[Ksummit-discuss] [CORE TOPIC] Mainline kernel on a cellphone

[Kyungmin Park]

On Thu, Jul 23, 2015 at 10:23 PM, Krzysztof Kozlowski
<k.kozlowski at samsung.com> wrote:
> 2015-07-23 21:14 GMT+09:00 Pavel Machek <pavel at ucw.cz>:
>> On Thu 2015-07-23 13:21:19, Linus Walleij wrote:
>>> On Thu, Jul 23, 2015 at 12:57 PM, Pavel Machek <pavel at ucw.cz> wrote:
>>>
>>> > Significant percentage of phones run Linux kernel today, but geting
>>> > mainline kernel to work on a phone is very hard to do. (So hard, that
>>> > newest device that is close to working on recent mainline was made in
>>> > 2009.) There are multiple obstacles, including huge patches from
>>> > silicon vendors, missing GNU/Linux userspace support that makes kernel
>>> > testing hard, interfaces unsuitable for phones and power management
>>> > problems.
>>> >
>>> > Interested people:
>>> >
>>> > Sebastian Reichel <sre at kernel.org>
>>> > Pali Rohár <pali.rohar at gmail.com>
>>>
>>> I'm adding Björn Andersson <bjorn.andersson at sonymobile.com> to this list.
>>>
>>> Björn has as of yesterday booted a mainline kernel on the SONY
>>> Xperia Z3 and his company has demonstrated strong interest in
>>> getting the mainline kernel to run on their handsets.
>>> https://plus.google.com/102276447148493441479/posts/amRvpE8piSw
>>
>> Yes. Plus, there seems to be group at Samsung. Trats is a cellphone iirc.
>>
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2011-December/078428.html
>>
>> Signed-off-by: HeungJun, Kim <riverful.kim at samsung.com>
>> Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>

Already Krzysztof mentioned. Our team tried to support mainline kernel
for product and it's still on-going.
see gear 2 support with exysno3250.

I'm interested in this topic. Moreover KS is held at Korea. so It's
good chance to attend and discuss this topic.

Thank you,
Kyungmin Park
>
> Interesting topic also for me. We were (and still are) spending
> significant effort so Trats (~Galaxy S 2 for Tizen) and Trats2 devices
> (Galaxy S III released for Tizen) would be fully supported by
> mainline. The same we did more recently for Gear 2 smartwatch.
> Although it is not a cellphone but fits to a mobile device category.
>
> Standard Debian works fine on them. With a mobile operating system -
> like Tizen - it gets more difficult.
>
> Most of the drivers are there but few important SoC components are
> missing (for example camera for Gear 2). One of the obstacles here was
> lack of public firmware which prevented mainlining some of the drivers
> (e.g. FIMC - the camera).
>
> Best regards,
> Krzysztof
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