[PATCH v4] video: hyperv: hyperv_fb: Obtain screen resolution from Hyper-V host

[Michael Kelley]

From: Wei Hu <weh at microsoft.com> Sent: Thursday, September 5, 2019 2:12 AM
> 
> Beginning from Windows 10 RS5+, VM screen resolution is obtained from host.
> The "video=hyperv_fb" boot time option is not needed, but still can be
> used to overwrite what the host specifies. The VM resolution on the host
> could be set by executing the powershell "set-vmvideo" command.
> 
> Signed-off-by: Iouri Tarassov <iourit at microsoft.com>
> Signed-off-by: Wei Hu <weh at microsoft.com>
> ---
>     v2:
>     - Implemented fallback when version negotiation failed.
>     - Defined full size for supported_resolution array.
> 
>     v3:
>     - Corrected the synthvid major and minor version comparison problem.
> 
>     v4:
>     - Changed function name to synthvid_ver_ge().
> 
>  drivers/video/fbdev/hyperv_fb.c | 159 +++++++++++++++++++++++++++++---
>  1 file changed, 147 insertions(+), 12 deletions(-)
> 

Reviewed-by: Michael Kelley <mikelley at microsoft.com>