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

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Date:   Thu, 24 Jan 2019 10:54:32 +0200
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     Alexandre Courbot <acourbot@...omium.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

Hi Alex,

Thanks for the review!

On 1/24/19 10:43 AM, Alexandre Courbot wrote:
> 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.

The function free all internal buffers except PERSIST. After that the
buffers are allocated in intbufs_set_buffer function (I know that the
function name is misleading).

> 
> 
>> +{
>> +       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);
>> +


-- 
regards,
Stan