treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 423

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundationr

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 7 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Armijn Hemel <armijn@tjaldur.nl>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531190113.913773588@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drm/exynos: decon: Make pixel blend mode configurable

The decon hardware supports different blend modes. Add pixel blend mode
property and make it configurable, by modifying the blend equation.

Tested on TM2 with Exynos 5433 CPU, on top of linux-next-20181019.

Signed-off-by: Christoph Manszewski <c.manszewski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos: decon: Make plane alpha configurable

The decon hardware supports variable plane alpha. Currently planes
are opaque, make this configurable.

Tested on TM2 with Exynos 5433 CPU, on top of linux-next-20181019.

Signed-off-by: Christoph Manszewski <c.manszewski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos/decon: Add include guard to the Exynos7 header

Although header is included only once but still having an include guard
is a good practice. To avoid confusion, add SoC prefix to existing
Exynos5433 header include guard.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos/decon: Move headers from global to local place

The DECON headers contain only defines for registers. There are no
other drivers using them so this should be put locally to the Exynos DRM
driver. Keeping headers local helps managing the code.

Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>