Ioctls/Functions - Freescale Semiconductor i.MX 6SoloLite Linux Reference Manual

Programming Interface

5.6.1 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()
Description:
Defines a mapping for common waveform modes.
Parameters:
mxcfb_waveform_modes *modes
Pointer to a structure containing the waveform mode values for common waveform
modes. These values must be configured in order for automatic waveform mode selection
to function properly.
MXCFB_SET_TEMPERATURE / mxc_epdc_fb_set_temperature
Description:
Set the temperature to be used by the EPDC driver in subsequent panel updates.
Parameters:
int32_t temperature
Temperature value, in degrees Celsius. Note that this temperature setting may be
overridden by setting the temperature value parameter to anything other than
TEMP_USE_AMBIENT when using the MXCFB_SEND_UPDATE ioctl.
MXCFB_SET_AUTO_UPDATE_MODE / mxc_epdc_fb_set_auto_update
Description:
Select between automatic and region update mode.
Parameters:
__u32 mode
In region update mode, updates must be submitted via the MXCFB_SEND_UPDATE
IOCTL.
i.MX 6SoloLite Linux Reference Manual, Rev. L3.0.35_4.1.0, 09/2013
52 Freescale Semiconductor, Inc.