Programming Interface; Ioctls/Functions - Freescale Semiconductor i.MX 6Solo Reference Manual

• CONFIG_MXC_EINK_PANEL includes support for the Electrophoretic Display
Controller. In menuconfig, this option is available under:
• Device Drivers > Graphics Support > E-Ink Panel Framebuffer
• CONFIG_MXC_EINK_AUTO_UPDATE_MODE enables support for auto-update
mode, which provides automated EPD updates through the deferred I/O framebuffer
driver. This option is dependent on the MXC_EINK_PANEL option. In menuconfig,
this option is available under:
• Device Drivers > Graphics Support > E-Ink Auto-update Mode Support
• CONFIG_FB to include frame buffer support in the Linux kernel. In menuconfig,
this option is available under:
• Device Drivers > Graphics support > Support for frame buffer devices
• By default, this option is Y for all architectures.
• CONFIG_FB_MXC is a configuration option for the MXC Frame buffer driver. This
option is dependent on the CONFIG_FB option. In menuconfig, this option is
available under:
• Device Drivers > Graphics support > MXC Framebuffer support
• By default, this option is Y for all architectures.
• CONFIG_MXC_PXP enables support for the PxP. The PxP is required by the EPDC
driver for processing (color space conversion, rotation, auto-waveform selection)
framebuffer update regions. This option must be selected for the EPDC framebuffer
driver to operate correctly. In menuconfig, this option is available under:
• Device Drivers > DMA Engine support > MXC PxP support

9.6 Programming Interface

9.6.1 IOCTLs/Functions

The EPDC Frame Buffer is accessible from user space and from kernel space. A single
set of functions describes the EPDC Frame Buffer driver extension. There are, however,
two modes for accessing these functions. For user space access the IOCTL interface
should be used. For kernel space access the functions should be called directly. For each
function below both the IOCTL code and the corresponding kernel function is listed.
MXCFB_SET_WAVEFORM_MODES / mxc_epdc_fb_set_waveform_modes()
i.MX 6Solo/6DualLite Linux Reference Manual, Rev. L3.0.35_4.1.0, 09/2013
Freescale Semiconductor, Inc.
Chapter 9 Electrophoretic Display Controller (EPDC) Frame Buffer Driver
This option only enables the use of auto-update mode.
Turning on auto-update mode requires an additional
IOCTL call using the
MXCFB_SET_AUTO_UPDATE_MODE IOCTL.
NOTE
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