[OpenBIOS] [PATCH v2] Implement copy-resolutions-property

[Mark Cave-Ayland]

On 02/10/16 00:20, Benjamin Herrenschmidt wrote:

> On Sat, 2016-10-01 at 19:11 +0100, Mark Cave-Ayland wrote:
>>
>> Also you never replied if there was a way of reading the in-built
>> resolutions from the QEMU VGA controller? If yes, let's grab the
>> information from there. If not, then it would make sense to add the
>> basic VGA/XGA resolutions into the QEMU,VGA device as default and then
>> simply add any custom resolution to the end of the list.
> 
> The emulated HW doesn't have a way to obtain a list of resultions,
> at least not that I know of.

I know it's not available through VBE, but was hoping there might be
some kind of EDID emulation on the QEMU VGA controller.

Other than that, can the MacOS driver environment read/write
configuration to disk? If so, all we need to do on boot is read the
current resolution via VBE and/or the QEMU,VGA device and we are good.

The first time the driver runs it can write a config file of default
VGA/XGA resolutions to disk which power users can alter themselves to
add further options on subsequent reboots if required.


ATB,

Mark.