[mirror_ubuntu-artful-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 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 = 0x%x\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, int pipe)
{
	struct vidi_context *ctx = mgr->ctx;

	DRM_ERROR("vidi initialize ct=%p dev=%p pipe=%d\n", ctx, drm_dev, pipe);

	ctx->drm_dev = drm_dev;
	ctx->pipe = 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 = {
	.initialize = vidi_mgr_initialize,
	.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 int vidi_mode_valid(struct drm_connector *connector,
			struct drm_display_mode *mode)
{
	return MODE_OK;
}

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,
	.mode_valid = vidi_mode_valid,
	.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_sysfs_connector_add(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_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct vidi_context *ctx;
	int ret;

	ctx = devm_kzalloc(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);

	ret = device_create_file(dev, &dev_attr_connection);
	if (ret < 0)
		DRM_INFO("failed to create connection sysfs.\n");

	exynos_drm_manager_register(&vidi_manager);
	exynos_drm_display_register(&vidi_display);

	return 0;
}

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

	exynos_drm_display_unregister(&vidi_display);
	exynos_drm_manager_unregister(&vidi_manager);

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

	return 0;
}

struct platform_driver vidi_driver = {
	.probe		= vidi_probe,
	.remove		= vidi_remove,
	.driver		= {
		.name	= "exynos-drm-vidi",
		.owner	= THIS_MODULE,
	},
};
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;
b73d1230 ID	54	struct vidi_win_data win_data[WINDOWS_NR];
	55	struct edid *raw_edid;
	56	unsigned int clkdiv;
	57	unsigned int default_win;
	58	unsigned long irq_flags;
	59	unsigned int connected;
	60	bool vblank_on;
	61	bool suspended;
291257cf	62	bool direct_vblank;
b73d1230 ID	63	struct work_struct work;
b73d1230 ID	64	struct mutex lock;
080be03d	65	int pipe;
b73d1230 ID	66	};
	67
	68	static const char fake_edid_info[] = {
	69	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
	70	0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
	71	0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
	72	0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	73	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
	74	0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
	75	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
	76	0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
	77	0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	78	0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
	79	0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
	80	0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
	81	0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
	82	0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
	83	0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
	84	0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
	85	0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
	86	0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
	87	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 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, 0x06
	91	};
	92
bb7704d6	93	static void vidi_apply(struct exynos_drm_manager *mgr)
b73d1230	94	{
bb7704d6	95	struct vidi_context *ctx = mgr->ctx;
b73d1230	96	struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
b73d1230 ID	97	struct vidi_win_data *win_data;
	98	int i;
	99
b73d1230 ID	100	for (i = 0; i < WINDOWS_NR; i++) {
b73d1230 ID	101	win_data = &ctx->win_data[i];
1c6244c3	102	if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
bb7704d6	103	mgr_ops->win_commit(mgr, i);
b73d1230 ID	104	}
	105
	106	if (mgr_ops && mgr_ops->commit)
bb7704d6	107	mgr_ops->commit(mgr);
b73d1230 ID	108	}
b73d1230 ID	109
bb7704d6	110	static void vidi_commit(struct exynos_drm_manager *mgr)
b73d1230	111	{
bb7704d6	112	struct vidi_context *ctx = mgr->ctx;
b73d1230	113
b73d1230 ID	114	if (ctx->suspended)
	115	return;
	116	}
	117
bb7704d6	118	static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
b73d1230	119	{
bb7704d6	120	struct vidi_context *ctx = mgr->ctx;
b73d1230	121
b73d1230 ID	122	if (ctx->suspended)
	123	return -EPERM;
	124
	125	if (!test_and_set_bit(0, &ctx->irq_flags))
	126	ctx->vblank_on = true;
	127
291257cf ID	128	ctx->direct_vblank = true;
	129
	130	/*
	131	* in case of page flip request, vidi_finish_pageflip function
	132	* will not be called because direct_vblank is true and then
1c6244c3	133	* that function will be called by manager_ops->win_commit callback
291257cf ID	134	*/
	135	schedule_work(&ctx->work);
	136
b73d1230 ID	137	return 0;
	138	}
	139
bb7704d6	140	static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
b73d1230	141	{
bb7704d6	142	struct vidi_context *ctx = mgr->ctx;
b73d1230	143
b73d1230 ID	144	if (ctx->suspended)
	145	return;
	146
	147	if (test_and_clear_bit(0, &ctx->irq_flags))
	148	ctx->vblank_on = false;
	149	}
	150
bb7704d6 SP	151	static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
bb7704d6 SP	152	struct exynos_drm_overlay *overlay)
b73d1230	153	{
bb7704d6	154	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	155	struct vidi_win_data *win_data;
	156	int win;
	157	unsigned long offset;
	158
b73d1230	159	if (!overlay) {
bb7704d6	160	DRM_ERROR("overlay is NULL\n");
b73d1230 ID	161	return;
	162	}
	163
	164	win = overlay->zpos;
	165	if (win == DEFAULT_ZPOS)
	166	win = ctx->default_win;
	167
a7f98d6a	168	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	169	return;
	170
	171	offset = overlay->fb_x * (overlay->bpp >> 3);
	172	offset += overlay->fb_y * overlay->pitch;
	173
	174	DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
	175
	176	win_data = &ctx->win_data[win];
	177
	178	win_data->offset_x = overlay->crtc_x;
	179	win_data->offset_y = overlay->crtc_y;
	180	win_data->ovl_width = overlay->crtc_width;
	181	win_data->ovl_height = overlay->crtc_height;
	182	win_data->fb_width = overlay->fb_width;
	183	win_data->fb_height = overlay->fb_height;
	184	win_data->dma_addr = overlay->dma_addr[0] + offset;
b73d1230 ID	185	win_data->bpp = overlay->bpp;
	186	win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
	187	(overlay->bpp >> 3);
	188	win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
	189
	190	/*
	191	* some parts of win_data should be transferred to user side
	192	* through specific ioctl.
	193	*/
	194
	195	DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
	196	win_data->offset_x, win_data->offset_y);
	197	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
	198	win_data->ovl_width, win_data->ovl_height);
ddd8e959	199	DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
b73d1230 ID	200	DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
	201	overlay->fb_width, overlay->crtc_width);
	202	}
	203
bb7704d6	204	static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
b73d1230	205	{
bb7704d6	206	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	207	struct vidi_win_data *win_data;
	208	int win = zpos;
	209
b73d1230 ID	210	if (ctx->suspended)
	211	return;
	212
	213	if (win == DEFAULT_ZPOS)
	214	win = ctx->default_win;
	215
a7f98d6a	216	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	217	return;
	218
	219	win_data = &ctx->win_data[win];
	220
	221	win_data->enabled = true;
	222
	223	DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
	224
	225	if (ctx->vblank_on)
	226	schedule_work(&ctx->work);
	227	}
	228
bb7704d6	229	static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
b73d1230	230	{
bb7704d6	231	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	232	struct vidi_win_data *win_data;
	233	int win = zpos;
	234
b73d1230 ID	235	if (win == DEFAULT_ZPOS)
	236	win = ctx->default_win;
	237
a7f98d6a	238	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	239	return;
	240
	241	win_data = &ctx->win_data[win];
	242	win_data->enabled = false;
	243
	244	/* TODO. */
	245	}
	246
af65c804 SP	247	static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
	248	{
	249	struct vidi_context *ctx = mgr->ctx;
	250
	251	DRM_DEBUG_KMS("%s\n", __FILE__);
	252
	253	if (enable != false && enable != true)
	254	return -EINVAL;
	255
	256	if (enable) {
	257	ctx->suspended = false;
	258
	259	/* if vblank was enabled status, enable it again. */
	260	if (test_and_clear_bit(0, &ctx->irq_flags))
	261	vidi_enable_vblank(mgr);
	262
	263	vidi_apply(mgr);
	264	} else {
	265	ctx->suspended = true;
	266	}
	267
	268	return 0;
	269	}
	270
	271	static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
	272	{
	273	struct vidi_context *ctx = mgr->ctx;
	274
	275	DRM_DEBUG_KMS("%d\n", mode);
	276
	277	mutex_lock(&ctx->lock);
	278
	279	switch (mode) {
	280	case DRM_MODE_DPMS_ON:
	281	vidi_power_on(mgr, true);
	282	break;
	283	case DRM_MODE_DPMS_STANDBY:
	284	case DRM_MODE_DPMS_SUSPEND:
	285	case DRM_MODE_DPMS_OFF:
	286	vidi_power_on(mgr, false);
	287	break;
	288	default:
	289	DRM_DEBUG_KMS("unspecified mode %d\n", mode);
	290	break;
	291	}
	292
	293	mutex_unlock(&ctx->lock);
	294	}
	295
080be03d SP	296	static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
	297	struct drm_device *drm_dev, int pipe)
	298	{
	299	struct vidi_context *ctx = mgr->ctx;
	300
	301	DRM_ERROR("vidi initialize ct=%p dev=%p pipe=%d\n", ctx, drm_dev, pipe);
	302
	303	ctx->drm_dev = drm_dev;
	304	ctx->pipe = pipe;
	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	326	static struct exynos_drm_manager_ops vidi_manager_ops = {
080be03d	327	.initialize = vidi_mgr_initialize,
1c6244c3	328	.dpms = vidi_dpms,
1c6244c3 SP	329	.commit = vidi_commit,
	330	.enable_vblank = vidi_enable_vblank,
	331	.disable_vblank = vidi_disable_vblank,
	332	.win_mode_set = vidi_win_mode_set,
	333	.win_commit = vidi_win_commit,
	334	.win_disable = vidi_win_disable,
b73d1230 ID	335	};
b73d1230 ID	336
677e84c1	337	static struct exynos_drm_manager vidi_manager = {
080be03d SP	338	.type = EXYNOS_DISPLAY_TYPE_VIDI,
080be03d SP	339	.ops = &vidi_manager_ops,
677e84c1 JS	340	};
677e84c1 JS	341
b73d1230 ID	342	static void vidi_fake_vblank_handler(struct work_struct *work)
	343	{
	344	struct vidi_context *ctx = container_of(work, struct vidi_context,
	345	work);
b73d1230	346
080be03d	347	if (ctx->pipe < 0)
b73d1230 ID	348	return;
	349
	350	/* refresh rate is about 50Hz. */
	351	usleep_range(16000, 20000);
	352
291257cf ID	353	mutex_lock(&ctx->lock);
	354
	355	if (ctx->direct_vblank) {
080be03d	356	drm_handle_vblank(ctx->drm_dev, ctx->pipe);
291257cf ID	357	ctx->direct_vblank = false;
	358	mutex_unlock(&ctx->lock);
	359	return;
	360	}
	361
	362	mutex_unlock(&ctx->lock);
	363
080be03d	364	exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
b73d1230 ID	365	}
b73d1230 ID	366
b73d1230 ID	367	static int vidi_show_connection(struct device *dev,
	368	struct device_attribute attr, char buf)
	369	{
	370	int rc;
bb7704d6 SP	371	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
bb7704d6 SP	372	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	373
	374	mutex_lock(&ctx->lock);
	375
	376	rc = sprintf(buf, "%d\n", ctx->connected);
	377
	378	mutex_unlock(&ctx->lock);
	379
	380	return rc;
	381	}
	382
	383	static int vidi_store_connection(struct device *dev,
	384	struct device_attribute *attr,
	385	const char *buf, size_t len)
	386	{
bb7704d6 SP	387	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
bb7704d6 SP	388	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	389	int ret;
b73d1230 ID	390
b73d1230 ID	391	ret = kstrtoint(buf, 0, &ctx->connected);
	392	if (ret)
	393	return ret;
	394
	395	if (ctx->connected > 1)
	396	return -EINVAL;
	397
d07d39df ID	398	/* use fake edid data for test. */
	399	if (!ctx->raw_edid)
	400	ctx->raw_edid = (struct edid *)fake_edid_info;
	401
d7b8478a ID	402	/* if raw_edid isn't same as fake data then it can't be tested. */
	403	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	404	DRM_DEBUG_KMS("edid data is not fake data.\n");
	405	return -EINVAL;
	406	}
	407
b73d1230 ID	408	DRM_DEBUG_KMS("requested connection.\n");
b73d1230 ID	409
080be03d	410	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	411
	412	return len;
	413	}
	414
	415	static DEVICE_ATTR(connection, 0644, vidi_show_connection,
	416	vidi_store_connection);
	417
	418	int vidi_connection_ioctl(struct drm_device drm_dev, void data,
	419	struct drm_file *file_priv)
	420	{
	421	struct vidi_context *ctx = NULL;
	422	struct drm_encoder *encoder;
080be03d	423	struct exynos_drm_display *display;
b73d1230 ID	424	struct drm_exynos_vidi_connection *vidi = data;
b73d1230 ID	425
b73d1230 ID	426	if (!vidi) {
	427	DRM_DEBUG_KMS("user data for vidi is null.\n");
	428	return -EINVAL;
	429	}
	430
b73d1230 ID	431	if (vidi->connection > 1) {
	432	DRM_DEBUG_KMS("connection should be 0 or 1.\n");
	433	return -EINVAL;
	434	}
	435
	436	list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
	437	head) {
080be03d	438	display = exynos_drm_get_display(encoder);
b73d1230	439
080be03d SP	440	if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
080be03d SP	441	ctx = display->ctx;
b73d1230 ID	442	break;
	443	}
	444	}
	445
	446	if (!ctx) {
	447	DRM_DEBUG_KMS("not found virtual device type encoder.\n");
	448	return -EINVAL;
	449	}
	450
	451	if (ctx->connected == vidi->connection) {
	452	DRM_DEBUG_KMS("same connection request.\n");
	453	return -EINVAL;
	454	}
	455
d3b62dbf	456	if (vidi->connection) {
e7808df1 SWK	457	struct edid raw_edid = (struct edid )(uint32_t)vidi->edid;
	458	if (!drm_edid_is_valid(raw_edid)) {
	459	DRM_DEBUG_KMS("edid data is invalid.\n");
d3b62dbf ID	460	return -EINVAL;
d3b62dbf ID	461	}
4ddc773b	462	ctx->raw_edid = drm_edid_duplicate(raw_edid);
d3b62dbf ID	463	if (!ctx->raw_edid) {
	464	DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
	465	return -ENOMEM;
	466	}
d3b62dbf ID	467	} else {
	468	/*
	469	* with connection = 0, free raw_edid
	470	* only if raw edid data isn't same as fake data.
	471	*/
	472	if (ctx->raw_edid && ctx->raw_edid !=
	473	(struct edid *)fake_edid_info) {
	474	kfree(ctx->raw_edid);
	475	ctx->raw_edid = NULL;
	476	}
	477	}
b73d1230 ID	478
b73d1230 ID	479	ctx->connected = vidi->connection;
080be03d	480	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	481
	482	return 0;
	483	}
	484
ce6cb556 SP	485	static enum drm_connector_status vidi_detect(struct drm_connector *connector,
	486	bool force)
	487	{
	488	struct vidi_context *ctx = ctx_from_connector(connector);
	489
	490	/*
	491	* connection request would come from user side
	492	* to do hotplug through specific ioctl.
	493	*/
	494	return ctx->connected ? connector_status_connected :
	495	connector_status_disconnected;
	496	}
	497
	498	static void vidi_connector_destroy(struct drm_connector *connector)
	499	{
	500	}
	501
	502	static struct drm_connector_funcs vidi_connector_funcs = {
	503	.dpms = drm_helper_connector_dpms,
	504	.fill_modes = drm_helper_probe_single_connector_modes,
	505	.detect = vidi_detect,
	506	.destroy = vidi_connector_destroy,
	507	};
	508
	509	static int vidi_get_modes(struct drm_connector *connector)
	510	{
	511	struct vidi_context *ctx = ctx_from_connector(connector);
	512	struct edid *edid;
	513	int edid_len;
	514
	515	/*
	516	* the edid data comes from user side and it would be set
	517	* to ctx->raw_edid through specific ioctl.
	518	*/
	519	if (!ctx->raw_edid) {
	520	DRM_DEBUG_KMS("raw_edid is null.\n");
	521	return -EFAULT;
	522	}
	523
	524	edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
	525	edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
	526	if (!edid) {
	527	DRM_DEBUG_KMS("failed to allocate edid\n");
	528	return -ENOMEM;
	529	}
	530
	531	drm_mode_connector_update_edid_property(connector, edid);
	532
	533	return drm_add_edid_modes(connector, edid);
	534	}
	535
	536	static int vidi_mode_valid(struct drm_connector *connector,
	537	struct drm_display_mode *mode)
	538	{
	539	return MODE_OK;
	540	}
	541
	542	static struct drm_encoder vidi_best_encoder(struct drm_connector connector)
	543	{
	544	struct vidi_context *ctx = ctx_from_connector(connector);
	545
	546	return ctx->encoder;
	547	}
	548
549	static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
550	.get_modes = vidi_get_modes,
551	.mode_valid = vidi_mode_valid,
552	.best_encoder = vidi_best_encoder,
553	};
554
555	static int vidi_create_connector(struct exynos_drm_display *display,
556	struct drm_encoder *encoder)
557	{
558	struct vidi_context *ctx = display->ctx;
559	struct drm_connector *connector = &ctx->connector;
560	int ret;
561
562	ctx->encoder = encoder;
563	connector->polled = DRM_CONNECTOR_POLL_HPD;
564
565	ret = drm_connector_init(ctx->drm_dev, connector,
566	&vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
567	if (ret) {
568	DRM_ERROR("Failed to initialize connector with drm\n");
569	return ret;
570	}
571
572	drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
573	drm_sysfs_connector_add(connector);
574	drm_mode_connector_attach_encoder(connector, encoder);
575
576	return 0;
577	}
578
579
580	static struct exynos_drm_display_ops vidi_display_ops = {
581	.create_connector = vidi_create_connector,
582	};
583
584	static struct exynos_drm_display vidi_display = {
585	.type = EXYNOS_DISPLAY_TYPE_VIDI,
586	.ops = &vidi_display_ops,
587	};
588
56550d94	589	static int vidi_probe(struct platform_device *pdev)
b73d1230 ID	590	{
	591	struct device *dev = &pdev->dev;
	592	struct vidi_context *ctx;
b73d1230 ID	593	int ret;
b73d1230 ID	594
d873ab99	595	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
b73d1230 ID	596	if (!ctx)
	597	return -ENOMEM;
	598
	599	ctx->default_win = 0;
	600
	601	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
	602
bb7704d6	603	vidi_manager.ctx = ctx;
080be03d	604	vidi_display.ctx = ctx;
b73d1230 ID	605
	606	mutex_init(&ctx->lock);
	607
bb7704d6	608	platform_set_drvdata(pdev, &vidi_manager);
b73d1230	609
d873ab99	610	ret = device_create_file(dev, &dev_attr_connection);
b73d1230 ID	611	if (ret < 0)
	612	DRM_INFO("failed to create connection sysfs.\n");
	613
080be03d SP	614	exynos_drm_manager_register(&vidi_manager);
080be03d SP	615	exynos_drm_display_register(&vidi_display);
b73d1230 ID	616
	617	return 0;
	618	}
	619
56550d94	620	static int vidi_remove(struct platform_device *pdev)
b73d1230 ID	621	{
	622	struct vidi_context *ctx = platform_get_drvdata(pdev);
	623
080be03d SP	624	exynos_drm_display_unregister(&vidi_display);
080be03d SP	625	exynos_drm_manager_unregister(&vidi_manager);
b73d1230	626
d3b62dbf ID	627	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	628	kfree(ctx->raw_edid);
	629	ctx->raw_edid = NULL;
	630	}
	631
b73d1230 ID	632	return 0;
	633	}
	634
b73d1230 ID	635	struct platform_driver vidi_driver = {
b73d1230 ID	636	.probe = vidi_probe,
56550d94	637	.remove = vidi_remove,
b73d1230 ID	638	.driver = {
	639	.name = "exynos-drm-vidi",
	640	.owner = THIS_MODULE,
b73d1230 ID	641	},
b73d1230 ID	642	};