drm/sun4i: Nuke mixer pointer from layer code

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

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

Author: jernejsk

drivers/gpu/drm/sun4i/sun8i_mixer.c

@@ -269,7 +269,7 @@ static void sun8i_mixer_commit(struct sunxi_engine *engine,
 		int w, h, x, y, zpos;
 		bool enable;
 
-		if (!(plane->possible_crtcs & drm_crtc_mask(crtc)) || layer->mixer != mixer)
+		if (!(plane->possible_crtcs & drm_crtc_mask(crtc)))
 			continue;
 
 		plane_state = drm_atomic_get_new_plane_state(state, plane);
@@ -337,9 +337,8 @@ static struct drm_plane **sun8i_layers_init(struct drm_device *drm,
 		if (mixer->cfg->de_type == SUN8I_MIXER_DE33)
 			phy_index = mixer->cfg->map[i];
 
-		layer = sun8i_vi_layer_init_one(drm, mixer, type,
-						mixer->engine.regs, i,
-						phy_index, plane_cnt,
+		layer = sun8i_vi_layer_init_one(drm, type, mixer->engine.regs,
+						i, phy_index, plane_cnt,
 						&mixer->cfg->lay_cfg);
 		if (IS_ERR(layer)) {
 			dev_err(drm->dev,
@@ -363,9 +362,8 @@ static struct drm_plane **sun8i_layers_init(struct drm_device *drm,
 		if (mixer->cfg->de_type == SUN8I_MIXER_DE33)
 			phy_index = mixer->cfg->map[index];
 
-		layer = sun8i_ui_layer_init_one(drm, mixer, type,
-						mixer->engine.regs, index,
-						phy_index, plane_cnt,
+		layer = sun8i_ui_layer_init_one(drm, type, mixer->engine.regs,
+						index, phy_index, plane_cnt,
 						&mixer->cfg->lay_cfg);
 		if (IS_ERR(layer)) {
 			dev_err(drm->dev, "Couldn't initialize %s plane\n",

drivers/gpu/drm/sun4i/sun8i_mixer.h

@@ -226,7 +226,6 @@ enum {
 
 struct sun8i_layer {
 	struct drm_plane		plane;
-	struct sun8i_mixer		*mixer;
 	int				type;
 	int				index;
 	int				channel;

drivers/gpu/drm/sun4i/sun8i_ui_layer.c

@@ -258,7 +258,6 @@ static const uint64_t sun8i_layer_modifiers[] = {
 };
 
 struct sun8i_layer *sun8i_ui_layer_init_one(struct drm_device *drm,
-					    struct sun8i_mixer *mixer,
 					    enum drm_plane_type type,
 					    struct regmap *regs,
 					    int index, int phy_index,
@@ -272,7 +271,6 @@ struct sun8i_layer *sun8i_ui_layer_init_one(struct drm_device *drm,
 	if (!layer)
 		return ERR_PTR(-ENOMEM);
 
-	layer->mixer = mixer;
 	layer->type = SUN8I_LAYER_TYPE_UI;
 	layer->index = index;
 	layer->channel = phy_index;

drivers/gpu/drm/sun4i/sun8i_ui_layer.h

@@ -50,7 +50,6 @@ struct sun8i_mixer;
 struct sun8i_layer;
 
 struct sun8i_layer *sun8i_ui_layer_init_one(struct drm_device *drm,
-					    struct sun8i_mixer *mixer,
 					    enum drm_plane_type type,
 					    struct regmap *regs,
 					    int index, int phy_index,

drivers/gpu/drm/sun4i/sun8i_vi_layer.c

@@ -409,7 +409,6 @@ static const uint64_t sun8i_layer_modifiers[] = {
 };
 
 struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
-					    struct sun8i_mixer *mixer,
 					    enum drm_plane_type type,
 					    struct regmap *regs,
 					    int index, int phy_index,
@@ -426,7 +425,6 @@ struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 	if (!layer)
 		return ERR_PTR(-ENOMEM);
 
-	layer->mixer = mixer;
 	layer->type = SUN8I_LAYER_TYPE_VI;
 	layer->index = index;
 	layer->channel = phy_index;

drivers/gpu/drm/sun4i/sun8i_vi_layer.h

@@ -55,7 +55,6 @@ struct sun8i_mixer;
 struct sun8i_layer;
 
 struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
-					    struct sun8i_mixer *mixer,
 					    enum drm_plane_type type,
 					    struct regmap *regs,
 					    int index, int phy_index,