tree 1efabb81007deecf873cb4070d336d0f670683ea
parent d4e7d7ac663fcb55f1b93575445fcbca372f17a7
author Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> 1545991423 +0000
committer Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> 1545994884 +0000

QemuVGADriver: add support for QEMU EDID data

Versions of QEMU >= 3.1 support passing of display information from host to guest
via an EDID blob accessible from the stdvga PCI MMIO BAR.

Whilst this feature is still in development, we can start by using the EDID data
to generate the list of supported guest resolutions as suggested by the host. As
EDID blob generation is currently disabled by default, it must be explicitly
enabled on the QEMU command line using "-device VGA,edid=on".

In the cases where the EDID data blob is not present, we fall back to using the
previous hard-coded set of guest resolutions.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>