drm/amd/display: prevent S4 test from failing

[why]
limit the vm prefetch check for now, until the feature is fully
verified.

Reviewed-by: Hansen Dsouza <Hansen.Dsouza@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 5752271..c5e200d 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c
@@ -67,15 +67,9 @@ static uint32_t convert_and_clamp(
 void dcn21_dchvm_init(struct hubbub *hubbub)
 {
        struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
-       uint32_t riommu_active, prefetch_done;
+       uint32_t riommu_active;
        int i;
 
-       REG_GET(DCHVM_RIOMMU_STAT0, HOSTVM_PREFETCH_DONE, &prefetch_done);
-
-       if (prefetch_done) {
-               hubbub->riommu_active = true;
-               return;
-       }
        //Init DCHVM block
        REG_UPDATE(DCHVM_CTRL0, HOSTVM_INIT_REQ, 1);