1 files changed, 31 insertions, 0 deletions

diff --git a/meta/recipes-kernel/linux/linux-omap2-git/beagleboard/06-ensure-fclk.diff b/meta/recipes-kernel/linux/linux-omap2-git/beagleboard/06-ensure-fclk.diff
new file mode 100644
index 0000000000..79871a7208
--- /dev/null
+++ b/meta/recipes-kernel/linux/linux-omap2-git/beagleboard/06-ensure-fclk.diff
@@ -0,0 +1,31 @@
+From: Mans Rullgard <mans@mansr.com>
+Date: Mon, 7 Jul 2008 23:59:08 +0000 (+0100)
+Subject: omapfb: ensure fck/lcd < 173MHz
+X-Git-Url: http://git.mansr.com/?p=linux-omap;a=commitdiff_plain;h=0523ece1bad659c48c66aea364d83f7490e7e5ae
+
+omapfb: ensure fck/lcd < 173MHz
+---
+
+diff --git a/drivers/video/omap/dispc.c b/drivers/video/omap/dispc.c
+index c17371c..85d6cad 100644
+--- a/drivers/video/omap/dispc.c
++++ b/drivers/video/omap/dispc.c
+@@ -738,14 +738,16 @@ static void setup_color_conv_coef(void)
+        MOD_REG_FLD(at2_reg, (1 << 11), ct->full_range);
+ }
+ 
++#define MAX_FCK_LCD 173000000
++
+ static void calc_ck_div(int is_tft, int pck, int *lck_div, int *pck_div)
+ {
+        unsigned long fck, lck;
+ 
+-       *lck_div = 1;
+        pck = max(1, pck);
+        fck = clk_get_rate(dispc.dss1_fck);
+-       lck = fck;
++       *lck_div = (fck + MAX_FCK_LCD - 1) / MAX_FCK_LCD;
++       lck = fck / *lck_div;
+        *pck_div = (lck + pck - 1) / pck;
+        if (is_tft)
+                *pck_div = max(2, *pck_div);