The VT divisor search can be ended if we've already found the value that
corresponds exactly the total divisor, as there are no better (lower)
values available.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
drivers/media/i2c/ccs-pll.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/media/i2c/ccs-pll.c b/drivers/media/i2c/ccs-pll.c
index ea0f84fc8a90..22e29127804a 100644
--- a/drivers/media/i2c/ccs-pll.c
+++ b/drivers/media/i2c/ccs-pll.c
@@ -352,6 +352,7 @@ __ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
sys_div <= max_sys_div;
sys_div += 2 - (sys_div & 1)) {
uint16_t pix_div = DIV_ROUND_UP(vt_div, sys_div);
+ uint16_t rounded_div;
if (pix_div < lim->vt_bk.min_pix_clk_div
|| pix_div > lim->vt_bk.max_pix_clk_div) {
@@ -363,10 +364,15 @@ __ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim,
continue;
}
+ rounded_div = roundup(vt_div, best_pix_div);
+
/* Check if this one is better. */
- if (pix_div * sys_div
- <= roundup(vt_div, best_pix_div))
+ if (pix_div * sys_div <= rounded_div)
best_pix_div = pix_div;
+
+ /* Bail out if we've already found the best value. */
+ if (vt_div == rounded_div)
+ break;
}
if (best_pix_div < INT_MAX >> 1)
break;
--
2.27.0
