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-rw-r--r--drivers/media/v4l2-core/v4l2-dv-timings.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dv-timings.c b/drivers/media/v4l2-core/v4l2-dv-timings.c
index 4e09792038ed..37f0d6f89878 100644
--- a/drivers/media/v4l2-core/v4l2-dv-timings.c
+++ b/drivers/media/v4l2-core/v4l2-dv-timings.c
@@ -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;
}
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