linux-kernel - Re: [PATCH 4/4] ARM: multi_v7_defconfig: Enable DW USB2 support and rockchip phy

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Message-id: <55ED433A.5000907@samsung.com>
Date:	Mon, 07 Sep 2015 16:56:42 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Heiko Stübner <heiko@...ech.de>
Cc:	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	linux-rockchip@...ts.infradead.org, Arnd Bergmann <arnd@...db.de>,
	Olof Johansson <olof@...om.net>,
	Kevin Hilman <khilman@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	Javier Martinez Canillas <javier@....samsung.com>,
	Kukjin Kim <kgene@...nel.org>,
	Thierry Reding <treding@...dia.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	linux-kernel@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Lee Jones <lee.jones@...aro.org>, Ray Jui <rjui@...adcom.com>,
	Stephen Warren <swarren@...dia.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH 4/4] ARM: multi_v7_defconfig: Enable DW USB2 support and
 rockchip phy

On 07.09.2015 16:53, Heiko Stübner wrote:
> Am Montag, 7. September 2015, 16:24:53 schrieb Krzysztof Kozlowski:
>> On 07.09.2015 16:10, Sjoerd Simons wrote:
>>> Hey Krzysztof,
>>>
>>> On Mon, 2015-09-07 at 09:02 +0900, Krzysztof Kozlowski wrote:
>>>> On 07.09.2015 05:16, Sjoerd Simons wrote:
>>>>> The DesignWare HS OTG USB 2.0 is used in various SoC families among
>>>>> wich
>>>>> the various rockchip SoCs, enable the driver and the PHY glue for
>>>>> rockchip
>>>>
>>>> +Cc Marek and Kukjin,
>>>>
>>>> This would conflict with Marek's:
>>>> [PATCH v2] ARM: multi_v7_defconfig: Enable DWC2 USB driver and USB
>>>> ethernet gadget
>>>> http://www.spinics.net/lists/linux-samsung-soc/msg46743.html
>>>>
>>>> Probably your series and Marek's change should go together to the
>>>> same
>>>> tree. How about rebasing your work on top of it?
>>>
>>> Thanks for the pointer! I'm entirely happy to rebase on Mareks patch or
>>> this one dropped for now until Mareks patch lands.
>>>
>>> These patches were based on current linux-next, so i guess Mareks pathc
>>> didn't land just yet? Tbh, i don't really know what tries multi_v7
>>> tends to go through (especially for non-platform specific changes)
>>
>> It was too late for Marek's patch to go for v4.3 merge window, so I
>> applied it but not pushed to my for-next branch. AFAIU, Stephen does not
>> want v4.4 material during merge window because of mangling with statistics.
>>
>>
>> If you want to rebase (or cherry-pick), you can find Marek's patch here:
>> branch: defconfig-for-next
>> repo: git://github.com/krzk/linux.git
>>
>> However this *branch will be rebased on v4.3-rc1* (because this is
>> material for v4.4). After v4.3-rc1 I can prepare a tag for other
>> interested parties.
>>
>>
>> As for multi_v7_defconfig policy, I got impression from the
>> Arnd/Olof/Kevin comments on LKML, that platform specific changes should
>> go through platform tree. However this is multi-platform change so maybe
>> we can push both patches through arm-soc.
>>
>>
>> Arnd, Olof, Kevin (BTW, you missed to CC him),
>>
>> How do you wish to handle this case (USB_DWC2 and two patches: Marek's
>> and Sjoerd's)?
> 
> I guess the easiest option would be to just drop the dwc2 from here, only 
> keeping the phy enablement and let everything (Marek's and Sjoerd's patch) 
> come together in the armsoc defconfig branch? As the rest of both patches don't 
> seem to touch common areas, they should be easily mergable from different trees 
> as well.

Yes, I agree. The config PHY_ROCKCHIP_USB does not depend on it directly
so this should work fine.

Best regards,
Krzysztof



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