[mirror_ubuntu-zesty-kernel.git] / drivers / gpu / drm / exynos / exynos_drm_vidi.c

/* exynos_drm_vidi.c
 *
 * Copyright (C) 2012 Samsung Electronics Co.Ltd
 * Authors:
 *	Inki Dae <inki.dae@samsung.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */
#include <drm/drmP.h>

#include <linux/kernel.h>
#include <linux/platform_device.h>

#include <drm/exynos_drm.h>

#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>

#include "exynos_drm_drv.h"
#include "exynos_drm_crtc.h"
#include "exynos_drm_encoder.h"
#include "exynos_drm_vidi.h"

/* vidi has totally three virtual windows. */
#define WINDOWS_NR		3

#define get_vidi_mgr(dev)	platform_get_drvdata(to_platform_device(dev))
#define ctx_from_connector(c)	container_of(c, struct vidi_context, \
					connector)

struct vidi_win_data {
	unsigned int		offset_x;
	unsigned int		offset_y;
	unsigned int		ovl_width;
	unsigned int		ovl_height;
	unsigned int		fb_width;
	unsigned int		fb_height;
	unsigned int		bpp;
	dma_addr_t		dma_addr;
	unsigned int		buf_offsize;
	unsigned int		line_size;	/* bytes */
	bool			enabled;
};

struct vidi_context {
	struct drm_device		*drm_dev;
	struct drm_crtc			*crtc;
	struct drm_encoder		*encoder;
	struct drm_connector		connector;
	struct exynos_drm_subdrv	subdrv;
	struct vidi_win_data		win_data[WINDOWS_NR];
	struct edid			*raw_edid;
	unsigned int			clkdiv;
	unsigned int			default_win;
	unsigned long			irq_flags;
	unsigned int			connected;
	bool				vblank_on;
	bool				suspended;
	bool				direct_vblank;
	struct work_struct		work;
	struct mutex			lock;
	int				pipe;
};

static const char fake_edid_info[] = {
	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
	0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
	0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
	0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
	0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
	0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
	0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
	0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
	0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
	0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
	0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
	0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
	0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
	0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
	0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x06
};

static void vidi_apply(struct exynos_drm_manager *mgr)
{
	struct vidi_context *ctx = mgr->ctx;
	struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
	struct vidi_win_data *win_data;
	int i;

	for (i = 0; i < WINDOWS_NR; i++) {
		win_data = &ctx->win_data[i];
		if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
			mgr_ops->win_commit(mgr, i);
	}

	if (mgr_ops && mgr_ops->commit)
		mgr_ops->commit(mgr);
}

static void vidi_commit(struct exynos_drm_manager *mgr)
{
	struct vidi_context *ctx = mgr->ctx;

	if (ctx->suspended)
		return;
}

static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
{
	struct vidi_context *ctx = mgr->ctx;

	if (ctx->suspended)
		return -EPERM;

	if (!test_and_set_bit(0, &ctx->irq_flags))
		ctx->vblank_on = true;

	ctx->direct_vblank = true;

	/*
	 * in case of page flip request, vidi_finish_pageflip function
	 * will not be called because direct_vblank is true and then
	 * that function will be called by manager_ops->win_commit callback
	 */
	schedule_work(&ctx->work);

	return 0;
}

static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
{
	struct vidi_context *ctx = mgr->ctx;

	if (ctx->suspended)
		return;

	if (test_and_clear_bit(0, &ctx->irq_flags))
		ctx->vblank_on = false;
}

static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
			struct exynos_drm_overlay *overlay)
{
	struct vidi_context *ctx = mgr->ctx;
	struct vidi_win_data *win_data;
	int win;
	unsigned long offset;

	if (!overlay) {
		DRM_ERROR("overlay is NULL\n");
		return;
	}

	win = overlay->zpos;
	if (win == DEFAULT_ZPOS)
		win = ctx->default_win;

	if (win < 0 || win >= WINDOWS_NR)
		return;

	offset = overlay->fb_x * (overlay->bpp >> 3);
	offset += overlay->fb_y * overlay->pitch;

	DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);

	win_data = &ctx->win_data[win];

	win_data->offset_x = overlay->crtc_x;
	win_data->offset_y = overlay->crtc_y;
	win_data->ovl_width = overlay->crtc_width;
	win_data->ovl_height = overlay->crtc_height;
	win_data->fb_width = overlay->fb_width;
	win_data->fb_height = overlay->fb_height;
	win_data->dma_addr = overlay->dma_addr[0] + offset;
	win_data->bpp = overlay->bpp;
	win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
				(overlay->bpp >> 3);
	win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);

	/*
	 * some parts of win_data should be transferred to user side
	 * through specific ioctl.
	 */

	DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
			win_data->offset_x, win_data->offset_y);
	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
			win_data->ovl_width, win_data->ovl_height);
	DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
	DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
			overlay->fb_width, overlay->crtc_width);
}

static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
{
	struct vidi_context *ctx = mgr->ctx;
	struct vidi_win_data *win_data;
	int win = zpos;

	if (ctx->suspended)
		return;

	if (win == DEFAULT_ZPOS)
		win = ctx->default_win;

	if (win < 0 || win >= WINDOWS_NR)
		return;

	win_data = &ctx->win_data[win];

	win_data->enabled = true;

	DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr);

	if (ctx->vblank_on)
		schedule_work(&ctx->work);
}

static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
{
	struct vidi_context *ctx = mgr->ctx;
	struct vidi_win_data *win_data;
	int win = zpos;

	if (win == DEFAULT_ZPOS)
		win = ctx->default_win;

	if (win < 0 || win >= WINDOWS_NR)
		return;

	win_data = &ctx->win_data[win];
	win_data->enabled = false;

	/* TODO. */
}

static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
{
	struct vidi_context *ctx = mgr->ctx;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	if (enable != false && enable != true)
		return -EINVAL;

	if (enable) {
		ctx->suspended = false;

		/* if vblank was enabled status, enable it again. */
		if (test_and_clear_bit(0, &ctx->irq_flags))
			vidi_enable_vblank(mgr);

		vidi_apply(mgr);
	} else {
		ctx->suspended = true;
	}

	return 0;
}

static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
{
	struct vidi_context *ctx = mgr->ctx;

	DRM_DEBUG_KMS("%d\n", mode);

	mutex_lock(&ctx->lock);

	switch (mode) {
	case DRM_MODE_DPMS_ON:
		vidi_power_on(mgr, true);
		break;
	case DRM_MODE_DPMS_STANDBY:
	case DRM_MODE_DPMS_SUSPEND:
	case DRM_MODE_DPMS_OFF:
		vidi_power_on(mgr, false);
		break;
	default:
		DRM_DEBUG_KMS("unspecified mode %d\n", mode);
		break;
	}

	mutex_unlock(&ctx->lock);
}

static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
			struct drm_device *drm_dev)
{
	struct vidi_context *ctx = mgr->ctx;
	struct exynos_drm_private *priv = drm_dev->dev_private;

	mgr->drm_dev = ctx->drm_dev = drm_dev;
	mgr->pipe = ctx->pipe = priv->pipe++;

	/*
	 * enable drm irq mode.
	 * - with irq_enabled = 1, we can use the vblank feature.
	 *
	 * P.S. note that we wouldn't use drm irq handler but
	 *	just specific driver own one instead because
	 *	drm framework supports only one irq handler.
	 */
	drm_dev->irq_enabled = 1;

	/*
	 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
	 * by drm timer once a current process gives up ownership of
	 * vblank event.(after drm_vblank_put function is called)
	 */
	drm_dev->vblank_disable_allowed = 1;

	return 0;
}

static struct exynos_drm_manager_ops vidi_manager_ops = {
	.dpms = vidi_dpms,
	.commit = vidi_commit,
	.enable_vblank = vidi_enable_vblank,
	.disable_vblank = vidi_disable_vblank,
	.win_mode_set = vidi_win_mode_set,
	.win_commit = vidi_win_commit,
	.win_disable = vidi_win_disable,
};

static struct exynos_drm_manager vidi_manager = {
	.type = EXYNOS_DISPLAY_TYPE_VIDI,
	.ops = &vidi_manager_ops,
};

static void vidi_fake_vblank_handler(struct work_struct *work)
{
	struct vidi_context *ctx = container_of(work, struct vidi_context,
					work);

	if (ctx->pipe < 0)
		return;

	/* refresh rate is about 50Hz. */
	usleep_range(16000, 20000);

	mutex_lock(&ctx->lock);

	if (ctx->direct_vblank) {
		drm_handle_vblank(ctx->drm_dev, ctx->pipe);
		ctx->direct_vblank = false;
		mutex_unlock(&ctx->lock);
		return;
	}

	mutex_unlock(&ctx->lock);

	exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
}

static int vidi_show_connection(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	int rc;
	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
	struct vidi_context *ctx = mgr->ctx;

	mutex_lock(&ctx->lock);

	rc = sprintf(buf, "%d\n", ctx->connected);

	mutex_unlock(&ctx->lock);

	return rc;
}

static int vidi_store_connection(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t len)
{
	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
	struct vidi_context *ctx = mgr->ctx;
	int ret;

	ret = kstrtoint(buf, 0, &ctx->connected);
	if (ret)
		return ret;

	if (ctx->connected > 1)
		return -EINVAL;

	/* use fake edid data for test. */
	if (!ctx->raw_edid)
		ctx->raw_edid = (struct edid *)fake_edid_info;

	/* if raw_edid isn't same as fake data then it can't be tested. */
	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
		DRM_DEBUG_KMS("edid data is not fake data.\n");
		return -EINVAL;
	}

	DRM_DEBUG_KMS("requested connection.\n");

	drm_helper_hpd_irq_event(ctx->drm_dev);

	return len;
}

static DEVICE_ATTR(connection, 0644, vidi_show_connection,
			vidi_store_connection);

int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
				struct drm_file *file_priv)
{
	struct vidi_context *ctx = NULL;
	struct drm_encoder *encoder;
	struct exynos_drm_display *display;
	struct drm_exynos_vidi_connection *vidi = data;

	if (!vidi) {
		DRM_DEBUG_KMS("user data for vidi is null.\n");
		return -EINVAL;
	}

	if (vidi->connection > 1) {
		DRM_DEBUG_KMS("connection should be 0 or 1.\n");
		return -EINVAL;
	}

	list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
								head) {
		display = exynos_drm_get_display(encoder);

		if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
			ctx = display->ctx;
			break;
		}
	}

	if (!ctx) {
		DRM_DEBUG_KMS("not found virtual device type encoder.\n");
		return -EINVAL;
	}

	if (ctx->connected == vidi->connection) {
		DRM_DEBUG_KMS("same connection request.\n");
		return -EINVAL;
	}

	if (vidi->connection) {
		struct edid *raw_edid  = (struct edid *)(uint32_t)vidi->edid;
		if (!drm_edid_is_valid(raw_edid)) {
			DRM_DEBUG_KMS("edid data is invalid.\n");
			return -EINVAL;
		}
		ctx->raw_edid = drm_edid_duplicate(raw_edid);
		if (!ctx->raw_edid) {
			DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
			return -ENOMEM;
		}
	} else {
		/*
		 * with connection = 0, free raw_edid
		 * only if raw edid data isn't same as fake data.
		 */
		if (ctx->raw_edid && ctx->raw_edid !=
				(struct edid *)fake_edid_info) {
			kfree(ctx->raw_edid);
			ctx->raw_edid = NULL;
		}
	}

	ctx->connected = vidi->connection;
	drm_helper_hpd_irq_event(ctx->drm_dev);

	return 0;
}

static enum drm_connector_status vidi_detect(struct drm_connector *connector,
			bool force)
{
	struct vidi_context *ctx = ctx_from_connector(connector);

	/*
	 * connection request would come from user side
	 * to do hotplug through specific ioctl.
	 */
	return ctx->connected ? connector_status_connected :
			connector_status_disconnected;
}

static void vidi_connector_destroy(struct drm_connector *connector)
{
}

static struct drm_connector_funcs vidi_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.detect = vidi_detect,
	.destroy = vidi_connector_destroy,
};

static int vidi_get_modes(struct drm_connector *connector)
{
	struct vidi_context *ctx = ctx_from_connector(connector);
	struct edid *edid;
	int edid_len;

	/*
	 * the edid data comes from user side and it would be set
	 * to ctx->raw_edid through specific ioctl.
	 */
	if (!ctx->raw_edid) {
		DRM_DEBUG_KMS("raw_edid is null.\n");
		return -EFAULT;
	}

	edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
	edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
	if (!edid) {
		DRM_DEBUG_KMS("failed to allocate edid\n");
		return -ENOMEM;
	}

	drm_mode_connector_update_edid_property(connector, edid);

	return drm_add_edid_modes(connector, edid);
}

static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
{
	struct vidi_context *ctx = ctx_from_connector(connector);

	return ctx->encoder;
}

static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
	.get_modes = vidi_get_modes,
	.best_encoder = vidi_best_encoder,
};

static int vidi_create_connector(struct exynos_drm_display *display,
				struct drm_encoder *encoder)
{
	struct vidi_context *ctx = display->ctx;
	struct drm_connector *connector = &ctx->connector;
	int ret;

	ctx->encoder = encoder;
	connector->polled = DRM_CONNECTOR_POLL_HPD;

	ret = drm_connector_init(ctx->drm_dev, connector,
			&vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
	if (ret) {
		DRM_ERROR("Failed to initialize connector with drm\n");
		return ret;
	}

	drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
	drm_connector_register(connector);
	drm_mode_connector_attach_encoder(connector, encoder);

	return 0;
}


static struct exynos_drm_display_ops vidi_display_ops = {
	.create_connector = vidi_create_connector,
};

static struct exynos_drm_display vidi_display = {
	.type = EXYNOS_DISPLAY_TYPE_VIDI,
	.ops = &vidi_display_ops,
};

static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
{
	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
	struct vidi_context *ctx = mgr->ctx;
	struct drm_crtc *crtc = ctx->crtc;
	int ret;

	vidi_mgr_initialize(mgr, drm_dev);

	ret = exynos_drm_crtc_create(&vidi_manager);
	if (ret) {
		DRM_ERROR("failed to create crtc.\n");
		return ret;
	}

	ret = exynos_drm_create_enc_conn(drm_dev, &vidi_display);
	if (ret) {
		crtc->funcs->destroy(crtc);
		DRM_ERROR("failed to create encoder and connector.\n");
		return ret;
	}

	return 0;
}

static int vidi_probe(struct platform_device *pdev)
{
	struct exynos_drm_subdrv *subdrv;
	struct vidi_context *ctx;
	int ret;

	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;

	ctx->default_win = 0;

	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);

	vidi_manager.ctx = ctx;
	vidi_display.ctx = ctx;

	mutex_init(&ctx->lock);

	platform_set_drvdata(pdev, &vidi_manager);

	subdrv = &ctx->subdrv;
	subdrv->dev = &pdev->dev;
	subdrv->probe = vidi_subdrv_probe;

	ret = exynos_drm_subdrv_register(subdrv);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to register drm vidi device\n");
		return ret;
	}

	ret = device_create_file(&pdev->dev, &dev_attr_connection);
	if (ret < 0) {
		exynos_drm_subdrv_unregister(subdrv);
		DRM_INFO("failed to create connection sysfs.\n");
	}

	return 0;
}

static int vidi_remove(struct platform_device *pdev)
{
	struct exynos_drm_manager *mgr = platform_get_drvdata(pdev);
	struct vidi_context *ctx = mgr->ctx;
	struct drm_encoder *encoder = ctx->encoder;
	struct drm_crtc *crtc = mgr->crtc;

	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
		kfree(ctx->raw_edid);
		ctx->raw_edid = NULL;

		return -EINVAL;
	}

	crtc->funcs->destroy(crtc);
	encoder->funcs->destroy(encoder);
	drm_connector_cleanup(&ctx->connector);

	return 0;
}

struct platform_driver vidi_driver = {
	.probe		= vidi_probe,
	.remove		= vidi_remove,
	.driver		= {
		.name	= "exynos-drm-vidi",
		.owner	= THIS_MODULE,
	},
};

int exynos_drm_probe_vidi(void)
{
	struct platform_device *pdev;
	int ret;

	pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0);
	if (IS_ERR(pdev))
		return PTR_ERR(pdev);

	ret = platform_driver_register(&vidi_driver);
	if (ret) {
		platform_device_unregister(pdev);
		return ret;
	}

	return ret;
}

void exynos_drm_remove_vidi(void)
{
	struct vidi_context *ctx = vidi_manager.ctx;
	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
	struct platform_device *pdev = to_platform_device(subdrv->dev);

	platform_driver_unregister(&vidi_driver);
	platform_device_unregister(pdev);
}
Commit	Line	Data
b73d1230 ID	1	/* exynos_drm_vidi.c
	2	*
	3	* Copyright (C) 2012 Samsung Electronics Co.Ltd
	4	* Authors:
	5	* Inki Dae <inki.dae@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*
	12	*/
760285e7	13	#include <drm/drmP.h>
b73d1230 ID	14
b73d1230 ID	15	#include <linux/kernel.h>
b73d1230 ID	16	#include <linux/platform_device.h>
	17
	18	#include <drm/exynos_drm.h>
	19
760285e7 DH	20	#include <drm/drm_edid.h>
760285e7 DH	21	#include <drm/drm_crtc_helper.h>
b73d1230 ID	22
	23	#include "exynos_drm_drv.h"
	24	#include "exynos_drm_crtc.h"
	25	#include "exynos_drm_encoder.h"
e30655d0	26	#include "exynos_drm_vidi.h"
b73d1230 ID	27
	28	/* vidi has totally three virtual windows. */
	29	#define WINDOWS_NR 3
	30
bb7704d6	31	#define get_vidi_mgr(dev) platform_get_drvdata(to_platform_device(dev))
ce6cb556 SP	32	#define ctx_from_connector(c) container_of(c, struct vidi_context, \
ce6cb556 SP	33	connector)
b73d1230 ID	34
	35	struct vidi_win_data {
	36	unsigned int offset_x;
	37	unsigned int offset_y;
	38	unsigned int ovl_width;
	39	unsigned int ovl_height;
	40	unsigned int fb_width;
	41	unsigned int fb_height;
	42	unsigned int bpp;
	43	dma_addr_t dma_addr;
b73d1230 ID	44	unsigned int buf_offsize;
	45	unsigned int line_size; /* bytes */
	46	bool enabled;
	47	};
	48
	49	struct vidi_context {
080be03d	50	struct drm_device *drm_dev;
b73d1230	51	struct drm_crtc *crtc;
ce6cb556 SP	52	struct drm_encoder *encoder;
ce6cb556 SP	53	struct drm_connector connector;
f37cd5e8	54	struct exynos_drm_subdrv subdrv;
b73d1230 ID	55	struct vidi_win_data win_data[WINDOWS_NR];
	56	struct edid *raw_edid;
	57	unsigned int clkdiv;
	58	unsigned int default_win;
	59	unsigned long irq_flags;
	60	unsigned int connected;
	61	bool vblank_on;
	62	bool suspended;
291257cf	63	bool direct_vblank;
b73d1230 ID	64	struct work_struct work;
b73d1230 ID	65	struct mutex lock;
080be03d	66	int pipe;
b73d1230 ID	67	};
	68
	69	static const char fake_edid_info[] = {
	70	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
	71	0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
	72	0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
	73	0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	74	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
	75	0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
	76	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
	77	0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
	78	0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	79	0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
	80	0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
	81	0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
	82	0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
	83	0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
	84	0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
	85	0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
	86	0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
	87	0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
	88	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	89	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	90	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	91	0x00, 0x00, 0x00, 0x06
	92	};
	93
bb7704d6	94	static void vidi_apply(struct exynos_drm_manager *mgr)
b73d1230	95	{
bb7704d6	96	struct vidi_context *ctx = mgr->ctx;
b73d1230	97	struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
b73d1230 ID	98	struct vidi_win_data *win_data;
	99	int i;
	100
b73d1230 ID	101	for (i = 0; i < WINDOWS_NR; i++) {
b73d1230 ID	102	win_data = &ctx->win_data[i];
1c6244c3	103	if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
bb7704d6	104	mgr_ops->win_commit(mgr, i);
b73d1230 ID	105	}
	106
	107	if (mgr_ops && mgr_ops->commit)
bb7704d6	108	mgr_ops->commit(mgr);
b73d1230 ID	109	}
b73d1230 ID	110
bb7704d6	111	static void vidi_commit(struct exynos_drm_manager *mgr)
b73d1230	112	{
bb7704d6	113	struct vidi_context *ctx = mgr->ctx;
b73d1230	114
b73d1230 ID	115	if (ctx->suspended)
	116	return;
	117	}
	118
bb7704d6	119	static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
b73d1230	120	{
bb7704d6	121	struct vidi_context *ctx = mgr->ctx;
b73d1230	122
b73d1230 ID	123	if (ctx->suspended)
	124	return -EPERM;
	125
	126	if (!test_and_set_bit(0, &ctx->irq_flags))
	127	ctx->vblank_on = true;
	128
291257cf ID	129	ctx->direct_vblank = true;
	130
	131	/*
	132	* in case of page flip request, vidi_finish_pageflip function
	133	* will not be called because direct_vblank is true and then
1c6244c3	134	* that function will be called by manager_ops->win_commit callback
291257cf ID	135	*/
	136	schedule_work(&ctx->work);
	137
b73d1230 ID	138	return 0;
	139	}
	140
bb7704d6	141	static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
b73d1230	142	{
bb7704d6	143	struct vidi_context *ctx = mgr->ctx;
b73d1230	144
b73d1230 ID	145	if (ctx->suspended)
	146	return;
	147
	148	if (test_and_clear_bit(0, &ctx->irq_flags))
	149	ctx->vblank_on = false;
	150	}
	151
bb7704d6 SP	152	static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
bb7704d6 SP	153	struct exynos_drm_overlay *overlay)
b73d1230	154	{
bb7704d6	155	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	156	struct vidi_win_data *win_data;
	157	int win;
	158	unsigned long offset;
	159
b73d1230	160	if (!overlay) {
bb7704d6	161	DRM_ERROR("overlay is NULL\n");
b73d1230 ID	162	return;
	163	}
	164
	165	win = overlay->zpos;
	166	if (win == DEFAULT_ZPOS)
	167	win = ctx->default_win;
	168
a7f98d6a	169	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	170	return;
	171
	172	offset = overlay->fb_x * (overlay->bpp >> 3);
	173	offset += overlay->fb_y * overlay->pitch;
	174
	175	DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
	176
	177	win_data = &ctx->win_data[win];
	178
	179	win_data->offset_x = overlay->crtc_x;
	180	win_data->offset_y = overlay->crtc_y;
	181	win_data->ovl_width = overlay->crtc_width;
	182	win_data->ovl_height = overlay->crtc_height;
	183	win_data->fb_width = overlay->fb_width;
	184	win_data->fb_height = overlay->fb_height;
	185	win_data->dma_addr = overlay->dma_addr[0] + offset;
b73d1230 ID	186	win_data->bpp = overlay->bpp;
	187	win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
	188	(overlay->bpp >> 3);
	189	win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
	190
	191	/*
	192	* some parts of win_data should be transferred to user side
	193	* through specific ioctl.
	194	*/
	195
	196	DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
	197	win_data->offset_x, win_data->offset_y);
	198	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
	199	win_data->ovl_width, win_data->ovl_height);
ddd8e959	200	DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
b73d1230 ID	201	DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
	202	overlay->fb_width, overlay->crtc_width);
	203	}
	204
bb7704d6	205	static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
b73d1230	206	{
bb7704d6	207	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	208	struct vidi_win_data *win_data;
	209	int win = zpos;
	210
b73d1230 ID	211	if (ctx->suspended)
	212	return;
	213
	214	if (win == DEFAULT_ZPOS)
	215	win = ctx->default_win;
	216
a7f98d6a	217	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	218	return;
	219
	220	win_data = &ctx->win_data[win];
	221
	222	win_data->enabled = true;
	223
b8eade24	224	DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr);
b73d1230 ID	225
	226	if (ctx->vblank_on)
	227	schedule_work(&ctx->work);
	228	}
	229
bb7704d6	230	static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
b73d1230	231	{
bb7704d6	232	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	233	struct vidi_win_data *win_data;
	234	int win = zpos;
	235
b73d1230 ID	236	if (win == DEFAULT_ZPOS)
	237	win = ctx->default_win;
	238
a7f98d6a	239	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	240	return;
	241
	242	win_data = &ctx->win_data[win];
	243	win_data->enabled = false;
	244
	245	/* TODO. */
	246	}
	247
af65c804 SP	248	static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
	249	{
	250	struct vidi_context *ctx = mgr->ctx;
	251
	252	DRM_DEBUG_KMS("%s\n", __FILE__);
	253
	254	if (enable != false && enable != true)
	255	return -EINVAL;
	256
	257	if (enable) {
	258	ctx->suspended = false;
	259
	260	/* if vblank was enabled status, enable it again. */
	261	if (test_and_clear_bit(0, &ctx->irq_flags))
	262	vidi_enable_vblank(mgr);
	263
	264	vidi_apply(mgr);
	265	} else {
	266	ctx->suspended = true;
	267	}
	268
	269	return 0;
	270	}
	271
	272	static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
	273	{
	274	struct vidi_context *ctx = mgr->ctx;
	275
	276	DRM_DEBUG_KMS("%d\n", mode);
	277
	278	mutex_lock(&ctx->lock);
	279
	280	switch (mode) {
	281	case DRM_MODE_DPMS_ON:
	282	vidi_power_on(mgr, true);
	283	break;
	284	case DRM_MODE_DPMS_STANDBY:
	285	case DRM_MODE_DPMS_SUSPEND:
	286	case DRM_MODE_DPMS_OFF:
	287	vidi_power_on(mgr, false);
	288	break;
	289	default:
	290	DRM_DEBUG_KMS("unspecified mode %d\n", mode);
	291	break;
	292	}
	293
	294	mutex_unlock(&ctx->lock);
	295	}
	296
080be03d	297	static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
f37cd5e8	298	struct drm_device *drm_dev)
080be03d SP	299	{
080be03d SP	300	struct vidi_context *ctx = mgr->ctx;
f37cd5e8	301	struct exynos_drm_private *priv = drm_dev->dev_private;
080be03d	302
f37cd5e8 ID	303	mgr->drm_dev = ctx->drm_dev = drm_dev;
f37cd5e8 ID	304	mgr->pipe = ctx->pipe = priv->pipe++;
080be03d SP	305
	306	/*
	307	* enable drm irq mode.
	308	* - with irq_enabled = 1, we can use the vblank feature.
	309	*
	310	* P.S. note that we wouldn't use drm irq handler but
	311	* just specific driver own one instead because
	312	* drm framework supports only one irq handler.
	313	*/
	314	drm_dev->irq_enabled = 1;
	315
	316	/*
	317	* with vblank_disable_allowed = 1, vblank interrupt will be disabled
	318	* by drm timer once a current process gives up ownership of
	319	* vblank event.(after drm_vblank_put function is called)
	320	*/
	321	drm_dev->vblank_disable_allowed = 1;
	322
	323	return 0;
	324	}
	325
1c6244c3 SP	326	static struct exynos_drm_manager_ops vidi_manager_ops = {
1c6244c3 SP	327	.dpms = vidi_dpms,
1c6244c3 SP	328	.commit = vidi_commit,
	329	.enable_vblank = vidi_enable_vblank,
	330	.disable_vblank = vidi_disable_vblank,
	331	.win_mode_set = vidi_win_mode_set,
	332	.win_commit = vidi_win_commit,
	333	.win_disable = vidi_win_disable,
b73d1230 ID	334	};
b73d1230 ID	335
677e84c1	336	static struct exynos_drm_manager vidi_manager = {
080be03d SP	337	.type = EXYNOS_DISPLAY_TYPE_VIDI,
080be03d SP	338	.ops = &vidi_manager_ops,
677e84c1 JS	339	};
677e84c1 JS	340
b73d1230 ID	341	static void vidi_fake_vblank_handler(struct work_struct *work)
	342	{
	343	struct vidi_context *ctx = container_of(work, struct vidi_context,
	344	work);
b73d1230	345
080be03d	346	if (ctx->pipe < 0)
b73d1230 ID	347	return;
	348
	349	/* refresh rate is about 50Hz. */
	350	usleep_range(16000, 20000);
	351
291257cf ID	352	mutex_lock(&ctx->lock);
	353
	354	if (ctx->direct_vblank) {
080be03d	355	drm_handle_vblank(ctx->drm_dev, ctx->pipe);
291257cf ID	356	ctx->direct_vblank = false;
	357	mutex_unlock(&ctx->lock);
	358	return;
	359	}
	360
	361	mutex_unlock(&ctx->lock);
	362
080be03d	363	exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
b73d1230 ID	364	}
b73d1230 ID	365
b73d1230 ID	366	static int vidi_show_connection(struct device *dev,
	367	struct device_attribute attr, char buf)
	368	{
	369	int rc;
bb7704d6 SP	370	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
bb7704d6 SP	371	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	372
	373	mutex_lock(&ctx->lock);
	374
	375	rc = sprintf(buf, "%d\n", ctx->connected);
	376
	377	mutex_unlock(&ctx->lock);
	378
	379	return rc;
	380	}
	381
	382	static int vidi_store_connection(struct device *dev,
	383	struct device_attribute *attr,
	384	const char *buf, size_t len)
	385	{
bb7704d6 SP	386	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
bb7704d6 SP	387	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	388	int ret;
b73d1230 ID	389
b73d1230 ID	390	ret = kstrtoint(buf, 0, &ctx->connected);
	391	if (ret)
	392	return ret;
	393
	394	if (ctx->connected > 1)
	395	return -EINVAL;
	396
d07d39df ID	397	/* use fake edid data for test. */
	398	if (!ctx->raw_edid)
	399	ctx->raw_edid = (struct edid *)fake_edid_info;
	400
d7b8478a ID	401	/* if raw_edid isn't same as fake data then it can't be tested. */
	402	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	403	DRM_DEBUG_KMS("edid data is not fake data.\n");
	404	return -EINVAL;
	405	}
	406
b73d1230 ID	407	DRM_DEBUG_KMS("requested connection.\n");
b73d1230 ID	408
080be03d	409	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	410
	411	return len;
	412	}
	413
	414	static DEVICE_ATTR(connection, 0644, vidi_show_connection,
	415	vidi_store_connection);
	416
	417	int vidi_connection_ioctl(struct drm_device drm_dev, void data,
	418	struct drm_file *file_priv)
	419	{
	420	struct vidi_context *ctx = NULL;
	421	struct drm_encoder *encoder;
080be03d	422	struct exynos_drm_display *display;
b73d1230 ID	423	struct drm_exynos_vidi_connection *vidi = data;
b73d1230 ID	424
b73d1230 ID	425	if (!vidi) {
	426	DRM_DEBUG_KMS("user data for vidi is null.\n");
	427	return -EINVAL;
	428	}
	429
b73d1230 ID	430	if (vidi->connection > 1) {
	431	DRM_DEBUG_KMS("connection should be 0 or 1.\n");
	432	return -EINVAL;
	433	}
	434
	435	list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
	436	head) {
080be03d	437	display = exynos_drm_get_display(encoder);
b73d1230	438
080be03d SP	439	if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
080be03d SP	440	ctx = display->ctx;
b73d1230 ID	441	break;
	442	}
	443	}
	444
	445	if (!ctx) {
	446	DRM_DEBUG_KMS("not found virtual device type encoder.\n");
	447	return -EINVAL;
	448	}
	449
	450	if (ctx->connected == vidi->connection) {
	451	DRM_DEBUG_KMS("same connection request.\n");
	452	return -EINVAL;
	453	}
	454
d3b62dbf	455	if (vidi->connection) {
e7808df1 SWK	456	struct edid raw_edid = (struct edid )(uint32_t)vidi->edid;
	457	if (!drm_edid_is_valid(raw_edid)) {
	458	DRM_DEBUG_KMS("edid data is invalid.\n");
d3b62dbf ID	459	return -EINVAL;
d3b62dbf ID	460	}
4ddc773b	461	ctx->raw_edid = drm_edid_duplicate(raw_edid);
d3b62dbf ID	462	if (!ctx->raw_edid) {
	463	DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
	464	return -ENOMEM;
	465	}
d3b62dbf ID	466	} else {
	467	/*
	468	* with connection = 0, free raw_edid
	469	* only if raw edid data isn't same as fake data.
	470	*/
	471	if (ctx->raw_edid && ctx->raw_edid !=
	472	(struct edid *)fake_edid_info) {
	473	kfree(ctx->raw_edid);
	474	ctx->raw_edid = NULL;
	475	}
	476	}
b73d1230 ID	477
b73d1230 ID	478	ctx->connected = vidi->connection;
080be03d	479	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	480
	481	return 0;
	482	}
	483
ce6cb556 SP	484	static enum drm_connector_status vidi_detect(struct drm_connector *connector,
	485	bool force)
	486	{
	487	struct vidi_context *ctx = ctx_from_connector(connector);
	488
	489	/*
	490	* connection request would come from user side
	491	* to do hotplug through specific ioctl.
	492	*/
	493	return ctx->connected ? connector_status_connected :
	494	connector_status_disconnected;
	495	}
	496
	497	static void vidi_connector_destroy(struct drm_connector *connector)
	498	{
	499	}
	500
	501	static struct drm_connector_funcs vidi_connector_funcs = {
	502	.dpms = drm_helper_connector_dpms,
	503	.fill_modes = drm_helper_probe_single_connector_modes,
	504	.detect = vidi_detect,
	505	.destroy = vidi_connector_destroy,
	506	};
	507
	508	static int vidi_get_modes(struct drm_connector *connector)
	509	{
	510	struct vidi_context *ctx = ctx_from_connector(connector);
	511	struct edid *edid;
	512	int edid_len;
	513
	514	/*
	515	* the edid data comes from user side and it would be set
	516	* to ctx->raw_edid through specific ioctl.
	517	*/
	518	if (!ctx->raw_edid) {
	519	DRM_DEBUG_KMS("raw_edid is null.\n");
	520	return -EFAULT;
	521	}
	522
	523	edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
	524	edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
	525	if (!edid) {
	526	DRM_DEBUG_KMS("failed to allocate edid\n");
	527	return -ENOMEM;
	528	}
	529
	530	drm_mode_connector_update_edid_property(connector, edid);
	531
	532	return drm_add_edid_modes(connector, edid);
	533	}
	534
ce6cb556 SP	535	static struct drm_encoder vidi_best_encoder(struct drm_connector connector)
	536	{
	537	struct vidi_context *ctx = ctx_from_connector(connector);
	538
	539	return ctx->encoder;
	540	}
	541
	542	static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
	543	.get_modes = vidi_get_modes,
ce6cb556 SP	544	.best_encoder = vidi_best_encoder,
	545	};
	546
	547	static int vidi_create_connector(struct exynos_drm_display *display,
	548	struct drm_encoder *encoder)
	549	{
	550	struct vidi_context *ctx = display->ctx;
	551	struct drm_connector *connector = &ctx->connector;
	552	int ret;
	553
	554	ctx->encoder = encoder;
	555	connector->polled = DRM_CONNECTOR_POLL_HPD;
	556
	557	ret = drm_connector_init(ctx->drm_dev, connector,
	558	&vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
	559	if (ret) {
	560	DRM_ERROR("Failed to initialize connector with drm\n");
	561	return ret;
	562	}
	563
	564	drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
34ea3d38	565	drm_connector_register(connector);
ce6cb556 SP	566	drm_mode_connector_attach_encoder(connector, encoder);
	567
	568	return 0;
	569	}
	570
	571
	572	static struct exynos_drm_display_ops vidi_display_ops = {
	573	.create_connector = vidi_create_connector,
	574	};
	575
	576	static struct exynos_drm_display vidi_display = {
	577	.type = EXYNOS_DISPLAY_TYPE_VIDI,
	578	.ops = &vidi_display_ops,
	579	};
	580
f37cd5e8 ID	581	static int vidi_subdrv_probe(struct drm_device drm_dev, struct device dev)
	582	{
	583	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
	584	struct vidi_context *ctx = mgr->ctx;
	585	struct drm_crtc *crtc = ctx->crtc;
	586	int ret;
	587
	588	vidi_mgr_initialize(mgr, drm_dev);
	589
	590	ret = exynos_drm_crtc_create(&vidi_manager);
	591	if (ret) {
	592	DRM_ERROR("failed to create crtc.\n");
	593	return ret;
	594	}
	595
	596	ret = exynos_drm_create_enc_conn(drm_dev, &vidi_display);
	597	if (ret) {
	598	crtc->funcs->destroy(crtc);
	599	DRM_ERROR("failed to create encoder and connector.\n");
	600	return ret;
	601	}
	602
	603	return 0;
	604	}
	605
56550d94	606	static int vidi_probe(struct platform_device *pdev)
b73d1230	607	{
f37cd5e8	608	struct exynos_drm_subdrv *subdrv;
b73d1230	609	struct vidi_context *ctx;
b73d1230 ID	610	int ret;
b73d1230 ID	611
f37cd5e8	612	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
b73d1230 ID	613	if (!ctx)
	614	return -ENOMEM;
	615
	616	ctx->default_win = 0;
	617
	618	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
	619
bb7704d6	620	vidi_manager.ctx = ctx;
080be03d	621	vidi_display.ctx = ctx;
b73d1230 ID	622
	623	mutex_init(&ctx->lock);
	624
bb7704d6	625	platform_set_drvdata(pdev, &vidi_manager);
b73d1230	626
f37cd5e8 ID	627	subdrv = &ctx->subdrv;
	628	subdrv->dev = &pdev->dev;
	629	subdrv->probe = vidi_subdrv_probe;
b73d1230	630
f37cd5e8 ID	631	ret = exynos_drm_subdrv_register(subdrv);
	632	if (ret < 0) {
	633	dev_err(&pdev->dev, "failed to register drm vidi device\n");
	634	return ret;
	635	}
	636
	637	ret = device_create_file(&pdev->dev, &dev_attr_connection);
	638	if (ret < 0) {
	639	exynos_drm_subdrv_unregister(subdrv);
	640	DRM_INFO("failed to create connection sysfs.\n");
	641	}
b73d1230 ID	642
	643	return 0;
	644	}
	645
56550d94	646	static int vidi_remove(struct platform_device *pdev)
b73d1230	647	{
f37cd5e8 ID	648	struct exynos_drm_manager *mgr = platform_get_drvdata(pdev);
	649	struct vidi_context *ctx = mgr->ctx;
	650	struct drm_encoder *encoder = ctx->encoder;
	651	struct drm_crtc *crtc = mgr->crtc;
b73d1230	652
d3b62dbf ID	653	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	654	kfree(ctx->raw_edid);
	655	ctx->raw_edid = NULL;
f37cd5e8 ID	656
f37cd5e8 ID	657	return -EINVAL;
d3b62dbf ID	658	}
d3b62dbf ID	659
f37cd5e8 ID	660	crtc->funcs->destroy(crtc);
	661	encoder->funcs->destroy(encoder);
	662	drm_connector_cleanup(&ctx->connector);
	663
b73d1230 ID	664	return 0;
	665	}
	666
b73d1230 ID	667	struct platform_driver vidi_driver = {
b73d1230 ID	668	.probe = vidi_probe,
56550d94	669	.remove = vidi_remove,
b73d1230 ID	670	.driver = {
	671	.name = "exynos-drm-vidi",
	672	.owner = THIS_MODULE,
b73d1230 ID	673	},
b73d1230 ID	674	};
f37cd5e8 ID	675
	676	int exynos_drm_probe_vidi(void)
	677	{
	678	struct platform_device *pdev;
	679	int ret;
	680
	681	pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0);
	682	if (IS_ERR(pdev))
	683	return PTR_ERR(pdev);
	684
	685	ret = platform_driver_register(&vidi_driver);
	686	if (ret) {
	687	platform_device_unregister(pdev);
	688	return ret;
	689	}
	690
	691	return ret;
	692	}
	693
	694	void exynos_drm_remove_vidi(void)
	695	{
	696	struct vidi_context *ctx = vidi_manager.ctx;
	697	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
	698	struct platform_device *pdev = to_platform_device(subdrv->dev);
	699
	700	platform_driver_unregister(&vidi_driver);
	701	platform_device_unregister(pdev);
	702	}