[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))

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 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 bool vidi_display_is_connected(struct exynos_drm_display *display)
{
	struct vidi_context *ctx = display->ctx;

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

static struct edid *vidi_get_edid(struct exynos_drm_display *display,
			struct drm_connector *connector)
{
	struct vidi_context *ctx = display->ctx;
	struct edid *edid;

	/*
	 * 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 ERR_PTR(-EFAULT);
	}

	edid = drm_edid_duplicate(ctx->raw_edid);
	if (!edid) {
		DRM_DEBUG_KMS("failed to allocate edid\n");
		return ERR_PTR(-ENOMEM);
	}

	return edid;
}

static int vidi_check_mode(struct exynos_drm_display *display,
			struct drm_display_mode *mode)
{
	/* TODO. */

	return 0;
}

static struct exynos_drm_display_ops vidi_display_ops = {
	.is_connected = vidi_display_is_connected,
	.get_edid = vidi_get_edid,
	.check_mode = vidi_check_mode,
};

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

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 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))
b73d1230 ID	32
	33	struct vidi_win_data {
	34	unsigned int offset_x;
	35	unsigned int offset_y;
	36	unsigned int ovl_width;
	37	unsigned int ovl_height;
	38	unsigned int fb_width;
	39	unsigned int fb_height;
	40	unsigned int bpp;
	41	dma_addr_t dma_addr;
b73d1230 ID	42	unsigned int buf_offsize;
	43	unsigned int line_size; /* bytes */
	44	bool enabled;
	45	};
	46
	47	struct vidi_context {
080be03d	48	struct drm_device *drm_dev;
b73d1230 ID	49	struct drm_crtc *crtc;
	50	struct vidi_win_data win_data[WINDOWS_NR];
	51	struct edid *raw_edid;
	52	unsigned int clkdiv;
	53	unsigned int default_win;
	54	unsigned long irq_flags;
	55	unsigned int connected;
	56	bool vblank_on;
	57	bool suspended;
291257cf	58	bool direct_vblank;
b73d1230 ID	59	struct work_struct work;
b73d1230 ID	60	struct mutex lock;
080be03d	61	int pipe;
b73d1230 ID	62	};
	63
	64	static const char fake_edid_info[] = {
	65	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
	66	0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
	67	0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
	68	0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	69	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
	70	0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
	71	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
	72	0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
	73	0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	74	0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
	75	0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
	76	0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
	77	0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
	78	0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
	79	0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
	80	0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
	81	0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
	82	0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 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, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	86	0x00, 0x00, 0x00, 0x06
	87	};
	88
080be03d	89	static bool vidi_display_is_connected(struct exynos_drm_display *display)
b73d1230	90	{
080be03d	91	struct vidi_context *ctx = display->ctx;
b73d1230	92
b73d1230 ID	93	/*
	94	* connection request would come from user side
	95	* to do hotplug through specific ioctl.
	96	*/
	97	return ctx->connected ? true : false;
	98	}
	99
080be03d	100	static struct edid vidi_get_edid(struct exynos_drm_display display,
9c08e4ba	101	struct drm_connector *connector)
b73d1230	102	{
080be03d	103	struct vidi_context *ctx = display->ctx;
9c08e4ba	104	struct edid *edid;
b73d1230	105
b73d1230 ID	106	/*
	107	* the edid data comes from user side and it would be set
	108	* to ctx->raw_edid through specific ioctl.
	109	*/
	110	if (!ctx->raw_edid) {
	111	DRM_DEBUG_KMS("raw_edid is null.\n");
9c08e4ba	112	return ERR_PTR(-EFAULT);
b73d1230 ID	113	}
b73d1230 ID	114
4ddc773b	115	edid = drm_edid_duplicate(ctx->raw_edid);
9c08e4ba RS	116	if (!edid) {
	117	DRM_DEBUG_KMS("failed to allocate edid\n");
	118	return ERR_PTR(-ENOMEM);
	119	}
b73d1230	120
9c08e4ba	121	return edid;
b73d1230 ID	122	}
b73d1230 ID	123
080be03d SP	124	static int vidi_check_mode(struct exynos_drm_display *display,
080be03d SP	125	struct drm_display_mode *mode)
b73d1230	126	{
b73d1230 ID	127	/* TODO. */
	128
	129	return 0;
	130	}
	131
b73d1230	132	static struct exynos_drm_display_ops vidi_display_ops = {
b73d1230 ID	133	.is_connected = vidi_display_is_connected,
b73d1230 ID	134	.get_edid = vidi_get_edid,
16844fb1	135	.check_mode = vidi_check_mode,
b73d1230 ID	136	};
b73d1230 ID	137
080be03d SP	138	static struct exynos_drm_display vidi_display = {
	139	.type = EXYNOS_DISPLAY_TYPE_VIDI,
	140	.ops = &vidi_display_ops,
	141	};
	142
bb7704d6	143	static void vidi_apply(struct exynos_drm_manager *mgr)
b73d1230	144	{
bb7704d6	145	struct vidi_context *ctx = mgr->ctx;
b73d1230	146	struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
b73d1230 ID	147	struct vidi_win_data *win_data;
	148	int i;
	149
b73d1230 ID	150	for (i = 0; i < WINDOWS_NR; i++) {
b73d1230 ID	151	win_data = &ctx->win_data[i];
1c6244c3	152	if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
bb7704d6	153	mgr_ops->win_commit(mgr, i);
b73d1230 ID	154	}
	155
	156	if (mgr_ops && mgr_ops->commit)
bb7704d6	157	mgr_ops->commit(mgr);
b73d1230 ID	158	}
b73d1230 ID	159
bb7704d6	160	static void vidi_commit(struct exynos_drm_manager *mgr)
b73d1230	161	{
bb7704d6	162	struct vidi_context *ctx = mgr->ctx;
b73d1230	163
b73d1230 ID	164	if (ctx->suspended)
	165	return;
	166	}
	167
bb7704d6	168	static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
b73d1230	169	{
bb7704d6	170	struct vidi_context *ctx = mgr->ctx;
b73d1230	171
b73d1230 ID	172	if (ctx->suspended)
	173	return -EPERM;
	174
	175	if (!test_and_set_bit(0, &ctx->irq_flags))
	176	ctx->vblank_on = true;
	177
291257cf ID	178	ctx->direct_vblank = true;
	179
	180	/*
	181	* in case of page flip request, vidi_finish_pageflip function
	182	* will not be called because direct_vblank is true and then
1c6244c3	183	* that function will be called by manager_ops->win_commit callback
291257cf ID	184	*/
	185	schedule_work(&ctx->work);
	186
b73d1230 ID	187	return 0;
	188	}
	189
bb7704d6	190	static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
b73d1230	191	{
bb7704d6	192	struct vidi_context *ctx = mgr->ctx;
b73d1230	193
b73d1230 ID	194	if (ctx->suspended)
	195	return;
	196
	197	if (test_and_clear_bit(0, &ctx->irq_flags))
	198	ctx->vblank_on = false;
	199	}
	200
bb7704d6 SP	201	static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
bb7704d6 SP	202	struct exynos_drm_overlay *overlay)
b73d1230	203	{
bb7704d6	204	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	205	struct vidi_win_data *win_data;
	206	int win;
	207	unsigned long offset;
	208
b73d1230	209	if (!overlay) {
bb7704d6	210	DRM_ERROR("overlay is NULL\n");
b73d1230 ID	211	return;
	212	}
	213
	214	win = overlay->zpos;
	215	if (win == DEFAULT_ZPOS)
	216	win = ctx->default_win;
	217
a7f98d6a	218	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	219	return;
	220
	221	offset = overlay->fb_x * (overlay->bpp >> 3);
	222	offset += overlay->fb_y * overlay->pitch;
	223
	224	DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
	225
	226	win_data = &ctx->win_data[win];
	227
	228	win_data->offset_x = overlay->crtc_x;
	229	win_data->offset_y = overlay->crtc_y;
	230	win_data->ovl_width = overlay->crtc_width;
	231	win_data->ovl_height = overlay->crtc_height;
	232	win_data->fb_width = overlay->fb_width;
	233	win_data->fb_height = overlay->fb_height;
	234	win_data->dma_addr = overlay->dma_addr[0] + offset;
b73d1230 ID	235	win_data->bpp = overlay->bpp;
	236	win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
	237	(overlay->bpp >> 3);
	238	win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
	239
	240	/*
	241	* some parts of win_data should be transferred to user side
	242	* through specific ioctl.
	243	*/
	244
	245	DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
	246	win_data->offset_x, win_data->offset_y);
	247	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
	248	win_data->ovl_width, win_data->ovl_height);
ddd8e959	249	DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
b73d1230 ID	250	DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
	251	overlay->fb_width, overlay->crtc_width);
	252	}
	253
bb7704d6	254	static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
b73d1230	255	{
bb7704d6	256	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	257	struct vidi_win_data *win_data;
	258	int win = zpos;
	259
b73d1230 ID	260	if (ctx->suspended)
	261	return;
	262
	263	if (win == DEFAULT_ZPOS)
	264	win = ctx->default_win;
	265
a7f98d6a	266	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	267	return;
	268
	269	win_data = &ctx->win_data[win];
	270
	271	win_data->enabled = true;
	272
	273	DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
	274
	275	if (ctx->vblank_on)
	276	schedule_work(&ctx->work);
	277	}
	278
bb7704d6	279	static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
b73d1230	280	{
bb7704d6	281	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	282	struct vidi_win_data *win_data;
	283	int win = zpos;
	284
b73d1230 ID	285	if (win == DEFAULT_ZPOS)
	286	win = ctx->default_win;
	287
a7f98d6a	288	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	289	return;
	290
	291	win_data = &ctx->win_data[win];
	292	win_data->enabled = false;
	293
	294	/* TODO. */
	295	}
	296
af65c804 SP	297	static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
	298	{
	299	struct vidi_context *ctx = mgr->ctx;
	300
	301	DRM_DEBUG_KMS("%s\n", __FILE__);
	302
	303	if (enable != false && enable != true)
	304	return -EINVAL;
	305
	306	if (enable) {
	307	ctx->suspended = false;
	308
	309	/* if vblank was enabled status, enable it again. */
	310	if (test_and_clear_bit(0, &ctx->irq_flags))
	311	vidi_enable_vblank(mgr);
	312
	313	vidi_apply(mgr);
	314	} else {
	315	ctx->suspended = true;
	316	}
	317
	318	return 0;
	319	}
	320
	321	static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
	322	{
	323	struct vidi_context *ctx = mgr->ctx;
	324
	325	DRM_DEBUG_KMS("%d\n", mode);
	326
	327	mutex_lock(&ctx->lock);
	328
	329	switch (mode) {
	330	case DRM_MODE_DPMS_ON:
	331	vidi_power_on(mgr, true);
	332	break;
	333	case DRM_MODE_DPMS_STANDBY:
	334	case DRM_MODE_DPMS_SUSPEND:
	335	case DRM_MODE_DPMS_OFF:
	336	vidi_power_on(mgr, false);
	337	break;
	338	default:
	339	DRM_DEBUG_KMS("unspecified mode %d\n", mode);
	340	break;
	341	}
	342
	343	mutex_unlock(&ctx->lock);
	344	}
	345
080be03d SP	346	static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
	347	struct drm_device *drm_dev, int pipe)
	348	{
	349	struct vidi_context *ctx = mgr->ctx;
	350
	351	DRM_ERROR("vidi initialize ct=%p dev=%p pipe=%d\n", ctx, drm_dev, pipe);
	352
	353	ctx->drm_dev = drm_dev;
	354	ctx->pipe = pipe;
	355
	356	/*
	357	* enable drm irq mode.
	358	* - with irq_enabled = 1, we can use the vblank feature.
	359	*
	360	* P.S. note that we wouldn't use drm irq handler but
	361	* just specific driver own one instead because
	362	* drm framework supports only one irq handler.
	363	*/
	364	drm_dev->irq_enabled = 1;
	365
	366	/*
	367	* with vblank_disable_allowed = 1, vblank interrupt will be disabled
	368	* by drm timer once a current process gives up ownership of
	369	* vblank event.(after drm_vblank_put function is called)
	370	*/
	371	drm_dev->vblank_disable_allowed = 1;
	372
	373	return 0;
	374	}
	375
1c6244c3	376	static struct exynos_drm_manager_ops vidi_manager_ops = {
080be03d	377	.initialize = vidi_mgr_initialize,
1c6244c3	378	.dpms = vidi_dpms,
1c6244c3 SP	379	.commit = vidi_commit,
	380	.enable_vblank = vidi_enable_vblank,
	381	.disable_vblank = vidi_disable_vblank,
	382	.win_mode_set = vidi_win_mode_set,
	383	.win_commit = vidi_win_commit,
	384	.win_disable = vidi_win_disable,
b73d1230 ID	385	};
b73d1230 ID	386
677e84c1	387	static struct exynos_drm_manager vidi_manager = {
080be03d SP	388	.type = EXYNOS_DISPLAY_TYPE_VIDI,
080be03d SP	389	.ops = &vidi_manager_ops,
677e84c1 JS	390	};
677e84c1 JS	391
b73d1230 ID	392	static void vidi_fake_vblank_handler(struct work_struct *work)
	393	{
	394	struct vidi_context *ctx = container_of(work, struct vidi_context,
	395	work);
b73d1230	396
080be03d	397	if (ctx->pipe < 0)
b73d1230 ID	398	return;
	399
	400	/* refresh rate is about 50Hz. */
	401	usleep_range(16000, 20000);
	402
291257cf ID	403	mutex_lock(&ctx->lock);
	404
	405	if (ctx->direct_vblank) {
080be03d	406	drm_handle_vblank(ctx->drm_dev, ctx->pipe);
291257cf ID	407	ctx->direct_vblank = false;
	408	mutex_unlock(&ctx->lock);
	409	return;
	410	}
	411
	412	mutex_unlock(&ctx->lock);
	413
080be03d	414	exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
b73d1230 ID	415	}
b73d1230 ID	416
b73d1230 ID	417	static int vidi_show_connection(struct device *dev,
	418	struct device_attribute attr, char buf)
	419	{
	420	int rc;
bb7704d6 SP	421	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
bb7704d6 SP	422	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	423
	424	mutex_lock(&ctx->lock);
	425
	426	rc = sprintf(buf, "%d\n", ctx->connected);
	427
	428	mutex_unlock(&ctx->lock);
	429
	430	return rc;
	431	}
	432
	433	static int vidi_store_connection(struct device *dev,
	434	struct device_attribute *attr,
	435	const char *buf, size_t len)
	436	{
bb7704d6 SP	437	struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
bb7704d6 SP	438	struct vidi_context *ctx = mgr->ctx;
b73d1230 ID	439	int ret;
b73d1230 ID	440
b73d1230 ID	441	ret = kstrtoint(buf, 0, &ctx->connected);
	442	if (ret)
	443	return ret;
	444
	445	if (ctx->connected > 1)
	446	return -EINVAL;
	447
d07d39df ID	448	/* use fake edid data for test. */
	449	if (!ctx->raw_edid)
	450	ctx->raw_edid = (struct edid *)fake_edid_info;
	451
d7b8478a ID	452	/* if raw_edid isn't same as fake data then it can't be tested. */
	453	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	454	DRM_DEBUG_KMS("edid data is not fake data.\n");
	455	return -EINVAL;
	456	}
	457
b73d1230 ID	458	DRM_DEBUG_KMS("requested connection.\n");
b73d1230 ID	459
080be03d	460	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	461
	462	return len;
	463	}
	464
	465	static DEVICE_ATTR(connection, 0644, vidi_show_connection,
	466	vidi_store_connection);
	467
	468	int vidi_connection_ioctl(struct drm_device drm_dev, void data,
	469	struct drm_file *file_priv)
	470	{
	471	struct vidi_context *ctx = NULL;
	472	struct drm_encoder *encoder;
080be03d	473	struct exynos_drm_display *display;
b73d1230 ID	474	struct drm_exynos_vidi_connection *vidi = data;
b73d1230 ID	475
b73d1230 ID	476	if (!vidi) {
	477	DRM_DEBUG_KMS("user data for vidi is null.\n");
	478	return -EINVAL;
	479	}
	480
b73d1230 ID	481	if (vidi->connection > 1) {
	482	DRM_DEBUG_KMS("connection should be 0 or 1.\n");
	483	return -EINVAL;
	484	}
	485
	486	list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
	487	head) {
080be03d	488	display = exynos_drm_get_display(encoder);
b73d1230	489
080be03d SP	490	if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
080be03d SP	491	ctx = display->ctx;
b73d1230 ID	492	break;
	493	}
	494	}
	495
	496	if (!ctx) {
	497	DRM_DEBUG_KMS("not found virtual device type encoder.\n");
	498	return -EINVAL;
	499	}
	500
	501	if (ctx->connected == vidi->connection) {
	502	DRM_DEBUG_KMS("same connection request.\n");
	503	return -EINVAL;
	504	}
	505
d3b62dbf	506	if (vidi->connection) {
e7808df1 SWK	507	struct edid raw_edid = (struct edid )(uint32_t)vidi->edid;
	508	if (!drm_edid_is_valid(raw_edid)) {
	509	DRM_DEBUG_KMS("edid data is invalid.\n");
d3b62dbf ID	510	return -EINVAL;
d3b62dbf ID	511	}
4ddc773b	512	ctx->raw_edid = drm_edid_duplicate(raw_edid);
d3b62dbf ID	513	if (!ctx->raw_edid) {
	514	DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
	515	return -ENOMEM;
	516	}
d3b62dbf ID	517	} else {
	518	/*
	519	* with connection = 0, free raw_edid
	520	* only if raw edid data isn't same as fake data.
	521	*/
	522	if (ctx->raw_edid && ctx->raw_edid !=
	523	(struct edid *)fake_edid_info) {
	524	kfree(ctx->raw_edid);
	525	ctx->raw_edid = NULL;
	526	}
	527	}
b73d1230 ID	528
b73d1230 ID	529	ctx->connected = vidi->connection;
080be03d	530	drm_helper_hpd_irq_event(ctx->drm_dev);
b73d1230 ID	531
	532	return 0;
	533	}
	534
56550d94	535	static int vidi_probe(struct platform_device *pdev)
b73d1230 ID	536	{
	537	struct device *dev = &pdev->dev;
	538	struct vidi_context *ctx;
b73d1230 ID	539	int ret;
b73d1230 ID	540
d873ab99	541	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
b73d1230 ID	542	if (!ctx)
	543	return -ENOMEM;
	544
	545	ctx->default_win = 0;
	546
	547	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
	548
bb7704d6	549	vidi_manager.ctx = ctx;
080be03d	550	vidi_display.ctx = ctx;
b73d1230 ID	551
	552	mutex_init(&ctx->lock);
	553
bb7704d6	554	platform_set_drvdata(pdev, &vidi_manager);
b73d1230	555
d873ab99	556	ret = device_create_file(dev, &dev_attr_connection);
b73d1230 ID	557	if (ret < 0)
	558	DRM_INFO("failed to create connection sysfs.\n");
	559
080be03d SP	560	exynos_drm_manager_register(&vidi_manager);
080be03d SP	561	exynos_drm_display_register(&vidi_display);
b73d1230 ID	562
	563	return 0;
	564	}
	565
56550d94	566	static int vidi_remove(struct platform_device *pdev)
b73d1230 ID	567	{
	568	struct vidi_context *ctx = platform_get_drvdata(pdev);
	569
080be03d SP	570	exynos_drm_display_unregister(&vidi_display);
080be03d SP	571	exynos_drm_manager_unregister(&vidi_manager);
b73d1230	572
d3b62dbf ID	573	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	574	kfree(ctx->raw_edid);
	575	ctx->raw_edid = NULL;
	576	}
	577
b73d1230 ID	578	return 0;
	579	}
	580
b73d1230 ID	581	struct platform_driver vidi_driver = {
b73d1230 ID	582	.probe = vidi_probe,
56550d94	583	.remove = vidi_remove,
b73d1230 ID	584	.driver = {
	585	.name = "exynos-drm-vidi",
	586	.owner = THIS_MODULE,
b73d1230 ID	587	},
b73d1230 ID	588	};