linux-kernel - [PATCH 09/10] video: da8xx-fb: report correct pixclock

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Message-ID: <1936484ebde94f0c18462f2eec2dab05da087b27.1354874432.git.afzal@ti.com>
Date:	Fri, 7 Dec 2012 17:14:25 +0530
From:	Afzal Mohammed <afzal@...com>
To:	Florian Tobias Schandinat <FlorianSchandinat@....de>,
	Tomi Valkeinen <tomi.valkeinen@...com>
CC:	Vaibhav Hiremath <hvaibhav@...com>, Sekhar Nori <nsekhar@...com>,
	<linux-fbdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Afzal Mohammed <afzal@...com>
Subject: [PATCH 09/10] video: da8xx-fb: report correct pixclock

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

Signed-off-by: Afzal Mohammed <afzal@...com>
---
 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;
 }
 
-- 
1.7.12

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