From: hjc <hjc@rock-chips.com>
Date: Wed, 2 Apr 2014 09:58:14 +0000 (+0800)
Subject: rk fb: fix rk_fb_get_prmry_screen_ft cal error
X-Git-Tag: firefly_0821_release~5637
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=aef4c720a80d0e5a84b17c2b20dfda0175bf6b1b;p=firefly-linux-kernel-4.4.55.git

rk fb: fix rk_fb_get_prmry_screen_ft cal error
---

diff --git a/drivers/video/rockchip/rk_fb.c b/drivers/video/rockchip/rk_fb.c
index 905b3195119f..9e94ea056722 100755
--- a/drivers/video/rockchip/rk_fb.c
+++ b/drivers/video/rockchip/rk_fb.c
@@ -528,20 +528,19 @@ static struct rk_lcdc_driver *rk_get_prmry_lcdc_drv(void)
 int rk_fb_get_prmry_screen_ft(void)
 {
 	struct rk_lcdc_driver *dev_drv = rk_get_prmry_lcdc_drv();
-	uint32_t htotal, vtotal, pix_total, ft_us, dclk_mhz;
+	uint32_t htotal, vtotal, pix_total, ft_us, pixclock_ns;
 
 	if (unlikely(!dev_drv))
 		return 0;
 
-	dclk_mhz = dev_drv->pixclock/(1000*1000);
+	pixclock_ns = dev_drv->pixclock/1000;
 
 	htotal = (dev_drv->cur_screen->mode.upper_margin + dev_drv->cur_screen->mode.lower_margin +
 		dev_drv->cur_screen->mode.yres + dev_drv->cur_screen->mode.vsync_len);
 	vtotal = (dev_drv->cur_screen->mode.left_margin + dev_drv->cur_screen->mode.right_margin +
 		dev_drv->cur_screen->mode.xres + dev_drv->cur_screen->mode.hsync_len);
-	pix_total = htotal*vtotal;
-	ft_us = pix_total / dclk_mhz;
-
+	pix_total = htotal*vtotal/1000;
+	ft_us = pix_total * pixclock_ns;
 	return ft_us;
 }