Merge tag 'drm-misc-next-2025-09-04' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

drm-misc-next for v6.18:

Cross-subsystem Changes:

- Update a number of DT bindings for STM32MP25 Arm SoC

Core Changes:

gem:
- Simplify locking for GPUVM

panel-backlight-quirks:
- Add additional quirks for EDID, DMI, brightness

sched:
- Fix race condition in trace code
- Clean up

sysfb:
- Clean up

Driver Changes:

amdgpu:
- Give kernel jobs a unique id for better tracing

amdxdna:
- Improve error reporting

bridge:
- Improve ref counting on bridge management
- adv7511: Provide SPD and HDMI infoframes
- it6505: Replace crypto_shash with sha()
- synopsys: Add support for DW DPTX Controller plus DT bindings

gud:
- Replace simple-KMS pipe with regular atomic helpers

imagination:
- Improve power management
- Add support for TH1520 GPU
- Support Risc-V architectures

ivpu:
- Clean up

nouveau:
- Improve error reporting

panthor:
- Fail VM bind if BO has offset
- Clean up

rcar-du:
- Make number of lanes configurable

rockchip:
- Add support for RK3588 DPTX output

rocket:
- Use kfree() and sizeof() correctly
- Test DMA status
- Clean up

sitronix:
- st7571-i2c: Add support for inverted displays and 2-bit grayscale
- Clean up

stm:
- ltdc: Add support support for STM32MP257F-EV1 plus DT bindings

tidss:
- Convert to kernel's FIELD_ macros

v3d:
- Improve job management and locking

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

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20250904090932.GA193997@linux.fritz.box

1 files changed, 14 insertions, 11 deletions

diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
index 8867b95ab089..5a4697f636f2 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -285,9 +285,9 @@ long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout)
 		return 0;
 
 	sched = entity->rq->sched;
-	/**
-	 * The client will not queue more IBs during this fini, consume existing
-	 * queued IBs or discard them on SIGKILL
+	/*
+	 * The client will not queue more jobs during this fini - consume
+	 * existing queued ones, or discard them on SIGKILL.
 	 */
 	if (current->flags & PF_EXITING) {
 		if (timeout)
@@ -300,7 +300,7 @@ long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout)
 				    drm_sched_entity_is_idle(entity));
 	}
 
-	/* For killed process disable any more IBs enqueue right now */
+	/* For a killed process disallow further enqueueing of jobs. */
 	last_user = cmpxchg(&entity->last_user, current->group_leader, NULL);
 	if ((!last_user || last_user == current->group_leader) &&
 	    (current->flags & PF_EXITING) && (current->exit_code == SIGKILL))
@@ -324,9 +324,9 @@ EXPORT_SYMBOL(drm_sched_entity_flush);
 void drm_sched_entity_fini(struct drm_sched_entity *entity)
 {
 	/*
-	 * If consumption of existing IBs wasn't completed. Forcefully remove
-	 * them here. Also makes sure that the scheduler won't touch this entity
-	 * any more.
+	 * If consumption of existing jobs wasn't completed forcefully remove
+	 * them. Also makes sure that the scheduler won't touch this entity any
+	 * more.
 	 */
 	drm_sched_entity_kill(entity);
 
@@ -391,7 +391,8 @@ EXPORT_SYMBOL(drm_sched_entity_set_priority);
  * Add a callback to the current dependency of the entity to wake up the
  * scheduler when the entity becomes available.
  */
-static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
+static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity,
+					       struct drm_sched_job *sched_job)
 {
 	struct drm_gpu_scheduler *sched = entity->rq->sched;
 	struct dma_fence *fence = entity->dependency;
@@ -421,6 +422,10 @@ static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
 		entity->dependency = fence;
 	}
 
+	if (trace_drm_sched_job_unschedulable_enabled() &&
+	    !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &entity->dependency->flags))
+		trace_drm_sched_job_unschedulable(sched_job, entity->dependency);
+
 	if (!dma_fence_add_callback(entity->dependency, &entity->cb,
 				    drm_sched_entity_wakeup))
 		return true;
@@ -461,10 +466,8 @@ struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
 
 	while ((entity->dependency =
 			drm_sched_job_dependency(sched_job, entity))) {
-		if (drm_sched_entity_add_dependency_cb(entity)) {
-			trace_drm_sched_job_unschedulable(sched_job, entity->dependency);
+		if (drm_sched_entity_add_dependency_cb(entity, sched_job))
 			return NULL;
-		}
 	}
 
 	/* skip jobs from entity that marked guilty */