[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/module.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"

/* 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;
	void __iomem		*vaddr;
	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);

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

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

static int vidi_get_edid(struct device *dev, struct drm_connector *connector,
				u8 *edid, int len)
{
	struct vidi_context *ctx = get_vidi_context(dev);

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

	/*
	 * 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;
	}

	memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
					* EDID_LENGTH, len));

	return 0;
}

static void *vidi_get_panel(struct device *dev)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/* TODO. */

	return NULL;
}

static int vidi_check_timing(struct device *dev, void *timing)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/* TODO. */

	return 0;
}

static int vidi_display_power_on(struct device *dev, int mode)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/* 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_timing = vidi_check_timing,
	.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("%s, %d\n", __FILE__, 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;

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

	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);

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

	if (ctx->suspended)
		return;
}

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

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

	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);

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

	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;

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

	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->vaddr = overlay->vaddr[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, vaddr = 0x%lx\n",
			(unsigned long)win_data->dma_addr,
			(unsigned long)win_data->vaddr);
	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;

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

	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;

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

	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_finish_pageflip(struct drm_device *drm_dev, int crtc)
{
	struct exynos_drm_private *dev_priv = drm_dev->dev_private;
	struct drm_pending_vblank_event *e, *t;
	struct timeval now;
	unsigned long flags;

	spin_lock_irqsave(&drm_dev->event_lock, flags);

	list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
			base.link) {
		/* if event's pipe isn't same as crtc then ignore it. */
		if (crtc != e->pipe)
			continue;

		do_gettimeofday(&now);
		e->event.sequence = 0;
		e->event.tv_sec = now.tv_sec;
		e->event.tv_usec = now.tv_usec;

		list_move_tail(&e->base.link, &e->base.file_priv->event_list);
		wake_up_interruptible(&e->base.file_priv->event_wait);
		drm_vblank_put(drm_dev, crtc);
	}

	spin_unlock_irqrestore(&drm_dev->event_lock, flags);
}

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);

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

static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/*
	 * 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 void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/* TODO. */
}

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

	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(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;

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

	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;
	struct edid *raw_edid;
	int edid_len;

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

	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) {
		if (!vidi->edid) {
			DRM_DEBUG_KMS("edid data is null.\n");
			return -EINVAL;
		}
		raw_edid = (struct edid *)(uint32_t)vidi->edid;
		edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
		ctx->raw_edid = kzalloc(edid_len, GFP_KERNEL);
		if (!ctx->raw_edid) {
			DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
			return -ENOMEM;
		}
		memcpy(ctx->raw_edid, raw_edid, edid_len);
	} 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 __devinit vidi_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct vidi_context *ctx;
	struct exynos_drm_subdrv *subdrv;
	int ret;

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

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

	ctx->default_win = 0;

	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);

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

	exynos_drm_subdrv_register(subdrv);

	return 0;
}

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

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

	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		= __devexit_p(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
	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
	17	#include <linux/platform_device.h>
	18
	19	#include <drm/exynos_drm.h>
	20
760285e7 DH	21	#include <drm/drm_edid.h>
760285e7 DH	22	#include <drm/drm_crtc_helper.h>
b73d1230 ID	23
	24	#include "exynos_drm_drv.h"
	25	#include "exynos_drm_crtc.h"
	26	#include "exynos_drm_encoder.h"
	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;
	42	void __iomem *vaddr;
	43	unsigned int buf_offsize;
	44	unsigned int line_size; /* bytes */
	45	bool enabled;
	46	};
	47
	48	struct vidi_context {
	49	struct exynos_drm_subdrv subdrv;
	50	struct drm_crtc *crtc;
	51	struct vidi_win_data win_data[WINDOWS_NR];
	52	struct edid *raw_edid;
	53	unsigned int clkdiv;
	54	unsigned int default_win;
	55	unsigned long irq_flags;
	56	unsigned int connected;
	57	bool vblank_on;
	58	bool suspended;
291257cf	59	bool direct_vblank;
b73d1230 ID	60	struct work_struct work;
	61	struct mutex lock;
	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
b73d1230 ID	89	static bool vidi_display_is_connected(struct device *dev)
	90	{
	91	struct vidi_context *ctx = get_vidi_context(dev);
	92
	93	DRM_DEBUG_KMS("%s\n", __FILE__);
	94
	95	/*
	96	* connection request would come from user side
	97	* to do hotplug through specific ioctl.
	98	*/
	99	return ctx->connected ? true : false;
	100	}
	101
	102	static int vidi_get_edid(struct device dev, struct drm_connector connector,
	103	u8 *edid, int len)
	104	{
	105	struct vidi_context *ctx = get_vidi_context(dev);
b73d1230 ID	106
	107	DRM_DEBUG_KMS("%s\n", __FILE__);
	108
	109	/*
	110	* the edid data comes from user side and it would be set
	111	* to ctx->raw_edid through specific ioctl.
	112	*/
	113	if (!ctx->raw_edid) {
	114	DRM_DEBUG_KMS("raw_edid is null.\n");
	115	return -EFAULT;
	116	}
	117
b73d1230 ID	118	memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
	119	* EDID_LENGTH, len));
	120
	121	return 0;
	122	}
	123
	124	static void vidi_get_panel(struct device dev)
	125	{
	126	DRM_DEBUG_KMS("%s\n", __FILE__);
	127
	128	/* TODO. */
	129
	130	return NULL;
	131	}
	132
	133	static int vidi_check_timing(struct device dev, void timing)
	134	{
	135	DRM_DEBUG_KMS("%s\n", __FILE__);
	136
	137	/* TODO. */
	138
	139	return 0;
	140	}
	141
	142	static int vidi_display_power_on(struct device *dev, int mode)
	143	{
	144	DRM_DEBUG_KMS("%s\n", __FILE__);
	145
	146	/* TODO */
	147
	148	return 0;
	149	}
	150
	151	static struct exynos_drm_display_ops vidi_display_ops = {
	152	.type = EXYNOS_DISPLAY_TYPE_VIDI,
	153	.is_connected = vidi_display_is_connected,
	154	.get_edid = vidi_get_edid,
	155	.get_panel = vidi_get_panel,
	156	.check_timing = vidi_check_timing,
	157	.power_on = vidi_display_power_on,
	158	};
	159
	160	static void vidi_dpms(struct device *subdrv_dev, int mode)
	161	{
	162	struct vidi_context *ctx = get_vidi_context(subdrv_dev);
	163
	164	DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
	165
	166	mutex_lock(&ctx->lock);
	167
	168	switch (mode) {
	169	case DRM_MODE_DPMS_ON:
	170	/* TODO. */
	171	break;
	172	case DRM_MODE_DPMS_STANDBY:
	173	case DRM_MODE_DPMS_SUSPEND:
	174	case DRM_MODE_DPMS_OFF:
	175	/* TODO. */
	176	break;
	177	default:
	178	DRM_DEBUG_KMS("unspecified mode %d\n", mode);
	179	break;
	180	}
	181
182	mutex_unlock(&ctx->lock);
183	}
184
185	static void vidi_apply(struct device *subdrv_dev)
186	{
187	struct vidi_context *ctx = get_vidi_context(subdrv_dev);
677e84c1	188	struct exynos_drm_manager *mgr = ctx->subdrv.manager;
b73d1230 ID	189	struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
	190	struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
	191	struct vidi_win_data *win_data;
	192	int i;
	193
	194	DRM_DEBUG_KMS("%s\n", __FILE__);
	195
	196	for (i = 0; i < WINDOWS_NR; i++) {
	197	win_data = &ctx->win_data[i];
	198	if (win_data->enabled && (ovl_ops && ovl_ops->commit))
	199	ovl_ops->commit(subdrv_dev, i);
	200	}
	201
	202	if (mgr_ops && mgr_ops->commit)
	203	mgr_ops->commit(subdrv_dev);
	204	}
	205
	206	static void vidi_commit(struct device *dev)
	207	{
	208	struct vidi_context *ctx = get_vidi_context(dev);
	209
	210	DRM_DEBUG_KMS("%s\n", __FILE__);
	211
	212	if (ctx->suspended)
	213	return;
	214	}
	215
	216	static int vidi_enable_vblank(struct device *dev)
	217	{
	218	struct vidi_context *ctx = get_vidi_context(dev);
	219
	220	DRM_DEBUG_KMS("%s\n", __FILE__);
	221
	222	if (ctx->suspended)
	223	return -EPERM;
	224
	225	if (!test_and_set_bit(0, &ctx->irq_flags))
	226	ctx->vblank_on = true;
	227
291257cf ID	228	ctx->direct_vblank = true;
	229
	230	/*
	231	* in case of page flip request, vidi_finish_pageflip function
	232	* will not be called because direct_vblank is true and then
	233	* that function will be called by overlay_ops->commit callback
	234	*/
	235	schedule_work(&ctx->work);
	236
b73d1230 ID	237	return 0;
	238	}
	239
	240	static void vidi_disable_vblank(struct device *dev)
	241	{
	242	struct vidi_context *ctx = get_vidi_context(dev);
	243
	244	DRM_DEBUG_KMS("%s\n", __FILE__);
	245
	246	if (ctx->suspended)
	247	return;
	248
	249	if (test_and_clear_bit(0, &ctx->irq_flags))
	250	ctx->vblank_on = false;
	251	}
	252
	253	static struct exynos_drm_manager_ops vidi_manager_ops = {
	254	.dpms = vidi_dpms,
	255	.apply = vidi_apply,
	256	.commit = vidi_commit,
	257	.enable_vblank = vidi_enable_vblank,
	258	.disable_vblank = vidi_disable_vblank,
	259	};
	260
	261	static void vidi_win_mode_set(struct device *dev,
	262	struct exynos_drm_overlay *overlay)
	263	{
	264	struct vidi_context *ctx = get_vidi_context(dev);
	265	struct vidi_win_data *win_data;
	266	int win;
	267	unsigned long offset;
	268
	269	DRM_DEBUG_KMS("%s\n", __FILE__);
	270
	271	if (!overlay) {
	272	dev_err(dev, "overlay is NULL\n");
	273	return;
	274	}
	275
	276	win = overlay->zpos;
	277	if (win == DEFAULT_ZPOS)
	278	win = ctx->default_win;
	279
	280	if (win < 0 \|\| win > WINDOWS_NR)
	281	return;
	282
	283	offset = overlay->fb_x * (overlay->bpp >> 3);
	284	offset += overlay->fb_y * overlay->pitch;
	285
	286	DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
	287
	288	win_data = &ctx->win_data[win];
	289
	290	win_data->offset_x = overlay->crtc_x;
	291	win_data->offset_y = overlay->crtc_y;
	292	win_data->ovl_width = overlay->crtc_width;
	293	win_data->ovl_height = overlay->crtc_height;
	294	win_data->fb_width = overlay->fb_width;
	295	win_data->fb_height = overlay->fb_height;
	296	win_data->dma_addr = overlay->dma_addr[0] + offset;
	297	win_data->vaddr = overlay->vaddr[0] + offset;
	298	win_data->bpp = overlay->bpp;
	299	win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
	300	(overlay->bpp >> 3);
301	win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
302
303	/*
304	* some parts of win_data should be transferred to user side
305	* through specific ioctl.
306	*/
307
308	DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
309	win_data->offset_x, win_data->offset_y);
310	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
311	win_data->ovl_width, win_data->ovl_height);
312	DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n",
313	(unsigned long)win_data->dma_addr,
314	(unsigned long)win_data->vaddr);
315	DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
316	overlay->fb_width, overlay->crtc_width);
317	}
318
319	static void vidi_win_commit(struct device *dev, int zpos)
320	{
321	struct vidi_context *ctx = get_vidi_context(dev);
322	struct vidi_win_data *win_data;
323	int win = zpos;
324
325	DRM_DEBUG_KMS("%s\n", __FILE__);
326
327	if (ctx->suspended)
328	return;
329
330	if (win == DEFAULT_ZPOS)
331	win = ctx->default_win;
332
333	if (win < 0 \|\| win > WINDOWS_NR)
334	return;
335
336	win_data = &ctx->win_data[win];
337
338	win_data->enabled = true;
339
340	DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
341
342	if (ctx->vblank_on)
343	schedule_work(&ctx->work);
344	}
345
346	static void vidi_win_disable(struct device *dev, int zpos)
347	{
348	struct vidi_context *ctx = get_vidi_context(dev);
349	struct vidi_win_data *win_data;
350	int win = zpos;
351
352	DRM_DEBUG_KMS("%s\n", __FILE__);
353
354	if (win == DEFAULT_ZPOS)
355	win = ctx->default_win;
356
357	if (win < 0 \|\| win > WINDOWS_NR)
358	return;
359
360	win_data = &ctx->win_data[win];
361	win_data->enabled = false;
362
363	/* TODO. */
364	}
365
366	static struct exynos_drm_overlay_ops vidi_overlay_ops = {
367	.mode_set = vidi_win_mode_set,
368	.commit = vidi_win_commit,
369	.disable = vidi_win_disable,
370	};
371
677e84c1 JS	372	static struct exynos_drm_manager vidi_manager = {
	373	.pipe = -1,
	374	.ops = &vidi_manager_ops,
	375	.overlay_ops = &vidi_overlay_ops,
	376	.display_ops = &vidi_display_ops,
	377	};
	378
b73d1230 ID	379	static void vidi_finish_pageflip(struct drm_device *drm_dev, int crtc)
	380	{
	381	struct exynos_drm_private *dev_priv = drm_dev->dev_private;
	382	struct drm_pending_vblank_event e, t;
	383	struct timeval now;
	384	unsigned long flags;
b73d1230 ID	385
	386	spin_lock_irqsave(&drm_dev->event_lock, flags);
	387
	388	list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
	389	base.link) {
	390	/* if event's pipe isn't same as crtc then ignore it. */
	391	if (crtc != e->pipe)
	392	continue;
	393
b73d1230 ID	394	do_gettimeofday(&now);
	395	e->event.sequence = 0;
	396	e->event.tv_sec = now.tv_sec;
	397	e->event.tv_usec = now.tv_usec;
	398
	399	list_move_tail(&e->base.link, &e->base.file_priv->event_list);
	400	wake_up_interruptible(&e->base.file_priv->event_wait);
e1f48ee5	401	drm_vblank_put(drm_dev, crtc);
b73d1230 ID	402	}
b73d1230 ID	403
b73d1230 ID	404	spin_unlock_irqrestore(&drm_dev->event_lock, flags);
	405	}
	406
	407	static void vidi_fake_vblank_handler(struct work_struct *work)
	408	{
	409	struct vidi_context *ctx = container_of(work, struct vidi_context,
	410	work);
	411	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
677e84c1	412	struct exynos_drm_manager *manager = subdrv->manager;
b73d1230 ID	413
	414	if (manager->pipe < 0)
	415	return;
	416
	417	/* refresh rate is about 50Hz. */
	418	usleep_range(16000, 20000);
	419
291257cf ID	420	mutex_lock(&ctx->lock);
	421
	422	if (ctx->direct_vblank) {
	423	drm_handle_vblank(subdrv->drm_dev, manager->pipe);
	424	ctx->direct_vblank = false;
	425	mutex_unlock(&ctx->lock);
	426	return;
	427	}
	428
	429	mutex_unlock(&ctx->lock);
	430
b73d1230 ID	431	vidi_finish_pageflip(subdrv->drm_dev, manager->pipe);
	432	}
	433
	434	static int vidi_subdrv_probe(struct drm_device drm_dev, struct device dev)
	435	{
	436	DRM_DEBUG_KMS("%s\n", __FILE__);
	437
	438	/*
	439	* enable drm irq mode.
	440	* - with irq_enabled = 1, we can use the vblank feature.
	441	*
	442	* P.S. note that we wouldn't use drm irq handler but
	443	* just specific driver own one instead because
	444	* drm framework supports only one irq handler.
	445	*/
	446	drm_dev->irq_enabled = 1;
	447
	448	/*
	449	* with vblank_disable_allowed = 1, vblank interrupt will be disabled
	450	* by drm timer once a current process gives up ownership of
	451	* vblank event.(after drm_vblank_put function is called)
	452	*/
	453	drm_dev->vblank_disable_allowed = 1;
	454
	455	return 0;
	456	}
	457
29cb6025	458	static void vidi_subdrv_remove(struct drm_device drm_dev, struct device dev)
b73d1230 ID	459	{
	460	DRM_DEBUG_KMS("%s\n", __FILE__);
	461
	462	/* TODO. */
	463	}
	464
	465	static int vidi_power_on(struct vidi_context *ctx, bool enable)
	466	{
	467	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
677e84c1	468	struct device *dev = subdrv->dev;
b73d1230 ID	469
	470	DRM_DEBUG_KMS("%s\n", __FILE__);
	471
	472	if (enable != false && enable != true)
	473	return -EINVAL;
	474
	475	if (enable) {
	476	ctx->suspended = false;
	477
	478	/* if vblank was enabled status, enable it again. */
	479	if (test_and_clear_bit(0, &ctx->irq_flags))
	480	vidi_enable_vblank(dev);
	481
	482	vidi_apply(dev);
	483	} else {
	484	ctx->suspended = true;
	485	}
	486
	487	return 0;
	488	}
	489
	490	static int vidi_show_connection(struct device *dev,
	491	struct device_attribute attr, char buf)
	492	{
	493	int rc;
	494	struct vidi_context *ctx = get_vidi_context(dev);
	495
	496	mutex_lock(&ctx->lock);
	497
	498	rc = sprintf(buf, "%d\n", ctx->connected);
	499
	500	mutex_unlock(&ctx->lock);
	501
	502	return rc;
	503	}
	504
	505	static int vidi_store_connection(struct device *dev,
	506	struct device_attribute *attr,
	507	const char *buf, size_t len)
	508	{
	509	struct vidi_context *ctx = get_vidi_context(dev);
	510	int ret;
	511
	512	DRM_DEBUG_KMS("%s\n", __FILE__);
	513
	514	ret = kstrtoint(buf, 0, &ctx->connected);
	515	if (ret)
	516	return ret;
	517
	518	if (ctx->connected > 1)
	519	return -EINVAL;
	520
d07d39df ID	521	/* use fake edid data for test. */
	522	if (!ctx->raw_edid)
	523	ctx->raw_edid = (struct edid *)fake_edid_info;
	524
d7b8478a ID	525	/* if raw_edid isn't same as fake data then it can't be tested. */
	526	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	527	DRM_DEBUG_KMS("edid data is not fake data.\n");
	528	return -EINVAL;
	529	}
	530
b73d1230 ID	531	DRM_DEBUG_KMS("requested connection.\n");
	532
	533	drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
	534
	535	return len;
	536	}
	537
	538	static DEVICE_ATTR(connection, 0644, vidi_show_connection,
	539	vidi_store_connection);
	540
	541	int vidi_connection_ioctl(struct drm_device drm_dev, void data,
	542	struct drm_file *file_priv)
	543	{
	544	struct vidi_context *ctx = NULL;
	545	struct drm_encoder *encoder;
	546	struct exynos_drm_manager *manager;
	547	struct exynos_drm_display_ops *display_ops;
	548	struct drm_exynos_vidi_connection *vidi = data;
d3b62dbf ID	549	struct edid *raw_edid;
d3b62dbf ID	550	int edid_len;
b73d1230 ID	551
	552	DRM_DEBUG_KMS("%s\n", __FILE__);
	553
	554	if (!vidi) {
	555	DRM_DEBUG_KMS("user data for vidi is null.\n");
	556	return -EINVAL;
	557	}
	558
b73d1230 ID	559	if (vidi->connection > 1) {
	560	DRM_DEBUG_KMS("connection should be 0 or 1.\n");
	561	return -EINVAL;
	562	}
	563
	564	list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
	565	head) {
	566	manager = exynos_drm_get_manager(encoder);
	567	display_ops = manager->display_ops;
	568
	569	if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
	570	ctx = get_vidi_context(manager->dev);
	571	break;
	572	}
	573	}
	574
	575	if (!ctx) {
	576	DRM_DEBUG_KMS("not found virtual device type encoder.\n");
	577	return -EINVAL;
	578	}
	579
	580	if (ctx->connected == vidi->connection) {
	581	DRM_DEBUG_KMS("same connection request.\n");
	582	return -EINVAL;
	583	}
	584
d3b62dbf ID	585	if (vidi->connection) {
	586	if (!vidi->edid) {
	587	DRM_DEBUG_KMS("edid data is null.\n");
	588	return -EINVAL;
	589	}
f91f2f33	590	raw_edid = (struct edid *)(uint32_t)vidi->edid;
d3b62dbf ID	591	edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
	592	ctx->raw_edid = kzalloc(edid_len, GFP_KERNEL);
	593	if (!ctx->raw_edid) {
	594	DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
	595	return -ENOMEM;
	596	}
	597	memcpy(ctx->raw_edid, raw_edid, edid_len);
	598	} else {
	599	/*
	600	* with connection = 0, free raw_edid
	601	* only if raw edid data isn't same as fake data.
	602	*/
	603	if (ctx->raw_edid && ctx->raw_edid !=
	604	(struct edid *)fake_edid_info) {
	605	kfree(ctx->raw_edid);
	606	ctx->raw_edid = NULL;
	607	}
	608	}
b73d1230 ID	609
	610	ctx->connected = vidi->connection;
	611	drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
	612
	613	return 0;
	614	}
	615
	616	static int __devinit vidi_probe(struct platform_device *pdev)
	617	{
	618	struct device *dev = &pdev->dev;
	619	struct vidi_context *ctx;
	620	struct exynos_drm_subdrv *subdrv;
	621	int ret;
	622
	623	DRM_DEBUG_KMS("%s\n", __FILE__);
	624
59848db5	625	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
b73d1230 ID	626	if (!ctx)
	627	return -ENOMEM;
	628
	629	ctx->default_win = 0;
	630
	631	INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
	632
b73d1230	633	subdrv = &ctx->subdrv;
677e84c1 JS	634	subdrv->dev = dev;
677e84c1 JS	635	subdrv->manager = &vidi_manager;
b73d1230 ID	636	subdrv->probe = vidi_subdrv_probe;
b73d1230 ID	637	subdrv->remove = vidi_subdrv_remove;
b73d1230 ID	638
	639	mutex_init(&ctx->lock);
	640
	641	platform_set_drvdata(pdev, ctx);
	642
	643	ret = device_create_file(&pdev->dev, &dev_attr_connection);
	644	if (ret < 0)
	645	DRM_INFO("failed to create connection sysfs.\n");
	646
	647	exynos_drm_subdrv_register(subdrv);
	648
	649	return 0;
	650	}
	651
	652	static int __devexit vidi_remove(struct platform_device *pdev)
	653	{
	654	struct vidi_context *ctx = platform_get_drvdata(pdev);
	655
	656	DRM_DEBUG_KMS("%s\n", __FILE__);
	657
	658	exynos_drm_subdrv_unregister(&ctx->subdrv);
	659
d3b62dbf ID	660	if (ctx->raw_edid != (struct edid *)fake_edid_info) {
	661	kfree(ctx->raw_edid);
	662	ctx->raw_edid = NULL;
	663	}
	664
b73d1230 ID	665	return 0;
	666	}
	667
	668	#ifdef CONFIG_PM_SLEEP
	669	static int vidi_suspend(struct device *dev)
	670	{
	671	struct vidi_context *ctx = get_vidi_context(dev);
	672
	673	return vidi_power_on(ctx, false);
	674	}
	675
	676	static int vidi_resume(struct device *dev)
	677	{
	678	struct vidi_context *ctx = get_vidi_context(dev);
	679
	680	return vidi_power_on(ctx, true);
	681	}
	682	#endif
	683
	684	static const struct dev_pm_ops vidi_pm_ops = {
	685	SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
	686	};
	687
	688	struct platform_driver vidi_driver = {
	689	.probe = vidi_probe,
	690	.remove = __devexit_p(vidi_remove),
	691	.driver = {
	692	.name = "exynos-drm-vidi",
	693	.owner = THIS_MODULE,
	694	.pm = &vidi_pm_ops,
	695	},
	696	};