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[media] v4l2-dv-timings: add helpers for vic and pixelaspect ratio

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Add a helper to find timings based on the CEA-861 VIC code. Also,
add a helper that returns the pixel aspect ratio based on the
v4l2_dv_timings struct.

[[email protected]: fix coding style]
Signed-off-by: Hans Verkuil <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Hans Verkuil 2016-07-14 07:59:12 -03:00 • committed by Mauro Carvalho Chehab
commit 652430763f
3 changed files with 77 additions and 3 deletions
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20
include/media/v4l2-dv-timings.h
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@ -100,13 +100,23 @@ bool v4l2_find_dv_timings_cap(struct v4l2_dv_timings *t,
v4l2_check_dv_timings_fnc fnc,
void *fnc_handle);
/**
* v4l2_find_dv_timings_cea861_vic() - find timings based on CEA-861 VIC
* @t: the timings data.
* @vic: CEA-861 VIC code
*
* On success it will fill in @t with the found timings and it returns true.
* On failure it will return false.
*/
bool v4l2_find_dv_timings_cea861_vic(struct v4l2_dv_timings *t, u8 vic);
/**
* v4l2_match_dv_timings() - do two timings match?
*
* @measured: the measured timings data.
* @standard: the timings according to the standard.
* @pclock_delta: maximum delta in Hz between standard->pixelclock and
* the measured timings.
* the measured timings.
* @match_reduced_fps: if true, then fail if V4L2_DV_FL_REDUCED_FPS does not
* match.
*
@ -185,6 +195,14 @@ bool v4l2_detect_gtf(unsigned frame_height, unsigned hfreq, unsigned vsync,
*/
struct v4l2_fract v4l2_calc_aspect_ratio(u8 hor_landscape, u8 vert_portrait);
/**
* v4l2_dv_timings_aspect_ratio - calculate the aspect ratio based on the
* v4l2_dv_timings information.
*
* @t: the timings data.
*/
struct v4l2_fract v4l2_dv_timings_aspect_ratio(const struct v4l2_dv_timings *t);
/*
* reduce_fps - check if conditions for reduced fps are true.
* bt - v4l2 timing structure