drm/amd/display: reprogram VM config when system resume

[ Upstream commit e5382701 ]

[Why]
The vm config will be clear to 0 when system enter S4. It will
cause hubbub didn't know how to fetch data when system resume.
The flip always pending because earliest_inuse_address and
request_address are different.

[How]
Reprogram VM config when system resume
Signed-off-by: Lewis Huang <Lewis.Huang@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -1585,6 +1585,14 @@ void dc_set_power_state(
 		dc_resource_state_construct(dc, dc->current_state);
 
 		dc->hwss.init_hw(dc);
+
+#ifdef CONFIG_DRM_AMD_DC_DCN2_0
+		if (dc->hwss.init_sys_ctx != NULL &&
+			dc->vm_pa_config.valid) {
+			dc->hwss.init_sys_ctx(dc->hwseq, dc, &dc->vm_pa_config);
+		}
+#endif
+
 		break;
 	default: