[PATCH v3 3/5] media: vsp1: Document partition algorithm in code header

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The image partition algorithm operates on the image dimensions as input
into the WPF entity. Document this in the code block header.

Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
---
 drivers/media/platform/vsp1/vsp1_video.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/media/platform/vsp1/vsp1_video.c b/drivers/media/platform/vsp1/vsp1_video.c
index 563f9a02c373..d1ecc3d91290 100644
--- a/drivers/media/platform/vsp1/vsp1_video.c
+++ b/drivers/media/platform/vsp1/vsp1_video.c
@@ -173,6 +173,14 @@ static int __vsp1_video_try_format(struct vsp1_video *video,
 
 /* -----------------------------------------------------------------------------
  * VSP1 Partition Algorithm support
+ *
+ * VSP hardware can have restrictions on image width dependent on the hardware
+ * configuration of the pipeline. Adapting for these restrictions is implemented
+ * via the partition algorithm.
+ *
+ * The partition windows and sizes are based on the output size of the WPF
+ * before rotation, which is represented by the input parameters to the WPF
+ * entity in our pipeline.
  */
 
 /**
-- 
2.19.1




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