| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |