Commit 97fa4dfa authored by Gabe Teeger's avatar Gabe Teeger Committed by Alex Deucher
Browse files

drm/amd/display: Enable HostVM based on rIOMMU active 



[Why]
There is underflow and flickering occuring. The
underflow stops when hostvm is forced to active.
According to policy, hostvm should be enabled if riommu
is active, but this is not taken into account when
deciding whether to enable hostvm.

[What]
For DCN314, set hostvm to true if riommu is active.

Reviewed-by: default avatarNicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: default avatarQingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: default avatarGabe Teeger <gabe.teeger@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b5ac7036

drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c

+4 −0
Original line number Diff line number Diff line
@@ -308,6 +308,10 @@ int dcn314_populate_dml_pipes_from_context_fpu(struct dc *dc, struct dc_state *c 
				pipe->plane_state->src_rect.width < pipe->plane_state->dst_rect.width))

			upscaled = true;



		/* Apply HostVM policy - either based on hypervisor globally enabled, or rIOMMU active */

		if (dc->debug.dml_hostvm_override == DML_HOSTVM_NO_OVERRIDE)

			pipes[i].pipe.src.hostvm = dc->vm_pa_config.is_hvm_enabled || dc->res_pool->hubbub->riommu_active;



		/*

		 * Immediate flip can be set dynamically after enabling the plane.

		 * We need to require support for immediate flip or underflow can be