drm/udl: Ensure channel is selected before using the device.
authorJamie Lentin <jm@lentin.co.uk>
Mon, 22 Aug 2016 22:17:34 +0000 (23:17 +0100)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Tue, 23 Aug 2016 07:29:59 +0000 (09:29 +0200)
commitd1c151dcae628bf73b4aa2c2c5abeccf3d17e544
treef5803a7ae717be9dc526db6e3fddb509f2d213df
parentb4ba97e76763c4e582e3af1079e220e93b1b0d76
drm/udl: Ensure channel is selected before using the device.

Lift configuration command from udlfb. This appears to be essential for
at least a Rextron VCUD-60, without which no URB communication occurs.

Signed-off-by: Jamie Lentin <jm@lentin.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1471904254-26545-1-git-send-email-jm@lentin.co.uk
drivers/gpu/drm/udl/udl_main.c