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From 94a798bd25229ceb7e8037ea292afdf4b6cb2d60 Mon Sep 17 00:00:00 2001
From: Jun Lei <Jun.Lei@amd.com>
Date: Mon, 15 Apr 2019 14:52:25 -0400
Subject: [PATCH 1887/2940] 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
Change-Id: Ia5018dcf52476cad448c02b59cb3f8f3e59856d1
Signed-off-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet Lakha@amd.com>
---
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 03abbf6ce596..fd57fd1faccb 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -175,9 +175,14 @@ 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 183924affc91..a371921b7c53 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -208,6 +208,7 @@ 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 {
--
2.17.1
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