drm/amd/display: add eDP 1.2+ polling for T7 (5180d4a4) · Commits · 戴 / test

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

+22 −0

Original line number	Diff line number	Diff line
		@@ -123,6 +123,28 @@ bool edp_receiver_ready_T9(struct dc_link *link)
		} while (++tries < 50);
		return result;
		}
		bool edp_receiver_ready_T7(struct dc_link *link)
		{
		unsigned int tries = 0;
		unsigned char sinkstatus = 0;
		unsigned char edpRev = 0;
		enum dc_status result = DC_OK;

		result = core_link_read_dpcd(link, DP_EDP_DPCD_REV, &edpRev, sizeof(edpRev));
		if (result == DC_OK && edpRev < DP_EDP_12)
		return true;
		/* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/
		do {
		sinkstatus = 0;
		result = core_link_read_dpcd(link, DP_SINK_STATUS, &sinkstatus, sizeof(sinkstatus));
		if (sinkstatus == 1)
		break;
		if (result != DC_OK)
		break;
		udelay(25); //MAx T7 is 50ms
		} while (++tries < 300);
		return result;
		}

		void dp_disable_link_phy(struct dc_link *link, enum signal_type signal)
		{

+5 −1

Original line number	Diff line number	Diff line
		@@ -920,6 +920,7 @@ static void dce110_stream_encoder_dp_blank(
		{
		struct dce110_stream_encoder *enc110 = DCE110STRENC_FROM_STRENC(enc);
		uint32_t retries = 0;
		uint32_t reg1 = 0;
		uint32_t max_retries = DP_BLANK_MAX_RETRY * 10;

		/* Note: For CZ, we are changing driver default to disable
		@@ -928,7 +929,10 @@ static void dce110_stream_encoder_dp_blank(
		* handful of panels that cannot handle disable stream at
		* HBLANK and will result in a white line flash across the
		* screen on stream disable. */

		REG_GET(DP_VID_STREAM_CNTL, DP_VID_STREAM_ENABLE, &reg1);
		if ((reg1 & 0x1) == 0)
		/stream not enabled/
		return;
		/* Specify the video stream disable point
		* (2 = start of the next vertical blank) */
		REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_DIS_DEFER, 2);

+5 −4

Original line number	Diff line number	Diff line
		@@ -927,8 +927,12 @@ void hwss_edp_backlight_control(
		* Enable it in the future if necessary.
		*/
		/* dc_service_sleep_in_milliseconds(50); */
		/edp 1.2/
		if (cntl.action == TRANSMITTER_CONTROL_BACKLIGHT_ON)
		edp_receiver_ready_T7(link);
		link_transmitter_control(ctx->dc_bios, &cntl);
		/edp 1.2/
		if (cntl.action == TRANSMITTER_CONTROL_BACKLIGHT_OFF)
		edp_receiver_ready_T9(link);
		}

		@@ -976,9 +980,6 @@ void dce110_disable_stream(struct pipe_ctx *pipe_ctx, int option)
		*/
		}

		/* blank at encoder level */
		if (dc_is_dp_signal(pipe_ctx->stream->signal))
		pipe_ctx->stream_res.stream_enc->funcs->dp_blank(pipe_ctx->stream_res.stream_enc);

		link->link_enc->funcs->connect_dig_be_to_fe(
		link->link_enc,

+1 −0

Original line number	Diff line number	Diff line
		@@ -52,6 +52,7 @@ void dp_enable_link_phy(

		void dp_receiver_power_ctrl(struct dc_link *link, bool on);
		bool edp_receiver_ready_T9(struct dc_link *link);
		bool edp_receiver_ready_T7(struct dc_link *link);

		void dp_disable_link_phy(struct dc_link *link, enum signal_type signal);