diff mbox series

[v21,3/9] media: test-drivers: Set REQBUFS minimum number of buffers

Message ID 20240314153226.197445-4-benjamin.gaignard@collabora.com (mailing list archive)
State New, archived
Headers show
Series Add REMOVE_BUF ioctl | expand

Commit Message

Benjamin Gaignard March 14, 2024, 3:32 p.m. UTC 
Instead of using 'min_queued_buffers' field to specify the
minimum number of buffers to be allocated when calling REQBUF
use 'min_reqbufs_allocation' field which is dedicated to this
purpose.

While at it rename vivid_create_queue() parameter.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
 drivers/media/test-drivers/vimc/vimc-capture.c | 2 +-
 drivers/media/test-drivers/vivid/vivid-core.c  | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

Comments

Hans Verkuil March 18, 2024, 10:06 a.m. UTC | #1 
Hi Benjamin,

On 14/03/2024 4:32 pm, Benjamin Gaignard wrote:
> Instead of using 'min_queued_buffers' field to specify the
> minimum number of buffers to be allocated when calling REQBUF
> use 'min_reqbufs_allocation' field which is dedicated to this
> purpose.
> 
> While at it rename vivid_create_queue() parameter.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
> ---
>  drivers/media/test-drivers/vimc/vimc-capture.c | 2 +-
>  drivers/media/test-drivers/vivid/vivid-core.c  | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c
> index 2a2d19d23bab..97693561f1e4 100644
> --- a/drivers/media/test-drivers/vimc/vimc-capture.c
> +++ b/drivers/media/test-drivers/vimc/vimc-capture.c
> @@ -432,7 +432,7 @@ static struct vimc_ent_device *vimc_capture_add(struct vimc_device *vimc,
>  	q->mem_ops = vimc_allocator == VIMC_ALLOCATOR_DMA_CONTIG
>  		   ? &vb2_dma_contig_memops : &vb2_vmalloc_memops;
>  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> -	q->min_queued_buffers = 2;
> +	q->min_reqbufs_allocation = 2;
>  	q->lock = &vcapture->lock;
>  	q->dev = v4l2_dev->dev;
>  
> diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c
> index 159c72cbb5bf..11b8520d9f57 100644
> --- a/drivers/media/test-drivers/vivid/vivid-core.c
> +++ b/drivers/media/test-drivers/vivid/vivid-core.c
> @@ -861,7 +861,7 @@ static const struct media_device_ops vivid_media_ops = {
>  static int vivid_create_queue(struct vivid_dev *dev,
>  			      struct vb2_queue *q,
>  			      u32 buf_type,
> -			      unsigned int min_queued_buffers,
> +			      unsigned int min_reqbufs_allocation,
>  			      const struct vb2_ops *ops)
>  {
>  	if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->multiplanar)
> @@ -898,7 +898,7 @@ static int vivid_create_queue(struct vivid_dev *dev,
>  	q->mem_ops = allocators[dev->inst] == 1 ? &vb2_dma_contig_memops :
>  						  &vb2_vmalloc_memops;
>  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> -	q->min_queued_buffers = supports_requests[dev->inst] ? 0 : min_queued_buffers;
> +	q->min_reqbufs_allocation = min_reqbufs_allocation;
>  	q->lock = &dev->mutex;
>  	q->dev = dev->v4l2_dev.dev;
>  	q->supports_requests = supports_requests[dev->inst];

How did you test this series? If I run the test-media script using the patch
v4l2-compliance (the v9 series) I get two failures. Both are traced to code
in vivid: meta_out_queue_setup() and touch_cap_queue_setup():

Both have this code:

        if (*nplanes) {
                if (sizes[0] < size)
                        return -EINVAL;
        } else {
                sizes[0] = size;
        }

        if (q_num_bufs + *nbuffers < 2)
                *nbuffers = 2 - q_num_bufs;

        *nplanes = 1;
        return 0;

It's the *nbuffers assignment that is wrong. Looking at vivid-core.c I see
that vivid_create_queue() is called with min_reqbufs_allocation set to 1 for
these two devices. I think that should be 2, and then the code above can
be dropped.

It is probably best to post a v21.1 3/9 patch only.

Regards,

	Hans
Hans Verkuil March 18, 2024, 1:06 p.m. UTC | #2 
On 18/03/2024 11:06 am, Hans Verkuil wrote:
> Hi Benjamin,
> 
> On 14/03/2024 4:32 pm, Benjamin Gaignard wrote:
>> Instead of using 'min_queued_buffers' field to specify the
>> minimum number of buffers to be allocated when calling REQBUF
>> use 'min_reqbufs_allocation' field which is dedicated to this
>> purpose.
>>
>> While at it rename vivid_create_queue() parameter.
>>
>> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
>> ---
>>  drivers/media/test-drivers/vimc/vimc-capture.c | 2 +-
>>  drivers/media/test-drivers/vivid/vivid-core.c  | 4 ++--
>>  2 files changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c
>> index 2a2d19d23bab..97693561f1e4 100644
>> --- a/drivers/media/test-drivers/vimc/vimc-capture.c
>> +++ b/drivers/media/test-drivers/vimc/vimc-capture.c
>> @@ -432,7 +432,7 @@ static struct vimc_ent_device *vimc_capture_add(struct vimc_device *vimc,
>>  	q->mem_ops = vimc_allocator == VIMC_ALLOCATOR_DMA_CONTIG
>>  		   ? &vb2_dma_contig_memops : &vb2_vmalloc_memops;
>>  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>> -	q->min_queued_buffers = 2;
>> +	q->min_reqbufs_allocation = 2;
>>  	q->lock = &vcapture->lock;
>>  	q->dev = v4l2_dev->dev;
>>  
>> diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c
>> index 159c72cbb5bf..11b8520d9f57 100644
>> --- a/drivers/media/test-drivers/vivid/vivid-core.c
>> +++ b/drivers/media/test-drivers/vivid/vivid-core.c
>> @@ -861,7 +861,7 @@ static const struct media_device_ops vivid_media_ops = {
>>  static int vivid_create_queue(struct vivid_dev *dev,
>>  			      struct vb2_queue *q,
>>  			      u32 buf_type,
>> -			      unsigned int min_queued_buffers,
>> +			      unsigned int min_reqbufs_allocation,
>>  			      const struct vb2_ops *ops)
>>  {
>>  	if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->multiplanar)
>> @@ -898,7 +898,7 @@ static int vivid_create_queue(struct vivid_dev *dev,
>>  	q->mem_ops = allocators[dev->inst] == 1 ? &vb2_dma_contig_memops :
>>  						  &vb2_vmalloc_memops;
>>  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>> -	q->min_queued_buffers = supports_requests[dev->inst] ? 0 : min_queued_buffers;
>> +	q->min_reqbufs_allocation = min_reqbufs_allocation;
>>  	q->lock = &dev->mutex;
>>  	q->dev = dev->v4l2_dev.dev;
>>  	q->supports_requests = supports_requests[dev->inst];
> 
> How did you test this series? If I run the test-media script using the patch
> v4l2-compliance (the v9 series) I get two failures. Both are traced to code
> in vivid: meta_out_queue_setup() and touch_cap_queue_setup():
> 
> Both have this code:
> 
>         if (*nplanes) {
>                 if (sizes[0] < size)
>                         return -EINVAL;
>         } else {
>                 sizes[0] = size;
>         }
> 
>         if (q_num_bufs + *nbuffers < 2)
>                 *nbuffers = 2 - q_num_bufs;
> 
>         *nplanes = 1;
>         return 0;
> 
> It's the *nbuffers assignment that is wrong. Looking at vivid-core.c I see
> that vivid_create_queue() is called with min_reqbufs_allocation set to 1 for
> these two devices. I think that should be 2, and then the code above can
> be dropped.

Note that if that 'if (q_num_bufs + *nbuffers < 2)' is dropped, then you
should also drop the q_num_bufs assignment at the beginning of the function
since that is now no longer used.

Regards,

	Hans

> 
> It is probably best to post a v21.1 3/9 patch only.
> 
> Regards,
> 
> 	Hans
> 
> 
>
Mauro Carvalho Chehab March 21, 2024, 1:53 p.m. UTC | #3 
Em Thu, 14 Mar 2024 16:32:20 +0100
Benjamin Gaignard <benjamin.gaignard@collabora.com> escreveu:

> Instead of using 'min_queued_buffers' field to specify the
> minimum number of buffers to be allocated when calling REQBUF
> use 'min_reqbufs_allocation' field which is dedicated to this
> purpose.
> 
> While at it rename vivid_create_queue() parameter.

LGTM.
Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
> ---
>  drivers/media/test-drivers/vimc/vimc-capture.c | 2 +-
>  drivers/media/test-drivers/vivid/vivid-core.c  | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c
> index 2a2d19d23bab..97693561f1e4 100644
> --- a/drivers/media/test-drivers/vimc/vimc-capture.c
> +++ b/drivers/media/test-drivers/vimc/vimc-capture.c
> @@ -432,7 +432,7 @@ static struct vimc_ent_device *vimc_capture_add(struct vimc_device *vimc,
>  	q->mem_ops = vimc_allocator == VIMC_ALLOCATOR_DMA_CONTIG
>  		   ? &vb2_dma_contig_memops : &vb2_vmalloc_memops;
>  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> -	q->min_queued_buffers = 2;
> +	q->min_reqbufs_allocation = 2;
>  	q->lock = &vcapture->lock;
>  	q->dev = v4l2_dev->dev;
>  
> diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c
> index 159c72cbb5bf..11b8520d9f57 100644
> --- a/drivers/media/test-drivers/vivid/vivid-core.c
> +++ b/drivers/media/test-drivers/vivid/vivid-core.c
> @@ -861,7 +861,7 @@ static const struct media_device_ops vivid_media_ops = {
>  static int vivid_create_queue(struct vivid_dev *dev,
>  			      struct vb2_queue *q,
>  			      u32 buf_type,
> -			      unsigned int min_queued_buffers,
> +			      unsigned int min_reqbufs_allocation,
>  			      const struct vb2_ops *ops)
>  {
>  	if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->multiplanar)
> @@ -898,7 +898,7 @@ static int vivid_create_queue(struct vivid_dev *dev,
>  	q->mem_ops = allocators[dev->inst] == 1 ? &vb2_dma_contig_memops :
>  						  &vb2_vmalloc_memops;
>  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> -	q->min_queued_buffers = supports_requests[dev->inst] ? 0 : min_queued_buffers;
> +	q->min_reqbufs_allocation = min_reqbufs_allocation;
>  	q->lock = &dev->mutex;
>  	q->dev = dev->v4l2_dev.dev;
>  	q->supports_requests = supports_requests[dev->inst];



Thanks,
Mauro
diff mbox series

Patch

diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c
index 2a2d19d23bab..97693561f1e4 100644
--- a/drivers/media/test-drivers/vimc/vimc-capture.c
+++ b/drivers/media/test-drivers/vimc/vimc-capture.c
@@ -432,7 +432,7 @@  static struct vimc_ent_device *vimc_capture_add(struct vimc_device *vimc,
 	q->mem_ops = vimc_allocator == VIMC_ALLOCATOR_DMA_CONTIG
 		   ? &vb2_dma_contig_memops : &vb2_vmalloc_memops;
 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-	q->min_queued_buffers = 2;
+	q->min_reqbufs_allocation = 2;
 	q->lock = &vcapture->lock;
 	q->dev = v4l2_dev->dev;
 
diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c
index 159c72cbb5bf..11b8520d9f57 100644
--- a/drivers/media/test-drivers/vivid/vivid-core.c
+++ b/drivers/media/test-drivers/vivid/vivid-core.c
@@ -861,7 +861,7 @@  static const struct media_device_ops vivid_media_ops = {
 static int vivid_create_queue(struct vivid_dev *dev,
 			      struct vb2_queue *q,
 			      u32 buf_type,
-			      unsigned int min_queued_buffers,
+			      unsigned int min_reqbufs_allocation,
 			      const struct vb2_ops *ops)
 {
 	if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->multiplanar)
@@ -898,7 +898,7 @@  static int vivid_create_queue(struct vivid_dev *dev,
 	q->mem_ops = allocators[dev->inst] == 1 ? &vb2_dma_contig_memops :
 						  &vb2_vmalloc_memops;
 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-	q->min_queued_buffers = supports_requests[dev->inst] ? 0 : min_queued_buffers;
+	q->min_reqbufs_allocation = min_reqbufs_allocation;
 	q->lock = &dev->mutex;
 	q->dev = dev->v4l2_dev.dev;
 	q->supports_requests = supports_requests[dev->inst];