drm/sun4i: tcon: Support backend input mux

Browse source

The TCON has a mux to select the source of the data to display.
This mux includes selecting the display backends. On the A31,
which has two display pipelines, this mux can let the TCON
select either backend as its data source. Although the muxing
can be changed on the fly, DRM needs to be able to group a
bunch of layers such that they get switched to another crtc
together. This is because the display backend does the layer
compositing, while the TCON generates the display timings.
This constraint is not supported by DRM.

Here we simply pair up backends and TCONs with the same ID.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170908075016.18657-7-wens@csie.org

...

This commit is contained in:

Chen-Yu Tsai 2017-09-08 15:50:14 +08:00 • committed by Maxime Ripard

parent be3fe0f9ed

commit 27e18de78e

2 changed files with 26 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

25

drivers/gpu/drm/sun4i/sun4i_tcon.c

View file

3

drivers/gpu/drm/sun4i/sun4i_tcon.h

View file