tree a6c3d7af84b9216b4926106893b05b559cc94a91
parent bf3ac278d389c8e0de5eba2e80b88cd81e3c90c8
author David Stevens <stevensd@google.com> 1537575911 -0700
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1537580951 +0000

[virtcon] Don't update framebuffer with no display

This change reduces how much work the virtcon does when it doesn't have
ownership of the display. First, add checks for ownership to all checks
for the presence of a display (i.e. vc_gfx being non-null), so we treat
not having ownership the same as not having a framebuffer to render to.
Second, add ownership checks to all checks for vc->active, so we treat
not having ownership as all virtcons being inactive.

Test: Check that output during no display appears when focus is gained
Change-Id: Ib8ca77b0c9a104131bd37756878b30f7136c1b38