+ s3c-fb-automatically-calculate-pixel-clock-when-none-is-given.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     s3c-fb: automatically calculate pixel clock when none is given
has been added to the -mm tree.  Its filename is
     s3c-fb-automatically-calculate-pixel-clock-when-none-is-given.patch

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------------------------------------------------------
Subject: s3c-fb: automatically calculate pixel clock when none is given
From: Maurus Cuelenaere <mcuelenaere@gmail.com>

Add a simple algorithm which calculates the pixel clock based on the video
mode parameters.  This is only done when no pixel clock is supplied
through the platform data.

Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com>
Cc: Pawel Osciak <p.osciak@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: InKi Dae <inki.dae@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/video/s3c-fb.c |   25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff -puN drivers/video/s3c-fb.c~s3c-fb-automatically-calculate-pixel-clock-when-none-is-given drivers/video/s3c-fb.c
--- a/drivers/video/s3c-fb.c~s3c-fb-automatically-calculate-pixel-clock-when-none-is-given
+++ a/drivers/video/s3c-fb.c
@@ -1027,6 +1027,28 @@ static struct fb_ops s3c_fb_ops = {
 };
 
 /**
+ * s3c_fb_missing_pixclock() - calculates pixel clock
+ * @mode: The video mode to change.
+ *
+ * Calculate the pixel clock when none has been given through platform data.
+ */
+static void __devinit s3c_fb_missing_pixclock(struct fb_videomode *mode)
+{
+	u64 pixclk = 1000000000000ULL;
+	u32 div;
+
+	div  = mode->left_margin + mode->hsync_len + mode->right_margin +
+	       mode->xres;
+	div *= mode->upper_margin + mode->vsync_len + mode->lower_margin +
+	       mode->yres;
+	div *= mode->refresh ? : 60;
+
+	do_div(pixclk, div);
+
+	mode->pixclock = pixclk;
+}
+
+/**
  * s3c_fb_alloc_memory() - allocate display memory for framebuffer window
  * @sfb: The base resources for the hardware.
  * @win: The window to initialise memory for.
@@ -1364,6 +1386,9 @@ static int __devinit s3c_fb_probe(struct
 		if (!pd->win[win])
 			continue;
 
+		if (!pd->win[win]->win_mode.pixclock)
+			s3c_fb_missing_pixclock(&pd->win[win]->win_mode);
+
 		ret = s3c_fb_probe_win(sfb, win, fbdrv->win[win],
 				       &sfb->windows[win]);
 		if (ret < 0) {
_

Patches currently in -mm which might be from mcuelenaere@gmail.com are

linux-next.patch
s3c-fb-automatically-calculate-pixel-clock-when-none-is-given.patch