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68 lines
2.6 KiB
C
68 lines
2.6 KiB
C
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/*
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* v4l2-dv-timings - Internal header with dv-timings helper functions
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*
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* Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#ifndef __V4L2_DV_TIMINGS_H
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#define __V4L2_DV_TIMINGS_H
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#include <linux/videodev2.h>
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/** v4l2_dv_valid_timings() - are these timings valid?
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* @t: the v4l2_dv_timings struct.
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* @cap: the v4l2_dv_timings_cap capabilities.
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*
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* Returns true if the given dv_timings struct is supported by the
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* hardware capabilities, returns false otherwise.
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*/
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bool v4l2_dv_valid_timings(const struct v4l2_dv_timings *t,
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const struct v4l2_dv_timings_cap *cap);
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/** v4l2_enum_dv_timings_cap() - Helper function to enumerate possible DV timings based on capabilities
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* @t: the v4l2_enum_dv_timings struct.
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* @cap: the v4l2_dv_timings_cap capabilities.
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*
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* This enumerates dv_timings using the full list of possible CEA-861 and DMT
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* timings, filtering out any timings that are not supported based on the
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* hardware capabilities.
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*
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* If a valid timing for the given index is found, it will fill in @t and
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* return 0, otherwise it returns -EINVAL.
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*/
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int v4l2_enum_dv_timings_cap(struct v4l2_enum_dv_timings *t,
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const struct v4l2_dv_timings_cap *cap);
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/** v4l2_find_dv_timings_cap() - Find the closest timings struct
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* @t: the v4l2_enum_dv_timings struct.
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* @cap: the v4l2_dv_timings_cap capabilities.
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* @pclock_delta: maximum delta between t->pixelclock and the timing struct
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* under consideration.
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*
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* This function tries to map the given timings to an entry in the
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* full list of possible CEA-861 and DMT timings, filtering out any timings
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* that are not supported based on the hardware capabilities.
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*
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* On success it will fill in @t with the found timings and it returns true.
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* On failure it will return false.
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*/
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bool v4l2_find_dv_timings_cap(struct v4l2_dv_timings *t,
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const struct v4l2_dv_timings_cap *cap,
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unsigned pclock_delta);
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#endif
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