Better fit STI hardware structure.
Planes are no more responsible of updating mixer information such
as z-order and status. It is now up to the CRTC atomic flush to
do it. Plane actions (enable or disable) are performed atomically.
Disabling of a plane is synchronize with the vsync event.
Signed-off-by: NVincent Abriou <vincent.abriou@st.com>
Reviewed-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>

replace all "sti_drm_" occurences by "sti_"
Signed-off-by: NVincent Abriou <vincent.abriou@st.com>
Reviewed-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>

Purpose is to simplify the STI driver:
- remove layer structure
- consider video subdev as part of the compositor (like mixer subdev)
- remove useless STI_VID0 and STI_VID1 enum
Signed-off-by: NVincent Abriou <vincent.abriou@st.com>
Reviewed-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>

Apply the plane depth when the plane is updated.
If the depth is different from the previous plane update,
the register controlling the plane depth is cleaned and updated
with the new depth.
Signed-off-by: NVincent Abriou <vincent.abriou@st.com>
Reviewed-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>

For stih407 SoC enable the second mixer to get two CRTC.
Allow GPD planes and encoders to be connected to this new CRTC.
Cursor plane can only be set on first CRTC.
GPD clocks needed change the parent clock depending on which
CRTC GPD are used.
Signed-off-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>

Make sure that mixer control register is correctly reset
before use it.
Signed-off-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>

Mixer hardware IP is responsible of mixing the different inputs layers.
Z-order is managed by the mixer.
We could 2 mixers: one for main path and one for auxillary path

Mixers are part of Compositor hardware block
Signed-off-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>
Reviewed-by: NRob Clark <robdclark@gmail.com>