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Message-ID: <bb410fde0a2f50cc34840e091c3d9c1395601514.camel@collabora.com>
Date: Wed, 17 Feb 2021 17:45:48 -0300
From: Ezequiel Garcia <ezequiel@...labora.com>
To: Benjamin Gaignard <benjamin.gaignard@...labora.com>,
p.zabel@...gutronix.de, mchehab@...nel.org, robh+dt@...nel.org,
shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
festevam@...il.com, linux-imx@....com, gregkh@...uxfoundation.org,
mripard@...nel.org, paul.kocialkowski@...tlin.com, wens@...e.org,
jernej.skrabec@...l.net, krzk@...nel.org, shengjiu.wang@....com,
adrian.ratiu@...labora.com, aisheng.dong@....com, peng.fan@....com,
Anson.Huang@....com, hverkuil-cisco@...all.nl
Cc: linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
kernel@...labora.com
Subject: Re: [PATCH v1 13/18] media: hantro: Introduce G2/HEVC decoder
Hi Benjamin,
Before I review the implementation in detail,
there's one thing that looks suspicious.
On Wed, 2021-02-17 at 09:03 +0100, Benjamin Gaignard wrote:
> Implement all the logic to get G2 hardware decoding HEVC frames.
> It support up level 5.1 HEVC stream.
> It doesn't support yet 10 bits formats or scaling feature.
>
> Add HANTRO HEVC dedicated control to skip some bits at the beginning
> of the slice header. That is very specific to this hardware so can't
> go into uapi structures. Compute the needed value is complex and require
> information from the stream that only the userland knows so let it
> provide the correct value to the driver.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> Signed-off-by: Ezequiel Garcia <ezequiel@...labora.com>
> Signed-off-by: Adrian Ratiu <adrian.ratiu@...labora.com>
> ---
> drivers/staging/media/hantro/Makefile | 2 +
> drivers/staging/media/hantro/hantro_drv.c | 41 ++
> .../staging/media/hantro/hantro_g2_hevc_dec.c | 637 ++++++++++++++++++
> drivers/staging/media/hantro/hantro_g2_regs.h | 198 ++++++
> drivers/staging/media/hantro/hantro_hevc.c | 274 ++++++++
> drivers/staging/media/hantro/hantro_hw.h | 14 +
> 6 files changed, 1166 insertions(+)
> create mode 100644 drivers/staging/media/hantro/hantro_g2_hevc_dec.c
> create mode 100644 drivers/staging/media/hantro/hantro_g2_regs.h
> create mode 100644 drivers/staging/media/hantro/hantro_hevc.c
>
> diff --git a/drivers/staging/media/hantro/Makefile b/drivers/staging/media/hantro/Makefile
> index 743ce08eb184..0357f1772267 100644
> --- a/drivers/staging/media/hantro/Makefile
> +++ b/drivers/staging/media/hantro/Makefile
> @@ -9,12 +9,14 @@ hantro-vpu-y += \
> hantro_h1_jpeg_enc.o \
> hantro_g1_h264_dec.o \
> hantro_g1_mpeg2_dec.o \
> + hantro_g2_hevc_dec.o \
> hantro_g1_vp8_dec.o \
> rk3399_vpu_hw_jpeg_enc.o \
> rk3399_vpu_hw_mpeg2_dec.o \
> rk3399_vpu_hw_vp8_dec.o \
> hantro_jpeg.o \
> hantro_h264.o \
> + hantro_hevc.o \
> hantro_mpeg2.o \
> hantro_vp8.o
>
> diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
> index e1443c394f62..d171fb80876a 100644
> --- a/drivers/staging/media/hantro/hantro_drv.c
> +++ b/drivers/staging/media/hantro/hantro_drv.c
> @@ -280,6 +280,20 @@ static int hantro_jpeg_s_ctrl(struct v4l2_ctrl *ctrl)
> return 0;
> }
>
> +static int hantro_extra_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + const struct hantro_hevc_extra_decode_params *extra_params;
> + struct hantro_ctx *ctx;
> +
> + ctx = container_of(ctrl->handler,
> + struct hantro_ctx, ctrl_handler);
> + extra_params = &ctx->hevc_dec.ctrls.extra_params;
> +
> + memcpy((void *)extra_params, ctrl->p_new.p_u8, sizeof(extra_params));
> +
> + return 0;
> +}
> +
> static const struct v4l2_ctrl_ops hantro_ctrl_ops = {
> .try_ctrl = hantro_try_ctrl,
> };
> @@ -288,6 +302,10 @@ static const struct v4l2_ctrl_ops hantro_jpeg_ctrl_ops = {
> .s_ctrl = hantro_jpeg_s_ctrl,
> };
>
> +static const struct v4l2_ctrl_ops hantro_extra_ctrl_ops = {
> + .s_ctrl = hantro_extra_s_ctrl,
> +};
> +
> static const struct hantro_ctrl controls[] = {
> {
> .codec = HANTRO_JPEG_ENCODER,
> @@ -413,6 +431,29 @@ static const struct hantro_ctrl controls[] = {
> .cfg = {
> .id = V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS,
> },
> + }, {
> + .codec = HANTRO_HEVC_DECODER,
> + .cfg = {
> + .id = V4L2_CID_HANTRO_HEVC_EXTRA_DECODE_PARAMS,
> + .name = "HANTRO extra decode params",
> + .type = V4L2_CTRL_TYPE_U8,
> + .min = 0,
> + .def = 0,
> + .max = 255,
> + .step = 1,
> + .dims = { sizeof(struct hantro_hevc_extra_decode_params) },
> + .ops = &hantro_extra_ctrl_ops,
> + },
> + }, {
> + .codec = HANTRO_JPEG_ENCODER | HANTRO_MPEG2_DECODER |
> + HANTRO_VP8_DECODER | HANTRO_H264_DECODER |
> + HANTRO_HEVC_DECODER,
> + .cfg = {
> + .id = V4L2_CID_USER_CLASS,
Are you sure you need to expose the V4L2_CID_USER_CLASS?
Maybe I'm missing something, but this looks odd.
Thanks,
Ezequiel
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