linux-kernel - Re: [PATCH 07/10] venus: helpers: add three more helper functions

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Date:   Thu, 24 Jan 2019 17:43:24 +0900
From:   Alexandre Courbot <acourbot@...omium.org>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:     Linux Media Mailing List <linux-media@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org,
        Vikash Garodia <vgarodia@...eaurora.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Malathi Gottam <mgottam@...eaurora.org>
Subject: Re: [PATCH 07/10] venus: helpers: add three more helper functions

On Fri, Jan 18, 2019 at 1:21 AM Stanimir Varbanov
<stanimir.varbanov@...aro.org> wrote:
>
> This adds three more helper functions:
>  * for internal buffers reallocation, applicable when we are doing
> dynamic resolution change
>  * for initial buffer processing of capture and output queue buffer
> types
>
> All of them will be needed for stateful Codec API support.
>
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
> ---
>  drivers/media/platform/qcom/venus/helpers.c | 82 +++++++++++++++++++++
>  drivers/media/platform/qcom/venus/helpers.h |  2 +
>  2 files changed, 84 insertions(+)
>
> diff --git a/drivers/media/platform/qcom/venus/helpers.c b/drivers/media/platform/qcom/venus/helpers.c
> index f33bbfea3576..637ce7b82d94 100644
> --- a/drivers/media/platform/qcom/venus/helpers.c
> +++ b/drivers/media/platform/qcom/venus/helpers.c
> @@ -322,6 +322,52 @@ int venus_helper_intbufs_free(struct venus_inst *inst)
>  }
>  EXPORT_SYMBOL_GPL(venus_helper_intbufs_free);
>
> +int venus_helper_intbufs_realloc(struct venus_inst *inst)

Does this function actually reallocate buffers? It seems to just free
what we had previously.


> +{
> +       enum hfi_version ver = inst->core->res->hfi_version;
> +       struct hfi_buffer_desc bd;
> +       struct intbuf *buf, *n;
> +       int ret;
> +
> +       list_for_each_entry_safe(buf, n, &inst->internalbufs, list) {
> +               if (buf->type == HFI_BUFFER_INTERNAL_PERSIST ||
> +                   buf->type == HFI_BUFFER_INTERNAL_PERSIST_1)
> +                       continue;
> +
> +               memset(&bd, 0, sizeof(bd));
> +               bd.buffer_size = buf->size;
> +               bd.buffer_type = buf->type;
> +               bd.num_buffers = 1;
> +               bd.device_addr = buf->da;
> +               bd.response_required = true;
> +
> +               ret = hfi_session_unset_buffers(inst, &bd);
> +
> +               dma_free_attrs(inst->core->dev, buf->size, buf->va, buf->da,
> +                              buf->attrs);
> +
> +               list_del_init(&buf->list);
> +               kfree(buf);
> +       }
> +
> +       ret = intbufs_set_buffer(inst, HFI_BUFFER_INTERNAL_SCRATCH(ver));
> +       if (ret)
> +               goto err;
> +
> +       ret = intbufs_set_buffer(inst, HFI_BUFFER_INTERNAL_SCRATCH_1(ver));
> +       if (ret)
> +               goto err;
> +
> +       ret = intbufs_set_buffer(inst, HFI_BUFFER_INTERNAL_SCRATCH_2(ver));
> +       if (ret)
> +               goto err;
> +
> +       return 0;
> +err:
> +       return ret;
> +}
> +EXPORT_SYMBOL_GPL(venus_helper_intbufs_realloc);
> +
>  static u32 load_per_instance(struct venus_inst *inst)
>  {
>         u32 mbs;
> @@ -1050,6 +1096,42 @@ void venus_helper_vb2_stop_streaming(struct vb2_queue *q)
>  }
>  EXPORT_SYMBOL_GPL(venus_helper_vb2_stop_streaming);
>
> +int venus_helper_process_initial_cap_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);
> +                       return ret;
> +               }
> +       }
> +
> +       return 0;
> +}
> +EXPORT_SYMBOL_GPL(venus_helper_process_initial_cap_bufs);
> +
> +int venus_helper_process_initial_out_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_src_buf_safe(m2m_ctx, buf, n) {
> +               ret = session_process_buf(inst, &buf->vb);
> +               if (ret) {
> +                       return_buf_error(inst, &buf->vb);
> +                       return ret;
> +               }
> +       }
> +
> +       return 0;
> +}
> +EXPORT_SYMBOL_GPL(venus_helper_process_initial_out_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 24faae5abd93..2ec1c1a8b416 100644
> --- a/drivers/media/platform/qcom/venus/helpers.h
> +++ b/drivers/media/platform/qcom/venus/helpers.h
> @@ -69,4 +69,6 @@ int venus_helper_intbufs_realloc(struct venus_inst *inst);
>  int venus_helper_queue_dpb_bufs(struct venus_inst *inst);
>  int venus_helper_unregister_bufs(struct venus_inst *inst);
>  int venus_helper_load_scale_clocks(struct venus_core *core);
> +int venus_helper_process_initial_cap_bufs(struct venus_inst *inst);
> +int venus_helper_process_initial_out_bufs(struct venus_inst *inst);
>  #endif
> --
> 2.17.1
>