diff options
Diffstat (limited to 'drivers/gpu/drm/v3d/v3d_sched.c')
| -rw-r--r-- | drivers/gpu/drm/v3d/v3d_sched.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c index 99ac4995b5a1..da08ddb01d21 100644 --- a/drivers/gpu/drm/v3d/v3d_sched.c +++ b/drivers/gpu/drm/v3d/v3d_sched.c @@ -5,16 +5,16 @@ * DOC: Broadcom V3D scheduling * * The shared DRM GPU scheduler is used to coordinate submitting jobs - * to the hardware. Each DRM fd (roughly a client process) gets its - * own scheduler entity, which will process jobs in order. The GPU - * scheduler will round-robin between clients to submit the next job. + * to the hardware. Each DRM fd (roughly a client process) gets its + * own scheduler entity, which will process jobs in order. The GPU + * scheduler will schedule the clients with a FIFO scheduling algorithm. * * For simplicity, and in order to keep latency low for interactive * jobs when bulk background jobs are queued up, we submit a new job * to the HW only when it has completed the last one, instead of - * filling up the CT[01]Q FIFOs with jobs. Similarly, we use - * drm_sched_job_add_dependency() to manage the dependency between bin and - * render, instead of having the clients submit jobs using the HW's + * filling up the CT[01]Q FIFOs with jobs. Similarly, we use + * `drm_sched_job_add_dependency()` to manage the dependency between bin + * and render, instead of having the clients submit jobs using the HW's * semaphores to interlock between them. */ @@ -120,11 +120,19 @@ v3d_cpu_job_free(struct drm_sched_job *sched_job) static void v3d_switch_perfmon(struct v3d_dev *v3d, struct v3d_job *job) { - if (job->perfmon != v3d->active_perfmon) + struct v3d_perfmon *perfmon = v3d->global_perfmon; + + if (!perfmon) + perfmon = job->perfmon; + + if (perfmon == v3d->active_perfmon) + return; + + if (perfmon != v3d->active_perfmon) v3d_perfmon_stop(v3d, v3d->active_perfmon, true); - if (job->perfmon && v3d->active_perfmon != job->perfmon) - v3d_perfmon_start(v3d, job->perfmon); + if (perfmon && v3d->active_perfmon != perfmon) + v3d_perfmon_start(v3d, perfmon); } static void |