drm/amd/display: skip enable stream on disconnected display (ef5a7d26) · Commits · 戴 / test

[why] Virtual signal means there is no display attached. In this case we will assign a virtual signal type to the stream. We should only enable the front end of the stream but not the back end. [how] When stream is enabling with virtual signal type, skip backend programming. Signed-off-by:

Wenjing Liu <Wenjing.Liu@amd.com> Reviewed-by:

Jun Lei <Jun.Lei@amd.com> Acked-by:

Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Signed-off-by:

Alex Deucher <alexander.deucher@amd.com>

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

+8 −0

Original line number	Diff line number	Diff line
		@@ -2718,6 +2718,10 @@ void core_link_enable_stream(
		enum dc_status status;
		DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);

		if (!IS_FPGA_MAXIMUS_DC(core_dc->ctx->dce_environment) &&
		dc_is_virtual_signal(pipe_ctx->stream->signal))
		return;

		if (!dc_is_virtual_signal(pipe_ctx->stream->signal)) {
		stream->link->link_enc->funcs->setup(
		stream->link->link_enc,
		@@ -2860,6 +2864,10 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx)
		struct dc_stream_state *stream = pipe_ctx->stream;
		struct dc_link *link = stream->sink->link;

		if (!IS_FPGA_MAXIMUS_DC(core_dc->ctx->dce_environment) &&
		dc_is_virtual_signal(pipe_ctx->stream->signal))
		return;

		#if defined(CONFIG_DRM_AMD_DC_HDCP)
		update_psp_stream_config(pipe_ctx, true);
		#endif

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