linux-kernel - Re: [PATCH 02/31] media: Add ALSA Media Controller function entities

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Date:	Thu, 28 Jan 2016 13:02:32 -0200
From:	Mauro Carvalho Chehab <mchehab@....samsung.com>
To:	Shuah Khan <shuahkh@....samsung.com>
Cc:	tiwai@...e.com, clemens@...isch.de, hans.verkuil@...co.com,
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	alsa-devel@...a-project.org
Subject: Re: [PATCH 02/31] media: Add ALSA Media Controller function
 entities

Em Wed,  6 Jan 2016 13:26:51 -0700
Shuah Khan <shuahkh@....samsung.com> escreveu:

> Add ALSA Media Controller capture, playback, and mixer
> function entity defines.
> 
> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
> ---
>  include/uapi/linux/media.h | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
> index 75cbe92..53a96ae 100644
> --- a/include/uapi/linux/media.h
> +++ b/include/uapi/linux/media.h
> @@ -89,6 +89,13 @@ struct media_device_info {
>  #define MEDIA_ENT_F_IO_SWRADIO		(MEDIA_ENT_F_BASE + 33)
>  
>  /*
> + * ALSA entities MEDIA_ENT_F_AUDIO_IO is for Capture and Playback
> +*/
> +#define MEDIA_ENT_F_AUDIO_CAPTURE	(MEDIA_ENT_F_BASE + 200)
> +#define MEDIA_ENT_F_AUDIO_PLAYBACK	(MEDIA_ENT_F_BASE + 201)
> +#define MEDIA_ENT_F_AUDIO_MIXER		(MEDIA_ENT_F_BASE + 202)

Please document at KernelDoc.

> +
> +/*
>   * Don't touch on those. The ranges MEDIA_ENT_F_OLD_BASE and
>   * MEDIA_ENT_F_OLD_SUBDEV_BASE are kept to keep backward compatibility
>   * with the legacy v1 API.The number range is out of range by purpose:
> @@ -130,7 +137,7 @@ struct media_device_info {
>  #define MEDIA_ENT_T_DEVNODE		MEDIA_ENT_F_OLD_BASE
>  #define MEDIA_ENT_T_DEVNODE_V4L		MEDIA_ENT_F_IO_V4L
>  #define MEDIA_ENT_T_DEVNODE_FB		(MEDIA_ENT_T_DEVNODE + 2)
> -#define MEDIA_ENT_T_DEVNODE_ALSA	(MEDIA_ENT_T_DEVNODE + 3)
> +#define MEDIA_ENT_T_DEVNODE_ALSA	MEDIA_ENT_F_AUDIO_IO

Please preserve the old number here, as we don't want to break kABI.

>  #define MEDIA_ENT_T_DEVNODE_DVB		(MEDIA_ENT_T_DEVNODE + 4)
>  
>  #define MEDIA_ENT_T_UNKNOWN		MEDIA_ENT_F_UNKNOWN