Re: [Qemu-devel] Questions about EDID

[Mark Cave-Ayland]

On 28/02/2019 05:49, Gerd Hoffmann wrote:

>   Hi,
> 
>> Right, at the moment all the MacOS driver does is parse the resolution list 
>> from the
>> EDID and add them to the dropdown list - it doesn't support the xres and 
>> yres properties.
> 
>> The main reason for this that OpenBIOS currently makes use of the -g XxYxD 
>> parameter
>> to set up the display resolution and bit depth, and AFAICT we currently only 
>> have
>> access to the X and Y resolutions via the EDID blob. So it's not clear 
>> whether EDID
>> can completely replace the existing mechanism yet.
> 
> EDID can only propagate x + y, not depth.

Right - my quick reading online was that there was very limited depth 
capability, and
certainly nothing greater than 16-bit.

Rather than duplicating these parameters, would it make sense to come up with a
custom QEMU extension block to hold the extra depth information?


ATB,

Mark.