During the initialization,the imx6 ipu linux diver will write the dc registers. but I can't find writing address in the rm? where does the config write to? :
void ipu_init_dc_mappings(void)
{
/* IPU_PIX_FMT_RGB24 */
...
ipu_dc_map_config(0, 0, 7, 0xFF);
ipu_dc_map_config(0, 1, 15, 0xFF);
...
}
static void _ipu_dc_map_config(struct ipu_soc *ipu,
int map, int byte_num, int offset, int mask)
{
...
ipu_dc_write(ipu, reg, DC_MAP_CONF_VAL(ptr));
// I log the reg offset addr like this:
printk("_ipu_dc_map_config1 %d %d %d %x,%x %x\n",map,byte_num,offset,mask,reg,DC_MAP_CONF_VAL(ptr));
...
}
the log shows the offset addr are 0x51 0x52 0x55 ...
arroding the ipu writing func,the offset addres above don't exist!
static inline void ipu_dc_write(struct ipu_soc *ipu,
u32 value, unsigned offset)
{
writel(value, ipu->dc_reg + offset);
}
| #define DC_MAP_CONF_PTR(n) | (0x0108/4 + n/2) |
| #define DC_MAP_CONF_VAL(n) | (0x0144/4 + n/2) |
