Bug 671520 – sys-kernel/gentoo-sources please include patch for I2C_AMD_MP2 driver

• Product: Gentoo Linux
• Status: RESOLVED OBSOLETE

[Description Chí-Thanh Christopher Nguyễn 2018-11-19 16:08:48 UTC]

A number of recent AMD Ryzen laptops use an ARM based I2C controller called "MP2" for which no driver is in mainline yet. This typically controls functions like touchpads or touchscreens.

The most recent version (v10 at the time of writing) was posted to the linux-i2c mailing list can be found at this bug report's URL field.

I tested this driver to apply against and work with gentoo-sources-4.19.2. Please consider adding this driver to gentoo-sources.

[Comment 1 Alice Ferrazzi 2018-11-20 14:33:30 UTC]

ok thanks you

[Comment 2 Mike Pagano 2018-11-21 23:58:57 UTC]

Hi, Chí-Thanh,

This driver is still being discussed[1] on the upstream mailing list with the latest version posted a week ago with no response as of this comment writing.

I'd be happier if we added this to genpatches under the 'experimental' use flag.

Is that acceptable to you?

[1] https://lkml.org/lkml/2018/11/14/748

[Comment 3 Chí-Thanh Christopher Nguyễn 2018-11-23 01:26:56 UTC]

I think there is not really a risk here as the driver defaults to N, and even if built, will only initialize on laptops that have an AMD MP2 I2C controller. Those systems will not work properly without the driver anyway.

Note that Ubuntu already ships an older version of this patch, enabled by default for all users.

[Comment 4 Chí-Thanh Christopher Nguyễn 2019-01-02 09:28:46 UTC]

v15 of the driver has been accepted for merging in the upcoming 4.22 merge window.

https://www.spinics.net/lists/linux-i2c/msg38330.html
https://www.spinics.net/lists/linux-i2c/msg38332.html

[Comment 5 Chí-Thanh Christopher Nguyễn 2019-04-08 10:39:15 UTC]

After some delay in mainlining for extra discussion, i2c_amd_mp2 is now merged in i2c-next for kernel 5.2 release.

https://www.spinics.net/lists/linux-i2c/msg39682.html

[Comment 6 Mike Pagano 2019-04-10 18:24:26 UTC]

Chithanh,

Can you find me the patch set here ?

https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git/

I looked in i2c/for-next, as indicated, but I can't find the series.

https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git/log/?h=i2c/for-next

Am I looking in the wrong repo ?

[Comment 7 Chí-Thanh Christopher Nguyễn 2019-04-10 18:29:32 UTC]

It is here:
https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git/commit/?h=i2c/for-next&id=529766e0a0114438887382a68d97341fbf8349fb

[Comment 8 Chí-Thanh Christopher Nguyễn 2019-07-08 12:33:59 UTC]

sys-kernel/gentoo-sources-5.2.0 is now in tree with mainline i2c_amd_mp2, no point in adding this to older kernels now

[Comment 9 Michael 'veremitz' Everitt 2019-07-08 12:37:10 UTC]

Is there any plan for upstream to backport it? Or are you happy that it WORKSFORME ?! :)