan 2015, Chris J Arges wrote:
>>>
>>> On 01/05/2015 01:15 PM, Scot Doyle wrote:
>>>> Would it be possible to have the mainline patches enabling four Chromebook 
>>>> touchpads and one touchscreen added to 3.16? The last four depend on the 
>>>> first and they apply to drivers/platform/chrome/chromeos_laptop.c
>>>>
>>>> da3b0ab75aadab63d1ffd5563100c9386e444dad  Acer C720
>>>> 5ea9567f6126846f5dcfa8515d7ef2c238133c0d  HP Chromebook 14
>>>> 0e1e5e590a457063c94d55c219b349bcf0d1f93a  Dell Chromebook 11
>>>> 963cb6fa0f5f115986e970b9d97440e4906524fa  Toshiba CB35
>>>> b90b3c4ae06af135e279c9a5aa1c640d22787fc4  Acer C720P
>>>>
>>>
>>> Scot,
>>> Yes this can be added to a stable release since it falls under hardware
>>> enablement. It would be very helpful for you to open a bug and follow
>>> our Stable Release Update procedure to make this easier to track:
>>> https://wiki.ubuntu.com/KernelTeam/KernelUpdates
>>>
>>> Once the bug is filed, please either send a new email or reply to this
>>> one with that and the SRU justification.
>>>
>>> Off the top of my head, are there any DTS files that need to be patched,
>>> or any other support needed? In addition do you have a method of
>>> verifying these particular patches once they are applied?
>>>
>>> Thanks,
>>> --chris j arges
>>
>> Chris, thanks for the guidance.
>>
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1408105
>>
>> The only other possible change would be ensuring CONFIG_CHROMEOS_LAPTOP=m. 
>> Yes, I could test by recompiling the kernel. Which tree and branch?
>>
>> -------
>> SRU Justification:
>> Impact: The Haswell-based Chromebooks have touchpads and a touchscreen 
>> unsupported in the 3.16 kernels
>> Fix: Upstream in 3.17
>> Testcase: I've tested fixes by compiling and using upstream 3.17+
>>
> 
> I'd like these patches to flow downstream to Debian and derivatives 
> (through the 3.16.y-ckt extended stable tree?). Am I following the correct 
> procedure?
> 

Scot,
Joe is looking at this bug, so he can request that this be applied to
stable 3.16.y-ckt as well if it meets stable kernel criteria. CC'ing
Kamal as well.

For extended stable kernels we follow generally what's here:
https://www.kernel.org/doc/Documentation/stable_kernel_rules.txt
Just ensure that there is an indication of which extended stable trees
the patch applies to. For example putting [3.16.y] in the subject line.
You can look at stable at kernel.org for more examples. Another helpful
practice is to CC the maintainers of the stable tree.

For more specific documentation about our extended kernels you can look
here:
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

I hope this helps, thanks again for your help,
--chris j arges