[coreboot] [baytrail_FSP] question about lpss device with ACPI mode in win8

Fri May 20 14:36:50 CEST 2016

Hi Zoran

Intel coreboot code + FSP + seabios1.91 in win8.1: All device is workable
and no yellow mark in device manager.

All lpss device is workable and no yellow mark in AMI UEFI BIOS.

coreboot4.4 + FSP+seabios1.91 in win8.1: lpss device is shown yellow mark
in device manager.

Thank you

2016-05-20 15:49 GMT+08:00 Zoran Stojsavljevic <
zoran.stojsavljevic at gmail.com>:

> Hello Chang,
>
> Just replace these info in my latest email (regarding BYT FSP and
> Coreboot). The later use case and questions remain the same.
>
> Thank you,
> Zoran
>
>
> On Fri, May 20, 2016 at 9:16 AM, cheng yichen <blessyichen at gmail.com>
> wrote:
>
>> Hi Zoran
>>
>> Sorry for the information is not clear. The MR5 that I mean is intel
>> release coreboot source code and FSP in intel web side. In the debug
>> message I find the version is coreboot4.0.
>>
>> in my previous mail, the MR5 is included intel coreboot source code and
>> FSP package.
>>
>> Thank you
>>
>> 2016-05-17 11:36 GMT+08:00 Zoran Stojsavljevic <
>> zoran.stojsavljevic at gmail.com>:
>>
>>> Hello Cheng,
>>>
>>> I am afraid, I have no ideas anymore what could be wrong. But I have for
>>> you one suggestion (path to resolution, maybe).
>>>
>>> No idea what you are using. In the sense BYT-FSP (MR5) -> Coreboot ->
>>> (payload???). You either use SeaBIOS (CSM ON), or Tiano Core/EK2 (CSM OFF).
>>>
>>> I would suggest the following: since it depends what payload you use
>>> because you would like to reuse your old HDD with WIN 8.1, to make test
>>> very short (no need to install other HDD with WIN 8.1).
>>>
>>> Please, take real UEFI BIOS (for BYT-M N2807 it is Client Group 64bit
>>> A093.R42 or later), and install it on some INTEL CRB (BayleyBay or
>>> BakerSport) where you already have N2807. Then, in relations what payload
>>> you are using, you need to set CSM ON or CSM OFF, to make work/reuse your
>>> original HDD with WIN 8.1.
>>>
>>> Please, after you are able to bring your INTEL BYT-M CRB to WIN 8.1,
>>> reboot, and again enter BIOS CMOS. There, under system setup/advanced
>>> settings, you should be able to find southbridge setup, where one of the
>>> options is LPSS.
>>>
>>> Please, experiment, with settings within LPSS mode (PCI and ACPI), and,
>>> please, report here do you have the same as with BYT-FSP MR5 settings as
>>> you use "pcdlpsssioenablepcimode" to "LPSS_PCI_MODE_DISABLE" and
>>> "ENABLE/DEFAULT" (do you see the same behavior in WIN 8.1 device manager)?
>>>
>>> Thank you,
>>> Zoran
>>>
>>> On Mon, May 16, 2016 at 2:06 PM, cheng yichen <blessyichen at gmail.com>
>>> wrote:
>>>
>>>> Hi  Zoran
>>>>
>>>> Base on the version Baytrail_coreboot_MR5_Dec-21-2015(coreboot) that is
>>>> released by Intel.
>>>> In the coreboot(Intel released and defautle is acpi mode) I can install
>>>> driver and device is workable in win8.
>>>> I can see hs-uart controller in device manage and no yellow mark.
>>>>
>>>> In last coreboot source code. after I modify "pcdlpsssioenablepcimode"
>>>> to "LPSS_PCI_MODE_DISABLE". Then the lpss device will be confgured to ACPI
>>>> mode.
>>>> but the hs-uart controller and I2C controller will shown yellow mark in
>>>> win8 device manager.
>>>> Because the main controller is not workable in win8. I don't check the
>>>> sub-device device.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> 2016-05-16 17:16 GMT+08:00 Zoran Stojsavljevic <
>>>> zoran.stojsavljevic at gmail.com>:
>>>>
>>>>> Hello Cheng,
>>>>>
>>>>> Again, I'll repeat my questions:
>>>>> [1] Are you talking about BIOS, where you are enabling in LPSS ACPI
>>>>> (disabling automatically PCI) mode?
>>>>> [2] I need better explanation of your use case... Are you using BYT
>>>>> MR4, then MR5, or instead MR4 BIOS, or...?
>>>>> [3] For WIN8.1 you need to have the following:
>>>>>       For BIOS to work (and get rid off these yellow triangles with
>>>>> question marks):
>>>>>       [A] ACPI mode in BIOS: South Cluster Configuration -> LPSS & SCC
>>>>> Configuration -> LPSS LPSS & SCC
>>>>>            Devices Mode -> Select "ACPI Mode";
>>>>>       [B] The GPIO controller driver is/should be prerequisite for
>>>>> HS-UART driver. There is a document named:
>>>>>             Intel_Processor_Win8_IO_Drivers_Gold_MR1. You should ask
>>>>> for it from INTEL support. If installed
>>>>>             correctly, you should see HS-UART Controller device under
>>>>> System Devices in Device Manager. Also
>>>>>             new unknown devices should appear: ACPI\BCM2E1A and
>>>>> ACPI\BCM4752. These devices are for
>>>>>             HS-UART Sub Device Driver;
>>>>>       [C] You should compile the UART Sub Device Driver (by 1.2.1 of
>>>>> Intel Atom E3800 Win8.1 HS-UART Sub
>>>>>             Device Driver Sample Code Guide_1.0), and install after
>>>>> building them. After that you should see Ports in
>>>>>             Device Manager.
>>>>>
>>>>> Zoran
>>>>>
>>>>> On Fri, May 13, 2016 at 5:43 AM, cheng yichen <blessyichen at gmail.com>
>>>>> wrote:
>>>>>
>>>>>>
>>>>>> HI all
>>>>>>
>>>>>> I try to enable Lpss device(i2c hs-uart) with ACPI mdoe.
>>>>>> i2c and hs-uart will show yellow mark in device manager with win8.1.
>>>>>> but I can't find the same issue in intel coreboot(versrion MR5).
>>>>>> Do you have any idea for the issue? Thank you
>>>>>>
>>>>>> --
>>>>>> coreboot mailing list: coreboot at coreboot.org
>>>>>> https://www.coreboot.org/mailman/listinfo/coreboot
>>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>> --
>> coreboot mailing list: coreboot at coreboot.org
>> https://www.coreboot.org/mailman/listinfo/coreboot
>>
>
>
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