Lines Matching +full:signal +full:- +full:to +full:- +full:noise

1 .. SPDX-License-Identifier: GPL-2.0
13 ---------
18 - V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR
20 The user application can subscribe to this event from the ipuX_csiY
30 -----------------------------------
33 NTSC/PAL signal re-sync (too little or too many video lines). When
34 this happens, the IPU triggers a mechanism to re-establish vertical
36 from image to image, and can last a long time before a stable image is
48 time every frame, not a fixed value), we can use it to detect the
54 to correct the rolling/split image.
56 The ipuX_csiY subdev includes custom controls to tweak some dials for
60 - V4L2_CID_IMX_FIM_ENABLE
64 - V4L2_CID_IMX_FIM_NUM
66 How many frame interval measurements to average before comparing against
67 the nominal frame interval reported by the sensor. This can reduce noise
70 - V4L2_CID_IMX_FIM_TOLERANCE_MIN
75 - V4L2_CID_IMX_FIM_TOLERANCE_MAX
78 discarded and do not enter into the average. This can be used to
79 discard really high interval errors that might be due to interrupt
82 - V4L2_CID_IMX_FIM_NUM_SKIP
84 How many frames to skip after a FIM reset or stream restart before
85 FIM begins to average intervals.
87 - V4L2_CID_IMX_FIM_ICAP_CHANNEL / V4L2_CID_IMX_FIM_ICAP_EDGE
90 for measuring frame intervals. This is superior to the default method
92 to uncertainty errors introduced by interrupt latency.
94 Input capture requires hardware support. A VSYNC signal must be routed
95 to one of the i.MX6 input capture channel pads.
98 channel to use. This must be 0 or 1.
100 V4L2_CID_IMX_FIM_ICAP_EDGE configures which signal edge will trigger
102 with a value of IRQ_TYPE_NONE. Set this control to IRQ_TYPE_EDGE_RISING,
103 IRQ_TYPE_EDGE_FALLING, or IRQ_TYPE_EDGE_BOTH to enable input capture,
104 triggered on the given signal edge(s).
111 ---------
115 include/linux/imx-media.h
119 -------
121 - Steve Longerbeam <steve_longerbeam@mentor.com>
122 - Philipp Zabel <kernel@pengutronix.de>
123 - Russell King <linux@armlinux.org.uk>
125 Copyright (C) 2012-2017 Mentor Graphics Inc.