Commit 9c1a0d9e authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
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media: ccs-pll: End search if there are no better values available 



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: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 9454432a

drivers/media/i2c/ccs-pll.c

+8 −2
Original line number Diff line number Diff line
@@ -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;