drm/amd/display: set lttpr mode before link settings (bcc5042a) · Commits · 戴 / test

[Why] Some lttpr devices do not work properly when lttpr mode is configured after link settings. [How] Move lttpr configuration before lane settings. Signed-off-by:

abdoulaye berthe <abdoulaye.berthe@amd.com> Reviewed-by:

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

Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by:

Alex Deucher <alexander.deucher@amd.com>

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

+4 −2

Original line number	Diff line number	Diff line
		@@ -1446,6 +1446,10 @@ enum link_training_result dc_link_dp_perform_link_training(
		&link->preferred_training_settings,
		&lt_settings);

		/* Configure lttpr mode */
		if (!link->is_lttpr_mode_transparent)
		configure_lttpr_mode(link);

		if (link->ctx->dc->work_arounds.lt_early_cr_pattern)
		start_clock_recovery_pattern_early(link, &lt_settings, DPRX);

		@@ -1460,8 +1464,6 @@ enum link_training_result dc_link_dp_perform_link_training(
		dp_set_fec_ready(link, fec_enable);

		if (!link->is_lttpr_mode_transparent) {
		/* Configure lttpr mode */
		configure_lttpr_mode(link);

		/* 2. perform link training (set link training done
		* to false is done as well)

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