drm/amd/display: fix backlight not off at resume from S4 (cf1835f0) · Commits · 戴 / test

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

+27 −6

Original line number	Diff line number	Diff line
		@@ -914,6 +914,7 @@ void hwss_edp_backlight_control(
		/todo: unhardcode/
		cntl.lanes_number = LANE_COUNT_FOUR;
		cntl.hpd_sel = link->link_enc->hpd_source;
		cntl.signal = SIGNAL_TYPE_EDP;

		/* For eDP, the following delays might need to be considered
		* after link training completed:
		@@ -1407,7 +1408,24 @@ static void disable_vga_and_power_gate_all_controllers(
		}
		}

		static struct dc_link *get_link_for_eDP_not_in_use(
		static struct dc_link *get_link_for_edp(
		struct dc *dc)
		{
		int i;
		struct dc_link *link = NULL;

		/* check if there is an eDP panel not in use */
		for (i = 0; i < dc->link_count; i++) {
		if (dc->links[i]->local_sink &&
		dc->links[i]->local_sink->sink_signal == SIGNAL_TYPE_EDP) {
		link = dc->links[i];
		break;
		}
		}

		return link;
		}
		static struct dc_link *get_link_for_edp_not_in_use(
		struct dc *dc,
		struct dc_state *context)
		{
		@@ -1441,16 +1459,19 @@ static struct dc_link *get_link_for_eDP_not_in_use(
		*/
		void dce110_enable_accelerated_mode(struct dc dc, struct dc_state context)
		{
		struct dc_link *eDP_link_to_turnoff = get_link_for_eDP_not_in_use(dc, context);
		struct dc_link *edp_link_to_turnoff = get_link_for_edp_not_in_use(dc, context);

		struct dc_link *edp_link = get_link_for_edp(dc);

		if (eDP_link_to_turnoff)
		dc->hwss.edp_backlight_control(eDP_link_to_turnoff, false);
		if (edp_link)
		/we need turn off backlight before DP_blank and encoder powered down/
		dc->hwss.edp_backlight_control(edp_link, false);

		power_down_all_hw_blocks(dc);
		disable_vga_and_power_gate_all_controllers(dc);

		if (eDP_link_to_turnoff)
		dc->hwss.edp_power_control(eDP_link_to_turnoff, false);
		if (edp_link_to_turnoff)
		dc->hwss.edp_power_control(edp_link_to_turnoff, false);

		bios_set_scratch_acc_mode_change(dc->ctx->dc_bios);
		}

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