[mirror_ubuntu-bionic-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_context(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 exynos_drm_subdrv	subdrv;
	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;
};

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 device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	/*
	 * 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 device *dev,
			struct drm_connector *connector)
{
	struct vidi_context *ctx = get_vidi_context(dev);
	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 void *vidi_get_panel(struct device *dev)
{
	/* TODO. */

	return NULL;
}

static int vidi_check_mode(struct device *dev, struct drm_display_mode *mode)
{
	/* TODO. */

	return 0;
}

static int vidi_display_power_on(struct device *dev, int mode)
{
	/* TODO */

	return 0;
}

static struct exynos_drm_display_ops vidi_display_ops = {
	.type = EXYNOS_DISPLAY_TYPE_VIDI,
	.is_connected = vidi_display_is_connected,
	.get_edid = vidi_get_edid,
	.get_panel = vidi_get_panel,
	.check_mode = vidi_check_mode,
	.power_on = vidi_display_power_on,
};

static void vidi_dpms(struct device *subdrv_dev, int mode)
{
	struct vidi_context *ctx = get_vidi_context(subdrv_dev);

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

	mutex_lock(&ctx->lock);

	switch (mode) {
	case DRM_MODE_DPMS_ON:
		/* TODO. */
		break;
	case DRM_MODE_DPMS_STANDBY:
	case DRM_MODE_DPMS_SUSPEND:
	case DRM_MODE_DPMS_OFF:
		/* TODO. */
		break;
	default:
		DRM_DEBUG_KMS("unspecified mode %d\n", mode);
		break;
	}

	mutex_unlock(&ctx->lock);
}

static void vidi_apply(struct device *subdrv_dev)
{
	struct vidi_context *ctx = get_vidi_context(subdrv_dev);
	struct exynos_drm_manager *mgr = ctx->subdrv.manager;
	struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
	struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_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 && (ovl_ops && ovl_ops->commit))
			ovl_ops->commit(subdrv_dev, i);
	}

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

static void vidi_commit(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	if (ctx->suspended)
		return;
}

static int vidi_enable_vblank(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	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 overlay_ops->commit callback
	 */
	schedule_work(&ctx->work);

	return 0;
}

static void vidi_disable_vblank(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	if (ctx->suspended)
		return;

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

static struct exynos_drm_manager_ops vidi_manager_ops = {
	.dpms = vidi_dpms,
	.apply = vidi_apply,
	.commit = vidi_commit,
	.enable_vblank = vidi_enable_vblank,
	.disable_vblank = vidi_disable_vblank,
};

static void vidi_win_mode_set(struct device *dev,
			      struct exynos_drm_overlay *overlay)
{
	struct vidi_context *ctx = get_vidi_context(dev);
	struct vidi_win_data *win_data;
	int win;
	unsigned long offset;

	if (!overlay) {
		dev_err(dev, "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 device *dev, int zpos)
{
	struct vidi_context *ctx = get_vidi_context(dev);
	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 device *dev, int zpos)
{
	struct vidi_context *ctx = get_vidi_context(dev);
	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 struct exynos_drm_overlay_ops vidi_overlay_ops = {
	.mode_set = vidi_win_mode_set,
	.commit = vidi_win_commit,
	.disable = vidi_win_disable,
};

static struct exynos_drm_manager vidi_manager = {
	.pipe		= -1,
	.ops		= &vidi_manager_ops,
	.overlay_ops	= &vidi_overlay_ops,
	.display_ops	= &vidi_display_ops,
};

static void vidi_fake_vblank_handler(struct work_struct *work)
{
	struct vidi_context *ctx = container_of(work, struct vidi_context,
					work);
	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
	struct exynos_drm_manager *manager = subdrv->manager;

	if (manager->pipe < 0)
		return;

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

	mutex_lock(&ctx->lock);

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

	mutex_unlock(&ctx->lock);

	exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe);
}

static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
{
	/*
	 * enable drm irq mode.
	 * - with irq_enabled = true, 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 = true;

	/*
	 * with vblank_disable_allowed = true, 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 = true;

	return 0;
}

static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
{
	/* TODO. */
}

static int vidi_power_on(struct vidi_context *ctx, bool enable)
{
	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
	struct device *dev = subdrv->dev;

	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(dev);

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

	return 0;
}

static int vidi_show_connection(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	int rc;
	struct vidi_context *ctx = get_vidi_context(dev);

	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 = get_vidi_context(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->subdrv.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_manager *manager;
	struct exynos_drm_display_ops *display_ops;
	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) {
		manager = exynos_drm_get_manager(encoder);
		display_ops = manager->display_ops;

		if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
			ctx = get_vidi_context(manager->dev);
			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->subdrv.drm_dev);

	return 0;
}

static int vidi_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct vidi_context *ctx;
	struct exynos_drm_subdrv *subdrv;
	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);

	subdrv = &ctx->subdrv;
	subdrv->dev = dev;
	subdrv->manager = &vidi_manager;
	subdrv->probe = vidi_subdrv_probe;
	subdrv->remove = vidi_subdrv_remove;

	mutex_init(&ctx->lock);

	platform_set_drvdata(pdev, ctx);

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

	exynos_drm_subdrv_register(subdrv);

	return 0;
}

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

	exynos_drm_subdrv_unregister(&ctx->subdrv);

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

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int vidi_suspend(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	return vidi_power_on(ctx, false);
}

static int vidi_resume(struct device *dev)
{
	struct vidi_context *ctx = get_vidi_context(dev);

	return vidi_power_on(ctx, true);
}
#endif

static const struct dev_pm_ops vidi_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
};

struct platform_driver vidi_driver = {
	.probe		= vidi_probe,
	.remove		= vidi_remove,
	.driver		= {
		.name	= "exynos-drm-vidi",
		.owner	= THIS_MODULE,
		.pm	= &vidi_pm_ops,
	},
};
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
	31	#define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev))
	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 {
	48	struct exynos_drm_subdrv subdrv;
	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;
	60	struct mutex lock;
	61	};
	62
	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
b73d1230 ID	88	static bool vidi_display_is_connected(struct device *dev)
	89	{
	90	struct vidi_context *ctx = get_vidi_context(dev);
	91
b73d1230 ID	92	/*
	93	* connection request would come from user side
	94	* to do hotplug through specific ioctl.
	95	*/
	96	return ctx->connected ? true : false;
	97	}
	98
9c08e4ba RS	99	static struct edid vidi_get_edid(struct device dev,
9c08e4ba RS	100	struct drm_connector *connector)
b73d1230 ID	101	{
b73d1230 ID	102	struct vidi_context *ctx = get_vidi_context(dev);
9c08e4ba	103	struct edid *edid;
b73d1230	104
b73d1230 ID	105	/*
	106	* the edid data comes from user side and it would be set
	107	* to ctx->raw_edid through specific ioctl.
	108	*/
	109	if (!ctx->raw_edid) {
	110	DRM_DEBUG_KMS("raw_edid is null.\n");
9c08e4ba	111	return ERR_PTR(-EFAULT);
b73d1230 ID	112	}
b73d1230 ID	113
4ddc773b	114	edid = drm_edid_duplicate(ctx->raw_edid);
9c08e4ba RS	115	if (!edid) {
	116	DRM_DEBUG_KMS("failed to allocate edid\n");
	117	return ERR_PTR(-ENOMEM);
	118	}
b73d1230	119
9c08e4ba	120	return edid;
b73d1230 ID	121	}
	122
	123	static void vidi_get_panel(struct device dev)
	124	{
b73d1230 ID	125	/* TODO. */
	126
	127	return NULL;
	128	}
	129
16844fb1	130	static int vidi_check_mode(struct device dev, struct drm_display_mode mode)
b73d1230	131	{
b73d1230 ID	132	/* TODO. */
	133
	134	return 0;
	135	}
	136
	137	static int vidi_display_power_on(struct device *dev, int mode)
	138	{
b73d1230 ID	139	/* TODO */
	140
	141	return 0;
	142	}
	143
	144	static struct exynos_drm_display_ops vidi_display_ops = {
	145	.type = EXYNOS_DISPLAY_TYPE_VIDI,
	146	.is_connected = vidi_display_is_connected,
	147	.get_edid = vidi_get_edid,
	148	.get_panel = vidi_get_panel,
16844fb1	149	.check_mode = vidi_check_mode,
b73d1230 ID	150	.power_on = vidi_display_power_on,
	151	};
	152
	153	static void vidi_dpms(struct device *subdrv_dev, int mode)
	154	{
	155	struct vidi_context *ctx = get_vidi_context(subdrv_dev);
	156
bca34c9a	157	DRM_DEBUG_KMS("%d\n", mode);
b73d1230 ID	158
	159	mutex_lock(&ctx->lock);
	160
	161	switch (mode) {
	162	case DRM_MODE_DPMS_ON:
	163	/* TODO. */
	164	break;
	165	case DRM_MODE_DPMS_STANDBY:
	166	case DRM_MODE_DPMS_SUSPEND:
	167	case DRM_MODE_DPMS_OFF:
	168	/* TODO. */
	169	break;
	170	default:
	171	DRM_DEBUG_KMS("unspecified mode %d\n", mode);
	172	break;
	173	}
	174
	175	mutex_unlock(&ctx->lock);
	176	}
	177
	178	static void vidi_apply(struct device *subdrv_dev)
	179	{
	180	struct vidi_context *ctx = get_vidi_context(subdrv_dev);
677e84c1	181	struct exynos_drm_manager *mgr = ctx->subdrv.manager;
b73d1230 ID	182	struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
	183	struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
	184	struct vidi_win_data *win_data;
	185	int i;
	186
b73d1230 ID	187	for (i = 0; i < WINDOWS_NR; i++) {
	188	win_data = &ctx->win_data[i];
	189	if (win_data->enabled && (ovl_ops && ovl_ops->commit))
	190	ovl_ops->commit(subdrv_dev, i);
	191	}
	192
	193	if (mgr_ops && mgr_ops->commit)
	194	mgr_ops->commit(subdrv_dev);
	195	}
	196
	197	static void vidi_commit(struct device *dev)
	198	{
	199	struct vidi_context *ctx = get_vidi_context(dev);
	200
b73d1230 ID	201	if (ctx->suspended)
	202	return;
	203	}
	204
	205	static int vidi_enable_vblank(struct device *dev)
	206	{
	207	struct vidi_context *ctx = get_vidi_context(dev);
	208
b73d1230 ID	209	if (ctx->suspended)
	210	return -EPERM;
	211
	212	if (!test_and_set_bit(0, &ctx->irq_flags))
	213	ctx->vblank_on = true;
	214
291257cf ID	215	ctx->direct_vblank = true;
	216
	217	/*
	218	* in case of page flip request, vidi_finish_pageflip function
	219	* will not be called because direct_vblank is true and then
	220	* that function will be called by overlay_ops->commit callback
	221	*/
	222	schedule_work(&ctx->work);
	223
b73d1230 ID	224	return 0;
	225	}
	226
	227	static void vidi_disable_vblank(struct device *dev)
	228	{
	229	struct vidi_context *ctx = get_vidi_context(dev);
	230
b73d1230 ID	231	if (ctx->suspended)
	232	return;
	233
	234	if (test_and_clear_bit(0, &ctx->irq_flags))
	235	ctx->vblank_on = false;
	236	}
	237
	238	static struct exynos_drm_manager_ops vidi_manager_ops = {
	239	.dpms = vidi_dpms,
	240	.apply = vidi_apply,
	241	.commit = vidi_commit,
	242	.enable_vblank = vidi_enable_vblank,
	243	.disable_vblank = vidi_disable_vblank,
	244	};
	245
	246	static void vidi_win_mode_set(struct device *dev,
	247	struct exynos_drm_overlay *overlay)
	248	{
	249	struct vidi_context *ctx = get_vidi_context(dev);
	250	struct vidi_win_data *win_data;
	251	int win;
	252	unsigned long offset;
	253
b73d1230 ID	254	if (!overlay) {
	255	dev_err(dev, "overlay is NULL\n");
	256	return;
	257	}
	258
	259	win = overlay->zpos;
	260	if (win == DEFAULT_ZPOS)
	261	win = ctx->default_win;
	262
a7f98d6a	263	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	264	return;
	265
	266	offset = overlay->fb_x * (overlay->bpp >> 3);
	267	offset += overlay->fb_y * overlay->pitch;
	268
	269	DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
	270
	271	win_data = &ctx->win_data[win];
	272
	273	win_data->offset_x = overlay->crtc_x;
	274	win_data->offset_y = overlay->crtc_y;
	275	win_data->ovl_width = overlay->crtc_width;
	276	win_data->ovl_height = overlay->crtc_height;
	277	win_data->fb_width = overlay->fb_width;
	278	win_data->fb_height = overlay->fb_height;
	279	win_data->dma_addr = overlay->dma_addr[0] + offset;
b73d1230 ID	280	win_data->bpp = overlay->bpp;
	281	win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
	282	(overlay->bpp >> 3);
	283	win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
	284
	285	/*
	286	* some parts of win_data should be transferred to user side
	287	* through specific ioctl.
	288	*/
	289
	290	DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
	291	win_data->offset_x, win_data->offset_y);
	292	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
	293	win_data->ovl_width, win_data->ovl_height);
ddd8e959	294	DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
b73d1230 ID	295	DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
	296	overlay->fb_width, overlay->crtc_width);
	297	}
	298
	299	static void vidi_win_commit(struct device *dev, int zpos)
	300	{
	301	struct vidi_context *ctx = get_vidi_context(dev);
	302	struct vidi_win_data *win_data;
	303	int win = zpos;
	304
b73d1230 ID	305	if (ctx->suspended)
	306	return;
	307
	308	if (win == DEFAULT_ZPOS)
	309	win = ctx->default_win;
	310
a7f98d6a	311	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	312	return;
	313
	314	win_data = &ctx->win_data[win];
	315
	316	win_data->enabled = true;
	317
	318	DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
	319
	320	if (ctx->vblank_on)
	321	schedule_work(&ctx->work);
	322	}
	323
	324	static void vidi_win_disable(struct device *dev, int zpos)
	325	{
	326	struct vidi_context *ctx = get_vidi_context(dev);
	327	struct vidi_win_data *win_data;
	328	int win = zpos;
	329
b73d1230 ID	330	if (win == DEFAULT_ZPOS)
	331	win = ctx->default_win;
	332
a7f98d6a	333	if (win < 0 \|\| win >= WINDOWS_NR)
b73d1230 ID	334	return;
	335
	336	win_data = &ctx->win_data[win];
	337	win_data->enabled = false;
	338
	339	/* TODO. */
	340	}
	341
	342	static struct exynos_drm_overlay_ops vidi_overlay_ops = {
	343	.mode_set = vidi_win_mode_set,
	344	.commit = vidi_win_commit,
	345	.disable = vidi_win_disable,
	346	};
	347
677e84c1 JS	348	static struct exynos_drm_manager vidi_manager = {
	349	.pipe = -1,
	350	.ops = &vidi_manager_ops,
	351	.overlay_ops = &vidi_overlay_ops,
	352	.display_ops = &vidi_display_ops,
	353	};
	354
b73d1230 ID	355	static void vidi_fake_vblank_handler(struct work_struct *work)
	356	{
	357	struct vidi_context *ctx = container_of(work, struct vidi_context,
	358	work);
	359	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
677e84c1	360	struct exynos_drm_manager *manager = subdrv->manager;
b73d1230 ID	361
	362	if (manager->pipe < 0)
	363	return;
	364
	365	/* refresh rate is about 50Hz. */
	366	usleep_range(16000, 20000);
	367
291257cf ID	368	mutex_lock(&ctx->lock);
	369
	370	if (ctx->direct_vblank) {
	371	drm_handle_vblank(subdrv->drm_dev, manager->pipe);
	372	ctx->direct_vblank = false;
	373	mutex_unlock(&ctx->lock);
	374	return;
	375	}
	376
	377	mutex_unlock(&ctx->lock);
	378
663d8766	379	exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe);
b73d1230 ID	380	}
	381
	382	static int vidi_subdrv_probe(struct drm_device drm_dev, struct device dev)
	383	{
b73d1230 ID	384	/*
b73d1230 ID	385	* enable drm irq mode.
4423843c	386	* - with irq_enabled = true, we can use the vblank feature.
b73d1230 ID	387	*
	388	* P.S. note that we wouldn't use drm irq handler but
	389	* just specific driver own one instead because
	390	* drm framework supports only one irq handler.
	391	*/
4423843c	392	drm_dev->irq_enabled = true;
b73d1230 ID	393
b73d1230 ID	394	/*
ba0bf120	395	* with vblank_disable_allowed = true, vblank interrupt will be disabled
b73d1230 ID	396	* by drm timer once a current process gives up ownership of
	397	* vblank event.(after drm_vblank_put function is called)
	398	*/
ba0bf120	399	drm_dev->vblank_disable_allowed = true;
b73d1230 ID	400
	401	return 0;
	402	}
	403
29cb6025	404	static void vidi_subdrv_remove(struct drm_device drm_dev, struct device dev)
b73d1230	405	{
b73d1230 ID	406	/* TODO. */
	407	}
	408
	409	static int vidi_power_on(struct vidi_context *ctx, bool enable)
	410	{
	411	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
677e84c1	412	struct device *dev = subdrv->dev;
b73d1230	413
b73d1230 ID	414	if (enable) {
	415	ctx->suspended = false;
	416
	417	/* if vblank was enabled status, enable it again. */
	418	if (test_and_clear_bit(0, &ctx->irq_flags))
	419	vidi_enable_vblank(dev);
	420
	421	vidi_apply(dev);
	422	} else {
	423	ctx->suspended = true;
	424	}
	425
	426	return 0;
	427	}
	428
	429	static int vidi_show_connection(struct device *dev,
	430	struct device_attribute attr, char buf)
	431	{
	432	int rc;
	433	struct vidi_context *ctx = get_vidi_context(dev);
	434
	435	mutex_lock(&ctx->lock);
	436
	437	rc = sprintf(buf, "%d\n", ctx->connected);
	438
	439	mutex_unlock(&ctx->lock);
	440
	441	return rc;
	442	}
	443
	444	static int vidi_store_connection(struct device *dev,
	445	struct device_attribute *attr,
	446	const char *buf, size_t len)
	447	{
	448	struct vidi_context *ctx = get_vidi_context(dev);
	449	int ret;
	450
b73d1230 ID	451	ret = kstrtoint(buf, 0, &ctx->connected);
	452	if (ret)
	453	return ret;
	454
	455	if (ctx->connected > 1)
	456	return -EINVAL;
	457
d07d39df ID	458	/* use fake edid data for test. */
	459	if (!ctx->raw_edid)
	460	ctx->raw_edid = (struct edid *)fake_edid_info;
	461
d7b8478a ID	462	/* if raw_edid isn't same as fake data then it can't be tested. */
	463	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	464	DRM_DEBUG_KMS("edid data is not fake data.\n");
	465	return -EINVAL;
	466	}
	467
b73d1230 ID	468	DRM_DEBUG_KMS("requested connection.\n");
	469
	470	drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
	471
	472	return len;
	473	}
	474
	475	static DEVICE_ATTR(connection, 0644, vidi_show_connection,
	476	vidi_store_connection);
	477
	478	int vidi_connection_ioctl(struct drm_device drm_dev, void data,
	479	struct drm_file *file_priv)
	480	{
	481	struct vidi_context *ctx = NULL;
	482	struct drm_encoder *encoder;
	483	struct exynos_drm_manager *manager;
	484	struct exynos_drm_display_ops *display_ops;
	485	struct drm_exynos_vidi_connection *vidi = data;
	486
b73d1230 ID	487	if (!vidi) {
	488	DRM_DEBUG_KMS("user data for vidi is null.\n");
	489	return -EINVAL;
	490	}
	491
b73d1230 ID	492	if (vidi->connection > 1) {
	493	DRM_DEBUG_KMS("connection should be 0 or 1.\n");
	494	return -EINVAL;
	495	}
	496
	497	list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
	498	head) {
	499	manager = exynos_drm_get_manager(encoder);
	500	display_ops = manager->display_ops;
	501
	502	if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
	503	ctx = get_vidi_context(manager->dev);
	504	break;
	505	}
	506	}
	507
	508	if (!ctx) {
	509	DRM_DEBUG_KMS("not found virtual device type encoder.\n");
	510	return -EINVAL;
	511	}
	512
	513	if (ctx->connected == vidi->connection) {
	514	DRM_DEBUG_KMS("same connection request.\n");
	515	return -EINVAL;
	516	}
	517
d3b62dbf	518	if (vidi->connection) {
e7808df1 SWK	519	struct edid raw_edid = (struct edid )(uint32_t)vidi->edid;
	520	if (!drm_edid_is_valid(raw_edid)) {
	521	DRM_DEBUG_KMS("edid data is invalid.\n");
d3b62dbf ID	522	return -EINVAL;
d3b62dbf ID	523	}
4ddc773b	524	ctx->raw_edid = drm_edid_duplicate(raw_edid);
d3b62dbf ID	525	if (!ctx->raw_edid) {
	526	DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
	527	return -ENOMEM;
	528	}
d3b62dbf ID	529	} else {
	530	/*
	531	* with connection = 0, free raw_edid
	532	* only if raw edid data isn't same as fake data.
	533	*/
	534	if (ctx->raw_edid && ctx->raw_edid !=
	535	(struct edid *)fake_edid_info) {
	536	kfree(ctx->raw_edid);
	537	ctx->raw_edid = NULL;
	538	}
	539	}
b73d1230 ID	540
	541	ctx->connected = vidi->connection;
	542	drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
	543
	544	return 0;
	545	}
	546
56550d94	547	static int vidi_probe(struct platform_device *pdev)
b73d1230 ID	548	{
	549	struct device *dev = &pdev->dev;
	550	struct vidi_context *ctx;
	551	struct exynos_drm_subdrv *subdrv;
	552	int ret;
	553
d873ab99	554	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
b73d1230 ID	555	if (!ctx)
	556	return -ENOMEM;
	557
	558	ctx->default_win = 0;
	559
	560	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
	561
b73d1230	562	subdrv = &ctx->subdrv;
677e84c1 JS	563	subdrv->dev = dev;
677e84c1 JS	564	subdrv->manager = &vidi_manager;
b73d1230 ID	565	subdrv->probe = vidi_subdrv_probe;
b73d1230 ID	566	subdrv->remove = vidi_subdrv_remove;
b73d1230 ID	567
	568	mutex_init(&ctx->lock);
	569
	570	platform_set_drvdata(pdev, ctx);
	571
d873ab99	572	ret = device_create_file(dev, &dev_attr_connection);
b73d1230 ID	573	if (ret < 0)
	574	DRM_INFO("failed to create connection sysfs.\n");
	575
	576	exynos_drm_subdrv_register(subdrv);
	577
	578	return 0;
	579	}
	580
56550d94	581	static int vidi_remove(struct platform_device *pdev)
b73d1230 ID	582	{
	583	struct vidi_context *ctx = platform_get_drvdata(pdev);
	584
b73d1230 ID	585	exynos_drm_subdrv_unregister(&ctx->subdrv);
b73d1230 ID	586
d3b62dbf ID	587	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	588	kfree(ctx->raw_edid);
	589	ctx->raw_edid = NULL;
	590	}
	591
b73d1230 ID	592	return 0;
	593	}
	594
	595	#ifdef CONFIG_PM_SLEEP
	596	static int vidi_suspend(struct device *dev)
	597	{
	598	struct vidi_context *ctx = get_vidi_context(dev);
	599
	600	return vidi_power_on(ctx, false);
	601	}
	602
	603	static int vidi_resume(struct device *dev)
	604	{
	605	struct vidi_context *ctx = get_vidi_context(dev);
	606
	607	return vidi_power_on(ctx, true);
	608	}
	609	#endif
	610
	611	static const struct dev_pm_ops vidi_pm_ops = {
	612	SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
	613	};
	614
	615	struct platform_driver vidi_driver = {
	616	.probe = vidi_probe,
56550d94	617	.remove = vidi_remove,
b73d1230 ID	618	.driver = {
	619	.name = "exynos-drm-vidi",
	620	.owner = THIS_MODULE,
	621	.pm = &vidi_pm_ops,
	622	},
	623	};