A display panel, a display device and a method of controlling a display panel are provided. The display panel includes a base substrate, a plurality of sub-pixels, a plurality of gate lines each gate line being connected to at least one row of sub-pixels, a plurality of shift registers, and a plurality of auxiliary circuits located in a peripheral region of the base substrate. The gate line has a first end connected to the shift register and a second end connected to the auxiliary circuit. The auxiliary circuit has a control terminal configured to receive an auxiliary signal, an input terminal configured to receive a reference signal, and an output terminal connected to the second end of the gate line, and is configured to provide the reference signal at the input terminal to the output terminal under control of the auxiliary signal at the control terminal.