From: Maíra Canal <mcanal@igalia.com>
Date: Tue, 26 Aug 2025 14:19:02 +0000 (-0300)
Subject: drm/v3d: Synchronous operations can't timeout
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=78fe02d090d38393cc00de9d1929e59426f202a4;p=users%2Fhch%2Fmisc.git

drm/v3d: Synchronous operations can't timeout

CPU jobs and CACHE CLEAN jobs execute synchronously once the DRM
scheduler starts running them. Therefore, there is no fence to wait on,
neither are those jobs able to timeout.

Hence, remove the `timedout_job` hook from the CPU and CACHE CLEAN
scheduler ops.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Link: https://lore.kernel.org/r/20250826-v3d-queue-lock-v3-5-979efc43e490@igalia.com
Signed-off-by: Maíra Canal <mcanal@igalia.com>
---

diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c
index ad72be7c5d50..b8984e608547 100644
--- a/drivers/gpu/drm/v3d/v3d_sched.c
+++ b/drivers/gpu/drm/v3d/v3d_sched.c
@@ -701,6 +701,7 @@ v3d_cpu_job_run(struct drm_sched_job *sched_job)
 	trace_v3d_cpu_job_end(&v3d->drm, job->job_type);
 	v3d_job_update_stats(&job->base, V3D_CPU);
 
+	/* Synchronous operation, so no fence to wait on. */
 	return NULL;
 }
 
@@ -716,6 +717,7 @@ v3d_cache_clean_job_run(struct drm_sched_job *sched_job)
 
 	v3d_job_update_stats(job, V3D_CACHE_CLEAN);
 
+	/* Synchronous operation, so no fence to wait on. */
 	return NULL;
 }
 
@@ -797,7 +799,7 @@ v3d_render_job_timedout(struct drm_sched_job *sched_job)
 }
 
 static enum drm_gpu_sched_stat
-v3d_generic_job_timedout(struct drm_sched_job *sched_job)
+v3d_tfu_job_timedout(struct drm_sched_job *sched_job)
 {
 	struct v3d_job *job = to_v3d_job(sched_job);
 
@@ -837,7 +839,7 @@ static const struct drm_sched_backend_ops v3d_render_sched_ops = {
 
 static const struct drm_sched_backend_ops v3d_tfu_sched_ops = {
 	.run_job = v3d_tfu_job_run,
-	.timedout_job = v3d_generic_job_timedout,
+	.timedout_job = v3d_tfu_job_timedout,
 	.free_job = v3d_sched_job_free,
 };
 
@@ -849,13 +851,11 @@ static const struct drm_sched_backend_ops v3d_csd_sched_ops = {
 
 static const struct drm_sched_backend_ops v3d_cache_clean_sched_ops = {
 	.run_job = v3d_cache_clean_job_run,
-	.timedout_job = v3d_generic_job_timedout,
 	.free_job = v3d_sched_job_free
 };
 
 static const struct drm_sched_backend_ops v3d_cpu_sched_ops = {
 	.run_job = v3d_cpu_job_run,
-	.timedout_job = v3d_generic_job_timedout,
 	.free_job = v3d_cpu_job_free
 };