Commit 5544a7b5 authored by Charlene Liu's avatar Charlene Liu Committed by Alex Deucher
Browse files

drm/amd/display: avoid doing vm_init multiple time 



[why]
this is to ensure that driver will not reprogram hvm_prefetch_req again if
it is done.

Reviewed-by: default avatarMartin Leung <Martin.Leung@amd.com>
Acked-by: default avatarBrian Chang <Brian.Chang@amd.com>
Signed-off-by: default avatarCharlene Liu <Charlene.Liu@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent c65c71ae

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c

+7 −1
Original line number Diff line number Diff line
@@ -67,9 +67,15 @@ 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;

	uint32_t riommu_active, prefetch_done;

	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);