Merge tag 'topic/drm-misc-2016-05-04' of git://anongit.freedesktop.org/drm-intel into drm-next

Ofc I promise just a few leftovers for drm-misc and somehow it's the
biggest pull. But really mostly trivial stuff:
- MAINTAINERS updates from Emil
- rename async to nonblock in atomic_commit to avoid the confusion between
  nonblocking ioctl and async flip (= not vblank synced), from Maarten.
  Needs to be regened with newer drivers, but probably only after -rc1 to
  catch them all.
- actually lockless gem_object_free, plus acked driver conversion patches.
  All the trickier prep stuff already is in drm-next.
- Noralf's nice work for generic defio support in our fbdev emulation.
  Keeps the udl hack, and qxl is tested by Gerd.

* tag 'topic/drm-misc-2016-05-04' of git://anongit.freedesktop.org/drm-intel: (47 commits)
  drm: Fixup locking WARN_ON mistake around gem_object_free_unlocked
  drm/etnaviv: Use lockless gem BO free callback
  drm/imx: Use lockless gem BO free callback
  drm/radeon: Use lockless gem BO free callback
  drm/amdgpu: Use lockless gem BO free callback
  drm/gem: support BO freeing without dev->struct_mutex
  MAINTAINERS: Add myself for the new VC4 (RPi GPU) graphics driver.
  MAINTAINERS: Add a bunch of legacy (UMS) DRM drivers
  MAINTAINERS: Add a few DRM drivers by Dave Airlie
  MAINTAINERS: List the correct git repo for the Renesas DRM drivers
  MAINTAINERS: Update the files list for the Renesas DRM drivers
  MAINTAINERS: Update the files list for the Armada DRM driver
  MAINTAINERS: Update the files list for the Rockchip DRM driver
  MAINTAINERS: Update the files list for the Exynos DRM driver
  MAINTAINERS: Add maintainer entry for the VMWGFX DRM driver
  MAINTAINERS: Add maintainer entry for the MSM DRM driver
  MAINTAINERS: Add maintainer entry for the Nouveau DRM driver
  MAINTAINERS: Update the files list for the Etnaviv DRM driver
  MAINTAINERS: Remove unneded wildcard for the i915 DRM driver
  drm/atomic: Add WARN_ON when state->acquire_ctx is not set.
  ...

7 files changed, 62 insertions, 42 deletions

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 7901768..360b2a7 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -580,12 +580,21 @@ struct drm_driver {
 	void (*debugfs_cleanup)(struct drm_minor *minor);
 
 	/**
-	 * Driver-specific constructor for drm_gem_objects, to set up
-	 * obj->driver_private.
+	 * @gem_free_object: deconstructor for drm_gem_objects
 	 *
-	 * Returns 0 on success.
+	 * This is deprecated and should not be used by new drivers. Use
+	 * @gem_free_object_unlocked instead.
 	 */
 	void (*gem_free_object) (struct drm_gem_object *obj);
+
+	/**
+	 * @gem_free_object_unlocked: deconstructor for drm_gem_objects
+	 *
+	 * This is for drivers which are not encumbered with dev->struct_mutex
+	 * legacy locking schemes. Use this hook instead of @gem_free_object.
+	 */
+	void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
+
 	int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
 	void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
 
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index d3eaa5d..92c84e9 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -137,7 +137,7 @@ drm_atomic_clean_old_fb(struct drm_device *dev, unsigned plane_mask, int ret);
 
 int __must_check drm_atomic_check_only(struct drm_atomic_state *state);
 int __must_check drm_atomic_commit(struct drm_atomic_state *state);
-int __must_check drm_atomic_async_commit(struct drm_atomic_state *state);
+int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state);
 
 #define for_each_connector_in_state(state, connector, connector_state, __i) \
 	for ((__i) = 0;							\
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index fe9d89c..0364287 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -40,7 +40,7 @@ int drm_atomic_helper_check(struct drm_device *dev,
 			    struct drm_atomic_state *state);
 int drm_atomic_helper_commit(struct drm_device *dev,
 			     struct drm_atomic_state *state,
-			     bool async);
+			     bool nonblock);
 
 void drm_atomic_helper_wait_for_fences(struct drm_device *dev,
 					struct drm_atomic_state *state);
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 297e527..2f2bf23 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1886,7 +1886,7 @@ struct drm_mode_config_funcs {
 	 * drm_atomic_helper_commit(), or one of the exported sub-functions of
 	 * it.
 	 *
-	 * Asynchronous commits (as indicated with the async parameter) must
+	 * Nonblocking commits (as indicated with the nonblock parameter) must
 	 * do any preparatory work which might result in an unsuccessful commit
 	 * in the context of this callback. The only exceptions are hardware
 	 * errors resulting in -EIO. But even in that case the driver must
@@ -1899,7 +1899,7 @@ struct drm_mode_config_funcs {
 	 * The driver must wait for any pending rendering to the new
 	 * framebuffers to complete before executing the flip. It should also
 	 * wait for any pending rendering from other drivers if the underlying
-	 * buffer is a shared dma-buf. Asynchronous commits must not wait for
+	 * buffer is a shared dma-buf. Nonblocking commits must not wait for
 	 * rendering in the context of this callback.
 	 *
 	 * An application can request to be notified when the atomic commit has
@@ -1930,7 +1930,7 @@ struct drm_mode_config_funcs {
 	 *
 	 * 0 on success or one of the below negative error codes:
 	 *
-	 *  - -EBUSY, if an asynchronous updated is requested and there is
+	 *  - -EBUSY, if a nonblocking updated is requested and there is
 	 *    an earlier updated pending. Drivers are allowed to support a queue
 	 *    of outstanding updates, but currently no driver supports that.
 	 *    Note that drivers must wait for preceding updates to complete if a
@@ -1960,7 +1960,7 @@ struct drm_mode_config_funcs {
 	 */
 	int (*atomic_commit)(struct drm_device *dev,
 			     struct drm_atomic_state *state,
-			     bool async);
+			     bool nonblock);
 
 	/**
 	 * @atomic_state_alloc:
diff --git a/include/drm/drm_fb_cma_helper.h b/include/drm/drm_fb_cma_helper.h
index ae49c24..c6d9c9c 100644
--- a/include/drm/drm_fb_cma_helper.h
+++ b/include/drm/drm_fb_cma_helper.h
@@ -4,11 +4,18 @@
 struct drm_fbdev_cma;
 struct drm_gem_cma_object;
 
+struct drm_fb_helper_surface_size;
+struct drm_framebuffer_funcs;
+struct drm_fb_helper_funcs;
 struct drm_framebuffer;
+struct drm_fb_helper;
 struct drm_device;
 struct drm_file;
 struct drm_mode_fb_cmd2;
 
+struct drm_fbdev_cma *drm_fbdev_cma_init_with_funcs(struct drm_device *dev,
+	unsigned int preferred_bpp, unsigned int num_crtc,
+	unsigned int max_conn_count, const struct drm_fb_helper_funcs *funcs);
 struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
 	unsigned int preferred_bpp, unsigned int num_crtc,
 	unsigned int max_conn_count);
@@ -16,6 +23,13 @@ void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma);
 
 void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma);
 void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma);
+int drm_fbdev_cma_create_with_funcs(struct drm_fb_helper *helper,
+	struct drm_fb_helper_surface_size *sizes,
+	struct drm_framebuffer_funcs *funcs);
+
+void drm_fb_cma_destroy(struct drm_framebuffer *fb);
+int drm_fb_cma_create_handle(struct drm_framebuffer *fb,
+	struct drm_file *file_priv, unsigned int *handle);
 
 struct drm_framebuffer *drm_fb_cma_create(struct drm_device *dev,
 	struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd);
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 062723b..5b4aa35 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -172,6 +172,10 @@ struct drm_fb_helper_connector {
  * @funcs: driver callbacks for fb helper
  * @fbdev: emulated fbdev device info struct
  * @pseudo_palette: fake palette of 16 colors
+ * @dirty_clip: clip rectangle used with deferred_io to accumulate damage to
+ *              the screen buffer
+ * @dirty_lock: spinlock protecting @dirty_clip
+ * @dirty_work: worker used to flush the framebuffer
  *
  * This is the main structure used by the fbdev helpers. Drivers supporting
  * fbdev emulation should embedded this into their overall driver structure.
@@ -189,6 +193,9 @@ struct drm_fb_helper {
 	const struct drm_fb_helper_funcs *funcs;
 	struct fb_info *fbdev;
 	u32 pseudo_palette[17];
+	struct drm_clip_rect dirty_clip;
+	spinlock_t dirty_lock;
+	struct work_struct dirty_work;
 
 	/**
 	 * @kernel_fb_list:
@@ -245,6 +252,9 @@ void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
 
 void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);
 
+void drm_fb_helper_deferred_io(struct fb_info *info,
+			       struct list_head *pagelist);
+
 ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
 			       size_t count, loff_t *ppos);
 ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
@@ -368,6 +378,11 @@ static inline void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper)
 {
 }
 
+static inline void drm_fb_helper_deferred_io(struct fb_info *info,
+					     struct list_head *pagelist)
+{
+}
+
 static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,
 					     char __user *buf, size_t count,
 					     loff_t *ppos)
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index 0b3e11a..408d6c4 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -200,47 +200,29 @@ drm_gem_object_reference(struct drm_gem_object *obj)
 }
 
 /**
- * drm_gem_object_unreference - release a GEM BO reference
+ * __drm_gem_object_unreference - raw function to release a GEM BO reference
  * @obj: GEM buffer object
  *
- * This releases a reference to @obj. Callers must hold the dev->struct_mutex
- * lock when calling this function, even when the driver doesn't use
- * dev->struct_mutex for anything.
+ * This function is meant to be used by drivers which are not encumbered with
+ * dev->struct_mutex legacy locking and which are using the
+ * gem_free_object_unlocked callback. It avoids all the locking checks and
+ * locking overhead of drm_gem_object_unreference() and
+ * drm_gem_object_unreference_unlocked().
  *
- * For drivers not encumbered with legacy locking use
- * drm_gem_object_unreference_unlocked() instead.
+ * Drivers should never call this directly in their code. Instead they should
+ * wrap it up into a driver_gem_object_unreference(struct driver_gem_object
+ * *obj) wrapper function, and use that. Shared code should never call this, to
+ * avoid breaking drivers by accident which still depend upon dev->struct_mutex
+ * locking.
  */
 static inline void
-drm_gem_object_unreference(struct drm_gem_object *obj)
+__drm_gem_object_unreference(struct drm_gem_object *obj)
 {
-	if (obj != NULL) {
-		WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
-
-		kref_put(&obj->refcount, drm_gem_object_free);
-	}
+	kref_put(&obj->refcount, drm_gem_object_free);
 }
 
-/**
- * drm_gem_object_unreference_unlocked - release a GEM BO reference
- * @obj: GEM buffer object
- *
- * This releases a reference to @obj. Callers must not hold the
- * dev->struct_mutex lock when calling this function.
- */
-static inline void
-drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
-{
-	struct drm_device *dev;
-
-	if (!obj)
-		return;
-
-	dev = obj->dev;
-	if (kref_put_mutex(&obj->refcount, drm_gem_object_free, &dev->struct_mutex))
-		mutex_unlock(&dev->struct_mutex);
-	else
-		might_lock(&dev->struct_mutex);
-}
+void drm_gem_object_unreference_unlocked(struct drm_gem_object *obj);
+void drm_gem_object_unreference(struct drm_gem_object *obj);
 
 int drm_gem_handle_create(struct drm_file *file_priv,
 			  struct drm_gem_object *obj,