linux-kernel - Re: [PATCH 00/10] Venus stateful Codec API

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Date:   Thu, 24 Jan 2019 17:43:13 +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 00/10] Venus stateful Codec API

Hi Stanimir,

On Fri, Jan 18, 2019 at 1:20 AM Stanimir Varbanov
<stanimir.varbanov@...aro.org> wrote:
>
> Hello,
>
> This aims to make Venus decoder compliant with stateful Codec API [1].
> The patches 1-9 are preparation for the cherry on the cake patch 10
> which implements the decoder state machine similar to the one in the
> stateful codec API documentation.

Thanks *a lot* for this series! I am still stress-testing it against
the Chromium decoder tests, but so far it has been rock-solid. I have
a few inline comments on some patches ; I will also want to review the
state machine more thoroughly after refreshing my mind on Tomasz doc,
but this looks pretty promising already.

Cheers,
Alex.

>
> There few things which are still TODO:
>  - V4L2_DEC_CMD_START implementation as per decoder documentation.
>  - Dynamic resolution change V4L2_BUF_FLAG_LAST for the last buffer
>    before the resolution change.
>
> The patches are tested with chromium VDA unittests at [2].
>
> Note that the patchset depends on Venus various fixes at [3].
>
> Comments are welcome!
>
> regards,
> Stan
>
> [1] https://patchwork.kernel.org/patch/10652199/
> [2] https://chromium.googlesource.com/chromium/src/+/lkgr/docs/media/gpu/vdatest_usage.md
> [3] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1894510.html
>
> Stanimir Varbanov (10):
>   venus: hfi_cmds: add more not-implemented properties
>   venus: helpers: fix dynamic buffer mode for v4
>   venus: helpers: export few helper functions
>   venus: hfi: add type argument to hfi flush function
>   venus: hfi: export few HFI functions
>   venus: hfi: return an error if session_init is already called
>   venus: helpers: add three more helper functions
>   venus: vdec_ctrls: get real minimum buffers for capture
>   venus: vdec: allow bigger sizeimage set by clients
>   venus: dec: make decoder compliant with stateful codec API
>
>  drivers/media/platform/qcom/venus/core.h      |  20 +-
>  drivers/media/platform/qcom/venus/helpers.c   | 141 +++++-
>  drivers/media/platform/qcom/venus/helpers.h   |  14 +
>  drivers/media/platform/qcom/venus/hfi.c       |  11 +-
>  drivers/media/platform/qcom/venus/hfi.h       |   2 +-
>  drivers/media/platform/qcom/venus/hfi_cmds.c  |   2 +
>  drivers/media/platform/qcom/venus/vdec.c      | 467 ++++++++++++++----
>  .../media/platform/qcom/venus/vdec_ctrls.c    |   7 +-
>  8 files changed, 535 insertions(+), 129 deletions(-)
>
> --
> 2.17.1
>