libweston/compositor-drm.c

/*
 * Copyright © 2008-2011 Kristian Høgsberg
 * Copyright © 2011 Intel Corporation
 * Copyright © 2017, 2018 Collabora, Ltd.
 * Copyright © 2017, 2018 General Electric Company
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "config.h"

#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/input.h>
#include <linux/vt.h>
#include <assert.h>
#include <sys/mman.h>
#include <dlfcn.h>
#include <time.h>

#include <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_fourcc.h>
#include <drm_fourcc_imx.h>
#include <libdrm/drm_mode_imx.h>

#include <gbm.h>
#include <libudev.h>

#include "compositor/weston.h"
#include "compositor.h"
#include "compositor-drm.h"
#include "shared/helpers.h"
#include "shared/timespec-util.h"

#if defined(ENABLE_IMXGPU)
#if defined(ENABLE_OPENGL)
#include "gl-renderer.h"
#endif
#if defined(ENABLE_IMXG2D)
#include "g2d-renderer.h"
#endif
#endif

#include "weston-egl-ext.h"
#include "pixman-renderer.h"
#include "pixel-formats.h"
#include "libbacklight.h"
#include "libinput-seat.h"
#include "launcher-util.h"
#include "vaapi-recorder.h"
#include "presentation-time-server-protocol.h"
#include "linux-dmabuf.h"
#include "linux-dmabuf-unstable-v1-server-protocol.h"
#include "hdr10-metadata-unstable-v1-server-protocol.h"

#ifndef DRM_CLIENT_CAP_ASPECT_RATIO
#define DRM_CLIENT_CAP_ASPECT_RATIO	4
#endif

#ifndef GBM_BO_USE_CURSOR
#define GBM_BO_USE_CURSOR GBM_BO_USE_CURSOR_64X64
#endif

#define MAX_CLONED_CONNECTORS 4

/**
 * aspect ratio info taken from the drmModeModeInfo flag bits 19-22,
 * which should be used to fill the aspect ratio field in weston_mode.
 */
#define DRM_MODE_FLAG_PIC_AR_BITS_POS	19
#ifndef DRM_MODE_FLAG_PIC_AR_MASK
#define DRM_MODE_FLAG_PIC_AR_MASK (0xF << DRM_MODE_FLAG_PIC_AR_BITS_POS)
#endif

#define ALIGNTO(a, b) ((a + (b-1)) & (~(b-1)))

/**
 * Represents the values of an enum-type KMS property
 */
struct drm_property_enum_info {
	const char *name; /**< name as string (static, not freed) */
	bool valid; /**< true if value is supported; ignore if false */
	uint64_t value; /**< raw value */
};

/**
 * Holds information on a DRM property, including its ID and the enum
 * values it holds.
 *
 * DRM properties are allocated dynamically, and maintained as DRM objects
 * within the normal object ID space; they thus do not have a stable ID
 * to refer to. This includes enum values, which must be referred to by
 * integer values, but these are not stable.
 *
 * drm_property_info allows a cache to be maintained where Weston can use
 * enum values internally to refer to properties, with the mapping to DRM
 * ID values being maintained internally.
 */
struct drm_property_info {
	const char *name; /**< name as string (static, not freed) */
	uint32_t prop_id; /**< KMS property object ID */
	unsigned int num_enum_values; /**< number of enum values */
	struct drm_property_enum_info *enum_values; /**< array of enum values */
};

/**
 * List of properties attached to DRM planes
 */
enum wdrm_plane_property {
	WDRM_PLANE_TYPE = 0,
	WDRM_PLANE_SRC_X,
	WDRM_PLANE_SRC_Y,
	WDRM_PLANE_SRC_W,
	WDRM_PLANE_SRC_H,
	WDRM_PLANE_CRTC_X,
	WDRM_PLANE_CRTC_Y,
	WDRM_PLANE_CRTC_W,
	WDRM_PLANE_CRTC_H,
	WDRM_PLANE_FB_ID,
	WDRM_PLANE_CRTC_ID,
	WDRM_PLANE_IN_FORMATS,
	WDRM_PLANE_IN_FENCE_FD,
	WDRM_PLANE_DTRC_META,
	WDRM_PLANE__COUNT
};

/**
 * Possible values for the WDRM_PLANE_TYPE property.
 */
enum wdrm_plane_type {
	WDRM_PLANE_TYPE_PRIMARY = 0,
	WDRM_PLANE_TYPE_CURSOR,
	WDRM_PLANE_TYPE_OVERLAY,
	WDRM_PLANE_TYPE__COUNT
};

static struct drm_property_enum_info plane_type_enums[] = {
	[WDRM_PLANE_TYPE_PRIMARY] = {
		.name = "Primary",
	},
	[WDRM_PLANE_TYPE_OVERLAY] = {
		.name = "Overlay",
	},
	[WDRM_PLANE_TYPE_CURSOR] = {
		.name = "Cursor",
	},
};

static const struct drm_property_info plane_props[] = {
	[WDRM_PLANE_TYPE] = {
		.name = "type",
		.enum_values = plane_type_enums,
		.num_enum_values = WDRM_PLANE_TYPE__COUNT,
	},
	[WDRM_PLANE_SRC_X] = { .name = "SRC_X", },
	[WDRM_PLANE_SRC_Y] = { .name = "SRC_Y", },
	[WDRM_PLANE_SRC_W] = { .name = "SRC_W", },
	[WDRM_PLANE_SRC_H] = { .name = "SRC_H", },
	[WDRM_PLANE_CRTC_X] = { .name = "CRTC_X", },
	[WDRM_PLANE_CRTC_Y] = { .name = "CRTC_Y", },
	[WDRM_PLANE_CRTC_W] = { .name = "CRTC_W", },
	[WDRM_PLANE_CRTC_H] = { .name = "CRTC_H", },
	[WDRM_PLANE_FB_ID] = { .name = "FB_ID", },
	[WDRM_PLANE_CRTC_ID] = { .name = "CRTC_ID", },
	[WDRM_PLANE_IN_FORMATS] = { .name = "IN_FORMATS" },
	[WDRM_PLANE_IN_FENCE_FD] = { .name = "IN_FENCE_FD" },
	[WDRM_PLANE_DTRC_META] = { .name = "dtrc_table_ofs" },
};

/**
 * List of properties attached to a DRM connector
 */
enum wdrm_connector_property {
	WDRM_CONNECTOR_EDID = 0,
	WDRM_CONNECTOR_DPMS,
	WDRM_CONNECTOR_CRTC_ID,
	WDRM_CONNECTOR_HDR10_METADATA,
	WDRM_CONNECTOR__COUNT
};

enum wdrm_dpms_state {
	WDRM_DPMS_STATE_OFF = 0,
	WDRM_DPMS_STATE_ON,
	WDRM_DPMS_STATE_STANDBY, /* unused */
	WDRM_DPMS_STATE_SUSPEND, /* unused */
	WDRM_DPMS_STATE__COUNT
};

static struct drm_property_enum_info dpms_state_enums[] = {
	[WDRM_DPMS_STATE_OFF] = {
		.name = "Off",
	},
	[WDRM_DPMS_STATE_ON] = {
		.name = "On",
	},
	[WDRM_DPMS_STATE_STANDBY] = {
		.name = "Standby",
	},
	[WDRM_DPMS_STATE_SUSPEND] = {
		.name = "Suspend",
	},
};

static const struct drm_property_info connector_props[] = {
	[WDRM_CONNECTOR_EDID] = { .name = "EDID" },
	[WDRM_CONNECTOR_DPMS] = {
		.name = "DPMS",
		.enum_values = dpms_state_enums,
		.num_enum_values = WDRM_DPMS_STATE__COUNT,
	},
	[WDRM_CONNECTOR_CRTC_ID] = { .name = "CRTC_ID", },
	[WDRM_CONNECTOR_HDR10_METADATA] = { .name = "HDR_SOURCE_METADATA", },
};

/**
 * List of properties attached to DRM CRTCs
 */
enum wdrm_crtc_property {
	WDRM_CRTC_MODE_ID = 0,
	WDRM_CRTC_ACTIVE,
	WDRM_CRTC__COUNT
};

static const struct drm_property_info crtc_props[] = {
	[WDRM_CRTC_MODE_ID] = { .name = "MODE_ID", },
	[WDRM_CRTC_ACTIVE] = { .name = "ACTIVE", },
};

/**
 * Mode for drm_output_state_duplicate.
 */
enum drm_output_state_duplicate_mode {
	DRM_OUTPUT_STATE_CLEAR_PLANES, /**< reset all planes to off */
	DRM_OUTPUT_STATE_PRESERVE_PLANES, /**< preserve plane state */
};

/**
 * Mode for drm_pending_state_apply and co.
 */
enum drm_state_apply_mode {
	DRM_STATE_APPLY_SYNC, /**< state fully processed */
	DRM_STATE_APPLY_ASYNC, /**< state pending event delivery */
	DRM_STATE_TEST_ONLY, /**< test if the state can be applied */
};

struct drm_backend {
	struct weston_backend base;
	struct weston_compositor *compositor;

	struct udev *udev;
	struct wl_event_source *drm_source;

	struct udev_monitor *udev_monitor;
	struct wl_event_source *udev_drm_source;

	struct {
		int id;
		int fd;
		char *filename;
	} drm;
	struct gbm_device *gbm;
	struct wl_listener session_listener;
	uint32_t gbm_format;

	/* hdr10 metadata blob id */
	unsigned int hdr_blob_id;

	/* we need these parameters in order to not fail drmModeAddFB2()
	 * due to out of bounds dimensions, and then mistakenly set
	 * sprites_are_broken:
	 */
	int min_width, max_width;
	int min_height, max_height;

	struct wl_list plane_list;
	int sprites_are_broken;
	int sprites_hidden;

	void *repaint_data;

	bool state_invalid;

	/* CRTC IDs not used by any enabled output. */
	struct wl_array unused_crtcs;

	int cursors_are_broken;

	bool universal_planes;
	bool atomic_modeset;

	int use_pixman;
#if defined(ENABLE_IMXGPU) && defined(ENABLE_IMXG2D)
	int use_g2d;
#endif
	bool use_pixman_shadow;

	struct udev_input input;

	int32_t cursor_width;
	int32_t cursor_height;

	uint32_t pageflip_timeout;

	bool shutting_down;

	bool aspect_ratio_supported;
};

struct drm_mode {
	struct weston_mode base;
	drmModeModeInfo mode_info;
	uint32_t blob_id;
};

enum drm_fb_type {
	BUFFER_INVALID = 0, /**< never used */
	BUFFER_CLIENT, /**< directly sourced from client */
	BUFFER_DMABUF, /**< imported from linux_dmabuf client */
	BUFFER_PIXMAN_DUMB, /**< internal Pixman rendering */
	BUFFER_GBM_SURFACE, /**< internal EGL rendering */
	BUFFER_CURSOR, /**< internal cursor buffer */
};

struct drm_fb {
	enum drm_fb_type type;

	int refcnt;

	uint32_t fb_id, size;
	uint32_t handles[4];
	uint32_t strides[4];
	uint32_t offsets[4];
	const struct pixel_format_info *format;
	uint64_t modifier;
	int width, height;
	int fd;
	struct weston_buffer_reference buffer_ref;

	/* Used by gbm fbs */
	struct gbm_bo *bo;
	struct gbm_surface *gbm_surface;

	/* Used by dumb fbs */
	void *map;

	uint64_t dtrc_meta;
};

struct drm_edid {
	char eisa_id[13];
	char monitor_name[13];
	char pnp_id[5];
	char serial_number[13];
};

/**
 * Pending state holds one or more drm_output_state structures, collected from
 * performing repaint. This pending state is transient, and only lives between
 * beginning a repaint group and flushing the results: after flush, each
 * output state will complete and be retired separately.
 */
struct drm_pending_state {
	struct drm_backend *backend;
	struct wl_list output_list;
};

/*
 * Output state holds the dynamic state for one Weston output, i.e. a KMS CRTC,
 * plus >= 1 each of encoder/connector/plane. Since everything but the planes
 * is currently statically assigned per-output, we mainly use this to track
 * plane state.
 *
 * pending_state is set when the output state is owned by a pending_state,
 * i.e. when it is being constructed and has not yet been applied. When the
 * output state has been applied, the owning pending_state is freed.
 */
struct drm_output_state {
	struct drm_pending_state *pending_state;
	struct drm_output *output;
	struct wl_list link;
	enum dpms_enum dpms;
	struct wl_list plane_list;
};

/**
 * Plane state holds the dynamic state for a plane: where it is positioned,
 * and which buffer it is currently displaying.
 *
 * The plane state is owned by an output state, except when setting an initial
 * state. See drm_output_state for notes on state object lifetime.
 */
struct drm_plane_state {
	struct drm_plane *plane;
	struct drm_output *output;
	struct drm_output_state *output_state;

	struct drm_fb *fb;

	struct weston_view *ev; /**< maintained for drm_assign_planes only */

	int32_t src_x, src_y;
	uint32_t src_w, src_h;
	int32_t dest_x, dest_y;
	uint32_t dest_w, dest_h;

	bool complete;

	struct wl_list link; /* drm_output_state::plane_list */
};

/**
 * A plane represents one buffer, positioned within a CRTC, and stacked
 * relative to other planes on the same CRTC.
 *
 * Each CRTC has a 'primary plane', which use used to display the classic
 * framebuffer contents, as accessed through the legacy drmModeSetCrtc
 * call (which combines setting the CRTC's actual physical mode, and the
 * properties of the primary plane).
 *
 * The cursor plane also has its own alternate legacy API.
 *
 * Other planes are used opportunistically to display content we do not
 * wish to blit into the primary plane. These non-primary/cursor planes
 * are referred to as 'sprites'.
 */
struct drm_plane {
	struct weston_plane base;

	struct drm_backend *backend;

	enum wdrm_plane_type type;

	uint32_t possible_crtcs;
	uint32_t plane_id;
	uint32_t count_formats;

	struct drm_property_info props[WDRM_PLANE__COUNT];

	/* The last state submitted to the kernel for this plane. */
	struct drm_plane_state *state_cur;

	struct wl_list link;

	uint64_t dtrc_meta;

	struct {
		uint32_t format;
		uint32_t count_modifiers;
		uint64_t *modifiers;
	} formats[];
};

struct drm_head {
	struct weston_head base;
	struct drm_backend *backend;

	drmModeConnector *connector;
	uint32_t connector_id;
	struct drm_edid edid;

	/* Holds the properties for the connector */
	struct drm_property_info props_conn[WDRM_CONNECTOR__COUNT];

	struct backlight *backlight;

	drmModeModeInfo inherited_mode;	/**< Original mode on the connector */
	uint32_t inherited_crtc_id;	/**< Original CRTC assignment */
};

struct drm_output {
	struct weston_output base;

	uint32_t crtc_id; /* object ID to pass to DRM functions */
	int pipe; /* index of CRTC in resource array / bitmasks */

	/* Holds the properties for the CRTC */
	struct drm_property_info props_crtc[WDRM_CRTC__COUNT];

	int vblank_pending;
	int page_flip_pending;
	int atomic_complete_pending;
	int destroy_pending;
	int disable_pending;
	int dpms_off_pending;

	struct drm_fb *gbm_cursor_fb[2];
	struct drm_plane *cursor_plane;
	struct weston_view *cursor_view;
	int current_cursor;

	struct gbm_surface *gbm_surface;
	uint32_t gbm_format;

	/* Plane being displayed directly on the CRTC */
	struct drm_plane *scanout_plane;

	/* The last state submitted to the kernel for this CRTC. */
	struct drm_output_state *state_cur;
	/* The previously-submitted state, where the hardware has not
	 * yet acknowledged completion of state_cur. */
	struct drm_output_state *state_last;

	struct drm_fb *dumb[2];
	pixman_image_t *image[2];
#if defined(ENABLE_IMXGPU) && defined(ENABLE_IMXG2D)
	struct g2d_surfaceEx g2d_image[2];
#endif
	int current_image;
	pixman_region32_t previous_damage;

	struct vaapi_recorder *recorder;
	struct wl_listener recorder_frame_listener;

	struct wl_event_source *pageflip_timer;
};

static const char *const aspect_ratio_as_string[] = {
	[WESTON_MODE_PIC_AR_NONE] = "",
	[WESTON_MODE_PIC_AR_4_3] = " 4:3",
	[WESTON_MODE_PIC_AR_16_9] = " 16:9",
	[WESTON_MODE_PIC_AR_64_27] = " 64:27",
	[WESTON_MODE_PIC_AR_256_135] = " 256:135",
};

#if defined(ENABLE_IMXGPU)
#if defined(ENABLE_OPENGL)
static struct gl_renderer_interface *gl_renderer;
#endif
#if defined(ENABLE_IMXG2D)
static struct g2d_renderer_interface *g2d_renderer;
#endif
#endif

static const char default_seat[] = "seat0";

static void
wl_array_remove_uint32(struct wl_array *array, uint32_t elm)
{
	uint32_t *pos, *end;

	end = (uint32_t *) ((char *) array->data + array->size);

	wl_array_for_each(pos, array) {
		if (*pos != elm)
			continue;

		array->size -= sizeof(*pos);
		if (pos + 1 == end)
			break;

		memmove(pos, pos + 1, (char *) end -  (char *) (pos + 1));
		break;
	}
}

static inline struct drm_head *
to_drm_head(struct weston_head *base)
{
	return container_of(base, struct drm_head, base);
}

static inline struct drm_output *
to_drm_output(struct weston_output *base)
{
	return container_of(base, struct drm_output, base);
}

static inline struct drm_backend *
to_drm_backend(struct weston_compositor *base)
{
	return container_of(base->backend, struct drm_backend, base);
}

static int
pageflip_timeout(void *data) {
	/*
	 * Our timer just went off, that means we're not receiving drm
	 * page flip events anymore for that output. Let's gracefully exit
	 * weston with a return value so devs can debug what's going on.
	 */
	struct drm_output *output = data;
	struct weston_compositor *compositor = output->base.compositor;

	weston_log("Pageflip timeout reached on output %s, your "
	           "driver is probably buggy!  Exiting.\n",
		   output->base.name);
	weston_compositor_exit_with_code(compositor, EXIT_FAILURE);

	return 0;
}

/* Creates the pageflip timer. Note that it isn't armed by default */
static int
drm_output_pageflip_timer_create(struct drm_output *output)
{
	struct wl_event_loop *loop = NULL;
	struct weston_compositor *ec = output->base.compositor;

	loop = wl_display_get_event_loop(ec->wl_display);
	assert(loop);
	output->pageflip_timer = wl_event_loop_add_timer(loop,
	                                                 pageflip_timeout,
	                                                 output);

	if (output->pageflip_timer == NULL) {
		weston_log("creating drm pageflip timer failed: %m\n");
		return -1;
	}

	return 0;
}

static inline struct drm_mode *
to_drm_mode(struct weston_mode *base)
{
	return container_of(base, struct drm_mode, base);
}

/**
 * Get the current value of a KMS property
 *
 * Given a drmModeObjectGetProperties return, as well as the drm_property_info
 * for the target property, return the current value of that property,
 * with an optional default. If the property is a KMS enum type, the return
 * value will be translated into the appropriate internal enum.
 *
 * If the property is not present, the default value will be returned.
 *
 * @param info Internal structure for property to look up
 * @param props Raw KMS properties for the target object
 * @param def Value to return if property is not found
 */
static uint64_t
drm_property_get_value(struct drm_property_info *info,
		       const drmModeObjectProperties *props,
		       uint64_t def)
{
	unsigned int i;

	if (info->prop_id == 0)
		return def;

	for (i = 0; i < props->count_props; i++) {
		unsigned int j;

		if (props->props[i] != info->prop_id)
			continue;

		/* Simple (non-enum) types can return the value directly */
		if (info->num_enum_values == 0)
			return props->prop_values[i];

		/* Map from raw value to enum value */
		for (j = 0; j < info->num_enum_values; j++) {
			if (!info->enum_values[j].valid)
				continue;
			if (info->enum_values[j].value != props->prop_values[i])
				continue;

			return j;
		}

		/* We don't have a mapping for this enum; return default. */
		break;
	}

	return def;
}

/**
 * Cache DRM property values
 *
 * Update a per-object array of drm_property_info structures, given the
 * DRM properties of the object.
 *
 * Call this every time an object newly appears (note that only connectors
 * can be hotplugged), the first time it is seen, or when its status changes
 * in a way which invalidates the potential property values (currently, the
 * only case for this is connector hotplug).
 *
 * This updates the property IDs and enum values within the drm_property_info
 * array.
 *
 * DRM property enum values are dynamic at runtime; the user must query the
 * property to find out the desired runtime value for a requested string
 * name. Using the 'type' field on planes as an example, there is no single
 * hardcoded constant for primary plane types; instead, the property must be
 * queried at runtime to find the value associated with the string "Primary".
 *
 * This helper queries and caches the enum values, to allow us to use a set
 * of compile-time-constant enums portably across various implementations.
 * The values given in enum_names are searched for, and stored in the
 * same-indexed field of the map array.
 *
 * @param b DRM backend object
 * @param src DRM property info array to source from
 * @param info DRM property info array to copy into
 * @param num_infos Number of entries in the source array
 * @param props DRM object properties for the object
 */
static void
drm_property_info_populate(struct drm_backend *b,
		           const struct drm_property_info *src,
			   struct drm_property_info *info,
			   unsigned int num_infos,
			   drmModeObjectProperties *props)
{
	drmModePropertyRes *prop;
	unsigned i, j;

	for (i = 0; i < num_infos; i++) {
		unsigned int j;

		info[i].name = src[i].name;
		info[i].prop_id = 0;
		info[i].num_enum_values = src[i].num_enum_values;

		if (src[i].num_enum_values == 0)
			continue;

		info[i].enum_values =
			malloc(src[i].num_enum_values *
			       sizeof(*info[i].enum_values));
		assert(info[i].enum_values);
		for (j = 0; j < info[i].num_enum_values; j++) {
			info[i].enum_values[j].name = src[i].enum_values[j].name;
			info[i].enum_values[j].valid = false;
		}
	}

	for (i = 0; i < props->count_props; i++) {
		unsigned int k;

		prop = drmModeGetProperty(b->drm.fd, props->props[i]);
		if (!prop)
			continue;

		for (j = 0; j < num_infos; j++) {
			if (!strcmp(prop->name, info[j].name))
				break;
		}

		/* We don't know/care about this property. */
		if (j == num_infos) {
#ifdef DEBUG
			weston_log("DRM debug: unrecognized property %u '%s'\n",
				   prop->prop_id, prop->name);
#endif
			drmModeFreeProperty(prop);
			continue;
		}

		if (info[j].num_enum_values == 0 &&
		    (prop->flags & DRM_MODE_PROP_ENUM)) {
			weston_log("DRM: expected property %s to not be an"
			           " enum, but it is; ignoring\n", prop->name);
			drmModeFreeProperty(prop);
			continue;
		}

		info[j].prop_id = props->props[i];

		if (info[j].num_enum_values == 0) {
			drmModeFreeProperty(prop);
			continue;
		}

		if (!(prop->flags & DRM_MODE_PROP_ENUM)) {
			weston_log("DRM: expected property %s to be an enum,"
				   " but it is not; ignoring\n", prop->name);
			drmModeFreeProperty(prop);
			info[j].prop_id = 0;
			continue;
		}

		for (k = 0; k < info[j].num_enum_values; k++) {
			int l;

			for (l = 0; l < prop->count_enums; l++) {
				if (!strcmp(prop->enums[l].name,
					    info[j].enum_values[k].name))
					break;
			}

			if (l == prop->count_enums)
				continue;

			info[j].enum_values[k].valid = true;
			info[j].enum_values[k].value = prop->enums[l].value;
		}

		drmModeFreeProperty(prop);
	}

#ifdef DEBUG
	for (i = 0; i < num_infos; i++) {
		if (info[i].prop_id == 0)
			weston_log("DRM warning: property '%s' missing\n",
				   info[i].name);
	}
#endif
}

/**
 * Free DRM property information
 *
 * Frees all memory associated with a DRM property info array and zeroes
 * it out, leaving it usable for a further drm_property_info_update() or
 * drm_property_info_free().
 *
 * @param info DRM property info array
 * @param num_props Number of entries in array to free
 */
static void
drm_property_info_free(struct drm_property_info *info, int num_props)
{
	int i;

	for (i = 0; i < num_props; i++)
		free(info[i].enum_values);

	memset(info, 0, sizeof(*info) * num_props);
}

static void
drm_output_set_cursor(struct drm_output_state *output_state);

static void
drm_output_update_msc(struct drm_output *output, unsigned int seq);

static void
drm_output_destroy(struct weston_output *output_base);

/**
 * Returns true if the plane can be used on the given output for its current
 * repaint cycle.
 */
static bool
drm_plane_is_available(struct drm_plane *plane, struct drm_output *output)
{
	assert(plane->state_cur);

	/* The plane still has a request not yet completed by the kernel. */
	if (!plane->state_cur->complete)
		return false;

	/* The plane is still active on another output. */
	if (plane->state_cur->output && plane->state_cur->output != output)
		return false;

	/* Check whether the plane can be used with this CRTC; possible_crtcs
	 * is a bitmask of CRTC indices (pipe), rather than CRTC object ID. */
	return !!(plane->possible_crtcs & (1 << output->pipe));
}

static struct drm_output *
drm_output_find_by_crtc(struct drm_backend *b, uint32_t crtc_id)
{
	struct drm_output *output;

	wl_list_for_each(output, &b->compositor->output_list, base.link) {
		if (output->crtc_id == crtc_id)
			return output;
	}

	return NULL;
}

static struct drm_head *
drm_head_find_by_connector(struct drm_backend *backend, uint32_t connector_id)
{
	struct weston_head *base;
	struct drm_head *head;

	wl_list_for_each(base,
			 &backend->compositor->head_list, compositor_link) {
		head = to_drm_head(base);
		if (head->connector_id == connector_id)
			return head;
	}

	return NULL;
}

static void
drm_fb_destroy(struct drm_fb *fb)
{
	if (fb->fb_id != 0)
		drmModeRmFB(fb->fd, fb->fb_id);
	weston_buffer_reference(&fb->buffer_ref, NULL);
	free(fb);
}

static void
drm_fb_destroy_dumb(struct drm_fb *fb)
{
	struct drm_mode_destroy_dumb destroy_arg;

	assert(fb->type == BUFFER_PIXMAN_DUMB);

	if (fb->map && fb->size > 0)
		munmap(fb->map, fb->size);

	memset(&destroy_arg, 0, sizeof(destroy_arg));
	destroy_arg.handle = fb->handles[0];
	drmIoctl(fb->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);

	drm_fb_destroy(fb);
}

static void
drm_fb_destroy_gbm(struct gbm_bo *bo, void *data)
{
	struct drm_fb *fb = data;

	assert(fb->type == BUFFER_GBM_SURFACE || fb->type == BUFFER_CLIENT ||
	       fb->type == BUFFER_CURSOR);
	drm_fb_destroy(fb);
}

static int
drm_fb_addfb(struct drm_fb *fb)
{
	int ret = -EINVAL;
#ifdef HAVE_DRM_ADDFB2_MODIFIERS
	uint64_t mods[4] = { };
	int width, height;
	size_t i;
#endif

	/* If we have a modifier set, we must only use the WithModifiers
	 * entrypoint; we cannot import it through legacy ioctls. */
	if (fb->modifier != DRM_FORMAT_MOD_INVALID) {
		/* KMS demands that if a modifier is set, it must be the same
		 * for all planes. */
#ifdef HAVE_DRM_ADDFB2_MODIFIERS
		for (i = 0; i < ARRAY_LENGTH(mods) && fb->handles[i]; i++)
			mods[i] = fb->modifier;
		if (fb->modifier == DRM_FORMAT_MOD_AMPHION_TILED) {
			width = ALIGNTO (fb->width, 8);
			height = ALIGNTO (fb->height, 256);
		} else {
			width = fb->width;
			height = fb->height;
		}
		ret = drmModeAddFB2WithModifiers(fb->fd, width, height,
						 fb->format->format,
						 fb->handles, fb->strides,
						 fb->offsets, mods, &fb->fb_id,
						 DRM_MODE_FB_MODIFIERS);
#endif
		return ret;
	}

	ret = drmModeAddFB2(fb->fd, fb->width, fb->height, fb->format->format,
			    fb->handles, fb->strides, fb->offsets, &fb->fb_id,
			    0);
	if (ret == 0)
		return 0;

	/* Legacy AddFB can't always infer the format from depth/bpp alone, so
	 * check if our format is one of the lucky ones. */
	if (!fb->format->depth || !fb->format->bpp)
		return ret;

	/* Cannot fall back to AddFB for multi-planar formats either. */
	if (fb->handles[1] || fb->handles[2] || fb->handles[3])
		return ret;

	ret = drmModeAddFB(fb->fd, fb->width, fb->height,
			   fb->format->depth, fb->format->bpp,
			   fb->strides[0], fb->handles[0], &fb->fb_id);
	return ret;
}

static struct drm_fb *
drm_fb_create_dumb(struct drm_backend *b, int width, int height,
		   uint32_t format)
{
	struct drm_fb *fb;
	int ret;

	struct drm_mode_create_dumb create_arg;
	struct drm_mode_destroy_dumb destroy_arg;
	struct drm_mode_map_dumb map_arg;

	fb = zalloc(sizeof *fb);
	if (!fb)
		return NULL;
	fb->refcnt = 1;

	fb->format = pixel_format_get_info(format);
	if (!fb->format) {
		weston_log("failed to look up format 0x%lx\n",
			   (unsigned long) format);
		goto err_fb;
	}

	if (!fb->format->depth || !fb->format->bpp) {
		weston_log("format 0x%lx is not compatible with dumb buffers\n",
			   (unsigned long) format);
		goto err_fb;
	}

	memset(&create_arg, 0, sizeof create_arg);
	create_arg.bpp = fb->format->bpp;
	create_arg.width = width;
	create_arg.height = height;

	ret = drmIoctl(b->drm.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_arg);
	if (ret)
		goto err_fb;

	fb->type = BUFFER_PIXMAN_DUMB;
	fb->modifier = DRM_FORMAT_MOD_INVALID;
	fb->handles[0] = create_arg.handle;
	fb->strides[0] = create_arg.pitch;
	fb->size = create_arg.size;
	fb->width = width;
	fb->height = height;
	fb->fd = b->drm.fd;

	if (drm_fb_addfb(fb) != 0) {
		weston_log("failed to create kms fb: %m\n");
		goto err_bo;
	}

	memset(&map_arg, 0, sizeof map_arg);
	map_arg.handle = fb->handles[0];
	ret = drmIoctl(fb->fd, DRM_IOCTL_MODE_MAP_DUMB, &map_arg);
	if (ret)
		goto err_add_fb;

	fb->map = mmap(NULL, fb->size, PROT_WRITE,
		       MAP_SHARED, b->drm.fd, map_arg.offset);
	if (fb->map == MAP_FAILED)
		goto err_add_fb;

	return fb;

err_add_fb:
	drmModeRmFB(b->drm.fd, fb->fb_id);
err_bo:
	memset(&destroy_arg, 0, sizeof(destroy_arg));
	destroy_arg.handle = create_arg.handle;
	drmIoctl(b->drm.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
err_fb:
	free(fb);
	return NULL;
}

static struct drm_fb *
drm_fb_ref(struct drm_fb *fb)
{
	fb->refcnt++;
	return fb;
}

static void
drm_fb_destroy_dmabuf(struct drm_fb *fb)
{
	/* We deliberately do not close the GEM handles here; GBM manages
	 * their lifetime through the BO. */
	if (fb->bo)
		gbm_bo_destroy(fb->bo);
	drm_fb_destroy(fb);
}

static void
drm_close_gem_handle(struct linux_dmabuf_buffer *dmabuf)
{
	struct drm_backend *b = to_drm_backend(dmabuf->compositor);
	int i;

	if (dmabuf->gem_handles[0] != 0) {
		for (i = 0; i < dmabuf->attributes.n_planes; i++) {
			struct drm_gem_close arg = { dmabuf->gem_handles[i], };
			drmIoctl (b->drm.fd, DRM_IOCTL_GEM_CLOSE, &arg);
			dmabuf->gem_handles[i] = 0;
		}
	}
}

static struct drm_fb *
drm_fb_get_from_dmabuf(struct linux_dmabuf_buffer *dmabuf,
		       struct drm_backend *backend, bool is_opaque)
{
#ifdef HAVE_GBM_FD_IMPORT
	struct drm_fb *fb;
	struct gbm_import_fd_data import_legacy = {
		.width = dmabuf->attributes.width,
		.height = dmabuf->attributes.height,
		.format = dmabuf->attributes.format,
		.stride = dmabuf->attributes.stride[0],
		.fd = dmabuf->attributes.fd[0],
	};
	struct gbm_import_fd_modifier_data import_mod = {
		.width = dmabuf->attributes.width,
		.height = dmabuf->attributes.height,
		.format = dmabuf->attributes.format,
		.num_fds = dmabuf->attributes.n_planes,
		.modifier = dmabuf->attributes.modifier[0],
	};
	int i, ret = -1;
	uint32_t gem_handle[MAX_DMABUF_PLANES] = {0};

	/* XXX: TODO:
	 *
	 * Currently the buffer is rejected if any dmabuf attribute
	 * flag is set.  This keeps us from passing an inverted /
	 * interlaced / bottom-first buffer (or any other type that may
	 * be added in the future) through to an overlay.  Ultimately,
	 * these types of buffers should be handled through buffer
	 * transforms and not as spot-checks requiring specific
	 * knowledge. */
	if (dmabuf->attributes.flags)
		return NULL;

	fb = zalloc(sizeof *fb);
	if (fb == NULL)
		return NULL;

	fb->refcnt = 1;
	fb->type = BUFFER_DMABUF;
	fb->width = dmabuf->attributes.width;
	fb->height = dmabuf->attributes.height;
	fb->modifier = dmabuf->attributes.modifier[0];
	fb->dtrc_meta = dmabuf->attributes.dtrc_meta;
	fb->size = 0;
	fb->fd = backend->drm.fd;

	static_assert(ARRAY_LENGTH(fb->strides) ==
		      ARRAY_LENGTH(dmabuf->attributes.stride),
		      "drm_fb and dmabuf stride size must match");
	static_assert(sizeof(fb->strides) == sizeof(dmabuf->attributes.stride),
		      "drm_fb and dmabuf stride size must match");
	memcpy(fb->strides, dmabuf->attributes.stride, sizeof(fb->strides));
	static_assert(ARRAY_LENGTH(fb->offsets) ==
		      ARRAY_LENGTH(dmabuf->attributes.offset),
		      "drm_fb and dmabuf offset size must match");
	static_assert(sizeof(fb->offsets) == sizeof(dmabuf->attributes.offset),
		      "drm_fb and dmabuf offset size must match");
	memcpy(fb->offsets, dmabuf->attributes.offset, sizeof(fb->offsets));

	fb->format = pixel_format_get_info(dmabuf->attributes.format);
	if (!fb->format) {
		weston_log("couldn't look up format info for 0x%lx\n",
			   (unsigned long) dmabuf->attributes.format);
		goto err_free;
	}

	if (is_opaque)
		fb->format = pixel_format_get_opaque_substitute(fb->format);

	if (backend->min_width > fb->width ||
	    fb->width > backend->max_width ||
	    backend->min_height > fb->height ||
	    fb->height > backend->max_height) {
		weston_log("bo geometry out of bounds\n");
		goto err_free;
	}

	if (dmabuf->gem_handles[0] == 0) {
		for (i = 0; i < dmabuf->attributes.n_planes; i++) {
			int ret;
			ret = drmPrimeFDToHandle (fb->fd, dmabuf->attributes.fd[i], &gem_handle[i]);
			if (ret) {
				weston_log ("got gem_handle %x\n", gem_handle[i]);
				goto err_free;
			}
			fb->handles[i] = dmabuf->gem_handles[i] = gem_handle[i];
		}
		linux_dmabuf_buffer_gem_handle_close_cb (dmabuf, drm_close_gem_handle);
	} else {
		for (i = 0; i < dmabuf->attributes.n_planes; i++)
			fb->handles[i] = dmabuf->gem_handles[i];
	}

	if (fb->handles[0] != 0)
		goto add_fb;

	static_assert(ARRAY_LENGTH(import_mod.fds) ==
		      ARRAY_LENGTH(dmabuf->attributes.fd),
		      "GBM and linux_dmabuf FD size must match");
	static_assert(sizeof(import_mod.fds) == sizeof(dmabuf->attributes.fd),
		      "GBM and linux_dmabuf FD size must match");
	memcpy(import_mod.fds, dmabuf->attributes.fd, sizeof(import_mod.fds));

	static_assert(ARRAY_LENGTH(import_mod.strides) ==
		      ARRAY_LENGTH(dmabuf->attributes.stride),
		      "GBM and linux_dmabuf stride size must match");
	static_assert(sizeof(import_mod.strides) ==
		      sizeof(dmabuf->attributes.stride),
		      "GBM and linux_dmabuf stride size must match");
	memcpy(import_mod.strides, dmabuf->attributes.stride,
	       sizeof(import_mod.strides));

	static_assert(ARRAY_LENGTH(import_mod.offsets) ==
		      ARRAY_LENGTH(dmabuf->attributes.offset),
		      "GBM and linux_dmabuf offset size must match");
	static_assert(sizeof(import_mod.offsets) ==
		      sizeof(dmabuf->attributes.offset),
		      "GBM and linux_dmabuf offset size must match");
	memcpy(import_mod.offsets, dmabuf->attributes.offset,
	       sizeof(import_mod.offsets));

	/* The legacy FD-import path does not allow us to supply modifiers,
	 * multiple planes, or buffer offsets. */
	if (dmabuf->attributes.modifier[0] != DRM_FORMAT_MOD_INVALID ||
	    import_mod.num_fds > 1 ||
	    import_mod.offsets[0] > 0) {
		fb->bo = gbm_bo_import(backend->gbm, GBM_BO_IMPORT_FD_MODIFIER,
				       &import_mod,
				       GBM_BO_USE_SCANOUT);
	} else {
		fb->bo = gbm_bo_import(backend->gbm, GBM_BO_IMPORT_FD,
				       &import_legacy,
				       GBM_BO_USE_SCANOUT);
	}

	if (!fb->bo)
		goto err_free;

	for (i = 0; i < dmabuf->attributes.n_planes; i++) {
		fb->handles[i] = gbm_bo_get_handle_for_plane(fb->bo, i).u32;
		if (!fb->handles[i])
			goto err_free;
	}

add_fb:
	ret = drm_fb_addfb(fb);

	if (ret != 0)
		goto err_free;

	return fb;

err_free:
	drm_fb_destroy_dmabuf(fb);
#endif
	return NULL;
}

static struct drm_fb *
drm_fb_get_from_bo(struct gbm_bo *bo, struct drm_backend *backend,
		   bool is_opaque, enum drm_fb_type type)
{
	struct drm_fb *fb = gbm_bo_get_user_data(bo);
#ifdef HAVE_GBM_MODIFIERS
	int i;
#endif

	if (fb) {
		assert(fb->type == type);
		return drm_fb_ref(fb);
	}

	fb = zalloc(sizeof *fb);
	if (fb == NULL)
		return NULL;

	fb->type = type;
	fb->refcnt = 1;
	fb->bo = bo;
	fb->fd = backend->drm.fd;

	fb->width = gbm_bo_get_width(bo);
	fb->height = gbm_bo_get_height(bo);
	fb->format = pixel_format_get_info(gbm_bo_get_format(bo));
	fb->size = 0;

#ifdef HAVE_GBM_MODIFIERS
	fb->modifier = gbm_bo_get_modifier(bo);
	for (i = 0; i < gbm_bo_get_plane_count(bo); i++) {
		fb->strides[i] = gbm_bo_get_stride_for_plane(bo, i);
		fb->handles[i] = gbm_bo_get_handle_for_plane(bo, i).u32;
		fb->offsets[i] = gbm_bo_get_offset(bo, i);
	}
#else
	fb->strides[0] = gbm_bo_get_stride(bo);
	fb->handles[0] = gbm_bo_get_handle(bo).u32;
	fb->modifier = DRM_FORMAT_MOD_INVALID;
#endif

	if (!fb->format) {
		weston_log("couldn't look up format 0x%lx\n",
			   (unsigned long) gbm_bo_get_format(bo));
		goto err_free;
	}

	if (backend->min_width > fb->width ||
	    fb->width > backend->max_width ||
	    backend->min_height > fb->height ||
	    fb->height > backend->max_height) {
		weston_log("bo geometry out of bounds\n");
		goto err_free;
	}

	if (drm_fb_addfb(fb) != 0) {
		if (type == BUFFER_GBM_SURFACE)
			weston_log("failed to create kms fb: %m\n");
		goto err_free;
	}

	gbm_bo_set_user_data(bo, fb, drm_fb_destroy_gbm);

	return fb;

err_free:
	free(fb);
	return NULL;
}

static void
drm_fb_set_buffer(struct drm_fb *fb, struct weston_buffer *buffer)
{
	assert(fb->buffer_ref.buffer == NULL);
	assert(fb->type == BUFFER_CLIENT || fb->type == BUFFER_DMABUF);
	weston_buffer_reference(&fb->buffer_ref, buffer);
}

static void
drm_fb_unref(struct drm_fb *fb)
{
	if (!fb)
		return;

	assert(fb->refcnt > 0);
	if (--fb->refcnt > 0)
		return;

	switch (fb->type) {
	case BUFFER_PIXMAN_DUMB:
		drm_fb_destroy_dumb(fb);
		break;
	case BUFFER_CURSOR:
	case BUFFER_CLIENT:
		gbm_bo_destroy(fb->bo);
		break;
	case BUFFER_GBM_SURFACE:
		gbm_surface_release_buffer(fb->gbm_surface, fb->bo);
		break;
	case BUFFER_DMABUF:
		drm_fb_destroy_dmabuf(fb);
		break;
	default:
		assert(NULL);
		break;
	}
}

/**
 * Allocate a new, empty, plane state.
 */
static struct drm_plane_state *
drm_plane_state_alloc(struct drm_output_state *state_output,
		      struct drm_plane *plane)
{
	struct drm_plane_state *state = zalloc(sizeof(*state));

	assert(state);
	state->output_state = state_output;
	state->plane = plane;

	/* Here we only add the plane state to the desired link, and not
	 * set the member. Having an output pointer set means that the
	 * plane will be displayed on the output; this won't be the case
	 * when we go to disable a plane. In this case, it must be part of
	 * the commit (and thus the output state), but the member must be
	 * NULL, as it will not be on any output when the state takes
	 * effect.
	 */
	if (state_output)
		wl_list_insert(&state_output->plane_list, &state->link);
	else
		wl_list_init(&state->link);

	return state;
}

/**
 * Free an existing plane state. As a special case, the state will not
 * normally be freed if it is the current state; see drm_plane_set_state.
 */
static void
drm_plane_state_free(struct drm_plane_state *state, bool force)
{
	if (!state)
		return;

	wl_list_remove(&state->link);
	wl_list_init(&state->link);
	state->output_state = NULL;

	if (force || state != state->plane->state_cur) {
		drm_fb_unref(state->fb);
		free(state);
	}
}

/**
 * Duplicate an existing plane state into a new plane state, storing it within
 * the given output state. If the output state already contains a plane state
 * for the drm_plane referenced by 'src', that plane state is freed first.
 */
static struct drm_plane_state *
drm_plane_state_duplicate(struct drm_output_state *state_output,
			  struct drm_plane_state *src)
{
	struct drm_plane_state *dst = malloc(sizeof(*dst));
	struct drm_plane_state *old, *tmp;

	assert(src);
	assert(dst);
	*dst = *src;
	wl_list_init(&dst->link);

	wl_list_for_each_safe(old, tmp, &state_output->plane_list, link) {
		/* Duplicating a plane state into the same output state, so
		 * it can replace itself with an identical copy of itself,
		 * makes no sense. */
		assert(old != src);
		if (old->plane == dst->plane)
			drm_plane_state_free(old, false);
	}

	wl_list_insert(&state_output->plane_list, &dst->link);
	if (src->fb)
		dst->fb = drm_fb_ref(src->fb);
	dst->output_state = state_output;
	dst->complete = false;

	return dst;
}

/**
 * Remove a plane state from an output state; if the plane was previously
 * enabled, then replace it with a disabling state. This ensures that the
 * output state was untouched from it was before the plane state was
 * modified by the caller of this function.
 *
 * This is required as drm_output_state_get_plane may either allocate a
 * new plane state, in which case this function will just perform a matching
 * drm_plane_state_free, or it may instead repurpose an existing disabling
 * state (if the plane was previously active), in which case this function
 * will reset it.
 */
static void
drm_plane_state_put_back(struct drm_plane_state *state)
{
	struct drm_output_state *state_output;
	struct drm_plane *plane;

	if (!state)
		return;

	state_output = state->output_state;
	plane = state->plane;
	drm_plane_state_free(state, false);

	/* Plane was previously disabled; no need to keep this temporary
	 * state around. */
	if (!plane->state_cur->fb)
		return;

	(void) drm_plane_state_alloc(state_output, plane);
}

static bool
drm_view_transform_supported(struct weston_view *ev, struct weston_output *output)
{
	struct weston_buffer_viewport *viewport = &ev->surface->buffer_viewport;

	/* This will incorrectly disallow cases where the combination of
	 * buffer and view transformations match the output transform.
	 * Fixing this requires a full analysis of the transformation
	 * chain. */
	if (ev->transform.enabled &&
	    ev->transform.matrix.type >= WESTON_MATRIX_TRANSFORM_ROTATE)
		return false;

	if (viewport->buffer.transform != output->transform)
		return false;

	return true;
}

static void
drm_clip_overlay_coordinate(struct drm_output * output,
				struct drm_plane_state * state)
{
	uint32_t src_w = state->src_w >> 16;
	uint32_t src_h = state->src_h >> 16;
	/* handle out of screen case */
	if (state->dest_x + state->dest_w > output->base.current_mode->width){
		int32_t crop_width = output->base.current_mode->width - state->dest_x;
		if(crop_width > 0) {
			state->src_w = ALIGNTO((crop_width * src_w / state->dest_w), 2) << 16;
			state->dest_w = crop_width;
		}
	}

	if (state->dest_y + state->dest_h > output->base.current_mode->height){
		int32_t crop_height = output->base.current_mode->height - state->dest_y;
		if(crop_height > 0) {
			state->src_h = ALIGNTO((crop_height * src_h / state->dest_h), 2) << 16;
			state->dest_h = crop_height;
		}
	}
}

/**
 * Given a weston_view, fill the drm_plane_state's co-ordinates to display on
 * a given plane.
 */
static bool
drm_plane_state_coords_for_view(struct drm_plane_state *state,
				struct weston_view *ev)
{
	struct drm_output *output = state->output;
	struct weston_buffer_viewport *viewport = &ev->surface->buffer_viewport;
	pixman_region32_t dest_rect;
	pixman_box32_t *box, tbox;
	int32_t scale;
	int src_x, src_y, src_width, src_height;

	if (!drm_view_transform_supported(ev, &output->base))
		return false;

	if (viewport->buffer.scale != output->base.current_scale){
		scale = MAX(viewport->buffer.scale, output->base.current_scale);
	} else {
		scale = output->base.current_scale;
	}

	/* Update the base weston_plane co-ordinates. */
	box = pixman_region32_extents(&ev->transform.boundingbox);
	state->plane->base.x = box->x1;
	state->plane->base.y = box->y1;

	/* First calculate the destination co-ordinates by taking the
	 * area of the view which is visible on this output, performing any
	 * transforms to account for output rotation and scale as necessary. */
	pixman_region32_init(&dest_rect);
	pixman_region32_intersect(&dest_rect, &ev->transform.boundingbox,
				  &output->base.region);
	pixman_region32_translate(&dest_rect, -output->base.x, -output->base.y);
	box = pixman_region32_extents(&dest_rect);
	tbox = weston_transformed_rect(output->base.width,
				       output->base.height,
				       output->base.transform,
				       scale,
				       *box);
	state->dest_x = tbox.x1;
	state->dest_y = tbox.y1;
	state->dest_w = tbox.x2 - tbox.x1;
	state->dest_h = tbox.y2 - tbox.y1;
	pixman_region32_fini(&dest_rect);

	src_x = wl_fixed_to_int (viewport->buffer.src_x);
	src_y = wl_fixed_to_int (viewport->buffer.src_y);
	src_width = wl_fixed_to_int (viewport->buffer.src_width);
	src_height = wl_fixed_to_int (viewport->buffer.src_height);

	if(src_width != -1 && src_width > 0 && src_x >=0 && src_y >= 0
		&& src_x * scale < state->fb->width
		&& src_y * scale < state->fb->height)
	{
		state->src_x = (src_x * scale) << 16;
		state->src_y = (src_y * scale) << 16;
		state->src_w = MIN(state->fb->width - src_x * scale, src_width * scale) << 16;
		state->src_h = MIN(state->fb->height - src_y * scale, src_height * scale) << 16;
	}
	else
	{
		state->src_x = 0;
		state->src_y = 0;
		state->src_w = state->fb->width << 16;
		state->src_h = state->fb->height << 16;
	}

	drm_clip_overlay_coordinate(output, state);

	return true;
}

static bool
drm_view_is_opaque(struct weston_view *ev)
{
	pixman_region32_t r;
	bool ret = false;

	pixman_region32_init_rect(&r, 0, 0,
				  ev->surface->width,
				  ev->surface->height);
	pixman_region32_subtract(&r, &r, &ev->surface->opaque);

	if (!pixman_region32_not_empty(&r))
		ret = true;

	pixman_region32_fini(&r);

	return ret;
}

static struct drm_fb *
drm_fb_get_from_view(struct drm_output_state *state, struct weston_view *ev)
{
	struct drm_output *output = state->output;
	struct drm_backend *b = to_drm_backend(output->base.compositor);
	struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
	bool is_opaque = drm_view_is_opaque(ev);
	struct linux_dmabuf_buffer *dmabuf;
	struct drm_fb *fb;

	if (ev->alpha != 1.0f)
		return NULL;

	if (!drm_view_transform_supported(ev, &output->base))
		return NULL;

	if (!buffer)
		return NULL;

	if (wl_shm_buffer_get(buffer->resource))
		return NULL;

	/* GBM is used for dmabuf import as well as from client wl_buffer. */
	if (!b->gbm)
		return NULL;

	dmabuf = linux_dmabuf_buffer_get(buffer->resource);
	if (dmabuf) {
		fb = drm_fb_get_from_dmabuf(dmabuf, b, is_opaque);
		if (!fb)
			return NULL;
	} else {
		struct gbm_bo *bo;

		bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
				   buffer->resource, GBM_BO_USE_SCANOUT);
		if (!bo)
			return NULL;

		fb = drm_fb_get_from_bo(bo, b, is_opaque, BUFFER_CLIENT);
		if (!fb) {
			gbm_bo_destroy(bo);
			return NULL;
		}
	}

	drm_fb_set_buffer(fb, buffer);
	return fb;
}

/**
 * Return a plane state from a drm_output_state.
 */
static struct drm_plane_state *
drm_output_state_get_existing_plane(struct drm_output_state *state_output,
				    struct drm_plane *plane)
{
	struct drm_plane_state *ps;

	wl_list_for_each(ps, &state_output->plane_list, link) {
		if (ps->plane == plane)
			return ps;
	}

	return NULL;
}

/**
 * Return a plane state from a drm_output_state, either existing or
 * freshly allocated.
 */
static struct drm_plane_state *
drm_output_state_get_plane(struct drm_output_state *state_output,
			   struct drm_plane *plane)
{
	struct drm_plane_state *ps;

	ps = drm_output_state_get_existing_plane(state_output, plane);
	if (ps)
		return ps;

	return drm_plane_state_alloc(state_output, plane);
}

/**
 * Allocate a new, empty drm_output_state. This should not generally be used
 * in the repaint cycle; see drm_output_state_duplicate.
 */
static struct drm_output_state *
drm_output_state_alloc(struct drm_output *output,
		       struct drm_pending_state *pending_state)
{
	struct drm_output_state *state = zalloc(sizeof(*state));

	assert(state);
	state->output = output;
	state->dpms = WESTON_DPMS_OFF;
	state->pending_state = pending_state;
	if (pending_state)
		wl_list_insert(&pending_state->output_list, &state->link);
	else
		wl_list_init(&state->link);

	wl_list_init(&state->plane_list);

	return state;
}

/**
 * Duplicate an existing drm_output_state into a new one. This is generally
 * used during the repaint cycle, to capture the existing state of an output
 * and modify it to create a new state to be used.
 *
 * The mode determines whether the output will be reset to an a blank state,
 * or an exact mirror of the current state.
 */
static struct drm_output_state *
drm_output_state_duplicate(struct drm_output_state *src,
			   struct drm_pending_state *pending_state,
			   enum drm_output_state_duplicate_mode plane_mode)
{
	struct drm_output_state *dst = malloc(sizeof(*dst));
	struct drm_plane_state *ps;

	assert(dst);

	/* Copy the whole structure, then individually modify the
	 * pending_state, as well as the list link into our pending
	 * state. */
	*dst = *src;

	dst->pending_state = pending_state;
	if (pending_state)
		wl_list_insert(&pending_state->output_list, &dst->link);
	else
		wl_list_init(&dst->link);

	wl_list_init(&dst->plane_list);

	wl_list_for_each(ps, &src->plane_list, link) {
		/* Don't carry planes which are now disabled; these should be
		 * free for other outputs to reuse. */
		if (!ps->output)
			continue;

		if (plane_mode == DRM_OUTPUT_STATE_CLEAR_PLANES)
			(void) drm_plane_state_alloc(dst, ps->plane);
		else
			(void) drm_plane_state_duplicate(dst, ps);
	}

	return dst;
}

/**
 * Free an unused drm_output_state.
 */
static void
drm_output_state_free(struct drm_output_state *state)
{
	struct drm_plane_state *ps, *next;

	if (!state)
		return;

	wl_list_for_each_safe(ps, next, &state->plane_list, link)
		drm_plane_state_free(ps, false);

	wl_list_remove(&state->link);

	free(state);
}

/**
 * Get output state to disable output
 *
 * Returns a pointer to an output_state object which can be used to disable
 * an output (e.g. DPMS off).
 *
 * @param pending_state The pending state object owning this update
 * @param output The output to disable
 * @returns A drm_output_state to disable the output
 */
static struct drm_output_state *
drm_output_get_disable_state(struct drm_pending_state *pending_state,
			     struct drm_output *output)
{
	struct drm_output_state *output_state;

	output_state = drm_output_state_duplicate(output->state_cur,
						  pending_state,
						  DRM_OUTPUT_STATE_CLEAR_PLANES);
	output_state->dpms = WESTON_DPMS_OFF;

	return output_state;
}

/**
 * Allocate a new drm_pending_state
 *
 * Allocate a new, empty, 'pending state' structure to be used across a
 * repaint cycle or similar.
 *
 * @param backend DRM backend
 * @returns Newly-allocated pending state structure
 */
static struct drm_pending_state *
drm_pending_state_alloc(struct drm_backend *backend)
{
	struct drm_pending_state *ret;

	ret = calloc(1, sizeof(*ret));
	if (!ret)
		return NULL;

	ret->backend = backend;
	wl_list_init(&ret->output_list);

	return ret;
}

/**
 * Free a drm_pending_state structure
 *
 * Frees a pending_state structure, as well as any output_states connected
 * to this pending state.
 *
 * @param pending_state Pending state structure to free
 */
static void
drm_pending_state_free(struct drm_pending_state *pending_state)
{
	struct drm_output_state *output_state, *tmp;

	if (!pending_state)
		return;

	wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
			      link) {
		drm_output_state_free(output_state);
	}

	free(pending_state);
}

/**
 * Find an output state in a pending state
 *
 * Given a pending_state structure, find the output_state for a particular
 * output.
 *
 * @param pending_state Pending state structure to search
 * @param output Output to find state for
 * @returns Output state if present, or NULL if not
 */
static struct drm_output_state *
drm_pending_state_get_output(struct drm_pending_state *pending_state,
			     struct drm_output *output)
{
	struct drm_output_state *output_state;

	wl_list_for_each(output_state, &pending_state->output_list, link) {
		if (output_state->output == output)
			return output_state;
	}

	return NULL;
}

static int drm_pending_state_apply_sync(struct drm_pending_state *state);
static int drm_pending_state_test(struct drm_pending_state *state);

/**
 * Mark a drm_output_state (the output's last state) as complete. This handles
 * any post-completion actions such as updating the repaint timer, disabling the
 * output, and finally freeing the state.
 */
static void
drm_output_update_complete(struct drm_output *output, uint32_t flags,
			   unsigned int sec, unsigned int usec)
{
	struct drm_backend *b = to_drm_backend(output->base.compositor);
	struct drm_plane_state *ps;
	struct timespec ts;

	/* Stop the pageflip timer instead of rearming it here */
	if (output->pageflip_timer)
		wl_event_source_timer_update(output->pageflip_timer, 0);

	wl_list_for_each(ps, &output->state_cur->plane_list, link)
		ps->complete = true;

	drm_output_state_free(output->state_last);
	output->state_last = NULL;

	if (output->destroy_pending) {
		output->destroy_pending = 0;
		output->disable_pending = 0;
		output->dpms_off_pending = 0;
		drm_output_destroy(&output->base);
		return;
	} else if (output->disable_pending) {
		output->disable_pending = 0;
		output->dpms_off_pending = 0;
		weston_output_disable(&output->base);
		return;
	} else if (output->dpms_off_pending) {
		struct drm_pending_state *pending = drm_pending_state_alloc(b);
		output->dpms_off_pending = 0;
		drm_output_get_disable_state(pending, output);
		drm_pending_state_apply_sync(pending);
		return;
	} else if (output->state_cur->dpms == WESTON_DPMS_OFF &&
	           output->base.repaint_status != REPAINT_AWAITING_COMPLETION) {
		/* DPMS can happen to us either in the middle of a repaint
		 * cycle (when we have painted fresh content, only to throw it
		 * away for DPMS off), or at any other random point. If the
		 * latter is true, then we cannot go through finish_frame,
		 * because the repaint machinery does not expect this. */
		return;
	}

	ts.tv_sec = sec;
	ts.tv_nsec = usec * 1000;
	weston_output_finish_frame(&output->base, &ts, flags);

	/* We can't call this from frame_notify, because the output's
	 * repaint needed flag is cleared just after that */
	if (output->recorder)
		weston_output_schedule_repaint(&output->base);
}

/**
 * Mark an output state as current on the output, i.e. it has been
 * submitted to the kernel. The mode argument determines whether this
 * update will be applied synchronously (e.g. when calling drmModeSetCrtc),
 * or asynchronously (in which case we wait for events to complete).
 */
static void
drm_output_assign_state(struct drm_output_state *state,
			enum drm_state_apply_mode mode)
{
	struct drm_output *output = state->output;
	struct drm_backend *b = to_drm_backend(output->base.compositor);
	struct drm_plane_state *plane_state;

	assert(!output->state_last);

	if (mode == DRM_STATE_APPLY_ASYNC)
		output->state_last = output->state_cur;
	else
		drm_output_state_free(output->state_cur);

	wl_list_remove(&state->link);
	wl_list_init(&state->link);
	state->pending_state = NULL;

	output->state_cur = state;

	if (b->atomic_modeset && mode == DRM_STATE_APPLY_ASYNC)
		output->atomic_complete_pending = 1;

	/* Replace state_cur on each affected plane with the new state, being
	 * careful to dispose of orphaned (but only orphaned) previous state.
	 * If the previous state is not orphaned (still has an output_state
	 * attached), it will be disposed of by freeing the output_state. */
	wl_list_for_each(plane_state, &state->plane_list, link) {
		struct drm_plane *plane = plane_state->plane;

		if (plane->state_cur && !plane->state_cur->output_state)
			drm_plane_state_free(plane->state_cur, true);
		plane->state_cur = plane_state;

		if (mode != DRM_STATE_APPLY_ASYNC) {
			plane_state->complete = true;
			continue;
		}

		if (b->atomic_modeset)
			continue;

		if (plane->type == WDRM_PLANE_TYPE_OVERLAY)
			output->vblank_pending++;
		else if (plane->type == WDRM_PLANE_TYPE_PRIMARY)
			output->page_flip_pending = 1;
	}
}

enum drm_output_propose_state_mode {
	DRM_OUTPUT_PROPOSE_STATE_MIXED, /**< mix renderer & planes */
	DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY, /**< only assign to renderer & cursor */
	DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY, /**< no renderer use, only planes */
};

static struct drm_plane_state *
drm_output_prepare_scanout_view(struct drm_output_state *output_state,
				struct weston_view *ev,
				enum drm_output_propose_state_mode mode)
{
	struct drm_output *output = output_state->output;
	struct drm_backend *b = to_drm_backend(output->base.compositor);
	struct drm_plane *scanout_plane = output->scanout_plane;
	struct drm_plane_state *state;
	struct drm_fb *fb;
	pixman_box32_t *extents;

	assert(!b->sprites_are_broken);
	assert(mode == DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY);

	/* Check the view spans exactly the output size, calculated in the
	 * logical co-ordinate space. */
	extents = pixman_region32_extents(&ev->transform.boundingbox);
	if (extents->x1 != output->base.x ||
	    extents->y1 != output->base.y ||
	    extents->x2 != output->base.x + output->base.width ||
	    extents->y2 != output->base.y + output->base.height)
		return NULL;

	if (ev->alpha != 1.0f)
		return NULL;

	fb = drm_fb_get_from_view(output_state, ev);
	if (!fb)
		return NULL;

	/* Can't change formats with just a pageflip */
	if (!b->atomic_modeset && fb->format->format != output->gbm_format) {
		drm_fb_unref(fb);
		return NULL;
	}

	state = drm_output_state_get_plane(output_state, scanout_plane);

	/* The only way we can already have a buffer in the scanout plane is
	 * if we are in mixed mode, or if a client buffer has already been
	 * placed into scanout. The former case will never call into here,
	 * and in the latter case, the view must have been marked as occluded,
	 * meaning we should never have ended up here. */
	assert(!state->fb);
	state->fb = fb;
	state->ev = ev;
	state->output = output;
	if (!drm_plane_state_coords_for_view(state, ev))
		goto err;

	if (state->dest_x != 0 || state->dest_y != 0 ||
	    state->dest_w != (unsigned) output->base.current_mode->width ||
	    state->dest_h != (unsigned) output->base.current_mode->height)
		goto err;

	/* The legacy API does not let us perform cropping or scaling. */
	if (!b->atomic_modeset &&
	    (state->src_x != 0 || state->src_y != 0 ||
	     state->src_w != state->dest_w << 16 ||
	     state->src_h != state->dest_h << 16))
		goto err;

	/* In plane-only mode, we don't need to test the state now, as we
	 * will only test it once at the end. */
	return state;

err:
	drm_plane_state_put_back(state);
	return NULL;
}

static struct drm_fb *
drm_output_render_gl(struct drm_output_state *state, pixman_region32_t *damage)
{
	struct drm_output *output = state->output;
	struct drm_backend *b = to_drm_backend(output->base.compositor);
	struct gbm_bo *bo;
	struct drm_fb *ret;

	output->base.compositor->renderer->repaint_output(&output->base,
							  damage);

	bo = gbm_surface_lock_front_buffer(output->gbm_surface);
	if (!bo) {
		weston_log("failed to lock front buffer: %m\n");
		return NULL;
	}

	/* The renderer always produces an opaque image. */
	ret = drm_fb_get_from_bo(bo, b, true, BUFFER_GBM_SURFACE);
	if (!ret) {
		weston_log("failed to get drm_fb for bo\n");
		gbm_surface_release_buffer(output->gbm_surface, bo);
		return NULL;
	}
	ret->gbm_surface = output->gbm_surface;

	return ret;
}

static struct drm_fb *
drm_output_render_pixman(struct drm_output_state *state,
			 pixman_region32_t *damage)
{
	struct drm_output *output = state->output;
	struct weston_compositor *ec = output->base.compositor;

	output->current_image ^= 1;

	pixman_renderer_output_set_buffer(&output->base,
					  output->image[output->current_image]);
	pixman_renderer_output_set_hw_extra_damage(&output->base,
						   &output->previous_damage);

	ec->renderer->repaint_output(&output->base, damage);

	pixman_region32_copy(&output->previous_damage, damage);

	return drm_fb_ref(output->dumb[output->current_image]);
}

#if defined(ENABLE_IMXGPU) && defined(ENABLE_IMXG2D)
static struct drm_fb *
drm_output_render_g2d(struct drm_output_state *state, pixman_region32_t *damage)
{
	struct drm_output *output = state->output;
	struct weston_compositor *ec = output->base.compositor;
	pixman_region32_t total_damage, previous_damage;

	pixman_region32_init(&total_damage);
	pixman_region32_init(&previous_damage);

	pixman_region32_copy(&previous_damage, damage);

	pixman_region32_union(&total_damage, damage, &output->previous_damage);
	pixman_region32_copy(&output->previous_damage, &previous_damage);

	output->current_image ^= 1;

	g2d_renderer->output_set_buffer(&output->base,
					  &output->g2d_image[output->current_image]);

	ec->renderer->repaint_output(&output->base, &total_damage);

	pixman_region32_fini(&total_damage);
	pixman_region32_fini(&previous_damage);

	return drm_fb_ref(output->dumb[output->current_image]);
}
#endif

#ifdef HAVE_GBM_MODIFIERS
static int
drm_get_gbm_alignment(struct drm_fb *fb)
{
	int gbm_aligned = 1;

	if (fb){
		switch(fb->modifier) {
#if defined(ENABLE_IMXGPU)
			case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED_FC:
			case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
				gbm_aligned = 64;
				break;
#endif
			default:
				break;
		}
	}
	return gbm_aligned;
}
#endif

static void
drm_output_render(struct drm_output_state *state, pixman_region32_t *damage)
{
	struct drm_output *output = state->output;
	struct weston_compositor *c = output->base.compositor;
	struct drm_plane_state *scanout_state;
	struct drm_plane *scanout_plane = output->scanout_plane;
	struct drm_backend *b = to_drm_backend(c);
	struct drm_fb *fb;
	struct weston_config_section *section;

	/* If we already have a client buffer promoted to scanout, then we don't
	 * want to render. */
	scanout_state = drm_output_state_get_plane(state,
						   output->scanout_plane);
	if (scanout_state->fb)
		return;
	
#ifdef HAVE_GBM_MODIFIERS
	int gbm_aligned = drm_get_gbm_alignment (scanout_plane->state_cur->fb);
#endif

	if (!pixman_region32_not_empty(damage) &&
	    scanout_plane->state_cur->fb &&
	    (scanout_plane->state_cur->fb->type == BUFFER_GBM_SURFACE ||
	     scanout_plane->state_cur->fb->type == BUFFER_PIXMAN_DUMB) &&
#ifdef HAVE_GBM_MODIFIERS
	    scanout_plane->state_cur->fb->width ==
		ALIGNTO(output->base.current_mode->width, gbm_aligned) &&
	    scanout_plane->state_cur->fb->height ==
		ALIGNTO(output->base.current_mode->height, gbm_aligned)) {
#else
	    scanout_plane->state_cur->fb->width ==
		output->base.current_mode->width &&
	    scanout_plane->state_cur->fb->height ==
		output->base.current_mode->height) {
#endif
		fb = drm_fb_ref(scanout_plane->state_cur->fb);
	} else if (b->use_pixman) {
		fb = drm_output_render_pixman(state, damage);
	}
#if defined(ENABLE_IMXGPU)
#if defined(ENABLE_IMXG2D)
	else if (b->use_g2d)
		fb = drm_output_render_g2d(state, damage);
#endif
#if defined(ENABLE_OPENGL)
	else
		fb = drm_output_render_gl(state, damage);
#endif
#endif

	if (!fb) {
		drm_plane_state_put_back(scanout_state);
		return;
	}

	scanout_state->fb = fb;
	scanout_state->output = output;

	scanout_state->src_x = 0;
	scanout_state->src_y = 0;
	scanout_state->src_w = output->base.current_mode->width << 16;
	scanout_state->src_h = output->base.current_mode->height << 16;

	scanout_state->dest_x = 0;
	scanout_state->dest_y = 0;
	scanout_state->dest_w = scanout_state->src_w >> 16;
	scanout_state->dest_h = scanout_state->src_h >> 16;

	section = weston_config_get_section(wet_get_config(c),
					    "shell", NULL, NULL);
	if (section) {
		char *size;
		int n;
		uint32_t width, height;

		weston_config_section_get_string(section, "size", &size, NULL);

		if(size){
			n = sscanf(size, "%dx%d", &width, &height);
			if (n == 2) {
				if (scanout_state->src_w > (width << 16))
					scanout_state->src_w = width << 16;
				if (scanout_state->src_h > (height << 16))
					scanout_state->src_h = height << 16;
			}
		}
	}

	pixman_region32_subtract(&c->primary_plane.damage,
				 &c->primary_plane.damage, damage);
}

static void
drm_output_set_gamma(struct weston_output *output_base,
		     uint16_t size, uint16_t *r, uint16_t *g, uint16_t *b)
{
	int rc;
	struct drm_output *output = to_drm_output(output_base);
	struct drm_backend *backend =
		to_drm_backend(output->base.compositor);

	/* check */
	if (output_base->gamma_size != size)
		return;

	rc = drmModeCrtcSetGamma(backend->drm.fd,
				 output->crtc_id,
				 size, r, g, b);
	if (rc)
		weston_log("set gamma failed: %m\n");
}

/* Determine the type of vblank synchronization to use for the output.
 *
 * The pipe parameter indicates which CRTC is in use.  Knowing this, we
 * can determine which vblank sequence type to use for it.  Traditional
 * cards had only two CRTCs, with CRTC 0 using no special flags, and
 * CRTC 1 using DRM_VBLANK_SECONDARY.  The first bit of the pipe
 * parameter indicates this.
 *
 * Bits 1-5 of the pipe parameter are 5 bit wide pipe number between
 * 0-31.  If this is non-zero it indicates we're dealing with a
 * multi-gpu situation and we need to calculate the vblank sync
 * using DRM_BLANK_HIGH_CRTC_MASK.
 */
static unsigned int
drm_waitvblank_pipe(struct drm_output *output)
{
	if (output->pipe > 1)
		return (output->pipe << DRM_VBLANK_HIGH_CRTC_SHIFT) &
				DRM_VBLANK_HIGH_CRTC_MASK;
	else if (output->pipe > 0)
		return DRM_VBLANK_SECONDARY;
	else
		return 0;
}

static int
drm_output_apply_state_legacy(struct drm_output_state *state)
{
	struct drm_output *output = state->output;
	struct drm_backend *backend = to_drm_backend(output->base.compositor);
	struct drm_plane *scanout_plane = output->scanout_plane;
	struct drm_property_info *dpms_prop;
	struct drm_plane_state *scanout_state;
	struct drm_plane_state *ps;
	struct drm_mode *mode;
	struct drm_head *head;
	uint32_t connectors[MAX_CLONED_CONNECTORS];
	int n_conn = 0;
	struct timespec now;
	int ret = 0;

	wl_list_for_each(head, &output->base.head_list, base.output_link) {
		assert(n_conn < MAX_CLONED_CONNECTORS);
		connectors[n_conn++] = head->connector_id;
	}

	/* If disable_planes is set then assign_planes() wasn't
	 * called for this render, so we could still have a stale
	 * cursor plane set up.
	 */
	if (output->base.disable_planes) {
		output->cursor_view = NULL;
		if (output->cursor_plane) {
			output->cursor_plane->base.x = INT32_MIN;
			output->cursor_plane->base.y = INT32_MIN;
		}
	}

	if (state->dpms != WESTON_DPMS_ON) {
		wl_list_for_each(ps, &state->plane_list, link) {
			struct drm_plane *p = ps->plane;
			assert(ps->fb == NULL);
			assert(ps->output == NULL);

			if (p->type != WDRM_PLANE_TYPE_OVERLAY)
				continue;

			ret = drmModeSetPlane(backend->drm.fd, p->plane_id,
					      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
			if (ret)
				weston_log("drmModeSetPlane failed disable: %m\n");
		}

		if (output->cursor_plane) {
			ret = drmModeSetCursor(backend->drm.fd, output->crtc_id,
					       0, 0, 0);
			if (ret)
				weston_log("drmModeSetCursor failed disable: %m\n");
		}

		ret = drmModeSetCrtc(backend->drm.fd, output->crtc_id, 0, 0, 0,
				     NULL, 0, NULL);
		if (ret)
			weston_log("drmModeSetCrtc failed disabling: %m\n");

		drm_output_assign_state(state, DRM_STATE_APPLY_SYNC);
		weston_compositor_read_presentation_clock(output->base.compositor, &now);
		drm_output_update_complete(output,
		                           WP_PRESENTATION_FEEDBACK_KIND_HW_COMPLETION,
					   now.tv_sec, now.tv_nsec / 1000);

		return 0;
	}

	scanout_state =
		drm_output_state_get_existing_plane(state, scanout_plane);

	/* The legacy SetCrtc API doesn't allow us to do scaling, and the
	 * legacy PageFlip API doesn't allow us to do clipping either. */
	assert(scanout_state->src_x == 0);
	assert(scanout_state->src_y == 0);
	assert(scanout_state->dest_x == 0);
	assert(scanout_state->dest_y == 0);

	mode = to_drm_mode(output->base.current_mode);
	if (backend->state_invalid ||
	    !scanout_plane->state_cur->fb ||
	    scanout_plane->state_cur->fb->strides[0] !=
	    scanout_state->fb->strides[0]) {
		ret = drmModeSetCrtc(backend->drm.fd, output->crtc_id,
				     scanout_state->fb->fb_id,
				     0, 0,
				     connectors, n_conn,
				     &mode->mode_info);
		if (ret) {
			weston_log("set mode failed: %m\n");
			goto err;
		}
	}

	if (drmModePageFlip(backend->drm.fd, output->crtc_id,
			    scanout_state->fb->fb_id,
			    DRM_MODE_PAGE_FLIP_EVENT, output) < 0) {
		weston_log("queueing pageflip failed: %m\n");
		goto err;
	}

	assert(!output->page_flip_pending);

	if (output->pageflip_timer)
		wl_event_source_timer_update(output->pageflip_timer,
		                             backend->pageflip_timeout);

	drm_output_set_cursor(state);

	/*
	 * Now, update all the sprite surfaces
	 */
	wl_list_for_each(ps, &state->plane_list, link) {
		uint32_t flags = 0, fb_id = 0;
		drmVBlank vbl = {
			.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT,
			.request.sequence = 1,
		};
		struct drm_plane *p = ps->plane;

		if (p->type != WDRM_PLANE_TYPE_OVERLAY)
			continue;

		assert(p->state_cur->complete);
		assert(!!p->state_cur->output == !!p->state_cur->fb);
		assert(!p->state_cur->output || p->state_cur->output == output);
		assert(!ps->complete);
		assert(!ps->output || ps->output == output);
		assert(!!ps->output == !!ps->fb);

		if (ps->fb && !backend->sprites_hidden)
			fb_id = ps->fb->fb_id;

		ret = drmModeSetPlane(backend->drm.fd, p->plane_id,
				      output->crtc_id, fb_id, flags,
				      ps->dest_x, ps->dest_y,
				      ps->dest_w, ps->dest_h,
				      ps->src_x, ps->src_y,
				      ps->src_w, ps->src_h);
		if (ret)
			weston_log("setplane failed: %d: %s\n",
				ret, strerror(errno));

		vbl.request.type |= drm_waitvblank_pipe(output);

		/*
		 * Queue a vblank signal so we know when the surface
		 * becomes active on the display or has been replaced.
		 */
		vbl.request.signal = (unsigned long) ps;
		ret = drmWaitVBlank(backend->drm.fd, &vbl);
		if (ret) {
			weston_log("vblank event request failed: %d: %s\n",
				ret, strerror(errno));
		}
	}

	if (state->dpms != output->state_cur->dpms) {
		wl_list_for_each(head, &output->base.head_list, base.output_link) {
			dpms_prop = &head->props_conn[WDRM_CONNECTOR_DPMS];
			if (dpms_prop->prop_id == 0)
				continue;

			ret = drmModeConnectorSetProperty(backend->drm.fd,
							  head->connector_id,
							  dpms_prop->prop_id,
							  state->dpms);
			if (ret) {
				weston_log("DRM: DPMS: failed property set for %s\n",
					   head->base.name);
			}
		}
	}

	drm_output_assign_state(state, DRM_STATE_APPLY_ASYNC);

	return 0;

err:
	output->cursor_view = NULL;
	drm_output_state_free(state);
	return -1;
}

#ifdef HAVE_DRM_ATOMIC
static int
crtc_add_prop(drmModeAtomicReq *req, struct drm_output *output,
	      enum wdrm_crtc_property prop, uint64_t val)
{
	struct drm_property_info *info = &output->props_crtc[prop];
	int ret;

	if (info->prop_id == 0)
		return -1;

	ret = drmModeAtomicAddProperty(req, output->crtc_id, info->prop_id,
				       val);
	return (ret <= 0) ? -1 : 0;
}

static int
connector_add_prop(drmModeAtomicReq *req, struct drm_head *head,
		   enum wdrm_connector_property prop, uint64_t val)
{
	struct drm_property_info *info = &head->props_conn[prop];
	int ret;

	if (info->prop_id == 0)
		return -1;

	ret = drmModeAtomicAddProperty(req, head->connector_id,
				       info->prop_id, val);
	return (ret <= 0) ? -1 : 0;
}

static int
plane_add_prop(drmModeAtomicReq *req, struct drm_plane *plane,
	       enum wdrm_plane_property prop, uint64_t val)
{
	struct drm_property_info *info = &plane->props[prop];
	int ret;

	if (info->prop_id == 0)
		return -1;

	ret = drmModeAtomicAddProperty(req, plane->plane_id, info->prop_id,
				       val);
	return (ret <= 0) ? -1 : 0;
}

static int
drm_mode_ensure_blob(struct drm_backend *backend, struct drm_mode *mode)
{
	int ret;

	if (mode->blob_id)
		return 0;

	ret = drmModeCreatePropertyBlob(backend->drm.fd,
					&mode->mode_info,
					sizeof(mode->mode_info),
					&mode->blob_id);
	if (ret != 0)
		weston_log("failed to create mode property blob: %m\n");

	return ret;
}

static int
drm_output_apply_state_atomic(struct drm_output_state *state,
			      drmModeAtomicReq *req,
			      uint32_t *flags)
{
	struct drm_output *output = state->output;
	struct drm_backend *backend = to_drm_backend(output->base.compositor);
	struct drm_plane_state *plane_state;
	struct drm_mode *current_mode = to_drm_mode(output->base.current_mode);
	struct drm_head *head;
	int ret = 0;
	int in_fence_fd = -1;

	if(output->gbm_surface)
		in_fence_fd = gbm_surface_get_in_fence_fd(output->gbm_surface);
	if (state->dpms != output->state_cur->dpms)
		*flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;

	if (state->dpms == WESTON_DPMS_ON) {
		ret = drm_mode_ensure_blob(backend, current_mode);
		if (ret != 0)
			return ret;

		ret |= crtc_add_prop(req, output, WDRM_CRTC_MODE_ID,
				     current_mode->blob_id);
		ret |= crtc_add_prop(req, output, WDRM_CRTC_ACTIVE, 1);

		/* No need for the DPMS property, since it is implicit in
		 * routing and CRTC activity. */
		wl_list_for_each(head, &output->base.head_list, base.output_link) {
			ret |= connector_add_prop(req, head, WDRM_CONNECTOR_CRTC_ID,
						  output->crtc_id);
		}

		if (backend->hdr_blob_id > 0) {
			wl_list_for_each(head, &output->base.head_list, base.output_link) {
				/* checking if the output driver this head */
				if (head->base.output == &output->base)
					connector_add_prop(req, head, WDRM_CONNECTOR_HDR10_METADATA,
							backend->hdr_blob_id);
			}
		}
	} else {
		ret |= crtc_add_prop(req, output, WDRM_CRTC_MODE_ID, 0);
		ret |= crtc_add_prop(req, output, WDRM_CRTC_ACTIVE, 0);

		/* No need for the DPMS property, since it is implicit in
		 * routing and CRTC activity. */
		wl_list_for_each(head, &output->base.head_list, base.output_link)
			ret |= connector_add_prop(req, head, WDRM_CONNECTOR_CRTC_ID, 0);
	}

	if (ret != 0) {
		weston_log("couldn't set atomic CRTC/connector state\n");
		return ret;
	}

	wl_list_for_each(plane_state, &state->plane_list, link) {
		struct drm_plane *plane = plane_state->plane;

		ret |= plane_add_prop(req, plane, WDRM_PLANE_FB_ID,
				      plane_state->fb ? plane_state->fb->fb_id : 0);
		ret |= plane_add_prop(req, plane, WDRM_PLANE_CRTC_ID,
				      plane_state->fb ? output->crtc_id : 0);
		ret |= plane_add_prop(req, plane, WDRM_PLANE_SRC_X,
				      plane_state->src_x);
		ret |= plane_add_prop(req, plane, WDRM_PLANE_SRC_Y,
				      plane_state->src_y);
		ret |= plane_add_prop(req, plane, WDRM_PLANE_SRC_W,
				      plane_state->src_w);
		ret |= plane_add_prop(req, plane, WDRM_PLANE_SRC_H,
				      plane_state->src_h);
		ret |= plane_add_prop(req, plane, WDRM_PLANE_CRTC_X,
				      plane_state->dest_x);
		ret |= plane_add_prop(req, plane, WDRM_PLANE_CRTC_Y,
				      plane_state->dest_y);
		ret |= plane_add_prop(req, plane, WDRM_PLANE_CRTC_W,
				      plane_state->dest_w);
		ret |= plane_add_prop(req, plane, WDRM_PLANE_CRTC_H,
				      plane_state->dest_h);
		if (in_fence_fd > 0 && plane->type == WDRM_PLANE_TYPE_PRIMARY)
			ret |= plane_add_prop(req, plane, WDRM_PLANE_IN_FENCE_FD, in_fence_fd);

		if (plane_state->fb && plane_state->fb->dtrc_meta != plane->dtrc_meta
		    && plane->type == WDRM_PLANE_TYPE_OVERLAY
			&& plane_state->fb->modifier != DRM_FORMAT_MOD_LINEAR)
		{
		        plane_add_prop(req, plane, WDRM_PLANE_DTRC_META, plane_state->fb->dtrc_meta);
		        plane->dtrc_meta = plane_state->fb->dtrc_meta;
		}

		if (ret != 0) {
			weston_log("couldn't set plane state\n");
			return ret;
		}
	}

	return 0;
}

/**
 * Helper function used only by drm_pending_state_apply, with the same
 * guarantees and constraints as that function.
 */
static int
drm_pending_state_apply_atomic(struct drm_pending_state *pending_state,
			       enum drm_state_apply_mode mode)
{
	struct drm_backend *b = pending_state->backend;
	struct drm_output_state *output_state, *tmp;
	struct drm_plane *plane;
	drmModeAtomicReq *req = drmModeAtomicAlloc();
	uint32_t flags = 0;
	int ret = 0;
	drm_magic_t magic;

	if (!req)
		return -1;

	if (b->state_invalid) {
		struct weston_head *head_base;
		struct drm_head *head;
		uint32_t *unused;
		int err;

		/* If we need to reset all our state (e.g. because we've
		 * just started, or just been VT-switched in), explicitly
		 * disable all the CRTCs and connectors we aren't using. */
		wl_list_for_each(head_base,
				 &b->compositor->head_list, compositor_link) {
			struct drm_property_info *info;

			if (weston_head_is_enabled(head_base))
				continue;

			head = to_drm_head(head_base);

			info = &head->props_conn[WDRM_CONNECTOR_CRTC_ID];
			err = drmModeAtomicAddProperty(req, head->connector_id,
						       info->prop_id, 0);
			if (err <= 0)
				ret = -1;
		}

		wl_array_for_each(unused, &b->unused_crtcs) {
			struct drm_property_info infos[WDRM_CRTC__COUNT];
			struct drm_property_info *info;
			drmModeObjectProperties *props;
			uint64_t active;

			memset(infos, 0, sizeof(infos));

			/* We can't emit a disable on a CRTC that's already
			 * off, as the kernel will refuse to generate an event
			 * for an off->off state and fail the commit.
			 */
			props = drmModeObjectGetProperties(b->drm.fd,
							   *unused,
							   DRM_MODE_OBJECT_CRTC);
			if (!props) {
				ret = -1;
				continue;
			}

			drm_property_info_populate(b, crtc_props, infos,
						   WDRM_CRTC__COUNT,
						   props);

			info = &infos[WDRM_CRTC_ACTIVE];
			active = drm_property_get_value(info, props, 0);
			drmModeFreeObjectProperties(props);
			if (active == 0) {
				drm_property_info_free(infos, WDRM_CRTC__COUNT);
				continue;
			}

			err = drmModeAtomicAddProperty(req, *unused,
						       info->prop_id, 0);
			if (err <= 0)
				ret = -1;

			info = &infos[WDRM_CRTC_MODE_ID];
			err = drmModeAtomicAddProperty(req, *unused,
						       info->prop_id, 0);
			if (err <= 0)
				ret = -1;

			drm_property_info_free(infos, WDRM_CRTC__COUNT);
		}

		/* Disable all the planes; planes which are being used will
		 * override this state in the output-state application. */
		wl_list_for_each(plane, &b->plane_list, link) {
			plane_add_prop(req, plane, WDRM_PLANE_CRTC_ID, 0);
			plane_add_prop(req, plane, WDRM_PLANE_FB_ID, 0);
		}

		flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
	}

	wl_list_for_each(output_state, &pending_state->output_list, link) {
		if (mode == DRM_STATE_APPLY_SYNC)
			assert(output_state->dpms == WESTON_DPMS_OFF);
		ret |= drm_output_apply_state_atomic(output_state, req, &flags);
	}

	if (ret != 0) {
		weston_log("atomic: couldn't compile atomic state\n");
		goto out;
	}

	switch (mode) {
	case DRM_STATE_APPLY_SYNC:
		break;
	case DRM_STATE_APPLY_ASYNC:
		flags |= DRM_MODE_PAGE_FLIP_EVENT | DRM_MODE_ATOMIC_NONBLOCK;
		break;
	case DRM_STATE_TEST_ONLY:
		flags |= DRM_MODE_ATOMIC_TEST_ONLY;
		break;
	}

	/*drm master was set by systemd in PM test, try to set the master back.*/
	if (!(drmGetMagic(b->drm.fd, &magic) == 0 &&
			drmAuthMagic(b->drm.fd, magic) == 0)) {
		drmSetMaster(b->drm.fd);
	}
	ret = drmModeAtomicCommit(b->drm.fd, req, flags, b);

	/* Test commits do not take ownership of the state; return
	 * without freeing here. */
	if (mode == DRM_STATE_TEST_ONLY) {
		drmModeAtomicFree(req);
		return ret;
	}

	if (ret != 0) {
		weston_log("atomic: couldn't commit new state: %m\n");
		goto out;
	}

	wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
			      link)
		drm_output_assign_state(output_state, mode);

	b->state_invalid = false;

	assert(wl_list_empty(&pending_state->output_list));

out:
	if (b->hdr_blob_id > 0) {
		drmModeDestroyPropertyBlob (b->drm.fd, b->hdr_blob_id);
		b->hdr_blob_id = 0;
	}
	drmModeAtomicFree(req);
	drm_pending_state_free(pending_state);
	return ret;
}
#endif

/**
 * Tests a pending state, to see if the kernel will accept the update as
 * constructed.
 *
 * Using atomic modesetting, the kernel performs the same checks as it would
 * on a real commit, returning success or failure without actually modifying
 * the running state. It does not return -EBUSY if there are pending updates
 * in flight, so states may be tested at any point, however this means a
 * state which passed testing may fail on a real commit if the timing is not
 * respected (e.g. committing before the previous commit has completed).
 *
 * Without atomic modesetting, we have no way to check, so we optimistically
 * claim it will work.
 *
 * Unlike drm_pending_state_apply() and drm_pending_state_apply_sync(), this
 * function does _not_ take ownership of pending_state, nor does it clear
 * state_invalid.
 */
static int
drm_pending_state_test(struct drm_pending_state *pending_state)
{
#ifdef HAVE_DRM_ATOMIC
	struct drm_backend *b = pending_state->backend;

	if (b->atomic_modeset)
		return drm_pending_state_apply_atomic(pending_state,
						      DRM_STATE_TEST_ONLY);
#endif

	/* We have no way to test state before application on the legacy
	 * modesetting API, so just claim it succeeded. */
	return 0;
}

/**
 * Applies all of a pending_state asynchronously: the primary entry point for
 * applying KMS state to a device. Updates the state for all outputs in the
 * pending_state, as well as disabling any unclaimed outputs.
 *
 * Unconditionally takes ownership of pending_state, and clears state_invalid.
 */
static int
drm_pending_state_apply(struct drm_pending_state *pending_state)
{
	struct drm_backend *b = pending_state->backend;
	struct drm_output_state *output_state, *tmp;
	uint32_t *unused;

#ifdef HAVE_DRM_ATOMIC
	if (b->atomic_modeset)
		return drm_pending_state_apply_atomic(pending_state,
						      DRM_STATE_APPLY_ASYNC);
#endif

	if (b->state_invalid) {
		/* If we need to reset all our state (e.g. because we've
		 * just started, or just been VT-switched in), explicitly
		 * disable all the CRTCs we aren't using. This also disables
		 * all connectors on these CRTCs, so we don't need to do that
		 * separately with the pre-atomic API. */
		wl_array_for_each(unused, &b->unused_crtcs)
			drmModeSetCrtc(b->drm.fd, *unused, 0, 0, 0, NULL, 0,
				       NULL);
	}

	wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
			      link) {
		struct drm_output *output = output_state->output;
		int ret;

		ret = drm_output_apply_state_legacy(output_state);
		if (ret != 0) {
			weston_log("Couldn't apply state for output %s\n",
				   output->base.name);
		}
	}

	b->state_invalid = false;

	assert(wl_list_empty(&pending_state->output_list));

	drm_pending_state_free(pending_state);

	return 0;
}

/**
 * The synchronous version of drm_pending_state_apply. May only be used to
 * disable outputs. Does so synchronously: the request is guaranteed to have
 * completed on return, and the output will not be touched afterwards.
 *
 * Unconditionally takes ownership of pending_state, and clears state_invalid.
 */
static int
drm_pending_state_apply_sync(struct drm_pending_state *pending_state)
{
	struct drm_backend *b = pending_state->backend;
	struct drm_output_state *output_state, *tmp;
	uint32_t *unused;

#ifdef HAVE_DRM_ATOMIC
	if (b->atomic_modeset)
		return drm_pending_state_apply_atomic(pending_state,
						      DRM_STATE_APPLY_SYNC);
#endif

	if (b->state_invalid) {
		/* If we need to reset all our state (e.g. because we've
		 * just started, or just been VT-switched in), explicitly
		 * disable all the CRTCs we aren't using. This also disables
		 * all connectors on these CRTCs, so we don't need to do that
		 * separately with the pre-atomic API. */
		wl_array_for_each(unused, &b->unused_crtcs)
			drmModeSetCrtc(b->drm.fd, *unused, 0, 0, 0, NULL, 0,
				       NULL);
	}

	wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
			      link) {
		int ret;

		assert(output_state->dpms == WESTON_DPMS_OFF);
		ret = drm_output_apply_state_legacy(output_state);
		if (ret != 0) {
			weston_log("Couldn't apply state for output %s\n",
				   output_state->output->base.name);
		}
	}

	b->state_invalid = false;

	assert(wl_list_empty(&pending_state->output_list));

	drm_pending_state_free(pending_state);

	return 0;
}

static int
drm_output_repaint(struct weston_output *output_base,
		   pixman_region32_t *damage,
		   void *repaint_data)
{
	struct drm_pending_state *pending_state = repaint_data;
	struct drm_output *output = to_drm_output(output_base);
	struct drm_output_state *state = NULL;
	struct drm_plane_state *scanout_state;

	if (output->disable_pending || output->destroy_pending)
		goto err;

	assert(!output->state_last);

	/* If planes have been disabled in the core, we might not have
	 * hit assign_planes at all, so might not have valid output state
	 * here. */
	state = drm_pending_state_get_output(pending_state, output);
	if (!state)
		state = drm_output_state_duplicate(output->state_cur,
						   pending_state,
						   DRM_OUTPUT_STATE_CLEAR_PLANES);
	state->dpms = WESTON_DPMS_ON;

	drm_output_render(state, damage);
	scanout_state = drm_output_state_get_plane(state,
						   output->scanout_plane);
	if (!scanout_state || !scanout_state->fb)
		goto err;

	return 0;

err:
	drm_output_state_free(state);
	return -1;
}

static void
drm_output_start_repaint_loop(struct weston_output *output_base)
{
	struct drm_output *output = to_drm_output(output_base);
	struct drm_pending_state *pending_state;
	struct drm_plane *scanout_plane = output->scanout_plane;
	struct drm_backend *backend =
		to_drm_backend(output_base->compositor);
	struct timespec ts, tnow;
	struct timespec vbl2now;
	int64_t refresh_nsec;
	int ret;
	drmVBlank vbl = {
		.request.type = DRM_VBLANK_RELATIVE,
		.request.sequence = 0,
		.request.signal = 0,
	};

	if (output->disable_pending || output->destroy_pending)
		return;

	if (!output->scanout_plane->state_cur->fb) {
		/* We can't page flip if there's no mode set */
		goto finish_frame;
	}

	/* Need to smash all state in from scratch; current timings might not
	 * be what we want, page flip might not work, etc.
	 */
	if (backend->state_invalid)
		goto finish_frame;

	assert(scanout_plane->state_cur->output == output);

	/* Try to get current msc and timestamp via instant query */
	vbl.request.type |= drm_waitvblank_pipe(output);
	ret = drmWaitVBlank(backend->drm.fd, &vbl);

	/* Error ret or zero timestamp means failure to get valid timestamp */
	if ((ret == 0) && (vbl.reply.tval_sec > 0 || vbl.reply.tval_usec > 0)) {
		ts.tv_sec = vbl.reply.tval_sec;
		ts.tv_nsec = vbl.reply.tval_usec * 1000;

		/* Valid timestamp for most recent vblank - not stale?
		 * Stale ts could happen on Linux 3.17+, so make sure it
		 * is not older than 1 refresh duration since now.
		 */
		weston_compositor_read_presentation_clock(backend->compositor,
							  &tnow);
		timespec_sub(&vbl2now, &tnow, &ts);
		refresh_nsec =
			millihz_to_nsec(output->base.current_mode->refresh);
		if (timespec_to_nsec(&vbl2now) < refresh_nsec) {
			drm_output_update_msc(output, vbl.reply.sequence);
			weston_output_finish_frame(output_base, &ts,
						WP_PRESENTATION_FEEDBACK_INVALID);
			return;
		}
	}

	/* Immediate query didn't provide valid timestamp.
	 * Use pageflip fallback.
	 */

	assert(!output->page_flip_pending);
	assert(!output->state_last);

	pending_state = drm_pending_state_alloc(backend);
	drm_output_state_duplicate(output->state_cur, pending_state,
				   DRM_OUTPUT_STATE_PRESERVE_PLANES);

	ret = drm_pending_state_apply(pending_state);
	if (ret != 0) {
		weston_log("applying repaint-start state failed: %m\n");
		goto finish_frame;
	}

	return;

finish_frame:
	/* if we cannot page-flip, immediately finish frame */
	weston_output_finish_frame(output_base, NULL,
				   WP_PRESENTATION_FEEDBACK_INVALID);
}

static void
drm_output_update_msc(struct drm_output *output, unsigned int seq)
{
	uint64_t msc_hi = output->base.msc >> 32;

	if (seq < (output->base.msc & 0xffffffff))
		msc_hi++;

	output->base.msc = (msc_hi << 32) + seq;
}

static void
vblank_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec,
	       void *data)
{
	struct drm_plane_state *ps = (struct drm_plane_state *) data;
	struct drm_output_state *os = ps->output_state;