# \[PATCH v2 09/10\] video: da8xx-fb: report correct pixclock

- From: Afzal Mohammed \<hidden\>
- Date: 2013-01-07 05:06:04 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2013/01/3979150
- Thread: https://ratatoskr.run/linux-omap/2013/01/3979140/t.md

```text
Update "var" pixclock with the value that is configurable in hardware.
This lets user know the actual pixclock.

Signed-off-by: Afzal Mohammed <redacted>
---
 drivers/video/da8xx-fb.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index 663b3c5..c7393f1 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -690,6 +690,15 @@ static inline unsigned da8xx_fb_calc_clk_divider(struct da8xx_fb_par *par,
 	return par->lcd_fck_rate / (PICOS2KHZ(pixclock) * 1000);
 }
 
+static inline unsigned da8xx_fb_round_clk(struct da8xx_fb_par *par,
+					  unsigned pixclock)
+{
+	unsigned div;
+
+	div = da8xx_fb_calc_clk_divider(par, pixclock);
+	return KHZ2PICOS(par->lcd_fck_rate / (1000 * div));
+}
+
 static inline void da8xx_fb_config_clk_divider(unsigned div)
 {
 	/* Configure the LCD clock divisor. */
@@ -966,6 +975,8 @@ static int fb_check_var(struct fb_var_screeninfo *var,
 	if (var->yres + var->yoffset > var->yres_virtual)
 		var->yoffset = var->yres_virtual - var->yres;
 
+	var->pixclock = da8xx_fb_round_clk(par, var->pixclock);
+
 	return err;
 }
 
-- 
1.7.9.5

```