video: tegra: dc_ext: Add head status ioctl
authorRobert Morell <rmorell@nvidia.com>
Wed, 25 May 2011 02:27:57 +0000 (19:27 -0700)
committerDan Willemsen <dwillemsen@nvidia.com>
Thu, 1 Dec 2011 05:48:13 +0000 (21:48 -0800)
commitefa5b6439cc4c6f714af3a56b1ca467a8ff6a739
treeb0c03a86296029f7d71506cb2c378f2f7148a6df
parente2404dfeecd4204174410e8e2b0e93ed54b2f63a
video: tegra: dc_ext: Add head status ioctl

This change adds a new tegra_dc_ext ioctl to allow userspace to query
whether a head is currently enabled or not.  This is necessary for the X
server to be able to restore the outputs that were enabled before it was
started.

bug 818525

Original-Change-Id: I6d209894081312621f623a722cdd3fcb53553c61
Signed-off-by: Robert Morell <rmorell@nvidia.com>
Reviewed-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Olof Johansson <olofj@chromium.org>
Reviewed-on: http://git-master/r/40530
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>

Rebase-Id: Re42eae066099587529fbcc677c06ddefef18d36d
drivers/video/tegra/dc/ext/dev.c
include/video/tegra_dc_ext.h