ipa: rkisp1: Add support of ColorProcessing control

Add ColorProcessing algorithm that is in charge to manage brightness,
contrast and saturation controls.  These controls are currently based on
user controls.

Signed-off-by: Florian Sylvestre <fsylvestre@baylibre.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/ipa/rkisp1/ipa_context.cpp

@@ -136,6 +136,23 @@ namespace libcamera::ipa::rkisp1 {
  * \brief Estimated color temperature
  */
 
+/**
+ * \var IPAFrameContext::cproc
+ * \brief Context for the Color Processing algorithm
+ *
+ * \struct IPAFrameContext::cproc.brightness
+ * \brief Brightness level
+ *
+ * \var IPAFrameContext::cproc.contrast
+ * \brief Contrast level
+ *
+ * \var IPAFrameContext::cproc.saturation
+ * \brief Saturation level
+ *
+ * \var IPAFrameContext::cproc.updateParams
+ * \brief Indicates if ISP parameters need to be updated
+ */
+
 /**
  * \var IPAFrameContext::filter
  * \brief Context for the Filter algorithm