Merge tag 'drm-misc-next-2023-12-07' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 6.8:

UAPI Changes:
  - Remove Userspace Mode-Setting ioctls
  - v3d: New uapi to handle jobs involving the CPU

Cross-subsystem Changes:

Core Changes:
  - atomic: Add support for FB-less planes which got reverted a bit
    later for lack of IGT tests and userspace code, Dump private objects
    state in drm_state_dump.
  - dma-buf: Add fence deadline support
  - encoder: Create per-encoder debugfs directory, move the bridge chain
    file to that directory

Driver Changes:
  - Include drm_auth.h in driver that use it but don't include it, Drop
    drm_plane_helper.h from drivers that include it but don't use it
  - imagination: Plenty of small fixes
  - panfrost: Improve interrupt handling at poweroff
  - qaic: Convert to persistent DRM devices
  - tidss: Support for the AM62A7, a few probe improvements, some cleanups
  - v3d: Support for jobs involving the CPU

  - bridge:
    - Create transparent aux-bridge for DP/USB-C
    - lt8912b: Add suspend/resume support and power regulator support

  - panel:
    - himax-hx8394: Drop prepare, unprepare and shutdown logic, Support
      panel rotation
    - New panels: BOE BP101WX1-100, Powkiddy X55, Ampire AM8001280G,
      Evervision VGG644804, SDC ATNA45AF01

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <mripard@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/yu5heqaufyeo4nlowzieu4s5unwqrqyx4jixbfjmzdon677rpk@t53vceua2dao

4 files changed, 105 insertions, 1 deletions

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 8aa8f8cb7071..e0fd99e61a2d 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -934,7 +934,8 @@ EXPORT_SYMBOL(dma_fence_wait_any_timeout);
  *   the GPU's devfreq to reduce frequency, when in fact the opposite is what is
  *   needed.
  *
- * To this end, deadline hint(s) can be set on a &dma_fence via &dma_fence_set_deadline.
+ * To this end, deadline hint(s) can be set on a &dma_fence via &dma_fence_set_deadline
+ * (or indirectly via userspace facing ioctls like &sync_set_deadline).
  * The deadline hint provides a way for the waiting driver, or userspace, to
  * convey an appropriate sense of urgency to the signaling driver.
  *
diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c
index f0a35277fd84..c353029789cf 100644
--- a/drivers/dma-buf/sw_sync.c
+++ b/drivers/dma-buf/sw_sync.c
@@ -52,12 +52,33 @@ struct sw_sync_create_fence_data {
 	__s32	fence; /* fd of new fence */
 };
 
+/**
+ * struct sw_sync_get_deadline - get the deadline hint of a sw_sync fence
+ * @deadline_ns: absolute time of the deadline
+ * @pad:	must be zero
+ * @fence_fd:	the sw_sync fence fd (in)
+ *
+ * Return the earliest deadline set on the fence.  The timebase for the
+ * deadline is CLOCK_MONOTONIC (same as vblank).  If there is no deadline
+ * set on the fence, this ioctl will return -ENOENT.
+ */
+struct sw_sync_get_deadline {
+	__u64	deadline_ns;
+	__u32	pad;
+	__s32	fence_fd;
+};
+
 #define SW_SYNC_IOC_MAGIC	'W'
 
 #define SW_SYNC_IOC_CREATE_FENCE	_IOWR(SW_SYNC_IOC_MAGIC, 0,\
 		struct sw_sync_create_fence_data)
 
 #define SW_SYNC_IOC_INC			_IOW(SW_SYNC_IOC_MAGIC, 1, __u32)
+#define SW_SYNC_GET_DEADLINE		_IOWR(SW_SYNC_IOC_MAGIC, 2, \
+		struct sw_sync_get_deadline)
+
+
+#define SW_SYNC_HAS_DEADLINE_BIT	DMA_FENCE_FLAG_USER_BITS
 
 static const struct dma_fence_ops timeline_fence_ops;
 
@@ -171,6 +192,22 @@ static void timeline_fence_timeline_value_str(struct dma_fence *fence,
 	snprintf(str, size, "%d", parent->value);
 }
 
+static void timeline_fence_set_deadline(struct dma_fence *fence, ktime_t deadline)
+{
+	struct sync_pt *pt = dma_fence_to_sync_pt(fence);
+	unsigned long flags;
+
+	spin_lock_irqsave(fence->lock, flags);
+	if (test_bit(SW_SYNC_HAS_DEADLINE_BIT, &fence->flags)) {
+		if (ktime_before(deadline, pt->deadline))
+			pt->deadline = deadline;
+	} else {
+		pt->deadline = deadline;
+		__set_bit(SW_SYNC_HAS_DEADLINE_BIT, &fence->flags);
+	}
+	spin_unlock_irqrestore(fence->lock, flags);
+}
+
 static const struct dma_fence_ops timeline_fence_ops = {
 	.get_driver_name = timeline_fence_get_driver_name,
 	.get_timeline_name = timeline_fence_get_timeline_name,
@@ -179,6 +216,7 @@ static const struct dma_fence_ops timeline_fence_ops = {
 	.release = timeline_fence_release,
 	.fence_value_str = timeline_fence_value_str,
 	.timeline_value_str = timeline_fence_timeline_value_str,
+	.set_deadline = timeline_fence_set_deadline,
 };
 
 /**
@@ -387,6 +425,47 @@ static long sw_sync_ioctl_inc(struct sync_timeline *obj, unsigned long arg)
 	return 0;
 }
 
+static int sw_sync_ioctl_get_deadline(struct sync_timeline *obj, unsigned long arg)
+{
+	struct sw_sync_get_deadline data;
+	struct dma_fence *fence;
+	unsigned long flags;
+	struct sync_pt *pt;
+	int ret = 0;
+
+	if (copy_from_user(&data, (void __user *)arg, sizeof(data)))
+		return -EFAULT;
+
+	if (data.deadline_ns || data.pad)
+		return -EINVAL;
+
+	fence = sync_file_get_fence(data.fence_fd);
+	if (!fence)
+		return -EINVAL;
+
+	pt = dma_fence_to_sync_pt(fence);
+	if (!pt)
+		return -EINVAL;
+
+	spin_lock_irqsave(fence->lock, flags);
+	if (test_bit(SW_SYNC_HAS_DEADLINE_BIT, &fence->flags)) {
+		data.deadline_ns = ktime_to_ns(pt->deadline);
+	} else {
+		ret = -ENOENT;
+	}
+	spin_unlock_irqrestore(fence->lock, flags);
+
+	dma_fence_put(fence);
+
+	if (ret)
+		return ret;
+
+	if (copy_to_user((void __user *)arg, &data, sizeof(data)))
+		return -EFAULT;
+
+	return 0;
+}
+
 static long sw_sync_ioctl(struct file *file, unsigned int cmd,
 			  unsigned long arg)
 {
@@ -399,6 +478,9 @@ static long sw_sync_ioctl(struct file *file, unsigned int cmd,
 	case SW_SYNC_IOC_INC:
 		return sw_sync_ioctl_inc(obj, arg);
 
+	case SW_SYNC_GET_DEADLINE:
+		return sw_sync_ioctl_get_deadline(obj, arg);
+
 	default:
 		return -ENOTTY;
 	}
diff --git a/drivers/dma-buf/sync_debug.h b/drivers/dma-buf/sync_debug.h
index 6176e52ba2d7..a1bdd62efccd 100644
--- a/drivers/dma-buf/sync_debug.h
+++ b/drivers/dma-buf/sync_debug.h
@@ -55,11 +55,13 @@ static inline struct sync_timeline *dma_fence_parent(struct dma_fence *fence)
  * @base: base fence object
  * @link: link on the sync timeline's list
  * @node: node in the sync timeline's tree
+ * @deadline: the earliest fence deadline hint
  */
 struct sync_pt {
 	struct dma_fence base;
 	struct list_head link;
 	struct rb_node node;
+	ktime_t deadline;
 };
 
 extern const struct file_operations sw_sync_debugfs_fops;
diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
index 2e9a316c596a..d9b1c1b2a72b 100644
--- a/drivers/dma-buf/sync_file.c
+++ b/drivers/dma-buf/sync_file.c
@@ -347,6 +347,22 @@ out:
 	return ret;
 }
 
+static int sync_file_ioctl_set_deadline(struct sync_file *sync_file,
+					unsigned long arg)
+{
+	struct sync_set_deadline ts;
+
+	if (copy_from_user(&ts, (void __user *)arg, sizeof(ts)))
+		return -EFAULT;
+
+	if (ts.pad)
+		return -EINVAL;
+
+	dma_fence_set_deadline(sync_file->fence, ns_to_ktime(ts.deadline_ns));
+
+	return 0;
+}
+
 static long sync_file_ioctl(struct file *file, unsigned int cmd,
 			    unsigned long arg)
 {
@@ -359,6 +375,9 @@ static long sync_file_ioctl(struct file *file, unsigned int cmd,
 	case SYNC_IOC_FILE_INFO:
 		return sync_file_ioctl_fence_info(sync_file, arg);
 
+	case SYNC_IOC_SET_DEADLINE:
+		return sync_file_ioctl_set_deadline(sync_file, arg);
+
 	default:
 		return -ENOTTY;
 	}