ipa: rkisp1: Add support of Filter control

Denoise and Sharpness filters will be applied by RkISP1 during the
demosaicing step. The denoise filter is responsible for removing noise
from the image, while the sharpness filter will enhance its acutance.

Add filter algorithm with denoise and sharpness values 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 +136,20 @@ namespace libcamera::ipa::rkisp1 {
  * \brief Estimated color temperature
  */
 
+/**
+ * \var IPAFrameContext::filter
+ * \brief Context for the Filter algorithm
+ *
+ * \struct IPAFrameContext::filter.denoise
+ * \brief Denoising level
+ *
+ * \var IPAFrameContext::filter.sharpness
+ * \brief Sharpness level
+ *
+ * \var IPAFrameContext::filter.updateParams
+ * \brief Indicates if ISP parameters need to be updated
+ */
+
 /**
  * \var IPAFrameContext::sensor
  * \brief Effective sensor values