On 01/09/2017 04:10 PM, Hans Verkuil wrote:
> On 09/12/2016 10:47 AM, Vincent Abriou wrote:
>> It allows to simulate the behavior of hardware with such limitations or
>> to connect vivid to real hardware with such limitations.
>>
>> Add the "allocators" module parameter option to let vivid use the
>> dma-contig instead of vmalloc.
>>
>> Signed-off-by: Philipp Zabel <[email protected]>
>> Signed-off-by: Hans Verkuil <[email protected]>
>> Signed-off-by: Vincent Abriou <[email protected]>
>>
>> Cc: Philipp Zabel <[email protected]>
>> Cc: Hans Verkuil <[email protected]>
>> ---
>> Documentation/media/v4l-drivers/vivid.rst | 8 ++++++++
>> drivers/media/platform/vivid/Kconfig | 2 ++
>> drivers/media/platform/vivid/vivid-core.c | 32
>> ++++++++++++++++++++++++++-----
>> 3 files changed, 37 insertions(+), 5 deletions(-)
>>
>> diff --git a/Documentation/media/v4l-drivers/vivid.rst
>> b/Documentation/media/v4l-drivers/vivid.rst
>> index c8cf371..3e44b22 100644
>> --- a/Documentation/media/v4l-drivers/vivid.rst
>> +++ b/Documentation/media/v4l-drivers/vivid.rst
>> @@ -263,6 +263,14 @@ all configurable using the following module options:
>> removed. Unless overridden by ccs_cap_mode and/or ccs_out_mode the
>> will default to enabling crop, compose and scaling.
>>
>> +- allocators:
>> +
>> + memory allocator selection, default is 0. It specifies the way buffers
>> + will be allocated.
>> +
>> + - 0: vmalloc
>> + - 1: dma-contig
>
> Could you add support for dma-sg as well? I think that would be fairly
> trivial (unless
> I missed something).
>
> Once that's added (or it's clear dma-sg won't work for some reason), then
> I'll merge this.
>
> Regards,
>
> Hans
>
Hi Hans,
What is the difference between a vmalloc allocation exported in DMABUF
that will populate the sg and dma-sg allocation?
BR
Vincent
>> +
>> Taken together, all these module options allow you to precisely customize
>> the driver behavior and test your application with all sorts of
>> permutations.
>> It is also very suitable to emulate hardware that is not yet available, e.g.
>> diff --git a/drivers/media/platform/vivid/Kconfig
>> b/drivers/media/platform/vivid/Kconfig
>> index 8e6918c..2e238a1 100644
>> --- a/drivers/media/platform/vivid/Kconfig
>> +++ b/drivers/media/platform/vivid/Kconfig
>> @@ -1,6 +1,7 @@
>> config VIDEO_VIVID
>> tristate "Virtual Video Test Driver"
>> depends on VIDEO_DEV && VIDEO_V4L2 && !SPARC32 && !SPARC64 && FB
>> + depends on HAS_DMA
>> select FONT_SUPPORT
>> select FONT_8x16
>> select FB_CFB_FILLRECT
>> @@ -8,6 +9,7 @@ config VIDEO_VIVID
>> select FB_CFB_IMAGEBLIT
>> select MEDIA_CEC_EDID
>> select VIDEOBUF2_VMALLOC
>> + select VIDEOBUF2_DMA_CONTIG
>> select VIDEO_V4L2_TPG
>> default n
>> ---help---
>> diff --git a/drivers/media/platform/vivid/vivid-core.c
>> b/drivers/media/platform/vivid/vivid-core.c
>> index 741460a..02e1909 100644
>> --- a/drivers/media/platform/vivid/vivid-core.c
>> +++ b/drivers/media/platform/vivid/vivid-core.c
>> @@ -30,6 +30,7 @@
>> #include <linux/videodev2.h>
>> #include <linux/v4l2-dv-timings.h>
>> #include <media/videobuf2-vmalloc.h>
>> +#include <media/videobuf2-dma-contig.h>
>> #include <media/v4l2-dv-timings.h>
>> #include <media/v4l2-ioctl.h>
>> #include <media/v4l2-fh.h>
>> @@ -151,6 +152,12 @@ static bool no_error_inj;
>> module_param(no_error_inj, bool, 0444);
>> MODULE_PARM_DESC(no_error_inj, " if set disable the error injecting
>> controls");
>>
>> +static unsigned int allocators[VIVID_MAX_DEVS] = { [0 ... (VIVID_MAX_DEVS -
>> 1)] = 0 };
>> +module_param_array(allocators, uint, NULL, 0444);
>> +MODULE_PARM_DESC(allocators, " memory allocator selection, default is 0.\n"
>> + "\t\t 0 == vmalloc\n"
>> + "\t\t 1 == dma-contig");
>> +
>> static struct vivid_dev *vivid_devs[VIVID_MAX_DEVS];
>>
>> const struct v4l2_rect vivid_min_rect = {
>> @@ -636,6 +643,10 @@ static int vivid_create_instance(struct platform_device
>> *pdev, int inst)
>> {
>> static const struct v4l2_dv_timings def_dv_timings =
>> V4L2_DV_BT_CEA_1280X720P60;
>> + static const struct vb2_mem_ops * const vivid_mem_ops[2] = {
>> + &vb2_vmalloc_memops,
>> + &vb2_dma_contig_memops,
>> + };
>> unsigned in_type_counter[4] = { 0, 0, 0, 0 };
>> unsigned out_type_counter[4] = { 0, 0, 0, 0 };
>> int ccs_cap = ccs_cap_mode[inst];
>> @@ -646,6 +657,7 @@ static int vivid_create_instance(struct platform_device
>> *pdev, int inst)
>> struct video_device *vfd;
>> struct vb2_queue *q;
>> unsigned node_type = node_types[inst];
>> + unsigned int allocator = allocators[inst];
>> v4l2_std_id tvnorms_cap = 0, tvnorms_out = 0;
>> int ret;
>> int i;
>> @@ -1036,6 +1048,11 @@ static int vivid_create_instance(struct
>> platform_device *pdev, int inst)
>> if (!dev->cec_workqueue)
>> goto unreg_dev;
>>
>> + if (allocator == 1)
>> + dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
>> + else if (allocator >= ARRAY_SIZE(vivid_mem_ops))
>> + allocator = 0;
>> +
>> /* start creating the vb2 queues */
>> if (dev->has_vid_cap) {
>> /* initialize vid_cap queue */
>> @@ -1046,10 +1063,11 @@ static int vivid_create_instance(struct
>> platform_device *pdev, int inst)
>> q->drv_priv = dev;
>> q->buf_struct_size = sizeof(struct vivid_buffer);
>> q->ops = &vivid_vid_cap_qops;
>> - q->mem_ops = &vb2_vmalloc_memops;
>> + q->mem_ops = vivid_mem_ops[allocator];
>> q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>> q->min_buffers_needed = 2;
>> q->lock = &dev->mutex;
>> + q->dev = dev->v4l2_dev.dev;
>>
>> ret = vb2_queue_init(q);
>> if (ret)
>> @@ -1065,10 +1083,11 @@ static int vivid_create_instance(struct
>> platform_device *pdev, int inst)
>> q->drv_priv = dev;
>> q->buf_struct_size = sizeof(struct vivid_buffer);
>> q->ops = &vivid_vid_out_qops;
>> - q->mem_ops = &vb2_vmalloc_memops;
>> + q->mem_ops = vivid_mem_ops[allocator];
>> q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>> q->min_buffers_needed = 2;
>> q->lock = &dev->mutex;
>> + q->dev = dev->v4l2_dev.dev;
>>
>> ret = vb2_queue_init(q);
>> if (ret)
>> @@ -1084,10 +1103,11 @@ static int vivid_create_instance(struct
>> platform_device *pdev, int inst)
>> q->drv_priv = dev;
>> q->buf_struct_size = sizeof(struct vivid_buffer);
>> q->ops = &vivid_vbi_cap_qops;
>> - q->mem_ops = &vb2_vmalloc_memops;
>> + q->mem_ops = vivid_mem_ops[allocator];
>> q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>> q->min_buffers_needed = 2;
>> q->lock = &dev->mutex;
>> + q->dev = dev->v4l2_dev.dev;
>>
>> ret = vb2_queue_init(q);
>> if (ret)
>> @@ -1103,10 +1123,11 @@ static int vivid_create_instance(struct
>> platform_device *pdev, int inst)
>> q->drv_priv = dev;
>> q->buf_struct_size = sizeof(struct vivid_buffer);
>> q->ops = &vivid_vbi_out_qops;
>> - q->mem_ops = &vb2_vmalloc_memops;
>> + q->mem_ops = vivid_mem_ops[allocator];
>> q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>> q->min_buffers_needed = 2;
>> q->lock = &dev->mutex;
>> + q->dev = dev->v4l2_dev.dev;
>>
>> ret = vb2_queue_init(q);
>> if (ret)
>> @@ -1121,10 +1142,11 @@ static int vivid_create_instance(struct
>> platform_device *pdev, int inst)
>> q->drv_priv = dev;
>> q->buf_struct_size = sizeof(struct vivid_buffer);
>> q->ops = &vivid_sdr_cap_qops;
>> - q->mem_ops = &vb2_vmalloc_memops;
>> + q->mem_ops = vivid_mem_ops[allocator];
>> q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>> q->min_buffers_needed = 8;
>> q->lock = &dev->mutex;
>> + q->dev = dev->v4l2_dev.dev;
>>
>> ret = vb2_queue_init(q);
>> if (ret)
>>
>--
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