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[v3,09/10] video: da8xx-fb: report correct pixclock

Message ID 0afcc9a2b298874ec1402db6906e0069fd072e45.1358250489.git.afzal@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Afzal Mohammed Jan. 15, 2013, 1:32 p.m. UTC
Update "var" pixclock with the value that is configurable in hardware.
This lets user know the actual pixclock.

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

diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index a5341d0..0f73c76 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -686,6 +686,15 @@  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. */
@@ -962,6 +971,8 @@  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;
 }