Electronic paper displays are commonly used in e-readers and low-power display devices because they consume little power and offer high contrast. However, most existing solutions rely on user space control, lack open source drivers, and do not provide adequate integration or flexibility. To address these issues, I developed an open source Direct Rendering Manager (DRM) driver for small-size e-paper displays. This driver moves the control logic into the Linux kernel, supports the standard DRM framework, and communicates via the SPI interface. It is implemented on the Renesas RZ/V2H platform (development board: Kakip), offering strong integration for embedded use cases. My goal is to upstream this driver to the mainline as a reference implementation to help future developers integrate e-paper technology into the Linux display architecture.