drm/sti: drop use of drmP.h

Stop using the deprecated drmP.h header file.
Replaced with relevant forwards or headers files.
Header files sorted in all files touched.

Build tested with allyesconfig, allmodconfig for a number of
architectures.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190605134835.25112-2-sam@ravnborg.org

gpu: drm: sti: Adopt SPDX identifiers

Add SPDX identifiers to files under sti directory

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Acked-by: Vincent Abriou <vincent.abriou@st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171206112947.9569-2-benjamin.gaignard@st.com

drm/sti: adjust delay for AWG

Compensate delay introduced by AWG IP during DE generation

Signed-off-by: Bich Hemon <bich.hemon@st.com>
Reviewed-by: Vincent ABRIOU <vincent.abriou@st.com>

drm/sti: fix dvo data_enable signal

Modify AWG algorithm in order to handle more than 1023 lines

Signed-off-by: Bich Hemon <bich.hemon@st.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Reviewed-by: Vincent Abriou <vincent.abriou@st.com>

drm/sti: awg_utils code cleanup

data_en is a local variable that doesn't need to be set as
awg_generate_instr can be called directly with the requested value.

Signed-off-by: Bich Hemon <bich.hemon@st.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Reviewed-by: Vincent Abriou <vincent.abriou@st.com>

drm/sti: remove redundant sign extensions

arg is long int, so arg = (arg << 22) >> 22 makes the upper 22 bits of
arg equal to bit 9 (or bit 41). But we then mask away all but bits 0-9, so
this is entirely redundant.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Vincent Abriou <vincent.abriou@st.com>

drm: sti: fix static checker warning in sti_awg_utils

The shift and the mask done on arg value is useless
since arg is null.

Signed-off-by: Vincent Abriou <vincent.abriou@st.com>

drm: sti: add DVO output connector

Digital Video Out connector driver LCD panels.
Like HDMI and HDA it create bridge, encoder and connector
drm object.
Add binding description.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>