drm/amd/display: Power down front end in init_hw.

front end is initialized during init_hw, but not
power gated. There are some left over valuse and will
cause some diags test failed. Power gated all front
end pipes will make sure every test has same starting
point.
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -414,91 +414,6 @@ static void bios_golden_init(struct dc *dc)
 	}
 }
 
-static void dcn10_init_hw(struct dc *dc)
-{
-	int i;
-	struct abm *abm = dc->res_pool->abm;
-	struct dmcu *dmcu = dc->res_pool->dmcu;
-	struct dce_hwseq *hws = dc->hwseq;
-
-	if (IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment)) {
-		REG_WRITE(REFCLK_CNTL, 0);
-		REG_UPDATE(DCHUBBUB_GLOBAL_TIMER_CNTL, DCHUBBUB_GLOBAL_TIMER_ENABLE, 1);
-		REG_WRITE(DIO_MEM_PWR_CTRL, 0);
-
-		if (!dc->debug.disable_clock_gate) {
-			/* enable all DCN clock gating */
-			REG_WRITE(DCCG_GATE_DISABLE_CNTL, 0);
-
-			REG_WRITE(DCCG_GATE_DISABLE_CNTL2, 0);
-
-			REG_UPDATE(DCFCLK_CNTL, DCFCLK_GATE_DIS, 0);
-		}
-
-		enable_power_gating_plane(dc->hwseq, true);
-		return;
-	}
-	/* end of FPGA. Below if real ASIC */
-
-	bios_golden_init(dc);
-
-	disable_vga(dc->hwseq);
-
-	for (i = 0; i < dc->link_count; i++) {
-		/* Power up AND update implementation according to the
-		 * required signal (which may be different from the
-		 * default signal on connector).
-		 */
-		struct dc_link *link = dc->links[i];
-
-		link->link_enc->funcs->hw_init(link->link_enc);
-	}
-
-	for (i = 0; i < dc->res_pool->pipe_count; i++) {
-		struct dpp *dpp = dc->res_pool->dpps[i];
-		struct timing_generator *tg = dc->res_pool->timing_generators[i];
-
-		dpp->funcs->dpp_reset(dpp);
-		dc->res_pool->mpc->funcs->remove(
-				dc->res_pool->mpc, &(dc->res_pool->opps[i]->mpc_tree),
-				dc->res_pool->opps[i]->inst, i);
-
-		/* Blank controller using driver code instead of
-		 * command table.
-		 */
-		tg->funcs->set_blank(tg, true);
-		hwss_wait_for_blank_complete(tg);
-	}
-
-	for (i = 0; i < dc->res_pool->audio_count; i++) {
-		struct audio *audio = dc->res_pool->audios[i];
-
-		audio->funcs->hw_init(audio);
-	}
-
-	if (abm != NULL) {
-		abm->funcs->init_backlight(abm);
-		abm->funcs->abm_init(abm);
-	}
-
-	if (dmcu != NULL)
-		dmcu->funcs->dmcu_init(dmcu);
-
-	/* power AFMT HDMI memory TODO: may move to dis/en output save power*/
-	REG_WRITE(DIO_MEM_PWR_CTRL, 0);
-
-	if (!dc->debug.disable_clock_gate) {
-		/* enable all DCN clock gating */
-		REG_WRITE(DCCG_GATE_DISABLE_CNTL, 0);
-
-		REG_WRITE(DCCG_GATE_DISABLE_CNTL2, 0);
-
-		REG_UPDATE(DCFCLK_CNTL, DCFCLK_GATE_DIS, 0);
-	}
-
-	enable_power_gating_plane(dc->hwseq, true);
-}
-
 static enum dc_status dcn10_prog_pixclk_crtc_otg(
 		struct pipe_ctx *pipe_ctx,
 		struct dc_state *context,
@@ -784,6 +699,93 @@ static void dcn10_power_down_fe(struct dc *dc, int fe_idx)
 		verify_allow_pstate_change_high(dc->hwseq);
 }
 
+static void dcn10_init_hw(struct dc *dc)
+{
+	int i;
+	struct abm *abm = dc->res_pool->abm;
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+	struct dce_hwseq *hws = dc->hwseq;
+
+	if (IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment)) {
+		REG_WRITE(REFCLK_CNTL, 0);
+		REG_UPDATE(DCHUBBUB_GLOBAL_TIMER_CNTL, DCHUBBUB_GLOBAL_TIMER_ENABLE, 1);
+		REG_WRITE(DIO_MEM_PWR_CTRL, 0);
+
+		if (!dc->debug.disable_clock_gate) {
+			/* enable all DCN clock gating */
+			REG_WRITE(DCCG_GATE_DISABLE_CNTL, 0);
+
+			REG_WRITE(DCCG_GATE_DISABLE_CNTL2, 0);
+
+			REG_UPDATE(DCFCLK_CNTL, DCFCLK_GATE_DIS, 0);
+		}
+
+		enable_power_gating_plane(dc->hwseq, true);
+		return;
+	}
+	/* end of FPGA. Below if real ASIC */
+
+	bios_golden_init(dc);
+
+	disable_vga(dc->hwseq);
+
+	for (i = 0; i < dc->link_count; i++) {
+		/* Power up AND update implementation according to the
+		 * required signal (which may be different from the
+		 * default signal on connector).
+		 */
+		struct dc_link *link = dc->links[i];
+
+		link->link_enc->funcs->hw_init(link->link_enc);
+	}
+
+	for (i = 0; i < dc->res_pool->pipe_count; i++) {
+		struct dpp *dpp = dc->res_pool->dpps[i];
+		struct timing_generator *tg = dc->res_pool->timing_generators[i];
+
+		dpp->funcs->dpp_reset(dpp);
+		dc->res_pool->mpc->funcs->remove(
+				dc->res_pool->mpc, &(dc->res_pool->opps[i]->mpc_tree),
+				dc->res_pool->opps[i]->inst, i);
+
+		/* Blank controller using driver code instead of
+		 * command table.
+		 */
+		tg->funcs->set_blank(tg, true);
+		hwss_wait_for_blank_complete(tg);
+
+		dcn10_power_down_fe(dc, i);
+	}
+
+	for (i = 0; i < dc->res_pool->audio_count; i++) {
+		struct audio *audio = dc->res_pool->audios[i];
+
+		audio->funcs->hw_init(audio);
+	}
+
+	if (abm != NULL) {
+		abm->funcs->init_backlight(abm);
+		abm->funcs->abm_init(abm);
+	}
+
+	if (dmcu != NULL)
+		dmcu->funcs->dmcu_init(dmcu);
+
+	/* power AFMT HDMI memory TODO: may move to dis/en output save power*/
+	REG_WRITE(DIO_MEM_PWR_CTRL, 0);
+
+	if (!dc->debug.disable_clock_gate) {
+		/* enable all DCN clock gating */
+		REG_WRITE(DCCG_GATE_DISABLE_CNTL, 0);
+
+		REG_WRITE(DCCG_GATE_DISABLE_CNTL2, 0);
+
+		REG_UPDATE(DCFCLK_CNTL, DCFCLK_GATE_DIS, 0);
+	}
+
+	enable_power_gating_plane(dc->hwseq, true);
+}
+
 static void reset_hw_ctx_wrap(
 		struct dc *dc,
 		struct dc_state *context)