tree 38a13de9603de6b37f5ee84a53ef08786c21c423
parent 063b472fbb44ac562797a630ac3516720f588140
author Russell King <rmk+kernel@arm.linux.org.uk> 1376509407 +0200
committer Dave Airlie <airlied@redhat.com> 1376867407 +1000

drm/i2c: tda998x: ensure VIP output mux is properly set

When switching between various drivers for this device, it's possible
that some critical registers are left containing values which affect
the device operation.  One such case encountered is the VIP output
mux register.  This defaults to 0x24 on powerup, but other drivers may
set this to 0x12.  This results in incorrect colours.

Fix this by ensuring that the register is always set to the power on
default setting.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Russell King <rmk_kernel@arm.linux.org.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>