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From 91ee7cb06c5503ae43043453a6cb33c34138cacc Mon Sep 17 00:00:00 2001
From: Anthony Koo <Anthony.Koo@amd.com>
Date: Sun, 20 Jan 2019 01:32:55 -0500
Subject: [PATCH 1227/2940] drm/amd/display: add way to determine if link is
active
[Why]
Need to understand whether link is active aside from stream state.
This could be used to check what links are enabled by GOP.
[How]
Store link_active state in link status and initialize it by checking
if the DIG is enabled.
Keep it updated on every link enable and disable
Change-Id: I6d985d0ec11404bbaba7e4a23d4ca50d519aa0ac
Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 4 ++++
drivers/gpu/drm/amd/display/dc/dc_link.h | 1 +
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 5 +++++
3 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 2f9d9b1f45cf..6058436642e9 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2612,6 +2612,8 @@ void core_link_enable_stream(
}
}
+ stream->link->link_status.link_active = true;
+
core_dc->hwss.enable_audio_stream(pipe_ctx);
/* turn off otg test pattern if enable */
@@ -2646,6 +2648,8 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx, int option)
core_dc->hwss.disable_stream(pipe_ctx, option);
disable_link(pipe_ctx->stream->link, pipe_ctx->stream->signal);
+
+ pipe_ctx->stream->link->link_status.link_active = false;
}
void core_link_set_avmute(struct pipe_ctx *pipe_ctx, bool enable)
diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
index d26bbda61ad2..8fc223defed4 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -30,6 +30,7 @@
#include "grph_object_defs.h"
struct dc_link_status {
+ bool link_active;
struct dpcd_caps *dpcd_caps;
};
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index 2d7096bb0146..b32787ca5e25 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -1027,6 +1027,11 @@ static void dcn10_init_hw(struct dc *dc)
dc->hwss.edp_power_control(link, true);
link->link_enc->funcs->hw_init(link->link_enc);
+
+ /* Check for enabled DIG to identify enabled display */
+ if (link->link_enc->funcs->is_dig_enabled &&
+ link->link_enc->funcs->is_dig_enabled(link->link_enc))
+ link->link_status.link_active = true;
}
}
--
2.17.1
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