diff options
Diffstat (limited to 'drivers/video/da8xx-fb.c')
| -rw-r--r-- | drivers/video/da8xx-fb.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c index 7dfa7a70fcf..9a05ccbd46c 100644 --- a/drivers/video/da8xx-fb.c +++ b/drivers/video/da8xx-fb.c @@ -411,6 +411,21 @@ static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width, | (((front_porch-1) & 0xff) << 16) | (((pulse_width-1) & 0x3f) << 10); lcdc_write(reg, LCD_RASTER_TIMING_0_REG); + + /* + * LCDC Version 2 adds some extra bits that increase the allowable + * size of the horizontal timing registers. + * remember that the registers use 0 to represent 1 so all values + * that get set into register need to be decremented by 1 + */ + if (lcd_revision == LCD_VERSION_2) { + /* Mask off the bits we want to change */ + reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & ~0x780000ff; + reg |= ((front_porch-1) & 0x300) >> 8; + reg |= ((back_porch-1) & 0x300) >> 4; + reg |= ((pulse_width-1) & 0x3c0) << 21; + lcdc_write(reg, LCD_RASTER_TIMING_2_REG); + } } static void lcd_cfg_vertical_sync(int back_porch, int pulse_width, |