linux-kernel - Re: [PATCH] bochs-drm: disable video before changing video mode

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Date:	Thu, 19 Mar 2015 09:26:57 +0100
From:	Gerd Hoffmann <kraxel@...hat.com>
To:	Chris Ruffin <chris.ruffin@...el.com>
Cc:	linux-kernel@...r.kernel.org, Dave Airlie <airlied@...hat.com>,
	cmruffin@...il.com
Subject: Re: [PATCH] bochs-drm: disable video before changing video mode

On Mi, 2015-03-18 at 12:37 -0400, Chris Ruffin wrote:
> qemu and simics simulators both seem to expect that video should be disabled
> before changing the video mode.

Not required for qemu.  qemu allows updating the modesetting registers
(xres + friends) while vbe is enabled.

Turning it off, then back on after updating the registers doesn't hurt
though.  So if this change gets things going on simics it's fine with
me.

Reviewed-by: Gerd Hoffmann <kraxel@...hat.com>

cheers,
  Gerd


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