Merge branch 'drm-intel-next' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel

* 'drm-intel-next' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel:
  drm/i915: fix scheduling while holding the new active list spinlock
  drm/i915: Allow tiling of objects with bit 17 swizzling by the CPU.
  drm/i915: Correctly set the write flag for get_user_pages in pread.
  drm/i915: Fix use of uninitialized var in 40a5f0de
  drm/i915: indicate framebuffer restore key in SysRq help message
  drm/i915: sync hdmi detection by hdmi identifier with 2D
  drm/i915: Fix a mismerge of the IGD patch (new .find_pll hooks missed)
  drm/i915: Implement batch and ring buffer dumping

drivers/gpu/drm/i915/i915_drv.h

@@ -446,6 +446,9 @@ struct drm_i915_gem_object {
 	uint32_t tiling_mode;
 	uint32_t stride;
 
+	/** Record of address bit 17 of each page at last unbind. */
+	long *bit_17;
+
 	/** AGP mapping type (AGP_USER_MEMORY or AGP_USER_CACHED_MEMORY */
 	uint32_t agp_type;
 
@@ -635,9 +638,13 @@ int i915_gem_attach_phys_object(struct drm_device *dev,
 void i915_gem_detach_phys_object(struct drm_device *dev,
 				 struct drm_gem_object *obj);
 void i915_gem_free_all_phys_object(struct drm_device *dev);
+int i915_gem_object_get_pages(struct drm_gem_object *obj);
+void i915_gem_object_put_pages(struct drm_gem_object *obj);
 
 /* i915_gem_tiling.c */
 void i915_gem_detect_bit_6_swizzle(struct drm_device *dev);
+void i915_gem_object_do_bit_17_swizzle(struct drm_gem_object *obj);
+void i915_gem_object_save_bit_17_swizzle(struct drm_gem_object *obj);
 
 /* i915_gem_debug.c */
 void i915_gem_dump_object(struct drm_gem_object *obj, int len,

drivers/gpu/drm/i915/i915_gem.c

@@ -43,8 +43,6 @@ static int i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj,
 						     uint64_t offset,
 						     uint64_t size);
 static void i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object *obj);
-static int i915_gem_object_get_pages(struct drm_gem_object *obj);
-static void i915_gem_object_put_pages(struct drm_gem_object *obj);
 static int i915_gem_object_wait_rendering(struct drm_gem_object *obj);
 static int i915_gem_object_bind_to_gtt(struct drm_gem_object *obj,
 					   unsigned alignment);
@@ -143,15 +141,27 @@ fast_shmem_read(struct page **pages,
 		int length)
 {
 	char __iomem *vaddr;
-	int ret;
+	int unwritten;
 
 	vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0);
 	if (vaddr == NULL)
 		return -ENOMEM;
-	ret = __copy_to_user_inatomic(data, vaddr + page_offset, length);
+	unwritten = __copy_to_user_inatomic(data, vaddr + page_offset, length);
 	kunmap_atomic(vaddr, KM_USER0);
 
-	return ret;
+	if (unwritten)
+		return -EFAULT;
+
+	return 0;
+}
+
+static int i915_gem_object_needs_bit17_swizzle(struct drm_gem_object *obj)
+{
+	drm_i915_private_t *dev_priv = obj->dev->dev_private;
+	struct drm_i915_gem_object *obj_priv = obj->driver_private;
+
+	return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 &&
+		obj_priv->tiling_mode != I915_TILING_NONE;
 }
 
 static inline int
@@ -181,6 +191,64 @@ slow_shmem_copy(struct page *dst_page,
 	return 0;
 }
 
+static inline int
+slow_shmem_bit17_copy(struct page *gpu_page,
+		      int gpu_offset,
+		      struct page *cpu_page,
+		      int cpu_offset,
+		      int length,
+		      int is_read)
+{
+	char *gpu_vaddr, *cpu_vaddr;
+
+	/* Use the unswizzled path if this page isn't affected. */
+	if ((page_to_phys(gpu_page) & (1 << 17)) == 0) {
+		if (is_read)
+			return slow_shmem_copy(cpu_page, cpu_offset,
+					       gpu_page, gpu_offset, length);
+		else
+			return slow_shmem_copy(gpu_page, gpu_offset,
+					       cpu_page, cpu_offset, length);
+	}
+
+	gpu_vaddr = kmap_atomic(gpu_page, KM_USER0);
+	if (gpu_vaddr == NULL)
+		return -ENOMEM;
+
+	cpu_vaddr = kmap_atomic(cpu_page, KM_USER1);
+	if (cpu_vaddr == NULL) {
+		kunmap_atomic(gpu_vaddr, KM_USER0);
+		return -ENOMEM;
+	}
+
+	/* Copy the data, XORing A6 with A17 (1). The user already knows he's
+	 * XORing with the other bits (A9 for Y, A9 and A10 for X)
+	 */
+	while (length > 0) {
+		int cacheline_end = ALIGN(gpu_offset + 1, 64);
+		int this_length = min(cacheline_end - gpu_offset, length);
+		int swizzled_gpu_offset = gpu_offset ^ 64;
+
+		if (is_read) {
+			memcpy(cpu_vaddr + cpu_offset,
+			       gpu_vaddr + swizzled_gpu_offset,
+			       this_length);
+		} else {
+			memcpy(gpu_vaddr + swizzled_gpu_offset,
+			       cpu_vaddr + cpu_offset,
+			       this_length);
+		}
+		cpu_offset += this_length;
+		gpu_offset += this_length;
+		length -= this_length;
+	}
+
+	kunmap_atomic(cpu_vaddr, KM_USER1);
+	kunmap_atomic(gpu_vaddr, KM_USER0);
+
+	return 0;
+}
+
 /**
  * This is the fast shmem pread path, which attempts to copy_from_user directly
  * from the backing pages of the object to the user's address space.  On a
@@ -269,6 +337,7 @@ i915_gem_shmem_pread_slow(struct drm_device *dev, struct drm_gem_object *obj,
 	int page_length;
 	int ret;
 	uint64_t data_ptr = args->data_ptr;
+	int do_bit17_swizzling;
 
 	remain = args->size;
 
@@ -286,13 +355,15 @@ i915_gem_shmem_pread_slow(struct drm_device *dev, struct drm_gem_object *obj,
 
 	down_read(&mm->mmap_sem);
 	pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr,
-				      num_pages, 0, 0, user_pages, NULL);
+				      num_pages, 1, 0, user_pages, NULL);
 	up_read(&mm->mmap_sem);
 	if (pinned_pages < num_pages) {
 		ret = -EFAULT;
 		goto fail_put_user_pages;
 	}
 
+	do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
+
 	mutex_lock(&dev->struct_mutex);
 
 	ret = i915_gem_object_get_pages(obj);
@@ -327,11 +398,20 @@ i915_gem_shmem_pread_slow(struct drm_device *dev, struct drm_gem_object *obj,
 		if ((data_page_offset + page_length) > PAGE_SIZE)
 			page_length = PAGE_SIZE - data_page_offset;
 
-		ret = slow_shmem_copy(user_pages[data_page_index],
+		if (do_bit17_swizzling) {
-				      data_page_offset,
+			ret = slow_shmem_bit17_copy(obj_priv->pages[shmem_page_index],
-				      obj_priv->pages[shmem_page_index],
+						    shmem_page_offset,
-				      shmem_page_offset,
+						    user_pages[data_page_index],
-				      page_length);
+						    data_page_offset,
+						    page_length,
+						    1);
+		} else {
+			ret = slow_shmem_copy(user_pages[data_page_index],
+					      data_page_offset,
+					      obj_priv->pages[shmem_page_index],
+					      shmem_page_offset,
+					      page_length);
+		}
 		if (ret)
 			goto fail_put_pages;
 
@@ -383,9 +463,14 @@ i915_gem_pread_ioctl(struct drm_device *dev, void *data,
 		return -EINVAL;
 	}
 
-	ret = i915_gem_shmem_pread_fast(dev, obj, args, file_priv);
+	if (i915_gem_object_needs_bit17_swizzle(obj)) {
-	if (ret != 0)
 		ret = i915_gem_shmem_pread_slow(dev, obj, args, file_priv);
+	} else {
+		ret = i915_gem_shmem_pread_fast(dev, obj, args, file_priv);
+		if (ret != 0)
+			ret = i915_gem_shmem_pread_slow(dev, obj, args,
+							file_priv);
+	}
 
 	drm_gem_object_unreference(obj);
 
@@ -727,6 +812,7 @@ i915_gem_shmem_pwrite_slow(struct drm_device *dev, struct drm_gem_object *obj,
 	int page_length;
 	int ret;
 	uint64_t data_ptr = args->data_ptr;
+	int do_bit17_swizzling;
 
 	remain = args->size;
 
@@ -751,6 +837,8 @@ i915_gem_shmem_pwrite_slow(struct drm_device *dev, struct drm_gem_object *obj,
 		goto fail_put_user_pages;
 	}
 
+	do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
+
 	mutex_lock(&dev->struct_mutex);
 
 	ret = i915_gem_object_get_pages(obj);
@@ -785,11 +873,20 @@ i915_gem_shmem_pwrite_slow(struct drm_device *dev, struct drm_gem_object *obj,
 		if ((data_page_offset + page_length) > PAGE_SIZE)
 			page_length = PAGE_SIZE - data_page_offset;
 
-		ret = slow_shmem_copy(obj_priv->pages[shmem_page_index],
+		if (do_bit17_swizzling) {
-				      shmem_page_offset,
+			ret = slow_shmem_bit17_copy(obj_priv->pages[shmem_page_index],
-				      user_pages[data_page_index],
+						    shmem_page_offset,
-				      data_page_offset,
+						    user_pages[data_page_index],
-				      page_length);
+						    data_page_offset,
+						    page_length,
+						    0);
+		} else {
+			ret = slow_shmem_copy(obj_priv->pages[shmem_page_index],
+					      shmem_page_offset,
+					      user_pages[data_page_index],
+					      data_page_offset,
+					      page_length);
+		}
 		if (ret)
 			goto fail_put_pages;
 
@@ -854,6 +951,8 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
 			ret = i915_gem_gtt_pwrite_slow(dev, obj, args,
 						       file_priv);
 		}
+	} else if (i915_gem_object_needs_bit17_swizzle(obj)) {
+		ret = i915_gem_shmem_pwrite_slow(dev, obj, args, file_priv);
 	} else {
 		ret = i915_gem_shmem_pwrite_fast(dev, obj, args, file_priv);
 		if (ret == -EFAULT) {
@@ -1285,7 +1384,7 @@ i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
 	return 0;
 }
 
-static void
+void
 i915_gem_object_put_pages(struct drm_gem_object *obj)
 {
 	struct drm_i915_gem_object *obj_priv = obj->driver_private;
@@ -1297,6 +1396,9 @@ i915_gem_object_put_pages(struct drm_gem_object *obj)
 	if (--obj_priv->pages_refcount != 0)
 		return;
 
+	if (obj_priv->tiling_mode != I915_TILING_NONE)
+		i915_gem_object_save_bit_17_swizzle(obj);
+
 	for (i = 0; i < page_count; i++)
 		if (obj_priv->pages[i] != NULL) {
 			if (obj_priv->dirty)
@@ -1494,8 +1596,19 @@ i915_gem_retire_request(struct drm_device *dev,
 
 		if (obj->write_domain != 0)
 			i915_gem_object_move_to_flushing(obj);
-		else
+		else {
+			/* Take a reference on the object so it won't be
+			 * freed while the spinlock is held.  The list
+			 * protection for this spinlock is safe when breaking
+			 * the lock like this since the next thing we do
+			 * is just get the head of the list again.
+			 */
+			drm_gem_object_reference(obj);
 			i915_gem_object_move_to_inactive(obj);
+			spin_unlock(&dev_priv->mm.active_list_lock);
+			drm_gem_object_unreference(obj);
+			spin_lock(&dev_priv->mm.active_list_lock);
+		}
 	}
 out:
 	spin_unlock(&dev_priv->mm.active_list_lock);
@@ -1884,7 +1997,7 @@ i915_gem_evict_everything(struct drm_device *dev)
 	return ret;
 }
 
-static int
+int
 i915_gem_object_get_pages(struct drm_gem_object *obj)
 {
 	struct drm_i915_gem_object *obj_priv = obj->driver_private;
@@ -1922,6 +2035,10 @@ i915_gem_object_get_pages(struct drm_gem_object *obj)
 		}
 		obj_priv->pages[i] = page;
 	}
+
+	if (obj_priv->tiling_mode != I915_TILING_NONE)
+		i915_gem_object_do_bit_17_swizzle(obj);
+
 	return 0;
 }
 
@@ -3002,13 +3119,13 @@ i915_gem_get_relocs_from_user(struct drm_i915_gem_exec_object *exec_list,
 			drm_free(*relocs, reloc_count * sizeof(**relocs),
 				 DRM_MEM_DRIVER);
 			*relocs = NULL;
-			return ret;
+			return -EFAULT;
 		}
 
 		reloc_index += exec_list[i].relocation_count;
 	}
 
-	return ret;
+	return 0;
 }
 
 static int
@@ -3017,23 +3134,28 @@ i915_gem_put_relocs_to_user(struct drm_i915_gem_exec_object *exec_list,
 			    struct drm_i915_gem_relocation_entry *relocs)
 {
 	uint32_t reloc_count = 0, i;
-	int ret;
+	int ret = 0;
 
 	for (i = 0; i < buffer_count; i++) {
 		struct drm_i915_gem_relocation_entry __user *user_relocs;
+		int unwritten;
 
 		user_relocs = (void __user *)(uintptr_t)exec_list[i].relocs_ptr;
 
-		if (ret == 0) {
+		unwritten = copy_to_user(user_relocs,
-			ret = copy_to_user(user_relocs,
+					 &relocs[reloc_count],
-					   &relocs[reloc_count],
+					 exec_list[i].relocation_count *
-					   exec_list[i].relocation_count *
+					 sizeof(*relocs));
-					   sizeof(*relocs));
+
+		if (unwritten) {
+			ret = -EFAULT;
+			goto err;
 		}
 
 		reloc_count += exec_list[i].relocation_count;
 	}
 
+err:
 	drm_free(relocs, reloc_count * sizeof(*relocs), DRM_MEM_DRIVER);
 
 	return ret;
@@ -3243,7 +3365,7 @@ i915_gem_execbuffer(struct drm_device *dev, void *data,
 	exec_offset = exec_list[args->buffer_count - 1].offset;
 
 #if WATCH_EXEC
-	i915_gem_dump_object(object_list[args->buffer_count - 1],
+	i915_gem_dump_object(batch_obj,
 			      args->batch_len,
 			      __func__,
 			      ~0);
@@ -3308,10 +3430,12 @@ err:
 				   (uintptr_t) args->buffers_ptr,
 				   exec_list,
 				   sizeof(*exec_list) * args->buffer_count);
-		if (ret)
+		if (ret) {
+			ret = -EFAULT;
 			DRM_ERROR("failed to copy %d exec entries "
 				  "back to user (%d)\n",
 				  args->buffer_count, ret);
+		}
 	}
 
 	/* Copy the updated relocations out regardless of current error
@@ -3593,6 +3717,7 @@ void i915_gem_free_object(struct drm_gem_object *obj)
 	i915_gem_free_mmap_offset(obj);
 
 	drm_free(obj_priv->page_cpu_valid, 1, DRM_MEM_DRIVER);
+	kfree(obj_priv->bit_17);
 	drm_free(obj->driver_private, 1, DRM_MEM_DRIVER);
 }
 

drivers/gpu/drm/i915/i915_gem_debugfs.c

@@ -234,6 +234,96 @@ static int i915_hws_info(struct seq_file *m, void *data)
 	return 0;
 }
 
+static void i915_dump_pages(struct seq_file *m, struct page **pages, int page_count)
+{
+	int page, i;
+	uint32_t *mem;
+
+	for (page = 0; page < page_count; page++) {
+		mem = kmap(pages[page]);
+		for (i = 0; i < PAGE_SIZE; i += 4)
+			seq_printf(m, "%08x :  %08x\n", i, mem[i / 4]);
+		kunmap(pages[page]);
+	}
+}
+
+static int i915_batchbuffer_info(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct drm_device *dev = node->minor->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct drm_gem_object *obj;
+	struct drm_i915_gem_object *obj_priv;
+	int ret;
+
+	spin_lock(&dev_priv->mm.active_list_lock);
+
+	list_for_each_entry(obj_priv, &dev_priv->mm.active_list, list) {
+		obj = obj_priv->obj;
+		if (obj->read_domains & I915_GEM_DOMAIN_COMMAND) {
+		    ret = i915_gem_object_get_pages(obj);
+		    if (ret) {
+			    DRM_ERROR("Failed to get pages: %d\n", ret);
+			    spin_unlock(&dev_priv->mm.active_list_lock);
+			    return ret;
+		    }
+
+		    seq_printf(m, "--- gtt_offset = 0x%08x\n", obj_priv->gtt_offset);
+		    i915_dump_pages(m, obj_priv->pages, obj->size / PAGE_SIZE);
+
+		    i915_gem_object_put_pages(obj);
+		}
+	}
+
+	spin_unlock(&dev_priv->mm.active_list_lock);
+
+	return 0;
+}
+
+static int i915_ringbuffer_data(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct drm_device *dev = node->minor->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	u8 *virt;
+	uint32_t *ptr, off;
+
+	if (!dev_priv->ring.ring_obj) {
+		seq_printf(m, "No ringbuffer setup\n");
+		return 0;
+	}
+
+	virt = dev_priv->ring.virtual_start;
+
+	for (off = 0; off < dev_priv->ring.Size; off += 4) {
+		ptr = (uint32_t *)(virt + off);
+		seq_printf(m, "%08x :  %08x\n", off, *ptr);
+	}
+
+	return 0;
+}
+
+static int i915_ringbuffer_info(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct drm_device *dev = node->minor->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	unsigned int head, tail, mask;
+
+	head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
+	tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
+	mask = dev_priv->ring.tail_mask;
+
+	seq_printf(m, "RingHead :  %08x\n", head);
+	seq_printf(m, "RingTail :  %08x\n", tail);
+	seq_printf(m, "RingMask :  %08x\n", mask);
+	seq_printf(m, "RingSize :  %08lx\n", dev_priv->ring.Size);
+	seq_printf(m, "Acthd :  %08x\n", I915_READ(IS_I965G(dev) ? ACTHD_I965 : ACTHD));
+
+	return 0;
+}
+
+
 static struct drm_info_list i915_gem_debugfs_list[] = {
 	{"i915_gem_active", i915_gem_object_list_info, 0, (void *) ACTIVE_LIST},
 	{"i915_gem_flushing", i915_gem_object_list_info, 0, (void *) FLUSHING_LIST},
@@ -243,6 +333,9 @@ static struct drm_info_list i915_gem_debugfs_list[] = {
 	{"i915_gem_fence_regs", i915_gem_fence_regs_info, 0},
 	{"i915_gem_interrupt", i915_interrupt_info, 0},
 	{"i915_gem_hws", i915_hws_info, 0},
+	{"i915_ringbuffer_data", i915_ringbuffer_data, 0},
+	{"i915_ringbuffer_info", i915_ringbuffer_info, 0},
+	{"i915_batchbuffers", i915_batchbuffer_info, 0},
 };
 #define I915_GEM_DEBUGFS_ENTRIES ARRAY_SIZE(i915_gem_debugfs_list)
 

drivers/gpu/drm/i915/i915_gem_tiling.c

@@ -25,6 +25,8 @@
  *
  */
 
+#include "linux/string.h"
+#include "linux/bitops.h"
 #include "drmP.h"
 #include "drm.h"
 #include "i915_drm.h"
@@ -127,8 +129,8 @@ i915_gem_detect_bit_6_swizzle(struct drm_device *dev)
 				swizzle_y = I915_BIT_6_SWIZZLE_9_11;
 			} else {
 				/* Bit 17 swizzling by the CPU in addition. */
-				swizzle_x = I915_BIT_6_SWIZZLE_UNKNOWN;
+				swizzle_x = I915_BIT_6_SWIZZLE_9_10_17;
-				swizzle_y = I915_BIT_6_SWIZZLE_UNKNOWN;
+				swizzle_y = I915_BIT_6_SWIZZLE_9_17;
 			}
 			break;
 		}
@@ -288,6 +290,19 @@ i915_gem_set_tiling(struct drm_device *dev, void *data,
 			args->swizzle_mode = dev_priv->mm.bit_6_swizzle_x;
 		else
 			args->swizzle_mode = dev_priv->mm.bit_6_swizzle_y;
+
+		/* Hide bit 17 swizzling from the user.  This prevents old Mesa
+		 * from aborting the application on sw fallbacks to bit 17,
+		 * and we use the pread/pwrite bit17 paths to swizzle for it.
+		 * If there was a user that was relying on the swizzle
+		 * information for drm_intel_bo_map()ed reads/writes this would
+		 * break it, but we don't have any of those.
+		 */
+		if (args->swizzle_mode == I915_BIT_6_SWIZZLE_9_17)
+			args->swizzle_mode = I915_BIT_6_SWIZZLE_9;
+		if (args->swizzle_mode == I915_BIT_6_SWIZZLE_9_10_17)
+			args->swizzle_mode = I915_BIT_6_SWIZZLE_9_10;
+
 		/* If we can't handle the swizzling, make it untiled. */
 		if (args->swizzle_mode == I915_BIT_6_SWIZZLE_UNKNOWN) {
 			args->tiling_mode = I915_TILING_NONE;
@@ -354,8 +369,100 @@ i915_gem_get_tiling(struct drm_device *dev, void *data,
 		DRM_ERROR("unknown tiling mode\n");
 	}
 
+	/* Hide bit 17 from the user -- see comment in i915_gem_set_tiling */
+	if (args->swizzle_mode == I915_BIT_6_SWIZZLE_9_17)
+		args->swizzle_mode = I915_BIT_6_SWIZZLE_9;
+	if (args->swizzle_mode == I915_BIT_6_SWIZZLE_9_10_17)
+		args->swizzle_mode = I915_BIT_6_SWIZZLE_9_10;
+
 	drm_gem_object_unreference(obj);
 	mutex_unlock(&dev->struct_mutex);
 
 	return 0;
 }
+
+/**
+ * Swap every 64 bytes of this page around, to account for it having a new
+ * bit 17 of its physical address and therefore being interpreted differently
+ * by the GPU.
+ */
+static int
+i915_gem_swizzle_page(struct page *page)
+{
+	char *vaddr;
+	int i;
+	char temp[64];
+
+	vaddr = kmap(page);
+	if (vaddr == NULL)
+		return -ENOMEM;
+
+	for (i = 0; i < PAGE_SIZE; i += 128) {
+		memcpy(temp, &vaddr[i], 64);
+		memcpy(&vaddr[i], &vaddr[i + 64], 64);
+		memcpy(&vaddr[i + 64], temp, 64);
+	}
+
+	kunmap(page);
+
+	return 0;
+}
+
+void
+i915_gem_object_do_bit_17_swizzle(struct drm_gem_object *obj)
+{
+	struct drm_device *dev = obj->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct drm_i915_gem_object *obj_priv = obj->driver_private;
+	int page_count = obj->size >> PAGE_SHIFT;
+	int i;
+
+	if (dev_priv->mm.bit_6_swizzle_x != I915_BIT_6_SWIZZLE_9_10_17)
+		return;
+
+	if (obj_priv->bit_17 == NULL)
+		return;
+
+	for (i = 0; i < page_count; i++) {
+		char new_bit_17 = page_to_phys(obj_priv->pages[i]) >> 17;
+		if ((new_bit_17 & 0x1) !=
+		    (test_bit(i, obj_priv->bit_17) != 0)) {
+			int ret = i915_gem_swizzle_page(obj_priv->pages[i]);
+			if (ret != 0) {
+				DRM_ERROR("Failed to swizzle page\n");
+				return;
+			}
+			set_page_dirty(obj_priv->pages[i]);
+		}
+	}
+}
+
+void
+i915_gem_object_save_bit_17_swizzle(struct drm_gem_object *obj)
+{
+	struct drm_device *dev = obj->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct drm_i915_gem_object *obj_priv = obj->driver_private;
+	int page_count = obj->size >> PAGE_SHIFT;
+	int i;
+
+	if (dev_priv->mm.bit_6_swizzle_x != I915_BIT_6_SWIZZLE_9_10_17)
+		return;
+
+	if (obj_priv->bit_17 == NULL) {
+		obj_priv->bit_17 = kmalloc(BITS_TO_LONGS(page_count) *
+					   sizeof(long), GFP_KERNEL);
+		if (obj_priv->bit_17 == NULL) {
+			DRM_ERROR("Failed to allocate memory for bit 17 "
+				  "record\n");
+			return;
+		}
+	}
+
+	for (i = 0; i < page_count; i++) {
+		if (page_to_phys(obj_priv->pages[i]) & (1 << 17))
+			__set_bit(i, obj_priv->bit_17);
+		else
+			__clear_bit(i, obj_priv->bit_17);
+	}
+}

drivers/gpu/drm/i915/intel_display.c

@@ -367,6 +367,7 @@ static const intel_limit_t intel_limits[] = {
         .p1  = { .min = I9XX_P1_MIN,		.max = I9XX_P1_MAX },
 	.p2  = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
 		 .p2_slow = I9XX_P2_SDVO_DAC_SLOW,	.p2_fast = I9XX_P2_SDVO_DAC_FAST },
+	.find_pll = intel_find_best_PLL,
     },
     { /* INTEL_LIMIT_IGD_LVDS */
         .dot = { .min = I9XX_DOT_MIN,		.max = I9XX_DOT_MAX },
@@ -380,6 +381,7 @@ static const intel_limit_t intel_limits[] = {
 	/* IGD only supports single-channel mode. */
 	.p2  = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
 		 .p2_slow = I9XX_P2_LVDS_SLOW,	.p2_fast = I9XX_P2_LVDS_SLOW },
+	.find_pll = intel_find_best_PLL,
     },
 
 };

drivers/gpu/drm/i915/intel_fb.c

@@ -864,8 +864,8 @@ static void intelfb_sysrq(int dummy1, struct tty_struct *dummy3)
 
 static struct sysrq_key_op sysrq_intelfb_restore_op = {
         .handler = intelfb_sysrq,
-        .help_msg = "force fb",
+        .help_msg = "force-fb(G)",
-        .action_msg = "force restore of fb console",
+        .action_msg = "Restore framebuffer console",
 };
 
 int intelfb_probe(struct drm_device *dev)

drivers/gpu/drm/i915/intel_hdmi.c

@@ -38,7 +38,7 @@
 struct intel_hdmi_priv {
 	u32 sdvox_reg;
 	u32 save_SDVOX;
-	int has_hdmi_sink;
+	bool has_hdmi_sink;
 };
 
 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
@@ -128,6 +128,22 @@ static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 	return true;
 }
 
+static void
+intel_hdmi_sink_detect(struct drm_connector *connector)
+{
+	struct intel_output *intel_output = to_intel_output(connector);
+	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
+	struct edid *edid = NULL;
+
+	edid = drm_get_edid(&intel_output->base,
+			    &intel_output->ddc_bus->adapter);
+	if (edid != NULL) {
+		hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
+		kfree(edid);
+		intel_output->base.display_info.raw_edid = NULL;
+	}
+}
+
 static enum drm_connector_status
 intel_hdmi_detect(struct drm_connector *connector)
 {
@@ -158,9 +174,10 @@ intel_hdmi_detect(struct drm_connector *connector)
 		return connector_status_unknown;
 	}
 
-	if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0)
+	if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0) {
+		intel_hdmi_sink_detect(connector);
 		return connector_status_connected;
-	else
+	} else
 		return connector_status_disconnected;
 }
 

drivers/gpu/drm/i915/intel_sdvo.c

@@ -1357,6 +1357,23 @@ void intel_sdvo_set_hotplug(struct drm_connector *connector, int on)
 	intel_sdvo_read_response(intel_output, &response, 2);
 }
 
+static void
+intel_sdvo_hdmi_sink_detect(struct drm_connector *connector)
+{
+	struct intel_output *intel_output = to_intel_output(connector);
+	struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
+	struct edid *edid = NULL;
+
+	intel_sdvo_set_control_bus_switch(intel_output, sdvo_priv->ddc_bus);
+	edid = drm_get_edid(&intel_output->base,
+			    &intel_output->ddc_bus->adapter);
+	if (edid != NULL) {
+		sdvo_priv->is_hdmi = drm_detect_hdmi_monitor(edid);
+		kfree(edid);
+		intel_output->base.display_info.raw_edid = NULL;
+	}
+}
+
 static enum drm_connector_status intel_sdvo_detect(struct drm_connector *connector)
 {
 	u8 response[2];
@@ -1371,9 +1388,10 @@ static enum drm_connector_status intel_sdvo_detect(struct drm_connector *connect
 	if (status != SDVO_CMD_STATUS_SUCCESS)
 		return connector_status_unknown;
 
-	if ((response[0] != 0) || (response[1] != 0))
+	if ((response[0] != 0) || (response[1] != 0)) {
+		intel_sdvo_hdmi_sink_detect(connector);
 		return connector_status_connected;
-	else
+	} else
 		return connector_status_disconnected;
 }
 

include/drm/i915_drm.h

@@ -594,6 +594,9 @@ struct drm_i915_gem_busy {
 #define I915_BIT_6_SWIZZLE_9_10_11	4
 /* Not seen by userland */
 #define I915_BIT_6_SWIZZLE_UNKNOWN	5
+/* Seen by userland. */
+#define I915_BIT_6_SWIZZLE_9_17		6
+#define I915_BIT_6_SWIZZLE_9_10_17	7
 
 struct drm_i915_gem_set_tiling {
 	/** Handle of the buffer to have its tiling state updated */