.. SPDX-License-Identifier: GPL-2.0
-====================
-mgb4 sysfs interface
-====================
+The mgb4 driver
+===============
+
+sysfs interface
+---------------
The mgb4 driver provides a sysfs interface, that is used to configure video
stream related parameters (some of them must be set properly before the v4l2
``/sys/class/video4linux/videoX/device`` and module specific found under
``/sys/class/video4linux/videoX``.
-
Global (PCI card) parameters
-============================
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
**module_type** (R):
Module type.
where each component is a 8b number.
-
Common FPDL3/GMSL input parameters
-==================================
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
**input_id** (R):
Input number ID, zero based.
*Note: This parameter can not be changed while the input v4l2 device is
open.*
-
Common FPDL3/GMSL output parameters
-===================================
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
**output_id** (R):
Output number ID, zero based.
Number of video lines between the end of the last valid pixel line (marked
by DE=1) and assertion of the VSYNC signal. The default value is 2.
-
FPDL3 specific input parameters
-===============================
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
**fpdl3_input_width** (RW):
Number of deserializer input lines.
| 2 - dual
FPDL3 specific output parameters
-================================
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
**fpdl3_output_width** (RW):
Number of serializer output lines.
| 2 - dual
GMSL specific input parameters
-==============================
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
**gmsl_mode** (RW):
GMSL speed mode.
| 0 - disabled
| 1 - enabled (default)
-
-====================
-mgb4 mtd partitions
-====================
+MTD partitions
+--------------
The mgb4 driver creates a MTD device with two partitions:
- mgb4-fw.X - FPGA firmware.
partition represents the whole, unpartitioned, card's FLASH memory and one should
not fiddle with it...
-====================
-mgb4 iio (triggers)
-====================
+IIO (triggers)
+--------------
The mgb4 driver creates an Industrial I/O (IIO) device that provides trigger and
signal level status capability. The following scan elements are available: