drm/amd/display: Clean Up VPG Low Mem Power

[WHAT]
One of the current VPG power on calls is unnecessary
Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Agustin Gutierrez Sanchez <agustin.gutierrez@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -71,8 +71,6 @@
 
 #include "dmub/dmub_srv.h"
 
-#include "dcn30/dcn30_vpg.h"
-
 #include "i2caux_interface.h"
 #include "dce/dmub_hw_lock_mgr.h"
 
@@ -2674,9 +2672,6 @@ static void commit_planes_do_stream_update(struct dc *dc,
 		enum surface_update_type update_type,
 		struct dc_state *context)
 {
-#if defined(CONFIG_DRM_AMD_DC_DCN)
-	struct vpg *vpg;
-#endif
 	int j;
 
 	// Stream updates
@@ -2697,11 +2692,6 @@ static void commit_planes_do_stream_update(struct dc *dc,
 					stream_update->vrr_infopacket ||
 					stream_update->vsc_infopacket ||
 					stream_update->vsp_infopacket) {
-#if defined(CONFIG_DRM_AMD_DC_DCN)
-				vpg = pipe_ctx->stream_res.stream_enc->vpg;
-				if (vpg && vpg->funcs->vpg_poweron)
-					vpg->funcs->vpg_poweron(vpg);
-#endif
 				resource_build_info_frame(pipe_ctx);
 				dc->hwss.update_info_frame(pipe_ctx);
 			}

drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c

@@ -49,6 +49,7 @@
 #include "inc/link_dpcd.h"
 #include "dcn10/dcn10_hw_sequencer.h"
 #include "inc/link_enc_cfg.h"
+#include "dcn30/dcn30_vpg.h"
 
 #define DC_LOGGER_INIT(logger)
 
@@ -126,6 +127,18 @@ void dcn31_init_hw(struct dc *dc)
 		REG_UPDATE(MMHUBBUB_MEM_PWR_CNTL, VGA_MEM_PWR_FORCE, 1);
 	}
 
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	if (dc->debug.enable_mem_low_power.bits.vpg && dc->res_pool->stream_enc[0]->vpg->funcs->vpg_powerdown) {
+		// Power down VPGs
+		for (i = 0; i < dc->res_pool->stream_enc_count; i++)
+			dc->res_pool->stream_enc[i]->vpg->funcs->vpg_powerdown(dc->res_pool->stream_enc[i]->vpg);
+#if defined(CONFIG_DRM_AMD_DC_DP2_0)
+		for (i = 0; i < dc->res_pool->hpo_dp_stream_enc_count; i++)
+			dc->res_pool->hpo_dp_stream_enc[i]->vpg->funcs->vpg_powerdown(dc->res_pool->hpo_dp_stream_enc[i]->vpg);
+#endif
+	}
+#endif
+
 	if (dc->ctx->dc_bios->fw_info_valid) {
 		res_pool->ref_clocks.xtalin_clock_inKhz =
 				dc->ctx->dc_bios->fw_info.pll_info.crystal_frequency;

drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c

@@ -1312,10 +1312,6 @@ static struct vpg *dcn31_vpg_create(
 			&vpg_shift,
 			&vpg_mask);
 
-	// Will re-enable hw block when we enable stream
-	// Check for enabled stream before powering down?
-	vpg31_powerdown(&vpg31->base);
-
 	return &vpg31->base;
 }