Re: Headless devices - BDS to use?

[Laszlo Ersek <lersek@redhat.com>]

On 11/14/16 18:36, Kurt Kennett wrote:
> But it is pulling in:
> 
> INF  MdeModulePkg/Universal/DisplayEngineDxe/DisplayEngineDxe.inf
> INF  MdeModulePkg/Universal/SetupBrowserDxe/SetupBrowserDxe.inf
> 
> Which are display based components.  Are these required in the image even though they are not used?
> 
> A browser and display engine take up a lot of space on a constrained storage system.

The display output is character console based. It can be multiplexed to
several separate outputs, such as graphical consoles and serial
terminals, by including GraphicsConsoleDxe, ConSplitterDxe, ConPlatformDxe.

If you have no GOP, and only one serial console, then TerminalDxe should
be all you need.

The driver / protocol stack is not simple to see through (I'm sure I've
made a few mistakes above), but it is very modular. (I occasionally
spend the time to understand it all, and then I forget the details
again.) It should be possible to build up what you need (and only what
you need) iteratively.

Thanks
Laszlo

> 
> K2
> 
> -----Original Message-----
> From: Kinney, Michael D [mailto:michael.d.kinney@intel.com] 
> Sent: Monday, November 14, 2016 9:34 AM
> To: Kurt Kennett <Kurt.Kennett@microsoft.com>; Laszlo Ersek <lersek@redhat.com>; Kinney, Michael D <michael.d.kinney@intel.com>
> Cc: edk2-devel@lists.01.org <edk2-devel@ml01.01.org>
> Subject: RE: [edk2] Headless devices - BDS to use?
> 
> K2,
> 
> The QuarkPlatformPkg is an example of a serial only console platform that uses MdeModulePkg BDS.
> 
> Mike
> 
>> -----Original Message-----
>> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of 
>> Kurt Kennett
>> Sent: Monday, November 14, 2016 9:21 AM
>> To: Laszlo Ersek <lersek@redhat.com>
>> Cc: edk2-devel@lists.01.org <edk2-devel@ml01.01.org>
>> Subject: Re: [edk2] Headless devices - BDS to use?
>>
>> Okay, but there is no reference or example for such, correct?
>>
>> Right now people who don't have a display must fumble about trying to 
>> get Hii resources they don't need, understand, or use to get it to work?
>>
>> And there is no boot manager menu that is not graphics based?
>>
>> K2
>>
>> -----Original Message-----
>> From: Laszlo Ersek [mailto:lersek@redhat.com]
>> Sent: Monday, November 14, 2016 9:19 AM
>> To: Kurt Kennett <Kurt.Kennett@microsoft.com>
>> Cc: edk2-devel@lists.01.org <edk2-devel@ml01.01.org>
>> Subject: Re: [edk2] Headless devices - BDS to use?
>>
>> On 11/14/16 17:51, Kurt Kennett wrote:
>>> What BDS are headless devices (no display, serial port only) supposed to use?
>>>
>>> The MdeModulePkg one seems to require Hii resources in order to work at all.
>>
>> It may require HII resources, but it works fine with just a serial port.
>>
>> Thanks
>> Laszlo
>>
>>> The ArmPlatformPkg BDS (that supported headless devices just fine) 
>>> seems to be
>> gone now.
>>>
>>> K2
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>>
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