This is a quite large renaming to consolidate display related bindings
into a single "display" directory from various scattered locations of
video, drm, gpu, fb, mipi, and panel. The prior location was somewhat
based on the Linux driver location, but bindings should be independent
of that.
Signed-off-by: NRob Herring <robh@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>

The dsi host looks for the connected panel node by parsing for a child
named 'panel'. This hierarchy isn't very flexible. The connected
panel is forced to be a child to the dsi host, and hence, a mipi dsi
device. This isn't suitable for dsi devices that don't use mipi dsi
as their control bus.

Follow the of_graph approach of creating ports and endpoints to
represent the connections between the dsi host and the panel connected
to it. In our case, the dsi host will only have one output port, linked
to the panel's input port.

Update DT binding documentation with device graph usage info.

v3:
- Fix return value checks of of_graph_* calls.
- Don't make port a mandatory DT property
- Fix defer check when no panel node specified
- Rename parse_dt func to align with other dsi_host funcs
Reviewed-by: NHai Li <hali@codeaurora.org>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>

DSI controller on msm8x94 is version 1.3, which requires different
power supplies and works with 20nm DSI PHY. This change is to add
the basic support for this version.
Signed-off-by: NHai Li <hali@codeaurora.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>

Some targets use pinctrl framework to configure some
pins. This change allows DSI driver to set default and
sleep pinctrl status.
Signed-off-by: NHai Li <hali@codeaurora.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>

The current term of *dual panel* in DSI driver code causes confusion.
It is supposed to indicate the panel using two DSI links. Rename it
to *dual DSI*.
Signed-off-by: NHai Li <hali@codeaurora.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>

There are different types of PHY from one chipset to another, while
the DSI host controller is relatively consistent across platforms.
Also, the PLL inside PHY is providing the source of DSI byte and
pixel clocks, which are used by DSI host controller. Separated devices
for clock provider and clock consumer make DSI driver better fit into
common clock framework.
Signed-off-by: NHai Li <hali@codeaurora.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>

Signed-off-by: NHai Li <hali@codeaurora.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>