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rk fb: fix rk_fb_get_prmry_screen_ft cal error

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hjc
2014-04-02 17:58:14 +08:00
parent a6f4f0502c
commit aef4c720a8
1 changed files with 4 additions and 5 deletions
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9
drivers/video/rockchip/rk_fb.c
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@@ -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;
}