Merge tag 'drm/tegra/for-3.10' of git://anongit.freedesktop.org/tegra/linux into drm-next

drm/tegra: Changes for v3.10-rc1

The bulk of this pull-request is the host1x series that has been in the
works for a few months. The current implementation looks good and has
been tested by several independent parties. So far no issues have been
found. To be on the safe side, the new Tegra-specific DRM IOCTLs depend
on staging in order to give some amount of flexibility to change them
just in case. The plan is to remove that dependency once more userspace
exists to verify the adequacy of the IOCTLs.

Currently only the 2D engine is supported, but patches are in the works
to enable 3D support on top of this framework as well. Various bits of
open-source userspace exist to test the 2D and 3D support[0]. This is
still a bit immature but it allows to verify that the kernel interfaces
work properly.

To round things off there are two smaller cleanup patches, one of them
adding a new pixel format and the other removing a redundent Kconfig
dependency.

[0]: https://github.com/grate-driver

* tag 'drm/tegra/for-3.10' of git://anongit.freedesktop.org/tegra/linux:
  drm/tegra: don't depend on OF
  drm/tegra: Support the XBGR8888 pixelformat
  drm/tegra: Add gr2d device
  gpu: host1x: drm: Add memory manager and fb
  gpu: host1x: Remove second host1x driver
  gpu: host1x: drm: Rename host1x to host1x_drm
  drm/tegra: Move drm to live under host1x
  gpu: host1x: Add debug support
  gpu: host1x: Add channel support
  gpu: host1x: Add syncpoint wait and interrupts
  gpu: host1x: Add host1x driver

1 files changed, 102 insertions, 0 deletions

diff --git a/drivers/gpu/host1x/intr.h b/drivers/gpu/host1x/intr.h
new file mode 100644
index 000000000000..2b8adf016a05
--- /dev/null
+++ b/drivers/gpu/host1x/intr.h
@@ -0,0 +1,102 @@
+/*
+ * Tegra host1x Interrupt Management
+ *
+ * Copyright (c) 2010-2013, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __HOST1X_INTR_H
+#define __HOST1X_INTR_H
+
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+
+struct host1x;
+
+enum host1x_intr_action {
+	/*
+	 * Perform cleanup after a submit has completed.
+	 * 'data' points to a channel
+	 */
+	HOST1X_INTR_ACTION_SUBMIT_COMPLETE = 0,
+
+	/*
+	 * Wake up a  task.
+	 * 'data' points to a wait_queue_head_t
+	 */
+	HOST1X_INTR_ACTION_WAKEUP,
+
+	/*
+	 * Wake up a interruptible task.
+	 * 'data' points to a wait_queue_head_t
+	 */
+	HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
+
+	HOST1X_INTR_ACTION_COUNT
+};
+
+struct host1x_syncpt_intr {
+	spinlock_t lock;
+	struct list_head wait_head;
+	char thresh_irq_name[12];
+	struct work_struct work;
+};
+
+struct host1x_waitlist {
+	struct list_head list;
+	struct kref refcount;
+	u32 thresh;
+	enum host1x_intr_action action;
+	atomic_t state;
+	void *data;
+	int count;
+};
+
+/*
+ * Schedule an action to be taken when a sync point reaches the given threshold.
+ *
+ * @id the sync point
+ * @thresh the threshold
+ * @action the action to take
+ * @data a pointer to extra data depending on action, see above
+ * @waiter waiter structure - assumes ownership
+ * @ref must be passed if cancellation is possible, else NULL
+ *
+ * This is a non-blocking api.
+ */
+int host1x_intr_add_action(struct host1x *host, u32 id, u32 thresh,
+	enum host1x_intr_action action, void *data,
+	struct host1x_waitlist *waiter, void **ref);
+
+/*
+ * Unreference an action submitted to host1x_intr_add_action().
+ * You must call this if you passed non-NULL as ref.
+ * @ref the ref returned from host1x_intr_add_action()
+ */
+void host1x_intr_put_ref(struct host1x *host, u32 id, void *ref);
+
+/* Initialize host1x sync point interrupt */
+int host1x_intr_init(struct host1x *host, unsigned int irq_sync);
+
+/* Deinitialize host1x sync point interrupt */
+void host1x_intr_deinit(struct host1x *host);
+
+/* Enable host1x sync point interrupt */
+void host1x_intr_start(struct host1x *host);
+
+/* Disable host1x sync point interrupt */
+void host1x_intr_stop(struct host1x *host);
+
+irqreturn_t host1x_syncpt_thresh_fn(void *dev_id);
+#endif