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dt-bindings: display: sunxi-drm: Add TCON TOP description

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TCON TOP main purpose is to configure whole display pipeline. It
determines relationships between mixers and TCONs, selects source TCON
for HDMI, muxes LCD and TV encoder GPIO output, selects TV encoder
clock source and contains additional TV TCON and DSI gates.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180625120304.7543-5-jernej.skrabec@siol.net
This commit is contained in:
Jernej Skrabec 2018-06-25 14:02:44 +02:00 committed by Maxime Ripard
parent 3fa0e8f6f9
commit 59a9c39544
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56
Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
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@ -187,6 +187,62 @@ And on the A23, A31, A31s and A33, you need one more clock line:
- 'lvds-alt': An alternative clock source, separate from the TCON channel 0
clock, that can be used to drive the LVDS clock
TCON TOP
--------
TCON TOPs main purpose is to configure whole display pipeline. It determines
relationships between mixers and TCONs, selects source TCON for HDMI, muxes
LCD and TV encoder GPIO output, selects TV encoder clock source and contains
additional TV TCON and DSI gates.
It allows display pipeline to be configured in very different ways:
/ LCD0/LVDS0
/ [0] TCON-LCD0
| \ MIPI DSI
mixer0 |
\ / [1] TCON-LCD1 - LCD1/LVDS1
TCON-TOP
/ \ [2] TCON-TV0 [0] - TVE0/RGB
mixer1 | \
| TCON-TOP - HDMI
| /
\ [3] TCON-TV1 [1] - TVE1/RGB
Note that both TCON TOP references same physical unit. Both mixers can be
connected to any TCON.
Required properties:
- compatible: value must be one of:
* allwinner,sun8i-r40-tcon-top
- reg: base address and size of the memory-mapped region.
- clocks: phandle to the clocks feeding the TCON TOP
* bus: TCON TOP interface clock
* tcon-tv0: TCON TV0 clock
* tve0: TVE0 clock
* tcon-tv1: TCON TV1 clock
* tve1: TVE0 clock
* dsi: MIPI DSI clock
- clock-names: clock name mentioned above
- resets: phandle to the reset line driving the TCON TOP
- #clock-cells : must contain 1
- clock-output-names: Names of clocks created for TCON TV0 channel clock,
TCON TV1 channel clock and DSI channel clock, in that order.
- ports: A ports node with endpoint definitions as defined in
Documentation/devicetree/bindings/media/video-interfaces.txt. 6 ports should
be defined:
* port 0 is input for mixer0 mux
* port 1 is output for mixer0 mux
* port 2 is input for mixer1 mux
* port 3 is output for mixer1 mux
* port 4 is input for HDMI mux
* port 5 is output for HDMI mux
All output endpoints for mixer muxes and input endpoints for HDMI mux should
have reg property with the id of the target TCON, as shown in above graph
(0-3 for mixer muxes and 0-1 for HDMI mux). All ports should have only one
endpoint connected to remote endpoint.
DRC
---

11
include/dt-bindings/clock/sun8i-tcon-top.h Normal file
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@ -0,0 +1,11 @@
/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
/* Copyright (C) 2018 Jernej Skrabec <jernej.skrabec@siol.net> */
#ifndef _DT_BINDINGS_CLOCK_SUN8I_TCON_TOP_H_
#define _DT_BINDINGS_CLOCK_SUN8I_TCON_TOP_H_
#define CLK_TCON_TOP_TV0 0
#define CLK_TCON_TOP_TV1 1
#define CLK_TCON_TOP_DSI 2
#endif /* _DT_BINDINGS_CLOCK_SUN8I_TCON_TOP_H_ */