Commit 71afd9d1 authored by Charlene Liu's avatar Charlene Liu Committed by Alex Deucher
Browse files

drm/amd/display: eDP power sequence T9 fail 



Signed-off-by: default avatarCharlene Liu <charlene.liu@amd.com>
Reviewed-by: default avatarAnthony Koo <Anthony.Koo@amd.com>
Acked-by: default avatarHarry Wentland <Harry.Wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 4e772ae5

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

+23 −0
Original line number Diff line number Diff line
@@ -110,6 +110,28 @@ void dp_enable_link_phy( 
	dp_receiver_power_ctrl(link, true);

}



bool edp_receiver_ready_T9(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 (edpRev < DP_EDP_12)

		return true;

	/* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/

	do {

		sinkstatus = 1;

		result = core_link_read_dpcd(link, DP_SINK_STATUS, &sinkstatus, sizeof(sinkstatus));

		if (sinkstatus == 0)

			break;

		if (result != DC_OK)

			break;

		dm_delay_in_microseconds(link->ctx, 100); //MAx T9

	} while (++tries < 50);

	return result;

}



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

{

	if (!link->wa_flags.dp_keep_receiver_powered)
@@ -117,6 +139,7 @@ void dp_disable_link_phy(struct dc_link *link, enum signal_type signal) 


	if (signal == SIGNAL_TYPE_EDP) {

		link->link_enc->funcs->backlight_control(link->link_enc, false);

		edp_receiver_ready_T9(link);

		link->link_enc->funcs->disable_output(link->link_enc, signal);

		link->link_enc->funcs->power_control(link->link_enc, false);

	} else

drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c

+1 −1
Original line number Diff line number Diff line
@@ -744,7 +744,7 @@ void dce110_link_encoder_edp_backlight_control( 
		return;

	}



	if (!enable && !is_panel_powered_on(enc110)) {

	if (!enable && !is_panel_backlight_on(enc110)) {

		dm_logger_write(ctx->logger, LOG_HW_RESUME_S3,

				"%s: panel already powered down. Do nothing.\n",

				__func__);