diff --git a/drivers/video/drm/drm_dp_helper.c b/drivers/video/drm/drm_dp_helper.c
index 4b825c3f8b..cf89607093 100644
--- a/drivers/video/drm/drm_dp_helper.c
+++ b/drivers/video/drm/drm_dp_helper.c
@@ -22,7 +22,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
-//#include <linux/delay.h>
+#include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
diff --git a/drivers/video/drm/i915/i915_dma.c b/drivers/video/drm/i915/i915_dma.c
index 66f263a4f8..fc6427434f 100644
--- a/drivers/video/drm/i915/i915_dma.c
+++ b/drivers/video/drm/i915/i915_dma.c
@@ -44,7 +44,7 @@
 //#include <linux/pnp.h>
 //#include <linux/vga_switcheroo.h>
 #include <linux/slab.h>
-//#include <acpi/video.h>
+#include <linux/pm.h>
 #include <linux/pm_runtime.h>
 
 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen);
diff --git a/drivers/video/drm/i915/i915_drv.h b/drivers/video/drm/i915/i915_drv.h
index f4e7bf639f..d92b8a6c60 100644
--- a/drivers/video/drm/i915/i915_drv.h
+++ b/drivers/video/drm/i915/i915_drv.h
@@ -2691,10 +2691,10 @@ struct i915_params {
 	bool verbose_state_checks;
 	bool nuclear_pageflip;
 	int edp_vswing;
-				/* Kolibri related */
-	int fbsize;
-	char *log_file;
-	char *cmdline_mode;
+                /* Kolibri related */
+    int fbsize;
+    char *log_file;
+    char *cmdline_mode;
 };
 extern struct i915_params i915 __read_mostly;
 
@@ -3540,7 +3540,7 @@ wait_remaining_ms_from_jiffies(unsigned long timestamp_jiffies, int to_wait_ms)
 
 	if (time_after(target_jiffies, tmp_jiffies)) {
 		remaining_jiffies = target_jiffies - tmp_jiffies;
-        delay(remaining_jiffies);
+		delay(remaining_jiffies);
 	}
 }
 
diff --git a/drivers/video/drm/i915/i915_gem.c b/drivers/video/drm/i915/i915_gem.c
index 4010e50e13..d330bcd3ab 100644
--- a/drivers/video/drm/i915/i915_gem.c
+++ b/drivers/video/drm/i915/i915_gem.c
@@ -1055,7 +1055,7 @@ int __i915_wait_request(struct drm_i915_gem_request *req,
 	wait.evnt = CreateEvent(NULL, MANUAL_DESTROY);
 
 	for (;;) {
-        unsigned long flags;
+		unsigned long flags;
 
 		/* We need to check whether any gpu reset happened in between
 		 * the caller grabbing the seqno and now ... */
diff --git a/drivers/video/drm/i915/i915_irq.c b/drivers/video/drm/i915/i915_irq.c
index 3e7a2ecf51..87e9337f35 100644
--- a/drivers/video/drm/i915/i915_irq.c
+++ b/drivers/video/drm/i915/i915_irq.c
@@ -28,6 +28,7 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#include <linux/sysrq.h>
 #include <linux/slab.h>
 #include <linux/circ_buf.h>
 #include <drm/drmP.h>
diff --git a/drivers/video/drm/i915/intel_dp.c b/drivers/video/drm/i915/intel_dp.c
index 65236b4276..c86ef78d6c 100644
--- a/drivers/video/drm/i915/intel_dp.c
+++ b/drivers/video/drm/i915/intel_dp.c
@@ -1085,6 +1085,14 @@ intel_dp_aux_init(struct intel_dp *intel_dp, struct intel_connector *connector)
 			  name, ret);
 		return;
 	}
+
+	ret = sysfs_create_link(&connector->base.kdev->kobj,
+				&intel_dp->aux.ddc.dev.kobj,
+				intel_dp->aux.ddc.dev.kobj.name);
+	if (ret < 0) {
+		DRM_ERROR("sysfs_create_link() for %s failed (%d)\n", name, ret);
+		drm_dp_aux_unregister(&intel_dp->aux);
+	}
 }
 
 static void
@@ -1092,6 +1100,9 @@ intel_dp_connector_unregister(struct intel_connector *intel_connector)
 {
 	struct intel_dp *intel_dp = intel_attached_dp(&intel_connector->base);
 
+	if (!intel_connector->mst_port)
+		sysfs_remove_link(&intel_connector->base.kdev->kobj,
+				  intel_dp->aux.ddc.dev.kobj.name);
 	intel_connector_unregister(intel_connector);
 }
 
diff --git a/drivers/video/drm/i915/intel_opregion.c b/drivers/video/drm/i915/intel_opregion.c
index b0992135cd..3f1510139f 100644
--- a/drivers/video/drm/i915/intel_opregion.c
+++ b/drivers/video/drm/i915/intel_opregion.c
@@ -25,8 +25,6 @@
  *
  */
 
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
 #include <linux/acpi.h>
 #include <acpi/video.h>
 
diff --git a/drivers/video/drm/i915/intel_sdvo.c b/drivers/video/drm/i915/intel_sdvo.c
index 12c645e3e7..44e5fd2646 100644
--- a/drivers/video/drm/i915/intel_sdvo.c
+++ b/drivers/video/drm/i915/intel_sdvo.c
@@ -2347,6 +2347,8 @@ intel_sdvo_connector_unregister(struct intel_connector *intel_connector)
 	drm_connector = &intel_connector->base;
 	sdvo_encoder = intel_attached_sdvo(&intel_connector->base);
 
+	sysfs_remove_link(&drm_connector->kdev->kobj,
+			  sdvo_encoder->ddc.dev.kobj.name);
 	intel_connector_unregister(intel_connector);
 }
 
@@ -2379,6 +2381,12 @@ intel_sdvo_connector_init(struct intel_sdvo_connector *connector,
 	if (ret < 0)
 		goto err1;
 
+	ret = sysfs_create_link(&drm_connector->kdev->kobj,
+				&encoder->ddc.dev.kobj,
+				encoder->ddc.dev.kobj.name);
+	if (ret < 0)
+		goto err2;
+
 	return 0;
 
 err2:
diff --git a/drivers/video/drm/i915/intel_sprite.c b/drivers/video/drm/i915/intel_sprite.c
index 634b1aa03c..11495a8d15 100644
--- a/drivers/video/drm/i915/intel_sprite.c
+++ b/drivers/video/drm/i915/intel_sprite.c
@@ -85,9 +85,8 @@ void intel_pipe_update_start(struct intel_crtc *crtc)
 	enum pipe pipe = crtc->pipe;
 	long timeout = msecs_to_jiffies_timeout(1);
 	int scanline, min, max, vblank_start;
-#if 0
-//   wait_queue_head_t *wq = drm_crtc_vblank_waitqueue(&crtc->base);
-//   DEFINE_WAIT(wait);
+	wait_queue_head_t *wq = drm_crtc_vblank_waitqueue(&crtc->base);
+	DEFINE_WAIT(wait);
 
 	vblank_start = adjusted_mode->crtc_vblank_start;
 	if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
@@ -97,11 +96,13 @@ void intel_pipe_update_start(struct intel_crtc *crtc)
 	min = vblank_start - usecs_to_scanlines(adjusted_mode, 100);
 	max = vblank_start - 1;
 
+	local_irq_disable();
+
 	if (min <= 0 || max <= 0)
 		return;
 
-//   if (WARN_ON(drm_vblank_get(dev, pipe)))
-//       return false;
+	if (WARN_ON(drm_crtc_vblank_get(&crtc->base)))
+		return;
 
 	crtc->debug.min_vbl = min;
 	crtc->debug.max_vbl = max;
@@ -125,15 +126,21 @@ void intel_pipe_update_start(struct intel_crtc *crtc)
 			break;
 		}
 
-//       local_irq_enable();
-
-        schedule_timeout(timeout);
-        timeout = 0;
-//       local_irq_disable();
+		local_irq_enable();
+		
+		{
+			unsigned long expire;
+			expire = timeout + jiffies;
+			WaitEventTimeout(wait.evnt, timeout);;
+			timeout = expire - jiffies;
+			timeout = timeout < 0 ? 0 : timeout;
+		}
+		local_irq_disable();
 	}
 
 	finish_wait(wq, &wait);
-#endif
+
+	drm_crtc_vblank_put(&crtc->base);
 
 	crtc->debug.scanline_start = scanline;
 	crtc->debug.start_vbl_time = ktime_get();
@@ -162,7 +169,7 @@ void intel_pipe_update_end(struct intel_crtc *crtc)
 
 	trace_i915_pipe_update_end(crtc, end_vbl_count, scanline_end);
 
-//   local_irq_enable();
+	local_irq_enable();
 
 	if (crtc->debug.start_vbl_count &&
 	    crtc->debug.start_vbl_count != end_vbl_count) {
diff --git a/drivers/video/drm/i915/kms_display.c b/drivers/video/drm/i915/kms_display.c
index 1243c519b1..1b29ccff7f 100644
--- a/drivers/video/drm/i915/kms_display.c
+++ b/drivers/video/drm/i915/kms_display.c
@@ -74,8 +74,6 @@ static int set_mode(struct drm_device *dev, struct drm_connector *connector,
     int stride;
     int ret;
 
-ENTER();
-
     drm_modeset_lock_all(dev);
 
     list_for_each_entry(tmpc, &dev->mode_config.connector_list, head)
@@ -206,8 +204,6 @@ do_set:
 
     drm_modeset_unlock_all(dev);
 
-LEAVE();
-
     return ret;
 }
 
@@ -223,8 +219,6 @@ static int set_mode_ex(struct drm_device *dev,
     int stride;
     int ret;
 
-ENTER();
-
     drm_modeset_lock_all(dev);
 
     list_for_each_entry(tmpc, &dev->mode_config.connector_list, head)
@@ -322,8 +316,6 @@ ENTER();
 
     drm_modeset_unlock_all(dev);
 
-LEAVE();
-
     return ret;
 }
 
@@ -422,10 +414,7 @@ static struct drm_connector* get_cmdline_connector(struct drm_device *dev, const
 static int choose_config(struct drm_device *dev, struct drm_connector **boot_connector,
                   struct drm_crtc **boot_crtc)
 {
-    const struct drm_connector_helper_funcs *connector_funcs;
-    struct drm_connector *connector = NULL;
-    struct drm_encoder   *encoder = NULL;
-    struct drm_crtc      *crtc = NULL;
+    struct drm_connector *connector;
 
     if((i915.cmdline_mode != NULL) && (*i915.cmdline_mode != 0))
     {
@@ -451,6 +440,7 @@ static int choose_config(struct drm_device *dev, struct drm_connector **boot_con
     return -ENOENT;
 };
 
+
 static int get_boot_mode(struct drm_connector *connector, videomode_t *usermode)
 {
     struct drm_display_mode *mode;
@@ -481,8 +471,6 @@ int init_display_kms(struct drm_device *dev, videomode_t *usermode)
     u32      ifl;
     int       ret;
 
-ENTER();
-
     mutex_lock(&dev->mode_config.mutex);
     ret = choose_config(dev, &connector, &crtc);
     if(ret)
@@ -571,8 +559,6 @@ ENTER();
     err = init_bitmaps();
 #endif
 
-    LEAVE();
-
     return ret;
 };
 
@@ -581,13 +567,12 @@ int set_cmdline_mode_ext(struct drm_device *dev, const char *cmdline)
 {
     struct drm_connector_helper_funcs *connector_funcs;
     struct drm_connector    *connector;
-    struct drm_cmdline_mode cmd_mode;
+    struct drm_cmdline_mode cmd_mode = {0};
     struct drm_display_mode *mode;
     char *mode_option;
     int retval = 0;
     char  con_edid[128];
 
-ENTER();
     if((cmdline == NULL) || (*cmdline == 0))
         return EINVAL;
 
@@ -604,8 +589,6 @@ ENTER();
 
     mode_option++;
 
-    __builtin_memset(&cmd_mode, 0, sizeof(cmd_mode));
-
     if( !drm_mode_parse_command_line_for_connector(mode_option, connector, &cmd_mode))
         return EINVAL;
 
@@ -633,10 +616,69 @@ ENTER();
 
     drm_mode_destroy(dev, mode);
 
-LEAVE();
     return retval;
 }
 
+void list_connectors(struct drm_device *dev)
+{
+    struct drm_connector *connector;
+    char  con_edid[128];
+
+    mutex_lock(&dev->mode_config.mutex);
+    list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+    {
+        if( connector->status != connector_status_connected)
+            continue;
+
+        memcpy(con_edid, connector->edid_blob_ptr->data, 128);
+
+        if(connector ==  os_display->connector)
+        {
+            printf("%s mode %dx%d connected %s model %x serial number %u\n",
+                   connector->name, os_display->width, os_display->height,
+                   manufacturer_name(con_edid + 0x08),
+                   (unsigned short)(con_edid[0x0A] + (con_edid[0x0B] << 8)),
+                   (unsigned int)(con_edid[0x0C] + (con_edid[0x0D] << 8)
+                   + (con_edid[0x0E] << 16) + (con_edid[0x0F] << 24)));
+            continue;
+        }
+        else
+        {
+            printf("%s connected: %s model %x serial number %u\n",
+                connector->name, manufacturer_name(con_edid + 0x08),
+                (unsigned short)(con_edid[0x0A] + (con_edid[0x0B] << 8)),
+                (unsigned int)(con_edid[0x0C] + (con_edid[0x0D] << 8)
+                + (con_edid[0x0E] << 16) + (con_edid[0x0F] << 24)));
+        }
+    };
+    mutex_unlock(&dev->mode_config.mutex);
+}
+
+int list_connector_modes(struct drm_device *dev, const char* name)
+{
+    struct drm_connector *connector;
+    struct drm_display_mode  *drmmode;
+
+    mutex_lock(&dev->mode_config.mutex);
+
+    connector = get_cmdline_connector(dev, name);
+    if(connector == NULL)
+    {
+        mutex_unlock(&dev->mode_config.mutex);
+        return EINVAL;
+    };
+
+    printf("connector %s probed modes :\n", connector->name);
+
+    list_for_each_entry(drmmode, &connector->modes, head)
+    {
+        printf("%dx%d@%d\n", drmmode->hdisplay, drmmode->vdisplay, drm_mode_vrefresh(drmmode));
+    };
+
+    mutex_unlock(&dev->mode_config.mutex);
+    return 0;
+};
+
 int get_videomodes(videomode_t *mode, int *count)
 {
     int err = -1;
diff --git a/drivers/video/drm/i915/main.c b/drivers/video/drm/i915/main.c
index 750bedc0ec..394b808399 100644
--- a/drivers/video/drm/i915/main.c
+++ b/drivers/video/drm/i915/main.c
@@ -277,6 +277,7 @@ int do_command_line(const char* usercmd)
     char *cmdline;
     int argc, i, c;
     char **argv;
+    int retval = 0;
 
     if( (usercmd == NULL) || (*usercmd == 0) )
         return 1;
@@ -295,7 +296,9 @@ int do_command_line(const char* usercmd)
     {
         static struct option long_options[] =
         {
-            {"video", required_argument, 0, 'v'},
+            {"list-connectors",      no_argument,       0, OPTION_CONNECTORS},
+            {"list-connector-modes", required_argument, 0, OPTION_CONN_MODES},
+            {"video",                required_argument, 0, 'v'},
             {0, 0, 0, 0}
         };
 
@@ -311,14 +314,22 @@ int do_command_line(const char* usercmd)
         {
             case 'v':
                 printf("cmdline_mode %s\n",optarg);
-                set_cmdline_mode_ext(main_device, optarg);
+                retval = set_cmdline_mode_ext(main_device, optarg);
+                break;
+
+            case OPTION_CONNECTORS:
+                list_connectors(main_device);
+                break;
+
+            case OPTION_CONN_MODES:
+                retval = list_connector_modes(main_device, optarg);
                 break;
         }
     }
     __builtin_free(argv);
     __builtin_free(cmdline);
 
-    return 0;
+    return retval;
 };
 
 #define CURRENT_API     0x0200      /*      2.00     */
@@ -856,31 +867,3 @@ static char* parse_mode(char *p, videomode_t *mode)
     return p;
 };
 
-#include <linux/math64.h>
-
-u64 long_div(u64 dividend, u64 divisor)
-{
-#if 1
-    u32 high = divisor >> 32;
-    u64 quot;
-
-    if (high == 0) {
-            quot = div_u64(dividend, divisor);
-    } else {
-            int n = 1 + fls(high);
-            quot = div_u64(dividend >> n, divisor >> n);
-
-            if (quot != 0)
-                    quot--;
-            if ((dividend - quot * divisor) >= divisor)
-                    quot++;
-    }
-
-    return quot;
-#endif
-//    return dividend / divisor;
-};
-
-
-
-
diff --git a/drivers/video/drm/i915/utils.c b/drivers/video/drm/i915/utils.c
index b18c413068..a241f1c93d 100644
--- a/drivers/video/drm/i915/utils.c
+++ b/drivers/video/drm/i915/utils.c
@@ -973,34 +973,6 @@ int split_cmdline(char *cmdline, char **argv)
     return argc;
 };
 
-char *strstr(const char *cs, const char *ct)
-{
-int d0, d1;
-register char *__res;
-__asm__ __volatile__(
-    "movl %6,%%edi\n\t"
-    "repne\n\t"
-    "scasb\n\t"
-    "notl %%ecx\n\t"
-    "decl %%ecx\n\t"    /* NOTE! This also sets Z if searchstring='' */
-    "movl %%ecx,%%edx\n"
-    "1:\tmovl %6,%%edi\n\t"
-    "movl %%esi,%%eax\n\t"
-    "movl %%edx,%%ecx\n\t"
-    "repe\n\t"
-    "cmpsb\n\t"
-    "je 2f\n\t"     /* also works for empty string, see above */
-    "xchgl %%eax,%%esi\n\t"
-    "incl %%esi\n\t"
-    "cmpb $0,-1(%%eax)\n\t"
-    "jne 1b\n\t"
-    "xorl %%eax,%%eax\n\t"
-    "2:"
-    : "=a" (__res), "=&c" (d0), "=&S" (d1)
-    : "0" (0), "1" (0xffffffff), "2" (cs), "g" (ct)
-    : "dx", "di");
-return __res;
-}
 
 fb_get_options(const char *name, char **option)
 {