[PATCH v4 06/10] drm/vs: add vs plane api

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add plane funs and helper funs
add vs drm common struct and funs

Signed-off-by: keith <keith.zhao@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/verisilicon/Makefile   |   3 +-
 drivers/gpu/drm/verisilicon/vs_drv.h   |  93 +++++
 drivers/gpu/drm/verisilicon/vs_plane.c | 487 +++++++++++++++++++++++++
 drivers/gpu/drm/verisilicon/vs_plane.h |  26 ++
 4 files changed, 608 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/verisilicon/vs_drv.h
 create mode 100644 drivers/gpu/drm/verisilicon/vs_plane.c
 create mode 100644 drivers/gpu/drm/verisilicon/vs_plane.h

diff --git a/drivers/gpu/drm/verisilicon/Makefile b/drivers/gpu/drm/verisilicon/Makefile
index 536091f37378..1c593b943261 100644
--- a/drivers/gpu/drm/verisilicon/Makefile
+++ b/drivers/gpu/drm/verisilicon/Makefile
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
 vs_drm-objs := vs_dc_hw.o \
-		vs_modeset.o
+		vs_modeset.o \
+		vs_plane.o
 
 obj-$(CONFIG_DRM_VERISILICON_DC8200) += vs_drm.o
diff --git a/drivers/gpu/drm/verisilicon/vs_drv.h b/drivers/gpu/drm/verisilicon/vs_drv.h
new file mode 100644
index 000000000000..d9f6efa7c8f9
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_drv.h
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_DRV_H__
+#define __VS_DRV_H__
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/reset.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_managed.h>
+
+#include "vs_dc_hw.h"
+
+/*@pitch_alignment: buffer pitch alignment required by sub-devices.*/
+struct vs_drm_device {
+	struct drm_device base;
+	unsigned int pitch_alignment;
+	/* clocks */
+	unsigned int clk_count;
+	struct clk_bulk_data	*clks;
+	struct reset_control	*rsts;
+	struct vs_dc dc;
+	int irq;
+};
+
+static inline struct vs_drm_device *
+to_vs_drm_private(const struct drm_device *dev)
+{
+	return container_of(dev, struct vs_drm_device, base);
+}
+
+struct vs_crtc_state {
+	struct drm_crtc_state base;
+
+	u32 output_fmt;
+	u8 encoder_type;
+	u8 bpp;
+};
+
+struct vs_crtc {
+	struct drm_crtc base;
+	struct device *dev;
+};
+
+static inline u8 to_vs_display_id(struct vs_dc *dc, struct drm_crtc *crtc)
+{
+	u8 panel_num = dc->hw.info->panel_num;
+	u32 index = drm_crtc_index(crtc);
+	int i;
+
+	for (i = 0; i < panel_num; i++) {
+		if (index == dc->crtc[i]->base.index)
+			return i;
+	}
+
+	return 0;
+}
+
+static inline struct vs_crtc_state *
+to_vs_crtc_state(struct drm_crtc_state *state)
+{
+	return container_of(state, struct vs_crtc_state, base);
+}
+
+struct vs_plane_state {
+	struct drm_plane_state base;
+	dma_addr_t dma_addr[DRM_FORMAT_MAX_PLANES];
+};
+
+struct vs_plane {
+	struct drm_plane base;
+	u8 id;
+};
+
+static inline struct vs_plane *to_vs_plane(struct drm_plane *plane)
+{
+	return container_of(plane, struct vs_plane, base);
+}
+
+static inline struct vs_plane_state *
+to_vs_plane_state(struct drm_plane_state *state)
+{
+	return container_of(state, struct vs_plane_state, base);
+}
+
+#endif /* __VS_DRV_H__ */
diff --git a/drivers/gpu/drm/verisilicon/vs_plane.c b/drivers/gpu/drm/verisilicon/vs_plane.c
new file mode 100644
index 000000000000..653f0ce72ed6
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_plane.c
@@ -0,0 +1,487 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_blend.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_fb_dma_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_plane.h>
+#include <drm/drm_plane_helper.h>
+
+#include "vs_plane.h"
+
+static void vs_plane_atomic_destroy_state(struct drm_plane *plane,
+					  struct drm_plane_state *state)
+{
+	struct vs_plane_state *vs_plane_state = to_vs_plane_state(state);
+
+	__drm_atomic_helper_plane_destroy_state(state);
+	kfree(vs_plane_state);
+}
+
+static void vs_plane_reset(struct drm_plane *plane)
+{
+	struct vs_plane_state *state;
+	struct vs_plane *vs_plane = to_vs_plane(plane);
+
+	if (plane->state)
+		vs_plane_atomic_destroy_state(plane, plane->state);
+
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return;
+
+	state->base.zpos = vs_plane->id;
+	__drm_atomic_helper_plane_reset(plane, &state->base);
+}
+
+static struct drm_plane_state *
+vs_plane_atomic_duplicate_state(struct drm_plane *plane)
+{
+	struct vs_plane_state *state;
+
+	if (WARN_ON(!plane->state))
+		return NULL;
+
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return NULL;
+
+	__drm_atomic_helper_plane_duplicate_state(plane, &state->base);
+
+	return &state->base;
+}
+
+static bool vs_format_mod_supported(struct drm_plane *plane,
+				    u32 format,
+				    u64 modifier)
+{
+	int i;
+
+	/* We always have to allow these modifiers:
+	 * 1. Core DRM checks for LINEAR support if userspace does not provide modifiers.
+	 * 2. Not passing any modifiers is the same as explicitly passing INVALID.
+	 */
+	if (modifier == DRM_FORMAT_MOD_LINEAR)
+		return true;
+
+	/* Check that the modifier is on the list of the plane's supported modifiers. */
+	for (i = 0; i < plane->modifier_count; i++) {
+		if (modifier == plane->modifiers[i])
+			break;
+	}
+
+	if (i == plane->modifier_count)
+		return false;
+
+	return true;
+}
+
+const struct drm_plane_funcs vs_plane_funcs = {
+	.update_plane		= drm_atomic_helper_update_plane,
+	.disable_plane		= drm_atomic_helper_disable_plane,
+	.reset			= vs_plane_reset,
+	.atomic_duplicate_state = vs_plane_atomic_duplicate_state,
+	.atomic_destroy_state	= vs_plane_atomic_destroy_state,
+	.format_mod_supported	= vs_format_mod_supported,
+};
+
+static unsigned char vs_get_plane_number(struct drm_framebuffer *fb)
+{
+	const struct drm_format_info *info;
+
+	if (!fb)
+		return 0;
+
+	info = drm_format_info(fb->format->format);
+	if (!info || info->num_planes > DRM_FORMAT_MAX_PLANES)
+		return 0;
+
+	return info->num_planes;
+}
+
+static bool vs_dc_mod_supported(const u64 *info_modifiers, u64 modifier)
+{
+	const u64 *mods;
+
+	if (!info_modifiers)
+		return false;
+
+	for (mods = info_modifiers; *mods != DRM_FORMAT_MOD_INVALID; mods++) {
+		if (*mods == modifier)
+			return true;
+	}
+
+	return false;
+}
+
+static int vs_primary_plane_atomic_check(struct drm_plane *plane, struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
+	struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+	struct vs_dc *dc = &priv->dc;
+	struct drm_framebuffer *fb = new_state->fb;
+	const struct vs_plane_primary_info *primary_info;
+	struct drm_crtc_state *crtc_state;
+	int i;
+
+	if (!new_state->crtc || !new_state->fb)
+		return 0;
+	for (i = 0; i < dc->hw.info->primary_num; i++) {
+		primary_info = (struct vs_plane_primary_info *)&dc->hw.info->primary[i];
+		if (primary_info->id == to_vs_plane(plane)->id)
+			break;
+	}
+
+	primary_info = &dc->hw.info->primary[i];
+
+	if (fb->width < primary_info->min_width ||
+	    fb->width > primary_info->max_width ||
+	    fb->height < primary_info->min_height ||
+	    fb->height > primary_info->max_height)
+		drm_err_once(plane->dev, "buffer size may not support on plane%d.\n",
+			     to_vs_plane(plane)->id);
+
+	if (!vs_dc_mod_supported(primary_info->modifiers, fb->modifier)) {
+		drm_err(plane->dev, "unsupported modifier on plane%d.\n", to_vs_plane(plane)->id);
+		return -EINVAL;
+	}
+
+	crtc_state = drm_atomic_get_existing_crtc_state(new_state->state, new_state->crtc);
+	return drm_atomic_helper_check_plane_state(new_state, crtc_state,
+						   primary_info->min_scale,
+						   primary_info->max_scale,
+						   true, true);
+}
+
+static int vs_overlay_plane_atomic_check(struct drm_plane *plane, struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
+	struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+	struct vs_dc *dc = &priv->dc;
+	struct drm_framebuffer *fb = new_state->fb;
+	const struct vs_plane_overlay_info *overlay_info;
+	struct drm_crtc_state *crtc_state;
+	int i;
+
+	if (!new_state->crtc || !new_state->fb)
+		return 0;
+
+	for (i = 0; i < dc->hw.info->overlay_num; i++) {
+		overlay_info = (struct vs_plane_overlay_info *)&dc->hw.info->overlay[i];
+		if (overlay_info->id == to_vs_plane(plane)->id)
+			break;
+	}
+
+	overlay_info = &dc->hw.info->overlay[i];
+
+	if (fb->width < overlay_info->min_width ||
+	    fb->width > overlay_info->max_width ||
+	    fb->height < overlay_info->min_height ||
+	    fb->height > overlay_info->max_height)
+		drm_err_once(plane->dev, "buffer size may not support on plane%d.\n",
+			     to_vs_plane(plane)->id);
+
+	if (!vs_dc_mod_supported(overlay_info->modifiers, fb->modifier)) {
+		drm_err(plane->dev, "unsupported modifier on plane%d.\n", to_vs_plane(plane)->id);
+		return -EINVAL;
+}
+
+	crtc_state = drm_atomic_get_existing_crtc_state(new_state->state, new_state->crtc);
+	return drm_atomic_helper_check_plane_state(new_state, crtc_state,
+						   overlay_info->min_scale,
+						   overlay_info->max_scale,
+						   true, true);
+}
+
+static int vs_cursor_plane_atomic_check(struct drm_plane *plane, struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
+	struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+	struct vs_dc *dc = &priv->dc;
+	struct drm_framebuffer *fb = new_state->fb;
+	const struct vs_plane_cursor_info *cursor_info;
+	struct drm_crtc_state *crtc_state;
+	int i;
+
+	if (!new_state->crtc || !new_state->fb)
+		return 0;
+
+	for (i = 0; i < dc->hw.info->cursor_num; i++) {
+		cursor_info = (struct vs_plane_cursor_info *)&dc->hw.info->cursor[i];
+		if (cursor_info->id == to_vs_plane(plane)->id)
+			break;
+	}
+
+	cursor_info = &dc->hw.info->cursor[i];
+
+	if (fb->width < cursor_info->min_width ||
+	    fb->width > cursor_info->max_width ||
+	    fb->height < cursor_info->min_height ||
+	    fb->height > cursor_info->max_height)
+		drm_err_once(plane->dev, "buffer size may not support on plane%d.\n",
+			     to_vs_plane(plane)->id);
+
+	crtc_state = drm_atomic_get_existing_crtc_state(new_state->state, new_state->crtc);
+	return drm_atomic_helper_check_plane_state(new_state, crtc_state,
+						   DRM_PLANE_NO_SCALING,
+						   DRM_PLANE_NO_SCALING,
+						   true, true);
+}
+
+static void vs_plane_atomic_update(struct drm_plane *plane, struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
+
+	unsigned char i, num_planes, display_id, id;
+	u32 format;
+	bool is_yuv;
+	struct vs_plane *vs_plane = to_vs_plane(plane);
+	struct vs_plane_state *plane_state = to_vs_plane_state(new_state);
+	struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+	struct vs_dc *dc = &priv->dc;
+
+	if (!new_state->fb || !new_state->crtc)
+		return;
+
+	drm_fb_dma_sync_non_coherent(plane->dev, old_state, new_state);
+
+	num_planes = vs_get_plane_number(new_state->fb);
+
+	for (i = 0; i < num_planes; i++) {
+		dma_addr_t dma_addr;
+
+		dma_addr = drm_fb_dma_get_gem_addr(new_state->fb, new_state, i);
+		plane_state->dma_addr[i] = dma_addr;
+	}
+
+	display_id = to_vs_display_id(dc, new_state->crtc);
+	format = new_state->fb->format->format;
+	is_yuv = new_state->fb->format->is_yuv;
+	id = vs_plane->id;
+
+	plane_hw_update_format_colorspace(dc, format, new_state->color_encoding, id, is_yuv);
+	if (new_state->visible)
+		plane_hw_update_address(dc, id, format, plane_state->dma_addr,
+					new_state->fb, &new_state->src);
+	plane_hw_update_format(dc, format, new_state->color_encoding, new_state->rotation,
+			       new_state->visible, new_state->zpos, id, display_id);
+	plane_hw_update_scale(dc, &new_state->src, &new_state->dst, id,
+			      display_id, new_state->rotation);
+	plane_hw_update_blend(dc, new_state->alpha, new_state->pixel_blend_mode,
+			      id, display_id);
+}
+
+static void vs_cursor_plane_atomic_update(struct drm_plane *plane, struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
+									   plane);
+	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
+									   plane);
+	struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+	struct vs_dc *dc = &priv->dc;
+	unsigned char display_id;
+	u32 crtc_w, crtc_x, crtc_y;
+	s32 hotspot_x, hotspot_y;
+	dma_addr_t dma_addr;
+
+	display_id = to_vs_display_id(dc, new_state->crtc);
+
+	if (!new_state->fb || !new_state->crtc)
+		return;
+
+	drm_fb_dma_sync_non_coherent(new_state->fb->dev, old_state, new_state);
+	dma_addr = drm_fb_dma_get_gem_addr(new_state->fb, new_state, 0);
+	crtc_w = new_state->crtc_w;
+
+	if (new_state->crtc_x > 0) {
+		crtc_x = new_state->crtc_x;
+		hotspot_x = 0;
+	} else {
+		hotspot_x = -new_state->crtc_x;
+		crtc_x = 0;
+	}
+	if (new_state->crtc_y > 0) {
+		crtc_y = new_state->crtc_y;
+		hotspot_y = 0;
+	} else {
+		hotspot_y = -new_state->crtc_y;
+		crtc_y = 0;
+	}
+	dc_hw_update_cursor(&dc->hw, display_id, dma_addr, crtc_w, crtc_x,
+			    crtc_y, hotspot_x, hotspot_y);
+}
+
+static void vs_plane_atomic_disable(struct drm_plane *plane, struct drm_atomic_state *state)
+{
+	struct vs_plane *vs_plane = to_vs_plane(plane);
+	struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+	struct vs_dc *dc = &priv->dc;
+
+	dc_hw_disable_plane(dc, vs_plane->id);
+}
+
+static void vs_cursor_plane_atomic_disable(struct drm_plane *plane, struct drm_atomic_state *state)
+{
+	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
+	struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+	struct vs_dc *dc = &priv->dc;
+	unsigned char display_id;
+
+	display_id = to_vs_display_id(dc, old_state->crtc);
+	dc_hw_disable_cursor(&dc->hw, display_id);
+}
+
+const struct drm_plane_helper_funcs primary_plane_helpers = {
+	.atomic_check	= vs_primary_plane_atomic_check,
+	.atomic_update	= vs_plane_atomic_update,
+	.atomic_disable = vs_plane_atomic_disable,
+};
+
+const struct drm_plane_helper_funcs overlay_plane_helpers = {
+	.atomic_check	= vs_overlay_plane_atomic_check,
+	.atomic_update	= vs_plane_atomic_update,
+	.atomic_disable = vs_plane_atomic_disable,
+};
+
+const struct drm_plane_helper_funcs cursor_plane_helpers = {
+	.atomic_check	= vs_cursor_plane_atomic_check,
+	.atomic_update	= vs_cursor_plane_atomic_update,
+	.atomic_disable = vs_cursor_plane_atomic_disable,
+};
+
+struct vs_plane *vs_plane_primary_create(struct drm_device *drm_dev,
+					 struct vs_plane_primary_info *info,
+					 unsigned int layer_num,
+					 unsigned int possible_crtcs)
+{
+	struct vs_plane *plane;
+	int ret;
+
+	if (!info)
+		return NULL;
+
+	plane = drmm_universal_plane_alloc(drm_dev, struct vs_plane, base,
+					   possible_crtcs,
+					   &vs_plane_funcs,
+					   info->formats, info->num_formats,
+					   info->modifiers, DRM_PLANE_TYPE_PRIMARY,
+					   NULL);
+	if (IS_ERR(plane))
+		return ERR_CAST(plane);
+
+	drm_plane_helper_add(&plane->base, &primary_plane_helpers);
+
+	drm_plane_create_alpha_property(&plane->base);
+	drm_plane_create_blend_mode_property(&plane->base,
+					     BIT(DRM_MODE_BLEND_PIXEL_NONE) |
+					     BIT(DRM_MODE_BLEND_PREMULTI) |
+					     BIT(DRM_MODE_BLEND_COVERAGE));
+
+	if (info->color_encoding) {
+		ret = drm_plane_create_color_properties(&plane->base, info->color_encoding,
+							BIT(DRM_COLOR_YCBCR_LIMITED_RANGE),
+							DRM_COLOR_YCBCR_BT709,
+							DRM_COLOR_YCBCR_LIMITED_RANGE);
+		if (ret)
+			return NULL;
+	}
+
+	if (info->rotation) {
+		ret = drm_plane_create_rotation_property(&plane->base,
+							 DRM_MODE_ROTATE_0,
+							 info->rotation);
+		if (ret)
+			return NULL;
+	}
+
+	ret = drm_plane_create_zpos_property(&plane->base, info->zpos, 0, layer_num - 1);
+	if (ret)
+		return NULL;
+
+	return plane;
+}
+
+struct vs_plane *vs_plane_overlay_create(struct drm_device *drm_dev,
+					 struct vs_plane_overlay_info *info,
+					 unsigned int layer_num,
+					 unsigned int possible_crtcs)
+{
+	struct vs_plane *plane;
+	int ret;
+
+	if (!info)
+		return NULL;
+
+	plane = drmm_universal_plane_alloc(drm_dev, struct vs_plane, base,
+					   possible_crtcs,
+					   &vs_plane_funcs,
+					   info->formats, info->num_formats,
+					   info->modifiers, DRM_PLANE_TYPE_OVERLAY,
+					   NULL);
+	if (IS_ERR(plane))
+		return ERR_CAST(plane);
+
+	drm_plane_helper_add(&plane->base, &overlay_plane_helpers);
+
+	drm_plane_create_alpha_property(&plane->base);
+	drm_plane_create_blend_mode_property(&plane->base,
+					     BIT(DRM_MODE_BLEND_PIXEL_NONE) |
+					     BIT(DRM_MODE_BLEND_PREMULTI) |
+					     BIT(DRM_MODE_BLEND_COVERAGE));
+
+	if (info->color_encoding) {
+		ret = drm_plane_create_color_properties(&plane->base, info->color_encoding,
+							BIT(DRM_COLOR_YCBCR_LIMITED_RANGE),
+							DRM_COLOR_YCBCR_BT709,
+							DRM_COLOR_YCBCR_LIMITED_RANGE);
+		if (ret)
+			return NULL;
+	}
+
+	if (info->rotation) {
+		ret = drm_plane_create_rotation_property(&plane->base,
+							 DRM_MODE_ROTATE_0,
+							 info->rotation);
+		if (ret)
+			return NULL;
+	}
+
+	ret = drm_plane_create_zpos_property(&plane->base, info->zpos, 0, layer_num - 1);
+	if (ret)
+		return NULL;
+
+	return plane;
+}
+
+struct vs_plane *vs_plane_cursor_create(struct drm_device *drm_dev,
+					struct vs_plane_cursor_info *info,
+					unsigned int possible_crtcs)
+{
+	struct vs_plane *plane;
+	int ret;
+
+	if (!info)
+		return NULL;
+
+	plane = drmm_universal_plane_alloc(drm_dev, struct vs_plane, base,
+					   possible_crtcs,
+					   &vs_plane_funcs,
+					   info->formats, info->num_formats,
+					   NULL, DRM_PLANE_TYPE_CURSOR,
+					   NULL);
+	if (IS_ERR(plane))
+		return ERR_CAST(plane);
+
+	drm_plane_helper_add(&plane->base, &cursor_plane_helpers);
+
+	ret = drm_plane_create_zpos_immutable_property(&plane->base, info->zpos);
+	if (ret)
+		return NULL;
+
+	return plane;
+}
diff --git a/drivers/gpu/drm/verisilicon/vs_plane.h b/drivers/gpu/drm/verisilicon/vs_plane.h
new file mode 100644
index 000000000000..0416146226a8
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_plane.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_PLANE_H__
+#define __VS_PLANE_H__
+
+#include <drm/drm_plane_helper.h>
+
+#include "vs_drv.h"
+
+struct vs_plane *vs_plane_primary_create(struct drm_device *drm_dev,
+					 struct vs_plane_primary_info *info,
+					 unsigned int layer_num,
+					 unsigned int possible_crtcs);
+
+struct vs_plane *vs_plane_overlay_create(struct drm_device *drm_dev,
+					 struct vs_plane_overlay_info *info,
+					 unsigned int layer_num,
+					 unsigned int possible_crtcs);
+
+struct vs_plane *vs_plane_cursor_create(struct drm_device *drm_dev,
+					struct vs_plane_cursor_info *info,
+					unsigned int possible_crtcs);
+#endif /* __VS_PLANE_H__ */
-- 
2.27.0




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