Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.32 as permitted sender) client-ip=23.128.96.32;
Message-ID: <539d4f48-8c52-4b85-a0b3-ccd4039e299f@xs4all.nl>
Date:   Wed, 25 Oct 2023 12:32:20 +0200
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [RFC PATCH v7 09/13] media: uapi: Add V4L2_CTRL_CLASS_M2M_AUDIO
Content-Language: en-US, nl
To:     Shengjiu Wang <shengjiu.wang@nxp.com>, sakari.ailus@iki.fi,
        tfiga@chromium.org, m.szyprowski@samsung.com, mchehab@kernel.org,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        shengjiu.wang@gmail.com, Xiubo.Lee@gmail.com, festevam@gmail.com,
        nicoleotsuka@gmail.com, lgirdwood@gmail.com, broonie@kernel.org,
        perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org,
        linuxppc-dev@lists.ozlabs.org
References: <1697794232-2607-1-git-send-email-shengjiu.wang@nxp.com>
 <1697794232-2607-10-git-send-email-shengjiu.wang@nxp.com>
From:   Hans Verkuil <hverkuil@xs4all.nl>
Autocrypt: addr=hverkuil@xs4all.nl; keydata=
 xsFNBFQ84W0BEAC7EF1iL4s3tY8cRTVkJT/297h0Hz0ypA+ByVM4CdU9sN6ua/YoFlr9k0K4
 BFUlg7JzJoUuRbKxkYb8mmqOe722j7N3HO8+ofnio5cAP5W0WwDpM0kM84BeHU0aPSTsWiGR
 yw55SOK2JBSq7hueotWLfJLobMWhQii0Zd83hGT9SIt9uHaHjgwmtTH7MSTIiaY6N14nw2Ud
 C6Uykc1va0Wqqc2ov5ihgk/2k2SKa02ookQI3e79laOrbZl5BOXNKR9LguuOZdX4XYR3Zi6/
 BsJ7pVCK9xkiVf8svlEl94IHb+sa1KrlgGv3fn5xgzDw8Z222TfFceDL/2EzUyTdWc4GaPMC
 E/c1B4UOle6ZHg02+I8tZicjzj5+yffv1lB5A1btG+AmoZrgf0X2O1B96fqgHx8w9PIpVERN
 YsmkfxvhfP3MO3oHh8UY1OLKdlKamMneCLk2up1Zlli347KMjHAVjBAiy8qOguKF9k7HOjif
 JCLYTkggrRiEiE1xg4tblBNj8WGyKH+u/hwwwBqCd/Px2HvhAsJQ7DwuuB3vBAp845BJYUU3
 06kRihFqbO0vEt4QmcQDcbWINeZ2zX5TK7QQ91ldHdqJn6MhXulPKcM8tCkdD8YNXXKyKqNl
 UVqXnarz8m2JCbHgjEkUlAJCNd6m3pfESLZwSWsLYL49R5yxIwARAQABzSFIYW5zIFZlcmt1
 aWwgPGh2ZXJrdWlsQHhzNGFsbC5ubD7CwZUEEwECACgFAlQ84W0CGwMFCRLMAwAGCwkIBwMC
 BhUIAgkKCwQWAgMBAh4BAheAACEJEL0tYUhmFDtMFiEEBSzee8IVBTtonxvKvS1hSGYUO0wT
 7w//frEmPBAwu3OdvAk9VDkH7X+7RcFpiuUcJxs3Xl6jpaA+SdwtZra6W1uMrs2RW8eXXiq/
 80HXJtYnal1Y8MKUBoUVhT/+5+KcMyfVQK3VFRHnNxCmC9HZV+qdyxAGwIscUd4hSlweuU6L
 6tI7Dls6NzKRSTFbbGNZCRgl8OrF01TBH+CZrcFIoDgpcJA5Pw84mxo+wd2BZjPA4TNyq1od
 +slSRbDqFug1EqQaMVtUOdgaUgdlmjV0+GfBHoyCGedDE0knv+tRb8v5gNgv7M3hJO3Nrl+O
 OJVoiW0G6OWVyq92NNCKJeDy8XCB1yHCKpBd4evO2bkJNV9xcgHtLrVqozqxZAiCRKN1elWF
 1fyG8KNquqItYedUr+wZZacqW+uzpVr9pZmUqpVCk9s92fzTzDZcGAxnyqkaO2QTgdhPJT2m
 wpG2UwIKzzi13tmwakY7OAbXm76bGWVZCO3QTHVnNV8ku9wgeMc/ZGSLUT8hMDZlwEsW7u/D
 qt+NlTKiOIQsSW7u7h3SFm7sMQo03X/taK9PJhS2BhhgnXg8mOa6U+yNaJy+eU0Lf5hEUiDC
 vDOI5x++LD3pdrJVr/6ZB0Qg3/YzZ0dk+phQ+KlP6HyeO4LG662toMbFbeLcBjcC/ceEclII
 90QNEFSZKM6NVloM+NaZRYVO3ApxWkFu+1mrVTXOwU0EVDzhbQEQANzLiI6gHkIhBQKeQaYs
 p2SSqF9c++9LOy5x6nbQ4s0X3oTKaMGfBZuiKkkU6NnHCSa0Az5ScRWLaRGu1PzjgcVwzl5O
 sDawR1BtOG/XoPRNB2351PRp++W8TWo2viYYY0uJHKFHML+ku9q0P+NkdTzFGJLP+hn7x0RT
 DMbhKTHO3H2xJz5TXNE9zTJuIfGAz3ShDpijvzYieY330BzZYfpgvCllDVM5E4XgfF4F/N90
 wWKu50fMA01ufwu+99GEwTFVG2az5T9SXd7vfSgRSkzXy7hcnxj4IhOfM6Ts85/BjMeIpeqy
 TDdsuetBgX9DMMWxMWl7BLeiMzMGrfkJ4tvlof0sVjurXibTibZyfyGR2ricg8iTbHyFaAzX
 2uFVoZaPxrp7udDfQ96sfz0hesF9Zi8d7NnNnMYbUmUtaS083L/l2EDKvCIkhSjd48XF+aO8
 VhrCfbXWpGRaLcY/gxi2TXRYG9xCa7PINgz9SyO34sL6TeFPSZn4bPQV5O1j85Dj4jBecB1k
 z2arzwlWWKMZUbR04HTeAuuvYvCKEMnfW3ABzdonh70QdqJbpQGfAF2p4/iCETKWuqefiOYn
 pR8PqoQA1DYv3t7y9DIN5Jw/8Oj5wOeEybw6vTMB0rrnx+JaXvxeHSlFzHiD6il/ChDDkJ9J
 /ejCHUQIl40wLSDRABEBAAHCwXwEGAECAA8FAlQ84W0CGwwFCRLMAwAAIQkQvS1hSGYUO0wW
 IQQFLN57whUFO2ifG8q9LWFIZhQ7TA1WD/9yxJvQrpf6LcNrr8uMlQWCg2iz2q1LGt1Itkuu
 KaavEF9nqHmoqhSfZeAIKAPn6xuYbGxXDrpN7dXCOH92fscLodZqZtK5FtbLvO572EPfxneY
 UT7JzDc/5LT9cFFugTMOhq1BG62vUm/F6V91+unyp4dRlyryAeqEuISykhvjZCVHk/woaMZv
 c1Dm4Uvkv0Ilelt3Pb9J7zhcx6sm5T7v16VceF96jG61bnJ2GFS+QZerZp3PY27XgtPxRxYj
 AmFUeF486PHx/2Yi4u1rQpIpC5inPxIgR1+ZFvQrAV36SvLFfuMhyCAxV6WBlQc85ArOiQZB
 Wm7L0repwr7zEJFEkdy8C81WRhMdPvHkAIh3RoY1SGcdB7rB3wCzfYkAuCBqaF7Zgfw8xkad
 KEiQTexRbM1sc/I8ACpla3N26SfQwrfg6V7TIoweP0RwDrcf5PVvwSWsRQp2LxFCkwnCXOra
 gYmkrmv0duG1FStpY+IIQn1TOkuXrciTVfZY1cZD0aVxwlxXBnUNZZNslldvXFtndxR0SFat
 sflovhDxKyhFwXOP0Rv8H378/+14TaykknRBIKEc0+lcr+EMOSUR5eg4aURb8Gc3Uc7fgQ6q
 UssTXzHPyj1hAyDpfu8DzAwlh4kKFTodxSsKAjI45SLjadSc94/5Gy8645Y1KgBzBPTH7Q==
In-Reply-To: <1697794232-2607-10-git-send-email-shengjiu.wang@nxp.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 20/10/2023 11:30, Shengjiu Wang wrote:
> The Audio M2M class includes controls for audio memory-to-memory
> use cases. The controls can be used for audio codecs, audio
> preprocessing, audio postprocessing.
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> ---
>  .../userspace-api/media/v4l/common.rst        |  1 +
>  .../media/v4l/ext-ctrls-audio-m2m.rst         | 21 +++++++++++++++++++
>  .../media/v4l/vidioc-g-ext-ctrls.rst          |  4 ++++
>  drivers/media/v4l2-core/v4l2-ctrls-defs.c     |  4 ++++
>  include/uapi/linux/v4l2-controls.h            |  4 ++++
>  5 files changed, 34 insertions(+)
>  create mode 100644 Documentation/userspace-api/media/v4l/ext-ctrls-audio-m2m.rst
> 
> diff --git a/Documentation/userspace-api/media/v4l/common.rst b/Documentation/userspace-api/media/v4l/common.rst
> index ea0435182e44..d5366e96a596 100644
> --- a/Documentation/userspace-api/media/v4l/common.rst
> +++ b/Documentation/userspace-api/media/v4l/common.rst
> @@ -52,6 +52,7 @@ applicable to all devices.
>      ext-ctrls-fm-rx
>      ext-ctrls-detect
>      ext-ctrls-colorimetry
> +    ext-ctrls-audio-m2m
>      fourcc
>      format
>      planar-apis
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-audio-m2m.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-audio-m2m.rst
> new file mode 100644
> index 000000000000..82d2ecedbfee
> --- /dev/null
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-audio-m2m.rst
> @@ -0,0 +1,21 @@
> +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
> +
> +.. _audiom2m-controls:
> +
> +***************************
> +Audio M2M Control Reference
> +***************************
> +
> +The Audio M2M class includes controls for audio memory-to-memory
> +use cases. The controls can be used for audio codecs, audio
> +preprocessing, audio postprocessing.
> +
> +Audio M2M Control IDs
> +-----------------------
> +
> +.. _audiom2m-control-id:
> +
> +``V4L2_CID_M2M_AUDIO_CLASS (class)``
> +    The Audio M2M class descriptor. Calling
> +    :ref:`VIDIOC_QUERYCTRL` for this control will
> +    return a description of this control class.
> diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
> index f9f73530a6be..e8475f9fd2cf 100644
> --- a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
> +++ b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
> @@ -480,6 +480,10 @@ still cause this situation.
>        - 0xa50000
>        - The class containing colorimetry controls. These controls are
>  	described in :ref:`colorimetry-controls`.
> +    * - ``V4L2_CTRL_CLASS_M2M_AUDIO``
> +      - 0xa60000
> +      - The class containing audio m2m controls. These controls are
> +	described in :ref:`audiom2m-controls`.
>  
>  Return Value
>  ============
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls-defs.c b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> index 8696eb1cdd61..2a85ea3dc92f 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> @@ -1242,6 +1242,9 @@ const char *v4l2_ctrl_get_name(u32 id)
>  	case V4L2_CID_COLORIMETRY_CLASS:	return "Colorimetry Controls";
>  	case V4L2_CID_COLORIMETRY_HDR10_CLL_INFO:		return "HDR10 Content Light Info";
>  	case V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY:	return "HDR10 Mastering Display";
> +
> +	/* Audio M2M controls */
> +	case V4L2_CID_M2M_AUDIO_CLASS:  return "Audio M2M Controls";
>  	default:
>  		return NULL;
>  	}
> @@ -1451,6 +1454,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  	case V4L2_CID_DETECT_CLASS:
>  	case V4L2_CID_CODEC_STATELESS_CLASS:
>  	case V4L2_CID_COLORIMETRY_CLASS:
> +	case V4L2_CID_M2M_AUDIO_CLASS:
>  		*type = V4L2_CTRL_TYPE_CTRL_CLASS;
>  		/* You can neither read nor write these */
>  		*flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index 68db66d4aae8..eb0f0a76f867 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -30,6 +30,7 @@
>  #define V4L2_CTRL_CLASS_DETECT		0x00a30000	/* Detection controls */
>  #define V4L2_CTRL_CLASS_CODEC_STATELESS 0x00a40000	/* Stateless codecs controls */
>  #define V4L2_CTRL_CLASS_COLORIMETRY	0x00a50000	/* Colorimetry controls */
> +#define V4L2_CTRL_CLASS_M2M_AUDIO	0x00a60000	/* Audio M2M controls */
>  
>  /* User-class control IDs */
>  
> @@ -3494,4 +3495,7 @@ struct v4l2_ctrl_av1_film_grain {
>  #define V4L2_CID_MPEG_MFC51_BASE        V4L2_CID_CODEC_MFC51_BASE
>  #endif
>  
> +#define V4L2_CID_M2M_AUDIO_CLASS_BASE  (V4L2_CTRL_CLASS_M2M_AUDIO | 0x900)
> +#define V4L2_CID_M2M_AUDIO_CLASS       (V4L2_CTRL_CLASS_M2M_AUDIO | 1)
> +

This should be moved up to before the #ifndef __KERNEL__. Those backwards compatibility
defines have to remain at the end of the header.

Regards,

	Hans

>  #endif