Commit 3041228e authored by Chen-Yu Tsai's avatar Chen-Yu Tsai Committed by Maxime Ripard

drm/sun4i: Add compatible strings for A80 TCONs

The A80 has 2 or 3 TCONs. The documentation and vendor kernel are very
vague about the third TCON, to the point that it might not exist.

In the documentation, the first TCON is missing channel 1, and the
second is missing channel 0. However the vendor kernel seems to be
able to use them regardless. Here we model them like the old TCONs.

An oddity is that TCON0 requires the reset control for the eDP block
to be deasserted, for any register access to stick.

This patch adds compatible strings for TCON0 and TCON1, with TCON0
requiring an extra "edp" reset control.
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarChen-Yu Tsai <wens@csie.org>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180315114136.24747-2-wens@csie.org
parent db870864
...@@ -146,13 +146,16 @@ Required properties: ...@@ -146,13 +146,16 @@ Required properties:
* allwinner,sun8i-a83t-tcon-lcd * allwinner,sun8i-a83t-tcon-lcd
* allwinner,sun8i-a83t-tcon-tv * allwinner,sun8i-a83t-tcon-tv
* allwinner,sun8i-v3s-tcon * allwinner,sun8i-v3s-tcon
* allwinner,sun9i-a80-tcon-lcd
* allwinner,sun9i-a80-tcon-tv
- reg: base address and size of memory-mapped region - reg: base address and size of memory-mapped region
- interrupts: interrupt associated to this IP - interrupts: interrupt associated to this IP
- clocks: phandles to the clocks feeding the TCON. - clocks: phandles to the clocks feeding the TCON.
- 'ahb': the interface clocks - 'ahb': the interface clocks
- 'tcon-ch0': The clock driving the TCON channel 0, except for A83T TV TCON - 'tcon-ch0': The clock driving the TCON channel 0, if supported
- resets: phandles to the reset controllers driving the encoder - resets: phandles to the reset controllers driving the encoder
- "lcd": the reset line for the TCON channel 0 - "lcd": the reset line for the TCON
- "edp": the reset line for the eDP block (A80 only)
- clock-names: the clock names mentioned above - clock-names: the clock names mentioned above
- reset-names: the reset names mentioned above - reset-names: the reset names mentioned above
...@@ -171,7 +174,9 @@ Required properties: ...@@ -171,7 +174,9 @@ Required properties:
channel the endpoint is associated to. If that property is not channel the endpoint is associated to. If that property is not
present, the endpoint number will be used as the channel number. present, the endpoint number will be used as the channel number.
On SoCs other than the A33 and V3s, there is one more clock required: For TCONs with channel 0, there is one more clock required:
- 'tcon-ch0': The clock driving the TCON channel 0
For TCONs with channel 1, there is one more clock required:
- 'tcon-ch1': The clock driving the TCON channel 1 - 'tcon-ch1': The clock driving the TCON channel 1
When TCON support LVDS (all TCONs except TV TCON on A83T and those found When TCON support LVDS (all TCONs except TV TCON on A83T and those found
......
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