[PATCH 03/17] drm/amd/display: Populate hostvm parameter before DML calculation

[Bindu Ramamurthy]

From: Sung Lee <sung.lee at amd.com>

[Why]
If the system does not have hostvm enabled, disabling it for
DML validation will allow more modes to pass at lower voltage
levels.

[How]
When initializing HostVM save state to hubbub and read back
when populating DML pipes from context.

Signed-off-by: Sung Lee <sung.lee at amd.com>
Acked-by: Bindu Ramamurthy <bindu.r at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c   | 2 ++
 drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 2 +-
 drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h      | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c
index 129f0b62f751..42fbb5e6d505 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c
@@ -99,6 +99,8 @@ void dcn21_dchvm_init(struct hubbub *hubbub)
 
 		//Poll until HOSTVM_PREFETCH_DONE = 1
 		REG_WAIT(DCHVM_RIOMMU_STAT0, HOSTVM_PREFETCH_DONE, 1, 5, 100);
+
+		hubbub->riommu_active = true;
 	}
 }
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
index ed3f62535301..1c88d2edd381 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -1886,7 +1886,7 @@ static int dcn21_populate_dml_pipes_from_context(
 
 	for (i = 0; i < pipe_cnt; i++) {
 
-		pipes[i].pipe.src.hostvm = 1;
+		pipes[i].pipe.src.hostvm = dc->res_pool->hubbub->riommu_active;
 		pipes[i].pipe.src.gpuvm = 1;
 	}
 
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h b/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
index 5425e92efcb8..d9fd28b34f2a 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
@@ -157,6 +157,7 @@ struct hubbub_funcs {
 struct hubbub {
 	const struct hubbub_funcs *funcs;
 	struct dc_context *ctx;
+	bool riommu_active;
 };
 
 #endif
-- 
2.25.1