drm/msm/mdp5: Add plane blending operation support for MDP5 (v2)

This change is to add properties alpha/zpos/blend_mode to mdp5 plane
for alpha blending operation to generate the blended output.
v1: Initial change
v2: Change "premultilied" property to enum (Rob's comment)

Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>
[Don't actually expose alpha/premultiplied props to userspace yet
pending a chance for discussion and some userspace to exercise it]
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c

@@ -160,7 +160,7 @@ static void complete_flip(struct drm_crtc *crtc, struct drm_file *file)
 
 	if (mdp5_crtc->ctl && !crtc->state->enable) {
 		/* set STAGE_UNUSED for all layers */
-		mdp5_ctl_blend(mdp5_crtc->ctl, mdp5_crtc->lm, 0x00000000);
+		mdp5_ctl_blend(mdp5_crtc->ctl, mdp5_crtc->lm, NULL, 0, 0);
 		mdp5_ctl_release(mdp5_crtc->ctl);
 		mdp5_crtc->ctl = NULL;
 	}
@@ -196,13 +196,9 @@ static bool mdp5_crtc_mode_fixup(struct drm_crtc *crtc,
 /*
  * blend_setup() - blend all the planes of a CRTC
  *
- * When border is enabled, the border color will ALWAYS be the base layer.
- * Therefore, the first plane (private RGB pipe) will start at STAGE0.
- * If disabled, the first plane starts at STAGE_BASE.
- *
- * Note:
- * Border is not enabled here because the private plane is exactly
- * the CRTC resolution.
+ * If no base layer is available, border will be enabled as the base layer.
+ * Otherwise all layers will be blended based on their stage calculated
+ * in mdp5_crtc_atomic_check.
  */
 static void blend_setup(struct drm_crtc *crtc)
 {
@@ -210,9 +206,14 @@ static void blend_setup(struct drm_crtc *crtc)
 	struct mdp5_kms *mdp5_kms = get_kms(crtc);
 	struct drm_plane *plane;
 	const struct mdp5_cfg_hw *hw_cfg;
-	uint32_t lm = mdp5_crtc->lm, blend_cfg = 0;
+	struct mdp5_plane_state *pstate, *pstates[STAGE_MAX + 1] = {NULL};
+	const struct mdp_format *format;
+	uint32_t lm = mdp5_crtc->lm;
+	uint32_t blend_op, fg_alpha, bg_alpha, ctl_blend_flags = 0;
 	unsigned long flags;
-#define blender(stage)	((stage) - STAGE_BASE)
+	uint8_t stage[STAGE_MAX + 1];
+	int i, plane_cnt = 0;
+#define blender(stage)	((stage) - STAGE0)
 
 	hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
 
@@ -222,33 +223,73 @@ static void blend_setup(struct drm_crtc *crtc)
 	if (!mdp5_crtc->ctl)
 		goto out;
 
+	/* Collect all plane information */
 	drm_atomic_crtc_for_each_plane(plane, crtc) {
-		enum mdp_mixer_stage_id stage =
-			to_mdp5_plane_state(plane->state)->stage;
+		pstate = to_mdp5_plane_state(plane->state);
+		pstates[pstate->stage] = pstate;
+		stage[pstate->stage] = mdp5_plane_pipe(plane);
+		plane_cnt++;
+	}
 
-		/*
-		 * Note: This cannot happen with current implementation but
-		 * we need to check this condition once z property is added
-		 */
-		BUG_ON(stage > hw_cfg->lm.nb_stages);
+	/*
+	* If there is no base layer, enable border color.
+	* Although it's not possbile in current blend logic,
+	* put it here as a reminder.
+	*/
+	if (!pstates[STAGE_BASE] && plane_cnt) {
+		ctl_blend_flags |= MDP5_CTL_BLEND_OP_FLAG_BORDER_OUT;
+		DBG("Border Color is enabled");
+	}
 
-		/* LM */
-		mdp5_write(mdp5_kms,
-				REG_MDP5_LM_BLEND_OP_MODE(lm, blender(stage)),
-				MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_CONST) |
-				MDP5_LM_BLEND_OP_MODE_BG_ALPHA(BG_CONST));
+	/* The reset for blending */
+	for (i = STAGE0; i <= STAGE_MAX; i++) {
+		if (!pstates[i])
+			continue;
+
+		format = to_mdp_format(
+			msm_framebuffer_format(pstates[i]->base.fb));
+		plane = pstates[i]->base.plane;
+		blend_op = MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_CONST) |
+			MDP5_LM_BLEND_OP_MODE_BG_ALPHA(BG_CONST);
+		fg_alpha = pstates[i]->alpha;
+		bg_alpha = 0xFF - pstates[i]->alpha;
+		DBG("Stage %d fg_alpha %x bg_alpha %x", i, fg_alpha, bg_alpha);
+
+		if (format->alpha_enable && pstates[i]->premultiplied) {
+			blend_op = MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_CONST) |
+				MDP5_LM_BLEND_OP_MODE_BG_ALPHA(FG_PIXEL);
+			if (fg_alpha != 0xff) {
+				bg_alpha = fg_alpha;
+				blend_op |=
+					MDP5_LM_BLEND_OP_MODE_BG_MOD_ALPHA |
+					MDP5_LM_BLEND_OP_MODE_BG_INV_MOD_ALPHA;
+			} else {
+				blend_op |= MDP5_LM_BLEND_OP_MODE_BG_INV_ALPHA;
+			}
+		} else if (format->alpha_enable) {
+			blend_op = MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_PIXEL) |
+				MDP5_LM_BLEND_OP_MODE_BG_ALPHA(FG_PIXEL);
+			if (fg_alpha != 0xff) {
+				bg_alpha = fg_alpha;
+				blend_op |=
+				       MDP5_LM_BLEND_OP_MODE_FG_MOD_ALPHA |
+				       MDP5_LM_BLEND_OP_MODE_FG_INV_MOD_ALPHA |
+				       MDP5_LM_BLEND_OP_MODE_BG_MOD_ALPHA |
+				       MDP5_LM_BLEND_OP_MODE_BG_INV_MOD_ALPHA;
+			} else {
+				blend_op |= MDP5_LM_BLEND_OP_MODE_BG_INV_ALPHA;
+			}
+		}
+
+		mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_OP_MODE(lm,
+				blender(i)), blend_op);
 		mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_FG_ALPHA(lm,
-				blender(stage)), 0xff);
+				blender(i)), fg_alpha);
 		mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_BG_ALPHA(lm,
-				blender(stage)), 0x00);
-		/* CTL */
-		blend_cfg |= mdp_ctl_blend_mask(mdp5_plane_pipe(plane), stage);
-		DBG("%s: blending pipe %s on stage=%d", mdp5_crtc->name,
-				pipe2name(mdp5_plane_pipe(plane)), stage);
+				blender(i)), bg_alpha);
 	}
 
-	DBG("%s: lm%d: blend config = 0x%08x", mdp5_crtc->name, lm, blend_cfg);
-	mdp5_ctl_blend(mdp5_crtc->ctl, lm, blend_cfg);
+	mdp5_ctl_blend(mdp5_crtc->ctl, lm, stage, plane_cnt, ctl_blend_flags);
 
 out:
 	spin_unlock_irqrestore(&mdp5_crtc->lm_lock, flags);
@@ -339,7 +380,8 @@ static int mdp5_crtc_atomic_check(struct drm_crtc *crtc,
 	struct mdp5_kms *mdp5_kms = get_kms(crtc);
 	struct drm_plane *plane;
 	struct drm_device *dev = crtc->dev;
-	struct plane_state pstates[STAGE3 + 1];
+	struct plane_state pstates[STAGE_MAX + 1];
+	const struct mdp5_cfg_hw *hw_cfg;
 	int cnt = 0, i;
 
 	DBG("%s: check", mdp5_crtc->name);
@@ -354,10 +396,10 @@ static int mdp5_crtc_atomic_check(struct drm_crtc *crtc,
 	/* verify that there are not too many planes attached to crtc
 	 * and that we don't have conflicting mixer stages:
 	 */
+	hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
 	drm_atomic_crtc_state_for_each_plane(plane, state) {
 		struct drm_plane_state *pstate;
-
-		if (cnt >= ARRAY_SIZE(pstates)) {
+		if (cnt >= (hw_cfg->lm.nb_stages)) {
 			dev_err(dev->dev, "too many planes!\n");
 			return -EINVAL;
 		}
@@ -369,13 +411,13 @@ static int mdp5_crtc_atomic_check(struct drm_crtc *crtc,
 		 */
 		if (!pstate)
 			pstate = plane->state;
-
 		pstates[cnt].plane = plane;
 		pstates[cnt].state = to_mdp5_plane_state(pstate);
 
 		cnt++;
 	}
 
+	/* assign a stage based on sorted zpos property */
 	sort(pstates, cnt, sizeof(pstates[0]), pstate_cmp, NULL);
 
 	for (i = 0; i < cnt; i++) {

drivers/gpu/drm/msm/mdp/mdp5/mdp5_ctl.c

@@ -287,30 +287,86 @@ int mdp5_ctl_set_cursor(struct mdp5_ctl *ctl, int cursor_id, bool enable)
 		blend_cfg &= ~MDP5_CTL_LAYER_REG_CURSOR_OUT;
 
 	ctl_write(ctl, REG_MDP5_CTL_LAYER_REG(ctl->id, lm), blend_cfg);
+	ctl->cursor_on = enable;
 
 	spin_unlock_irqrestore(&ctl->hw_lock, flags);
 
 	ctl->pending_ctl_trigger = mdp_ctl_flush_mask_cursor(cursor_id);
-	ctl->cursor_on = enable;
 
 	return 0;
 }
 
-int mdp5_ctl_blend(struct mdp5_ctl *ctl, u32 lm, u32 blend_cfg)
+static u32 mdp_ctl_blend_mask(enum mdp5_pipe pipe,
+		enum mdp_mixer_stage_id stage)
+{
+	switch (pipe) {
+	case SSPP_VIG0: return MDP5_CTL_LAYER_REG_VIG0(stage);
+	case SSPP_VIG1: return MDP5_CTL_LAYER_REG_VIG1(stage);
+	case SSPP_VIG2: return MDP5_CTL_LAYER_REG_VIG2(stage);
+	case SSPP_RGB0: return MDP5_CTL_LAYER_REG_RGB0(stage);
+	case SSPP_RGB1: return MDP5_CTL_LAYER_REG_RGB1(stage);
+	case SSPP_RGB2: return MDP5_CTL_LAYER_REG_RGB2(stage);
+	case SSPP_DMA0: return MDP5_CTL_LAYER_REG_DMA0(stage);
+	case SSPP_DMA1: return MDP5_CTL_LAYER_REG_DMA1(stage);
+	case SSPP_VIG3: return MDP5_CTL_LAYER_REG_VIG3(stage);
+	case SSPP_RGB3: return MDP5_CTL_LAYER_REG_RGB3(stage);
+	default:	return 0;
+	}
+}
+
+static u32 mdp_ctl_blend_ext_mask(enum mdp5_pipe pipe,
+		enum mdp_mixer_stage_id stage)
+{
+	if (stage < STAGE6)
+		return 0;
+
+	switch (pipe) {
+	case SSPP_VIG0: return MDP5_CTL_LAYER_EXT_REG_VIG0_BIT3;
+	case SSPP_VIG1: return MDP5_CTL_LAYER_EXT_REG_VIG1_BIT3;
+	case SSPP_VIG2: return MDP5_CTL_LAYER_EXT_REG_VIG2_BIT3;
+	case SSPP_RGB0: return MDP5_CTL_LAYER_EXT_REG_RGB0_BIT3;
+	case SSPP_RGB1: return MDP5_CTL_LAYER_EXT_REG_RGB1_BIT3;
+	case SSPP_RGB2: return MDP5_CTL_LAYER_EXT_REG_RGB2_BIT3;
+	case SSPP_DMA0: return MDP5_CTL_LAYER_EXT_REG_DMA0_BIT3;
+	case SSPP_DMA1: return MDP5_CTL_LAYER_EXT_REG_DMA1_BIT3;
+	case SSPP_VIG3: return MDP5_CTL_LAYER_EXT_REG_VIG3_BIT3;
+	case SSPP_RGB3: return MDP5_CTL_LAYER_EXT_REG_RGB3_BIT3;
+	default:	return 0;
+	}
+}
+
+int mdp5_ctl_blend(struct mdp5_ctl *ctl, u32 lm, u8 *stage, u32 stage_cnt,
+	u32 ctl_blend_op_flags)
 {
 	unsigned long flags;
+	u32 blend_cfg = 0, blend_ext_cfg = 0;
+	int i, start_stage;
+
+	if (ctl_blend_op_flags & MDP5_CTL_BLEND_OP_FLAG_BORDER_OUT) {
+		start_stage = STAGE0;
+		blend_cfg |= MDP5_CTL_LAYER_REG_BORDER_COLOR;
+	} else {
+		start_stage = STAGE_BASE;
+	}
+
+	for (i = start_stage; i < start_stage + stage_cnt; i++) {
+		blend_cfg |= mdp_ctl_blend_mask(stage[i], i);
+		blend_ext_cfg |= mdp_ctl_blend_ext_mask(stage[i], i);
+	}
 
+	spin_lock_irqsave(&ctl->hw_lock, flags);
 	if (ctl->cursor_on)
 		blend_cfg |=  MDP5_CTL_LAYER_REG_CURSOR_OUT;
-	else
-		blend_cfg &= ~MDP5_CTL_LAYER_REG_CURSOR_OUT;
 
-	spin_lock_irqsave(&ctl->hw_lock, flags);
 	ctl_write(ctl, REG_MDP5_CTL_LAYER_REG(ctl->id, lm), blend_cfg);
+	ctl_write(ctl, REG_MDP5_CTL_LAYER_EXT_REG(ctl->id, lm), blend_ext_cfg);
 	spin_unlock_irqrestore(&ctl->hw_lock, flags);
 
 	ctl->pending_ctl_trigger = mdp_ctl_flush_mask_lm(lm);
 
+	DBG("lm%d: blend config = 0x%08x. ext_cfg = 0x%08x", lm,
+		blend_cfg, blend_ext_cfg);
+
 	return 0;
 }
 

drivers/gpu/drm/msm/mdp/mdp5/mdp5_ctl.h

@@ -41,40 +41,20 @@ int mdp5_ctl_set_encoder_state(struct mdp5_ctl *ctl, bool enabled);
 
 int mdp5_ctl_set_cursor(struct mdp5_ctl *ctl, int cursor_id, bool enable);
 
-/*
- * blend_cfg (LM blender config):
- *
- * The function below allows the caller of mdp5_ctl_blend() to specify how pipes
- * are being blended according to their stage (z-order), through @blend_cfg arg.
- */
-static inline u32 mdp_ctl_blend_mask(enum mdp5_pipe pipe,
-		enum mdp_mixer_stage_id stage)
-{
-	switch (pipe) {
-	case SSPP_VIG0: return MDP5_CTL_LAYER_REG_VIG0(stage);
-	case SSPP_VIG1: return MDP5_CTL_LAYER_REG_VIG1(stage);
-	case SSPP_VIG2: return MDP5_CTL_LAYER_REG_VIG2(stage);
-	case SSPP_RGB0: return MDP5_CTL_LAYER_REG_RGB0(stage);
-	case SSPP_RGB1: return MDP5_CTL_LAYER_REG_RGB1(stage);
-	case SSPP_RGB2: return MDP5_CTL_LAYER_REG_RGB2(stage);
-	case SSPP_DMA0: return MDP5_CTL_LAYER_REG_DMA0(stage);
-	case SSPP_DMA1: return MDP5_CTL_LAYER_REG_DMA1(stage);
-	case SSPP_VIG3: return MDP5_CTL_LAYER_REG_VIG3(stage);
-	case SSPP_RGB3: return MDP5_CTL_LAYER_REG_RGB3(stage);
-	default:	return 0;
-	}
-}
-
 /*
  * mdp5_ctl_blend() - Blend multiple layers on a Layer Mixer (LM)
  *
- * @blend_cfg: see LM blender config definition below
+ * @stage: array to contain the pipe num for each stage
+ * @stage_cnt: valid stage number in stage array
+ * @ctl_blend_op_flags: blender operation mode flags
  *
  * Note:
  * CTL registers need to be flushed after calling this function
  * (call mdp5_ctl_commit() with mdp_ctl_flush_mask_ctl() mask)
  */
-int mdp5_ctl_blend(struct mdp5_ctl *ctl, u32 lm, u32 blend_cfg);
+#define MDP5_CTL_BLEND_OP_FLAG_BORDER_OUT	BIT(0)
+int mdp5_ctl_blend(struct mdp5_ctl *ctl, u32 lm, u8 *stage, u32 stage_cnt,
+	u32 ctl_blend_op_flags);
 
 /**
  * mdp_ctl_flush_mask...() - Register FLUSH masks

drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h

@@ -70,18 +70,12 @@ struct mdp5_kms {
 struct mdp5_plane_state {
 	struct drm_plane_state base;
 
-	/* "virtual" zpos.. we calculate actual mixer-stage at runtime
-	 * by sorting the attached planes by zpos and then assigning
-	 * mixer stage lowest to highest.  Private planes get default
-	 * zpos of zero, and public planes a unique value that is
-	 * greater than zero.  This way, things work out if a naive
-	 * userspace assigns planes to a crtc without setting zpos.
-	 */
-	int zpos;
+	/* aligned with property */
+	uint8_t premultiplied;
+	uint8_t zpos;
+	uint8_t alpha;
 
-	/* the actual mixer stage, calculated in crtc->atomic_check()
-	 * NOTE: this should move to mdp5_crtc_state, when that exists
-	 */
+	/* assigned by crtc blender */
 	enum mdp_mixer_stage_id stage;
 
 	/* some additional transactional status to help us know in the

drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c

@@ -68,14 +68,103 @@ static void mdp5_plane_destroy(struct drm_plane *plane)
 static void mdp5_plane_install_properties(struct drm_plane *plane,
 		struct drm_mode_object *obj)
 {
-	// XXX
+	struct drm_device *dev = plane->dev;
+	struct msm_drm_private *dev_priv = dev->dev_private;
+	struct drm_property *prop;
+
+#define INSTALL_PROPERTY(name, NAME, init_val, fnc, ...) do { \
+		prop = dev_priv->plane_property[PLANE_PROP_##NAME]; \
+		if (!prop) { \
+			prop = drm_property_##fnc(dev, 0, #name, \
+				##__VA_ARGS__); \
+			if (!prop) { \
+				dev_warn(dev->dev, \
+					"Create property %s failed\n", \
+					#name); \
+				return; \
+			} \
+			dev_priv->plane_property[PLANE_PROP_##NAME] = prop; \
+		} \
+		drm_object_attach_property(&plane->base, prop, init_val); \
+	} while (0)
+
+#define INSTALL_RANGE_PROPERTY(name, NAME, min, max, init_val) \
+		INSTALL_PROPERTY(name, NAME, init_val, \
+				create_range, min, max)
+
+#define INSTALL_ENUM_PROPERTY(name, NAME, init_val) \
+		INSTALL_PROPERTY(name, NAME, init_val, \
+				create_enum, name##_prop_enum_list, \
+				ARRAY_SIZE(name##_prop_enum_list))
+
+	INSTALL_RANGE_PROPERTY(zpos, ZPOS, 1, 255, 1);
+
+#undef INSTALL_RANGE_PROPERTY
+#undef INSTALL_ENUM_PROPERTY
+#undef INSTALL_PROPERTY
 }
 
-int mdp5_plane_set_property(struct drm_plane *plane,
+static int mdp5_plane_atomic_set_property(struct drm_plane *plane,
+		struct drm_plane_state *state, struct drm_property *property,
+		uint64_t val)
+{
+	struct drm_device *dev = plane->dev;
+	struct mdp5_plane_state *pstate;
+	struct msm_drm_private *dev_priv = dev->dev_private;
+	int ret = 0;
+
+	pstate = to_mdp5_plane_state(state);
+
+#define SET_PROPERTY(name, NAME, type) do { \
+		if (dev_priv->plane_property[PLANE_PROP_##NAME] == property) { \
+			pstate->name = (type)val; \
+			DBG("Set property %s %d", #name, (type)val); \
+			goto done; \
+		} \
+	} while (0)
+
+	SET_PROPERTY(zpos, ZPOS, uint8_t);
+
+	dev_err(dev->dev, "Invalid property\n");
+	ret = -EINVAL;
+done:
+	return ret;
+#undef SET_PROPERTY
+}
+
+static int mdp5_plane_set_property(struct drm_plane *plane,
 		struct drm_property *property, uint64_t val)
 {
-	// XXX
-	return -EINVAL;
+	return mdp5_plane_atomic_set_property(plane, plane->state, property,
+		val);
+}
+
+static int mdp5_plane_atomic_get_property(struct drm_plane *plane,
+		const struct drm_plane_state *state,
+		struct drm_property *property, uint64_t *val)
+{
+	struct drm_device *dev = plane->dev;
+	struct mdp5_plane_state *pstate;
+	struct msm_drm_private *dev_priv = dev->dev_private;
+	int ret = 0;
+
+	pstate = to_mdp5_plane_state(state);
+
+#define GET_PROPERTY(name, NAME, type) do { \
+		if (dev_priv->plane_property[PLANE_PROP_##NAME] == property) { \
+			*val = pstate->name; \
+			DBG("Get property %s %lld", #name, *val); \
+			goto done; \
+		} \
+	} while (0)
+
+	GET_PROPERTY(zpos, ZPOS, uint8_t);
+
+	dev_err(dev->dev, "Invalid property\n");
+	ret = -EINVAL;
+done:
+	return ret;
+#undef SET_PROPERTY
 }
 
 static void mdp5_plane_reset(struct drm_plane *plane)
@@ -88,11 +177,15 @@ static void mdp5_plane_reset(struct drm_plane *plane)
 	kfree(to_mdp5_plane_state(plane->state));
 	mdp5_state = kzalloc(sizeof(*mdp5_state), GFP_KERNEL);
 
-	if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
-		mdp5_state->zpos = 0;
-	} else {
-		mdp5_state->zpos = 1 + drm_plane_index(plane);
-	}
+	/* assign default blend parameters */
+	mdp5_state->alpha = 255;
+	mdp5_state->premultiplied = 0;
+
+	if (plane->type == DRM_PLANE_TYPE_PRIMARY)
+		mdp5_state->zpos = STAGE_BASE;
+	else
+		mdp5_state->zpos = STAGE0 + drm_plane_index(plane);
+
 	mdp5_state->base.plane = plane;
 
 	plane->state = &mdp5_state->base;
@@ -132,6 +225,8 @@ static const struct drm_plane_funcs mdp5_plane_funcs = {
 		.disable_plane = drm_atomic_helper_disable_plane,
 		.destroy = mdp5_plane_destroy,
 		.set_property = mdp5_plane_set_property,
+		.atomic_set_property = mdp5_plane_atomic_set_property,
+		.atomic_get_property = mdp5_plane_atomic_get_property,
 		.reset = mdp5_plane_reset,
 		.atomic_duplicate_state = mdp5_plane_duplicate_state,
 		.atomic_destroy_state = mdp5_plane_destroy_state,

drivers/gpu/drm/msm/msm_drv.h

@@ -64,6 +64,13 @@ struct msm_file_private {
 	int dummy;
 };
 
+enum msm_mdp_plane_property {
+	PLANE_PROP_ZPOS,
+	PLANE_PROP_ALPHA,
+	PLANE_PROP_PREMULTIPLIED,
+	PLANE_PROP_MAX_NUM
+};
+
 struct msm_drm_private {
 
 	struct msm_kms *kms;
@@ -128,6 +135,9 @@ struct msm_drm_private {
 	unsigned int num_connectors;
 	struct drm_connector *connectors[8];
 
+	/* Properties */
+	struct drm_property *plane_property[PLANE_PROP_MAX_NUM];
+
 	/* VRAM carveout, used when no IOMMU: */
 	struct {
 		unsigned long size;