sun4i/drm: sun8i: use mode_set engine callback

Newly introduced mode_set callback in engine structure is a much better
place for setting mixer output size and interlace mode for the following
reasons:
1. Aforementioned properties change only when mode changes, so it's
   enough to be set only once per mode set. Currently it's done whenever
   properties of primary plane are changed.
2. It's assumed that primary plane will always cover whole screen. While
   this is true most of the time, it's not always. DE2/3 planes are
   universal and mostly equal in functionality. There is no reason to
   add artificial limitation to primary planes.
3. The current code only works for UI layers, but some mixers do not
   have any UI layers.
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
[Samuel: update commit message]
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220424162633.12369-9-samuel@sholland.org

drivers/gpu/drm/sun4i/sun8i_mixer.c

@@ -298,9 +298,39 @@ static struct drm_plane **sun8i_layers_init(struct drm_device *drm,
 	return planes;
 }
 
+static void sun8i_mixer_mode_set(struct sunxi_engine *engine,
+				 const struct drm_display_mode *mode)
+{
+	struct sun8i_mixer *mixer = engine_to_sun8i_mixer(engine);
+	u32 bld_base, size, val;
+	bool interlaced;
+
+	bld_base = sun8i_blender_base(mixer);
+	interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
+	size = SUN8I_MIXER_SIZE(mode->hdisplay, mode->vdisplay);
+
+	DRM_DEBUG_DRIVER("Updating global size W: %u H: %u\n",
+			 mode->hdisplay, mode->vdisplay);
+
+	regmap_write(engine->regs, SUN8I_MIXER_GLOBAL_SIZE, size);
+	regmap_write(engine->regs, SUN8I_MIXER_BLEND_OUTSIZE(bld_base), size);
+
+	if (interlaced)
+		val = SUN8I_MIXER_BLEND_OUTCTL_INTERLACED;
+	else
+		val = 0;
+
+	regmap_update_bits(engine->regs, SUN8I_MIXER_BLEND_OUTCTL(bld_base),
+			   SUN8I_MIXER_BLEND_OUTCTL_INTERLACED, val);
+
+	DRM_DEBUG_DRIVER("Switching display mixer interlaced mode %s\n",
+			 interlaced ? "on" : "off");
+}
+
 static const struct sunxi_engine_ops sun8i_engine_ops = {
 	.commit		= sun8i_mixer_commit,
 	.layers_init	= sun8i_layers_init,
+	.mode_set	= sun8i_mixer_mode_set,
 };
 
 static const struct regmap_config sun8i_mixer_regmap_config = {

drivers/gpu/drm/sun4i/sun8i_ui_layer.c

@@ -120,36 +120,6 @@ static int sun8i_ui_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 	insize = SUN8I_MIXER_SIZE(src_w, src_h);
 	outsize = SUN8I_MIXER_SIZE(dst_w, dst_h);
 
-	if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
-		bool interlaced = false;
-		u32 val;
-
-		DRM_DEBUG_DRIVER("Primary layer, updating global size W: %u H: %u\n",
-				 dst_w, dst_h);
-		regmap_write(mixer->engine.regs,
-			     SUN8I_MIXER_GLOBAL_SIZE,
-			     outsize);
-		regmap_write(mixer->engine.regs,
-			     SUN8I_MIXER_BLEND_OUTSIZE(bld_base), outsize);
-
-		if (state->crtc)
-			interlaced = state->crtc->state->adjusted_mode.flags
-				& DRM_MODE_FLAG_INTERLACE;
-
-		if (interlaced)
-			val = SUN8I_MIXER_BLEND_OUTCTL_INTERLACED;
-		else
-			val = 0;
-
-		regmap_update_bits(mixer->engine.regs,
-				   SUN8I_MIXER_BLEND_OUTCTL(bld_base),
-				   SUN8I_MIXER_BLEND_OUTCTL_INTERLACED,
-				   val);
-
-		DRM_DEBUG_DRIVER("Switching display mixer interlaced mode %s\n",
-				 interlaced ? "on" : "off");
-	}
-
 	/* Set height and width */
 	DRM_DEBUG_DRIVER("Layer source offset X: %d Y: %d\n",
 			 state->src.x1 >> 16, state->src.y1 >> 16);