[PATCH v2] media: add support for decoder as one of media entity types

[PATCH v2] media: add support for decoder as one of media entity types

[Prabhakar Lad]

From: Manjunath Hadli <manjunath.hadli@ti.com>

A lot of SOCs including Texas Instruments Davinci family mainly use
video decoders as input devices. This patch adds a flag
'MEDIA_ENT_T_V4L2_SUBDEV_DECODER' media entity type for decoder's.
Along side updates the documentation for this media entity type.

Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Cc: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Cc: Rob Landley <rob@landley.net>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
---
 Changes for v2:
 1: Sending as a separate patch. 
 2: Added documentation for the added media entity type.
 3: Improved the commit message.
 
 .../DocBook/media/v4l/media-ioc-enum-entities.xml  |   10 ++++++++++
 include/uapi/linux/media.h                         |    2 ++
 2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/Documentation/DocBook/media/v4l/media-ioc-enum-entities.xml b/Documentation/DocBook/media/v4l/media-ioc-enum-entities.xml
index 576b68b..116c301 100644
--- a/Documentation/DocBook/media/v4l/media-ioc-enum-entities.xml
+++ b/Documentation/DocBook/media/v4l/media-ioc-enum-entities.xml
@@ -272,6 +272,16 @@
 	    <entry><constant>MEDIA_ENT_T_V4L2_SUBDEV_LENS</constant></entry>
 	    <entry>Lens controller</entry>
 	  </row>
+	  <row>
+	    <entry><constant>MEDIA_ENT_T_V4L2_SUBDEV_DECODER</constant></entry>
+	    <entry>Video decoder, the basic function of the video decoder is to
+	    accept analogue video from a wide variety of sources such as
+	    broadcast, DVD players, cameras and video cassette recorders, in
+	    either NTSC, PAL or HD format and still occasionally SECAM, separate
+	    it into its component parts, luminance and chrominance, and output
+	    it in some digital video standard, with appropriate embedded timing
+	    signals.</entry>
+	  </row>
 	</tbody>
       </tgroup>
     </table>
diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
index 0ef8833..dac06d7 100644
--- a/include/uapi/linux/media.h
+++ b/include/uapi/linux/media.h
@@ -56,6 +56,8 @@ struct media_device_info {
 #define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR	(MEDIA_ENT_T_V4L2_SUBDEV + 1)
 #define MEDIA_ENT_T_V4L2_SUBDEV_FLASH	(MEDIA_ENT_T_V4L2_SUBDEV + 2)
 #define MEDIA_ENT_T_V4L2_SUBDEV_LENS	(MEDIA_ENT_T_V4L2_SUBDEV + 3)
+/* DECODER: Converts analogue video to digital */
+#define MEDIA_ENT_T_V4L2_SUBDEV_DECODER	(MEDIA_ENT_T_V4L2_SUBDEV + 4)
 
 #define MEDIA_ENT_FL_DEFAULT		(1 << 0)
 
-- 
1.7.4.1

Re: [PATCH v2] media: add support for decoder as one of media entity types

[Sylwester Nawrocki]

Hi Prabhakar,

On 01/28/2013 12:50 PM, Prabhakar Lad wrote:
> diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
> index 0ef8833..dac06d7 100644
> --- a/include/uapi/linux/media.h
> +++ b/include/uapi/linux/media.h
> @@ -56,6 +56,8 @@ struct media_device_info {
>  #define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR	(MEDIA_ENT_T_V4L2_SUBDEV + 1)
>  #define MEDIA_ENT_T_V4L2_SUBDEV_FLASH	(MEDIA_ENT_T_V4L2_SUBDEV + 2)
>  #define MEDIA_ENT_T_V4L2_SUBDEV_LENS	(MEDIA_ENT_T_V4L2_SUBDEV + 3)
> +/* DECODER: Converts analogue video to digital */

The patch looks good to me, I would just change this comment to
something like:

/* A converter of analogue video to its digital representation. */

But that's really a nitpicking.

> +#define MEDIA_ENT_T_V4L2_SUBDEV_DECODER	(MEDIA_ENT_T_V4L2_SUBDEV + 4)
>  
>  #define MEDIA_ENT_FL_DEFAULT		(1 << 0)

Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

--

Thanks,
Sylwester

Re: [PATCH v2] media: add support for decoder as one of media entity types

[Prabhakar Lad]

Hi Sylwester,

On Thu, Feb 7, 2013 at 5:18 PM, Sylwester Nawrocki
<s.nawrocki@samsung.com> wrote:
> Hi Prabhakar,
>
> On 01/28/2013 12:50 PM, Prabhakar Lad wrote:
>> diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
>> index 0ef8833..dac06d7 100644
>> --- a/include/uapi/linux/media.h
>> +++ b/include/uapi/linux/media.h
>> @@ -56,6 +56,8 @@ struct media_device_info {
>>  #define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR       (MEDIA_ENT_T_V4L2_SUBDEV + 1)
>>  #define MEDIA_ENT_T_V4L2_SUBDEV_FLASH        (MEDIA_ENT_T_V4L2_SUBDEV + 2)
>>  #define MEDIA_ENT_T_V4L2_SUBDEV_LENS (MEDIA_ENT_T_V4L2_SUBDEV + 3)
>> +/* DECODER: Converts analogue video to digital */
>
> The patch looks good to me, I would just change this comment to
> something like:
>
> /* A converter of analogue video to its digital representation. */
>
> But that's really a nitpicking.
>
OK will fix it and post a v3.

Regards,
--Prabhakar

>> +#define MEDIA_ENT_T_V4L2_SUBDEV_DECODER      (MEDIA_ENT_T_V4L2_SUBDEV + 4)
>>
>>  #define MEDIA_ENT_FL_DEFAULT         (1 << 0)
>
> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
>
> --
>
> Thanks,
> Sylwester