I have disabled the unused internal EMIF feature:
*(Uint32*)0x20C00008 |= 0x80000000; // Disable unused internal EMIF feature
The W_SETUP, W_STROBE, W_HOLD, R_SETUP, and R_STROBE register fields all function as advertised. No matter what value the R_HOLD field is programmed with, the R_HOLD period is always the "magical" 24 EMIF cycles.
Extended wait mode is disabled.
Would appreciate some advice.