include/asm-arm/arch-cl7500/acornfb.h

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