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[media] DocBook/media: clarify control documentation

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- Add missing V4L2_CTRL_TYPE_U32 documentation
- Remove 'which are actually different on the hardware' sentence which
  is confusing. I think the idea was to let the user know that the step can
  be different for different hardware, but that's obvious because otherwise
  you wouldn't need to specify the step value.
- Clarify that V4L2_CTRL_COMPOUND_TYPES also applies to arrays.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2015-09-21 06:21:55 -03:00 committed by Mauro Carvalho Chehab
parent 35204e2e84
commit 60f4570de8
2 changed files with 23 additions and 5 deletions
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7
Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
View File

@ -197,6 +197,13 @@ Valid if this control is of type <constant>V4L2_CTRL_TYPE_U8</constant>.</entry>
<entry><structfield>p_u16</structfield></entry>
<entry>A pointer to a matrix control of unsigned 16-bit values.
Valid if this control is of type <constant>V4L2_CTRL_TYPE_U16</constant>.</entry>
</row>
<row>
<entry></entry>
<entry>__u32 *</entry>
<entry><structfield>p_u32</structfield></entry>
<entry>A pointer to a matrix control of unsigned 32-bit values.
Valid if this control is of type <constant>V4L2_CTRL_TYPE_U32</constant>.</entry>
</row>
<row>
<entry></entry>

21
Documentation/DocBook/media/v4l/vidioc-queryctrl.xml
View File

@ -101,8 +101,9 @@ prematurely end the enumeration).</para></footnote></para>
next supported non-compound control, or <errorcode>EINVAL</errorcode>
if there is none. In addition, the <constant>V4L2_CTRL_FLAG_NEXT_COMPOUND</constant>
flag can be specified to enumerate all compound controls (i.e. controls
with type &ge; <constant>V4L2_CTRL_COMPOUND_TYPES</constant>). Specify both
<constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant> and
with type &ge; <constant>V4L2_CTRL_COMPOUND_TYPES</constant> and/or array
control, in other words controls that contain more than one value).
Specify both <constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant> and
<constant>V4L2_CTRL_FLAG_NEXT_COMPOUND</constant> in order to enumerate
all controls, compound or not. Drivers which do not support these flags yet
always return <errorcode>EINVAL</errorcode>.</para>
@ -422,7 +423,7 @@ the array to zero.</entry>
<entry>any</entry>
<entry>An integer-valued control ranging from minimum to
maximum inclusive. The step value indicates the increment between
values which are actually different on the hardware.</entry>
values.</entry>
</row>
<row>
<entry><constant>V4L2_CTRL_TYPE_BOOLEAN</constant></entry>
@ -518,7 +519,7 @@ Older drivers which do not support this feature return an
<entry>any</entry>
<entry>An unsigned 8-bit valued control ranging from minimum to
maximum inclusive. The step value indicates the increment between
values which are actually different on the hardware.
values.
</entry>
</row>
<row>
@ -528,7 +529,17 @@ values which are actually different on the hardware.
<entry>any</entry>
<entry>An unsigned 16-bit valued control ranging from minimum to
maximum inclusive. The step value indicates the increment between
values which are actually different on the hardware.
values.
</entry>
</row>
<row>
<entry><constant>V4L2_CTRL_TYPE_U32</constant></entry>
<entry>any</entry>
<entry>any</entry>
<entry>any</entry>
<entry>An unsigned 32-bit valued control ranging from minimum to
maximum inclusive. The step value indicates the increment between
values.
</entry>
</row>
</tbody>