Commit 718a5569 authored by Xiaodong Yan's avatar Xiaodong Yan Committed by Alex Deucher
Browse files

drm/amd/display: blank dp stream before re-train the link 



[Why]
When link loss happened, monitor can not light up if only re-train the
link.

[How]
Blank all the DP streams on this link before re-train the link, and then
unblank the stream

Signed-off-by: default avatarXiaodong Yan <Xiaodong.Yan@amd.com>
Reviewed-by: default avatarTony Cheng <Tony.Cheng@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 933fe2cb

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

+12 −0
Original line number Diff line number Diff line
@@ -2908,6 +2908,12 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd 
					sizeof(hpd_irq_dpcd_data),

					"Status: ");



		for (i = 0; i < MAX_PIPES; i++) {

			pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i];

			if (pipe_ctx && pipe_ctx->stream && pipe_ctx->stream->link == link)

				link->dc->hwss.blank_stream(pipe_ctx);

		}



		for (i = 0; i < MAX_PIPES; i++) {

			pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i];

			if (pipe_ctx && pipe_ctx->stream && pipe_ctx->stream->link == link)
@@ -2927,6 +2933,12 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd 
		if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)

			dc_link_reallocate_mst_payload(link);



		for (i = 0; i < MAX_PIPES; i++) {

			pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i];

			if (pipe_ctx && pipe_ctx->stream && pipe_ctx->stream->link == link)

				link->dc->hwss.unblank_stream(pipe_ctx, &previous_link_settings);

		}



		status = false;

		if (out_link_loss)

			*out_link_loss = true;

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