diff --git a/Documentation/admin-guide/media/mgb4.rst b/Documentation/admin-guide/media/mgb4.rst
index 2977f74d7e26..6fff886003e2 100644
--- a/Documentation/admin-guide/media/mgb4.rst
+++ b/Documentation/admin-guide/media/mgb4.rst
@@ -228,8 +228,12 @@ Common FPDL3/GMSL output parameters
open.*
**frame_rate** (RW):
- Output video frame rate in frames per second. The default frame rate is
- 60Hz.
+ Output video signal frame rate limit in frames per second. Due to
+ the limited output pixel clock steps, the card can not always generate
+ a frame rate perfectly matching the value required by the connected display.
+ Using this parameter one can limit the frame rate by "crippling" the signal
+ so that the lines are not equal but the signal appears like having the exact
+ frame rate to the connected display. The default frame rate limit is 60Hz.
It's not clear what is meant with 'crippling'. Normally when dealing with video
framerates the driver will pick the closest video timing to the requested framerate.
It is understood that you can't always get the exact framerate, so drivers can
make adjustments.