On 11/13/24 11:32, Dikshita Agarwal wrote:
>
>
> On 11/13/2024 2:52 PM, Hans Verkuil wrote:
>> On 13/11/2024 10:00, Dikshita Agarwal wrote:
>>>
>>>
>>> On 11/13/2024 1:18 PM, Hans Verkuil wrote:
>>>> On 13/11/2024 07:19, Dikshita Agarwal wrote:
>>>>>
>>>>>
>>>>> On 11/12/2024 3:20 PM, Hans Verkuil wrote:
>>>>>> On 05/11/2024 07:55, Dikshita Agarwal wrote:
>>>>>>> Implement reqbuf IOCTL op and vb2_queue_setup vb2 op in the driver with
>>>>>>> necessary hooks.
>>>>>>>
>>>>>>> Signed-off-by: Dikshita Agarwal <quic_dikshita@xxxxxxxxxxx>
>>>>>>> ---
>>>>
>>>> <snip>
>>>>
>>>>>>> diff --git a/drivers/media/platform/qcom/iris/iris_vb2.c b/drivers/media/platform/qcom/iris/iris_vb2.c
>>>>>>> new file mode 100644
>>>>>>> index 000000000000..61033f95cdba
>>>>>>> --- /dev/null
>>>>>>> +++ b/drivers/media/platform/qcom/iris/iris_vb2.c
>>>>>>> @@ -0,0 +1,74 @@
>>>>>>> +// SPDX-License-Identifier: GPL-2.0-only
>>>>>>> +/*
>>>>>>> + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
>>>>>>> + */
>>>>>>> +
>>>>>>> +#include "iris_buffer.h"
>>>>>>> +#include "iris_instance.h"
>>>>>>> +#include "iris_vb2.h"
>>>>>>> +#include "iris_vpu_buffer.h"
>>>>>>> +
>>>>>>> +int iris_vb2_queue_setup(struct vb2_queue *q,
>>>>>>> + unsigned int *num_buffers, unsigned int *num_planes,
>>>>>>> + unsigned int sizes[], struct device *alloc_devs[])
>>>>>>> +{
>>>>>>> + enum iris_buffer_type buffer_type = 0;
>>>>>>> + struct iris_buffers *buffers;
>>>>>>> + struct iris_inst *inst;
>>>>>>> + struct iris_core *core;
>>>>>>> + struct v4l2_format *f;
>>>>>>> + int ret = 0;
>>>>>>> +
>>>>>>> + inst = vb2_get_drv_priv(q);
>>>>>>> +
>>>>>>> + mutex_lock(&inst->lock);
>>>>>>> +
>>>>>>> + core = inst->core;
>>>>>>> + f = V4L2_TYPE_IS_OUTPUT(q->type) ? inst->fmt_src : inst->fmt_dst;
>>>>>>> +
>>>>>>> + if (*num_planes) {
>>>>>>> + if (*num_planes != f->fmt.pix_mp.num_planes ||
>>>>>>> + sizes[0] < f->fmt.pix_mp.plane_fmt[0].sizeimage)
>>>>>>> + ret = -EINVAL;
>>>>>>> + goto unlock;
>>>>>>> + }
>>>>>>> +
>>>>>>> + buffer_type = iris_v4l2_type_to_driver(q->type);
>>>>>>> + if (buffer_type == -EINVAL) {
>>>>>>
>>>>>> Can this ever fail?
>>>>>>
>>>>> If the q->type passed is not supported by driver then it can fail.
>>>>
>>>> But it is the driver that sets q->type when the vb2_queue is initialized.
>>>> So it makes no sense to test it here, it would be a driver bug if this fails.
>>>>
>>> Ok, Will remove this check.
>>>>>>> + ret = -EINVAL;
>>>>>>> + goto unlock;
>>>>>>> + }
>>>>>>> +
>>>>>>> + if (!inst->once_per_session_set) {
>>>>>>> + inst->once_per_session_set = true;
>>>>>>> +
>>>>>>> + ret = core->hfi_ops->session_open(inst);
>>>>>>> + if (ret) {
>>>>>>> + ret = -EINVAL;
>>>>>>> + dev_err(core->dev, "session open failed\n");
>>>>>>> + goto unlock;
>>>>>>> + }
>>>>>>> + }
>>>>>>> +
>>>>>>> + buffers = &inst->buffers[buffer_type];
>>>>>>> + if (!buffers) {
>>>>>>
>>>>>> This definitely can never fail.
>>>>>>
>>>>> Right, will remove the check.
>>>>>>> + ret = -EINVAL;
>>>>>>> + goto unlock;
>>>>>>> + }
>>>>>>> +
>>>>>>> + buffers->min_count = iris_vpu_buf_count(inst, buffer_type);
>>>>>>> + buffers->actual_count = *num_buffers;
>>>>>>
>>>>>> Don't mirror the number of buffers in actual_count, instead just always
>>>>>> ask for the number of buffers using vb2_get_num_buffers().
>>>>>>
>>>>>> This code is wrong anyway, since actual_count isn't updated if more
>>>>>> buffers are added using VIDIOC_CREATEBUFS.
>>>>>>
>>>>> Ok, so below would fix the VIDIOC_CREATEBUFS as well, right?
>>>>> - buffers->actual_count = *num_buffers;
>>>>> + buffers->actual_count = vb2_get_num_buffers();
>>> Does this look good?
>>
>> No. You shouldn't have the actual_count field at all, especially since I see that
>> you set it in several places. vb2_get_num_buffers() reports the current number of
>> buffers, which can change if userspace calls VIDIOC_CREATE_BUFS or REMOVE_BUFS.
>>
>> You shouldn't try to mirror that value yourself. If you need that information,
>> then call vb2_get_num_buffers().
>>
>> There are weird things going on in your driver w.r.t. actual_count and also min_count
>> (and I saw a count_actual as well, very confusing).
>>
>> I'm not sure what you are trying to achieve, but it doesn't look right.
>>
> We need to set the value of actual buffers being queued to firmware via a
> property, for that we are caching the value in actual_count so that we can
> set it to fw when needed.
So do you need to know the number of allocated buffers, or the number of
buffers queued to the device instance?
The first is reported by vb2_get_num_buffers(), the second is something
you can keep track of yourself: a buffer is queued in the buf_queue op and
dequeued when vb2_buffer_done is called. But this has nothing to do with
what happens in queue_setup.
Regards,
Hans
>
> count_actual is the variable of the hfi struture being filled to set the
> property to fw,
> ---
> u32 ptype = HFI_PROPERTY_PARAM_BUFFER_COUNT_ACTUAL;
> struct hfi_buffer_count_actual buf_count;
> int ret;
>
> buf_count.type = HFI_BUFFER_INPUT;
> buf_count.count_actual = inst->buffers[BUF_INPUT].actual_count;
> ---
>
> Calling vb2_get_num_buffers from HFI layer will violate the current design
> of driver so will need to cache this info in upper layer, best place to do
> that seems to be queue_setup which is called from both VIDIOC_REQBUFS and
> VIDIOC_CREATE_BUFS.
> Any other suggestions for the same?
>
> To avoid the confusion, I can rename the actual_count to count_actual to
> match with hfi structure.
> Also, I can cleanup some part of driver where this variable is being
> updated un-necessarily.
> This is only needed to set the property to firmware as explained above.
>
> min_count holds the min numbers of buffer needed by firmware for the
> particluar session, it can be changed by firmware if source changes.
>
> Thanks,
> Dikshita
>> Regards,
>>
>> Hans
>>
>>>
>>> Thanks,
>>> Dikshita
>>>>>>> + *num_planes = 1;
>>>>>>> +
>>>>>>> + buffers->size = iris_get_buffer_size(inst, buffer_type);
>>>>>>> +
>>>>>>> + if (sizes[0] < buffers->size) {
>>>>>>> + f->fmt.pix_mp.plane_fmt[0].sizeimage = buffers->size;
>>>>>>
>>>>>> Isn't this something that is set in VIDIOC_S_FMT? Can what iris_get_buffer_size
>>>>>> returns here be different from what VIDIOC_S_FMT does?
>>>>>>
>>>>>> This is weird code, I don't think it belong in queue_setup. If iris_get_buffer_size
>>>>>> can really give a different result, then it needs to be explained carefully, since
>>>>>> that would be unexpected and possibly non-compliant.
>>>>>>
>>>>> I remember adding this particular change to fix a compliance issue.
>>>>> But when I checked again without this change, compliance is passing now, so
>>>>> will remove this in next version.
>>>>
>>>> Ah, good!
>>>>
>>>> Regards,
>>>>
>>>> Hans
>>>>
>>>>>
>>>>>
>>>>> Thanks,
>>>>> Dikshita
>>>>>>> + sizes[0] = f->fmt.pix_mp.plane_fmt[0].sizeimage;
>>>>>>> + }
>>>>>>> +
>>>>>>> +unlock:
>>>>>>> + mutex_unlock(&inst->lock);
>>>>>>> +
>>>>>>> + return ret;
>>>>>>> +}
>>>>>>> diff --git a/drivers/media/platform/qcom/iris/iris_vb2.h b/drivers/media/platform/qcom/iris/iris_vb2.h
>>>>>>> new file mode 100644
>>>>>>> index 000000000000..78157a97b86e
>>>>>>> --- /dev/null
>>>>>>> +++ b/drivers/media/platform/qcom/iris/iris_vb2.h
>>>>>>> @@ -0,0 +1,12 @@
>>>>>>> +/* SPDX-License-Identifier: GPL-2.0-only */
>>>>>>> +/*
>>>>>>> + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
>>>>>>> + */
>>>>>>> +
>>>>>>> +#ifndef _IRIS_VB2_H_
>>>>>>> +#define _IRIS_VB2_H_
>>>>>>> +
>>>>>>> +int iris_vb2_queue_setup(struct vb2_queue *q,
>>>>>>> + unsigned int *num_buffers, unsigned int *num_planes,
>>>>>>> + unsigned int sizes[], struct device *alloc_devs[]);
>>>>>>> +#endif
>>>>>>> diff --git a/drivers/media/platform/qcom/iris/iris_vdec.c b/drivers/media/platform/qcom/iris/iris_vdec.c
>>>>>>> new file mode 100644
>>>>>>> index 000000000000..7d1ef31c7c44
>>>>>>> --- /dev/null
>>>>>>> +++ b/drivers/media/platform/qcom/iris/iris_vdec.c
>>>>>>> @@ -0,0 +1,58 @@
>>>>>>> +// SPDX-License-Identifier: GPL-2.0-only
>>>>>>> +/*
>>>>>>> + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
>>>>>>> + */
>>>>>>> +
>>>>>>> +#include "iris_buffer.h"
>>>>>>> +#include "iris_instance.h"
>>>>>>> +#include "iris_vdec.h"
>>>>>>> +#include "iris_vpu_buffer.h"
>>>>>>> +
>>>>>>> +#define DEFAULT_WIDTH 320
>>>>>>> +#define DEFAULT_HEIGHT 240
>>>>>>> +
>>>>>>> +void iris_vdec_inst_init(struct iris_inst *inst)
>>>>>>> +{
>>>>>>> + struct v4l2_format *f;
>>>>>>> +
>>>>>>> + inst->fmt_src = kzalloc(sizeof(*inst->fmt_src), GFP_KERNEL);
>>>>>>> + inst->fmt_dst = kzalloc(sizeof(*inst->fmt_dst), GFP_KERNEL);
>>>>>>> +
>>>>>>> + inst->fw_min_count = MIN_BUFFERS;
>>>>>>> +
>>>>>>> + f = inst->fmt_src;
>>>>>>> + f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
>>>>>>> + f->fmt.pix_mp.width = DEFAULT_WIDTH;
>>>>>>> + f->fmt.pix_mp.height = DEFAULT_HEIGHT;
>>>>>>> + f->fmt.pix_mp.pixelformat = V4L2_PIX_FMT_H264;
>>>>>>> + f->fmt.pix_mp.num_planes = 1;
>>>>>>> + f->fmt.pix_mp.plane_fmt[0].bytesperline = 0;
>>>>>>> + f->fmt.pix_mp.plane_fmt[0].sizeimage = iris_get_buffer_size(inst, BUF_INPUT);
>>>>>>> + f->fmt.pix_mp.field = V4L2_FIELD_NONE;
>>>>>>> + inst->buffers[BUF_INPUT].min_count = iris_vpu_buf_count(inst, BUF_INPUT);
>>>>>>> + inst->buffers[BUF_INPUT].actual_count = inst->buffers[BUF_INPUT].min_count;
>>>>>>> + inst->buffers[BUF_INPUT].size = f->fmt.pix_mp.plane_fmt[0].sizeimage;
>>>>>>> +
>>>>>>> + f = inst->fmt_dst;
>>>>>>> + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
>>>>>>> + f->fmt.pix_mp.pixelformat = V4L2_PIX_FMT_NV12;
>>>>>>> + f->fmt.pix_mp.width = ALIGN(DEFAULT_WIDTH, 128);
>>>>>>> + f->fmt.pix_mp.height = ALIGN(DEFAULT_HEIGHT, 32);
>>>>>>> + f->fmt.pix_mp.num_planes = 1;
>>>>>>> + f->fmt.pix_mp.plane_fmt[0].bytesperline = ALIGN(DEFAULT_WIDTH, 128);
>>>>>>> + f->fmt.pix_mp.plane_fmt[0].sizeimage = iris_get_buffer_size(inst, BUF_OUTPUT);
>>>>>>> + f->fmt.pix_mp.field = V4L2_FIELD_NONE;
>>>>>>> + f->fmt.pix_mp.colorspace = V4L2_COLORSPACE_DEFAULT;
>>>>>>> + f->fmt.pix_mp.xfer_func = V4L2_XFER_FUNC_DEFAULT;
>>>>>>> + f->fmt.pix_mp.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
>>>>>>> + f->fmt.pix_mp.quantization = V4L2_QUANTIZATION_DEFAULT;
>>>>>>> + inst->buffers[BUF_OUTPUT].min_count = iris_vpu_buf_count(inst, BUF_OUTPUT);
>>>>>>> + inst->buffers[BUF_OUTPUT].actual_count = inst->buffers[BUF_OUTPUT].min_count;
>>>>>>> + inst->buffers[BUF_OUTPUT].size = f->fmt.pix_mp.plane_fmt[0].sizeimage;
>>>>>>> +}
>>>>>>> +
>>>>>>> +void iris_vdec_inst_deinit(struct iris_inst *inst)
>>>>>>> +{
>>>>>>> + kfree(inst->fmt_dst);
>>>>>>> + kfree(inst->fmt_src);
>>>>>>> +}
>>>>>>> diff --git a/drivers/media/platform/qcom/iris/iris_vdec.h b/drivers/media/platform/qcom/iris/iris_vdec.h
>>>>>>> new file mode 100644
>>>>>>> index 000000000000..0324d7f796dd
>>>>>>> --- /dev/null
>>>>>>> +++ b/drivers/media/platform/qcom/iris/iris_vdec.h
>>>>>>> @@ -0,0 +1,14 @@
>>>>>>> +/* SPDX-License-Identifier: GPL-2.0-only */
>>>>>>> +/*
>>>>>>> + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
>>>>>>> + */
>>>>>>> +
>>>>>>> +#ifndef _IRIS_VDEC_H_
>>>>>>> +#define _IRIS_VDEC_H_
>>>>>>> +
>>>>>>> +struct iris_inst;
>>>>>>> +
>>>>>>> +void iris_vdec_inst_init(struct iris_inst *inst);
>>>>>>> +void iris_vdec_inst_deinit(struct iris_inst *inst);
>>>>>>> +
>>>>>>> +#endif
>>>>>>> diff --git a/drivers/media/platform/qcom/iris/iris_vidc.c b/drivers/media/platform/qcom/iris/iris_vidc.c
>>>>>>> index b8654e73f516..ab3b63171c1d 100644
>>>>>>> --- a/drivers/media/platform/qcom/iris/iris_vidc.c
>>>>>>> +++ b/drivers/media/platform/qcom/iris/iris_vidc.c
>>>>>>> @@ -9,6 +9,9 @@
>>>>>>>
>>>>>>> #include "iris_vidc.h"
>>>>>>> #include "iris_instance.h"
>>>>>>> +#include "iris_vdec.h"
>>>>>>> +#include "iris_vb2.h"
>>>>>>> +#include "iris_vpu_buffer.h"
>>>>>>> #include "iris_platform_common.h"
>>>>>>>
>>>>>>> #define IRIS_DRV_NAME "iris_driver"
>>>>>>> @@ -28,6 +31,38 @@ static void iris_v4l2_fh_deinit(struct iris_inst *inst)
>>>>>>> v4l2_fh_exit(&inst->fh);
>>>>>>> }
>>>>>>>
>>>>>>> +static void iris_add_session(struct iris_inst *inst)
>>>>>>> +{
>>>>>>> + struct iris_core *core = inst->core;
>>>>>>> + struct iris_inst *iter;
>>>>>>> + u32 count = 0;
>>>>>>> +
>>>>>>> + mutex_lock(&core->lock);
>>>>>>> +
>>>>>>> + list_for_each_entry(iter, &core->instances, list)
>>>>>>> + count++;
>>>>>>> +
>>>>>>> + if (count < core->iris_platform_data->max_session_count)
>>>>>>> + list_add_tail(&inst->list, &core->instances);
>>>>>>> +
>>>>>>> + mutex_unlock(&core->lock);
>>>>>>> +}
>>>>>>> +
>>>>>>> +static void iris_remove_session(struct iris_inst *inst)
>>>>>>> +{
>>>>>>> + struct iris_core *core = inst->core;
>>>>>>> + struct iris_inst *iter, *temp;
>>>>>>> +
>>>>>>> + mutex_lock(&core->lock);
>>>>>>> + list_for_each_entry_safe(iter, temp, &core->instances, list) {
>>>>>>> + if (iter->session_id == inst->session_id) {
>>>>>>> + list_del_init(&iter->list);
>>>>>>> + break;
>>>>>>> + }
>>>>>>> + }
>>>>>>> + mutex_unlock(&core->lock);
>>>>>>> +}
>>>>>>> +
>>>>>>> static inline struct iris_inst *iris_get_inst(struct file *filp, void *fh)
>>>>>>> {
>>>>>>> return container_of(filp->private_data, struct iris_inst, fh);
>>>>>>> @@ -59,7 +94,10 @@ iris_m2m_queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_
>>>>>>> src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
>>>>>>> src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
>>>>>>> src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
>>>>>>> + src_vq->ops = inst->core->iris_vb2_ops;
>>>>>>> src_vq->drv_priv = inst;
>>>>>>> + src_vq->buf_struct_size = sizeof(struct iris_buffer);
>>>>>>> + src_vq->min_reqbufs_allocation = MIN_BUFFERS;
>>>>>>> src_vq->dev = inst->core->dev;
>>>>>>> src_vq->lock = &inst->ctx_q_lock;
>>>>>>> ret = vb2_queue_init(src_vq);
>>>>>>> @@ -69,7 +107,10 @@ iris_m2m_queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_
>>>>>>> dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
>>>>>>> dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
>>>>>>> dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
>>>>>>> + dst_vq->ops = inst->core->iris_vb2_ops;
>>>>>>> dst_vq->drv_priv = inst;
>>>>>>> + dst_vq->buf_struct_size = sizeof(struct iris_buffer);
>>>>>>> + dst_vq->min_reqbufs_allocation = MIN_BUFFERS;
>>>>>>> dst_vq->dev = inst->core->dev;
>>>>>>> dst_vq->lock = &inst->ctx_q_lock;
>>>>>>>
>>>>>>> @@ -100,8 +141,11 @@ int iris_open(struct file *filp)
>>>>>>> return -ENOMEM;
>>>>>>>
>>>>>>> inst->core = core;
>>>>>>> + inst->session_id = hash32_ptr(inst);
>>>>>>>
>>>>>>> + mutex_init(&inst->lock);
>>>>>>> mutex_init(&inst->ctx_q_lock);
>>>>>>> + init_completion(&inst->completion);
>>>>>>>
>>>>>>> iris_v4l2_fh_init(inst);
>>>>>>>
>>>>>>> @@ -117,6 +161,10 @@ int iris_open(struct file *filp)
>>>>>>> goto fail_m2m_release;
>>>>>>> }
>>>>>>>
>>>>>>> + iris_vdec_inst_init(inst);
>>>>>>> +
>>>>>>> + iris_add_session(inst);
>>>>>>> +
>>>>>>> inst->fh.m2m_ctx = inst->m2m_ctx;
>>>>>>> filp->private_data = &inst->fh;
>>>>>>>
>>>>>>> @@ -127,19 +175,42 @@ int iris_open(struct file *filp)
>>>>>>> fail_v4l2_fh_deinit:
>>>>>>> iris_v4l2_fh_deinit(inst);
>>>>>>> mutex_destroy(&inst->ctx_q_lock);
>>>>>>> + mutex_destroy(&inst->lock);
>>>>>>> kfree(inst);
>>>>>>>
>>>>>>> return ret;
>>>>>>> }
>>>>>>>
>>>>>>> +static void iris_session_close(struct iris_inst *inst)
>>>>>>> +{
>>>>>>> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
>>>>>>> + bool wait_for_response = true;
>>>>>>> + int ret;
>>>>>>> +
>>>>>>> + reinit_completion(&inst->completion);
>>>>>>> +
>>>>>>> + ret = hfi_ops->session_close(inst);
>>>>>>> + if (ret)
>>>>>>> + wait_for_response = false;
>>>>>>> +
>>>>>>> + if (wait_for_response)
>>>>>>> + iris_wait_for_session_response(inst);
>>>>>>> +}
>>>>>>> +
>>>>>>> int iris_close(struct file *filp)
>>>>>>> {
>>>>>>> struct iris_inst *inst = iris_get_inst(filp, NULL);
>>>>>>>
>>>>>>> v4l2_m2m_ctx_release(inst->m2m_ctx);
>>>>>>> v4l2_m2m_release(inst->m2m_dev);
>>>>>>> + mutex_lock(&inst->lock);
>>>>>>> + iris_vdec_inst_deinit(inst);
>>>>>>> + iris_session_close(inst);
>>>>>>> iris_v4l2_fh_deinit(inst);
>>>>>>> + iris_remove_session(inst);
>>>>>>> + mutex_unlock(&inst->lock);
>>>>>>> mutex_destroy(&inst->ctx_q_lock);
>>>>>>> + mutex_destroy(&inst->lock);
>>>>>>> kfree(inst);
>>>>>>> filp->private_data = NULL;
>>>>>>>
>>>>>>> @@ -155,7 +226,17 @@ static struct v4l2_file_operations iris_v4l2_file_ops = {
>>>>>>> .mmap = v4l2_m2m_fop_mmap,
>>>>>>> };
>>>>>>>
>>>>>>> +static const struct vb2_ops iris_vb2_ops = {
>>>>>>> + .queue_setup = iris_vb2_queue_setup,
>>>>>>> +};
>>>>>>> +
>>>>>>> +static const struct v4l2_ioctl_ops iris_v4l2_ioctl_ops = {
>>>>>>> + .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
>>>>>>> +};
>>>>>>> +
>>>>>>> void iris_init_ops(struct iris_core *core)
>>>>>>> {
>>>>>>> core->iris_v4l2_file_ops = &iris_v4l2_file_ops;
>>>>>>> + core->iris_vb2_ops = &iris_vb2_ops;
>>>>>>> + core->iris_v4l2_ioctl_ops = &iris_v4l2_ioctl_ops;
>>>>>>> }
>>>>>>> diff --git a/drivers/media/platform/qcom/iris/iris_vpu_buffer.c b/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
>>>>>>> new file mode 100644
>>>>>>> index 000000000000..2402a33723ab
>>>>>>> --- /dev/null
>>>>>>> +++ b/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
>>>>>>> @@ -0,0 +1,19 @@
>>>>>>> +// SPDX-License-Identifier: GPL-2.0-only
>>>>>>> +/*
>>>>>>> + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
>>>>>>> + */
>>>>>>> +
>>>>>>> +#include "iris_instance.h"
>>>>>>> +#include "iris_vpu_buffer.h"
>>>>>>> +
>>>>>>> +int iris_vpu_buf_count(struct iris_inst *inst, enum iris_buffer_type buffer_type)
>>>>>>> +{
>>>>>>> + switch (buffer_type) {
>>>>>>> + case BUF_INPUT:
>>>>>>> + return MIN_BUFFERS;
>>>>>>> + case BUF_OUTPUT:
>>>>>>> + return inst->fw_min_count;
>>>>>>> + default:
>>>>>>> + return 0;
>>>>>>> + }
>>>>>>> +}
>>>>>>> diff --git a/drivers/media/platform/qcom/iris/iris_vpu_buffer.h b/drivers/media/platform/qcom/iris/iris_vpu_buffer.h
>>>>>>> new file mode 100644
>>>>>>> index 000000000000..f0f974cebd8a
>>>>>>> --- /dev/null
>>>>>>> +++ b/drivers/media/platform/qcom/iris/iris_vpu_buffer.h
>>>>>>> @@ -0,0 +1,15 @@
>>>>>>> +/* SPDX-License-Identifier: GPL-2.0-only */
>>>>>>> +/*
>>>>>>> + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
>>>>>>> + */
>>>>>>> +
>>>>>>> +#ifndef _IRIS_VPU_BUFFER_H_
>>>>>>> +#define _IRIS_VPU_BUFFER_H_
>>>>>>> +
>>>>>>> +struct iris_inst;
>>>>>>> +
>>>>>>> +#define MIN_BUFFERS 4
>>>>>>> +
>>>>>>> +int iris_vpu_buf_count(struct iris_inst *inst, enum iris_buffer_type buffer_type);
>>>>>>> +
>>>>>>> +#endif
>>>>>>>
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Hans
>>>>
>>
