From 8dea49605f6e21b5b380b0cae7f1f1160675e3ee Mon Sep 17 00:00:00 2001 From: Jun Lei Date: Mon, 15 Apr 2019 14:52:25 -0400 Subject: [PATCH] drm/amd/display: add support for disconnected eDP panels [why] On some configurations, eDP from GPU is muxed with another GPU. DC does not know state of mux, but DM has this knowledge. This flag allows DC to ignore creating EDP link when DM informs DC that EDP mux is not connected. [how] Add flag to dc, populate flag in DM Signed-off-by: Jun Lei Reviewed-by: Tony Cheng Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc.c | 11 ++++++++--- drivers/gpu/drm/amd/display/dc/dc.h | 1 + 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index ee6b646180b6..700278216424 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -169,9 +169,14 @@ static bool create_links( link = link_create(&link_init_params); if (link) { - dc->links[dc->link_count] = link; - link->dc = dc; - ++dc->link_count; + if (dc->config.edp_not_connected && + link->connector_signal == SIGNAL_TYPE_EDP) { + link_destroy(&link); + } else { + dc->links[dc->link_count] = link; + link->dc = dc; + ++dc->link_count; + } } } diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index a7144cd189cf..12ca75388362 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -205,6 +205,7 @@ struct dc_config { bool disable_fractional_pwm; bool allow_seamless_boot_optimization; bool power_down_display_on_boot; + bool edp_not_connected; }; enum visual_confirm { -- 2.30.2