Re: [PATCH v3 1/3] v4l: Add test pattern colour component controls

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Hi Laurent,

Thanks for your comments.

Laurent Pinchart wrote:
Hi Sakari,

Thank you for the patch.

On Thursday 29 May 2014 17:40:46 Sakari Ailus wrote:
In many cases the test pattern has selectable values for each colour
component. Implement controls for raw bayer components. Additional controls
should be defined for colour components that are not covered by these
controls.

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
  Documentation/DocBook/media/v4l/controls.xml | 34 +++++++++++++++++++++++++
  drivers/media/v4l2-core/v4l2-ctrls.c         |  4 ++++
  include/uapi/linux/v4l2-controls.h           |  4 ++++
  3 files changed, 42 insertions(+)

diff --git a/Documentation/DocBook/media/v4l/controls.xml
b/Documentation/DocBook/media/v4l/controls.xml index 47198ee..bf23994
100644
--- a/Documentation/DocBook/media/v4l/controls.xml
+++ b/Documentation/DocBook/media/v4l/controls.xml
@@ -4677,6 +4677,40 @@ interface and may change in the future.</para>
  	    conversion.
  	    </entry>
  	  </row>
+	  <row>
+	    <entry
spanname="id"><constant>V4L2_CID_TEST_PATTERN_RED</constant></entry> +	
<entry>integer</entry>
+	  </row>
+	  <row>
+	    <entry spanname="descr">Test pattern red colour component.
+	    </entry>
+	  </row>
+	  <row>
+	    <entry
spanname="id"><constant>V4L2_CID_TEST_PATTERN_GREENR</constant></entry>
+	    <entry>integer</entry>
+	  </row>
+	  <row>
+	    <entry spanname="descr">Test pattern green (next to red)
+	    colour component.

What about non-Bayer RGB sensors ? Should they use the GREENR or the GREENB
control for the green component ? Or a different control ?

A different one. It should be simply green. I could add it to the same patch if you wish.

I'm wondering whether we shouldn't have a single test pattern color control
and create a color type using Hans' complex controls API.

A raw bayer four-pixel value, you mean?

--
Regards,

Sakari Ailus
sakari.ailus@xxxxxxxxxxxxxxx
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