linux-stable.git/drivers/gpu/drm/sun4i/sun8i_ui_layer.c, branch linux-rolling-stable

drm/sun4i: Nuke mixer pointer from layer code

2025-11-12T09:18:25+00:00

It's not used anymore, so remove it. This allows trully independent
layer state from mixer.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-31-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai

drm/sun4i: layer: replace mixer with layer struct

2025-11-12T09:18:25+00:00

This allows to almost completely decouple layer code from mixer. This is
important for DE33.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-29-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai

drm/sun4i: mixer: split out layer config

2025-11-12T09:18:25+00:00

Later special plane only driver for DE33 will provide separate
configuration. This change will also help layer driver migrate away from
mixer structure.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-28-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai

drm/sun4i: layers: add physical index arg

2025-11-12T09:18:23+00:00

This avoids plane mapping in layers code, which allows future
refactoring, when layer code will move away from accessing mixer
structure.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-23-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai

drm/sun4i: layers: Make regmap for layers configurable

2025-11-12T09:18:23+00:00

Till DE33, there were no reason to decouple registers from mixer.
However, with future new plane driver, this will be necessary.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-21-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai

drm/sun4i: vi_scaler: use layer instead of mixer for args

2025-11-12T09:18:23+00:00

Layer related peripherals should take layer struct as a input. This
looks cleaner and also necessary for proper DE33 support later.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-20-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai

drm/sun4i: ui_scaler: use layer instead of mixer for args

2025-11-12T09:18:23+00:00

Layer related peripherals should take layer struct as a input. This
looks cleaner and also necessary for proper DE33 support later.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-19-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai

drm/sun4i: ui_layer: use layer struct instead of multiple args

2025-11-12T09:18:23+00:00

This change is equally a cleanup (less arguments) and preparation for
DE33 separate plane driver. It will introduce additional register space.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-17-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai

drm/sun4i: layer: move num of planes calc out of layer code

2025-11-12T09:18:22+00:00

With DE33, number of planes no longer depends on mixer because layers
are shared between all mixers.

Get this value via parameter, so DE specific code can fill in proper
value.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-16-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai

drm/sun4i: ui_layer: Change index meaning

2025-11-12T09:18:22+00:00

In the pursuit of making UI/VI layer code independent of DE version,
change meaning of UI index to index of the plane within mixer. DE33 can
split amount of VI and UI planes between multiple mixer in whatever way
it deems acceptable, so simple calculation VI num + UI index won't be
meaningful anymore.

Reviewed-by: Chen-Yu Tsai 
Tested-by: Ryan Walklin 
Signed-off-by: Jernej Skrabec 
Link: https://patch.msgid.link/20251104180942.61538-15-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai