linux-kernel - Re: [PATCH] media: venus: queue initial buffers

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Date:   Thu, 1 Nov 2018 14:26:01 +0200
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     mgottam@...eaurora.org,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:     hverkuil@...all.nl, mchehab@...nel.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, acourbot@...omium.org,
        vgarodia@...eaurora.org
Subject: Re: [PATCH] media: venus: queue initial buffers

Hi,

On 10/20/18 10:50 AM, mgottam@...eaurora.org wrote:
> On 2018-10-09 20:47, Stanimir Varbanov wrote:
>> Hi Malathi,
>>
>> On 10/09/2018 10:50 AM, Malathi Gottam wrote:
>>> Buffers can be queued to driver before the planes are
>>> set to start streaming. Queue those buffers to firmware
>>> once start streaming is called on both the planes.
>>
>> yes and this is done in venus_helper_m2m_device_run mem2mem operation
>> when streamon on both queues is called, thus below function just
>> duplicates .device_run.
>>
>> Do you fix an issue with that patch?
>>
>>>
>>> Signed-off-by: Malathi Gottam <mgottam@...eaurora.org>
>>> ---
>>>  drivers/media/platform/qcom/venus/helpers.c | 22 ++++++++++++++++++++++
>>>  drivers/media/platform/qcom/venus/helpers.h |  1 +
>>>  drivers/media/platform/qcom/venus/venc.c    |  5 +++++
>>>  3 files changed, 28 insertions(+)
>>>
>>> diff --git a/drivers/media/platform/qcom/venus/helpers.c
>>> b/drivers/media/platform/qcom/venus/helpers.c
>>> index e436385..2679adb 100644
>>> --- a/drivers/media/platform/qcom/venus/helpers.c
>>> +++ b/drivers/media/platform/qcom/venus/helpers.c
>>> @@ -1041,6 +1041,28 @@ void venus_helper_vb2_stop_streaming(struct
>>> vb2_queue *q)
>>>  }
>>>  EXPORT_SYMBOL_GPL(venus_helper_vb2_stop_streaming);
>>>
>>> +int venus_helper_queue_initial_bufs(struct venus_inst *inst)
>>> +{
>>> +    struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
>>> +    struct v4l2_m2m_buffer *buf, *n;
>>> +    int ret;
>>> +
>>> +    v4l2_m2m_for_each_dst_buf_safe(m2m_ctx, buf, n)    {
>>> +        ret = session_process_buf(inst, &buf->vb);
>>> +        if (ret)
>>> +            return_buf_error(inst, &buf->vb);
>>> +    }
>>> +
>>> +    v4l2_m2m_for_each_src_buf_safe(m2m_ctx, buf, n) {
>>> +        ret = session_process_buf(inst, &buf->vb);
>>> +        if (ret)
>>> +            return_buf_error(inst, &buf->vb);
>>> +    }
>>> +
>>> +    return 0;
>>> +}
>>> +EXPORT_SYMBOL(venus_helper_queue_initial_bufs);
>>> +
>>>  int venus_helper_vb2_start_streaming(struct venus_inst *inst)
>>>  {
>>>      struct venus_core *core = inst->core;
>>> diff --git a/drivers/media/platform/qcom/venus/helpers.h
>>> b/drivers/media/platform/qcom/venus/helpers.h
>>> index 2475f284..f4d76ab 100644
>>> --- a/drivers/media/platform/qcom/venus/helpers.h
>>> +++ b/drivers/media/platform/qcom/venus/helpers.h
>>> @@ -31,6 +31,7 @@ void venus_helper_buffers_done(struct venus_inst
>>> *inst,
>>>  int venus_helper_vb2_start_streaming(struct venus_inst *inst);
>>>  void venus_helper_m2m_device_run(void *priv);
>>>  void venus_helper_m2m_job_abort(void *priv);
>>> +int venus_helper_queue_initial_bufs(struct venus_inst *inst);
>>>  int venus_helper_get_bufreq(struct venus_inst *inst, u32 type,
>>>                  struct hfi_buffer_requirements *req);
>>>  u32 venus_helper_get_framesz_raw(u32 hfi_fmt, u32 width, u32 height);
>>> diff --git a/drivers/media/platform/qcom/venus/venc.c
>>> b/drivers/media/platform/qcom/venus/venc.c
>>> index ce85962..ef11495 100644
>>> --- a/drivers/media/platform/qcom/venus/venc.c
>>> +++ b/drivers/media/platform/qcom/venus/venc.c
>>> @@ -989,6 +989,11 @@ static int venc_start_streaming(struct vb2_queue
>>> *q, unsigned int count)
>>>      if (ret)
>>>          goto deinit_sess;
>>>
>>> +    ret = venus_helper_queue_initial_bufs(inst);
>>> +    if (ret)
>>> +        goto deinit_sess;
>>> +    }
>>> +
>>>      mutex_unlock(&inst->lock);
>>>
>>>      return 0;
>>>
> Hi Stan,
> 
> As I considered playback sequence as well, this function
> "venus_helper_m2m_device_run" was muted as a part of it. So I had to
> explicitly implement this function for encoder.
> 
> For now, we can omit this patch. Once the playback sequence gets merged
> into upstream, we can re-look into this.

Sorry, I didn't look deeply into playback sequence patches yet, but
looks like we have to fix them first. So please drop this patch.

-- 
regards,
Stan