linux-kernel - Re: [PATCH 03/33] iris: vidc: add v4l2 wrapper file

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Message-ID: <20230728162330.GD1428172@hu-bjorande-lv.qualcomm.com>
Date:   Fri, 28 Jul 2023 09:23:30 -0700
From:   Bjorn Andersson <quic_bjorande@...cinc.com>
To:     Vikash Garodia <quic_vgarodia@...cinc.com>
CC:     <stanimir.k.varbanov@...il.com>, <agross@...nel.org>,
        <andersson@...nel.org>, <konrad.dybcio@...aro.org>,
        <mchehab@...nel.org>, <hans.verkuil@...co.com>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <quic_dikshita@...cinc.com>
Subject: Re: [PATCH 03/33] iris: vidc: add v4l2 wrapper file

On Fri, Jul 28, 2023 at 06:53:14PM +0530, Vikash Garodia wrote:
> Here is the implementation of v4l2 wrapper functions for all
> v4l2 IOCTLs.
> 
> Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
> Signed-off-by: Vikash Garodia <quic_vgarodia@...cinc.com>

In patch 2 you got this right, where the first Signed-off-by is that of
the author (defined by a From:), in the rest you should up as the
author, but Dikshita was the first one certifying the origin of this
code.

I suspect you need a Co-developed-by: Dikshita throughout the series?


Your subject should include the subsystem prefix (media: ), it's not
clear from the presented description if the "vidc" string adds value -
are there other functionality under iris?

For all the patches, do read:
https://www.kernel.org/doc/html/latest/process/submitting-patches.html#describe-your-changes


> ---
>  .../platform/qcom/iris/vidc/inc/msm_vidc_v4l2.h    |  77 ++
>  .../platform/qcom/iris/vidc/src/msm_vidc_v4l2.c    | 953 +++++++++++++++++++++
>  2 files changed, 1030 insertions(+)
>  create mode 100644 drivers/media/platform/qcom/iris/vidc/inc/msm_vidc_v4l2.h
>  create mode 100644 drivers/media/platform/qcom/iris/vidc/src/msm_vidc_v4l2.c
> 
> diff --git a/drivers/media/platform/qcom/iris/vidc/inc/msm_vidc_v4l2.h b/drivers/media/platform/qcom/iris/vidc/inc/msm_vidc_v4l2.h
> new file mode 100644
> index 0000000..3766c9d
> --- /dev/null
> +++ b/drivers/media/platform/qcom/iris/vidc/inc/msm_vidc_v4l2.h
> @@ -0,0 +1,77 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#ifndef _MSM_VIDC_V4L2_H_
> +#define _MSM_VIDC_V4L2_H_
> +
> +#include <linux/fs.h>
> +#include <linux/poll.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-dev.h>
> +#include <media/v4l2-ioctl.h>
> +
> +int msm_v4l2_open(struct file *filp);

We already have a v4l2 driver for msm platforms.

If it is concluded that there needs to be two (as was asked by others),
then this isn't "the one and only MSM video codec/controller/c???
driver". This would be the qcom_iris_ driver, or something along those
lines. All functions, variables, defines etc should be named
accordingly.

Regards,
Bjorn