Message-ID: <CADN=WdopSpR1ZN0Wyhykx2WwZMyNu4_WehPf4VozY7GBg9QJ8g@mail.gmail.com>
Date:	Sat, 25 Apr 2015 00:58:34 -0400
From:	Adam Goode <adam@...cenitz.org>
To:	Andreas Noever <andreas.noever@...il.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: Thunderbolt hotplug not working on MacMini7,1

On Fri, Apr 24, 2015 at 2:39 PM, Adam Goode <adam@...cenitz.org> wrote:
> On Fri, Apr 24, 2015 at 7:46 AM, Andreas Noever
> <andreas.noever@...il.com> wrote:
>> On Fri, Apr 24, 2015 at 6:50 AM, Adam Goode <adam@...cenitz.org> wrote:
>>> On Thu, Apr 23, 2015 at 1:15 PM, Adam Goode <adam@...cenitz.org> wrote:
>>>> On Thu, Apr 23, 2015 at 12:12 PM, Andreas Noever
>>>> <andreas.noever@...il.com> wrote:
>>>>> On Thu, Apr 23, 2015 at 5:10 PM, Adam Goode <adam@...cenitz.org> wrote:
>>>>>> On Thu, Apr 23, 2015 at 9:28 AM, Adam Goode <adam@...cenitz.org> wrote:
>>>>>>>
>>>>>>> On Thu, Apr 23, 2015 at 6:08 AM, Andreas Noever
>>>>>>> <andreas.noever@...il.com> wrote:
>>>>>>> > Hi Adam,
>>>>>>> >
>>>>>>> > On my system (MacBookPro10,1 - 4 channel TB1) the bridges and the
>>>>>>> > controller both use 0x1547 and are only differentiated by
>>>>>>> > subvendor/subdevice.
>>>>>>> >
>>>>>>> > 0x156c is the 4 channel TB2 controller and was originally added by
>>>>>>> > Matthew. Judging from his patch it looks like the subvendor/subdevice
>>>>>>> > is set on his system:
>>>>>>> > http://patchwork.ozlabs.org/patch/354626/
>>>>>>> >
>>>>>>> > But it also indicates that the bridges already use different ids. If
>>>>>>> > that is the case then we can drop the subvendor/subdevice for 0x156c.
>>>>>>> > Matthew can you confirm that on your system 0x156c is used only for
>>>>>>> > the controller?
>>>>>>> >
>>>>>>> > Adam, could you check that suspend/resume works properly? Also your
>>>>>>> > bugzilla report suggest that hotplug might now work without the
>>>>>>> > driver. Could you try to revert the _OSI check (and disable the
>>>>>>> > driver) and check whether everything "just works"?
>>>>>>> >
>>>>>>>
>>>>>>> In _OSI("Darwin") mode, suspend/resume doesn't work. It failed to come
>>>>>>> back from suspend.
>>>>>>>
>>>>>>> I have to rebuild the kernel and remove Darwin again, but I will test
>>>>>>> suspend/resume in "Windows 2012" mode later.
>>>>>>>
>>>>>>> From previous testing, hotplug doesn't automatically work in "Windows
>>>>>>> 2012" mode. It exhibits the standard no-driver behavior where devices
>>>>>>> are not detected after boot. But even in "Windows 2012" mode I still
>>>>>>> do get the 0x156c device, which I think used to be hidden if !Darwin.
>>>>>>>
>>>>>>> More testing coming...
>>>>>>>
>>>>>>
>>>>>> I've booted into _OSI(Windows 2012) mode. I am not physically at the
>>>>>> device right now, but here is the current dmesg with 1 thunderbolt
>>>>>> device plugged in:
>>>>>>
>>>>>> [   15.576766] thunderbolt 0000:06:00.0: NHI initialized, starting thunderbolt
>>>>>> [   15.577868] thunderbolt 0000:06:00.0: allocating TX ring 0 of size 10
>>>>>> [   15.578939] thunderbolt 0000:06:00.0: allocating RX ring 0 of size 10
>>>>>> [   15.580008] thunderbolt 0000:06:00.0: control channel created
>>>>>> [   15.581068] thunderbolt 0000:06:00.0: control channel starting...
>>>>>> [   15.582122] thunderbolt 0000:06:00.0: starting TX ring 0
>>>>>> [   15.583173] thunderbolt 0000:06:00.0: enabling interrupt at
>>>>>> register 0x38200 bit 0 (0x0 -> 0x1)
>>>>>> [   15.584228] thunderbolt 0000:06:00.0: starting RX ring 0
>>>>>> [   15.585281] thunderbolt 0000:06:00.0: enabling interrupt at
>>>>>> register 0x38200 bit 12 (0x1 -> 0x1001)
>>>>>> [   15.586463] thunderbolt 0000:06:00.0: initializing Switch at 0x0
>>>>>> (depth: 0, up port: 5)
>>>>>> [   15.587526] thunderbolt 0000:06:00.0: old switch config:
>>>>>> [   15.588569] thunderbolt 0000:06:00.0:  Switch: 8086:156d (Revision:
>>>>>> 0, TB Version: 2)
>>>>>> [   15.589581] thunderbolt 0000:06:00.0:   Max Port Number: 12
>>>>>> [   15.590557] thunderbolt 0000:06:00.0:   Config:
>>>>>> [   15.591532] thunderbolt 0000:06:00.0:    Upstream Port Number: 5
>>>>>> Depth: 0 Route String: 0x0 Enabled: 1, PlugEventsDelay: 255ms
>>>>>> [   15.592530] thunderbolt 0000:06:00.0:    unknown1: 0x0 unknown4: 0x0
>>>>>> [   15.593530] thunderbolt 0000:06:00.0: 0: unsupported switch device id 0x156d
>>>>>> [   15.625612] thunderbolt 0000:06:00.0: 0: uid: 0x1001500947a60
>>>>>> [   15.626919] thunderbolt 0000:06:00.0:  Port 0: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: Port (0x1))
>>>>>> [   15.628028] thunderbolt 0000:06:00.0:   Max hop id (in/out): 7/7
>>>>>> [   15.629050] thunderbolt 0000:06:00.0:   Max counters: 8
>>>>>> [   15.630156] thunderbolt 0000:06:00.0:   NFC Credits: 0x700000
>>>>>> [   15.631685] thunderbolt 0000:06:00.0:  Port 1: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: Port (0x1))
>>>>>> [   15.632896] thunderbolt 0000:06:00.0:   Max hop id (in/out): 15/15
>>>>>> [   15.634000] thunderbolt 0000:06:00.0:   Max counters: 16
>>>>>> [   15.635001] thunderbolt 0000:06:00.0:   NFC Credits: 0x3c00000
>>>>>> [   15.636582] thunderbolt 0000:06:00.0:  Port 2: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: Port (0x1))
>>>>>> [   15.637737] thunderbolt 0000:06:00.0:   Max hop id (in/out): 15/15
>>>>>> [   15.638862] thunderbolt 0000:06:00.0:   Max counters: 16
>>>>>> [   15.639875] thunderbolt 0000:06:00.0:   NFC Credits: 0x3c00000
>>>>>> [   15.641452] thunderbolt 0000:06:00.0:  Port 3: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: Port (0x1))
>>>>>> [   15.642572] thunderbolt 0000:06:00.0:   Max hop id (in/out): 15/15
>>>>>> [   15.643702] thunderbolt 0000:06:00.0:   Max counters: 16
>>>>>> [   15.644683] thunderbolt 0000:06:00.0:   NFC Credits: 0x3c00000
>>>>>> [   15.646250] thunderbolt 0000:06:00.0:  Port 4: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: Port (0x1))
>>>>>> [   15.647285] thunderbolt 0000:06:00.0:   Max hop id (in/out): 15/15
>>>>>> [   15.648370] thunderbolt 0000:06:00.0:   Max counters: 16
>>>>>> [   15.649460] thunderbolt 0000:06:00.0:   NFC Credits: 0x3c00000
>>>>>> [   15.650539] thunderbolt 0000:06:00.0:  Port 5: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: NHI (0x2))
>>>>>> [   15.651517] thunderbolt 0000:06:00.0:   Max hop id (in/out): 11/11
>>>>>> [   15.652578] thunderbolt 0000:06:00.0:   Max counters: 16
>>>>>> [   15.653553] thunderbolt 0000:06:00.0:   NFC Credits: 0xf00000
>>>>>> [   15.654712] thunderbolt 0000:06:00.0:  Port 6: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: PCIe (0x100101))
>>>>>> [   15.655667] thunderbolt 0000:06:00.0:   Max hop id (in/out): 8/8
>>>>>> [   15.656681] thunderbolt 0000:06:00.0:   Max counters: 2
>>>>>> [   15.657595] thunderbolt 0000:06:00.0:   NFC Credits: 0x700000
>>>>>> [   15.658696] thunderbolt 0000:06:00.0:  Port 7: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: PCIe (0x100101))
>>>>>> [   15.659614] thunderbolt 0000:06:00.0:   Max hop id (in/out): 8/8
>>>>>> [   15.660574] thunderbolt 0000:06:00.0:   Max counters: 2
>>>>>> [   15.661414] thunderbolt 0000:06:00.0:   NFC Credits: 0x700000
>>>>>> [   15.662444] thunderbolt 0000:06:00.0:  Port 8: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: PCIe (0x100101))
>>>>>> [   15.663289] thunderbolt 0000:06:00.0:   Max hop id (in/out): 8/8
>>>>>> [   15.664194] thunderbolt 0000:06:00.0:   Max counters: 2
>>>>>> [   15.664995] thunderbolt 0000:06:00.0:   NFC Credits: 0x700000
>>>>>> [   15.665982] thunderbolt 0000:06:00.0:  Port 9: 8086:156d (Revision:
>>>>>> 0, TB Version: 1, Type: PCIe (0x100101))
>>>>>> [   15.666867] thunderbolt 0000:06:00.0:   Max hop id (in/out): 8/8
>>>>>> [   15.667701] thunderbolt 0000:06:00.0:   Max counters: 2
>>>>>> [   15.668454] thunderbolt 0000:06:00.0:   NFC Credits: 0x700000
>>>>>> [   15.669318] thunderbolt 0000:06:00.0:  Port 10: 8086:156d
>>>>>> (Revision: 0, TB Version: 1, Type: DP/HDMI (0xe0102))
>>>>>> [   15.670092] thunderbolt 0000:06:00.0:   Max hop id (in/out): 9/9
>>>>>> [   15.670863] thunderbolt 0000:06:00.0:   Max counters: 2
>>>>>> [   15.671624] thunderbolt 0000:06:00.0:   NFC Credits: 0x700000
>>>>>> [   15.672488] thunderbolt 0000:06:00.0:  Port 11: 8086:156d
>>>>>> (Revision: 0, TB Version: 1, Type: DP/HDMI (0xe0101))
>>>>>> [   15.673255] thunderbolt 0000:06:00.0:   Max hop id (in/out): 9/9
>>>>>> [   15.674015] thunderbolt 0000:06:00.0:   Max counters: 2
>>>>>> [   15.674758] thunderbolt 0000:06:00.0:   NFC Credits: 0xf00000
>>>>>> [   15.675617] thunderbolt 0000:06:00.0:  Port 12: 8086:156d
>>>>>> (Revision: 0, TB Version: 1, Type: DP/HDMI (0xe0101))
>>>>>> [   15.676370] thunderbolt 0000:06:00.0:   Max hop id (in/out): 9/9
>>>>>> [   15.677115] thunderbolt 0000:06:00.0:   Max counters: 2
>>>>>> [   15.677844] thunderbolt 0000:06:00.0:   NFC Credits: 0xf00000
>>>>>> [   15.678887] thunderbolt 0000:06:00.0: 0:1: is unplugged (state: 7)
>>>>>> [   15.679624] thunderbolt 0000:06:00.0: 0:3: is unplugged (state: 7)
>>>>> Strange... it does not detect the device. Does the TB device show up in lspci?
>>>>>
>>>>
>>>> This may be my fault. I am not sure if I reconnected the device when I
>>>> was debugging. Almost certainly not, actually. I left it while I was
>>>> compiling a new kernel and forgot. I'll let you know tonight when I
>>>> get back.
>>>>
>>>>
>>>> Adam
>>>
>>>
>>> Yes, definitely was unplugged. Hotplugging seems to work fine in
>>> either "Windows 2012" or "Darwin" mode.
>>>
>>> Suspend works, resume brings up video and then invariably freezes (in
>>> either _OSI condition).
>>>
>>>
>>> Adam
>>
>> Hm, it seems strange that hotplug would not work without the driver in
>> win2012 mode. If it works under windows (without additional drivers? -
>> maybe bootcamp includes a windows TB driver?) then it should also work
>> for us.
>>
>> Andreas
>
>
> I am planning to try Windows 8 or 10 on this hardware to see.
>
> I inspected the Boot Camp driver image and did not see and Thunderbolt
> drivers. But I will see for sure once I have Windows running.
>
> I did find other Thunderbolt drivers:
> https://downloadcenter.intel.com/download/23742/Thunderbolt-Intel-Thunderbolt-driver
> If you download and inspect the various .inf files (no need to install
> anything), you'll see the PCI matching logic they use.
>

Windows 10 has functioning hotplug on this hardware without any
Thunderbolt drivers. In fact, the 8086:156c device shows up in the
device manager as a device that Windows can't find the driver for.

So there might be some ACPI or other bug that is keeping this from
working on Linux as transparently as Windows.


Adam
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