[deliverable/linux.git] / drivers / gpu / drm / virtio / virtgpu_display.c

/*
 * Copyright (C) 2015 Red Hat, Inc.
 * All Rights Reserved.
 *
 * Authors:
 *    Dave Airlie
 *    Alon Levy
 *
 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 "virtgpu_drv.h"
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_helper.h>

#define XRES_MIN    32
#define YRES_MIN    32

#define XRES_DEF  1024
#define YRES_DEF   768

#define XRES_MAX  8192
#define YRES_MAX  8192

static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
	.set_config             = drm_atomic_helper_set_config,
	.destroy                = drm_crtc_cleanup,

	.page_flip              = drm_atomic_helper_page_flip,
	.reset                  = drm_atomic_helper_crtc_reset,
	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
	.atomic_destroy_state   = drm_atomic_helper_crtc_destroy_state,
};

static void virtio_gpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct virtio_gpu_framebuffer *virtio_gpu_fb
		= to_virtio_gpu_framebuffer(fb);

	drm_gem_object_unreference_unlocked(virtio_gpu_fb->obj);
	drm_framebuffer_cleanup(fb);
	kfree(virtio_gpu_fb);
}

static int
virtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb,
				     struct drm_file *file_priv,
				     unsigned flags, unsigned color,
				     struct drm_clip_rect *clips,
				     unsigned num_clips)
{
	struct virtio_gpu_framebuffer *virtio_gpu_fb
		= to_virtio_gpu_framebuffer(fb);

	return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips);
}

static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {
	.destroy = virtio_gpu_user_framebuffer_destroy,
	.dirty = virtio_gpu_framebuffer_surface_dirty,
};

int
virtio_gpu_framebuffer_init(struct drm_device *dev,
			    struct virtio_gpu_framebuffer *vgfb,
			    const struct drm_mode_fb_cmd2 *mode_cmd,
			    struct drm_gem_object *obj)
{
	int ret;
	struct virtio_gpu_object *bo;
	vgfb->obj = obj;

	bo = gem_to_virtio_gpu_obj(obj);

	ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);
	if (ret) {
		vgfb->obj = NULL;
		return ret;
	}
	drm_helper_mode_fill_fb_struct(&vgfb->base, mode_cmd);

	spin_lock_init(&vgfb->dirty_lock);
	vgfb->x1 = vgfb->y1 = INT_MAX;
	vgfb->x2 = vgfb->y2 = 0;
	return 0;
}

static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);

	virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
				   crtc->mode.hdisplay,
				   crtc->mode.vdisplay, 0, 0);
}

static void virtio_gpu_crtc_enable(struct drm_crtc *crtc)
{
}

static void virtio_gpu_crtc_disable(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);

	virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
}

static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
					struct drm_crtc_state *state)
{
	return 0;
}

static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
					 struct drm_crtc_state *old_state)
{
	unsigned long flags;

	spin_lock_irqsave(&crtc->dev->event_lock, flags);
	if (crtc->state->event)
		drm_crtc_send_vblank_event(crtc, crtc->state->event);
	crtc->state->event = NULL;
	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
}

static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
	.enable        = virtio_gpu_crtc_enable,
	.disable       = virtio_gpu_crtc_disable,
	.mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
	.atomic_check  = virtio_gpu_crtc_atomic_check,
	.atomic_flush  = virtio_gpu_crtc_atomic_flush,
};

static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,
				    struct drm_display_mode *mode,
				    struct drm_display_mode *adjusted_mode)
{
}

static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
{
}

static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
{
}

static int virtio_gpu_conn_get_modes(struct drm_connector *connector)
{
	struct virtio_gpu_output *output =
		drm_connector_to_virtio_gpu_output(connector);
	struct drm_display_mode *mode = NULL;
	int count, width, height;

	width  = le32_to_cpu(output->info.r.width);
	height = le32_to_cpu(output->info.r.height);
	count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);

	if (width == 0 || height == 0) {
		width = XRES_DEF;
		height = YRES_DEF;
		drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
	} else {
		DRM_DEBUG("add mode: %dx%d\n", width, height);
		mode = drm_cvt_mode(connector->dev, width, height, 60,
				    false, false, false);
		mode->type |= DRM_MODE_TYPE_PREFERRED;
		drm_mode_probed_add(connector, mode);
		count++;
	}

	return count;
}

static int virtio_gpu_conn_mode_valid(struct drm_connector *connector,
				      struct drm_display_mode *mode)
{
	struct virtio_gpu_output *output =
		drm_connector_to_virtio_gpu_output(connector);
	int width, height;

	width  = le32_to_cpu(output->info.r.width);
	height = le32_to_cpu(output->info.r.height);

	if (!(mode->type & DRM_MODE_TYPE_PREFERRED))
		return MODE_OK;
	if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)
		return MODE_OK;
	if (mode->hdisplay <= width  && mode->hdisplay >= width - 16 &&
	    mode->vdisplay <= height && mode->vdisplay >= height - 16)
		return MODE_OK;

	DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);
	return MODE_BAD;
}

static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {
	.mode_set   = virtio_gpu_enc_mode_set,
	.enable     = virtio_gpu_enc_enable,
	.disable    = virtio_gpu_enc_disable,
};

static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {
	.get_modes    = virtio_gpu_conn_get_modes,
	.mode_valid   = virtio_gpu_conn_mode_valid,
};

static enum drm_connector_status virtio_gpu_conn_detect(
			struct drm_connector *connector,
			bool force)
{
	struct virtio_gpu_output *output =
		drm_connector_to_virtio_gpu_output(connector);

	if (output->info.enabled)
		return connector_status_connected;
	else
		return connector_status_disconnected;
}

static void virtio_gpu_conn_destroy(struct drm_connector *connector)
{
	struct virtio_gpu_output *virtio_gpu_output =
		drm_connector_to_virtio_gpu_output(connector);

	drm_connector_unregister(connector);
	drm_connector_cleanup(connector);
	kfree(virtio_gpu_output);
}

static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
	.dpms = drm_atomic_helper_connector_dpms,
	.detect = virtio_gpu_conn_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = virtio_gpu_conn_destroy,
	.reset = drm_atomic_helper_connector_reset,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};

static const struct drm_encoder_funcs virtio_gpu_enc_funcs = {
	.destroy = drm_encoder_cleanup,
};

static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
{
	struct drm_device *dev = vgdev->ddev;
	struct virtio_gpu_output *output = vgdev->outputs + index;
	struct drm_connector *connector = &output->conn;
	struct drm_encoder *encoder = &output->enc;
	struct drm_crtc *crtc = &output->crtc;
	struct drm_plane *primary, *cursor;

	output->index = index;
	if (index == 0) {
		output->info.enabled = cpu_to_le32(true);
		output->info.r.width = cpu_to_le32(XRES_DEF);
		output->info.r.height = cpu_to_le32(YRES_DEF);
	}

	primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index);
	if (IS_ERR(primary))
		return PTR_ERR(primary);
	cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);
	if (IS_ERR(cursor))
		return PTR_ERR(cursor);
	drm_crtc_init_with_planes(dev, crtc, primary, cursor,
				  &virtio_gpu_crtc_funcs, NULL);
	drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
	primary->crtc = crtc;
	cursor->crtc = crtc;

	drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
			   DRM_MODE_CONNECTOR_VIRTUAL);
	drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs);

	drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,
			 DRM_MODE_ENCODER_VIRTUAL, NULL);
	drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);
	encoder->possible_crtcs = 1 << index;

	drm_mode_connector_attach_encoder(connector, encoder);
	drm_connector_register(connector);
	return 0;
}

static struct drm_framebuffer *
virtio_gpu_user_framebuffer_create(struct drm_device *dev,
				   struct drm_file *file_priv,
				   const struct drm_mode_fb_cmd2 *mode_cmd)
{
	struct drm_gem_object *obj = NULL;
	struct virtio_gpu_framebuffer *virtio_gpu_fb;
	int ret;

	/* lookup object associated with res handle */
	obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
	if (!obj)
		return ERR_PTR(-EINVAL);

	virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
	if (virtio_gpu_fb == NULL)
		return ERR_PTR(-ENOMEM);

	ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
	if (ret) {
		kfree(virtio_gpu_fb);
		drm_gem_object_unreference_unlocked(obj);
		return NULL;
	}

	return &virtio_gpu_fb->base;
}

static void vgdev_atomic_commit_tail(struct drm_atomic_state *state)
{
	struct drm_device *dev = state->dev;

	drm_atomic_helper_commit_modeset_disables(dev, state);
	drm_atomic_helper_commit_modeset_enables(dev, state);
	drm_atomic_helper_commit_planes(dev, state,
					DRM_PLANE_COMMIT_ACTIVE_ONLY);

	drm_atomic_helper_commit_hw_done(state);

	drm_atomic_helper_wait_for_vblanks(dev, state);
	drm_atomic_helper_cleanup_planes(dev, state);
}

static struct drm_mode_config_helper_funcs virtio_mode_config_helpers = {
	.atomic_commit_tail = vgdev_atomic_commit_tail,
};

static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
	.fb_create = virtio_gpu_user_framebuffer_create,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
{
	int i;

	drm_mode_config_init(vgdev->ddev);
	vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs;
	vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers;

	/* modes will be validated against the framebuffer size */
	vgdev->ddev->mode_config.min_width = XRES_MIN;
	vgdev->ddev->mode_config.min_height = YRES_MIN;
	vgdev->ddev->mode_config.max_width = XRES_MAX;
	vgdev->ddev->mode_config.max_height = YRES_MAX;

	for (i = 0 ; i < vgdev->num_scanouts; ++i)
		vgdev_output_init(vgdev, i);

        drm_mode_config_reset(vgdev->ddev);
	return 0;
}

void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
{
	virtio_gpu_fbdev_fini(vgdev);
	drm_mode_config_cleanup(vgdev->ddev);
}
Commit	Line	Data
dc5698e8 DA	1	/*
	2	* Copyright (C) 2015 Red Hat, Inc.
	3	* All Rights Reserved.
	4	*
	5	* Authors:
	6	* Dave Airlie
	7	* Alon Levy
	8	*
	9	* Permission is hereby granted, free of charge, to any person obtaining a
	10	* copy of this software and associated documentation files (the "Software"),
	11	* to deal in the Software without restriction, including without limitation
	12	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	13	* and/or sell copies of the Software, and to permit persons to whom the
	14	* Software is furnished to do so, subject to the following conditions:
	15	*
	16	* The above copyright notice and this permission notice shall be included in
	17	* all copies or substantial portions of the Software.
	18	*
	19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	20	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	22	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	23	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	24	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	25	* OTHER DEALINGS IN THE SOFTWARE.
	26	*/
	27
	28	#include "virtgpu_drv.h"
	29	#include <drm/drm_crtc_helper.h>
	30	#include <drm/drm_atomic_helper.h>
	31
bbbed888 GH	32	#define XRES_MIN 32
bbbed888 GH	33	#define YRES_MIN 32
dc5698e8 DA	34
	35	#define XRES_DEF 1024
	36	#define YRES_DEF 768
	37
	38	#define XRES_MAX 8192
	39	#define YRES_MAX 8192
	40
dc5698e8	41	static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
dc5698e8 DA	42	.set_config = drm_atomic_helper_set_config,
	43	.destroy = drm_crtc_cleanup,
	44
0d841ac0	45	.page_flip = drm_atomic_helper_page_flip,
dc5698e8 DA	46	.reset = drm_atomic_helper_crtc_reset,
	47	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
	48	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
	49	};
	50
	51	static void virtio_gpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
	52	{
	53	struct virtio_gpu_framebuffer *virtio_gpu_fb
	54	= to_virtio_gpu_framebuffer(fb);
	55
5345a5ab	56	drm_gem_object_unreference_unlocked(virtio_gpu_fb->obj);
dc5698e8 DA	57	drm_framebuffer_cleanup(fb);
	58	kfree(virtio_gpu_fb);
	59	}
	60
	61	static int
	62	virtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb,
	63	struct drm_file *file_priv,
	64	unsigned flags, unsigned color,
	65	struct drm_clip_rect *clips,
	66	unsigned num_clips)
	67	{
	68	struct virtio_gpu_framebuffer *virtio_gpu_fb
	69	= to_virtio_gpu_framebuffer(fb);
	70
	71	return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips);
	72	}
	73
	74	static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {
	75	.destroy = virtio_gpu_user_framebuffer_destroy,
	76	.dirty = virtio_gpu_framebuffer_surface_dirty,
	77	};
	78
	79	int
	80	virtio_gpu_framebuffer_init(struct drm_device *dev,
	81	struct virtio_gpu_framebuffer *vgfb,
1eb83451	82	const struct drm_mode_fb_cmd2 *mode_cmd,
dc5698e8 DA	83	struct drm_gem_object *obj)
	84	{
	85	int ret;
	86	struct virtio_gpu_object *bo;
	87	vgfb->obj = obj;
	88
	89	bo = gem_to_virtio_gpu_obj(obj);
	90
	91	ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);
	92	if (ret) {
	93	vgfb->obj = NULL;
	94	return ret;
	95	}
	96	drm_helper_mode_fill_fb_struct(&vgfb->base, mode_cmd);
	97
	98	spin_lock_init(&vgfb->dirty_lock);
	99	vgfb->x1 = vgfb->y1 = INT_MAX;
	100	vgfb->x2 = vgfb->y2 = 0;
	101	return 0;
	102	}
	103
dc5698e8 DA	104	static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
	105	{
	106	struct drm_device *dev = crtc->dev;
	107	struct virtio_gpu_device *vgdev = dev->dev_private;
	108	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
	109
	110	virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
	111	crtc->mode.hdisplay,
	112	crtc->mode.vdisplay, 0, 0);
	113	}
	114
	115	static void virtio_gpu_crtc_enable(struct drm_crtc *crtc)
	116	{
	117	}
	118
	119	static void virtio_gpu_crtc_disable(struct drm_crtc *crtc)
	120	{
	121	struct drm_device *dev = crtc->dev;
	122	struct virtio_gpu_device *vgdev = dev->dev_private;
	123	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
	124
	125	virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
	126	}
	127
	128	static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
	129	struct drm_crtc_state *state)
	130	{
	131	return 0;
	132	}
	133
9a11d2e7 GP	134	static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
	135	struct drm_crtc_state *old_state)
	136	{
	137	unsigned long flags;
	138
	139	spin_lock_irqsave(&crtc->dev->event_lock, flags);
	140	if (crtc->state->event)
	141	drm_crtc_send_vblank_event(crtc, crtc->state->event);
0d841ac0	142	crtc->state->event = NULL;
9a11d2e7 GP	143	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
	144	}
	145
dc5698e8 DA	146	static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
	147	.enable = virtio_gpu_crtc_enable,
	148	.disable = virtio_gpu_crtc_disable,
dc5698e8 DA	149	.mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
dc5698e8 DA	150	.atomic_check = virtio_gpu_crtc_atomic_check,
9a11d2e7	151	.atomic_flush = virtio_gpu_crtc_atomic_flush,
dc5698e8 DA	152	};
dc5698e8 DA	153
dc5698e8 DA	154	static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,
	155	struct drm_display_mode *mode,
	156	struct drm_display_mode *adjusted_mode)
	157	{
	158	}
	159
	160	static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
	161	{
	162	}
	163
	164	static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
	165	{
	166	}
	167
	168	static int virtio_gpu_conn_get_modes(struct drm_connector *connector)
	169	{
	170	struct virtio_gpu_output *output =
	171	drm_connector_to_virtio_gpu_output(connector);
	172	struct drm_display_mode *mode = NULL;
	173	int count, width, height;
	174
	175	width = le32_to_cpu(output->info.r.width);
	176	height = le32_to_cpu(output->info.r.height);
	177	count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
	178
	179	if (width == 0 \|\| height == 0) {
	180	width = XRES_DEF;
	181	height = YRES_DEF;
	182	drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
	183	} else {
	184	DRM_DEBUG("add mode: %dx%d\n", width, height);
	185	mode = drm_cvt_mode(connector->dev, width, height, 60,
	186	false, false, false);
	187	mode->type \|= DRM_MODE_TYPE_PREFERRED;
	188	drm_mode_probed_add(connector, mode);
	189	count++;
	190	}
	191
	192	return count;
	193	}
	194
	195	static int virtio_gpu_conn_mode_valid(struct drm_connector *connector,
	196	struct drm_display_mode *mode)
	197	{
	198	struct virtio_gpu_output *output =
	199	drm_connector_to_virtio_gpu_output(connector);
	200	int width, height;
	201
	202	width = le32_to_cpu(output->info.r.width);
	203	height = le32_to_cpu(output->info.r.height);
	204
	205	if (!(mode->type & DRM_MODE_TYPE_PREFERRED))
	206	return MODE_OK;
	207	if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)
	208	return MODE_OK;
	209	if (mode->hdisplay <= width && mode->hdisplay >= width - 16 &&
	210	mode->vdisplay <= height && mode->vdisplay >= height - 16)
	211	return MODE_OK;
	212
	213	DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);
	214	return MODE_BAD;
	215	}
	216
dc5698e8	217	static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {
dc5698e8 DA	218	.mode_set = virtio_gpu_enc_mode_set,
	219	.enable = virtio_gpu_enc_enable,
	220	.disable = virtio_gpu_enc_disable,
	221	};
	222
	223	static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {
	224	.get_modes = virtio_gpu_conn_get_modes,
	225	.mode_valid = virtio_gpu_conn_mode_valid,
dc5698e8 DA	226	};
dc5698e8 DA	227
dc5698e8 DA	228	static enum drm_connector_status virtio_gpu_conn_detect(
	229	struct drm_connector *connector,
	230	bool force)
	231	{
	232	struct virtio_gpu_output *output =
	233	drm_connector_to_virtio_gpu_output(connector);
	234
	235	if (output->info.enabled)
	236	return connector_status_connected;
	237	else
	238	return connector_status_disconnected;
	239	}
	240
	241	static void virtio_gpu_conn_destroy(struct drm_connector *connector)
	242	{
	243	struct virtio_gpu_output *virtio_gpu_output =
	244	drm_connector_to_virtio_gpu_output(connector);
	245
	246	drm_connector_unregister(connector);
	247	drm_connector_cleanup(connector);
	248	kfree(virtio_gpu_output);
	249	}
	250
	251	static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
	252	.dpms = drm_atomic_helper_connector_dpms,
dc5698e8	253	.detect = virtio_gpu_conn_detect,
6af3e656	254	.fill_modes = drm_helper_probe_single_connector_modes,
dc5698e8 DA	255	.destroy = virtio_gpu_conn_destroy,
	256	.reset = drm_atomic_helper_connector_reset,
	257	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	258	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
	259	};
	260
	261	static const struct drm_encoder_funcs virtio_gpu_enc_funcs = {
	262	.destroy = drm_encoder_cleanup,
	263	};
	264
	265	static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
	266	{
	267	struct drm_device *dev = vgdev->ddev;
	268	struct virtio_gpu_output *output = vgdev->outputs + index;
	269	struct drm_connector *connector = &output->conn;
	270	struct drm_encoder *encoder = &output->enc;
	271	struct drm_crtc *crtc = &output->crtc;
bbbed888	272	struct drm_plane primary, cursor;
dc5698e8 DA	273
	274	output->index = index;
	275	if (index == 0) {
	276	output->info.enabled = cpu_to_le32(true);
	277	output->info.r.width = cpu_to_le32(XRES_DEF);
	278	output->info.r.height = cpu_to_le32(YRES_DEF);
	279	}
	280
bbbed888 GH	281	primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index);
	282	if (IS_ERR(primary))
	283	return PTR_ERR(primary);
	284	cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);
	285	if (IS_ERR(cursor))
	286	return PTR_ERR(cursor);
	287	drm_crtc_init_with_planes(dev, crtc, primary, cursor,
f9882876	288	&virtio_gpu_crtc_funcs, NULL);
dc5698e8	289	drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
bbbed888 GH	290	primary->crtc = crtc;
bbbed888 GH	291	cursor->crtc = crtc;
dc5698e8 DA	292
	293	drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
	294	DRM_MODE_CONNECTOR_VIRTUAL);
	295	drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs);
	296
	297	drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,
13a3d91f	298	DRM_MODE_ENCODER_VIRTUAL, NULL);
dc5698e8 DA	299	drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);
	300	encoder->possible_crtcs = 1 << index;
	301
	302	drm_mode_connector_attach_encoder(connector, encoder);
	303	drm_connector_register(connector);
	304	return 0;
	305	}
	306
	307	static struct drm_framebuffer *
	308	virtio_gpu_user_framebuffer_create(struct drm_device *dev,
	309	struct drm_file *file_priv,
1eb83451	310	const struct drm_mode_fb_cmd2 *mode_cmd)
dc5698e8 DA	311	{
	312	struct drm_gem_object *obj = NULL;
	313	struct virtio_gpu_framebuffer *virtio_gpu_fb;
	314	int ret;
	315
	316	/* lookup object associated with res handle */
a8ad0bd8	317	obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
dc5698e8 DA	318	if (!obj)
	319	return ERR_PTR(-EINVAL);
	320
	321	virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
	322	if (virtio_gpu_fb == NULL)
	323	return ERR_PTR(-ENOMEM);
	324
	325	ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
	326	if (ret) {
	327	kfree(virtio_gpu_fb);
5345a5ab	328	drm_gem_object_unreference_unlocked(obj);
dc5698e8 DA	329	return NULL;
	330	}
	331
	332	return &virtio_gpu_fb->base;
	333	}
	334
0d841ac0	335	static void vgdev_atomic_commit_tail(struct drm_atomic_state *state)
e7cf0963	336	{
0d841ac0	337	struct drm_device *dev = state->dev;
e7cf0963 GH	338
	339	drm_atomic_helper_commit_modeset_disables(dev, state);
	340	drm_atomic_helper_commit_modeset_enables(dev, state);
2b58e98d LY	341	drm_atomic_helper_commit_planes(dev, state,
2b58e98d LY	342	DRM_PLANE_COMMIT_ACTIVE_ONLY);
e7cf0963	343
0d841ac0 DV	344	drm_atomic_helper_commit_hw_done(state);
0d841ac0 DV	345
e7cf0963 GH	346	drm_atomic_helper_wait_for_vblanks(dev, state);
e7cf0963 GH	347	drm_atomic_helper_cleanup_planes(dev, state);
e7cf0963 GH	348	}
e7cf0963 GH	349
a9853117	350	static struct drm_mode_config_helper_funcs virtio_mode_config_helpers = {
0d841ac0 DV	351	.atomic_commit_tail = vgdev_atomic_commit_tail,
	352	};
	353
dc5698e8 DA	354	static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
	355	.fb_create = virtio_gpu_user_framebuffer_create,
	356	.atomic_check = drm_atomic_helper_check,
0d841ac0	357	.atomic_commit = drm_atomic_helper_commit,
dc5698e8 DA	358	};
	359
	360	int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
	361	{
	362	int i;
	363
	364	drm_mode_config_init(vgdev->ddev);
0d841ac0 DV	365	vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs;
0d841ac0 DV	366	vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers;
dc5698e8 DA	367
	368	/* modes will be validated against the framebuffer size */
	369	vgdev->ddev->mode_config.min_width = XRES_MIN;
	370	vgdev->ddev->mode_config.min_height = YRES_MIN;
	371	vgdev->ddev->mode_config.max_width = XRES_MAX;
	372	vgdev->ddev->mode_config.max_height = YRES_MAX;
	373
	374	for (i = 0 ; i < vgdev->num_scanouts; ++i)
	375	vgdev_output_init(vgdev, i);
	376
	377	drm_mode_config_reset(vgdev->ddev);
	378	return 0;
	379	}
	380
	381	void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
	382	{
	383	virtio_gpu_fbdev_fini(vgdev);
	384	drm_mode_config_cleanup(vgdev->ddev);
	385	}