git.oblomov.eu Git - linux-2.6/blob - include/asm-arm/arch-cl7500/acornfb.h

   1 #define acornfb_valid_pixrate(var) (var->pixclock >= 39325 && var->pixclock <= 40119)
   2
   3 static inline void
   4 acornfb_vidc20_find_rates(struct vidc_timing *vidc,
   5                           struct fb_var_screeninfo *var)
   6 {
   7         u_int bandwidth;
   8
   9         vidc->control |= VIDC20_CTRL_PIX_CK;
  10
  11         /* Calculate bandwidth */
  12         bandwidth = var->pixclock * 8 / var->bits_per_pixel;
  13
  14         /* Encode bandwidth as VIDC20 setting */
  15         if (bandwidth > 16667*2)
  16                 vidc->control |= VIDC20_CTRL_FIFO_16;
  17         else if (bandwidth > 13333*2)
  18                 vidc->control |= VIDC20_CTRL_FIFO_20;
  19         else if (bandwidth > 11111*2)
  20                 vidc->control |= VIDC20_CTRL_FIFO_24;
  21         else
  22                 vidc->control |= VIDC20_CTRL_FIFO_28;
  23
  24         vidc->pll_ctl  = 0x2020;
  25 }
  26
  27 #ifdef CONFIG_CHRONTEL_7003
  28 #define acornfb_default_control()       VIDC20_CTRL_PIX_HCLK
  29 #else
  30 #define acornfb_default_control()       VIDC20_CTRL_PIX_VCLK
  31 #endif
  32
  33 #define acornfb_default_econtrol()      VIDC20_ECTL_DAC | VIDC20_ECTL_REG(3) | VIDC20_ECTL_ECK