linux-kernel - Re: [PATCH 01/31] uapi/media.h: Declare interface types for ALSA

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Date:	Mon, 01 Feb 2016 17:18:08 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	"Shuah Khan" <shuahkh@....samsung.com>
Cc:	"Mauro Carvalho Chehab" <mchehab@....samsung.com>,
	<alsa-devel@...a-project.org>, <arnd@...db.de>,
	<ricard.wanderlof@...s.com>, <hans.verkuil@...co.com>,
	<labbott@...oraproject.org>, <chehabrafael@...il.com>,
	<misterpib@...il.com>, <prabhakar.csengg@...il.com>,
	<ricardo.ribalda@...il.com>, <ruchandani.tina@...il.com>,
	<takamichiho@...il.com>, <tvboxspy@...il.com>,
	<dominic.sacre@....de>, <laurent.pinchart@...asonboard.com>,
	<crope@....fi>, <julian@...st.de>, <clemens@...isch.de>,
	<pierre-louis.bossart@...ux.intel.com>,
	<sakari.ailus@...ux.intel.com>, <corbet@....net>,
	<joe@...po.co.uk>, <johan@...ud.se>, <dan.carpenter@...cle.com>,
	<pawel@...iak.com>, <javier@....samsung.com>,
	<p.zabel@...gutronix.de>, <perex@...ex.cz>,
	<stefanr@...6.in-berlin.de>, <inki.dae@...sung.com>,
	<jh1009.sung@...sung.com>, <k.kozlowski@...sung.com>,
	<kyungmin.park@...sung.com>, <m.szyprowski@...sung.com>,
	<sw0312.kim@...sung.com>, <elfring@...rs.sourceforge.net>,
	<linux-api@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-media@...r.kernel.org>, <linuxbugs@...tgam.net>,
	<gtmkramer@...all.nl>, <normalperson@...t.net>, <daniel@...que.org>
Subject: Re: [PATCH 01/31] uapi/media.h: Declare interface types for ALSA

On Mon, 01 Feb 2016 17:07:51 +0100,
Shuah Khan wrote:
> 
> On 01/28/2016 07:59 AM, Mauro Carvalho Chehab wrote:
> > Em Wed,  6 Jan 2016 13:26:50 -0700
> > Shuah Khan <shuahkh@....samsung.com> escreveu:
> > 
> >> From: Mauro Carvalho Chehab <mchehab@....samsung.com>
> >>
> >> Declare the interface types to be used on alsa for the new
> >> G_TOPOLOGY ioctl.
> >>
> >> Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
> >> ---
> >>  drivers/media/media-entity.c | 12 ++++++++++++
> >>  include/uapi/linux/media.h   |  8 ++++++++
> >>  2 files changed, 20 insertions(+)
> >>
> >> diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
> >> index eb38bc3..6e02d19 100644
> >> --- a/drivers/media/media-entity.c
> >> +++ b/drivers/media/media-entity.c
> >> @@ -65,6 +65,18 @@ static inline const char *intf_type(struct media_interface *intf)
> >>  		return "v4l2-subdev";
> >>  	case MEDIA_INTF_T_V4L_SWRADIO:
> >>  		return "swradio";
> >> +	case MEDIA_INTF_T_ALSA_PCM_CAPTURE:
> >> +		return "pcm-capture";
> >> +	case MEDIA_INTF_T_ALSA_PCM_PLAYBACK:
> >> +		return "pcm-playback";
> >> +	case MEDIA_INTF_T_ALSA_CONTROL:
> >> +		return "alsa-control";
> >> +	case MEDIA_INTF_T_ALSA_COMPRESS:
> >> +		return "compress";
> >> +	case MEDIA_INTF_T_ALSA_RAWMIDI:
> >> +		return "rawmidi";
> >> +	case MEDIA_INTF_T_ALSA_HWDEP:
> >> +		return "hwdep";
> >>  	default:
> >>  		return "unknown-intf";
> >>  	}
> >> diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
> >> index cacfceb..75cbe92 100644
> >> --- a/include/uapi/linux/media.h
> >> +++ b/include/uapi/linux/media.h
> >> @@ -252,6 +252,7 @@ struct media_links_enum {
> >>  
> >>  #define MEDIA_INTF_T_DVB_BASE	0x00000100
> >>  #define MEDIA_INTF_T_V4L_BASE	0x00000200
> >> +#define MEDIA_INTF_T_ALSA_BASE	0x00000300
> >>  
> >>  /* Interface types */
> >>  
> >> @@ -267,6 +268,13 @@ struct media_links_enum {
> >>  #define MEDIA_INTF_T_V4L_SUBDEV (MEDIA_INTF_T_V4L_BASE + 3)
> >>  #define MEDIA_INTF_T_V4L_SWRADIO (MEDIA_INTF_T_V4L_BASE + 4)
> >>  
> >> +#define MEDIA_INTF_T_ALSA_PCM_CAPTURE   (MEDIA_INTF_T_ALSA_BASE)
> >> +#define MEDIA_INTF_T_ALSA_PCM_PLAYBACK  (MEDIA_INTF_T_ALSA_BASE + 1)
> >> +#define MEDIA_INTF_T_ALSA_CONTROL       (MEDIA_INTF_T_ALSA_BASE + 2)
> >> +#define MEDIA_INTF_T_ALSA_COMPRESS      (MEDIA_INTF_T_ALSA_BASE + 3)
> >> +#define MEDIA_INTF_T_ALSA_RAWMIDI       (MEDIA_INTF_T_ALSA_BASE + 4)
> >> +#define MEDIA_INTF_T_ALSA_HWDEP         (MEDIA_INTF_T_ALSA_BASE + 5)
> > 
> > Patch looks ok, but please document the new media interfaces at KernelDoc
> > documentation.
> > 
> 
> Hi Takashi,
> 
> If you are okay with these changes, could you please
> Ack this patch. I am addressing documentation comment
> from Mauro.

Well, the available ALSA devices are:

CONTROL
SEQUENCER
TIMER
COMPRESS
HWDEP
RAWMIDI
PCM_PLAYBACK
PCM_CAPTURE

as found in sound/minors.h.

Any reason not to define for some of them?


Takashi