9 files changed, 765 insertions, 2 deletions

diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 9a9850afe2f0..3343ac437fe5 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -21,3 +21,9 @@ config DRM_EXYNOS_HDMI
         depends on DRM_EXYNOS && !VIDEO_SAMSUNG_S5P_TV
         help
           Choose this option if you want to use Exynos HDMI for DRM.
+
+config DRM_EXYNOS_VIDI
+        bool "Exynos DRM Virtual Display"
+        depends on DRM_EXYNOS
+        help
+          Choose this option if you want to use Exynos VIDI for DRM.
diff --git a/drivers/gpu/drm/exynos/Makefile b/drivers/gpu/drm/exynos/Makefile
index 5331fa33e13a..9e0bff8badf9 100644
--- a/drivers/gpu/drm/exynos/Makefile
+++ b/drivers/gpu/drm/exynos/Makefile
@@ -12,5 +12,6 @@ exynosdrm-$(CONFIG_DRM_EXYNOS_FIMD)	+= exynos_drm_fimd.o
 exynosdrm-$(CONFIG_DRM_EXYNOS_HDMI)     += exynos_hdmi.o exynos_mixer.o \
                                            exynos_ddc.o exynos_hdmiphy.o \
                                            exynos_drm_hdmi.o
+exynosdrm-$(CONFIG_DRM_EXYNOS_VIDI)     += exynos_drm_vidi.o
 
 obj-$(CONFIG_DRM_EXYNOS)                += exynosdrm.o
diff --git a/drivers/gpu/drm/exynos/exynos_drm_connector.c b/drivers/gpu/drm/exynos/exynos_drm_connector.c
index a5d65912f4d5..ee4ff74bc165 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_connector.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_connector.c
@@ -315,6 +315,10 @@ struct drm_connector *exynos_drm_connector_create(struct drm_device *dev,
                 connector->interlace_allowed = true;
                 connector->polled = DRM_CONNECTOR_POLL_HPD;
                 break;
+        case EXYNOS_DISPLAY_TYPE_VIDI:
+                type = DRM_MODE_CONNECTOR_VIRTUAL;
+                connector->polled = DRM_CONNECTOR_POLL_HPD;
+                break;
         default:
                 type = DRM_MODE_CONNECTOR_Unknown;
                 break;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 1d78e039643b..3453bdd28a47 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -38,6 +38,7 @@
 #include "exynos_drm_fb.h"
 #include "exynos_drm_gem.h"
 #include "exynos_drm_plane.h"
+#include "exynos_drm_vidi.h"
 
 #define DRIVER_NAME     "exynos"
 #define DRIVER_DESC     "Samsung SoC DRM"
@@ -208,6 +209,8 @@ static struct drm_ioctl_desc exynos_ioctls[] = {
                         exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
         DRM_IOCTL_DEF_DRV(EXYNOS_PLANE_SET_ZPOS, exynos_plane_set_zpos_ioctl,
                         DRM_UNLOCKED | DRM_AUTH),
+        DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
+                        vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
 };
 
 static const struct file_operations exynos_drm_driver_fops = {
@@ -298,6 +301,12 @@ static int __init exynos_drm_init(void)
                 goto out_common_hdmi;
 #endif
 
+#ifdef CONFIG_DRM_EXYNOS_VIDI
+        ret = platform_driver_register(&vidi_driver);
+        if (ret < 0)
+                goto out_vidi;
+#endif
+
         ret = platform_driver_register(&exynos_drm_platform_driver);
         if (ret < 0)
                 goto out;
@@ -305,6 +314,11 @@ static int __init exynos_drm_init(void)
         return 0;
 
 out:
+#ifdef CONFIG_DRM_EXYNOS_VIDI
+out_vidi:
+        platform_driver_unregister(&vidi_driver);
+#endif
+
 #ifdef CONFIG_DRM_EXYNOS_HDMI
         platform_driver_unregister(&exynos_drm_common_hdmi_driver);
 out_common_hdmi:
@@ -333,6 +347,10 @@ static void __exit exynos_drm_exit(void)
         platform_driver_unregister(&hdmi_driver);
 #endif
 
+#ifdef CONFIG_DRM_EXYNOS_VIDI
+        platform_driver_unregister(&vidi_driver);
+#endif
+
 #ifdef CONFIG_DRM_EXYNOS_FIMD
         platform_driver_unregister(&fimd_driver);
 #endif
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index b26c2f4425d1..fbd0a232c93d 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -32,9 +32,9 @@
 #include <linux/module.h>
 #include "drm.h"
 
-#define MAX_CRTC        2
+#define MAX_CRTC        3
 #define MAX_PLANE       5
-#define MAX_FB_BUFFER   3
+#define MAX_FB_BUFFER   4
 #define DEFAULT_ZPOS    -1
 
 struct drm_device;
@@ -50,6 +50,8 @@ enum exynos_drm_output_type {
         EXYNOS_DISPLAY_TYPE_LCD,
         /* HDMI Interface. */
         EXYNOS_DISPLAY_TYPE_HDMI,
+        /* Virtual Display Interface. */
+        EXYNOS_DISPLAY_TYPE_VIDI,
 };
 
 /*
@@ -284,4 +286,5 @@ extern struct platform_driver fimd_driver;
 extern struct platform_driver hdmi_driver;
 extern struct platform_driver mixer_driver;
 extern struct platform_driver exynos_drm_common_hdmi_driver;
+extern struct platform_driver vidi_driver;
 #endif
diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.c b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
index 22786765d405..6e9ac7bd1dcf 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
@@ -218,6 +218,7 @@ static unsigned int exynos_drm_encoder_clones(struct drm_encoder *encoder)
                 switch (display_ops->type) {
                 case EXYNOS_DISPLAY_TYPE_LCD:
                 case EXYNOS_DISPLAY_TYPE_HDMI:
+                case EXYNOS_DISPLAY_TYPE_VIDI:
                         clone_mask |= (1 << (cnt++));
                         break;
                 default:
diff --git a/drivers/gpu/drm/exynos/exynos_drm_vidi.c b/drivers/gpu/drm/exynos/exynos_drm_vidi.c
new file mode 100644
index 000000000000..8e1339f9fe1f
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.c
@@ -0,0 +1,676 @@
+/* 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 "drmP.h"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <drm/exynos_drm.h>
+
+#include "drm_edid.h"
+#include "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;
+        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 void vidi_fake_vblank_handler(struct work_struct *work);
+
+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);
+        struct edid *raw_edid;
+
+        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;
+        }
+
+        raw_edid = kzalloc(len, GFP_KERNEL);
+        if (!raw_edid) {
+                DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
+                return -ENOMEM;
+        }
+
+        memcpy(raw_edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
+                                                * EDID_LENGTH, len));
+
+        /* attach the edid data to connector. */
+        connector->display_info.raw_edid = (char *)raw_edid;
+
+        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;
+
+        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 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;
+        bool is_checked = false;
+
+        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;
+
+                is_checked = true;
+
+                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);
+        }
+
+        if (is_checked) {
+                /*
+                 * call drm_vblank_put only in case that drm_vblank_get was
+                 * called.
+                 */
+                if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0)
+                        drm_vblank_put(drm_dev, crtc);
+
+                /*
+                 * don't off vblank if vblank_disable_allowed is 1,
+                 * because vblank would be off by timer handler.
+                 */
+                if (!drm_dev->vblank_disable_allowed)
+                        drm_vblank_off(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);
+
+        drm_handle_vblank(subdrv->drm_dev, manager->pipe);
+        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)
+{
+        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->manager.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;
+
+        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;
+
+        DRM_DEBUG_KMS("%s\n", __FILE__);
+
+        if (!vidi) {
+                DRM_DEBUG_KMS("user data for vidi is null.\n");
+                return -EINVAL;
+        }
+
+        if (!vidi->edid) {
+                DRM_DEBUG_KMS("edid data 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)
+                ctx->raw_edid = (struct edid *)vidi->edid;
+
+        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 = kzalloc(sizeof(*ctx), GFP_KERNEL);
+        if (!ctx)
+                return -ENOMEM;
+
+        ctx->default_win = 0;
+
+        INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
+
+        /* for test */
+        ctx->raw_edid = (struct edid *)fake_edid_info;
+
+        subdrv = &ctx->subdrv;
+        subdrv->probe = vidi_subdrv_probe;
+        subdrv->remove = vidi_subdrv_remove;
+        subdrv->manager.pipe = -1;
+        subdrv->manager.ops = &vidi_manager_ops;
+        subdrv->manager.overlay_ops = &vidi_overlay_ops;
+        subdrv->manager.display_ops = &vidi_display_ops;
+        subdrv->manager.dev = dev;
+
+        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);
+
+        kfree(ctx);
+
+        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,
+        },
+};
diff --git a/drivers/gpu/drm/exynos/exynos_drm_vidi.h b/drivers/gpu/drm/exynos/exynos_drm_vidi.h
new file mode 100644
index 000000000000..a4babe4e65d7
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.h
@@ -0,0 +1,36 @@
+/* exynos_drm_vidi.h
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * Author: Inki Dae <inki.dae@samsung.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _EXYNOS_DRM_VIDI_H_
+#define _EXYNOS_DRM_VIDI_H_
+
+#ifdef CONFIG_DRM_EXYNOS_VIDI
+int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
+                                struct drm_file *file_priv);
+#else
+#define vidi_connection_ioctl   NULL
+#endif
+
+#endif
diff --git a/include/drm/exynos_drm.h b/include/drm/exynos_drm.h
index 81c9cb77476e..3963116083ae 100644
--- a/include/drm/exynos_drm.h
+++ b/include/drm/exynos_drm.h
@@ -74,6 +74,20 @@ struct drm_exynos_gem_mmap {
         uint64_t mapped;
 };
 
+/**
+ * A structure for user connection request of virtual display.
+ *
+ * @connection: indicate whether doing connetion or not by user.
+ * @extensions: if this value is 1 then the vidi driver would need additional
+ *      128bytes edid data.
+ * @edid: the edid data pointer from user side.
+ */
+struct drm_exynos_vidi_connection {
+        unsigned int connection;
+        unsigned int extensions;
+        uint64_t *edid;
+};
+
 struct drm_exynos_plane_set_zpos {
         __u32 plane_id;
         __s32 zpos;
@@ -90,6 +104,7 @@ enum e_drm_exynos_gem_mem_type {
 #define DRM_EXYNOS_GEM_MMAP             0x02
 /* Reserved 0x03 ~ 0x05 for exynos specific gem ioctl */
 #define DRM_EXYNOS_PLANE_SET_ZPOS       0x06
+#define DRM_EXYNOS_VIDI_CONNECTION      0x07
 
 #define DRM_IOCTL_EXYNOS_GEM_CREATE             DRM_IOWR(DRM_COMMAND_BASE + \
                 DRM_EXYNOS_GEM_CREATE, struct drm_exynos_gem_create)
@@ -103,6 +118,9 @@ enum e_drm_exynos_gem_mem_type {
 #define DRM_IOCTL_EXYNOS_PLANE_SET_ZPOS DRM_IOWR(DRM_COMMAND_BASE + \
                 DRM_EXYNOS_PLANE_SET_ZPOS, struct drm_exynos_plane_set_zpos)
 
+#define DRM_IOCTL_EXYNOS_VIDI_CONNECTION        DRM_IOWR(DRM_COMMAND_BASE + \
+                DRM_EXYNOS_VIDI_CONNECTION, struct drm_exynos_vidi_connection)
+
 #ifdef __KERNEL__
 
 /**