[PATCH v2 1/2] drm/sched: implement and export drm_sched_pick_best

[PATCH v2 1/2] drm/sched: implement and export drm_sched_pick_best

[Nirmoy Das]

Remove drm_sched_entity_get_free_sched() and use the logic of picking
the least loaded drm scheduler from a drm scheduler list to implement
drm_sched_pick_best(). This patch also exports drm_sched_pick_best() so
that it can be utilized by other drm drivers.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/scheduler/sched_entity.c | 40 ++++--------------------
 drivers/gpu/drm/scheduler/sched_main.c   | 35 +++++++++++++++++++++
 include/drm/gpu_scheduler.h              |  3 ++
 3 files changed, 44 insertions(+), 34 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
index d631521a9679..ffc8adb6ff25 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -137,38 +137,6 @@ bool drm_sched_entity_is_ready(struct drm_sched_entity *entity)
 	return true;
 }

-/**
- * drm_sched_entity_get_free_sched - Get the rq from rq_list with least load
- *
- * @entity: scheduler entity
- *
- * Return the pointer to the rq with least load.
- */
-static struct drm_sched_rq *
-drm_sched_entity_get_free_sched(struct drm_sched_entity *entity)
-{
-	struct drm_sched_rq *rq = NULL;
-	unsigned int min_jobs = UINT_MAX, num_jobs;
-	int i;
-
-	for (i = 0; i < entity->num_sched_list; ++i) {
-		struct drm_gpu_scheduler *sched = entity->sched_list[i];
-
-		if (!entity->sched_list[i]->ready) {
-			DRM_WARN("sched%s is not ready, skipping", sched->name);
-			continue;
-		}
-
-		num_jobs = atomic_read(&sched->num_jobs);
-		if (num_jobs < min_jobs) {
-			min_jobs = num_jobs;
-			rq = &entity->sched_list[i]->sched_rq[entity->priority];
-		}
-	}
-
-	return rq;
-}
-
 /**
  * drm_sched_entity_flush - Flush a context entity
  *
@@ -479,7 +447,8 @@ struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
 void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
 {
 	struct dma_fence *fence;
-	struct drm_sched_rq *rq;
+	struct drm_gpu_scheduler *sched;
+	struct drm_sched_rq *rq = NULL;

 	if (spsc_queue_count(&entity->job_queue) || entity->num_sched_list <= 1)
 		return;
@@ -489,7 +458,10 @@ void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
 		return;

 	spin_lock(&entity->rq_lock);
-	rq = drm_sched_entity_get_free_sched(entity);
+	sched = drm_sched_pick_best(entity->sched_list, entity->num_sched_list);
+	if (sched)
+		rq = &sched->sched_rq[entity->priority];
+
 	if (rq != entity->rq) {
 		drm_sched_rq_remove_entity(entity->rq, entity);
 		entity->rq = rq;
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index 3fad5876a13f..d640f4087795 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -705,6 +705,41 @@ drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
 	return job;
 }

+/**
+ * drm_sched_pick_best - Get a drm sched from a sched_list with the least load
+ * @sched_list: list of drm_gpu_schedulers
+ * @num_sched_list: number of drm_gpu_schedulers in the sched_list
+ *
+ * Returns pointer of the sched with the least load or NULL if none of the
+ * drm_gpu_schedulers are ready
+ */
+struct drm_gpu_scheduler *
+drm_sched_pick_best(struct drm_gpu_scheduler **sched_list,
+		     unsigned int num_sched_list)
+{
+	struct drm_gpu_scheduler *sched, *picked_sched = NULL;
+	int i;
+	unsigned int min_jobs = UINT_MAX, num_jobs;
+
+	for (i = 0; i < num_sched_list; ++i) {
+		sched = sched_list[i];
+
+		if (!sched->ready) {
+			DRM_WARN("sched%s is not ready, skipping", sched->name);
+			continue;
+		}
+
+		num_jobs = atomic_read(&sched->num_jobs);
+		if (num_jobs < min_jobs) {
+			min_jobs = num_jobs;
+			picked_sched = sched;
+		}
+	}
+
+	return picked_sched;
+}
+EXPORT_SYMBOL(drm_sched_pick_best);
+
 /**
  * drm_sched_blocked - check if the scheduler is blocked
  *
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
index ae39eacee250..ca6b8b01fac9 100644
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -341,5 +341,8 @@ void drm_sched_fence_finished(struct drm_sched_fence *fence);
 unsigned long drm_sched_suspend_timeout(struct drm_gpu_scheduler *sched);
 void drm_sched_resume_timeout(struct drm_gpu_scheduler *sched,
 		                unsigned long remaining);
+struct drm_gpu_scheduler *
+drm_sched_pick_best(struct drm_gpu_scheduler **sched_list,
+		     unsigned int num_sched_list);

 #endif
--
2.25.0

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[PATCH 2/2] drm/amdgpu: disable gpu_sched load balancer for vcn jobs

[Nirmoy Das]

VCN HW doesn't support dynamic load balance on multiple instances
for a context. This patch initializes VNC entities with only one
drm_gpu_scheduler picked by drm_sched_pick_best(). Picking a
drm_gpu_scheduler using drm_sched_pick_best() ensures that we
do load balance among multiple contexts but not among multiple
jobs in a context.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index fa575bdc03c8..8f1e3c05812e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -121,12 +121,17 @@ static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, const u32 hw_ip, const
 			num_scheds = 1;
 			break;
 		case AMDGPU_HW_IP_VCN_DEC:
-			scheds = adev->vcn.vcn_dec_sched;
 			num_scheds =  adev->vcn.num_vcn_dec_sched;
+			sched = drm_sched_pick_best(adev->vcn.vcn_dec_sched,
+						    num_scheds);
+			scheds = &sched;
 			break;
 		case AMDGPU_HW_IP_VCN_ENC:
 			scheds = adev->vcn.vcn_enc_sched;
 			num_scheds =  adev->vcn.num_vcn_enc_sched;
+			sched = drm_sched_pick_best(adev->vcn.vcn_enc_sched,
+						    num_scheds);
+			scheds = &sched;
 			break;
 		case AMDGPU_HW_IP_VCN_JPEG:
 			scheds = adev->jpeg.jpeg_sched;
-- 
2.25.0

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Re: [PATCH v2 1/2] drm/sched: implement and export drm_sched_pick_best

[Christian König]

Am 13.03.20 um 14:59 schrieb Nirmoy Das:
> Remove drm_sched_entity_get_free_sched() and use the logic of picking
> the least loaded drm scheduler from a drm scheduler list to implement
> drm_sched_pick_best(). This patch also exports drm_sched_pick_best() so
> that it can be utilized by other drm drivers.
>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> ---
>   drivers/gpu/drm/scheduler/sched_entity.c | 40 ++++--------------------
>   drivers/gpu/drm/scheduler/sched_main.c   | 35 +++++++++++++++++++++
>   include/drm/gpu_scheduler.h              |  3 ++
>   3 files changed, 44 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
> index d631521a9679..ffc8adb6ff25 100644
> --- a/drivers/gpu/drm/scheduler/sched_entity.c
> +++ b/drivers/gpu/drm/scheduler/sched_entity.c
> @@ -137,38 +137,6 @@ bool drm_sched_entity_is_ready(struct drm_sched_entity *entity)
>   	return true;
>   }
>
> -/**
> - * drm_sched_entity_get_free_sched - Get the rq from rq_list with least load
> - *
> - * @entity: scheduler entity
> - *
> - * Return the pointer to the rq with least load.
> - */
> -static struct drm_sched_rq *
> -drm_sched_entity_get_free_sched(struct drm_sched_entity *entity)
> -{
> -	struct drm_sched_rq *rq = NULL;
> -	unsigned int min_jobs = UINT_MAX, num_jobs;
> -	int i;
> -
> -	for (i = 0; i < entity->num_sched_list; ++i) {
> -		struct drm_gpu_scheduler *sched = entity->sched_list[i];
> -
> -		if (!entity->sched_list[i]->ready) {
> -			DRM_WARN("sched%s is not ready, skipping", sched->name);
> -			continue;
> -		}
> -
> -		num_jobs = atomic_read(&sched->num_jobs);
> -		if (num_jobs < min_jobs) {
> -			min_jobs = num_jobs;
> -			rq = &entity->sched_list[i]->sched_rq[entity->priority];
> -		}
> -	}
> -
> -	return rq;
> -}
> -
>   /**
>    * drm_sched_entity_flush - Flush a context entity
>    *
> @@ -479,7 +447,8 @@ struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
>   void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
>   {
>   	struct dma_fence *fence;
> -	struct drm_sched_rq *rq;
> +	struct drm_gpu_scheduler *sched;
> +	struct drm_sched_rq *rq = NULL;
>
>   	if (spsc_queue_count(&entity->job_queue) || entity->num_sched_list <= 1)
>   		return;
> @@ -489,7 +458,10 @@ void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
>   		return;
>
>   	spin_lock(&entity->rq_lock);
> -	rq = drm_sched_entity_get_free_sched(entity);
> +	sched = drm_sched_pick_best(entity->sched_list, entity->num_sched_list);
> +	if (sched)
> +		rq = &sched->sched_rq[entity->priority];

Maybe write this as "rq = sched ? &sched->sched_rq[entity->priority] : 
NULL" and drop the NULL initialization above.

Apart from that looks good to me,
Christian.

> +
>   	if (rq != entity->rq) {
>   		drm_sched_rq_remove_entity(entity->rq, entity);
>   		entity->rq = rq;
> diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
> index 3fad5876a13f..d640f4087795 100644
> --- a/drivers/gpu/drm/scheduler/sched_main.c
> +++ b/drivers/gpu/drm/scheduler/sched_main.c
> @@ -705,6 +705,41 @@ drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
>   	return job;
>   }
>
> +/**
> + * drm_sched_pick_best - Get a drm sched from a sched_list with the least load
> + * @sched_list: list of drm_gpu_schedulers
> + * @num_sched_list: number of drm_gpu_schedulers in the sched_list
> + *
> + * Returns pointer of the sched with the least load or NULL if none of the
> + * drm_gpu_schedulers are ready
> + */
> +struct drm_gpu_scheduler *
> +drm_sched_pick_best(struct drm_gpu_scheduler **sched_list,
> +		     unsigned int num_sched_list)
> +{
> +	struct drm_gpu_scheduler *sched, *picked_sched = NULL;
> +	int i;
> +	unsigned int min_jobs = UINT_MAX, num_jobs;
> +
> +	for (i = 0; i < num_sched_list; ++i) {
> +		sched = sched_list[i];
> +
> +		if (!sched->ready) {
> +			DRM_WARN("sched%s is not ready, skipping", sched->name);
> +			continue;
> +		}
> +
> +		num_jobs = atomic_read(&sched->num_jobs);
> +		if (num_jobs < min_jobs) {
> +			min_jobs = num_jobs;
> +			picked_sched = sched;
> +		}
> +	}
> +
> +	return picked_sched;
> +}
> +EXPORT_SYMBOL(drm_sched_pick_best);
> +
>   /**
>    * drm_sched_blocked - check if the scheduler is blocked
>    *
> diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
> index ae39eacee250..ca6b8b01fac9 100644
> --- a/include/drm/gpu_scheduler.h
> +++ b/include/drm/gpu_scheduler.h
> @@ -341,5 +341,8 @@ void drm_sched_fence_finished(struct drm_sched_fence *fence);
>   unsigned long drm_sched_suspend_timeout(struct drm_gpu_scheduler *sched);
>   void drm_sched_resume_timeout(struct drm_gpu_scheduler *sched,
>   		                unsigned long remaining);
> +struct drm_gpu_scheduler *
> +drm_sched_pick_best(struct drm_gpu_scheduler **sched_list,
> +		     unsigned int num_sched_list);
>
>   #endif
> --
> 2.25.0
>

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Re: [PATCH v2 1/2] drm/sched: implement and export drm_sched_pick_best

[Nirmoy]

ah please ignore this I forgot to change the "sched" -> "scheduler"

On 3/13/20 2:59 PM, Nirmoy Das wrote:
> Remove drm_sched_entity_get_free_sched() and use the logic of picking
> the least loaded drm scheduler from a drm scheduler list to implement
> drm_sched_pick_best(). This patch also exports drm_sched_pick_best() so
> that it can be utilized by other drm drivers.
>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> ---
>   drivers/gpu/drm/scheduler/sched_entity.c | 40 ++++--------------------
>   drivers/gpu/drm/scheduler/sched_main.c   | 35 +++++++++++++++++++++
>   include/drm/gpu_scheduler.h              |  3 ++
>   3 files changed, 44 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
> index d631521a9679..ffc8adb6ff25 100644
> --- a/drivers/gpu/drm/scheduler/sched_entity.c
> +++ b/drivers/gpu/drm/scheduler/sched_entity.c
> @@ -137,38 +137,6 @@ bool drm_sched_entity_is_ready(struct drm_sched_entity *entity)
>   	return true;
>   }
>
> -/**
> - * drm_sched_entity_get_free_sched - Get the rq from rq_list with least load
> - *
> - * @entity: scheduler entity
> - *
> - * Return the pointer to the rq with least load.
> - */
> -static struct drm_sched_rq *
> -drm_sched_entity_get_free_sched(struct drm_sched_entity *entity)
> -{
> -	struct drm_sched_rq *rq = NULL;
> -	unsigned int min_jobs = UINT_MAX, num_jobs;
> -	int i;
> -
> -	for (i = 0; i < entity->num_sched_list; ++i) {
> -		struct drm_gpu_scheduler *sched = entity->sched_list[i];
> -
> -		if (!entity->sched_list[i]->ready) {
> -			DRM_WARN("sched%s is not ready, skipping", sched->name);
> -			continue;
> -		}
> -
> -		num_jobs = atomic_read(&sched->num_jobs);
> -		if (num_jobs < min_jobs) {
> -			min_jobs = num_jobs;
> -			rq = &entity->sched_list[i]->sched_rq[entity->priority];
> -		}
> -	}
> -
> -	return rq;
> -}
> -
>   /**
>    * drm_sched_entity_flush - Flush a context entity
>    *
> @@ -479,7 +447,8 @@ struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
>   void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
>   {
>   	struct dma_fence *fence;
> -	struct drm_sched_rq *rq;
> +	struct drm_gpu_scheduler *sched;
> +	struct drm_sched_rq *rq = NULL;
>
>   	if (spsc_queue_count(&entity->job_queue) || entity->num_sched_list <= 1)
>   		return;
> @@ -489,7 +458,10 @@ void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
>   		return;
>
>   	spin_lock(&entity->rq_lock);
> -	rq = drm_sched_entity_get_free_sched(entity);
> +	sched = drm_sched_pick_best(entity->sched_list, entity->num_sched_list);
> +	if (sched)
> +		rq = &sched->sched_rq[entity->priority];
> +
>   	if (rq != entity->rq) {
>   		drm_sched_rq_remove_entity(entity->rq, entity);
>   		entity->rq = rq;
> diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
> index 3fad5876a13f..d640f4087795 100644
> --- a/drivers/gpu/drm/scheduler/sched_main.c
> +++ b/drivers/gpu/drm/scheduler/sched_main.c
> @@ -705,6 +705,41 @@ drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
>   	return job;
>   }
>
> +/**
> + * drm_sched_pick_best - Get a drm sched from a sched_list with the least load
> + * @sched_list: list of drm_gpu_schedulers
> + * @num_sched_list: number of drm_gpu_schedulers in the sched_list
> + *
> + * Returns pointer of the sched with the least load or NULL if none of the
> + * drm_gpu_schedulers are ready
> + */
> +struct drm_gpu_scheduler *
> +drm_sched_pick_best(struct drm_gpu_scheduler **sched_list,
> +		     unsigned int num_sched_list)
> +{
> +	struct drm_gpu_scheduler *sched, *picked_sched = NULL;
> +	int i;
> +	unsigned int min_jobs = UINT_MAX, num_jobs;
> +
> +	for (i = 0; i < num_sched_list; ++i) {
> +		sched = sched_list[i];
> +
> +		if (!sched->ready) {
> +			DRM_WARN("sched%s is not ready, skipping", sched->name);
> +			continue;
> +		}
> +
> +		num_jobs = atomic_read(&sched->num_jobs);
> +		if (num_jobs < min_jobs) {
> +			min_jobs = num_jobs;
> +			picked_sched = sched;
> +		}
> +	}
> +
> +	return picked_sched;
> +}
> +EXPORT_SYMBOL(drm_sched_pick_best);
> +
>   /**
>    * drm_sched_blocked - check if the scheduler is blocked
>    *
> diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
> index ae39eacee250..ca6b8b01fac9 100644
> --- a/include/drm/gpu_scheduler.h
> +++ b/include/drm/gpu_scheduler.h
> @@ -341,5 +341,8 @@ void drm_sched_fence_finished(struct drm_sched_fence *fence);
>   unsigned long drm_sched_suspend_timeout(struct drm_gpu_scheduler *sched);
>   void drm_sched_resume_timeout(struct drm_gpu_scheduler *sched,
>   		                unsigned long remaining);
> +struct drm_gpu_scheduler *
> +drm_sched_pick_best(struct drm_gpu_scheduler **sched_list,
> +		     unsigned int num_sched_list);
>
>   #endif
> --
> 2.25.0
>
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Re: [PATCH 2/2] drm/amdgpu: disable gpu_sched load balancer for vcn jobs

[Christian König]

Am 13.03.20 um 14:59 schrieb Nirmoy Das:
> VCN HW doesn't support dynamic load balance on multiple instances
> for a context. This patch initializes VNC entities with only one
> drm_gpu_scheduler picked by drm_sched_pick_best(). Picking a
> drm_gpu_scheduler using drm_sched_pick_best() ensures that we
> do load balance among multiple contexts but not among multiple
> jobs in a context.
>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 7 ++++++-
>   1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
> index fa575bdc03c8..8f1e3c05812e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
> @@ -121,12 +121,17 @@ static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, const u32 hw_ip, const
>   			num_scheds = 1;
>   			break;
>   		case AMDGPU_HW_IP_VCN_DEC:
> -			scheds = adev->vcn.vcn_dec_sched;
>   			num_scheds =  adev->vcn.num_vcn_dec_sched;
> +			sched = drm_sched_pick_best(adev->vcn.vcn_dec_sched,
> +						    num_scheds);
> +			scheds = &sched;
>   			break;
>   		case AMDGPU_HW_IP_VCN_ENC:
>   			scheds = adev->vcn.vcn_enc_sched;
>   			num_scheds =  adev->vcn.num_vcn_enc_sched;
> +			sched = drm_sched_pick_best(adev->vcn.vcn_enc_sched,
> +						    num_scheds);
> +			scheds = &sched;

num_scheds need to be set to 1 here and above.

And maybe add a separate patch to fix the indentation of the case labels.

Christian.

>   			break;
>   		case AMDGPU_HW_IP_VCN_JPEG:
>   			scheds = adev->jpeg.jpeg_sched;

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Re: [PATCH 2/2] drm/amdgpu: disable gpu_sched load balancer for vcn jobs

[Nirmoy]

On 3/13/20 3:03 PM, Christian König wrote:
> Am 13.03.20 um 14:59 schrieb Nirmoy Das:
>> VCN HW doesn't support dynamic load balance on multiple instances
>> for a context. This patch initializes VNC entities with only one
>> drm_gpu_scheduler picked by drm_sched_pick_best(). Picking a
>> drm_gpu_scheduler using drm_sched_pick_best() ensures that we
>> do load balance among multiple contexts but not among multiple
>> jobs in a context.
>>
>> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 7 ++++++-
>>   1 file changed, 6 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
>> index fa575bdc03c8..8f1e3c05812e 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
>> @@ -121,12 +121,17 @@ static int amdgpu_ctx_init_entity(struct 
>> amdgpu_ctx *ctx, const u32 hw_ip, const
>>               num_scheds = 1;
>>               break;
>>           case AMDGPU_HW_IP_VCN_DEC:
>> -            scheds = adev->vcn.vcn_dec_sched;
>>               num_scheds =  adev->vcn.num_vcn_dec_sched;
>> +            sched = drm_sched_pick_best(adev->vcn.vcn_dec_sched,
>> +                            num_scheds);
>> +            scheds = &sched;
>>               break;
>>           case AMDGPU_HW_IP_VCN_ENC:
>>               scheds = adev->vcn.vcn_enc_sched;
>>               num_scheds =  adev->vcn.num_vcn_enc_sched;
>> +            sched = drm_sched_pick_best(adev->vcn.vcn_enc_sched,
>> +                            num_scheds);
>> +            scheds = &sched;
>
> num_scheds need to be set to 1 here and above.


Right or else it would've caused NULL exception.

Thanks,

Nirmoy


>
> And maybe add a separate patch to fix the indentation of the case labels.
>
> Christian.
>
>>               break;
>>           case AMDGPU_HW_IP_VCN_JPEG:
>>               scheds = adev->jpeg.jpeg_sched;
>
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