mirror of
https://github.com/torvalds/linux.git
synced 2024-12-07 11:31:41 +00:00
[media] v4l2-dv-timings: replace hsync magic number with a macro
This change will not change timing calculation. In CVT generator spreadsheet the nominal value of hsync (as a percentage of line) is 8 percent. Cc: Martin Bugge <marbugge@cisco.com> Signed-off-by: Prashant Laddha <prladdha@cisco.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
parent
947ed99e5d
commit
9c3f205252
@ -313,6 +313,7 @@ EXPORT_SYMBOL_GPL(v4l2_print_dv_timings);
|
||||
#define CVT_MIN_V_BPORCH 7 /* lines */
|
||||
#define CVT_MIN_V_PORCH_RND 3 /* lines */
|
||||
#define CVT_MIN_VSYNC_BP 550 /* min time of vsync + back porch (us) */
|
||||
#define CVT_HSYNC_PERCENT 8 /* nominal hsync as percentage of line */
|
||||
|
||||
/* Normal blanking for CVT uses GTF to calculate horizontal blanking */
|
||||
#define CVT_CELL_GRAN 8 /* character cell granularity */
|
||||
@ -442,7 +443,7 @@ bool v4l2_detect_cvt(unsigned frame_height, unsigned hfreq, unsigned vsync,
|
||||
h_bp = h_blank / 2;
|
||||
frame_width = image_width + h_blank;
|
||||
|
||||
hsync = frame_width * 8 / 100;
|
||||
hsync = frame_width * CVT_HSYNC_PERCENT / 100;
|
||||
hsync = (hsync / CVT_CELL_GRAN) * CVT_CELL_GRAN;
|
||||
h_fp = h_blank - hsync - h_bp;
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user