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Commit 9c3f2052 authored by Prashant Laddha's avatar Prashant Laddha Committed by Mauro Carvalho Chehab
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[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: default avatarPrashant Laddha <prladdha@cisco.com>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 947ed99e

drivers/media/v4l2-core/v4l2-dv-timings.c

+2 −1
Original line number Diff line number Diff line
@@ -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;

	}