code.vuplus.com Git - vuplus_openembedded/blob - packages/linux/linux-omap2-git/beagleboard/06-ensure-fclk.diff

   1 From: Mans Rullgard <mans@mansr.com>
   2 Date: Mon, 7 Jul 2008 23:59:08 +0000 (+0100)
   3 Subject: omapfb: ensure fck/lcd < 173MHz
   4 X-Git-Url: http://git.mansr.com/?p=linux-omap;a=commitdiff_plain;h=0523ece1bad659c48c66aea364d83f7490e7e5ae
   5
   6 omapfb: ensure fck/lcd < 173MHz
   7 ---
   8
   9 diff --git a/drivers/video/omap/dispc.c b/drivers/video/omap/dispc.c
  10 index c17371c..85d6cad 100644
  11 --- a/drivers/video/omap/dispc.c
  12 +++ b/drivers/video/omap/dispc.c
  13 @@ -738,14 +738,16 @@ static void setup_color_conv_coef(void)
  14         MOD_REG_FLD(at2_reg, (1 << 11), ct->full_range);
  15  }
  16
  17 +#define MAX_FCK_LCD 173000000
  18 +
  19  static void calc_ck_div(int is_tft, int pck, int *lck_div, int *pck_div)
  20  {
  21         unsigned long fck, lck;
  22
  23 -       *lck_div = 1;
  24         pck = max(1, pck);
  25         fck = clk_get_rate(dispc.dss1_fck);
  26 -       lck = fck;
  27 +       *lck_div = (fck + MAX_FCK_LCD - 1) / MAX_FCK_LCD;
  28 +       lck = fck / *lck_div;
  29         *pck_div = (lck + pck - 1) / pck;
  30         if (is_tft)
  31                 *pck_div = max(2, *pck_div);