drm/amd/display: wrong VM setting cause invalid DF request from DCN

fix typo in register field.  we are lucky the shift/mask is the same, no behavior change

add globals to experiment with using different VM settings
Signed-off-by: Tony Cheng <tony.cheng@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c

@@ -632,6 +632,9 @@ bool min10_is_flip_pending(struct mem_input *mem_input)
 	return false;
 }
 
+uint32_t aperture_default_system = 1;
+uint32_t context0_default_system; /* = 0;*/
+
 static void min10_set_vm_system_aperture_settings(struct mem_input *mem_input,
 		struct vm_system_aperture_param *apt)
 {
@@ -645,7 +648,7 @@ static void min10_set_vm_system_aperture_settings(struct mem_input *mem_input,
 	mc_vm_apt_high.quad_part = apt->sys_high.quad_part >> 12;
 
 	REG_SET_2(DCN_VM_SYSTEM_APERTURE_DEFAULT_ADDR_MSB, 0,
-		MC_VM_SYSTEM_APERTURE_DEFAULT_SYSTEM, 1, /* 1 = system physical memory */
+		MC_VM_SYSTEM_APERTURE_DEFAULT_SYSTEM, aperture_default_system, /* 1 = system physical memory */
 		MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_MSB, mc_vm_apt_default.high_part);
 	REG_SET(DCN_VM_SYSTEM_APERTURE_DEFAULT_ADDR_LSB, 0,
 		MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_LSB, mc_vm_apt_default.low_part);
@@ -684,9 +687,9 @@ static void min10_set_vm_context0_settings(struct mem_input *mem_input,
 			VM_CONTEXT0_PAGE_TABLE_END_ADDR_LSB, vm0->pte_end.low_part);
 
 	/* fault handling */
-	REG_SET(DCN_VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_MSB, 0,
-			VM_CONTEXT0_PAGE_TABLE_END_ADDR_MSB, vm0->fault_default.high_part);
-	/* VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_SYSTEM, 0 */
+	REG_SET_2(DCN_VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_MSB, 0,
+			VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_MSB, vm0->fault_default.high_part,
+			VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_SYSTEM, context0_default_system);
 	REG_SET(DCN_VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_LSB, 0,
 			VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_LSB, vm0->fault_default.low_part);
 

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.h

@@ -369,6 +369,7 @@ struct dcn_mi_registers {
 	MI_SF(HUBPREQ0_DCN_VM_CONTEXT0_PAGE_TABLE_END_ADDR_MSB, VM_CONTEXT0_PAGE_TABLE_END_ADDR_MSB, mask_sh),\
 	MI_SF(HUBPREQ0_DCN_VM_CONTEXT0_PAGE_TABLE_END_ADDR_LSB, VM_CONTEXT0_PAGE_TABLE_END_ADDR_LSB, mask_sh),\
 	MI_SF(HUBPREQ0_DCN_VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_MSB, VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_MSB, mask_sh),\
+	MI_SF(HUBPREQ0_DCN_VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_MSB, VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_SYSTEM, mask_sh),\
 	MI_SF(HUBPREQ0_DCN_VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_LSB, VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_LSB, mask_sh),\
 	MI_SF(HUBPREQ0_DCN_VM_SYSTEM_APERTURE_LOW_ADDR_MSB, MC_VM_SYSTEM_APERTURE_LOW_ADDR_MSB, mask_sh),\
 	MI_SF(HUBPREQ0_DCN_VM_SYSTEM_APERTURE_LOW_ADDR_LSB, MC_VM_SYSTEM_APERTURE_LOW_ADDR_LSB, mask_sh),\
@@ -522,6 +523,7 @@ struct dcn_mi_registers {
 	type VM_CONTEXT0_PAGE_TABLE_END_ADDR_MSB;\
 	type VM_CONTEXT0_PAGE_TABLE_END_ADDR_LSB;\
 	type VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_MSB;\
+	type VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_SYSTEM;\
 	type VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR_LSB;\
 	type ENABLE_L1_TLB;\
 	type SYSTEM_ACCESS_MODE;\