[linux.git] / drivers / gpu / drm / exynos / exynos_drm_vidi.c

/* exynos_drm_vidi.c
 *
 * Copyright (C) 2012 Samsung Electronics Co.Ltd
 * Authors:
 *	Inki Dae <[email protected]>
 *
 * 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 <linux/component.h>

#include <drm/exynos_drm.h>

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

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

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

#define ctx_from_connector(c)	container_of(c, struct vidi_context, \
					connector)

struct vidi_context {
	struct exynos_drm_display	display;
	struct platform_device		*pdev;
	struct drm_device		*drm_dev;
	struct exynos_drm_crtc		*crtc;
	struct drm_encoder		*encoder;
	struct drm_connector		connector;
	struct exynos_drm_plane		planes[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 inline struct vidi_context *display_to_vidi(struct exynos_drm_display *d)
{
	return container_of(d, struct vidi_context, display);
}

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 int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
{
	struct vidi_context *ctx = crtc->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 crtc_ops->win_commit callback
	 */
	schedule_work(&ctx->work);

	return 0;
}

static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
{
	struct vidi_context *ctx = crtc->ctx;

	if (ctx->suspended)
		return;

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

static void vidi_win_commit(struct exynos_drm_crtc *crtc, unsigned int win)
{
	struct vidi_context *ctx = crtc->ctx;
	struct exynos_drm_plane *plane;

	if (ctx->suspended)
		return;

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

	plane = &ctx->planes[win];

	plane->enabled = true;

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

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

static void vidi_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
{
	struct vidi_context *ctx = crtc->ctx;
	struct exynos_drm_plane *plane;

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

	plane = &ctx->planes[win];
	plane->enabled = false;

	/* TODO. */
}

static int vidi_power_on(struct vidi_context *ctx, bool enable)
{
	struct exynos_drm_plane *plane;
	int i;

	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(ctx->crtc);

		for (i = 0; i < WINDOWS_NR; i++) {
			plane = &ctx->planes[i];
			if (plane->enabled)
				vidi_win_commit(ctx->crtc, i);
		}
	} else {
		ctx->suspended = true;
	}

	return 0;
}

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

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

	mutex_lock(&ctx->lock);

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

	mutex_unlock(&ctx->lock);
}

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

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

	return 0;
}

static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
	.dpms = vidi_dpms,
	.enable_vblank = vidi_enable_vblank,
	.disable_vblank = vidi_disable_vblank,
	.win_commit = vidi_win_commit,
	.win_disable = vidi_win_disable,
};

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)
{
	struct vidi_context *ctx = dev_get_drvdata(dev);
	int rc;

	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 vidi_context *ctx = dev_get_drvdata(dev);
	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_to_vidi(display);
			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,
	.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 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_to_vidi(display);
	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 int vidi_bind(struct device *dev, struct device *master, void *data)
{
	struct vidi_context *ctx = dev_get_drvdata(dev);
	struct drm_device *drm_dev = data;
	struct exynos_drm_plane *exynos_plane;
	enum drm_plane_type type;
	unsigned int zpos;
	int ret;

	vidi_ctx_initialize(ctx, drm_dev);

	for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
		type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
						DRM_PLANE_TYPE_OVERLAY;
		ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
					1 << ctx->pipe, type, zpos);
		if (ret)
			return ret;
	}

	exynos_plane = &ctx->planes[ctx->default_win];
	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
					   ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
					   &vidi_crtc_ops, ctx);
	if (IS_ERR(ctx->crtc)) {
		DRM_ERROR("failed to create crtc.\n");
		return PTR_ERR(ctx->crtc);
	}

	ret = exynos_drm_create_enc_conn(drm_dev, &ctx->display);
	if (ret) {
		ctx->crtc->base.funcs->destroy(&ctx->crtc->base);
		return ret;
	}

	return 0;
}


static void vidi_unbind(struct device *dev, struct device *master, void *data)
{
}

static const struct component_ops vidi_component_ops = {
	.bind	= vidi_bind,
	.unbind = vidi_unbind,
};

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

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

	ctx->display.type = EXYNOS_DISPLAY_TYPE_VIDI;
	ctx->display.ops = &vidi_display_ops;
	ctx->default_win = 0;
	ctx->pdev = pdev;

	ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC,
					EXYNOS_DISPLAY_TYPE_VIDI);
	if (ret)
		return ret;

	ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR,
					ctx->display.type);
	if (ret)
		goto err_del_crtc_component;

	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);

	mutex_init(&ctx->lock);

	platform_set_drvdata(pdev, ctx);

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

	ret = component_add(&pdev->dev, &vidi_component_ops);
	if (ret)
		goto err_remove_file;

	return ret;

err_remove_file:
	device_remove_file(&pdev->dev, &dev_attr_connection);
err_del_conn_component:
	exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR);
err_del_crtc_component:
	exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);

	return ret;
}

static int vidi_remove(struct platform_device *pdev)
{
	struct vidi_context *ctx = platform_get_drvdata(pdev);

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

		return -EINVAL;
	}

	component_del(&pdev->dev, &vidi_component_ops);
	exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR);
	exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);

	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;
}

static int exynos_drm_remove_vidi_device(struct device *dev, void *data)
{
	platform_device_unregister(to_platform_device(dev));

	return 0;
}

void exynos_drm_remove_vidi(void)
{
	int ret = driver_for_each_device(&vidi_driver.driver, NULL, NULL,
					 exynos_drm_remove_vidi_device);
	/* silence compiler warning */
	(void)ret;

	platform_driver_unregister(&vidi_driver);
}
Commit	Line	Data
b73d1230 ID	1	/* exynos_drm_vidi.c
	2	*
	3	* Copyright (C) 2012 Samsung Electronics Co.Ltd
	4	* Authors:
	5	* Inki Dae <[email protected]>
	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	16	#include <linux/platform_device.h>
1d50aa9c	17	#include <linux/component.h>
b73d1230 ID	18
	19	#include <drm/exynos_drm.h>
	20
760285e7 DH	21	#include <drm/drm_edid.h>
760285e7 DH	22	#include <drm/drm_crtc_helper.h>
4ea9526b	23	#include <drm/drm_atomic_helper.h>
b73d1230 ID	24
	25	#include "exynos_drm_drv.h"
	26	#include "exynos_drm_crtc.h"
7ee14cdc	27	#include "exynos_drm_plane.h"
b73d1230	28	#include "exynos_drm_encoder.h"
e30655d0	29	#include "exynos_drm_vidi.h"
b73d1230 ID	30
	31	/* vidi has totally three virtual windows. */
	32	#define WINDOWS_NR 3
	33
ce6cb556 SP	34	#define ctx_from_connector(c) container_of(c, struct vidi_context, \
ce6cb556 SP	35	connector)
b73d1230	36
b73d1230	37	struct vidi_context {
7340426a	38	struct exynos_drm_display display;
1d50aa9c	39	struct platform_device *pdev;
080be03d	40	struct drm_device *drm_dev;
93bca243	41	struct exynos_drm_crtc *crtc;
ce6cb556 SP	42	struct drm_encoder *encoder;
ce6cb556 SP	43	struct drm_connector connector;
7ee14cdc	44	struct exynos_drm_plane planes[WINDOWS_NR];
b73d1230 ID	45	struct edid *raw_edid;
	46	unsigned int clkdiv;
	47	unsigned int default_win;
	48	unsigned long irq_flags;
	49	unsigned int connected;
	50	bool vblank_on;
	51	bool suspended;
291257cf	52	bool direct_vblank;
b73d1230 ID	53	struct work_struct work;
b73d1230 ID	54	struct mutex lock;
080be03d	55	int pipe;
b73d1230 ID	56	};
b73d1230 ID	57
2f26bd72 AH	58	static inline struct vidi_context display_to_vidi(struct exynos_drm_display d)
	59	{
	60	return container_of(d, struct vidi_context, display);
	61	}
	62
b73d1230 ID	63	static const char fake_edid_info[] = {
	64	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
	65	0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
	66	0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
	67	0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	68	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
	69	0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
	70	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
	71	0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
	72	0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	73	0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
	74	0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
	75	0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
	76	0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
	77	0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
	78	0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
	79	0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
	80	0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
	81	0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
	82	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	83	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	84	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	85	0x00, 0x00, 0x00, 0x06
	86	};
	87
93bca243	88	static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
b73d1230	89	{
93bca243	90	struct vidi_context *ctx = crtc->ctx;
b73d1230	91
b73d1230 ID	92	if (ctx->suspended)
	93	return -EPERM;
	94
	95	if (!test_and_set_bit(0, &ctx->irq_flags))
	96	ctx->vblank_on = true;
	97
291257cf ID	98	ctx->direct_vblank = true;
	99
	100	/*
	101	* in case of page flip request, vidi_finish_pageflip function
	102	* will not be called because direct_vblank is true and then
93bca243	103	* that function will be called by crtc_ops->win_commit callback
291257cf ID	104	*/
	105	schedule_work(&ctx->work);
	106
b73d1230 ID	107	return 0;
	108	}
	109
93bca243	110	static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
b73d1230	111	{
93bca243	112	struct vidi_context *ctx = crtc->ctx;
b73d1230	113
b73d1230 ID	114	if (ctx->suspended)
	115	return;
	116
	117	if (test_and_clear_bit(0, &ctx->irq_flags))
	118	ctx->vblank_on = false;
	119	}
	120
6e2a3b66	121	static void vidi_win_commit(struct exynos_drm_crtc *crtc, unsigned int win)
b73d1230	122	{
93bca243	123	struct vidi_context *ctx = crtc->ctx;
7ee14cdc	124	struct exynos_drm_plane *plane;
b73d1230	125
b73d1230 ID	126	if (ctx->suspended)
	127	return;
	128
a7f98d6a	129	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	130	return;
b73d1230 ID	131
7ee14cdc	132	plane = &ctx->planes[win];
b73d1230	133
7ee14cdc	134	plane->enabled = true;
b73d1230	135
7ee14cdc	136	DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr);
b73d1230 ID	137
	138	if (ctx->vblank_on)
	139	schedule_work(&ctx->work);
	140	}
	141
6e2a3b66	142	static void vidi_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
b73d1230	143	{
93bca243	144	struct vidi_context *ctx = crtc->ctx;
7ee14cdc	145	struct exynos_drm_plane *plane;
b73d1230	146
a7f98d6a	147	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	148	return;
b73d1230 ID	149
7ee14cdc GP	150	plane = &ctx->planes[win];
7ee14cdc GP	151	plane->enabled = false;
b73d1230 ID	152
	153	/* TODO. */
	154	}
	155
92dc7a04	156	static int vidi_power_on(struct vidi_context *ctx, bool enable)
af65c804	157	{
7ee14cdc GP	158	struct exynos_drm_plane *plane;
	159	int i;
	160
af65c804 SP	161	DRM_DEBUG_KMS("%s\n", __FILE__);
	162
	163	if (enable != false && enable != true)
	164	return -EINVAL;
	165
	166	if (enable) {
	167	ctx->suspended = false;
	168
	169	/* if vblank was enabled status, enable it again. */
	170	if (test_and_clear_bit(0, &ctx->irq_flags))
92dc7a04	171	vidi_enable_vblank(ctx->crtc);
af65c804	172
7ee14cdc GP	173	for (i = 0; i < WINDOWS_NR; i++) {
	174	plane = &ctx->planes[i];
	175	if (plane->enabled)
	176	vidi_win_commit(ctx->crtc, i);
	177	}
af65c804 SP	178	} else {
	179	ctx->suspended = true;
	180	}
	181
	182	return 0;
	183	}
	184
93bca243	185	static void vidi_dpms(struct exynos_drm_crtc *crtc, int mode)
af65c804	186	{
93bca243	187	struct vidi_context *ctx = crtc->ctx;
af65c804 SP	188
	189	DRM_DEBUG_KMS("%d\n", mode);
	190
	191	mutex_lock(&ctx->lock);
	192
	193	switch (mode) {
	194	case DRM_MODE_DPMS_ON:
92dc7a04	195	vidi_power_on(ctx, true);
af65c804 SP	196	break;
	197	case DRM_MODE_DPMS_STANDBY:
	198	case DRM_MODE_DPMS_SUSPEND:
	199	case DRM_MODE_DPMS_OFF:
92dc7a04	200	vidi_power_on(ctx, false);
af65c804 SP	201	break;
	202	default:
	203	DRM_DEBUG_KMS("unspecified mode %d\n", mode);
	204	break;
	205	}
	206
	207	mutex_unlock(&ctx->lock);
	208	}
	209
93bca243	210	static int vidi_ctx_initialize(struct vidi_context *ctx,
f37cd5e8	211	struct drm_device *drm_dev)
080be03d	212	{
f37cd5e8	213	struct exynos_drm_private *priv = drm_dev->dev_private;
080be03d	214
eb88e422	215	ctx->drm_dev = drm_dev;
8a326edd	216	ctx->pipe = priv->pipe++;
080be03d	217
080be03d SP	218	return 0;
	219	}
	220
f3aaf762	221	static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
1c6244c3	222	.dpms = vidi_dpms,
1c6244c3 SP	223	.enable_vblank = vidi_enable_vblank,
1c6244c3 SP	224	.disable_vblank = vidi_disable_vblank,
1c6244c3 SP	225	.win_commit = vidi_win_commit,
1c6244c3 SP	226	.win_disable = vidi_win_disable,
b73d1230 ID	227	};
b73d1230 ID	228
b73d1230 ID	229	static void vidi_fake_vblank_handler(struct work_struct *work)
	230	{
	231	struct vidi_context *ctx = container_of(work, struct vidi_context,
	232	work);
b73d1230	233
080be03d	234	if (ctx->pipe < 0)
b73d1230 ID	235	return;
	236
	237	/* refresh rate is about 50Hz. */
	238	usleep_range(16000, 20000);
	239
291257cf ID	240	mutex_lock(&ctx->lock);
	241
	242	if (ctx->direct_vblank) {
080be03d	243	drm_handle_vblank(ctx->drm_dev, ctx->pipe);
291257cf ID	244	ctx->direct_vblank = false;
	245	mutex_unlock(&ctx->lock);
	246	return;
	247	}
	248
	249	mutex_unlock(&ctx->lock);
	250
080be03d	251	exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
b73d1230 ID	252	}
b73d1230 ID	253
b73d1230 ID	254	static int vidi_show_connection(struct device *dev,
	255	struct device_attribute attr, char buf)
	256	{
f01833cd	257	struct vidi_context *ctx = dev_get_drvdata(dev);
b73d1230	258	int rc;
b73d1230 ID	259
	260	mutex_lock(&ctx->lock);
	261
	262	rc = sprintf(buf, "%d\n", ctx->connected);
	263
	264	mutex_unlock(&ctx->lock);
	265
	266	return rc;
	267	}
	268
	269	static int vidi_store_connection(struct device *dev,
	270	struct device_attribute *attr,
	271	const char *buf, size_t len)
	272	{
f01833cd	273	struct vidi_context *ctx = dev_get_drvdata(dev);
b73d1230 ID	274	int ret;
b73d1230 ID	275
b73d1230 ID	276	ret = kstrtoint(buf, 0, &ctx->connected);
	277	if (ret)
	278	return ret;
	279
	280	if (ctx->connected > 1)
	281	return -EINVAL;
	282
d07d39df ID	283	/* use fake edid data for test. */
	284	if (!ctx->raw_edid)
	285	ctx->raw_edid = (struct edid *)fake_edid_info;
	286
d7b8478a ID	287	/* if raw_edid isn't same as fake data then it can't be tested. */
	288	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	289	DRM_DEBUG_KMS("edid data is not fake data.\n");
	290	return -EINVAL;
	291	}
	292
b73d1230 ID	293	DRM_DEBUG_KMS("requested connection.\n");
b73d1230 ID	294
080be03d	295	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	296
	297	return len;
	298	}
	299
	300	static DEVICE_ATTR(connection, 0644, vidi_show_connection,
	301	vidi_store_connection);
	302
	303	int vidi_connection_ioctl(struct drm_device drm_dev, void data,
	304	struct drm_file *file_priv)
	305	{
	306	struct vidi_context *ctx = NULL;
	307	struct drm_encoder *encoder;
080be03d	308	struct exynos_drm_display *display;
b73d1230 ID	309	struct drm_exynos_vidi_connection *vidi = data;
b73d1230 ID	310
b73d1230 ID	311	if (!vidi) {
	312	DRM_DEBUG_KMS("user data for vidi is null.\n");
	313	return -EINVAL;
	314	}
	315
b73d1230 ID	316	if (vidi->connection > 1) {
	317	DRM_DEBUG_KMS("connection should be 0 or 1.\n");
	318	return -EINVAL;
	319	}
	320
	321	list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
	322	head) {
080be03d	323	display = exynos_drm_get_display(encoder);
b73d1230	324
080be03d	325	if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
2f26bd72	326	ctx = display_to_vidi(display);
b73d1230 ID	327	break;
	328	}
	329	}
	330
	331	if (!ctx) {
	332	DRM_DEBUG_KMS("not found virtual device type encoder.\n");
	333	return -EINVAL;
	334	}
	335
	336	if (ctx->connected == vidi->connection) {
	337	DRM_DEBUG_KMS("same connection request.\n");
	338	return -EINVAL;
	339	}
	340
d3b62dbf	341	if (vidi->connection) {
e7808df1 SWK	342	struct edid raw_edid = (struct edid )(uint32_t)vidi->edid;
	343	if (!drm_edid_is_valid(raw_edid)) {
	344	DRM_DEBUG_KMS("edid data is invalid.\n");
d3b62dbf ID	345	return -EINVAL;
d3b62dbf ID	346	}
4ddc773b	347	ctx->raw_edid = drm_edid_duplicate(raw_edid);
d3b62dbf ID	348	if (!ctx->raw_edid) {
	349	DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
	350	return -ENOMEM;
	351	}
d3b62dbf ID	352	} else {
	353	/*
	354	* with connection = 0, free raw_edid
	355	* only if raw edid data isn't same as fake data.
	356	*/
	357	if (ctx->raw_edid && ctx->raw_edid !=
	358	(struct edid *)fake_edid_info) {
	359	kfree(ctx->raw_edid);
	360	ctx->raw_edid = NULL;
	361	}
	362	}
b73d1230 ID	363
b73d1230 ID	364	ctx->connected = vidi->connection;
080be03d	365	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	366
	367	return 0;
	368	}
	369
ce6cb556 SP	370	static enum drm_connector_status vidi_detect(struct drm_connector *connector,
	371	bool force)
	372	{
	373	struct vidi_context *ctx = ctx_from_connector(connector);
	374
	375	/*
	376	* connection request would come from user side
	377	* to do hotplug through specific ioctl.
	378	*/
	379	return ctx->connected ? connector_status_connected :
	380	connector_status_disconnected;
	381	}
	382
	383	static void vidi_connector_destroy(struct drm_connector *connector)
	384	{
	385	}
	386
	387	static struct drm_connector_funcs vidi_connector_funcs = {
	388	.dpms = drm_helper_connector_dpms,
	389	.fill_modes = drm_helper_probe_single_connector_modes,
	390	.detect = vidi_detect,
	391	.destroy = vidi_connector_destroy,
4ea9526b GP	392	.reset = drm_atomic_helper_connector_reset,
	393	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	394	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
ce6cb556 SP	395	};
	396
	397	static int vidi_get_modes(struct drm_connector *connector)
	398	{
	399	struct vidi_context *ctx = ctx_from_connector(connector);
	400	struct edid *edid;
	401	int edid_len;
	402
	403	/*
	404	* the edid data comes from user side and it would be set
	405	* to ctx->raw_edid through specific ioctl.
	406	*/
	407	if (!ctx->raw_edid) {
	408	DRM_DEBUG_KMS("raw_edid is null.\n");
	409	return -EFAULT;
	410	}
	411
	412	edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
	413	edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
	414	if (!edid) {
	415	DRM_DEBUG_KMS("failed to allocate edid\n");
	416	return -ENOMEM;
	417	}
	418
	419	drm_mode_connector_update_edid_property(connector, edid);
	420
	421	return drm_add_edid_modes(connector, edid);
	422	}
	423
ce6cb556 SP	424	static struct drm_encoder vidi_best_encoder(struct drm_connector connector)
	425	{
	426	struct vidi_context *ctx = ctx_from_connector(connector);
	427
	428	return ctx->encoder;
	429	}
	430
	431	static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
	432	.get_modes = vidi_get_modes,
ce6cb556 SP	433	.best_encoder = vidi_best_encoder,
	434	};
	435
	436	static int vidi_create_connector(struct exynos_drm_display *display,
	437	struct drm_encoder *encoder)
	438	{
2f26bd72	439	struct vidi_context *ctx = display_to_vidi(display);
ce6cb556 SP	440	struct drm_connector *connector = &ctx->connector;
	441	int ret;
	442
	443	ctx->encoder = encoder;
	444	connector->polled = DRM_CONNECTOR_POLL_HPD;
	445
	446	ret = drm_connector_init(ctx->drm_dev, connector,
	447	&vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
	448	if (ret) {
	449	DRM_ERROR("Failed to initialize connector with drm\n");
	450	return ret;
	451	}
	452
	453	drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
34ea3d38	454	drm_connector_register(connector);
ce6cb556 SP	455	drm_mode_connector_attach_encoder(connector, encoder);
	456
	457	return 0;
	458	}
	459
	460
	461	static struct exynos_drm_display_ops vidi_display_ops = {
	462	.create_connector = vidi_create_connector,
	463	};
	464
1d50aa9c	465	static int vidi_bind(struct device dev, struct device master, void *data)
f37cd5e8	466	{
f01833cd	467	struct vidi_context *ctx = dev_get_drvdata(dev);
1d50aa9c	468	struct drm_device *drm_dev = data;
7ee14cdc GP	469	struct exynos_drm_plane *exynos_plane;
7ee14cdc GP	470	enum drm_plane_type type;
6e2a3b66 GP	471	unsigned int zpos;
6e2a3b66 GP	472	int ret;
f37cd5e8	473
0f04cf8d JS	474	vidi_ctx_initialize(ctx, drm_dev);
0f04cf8d JS	475
7ee14cdc GP	476	for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
	477	type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
	478	DRM_PLANE_TYPE_OVERLAY;
	479	ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
6e2a3b66	480	1 << ctx->pipe, type, zpos);
7ee14cdc GP	481	if (ret)
	482	return ret;
	483	}
	484
	485	exynos_plane = &ctx->planes[ctx->default_win];
	486	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
	487	ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
93bca243 GP	488	&vidi_crtc_ops, ctx);
93bca243 GP	489	if (IS_ERR(ctx->crtc)) {
f37cd5e8	490	DRM_ERROR("failed to create crtc.\n");
93bca243	491	return PTR_ERR(ctx->crtc);
f37cd5e8 ID	492	}
f37cd5e8 ID	493
7340426a	494	ret = exynos_drm_create_enc_conn(drm_dev, &ctx->display);
f37cd5e8	495	if (ret) {
93bca243	496	ctx->crtc->base.funcs->destroy(&ctx->crtc->base);
f37cd5e8 ID	497	return ret;
	498	}
	499
	500	return 0;
	501	}
	502
1d50aa9c ID	503
	504	static void vidi_unbind(struct device dev, struct device master, void *data)
	505	{
	506	}
	507
	508	static const struct component_ops vidi_component_ops = {
	509	.bind = vidi_bind,
	510	.unbind = vidi_unbind,
	511	};
	512
56550d94	513	static int vidi_probe(struct platform_device *pdev)
b73d1230	514	{
b73d1230	515	struct vidi_context *ctx;
b73d1230 ID	516	int ret;
b73d1230 ID	517
f37cd5e8	518	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
b73d1230 ID	519	if (!ctx)
	520	return -ENOMEM;
	521
7340426a AH	522	ctx->display.type = EXYNOS_DISPLAY_TYPE_VIDI;
7340426a AH	523	ctx->display.ops = &vidi_display_ops;
b73d1230	524	ctx->default_win = 0;
1d50aa9c ID	525	ctx->pdev = pdev;
	526
	527	ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC,
5d1741ad	528	EXYNOS_DISPLAY_TYPE_VIDI);
1d50aa9c ID	529	if (ret)
	530	return ret;
	531
	532	ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR,
	533	ctx->display.type);
	534	if (ret)
	535	goto err_del_crtc_component;
b73d1230 ID	536
	537	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
	538
b73d1230 ID	539	mutex_init(&ctx->lock);
b73d1230 ID	540
f01833cd	541	platform_set_drvdata(pdev, ctx);
b73d1230	542
f37cd5e8 ID	543	ret = device_create_file(&pdev->dev, &dev_attr_connection);
f37cd5e8 ID	544	if (ret < 0) {
1d50aa9c ID	545	DRM_ERROR("failed to create connection sysfs.\n");
1d50aa9c ID	546	goto err_del_conn_component;
f37cd5e8	547	}
b73d1230	548
1d50aa9c ID	549	ret = component_add(&pdev->dev, &vidi_component_ops);
	550	if (ret)
	551	goto err_remove_file;
	552
	553	return ret;
	554
	555	err_remove_file:
	556	device_remove_file(&pdev->dev, &dev_attr_connection);
	557	err_del_conn_component:
	558	exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR);
	559	err_del_crtc_component:
	560	exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);
	561
	562	return ret;
b73d1230 ID	563	}
b73d1230 ID	564
56550d94	565	static int vidi_remove(struct platform_device *pdev)
b73d1230	566	{
f01833cd	567	struct vidi_context *ctx = platform_get_drvdata(pdev);
b73d1230	568
d3b62dbf ID	569	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	570	kfree(ctx->raw_edid);
	571	ctx->raw_edid = NULL;
f37cd5e8 ID	572
f37cd5e8 ID	573	return -EINVAL;
d3b62dbf ID	574	}
d3b62dbf ID	575
1d50aa9c ID	576	component_del(&pdev->dev, &vidi_component_ops);
	577	exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR);
	578	exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC);
	579
b73d1230 ID	580	return 0;
	581	}
	582
b73d1230 ID	583	struct platform_driver vidi_driver = {
b73d1230 ID	584	.probe = vidi_probe,
56550d94	585	.remove = vidi_remove,
b73d1230 ID	586	.driver = {
	587	.name = "exynos-drm-vidi",
	588	.owner = THIS_MODULE,
b73d1230 ID	589	},
b73d1230 ID	590	};
f37cd5e8 ID	591
	592	int exynos_drm_probe_vidi(void)
	593	{
	594	struct platform_device *pdev;
	595	int ret;
	596
	597	pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0);
	598	if (IS_ERR(pdev))
	599	return PTR_ERR(pdev);
	600
	601	ret = platform_driver_register(&vidi_driver);
	602	if (ret) {
	603	platform_device_unregister(pdev);
	604	return ret;
	605	}
	606
	607	return ret;
	608	}
	609
f01833cd AH	610	static int exynos_drm_remove_vidi_device(struct device dev, void data)
	611	{
	612	platform_device_unregister(to_platform_device(dev));
	613
	614	return 0;
	615	}
	616
f37cd5e8 ID	617	void exynos_drm_remove_vidi(void)
f37cd5e8 ID	618	{
f01833cd AH	619	int ret = driver_for_each_device(&vidi_driver.driver, NULL, NULL,
	620	exynos_drm_remove_vidi_device);
	621	/* silence compiler warning */
	622	(void)ret;
f37cd5e8 ID	623
f37cd5e8 ID	624	platform_driver_unregister(&vidi_driver);
f37cd5e8	625	}