drm/ingenic: Move IPU scale settings to private state

The IPU scaling information is computed in the plane's ".atomic_check"
callback, and used in the ".atomic_update" callback. As such, it is
state-specific, and should be moved to a private state structure.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20211026181240.213806-4-paul@crapouillou.netTested-by: Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Christophe Branchereau <cbranchereau@gmail.com>

drivers/gpu/drm/ingenic/ingenic-ipu.c

@@ -47,6 +47,8 @@ struct soc_info {
 
 struct ingenic_ipu_private_state {
 	struct drm_private_state base;
+
+	unsigned int num_w, num_h, denom_w, denom_h;
 };
 
 struct ingenic_ipu {
@@ -58,8 +60,6 @@ struct ingenic_ipu {
 	const struct soc_info *soc_info;
 	bool clk_enabled;
 
-	unsigned int num_w, num_h, denom_w, denom_h;
-
 	dma_addr_t addr_y, addr_u, addr_v;
 
 	struct drm_property *sharpness_prop;
@@ -85,6 +85,30 @@ to_ingenic_ipu_priv_state(struct drm_private_state *state)
 	return container_of(state, struct ingenic_ipu_private_state, base);
 }
 
+static struct ingenic_ipu_private_state *
+ingenic_ipu_get_priv_state(struct ingenic_ipu *priv, struct drm_atomic_state *state)
+{
+	struct drm_private_state *priv_state;
+
+	priv_state = drm_atomic_get_private_obj_state(state, &priv->private_obj);
+	if (IS_ERR(priv_state))
+		return ERR_CAST(priv_state);
+
+	return to_ingenic_ipu_priv_state(priv_state);
+}
+
+static struct ingenic_ipu_private_state *
+ingenic_ipu_get_new_priv_state(struct ingenic_ipu *priv, struct drm_atomic_state *state)
+{
+	struct drm_private_state *priv_state;
+
+	priv_state = drm_atomic_get_new_private_obj_state(state, &priv->private_obj);
+	if (!priv_state)
+		return NULL;
+
+	return to_ingenic_ipu_priv_state(priv_state);
+}
+
 /*
  * Apply conventional cubic convolution kernel. Both parameters
  *  and return value are 15.16 signed fixed-point.
@@ -305,11 +329,16 @@ static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane,
 	const struct drm_format_info *finfo;
 	u32 ctrl, stride = 0, coef_index = 0, format = 0;
 	bool needs_modeset, upscaling_w, upscaling_h;
+	struct ingenic_ipu_private_state *ipu_state;
 	int err;
 
 	if (!newstate || !newstate->fb)
 		return;
 
+	ipu_state = ingenic_ipu_get_new_priv_state(ipu, state);
+	if (WARN_ON(!ipu_state))
+		return;
+
 	finfo = drm_format_info(newstate->fb->format->format);
 
 	if (!ipu->clk_enabled) {
@@ -482,27 +511,27 @@ static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane,
 	if (ipu->soc_info->has_bicubic)
 		ctrl |= JZ_IPU_CTRL_ZOOM_SEL;
 
-	upscaling_w = ipu->num_w > ipu->denom_w;
+	upscaling_w = ipu_state->num_w > ipu_state->denom_w;
 	if (upscaling_w)
 		ctrl |= JZ_IPU_CTRL_HSCALE;
 
-	if (ipu->num_w != 1 || ipu->denom_w != 1) {
+	if (ipu_state->num_w != 1 || ipu_state->denom_w != 1) {
 		if (!ipu->soc_info->has_bicubic && !upscaling_w)
-			coef_index |= (ipu->denom_w - 1) << 16;
+			coef_index |= (ipu_state->denom_w - 1) << 16;
 		else
-			coef_index |= (ipu->num_w - 1) << 16;
+			coef_index |= (ipu_state->num_w - 1) << 16;
 		ctrl |= JZ_IPU_CTRL_HRSZ_EN;
 	}
 
-	upscaling_h = ipu->num_h > ipu->denom_h;
+	upscaling_h = ipu_state->num_h > ipu_state->denom_h;
 	if (upscaling_h)
 		ctrl |= JZ_IPU_CTRL_VSCALE;
 
-	if (ipu->num_h != 1 || ipu->denom_h != 1) {
+	if (ipu_state->num_h != 1 || ipu_state->denom_h != 1) {
 		if (!ipu->soc_info->has_bicubic && !upscaling_h)
-			coef_index |= ipu->denom_h - 1;
+			coef_index |= ipu_state->denom_h - 1;
 		else
-			coef_index |= ipu->num_h - 1;
+			coef_index |= ipu_state->num_h - 1;
 		ctrl |= JZ_IPU_CTRL_VRSZ_EN;
 	}
 
@@ -513,13 +542,13 @@ static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane,
 	/* Set the LUT index register */
 	regmap_write(ipu->map, JZ_REG_IPU_RSZ_COEF_INDEX, coef_index);
 
-	if (ipu->num_w != 1 || ipu->denom_w != 1)
+	if (ipu_state->num_w != 1 || ipu_state->denom_w != 1)
 		ingenic_ipu_set_coefs(ipu, JZ_REG_IPU_HRSZ_COEF_LUT,
-				      ipu->num_w, ipu->denom_w);
+				      ipu_state->num_w, ipu_state->denom_w);
 
-	if (ipu->num_h != 1 || ipu->denom_h != 1)
+	if (ipu_state->num_h != 1 || ipu_state->denom_h != 1)
 		ingenic_ipu_set_coefs(ipu, JZ_REG_IPU_VRSZ_COEF_LUT,
-				      ipu->num_h, ipu->denom_h);
+				      ipu_state->num_h, ipu_state->denom_h);
 
 	/* Clear STATUS register */
 	regmap_write(ipu->map, JZ_REG_IPU_STATUS, 0);
@@ -531,7 +560,8 @@ static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane,
 	dev_dbg(ipu->dev, "Scaling %ux%u to %ux%u (%u:%u horiz, %u:%u vert)\n",
 		newstate->src_w >> 16, newstate->src_h >> 16,
 		newstate->crtc_w, newstate->crtc_h,
-		ipu->num_w, ipu->denom_w, ipu->num_h, ipu->denom_h);
+		ipu_state->num_w, ipu_state->denom_w,
+		ipu_state->num_h, ipu_state->denom_h);
 }
 
 static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane,
@@ -545,6 +575,7 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane,
 	struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane);
 	struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
 	struct drm_crtc_state *crtc_state;
+	struct ingenic_ipu_private_state *ipu_state;
 
 	if (!crtc)
 		return 0;
@@ -553,6 +584,10 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane,
 	if (WARN_ON(!crtc_state))
 		return -EINVAL;
 
+	ipu_state = ingenic_ipu_get_priv_state(ipu, state);
+	if (IS_ERR(ipu_state))
+		return PTR_ERR(ipu_state);
+
 	/* Request a full modeset if we are enabling or disabling the IPU. */
 	if (!old_plane_state->crtc ^ !new_plane_state->crtc)
 		crtc_state->mode_changed = true;
@@ -605,10 +640,10 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane,
 	if (num_h > max_h)
 		return -EINVAL;
 
-	ipu->num_w = num_w;
-	ipu->num_h = num_h;
-	ipu->denom_w = denom_w;
-	ipu->denom_h = denom_h;
+	ipu_state->num_w = num_w;
+	ipu_state->num_h = num_h;
+	ipu_state->denom_w = denom_w;
+	ipu_state->denom_h = denom_h;
 
 out_check_damage:
 	if (ingenic_drm_map_noncoherent(ipu->master))