This reverts commit 83c0bcb6.

Lucas pointed out this was a mistake, and I missed the discussion,
so just revert it out to save a rebase.
Signed-off-by: NDave Airlie <airlied@redhat.com>

The intention is to program exactly WIN_A, not WIN_A and possibly
others.
Signed-off-by: NLucas Stach <dev@lynxeye.de>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Window properties are programmed through a shared aperture and have to
happen atomically. Also we do the read-update-write dance on some of the
shared regs.
To make sure that different functions don't stumble over each other
protect the register access with a mutex.
Signed-off-by: NLucas Stach <dev@lynxeye.de>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Fixes wrong picture offset observed when using HDMI output with a
Technisat HD TV.
Signed-off-by: NLucas Stach <dev@lynxeye.de>
Acked-by: NMark Zhang <markz@nvidia.com>
Tested-by: NMark Zhang <markz@nvidia.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Add support for host1x, the display controllers and HDMI on the Tegra30
SoC.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Tested-by: NStephen Warren <swarren@nvidia.com>
Tested-by: NMark Zhang <markz@nvidia.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Instead of using the stride derived from the display mode, use the pitch
associated with the currently active framebuffer. This fixes a bug where
the LCD display content would be skewed when enabling HDMI with a video
mode different from that of the LCD.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Tested-by: NTerje Bergstrom <tbergstrom@nvidia.com>
Tested-by: NMark Zhang <markz@nvidia.com>
Tested-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

This commit adds a KMS driver for the Tegra20 SoC. This includes basic
support for host1x and the two display controllers found on the Tegra20
SoC. Each display controller can drive a separate RGB/LVDS output.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Tested-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NMark Zhang <markz@nvidia.com>
Reviewed-by: NMark Zhang <markz@nvidia.com>
Tested-by: NMark Zhang <markz@nvidia.com>
Tested-and-acked-by: NAlexandre Courbot <acourbot@nvidia.com>
Acked-by: NTerje Bergstrom <tbergstrom@nvidia.com>
Tested-by: NTerje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>