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From ac37f391082bdbbd9919148b911b0ad54deccb45 Mon Sep 17 00:00:00 2001
From: Harry Wentland <harry.wentland@amd.com>
Date: Tue, 12 Jan 2016 12:29:09 -0500
Subject: [PATCH 0687/1110] drm/amd/dal: Don't deallocate payloads when whole
chain disconnected
When the whole MST chain is disconnected we don't want to
deallocate payloads at reset_mode. dc_helpers_dp_mst_stop_top_mgr
will already clean up mst_mgr internal state.
When switching the first MST monitor in a daisy-chain from MST to SST mode
this way we avoid GPIO collision between DPCD access for deallocating
the old MST displays and EDID read for the new SST dispaly.
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Jordan Lazare <Jordan.Lazare@amd.com>
---
drivers/gpu/drm/amd/dal/dc/core/dc_link.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/dal/dc/core/dc_link.c b/drivers/gpu/drm/amd/dal/dc/core/dc_link.c
index a634a44..8bd254c 100644
--- a/drivers/gpu/drm/amd/dal/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/dal/dc/core/dc_link.c
@@ -1501,7 +1501,8 @@ void core_link_disable_stream(
{
struct dc *dc = stream->ctx->dc;
- if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
+ if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST &&
+ link->public.type == dc_connection_mst_branch)
deallocate_mst_payload(stream);
dc->hwss.disable_stream(stream);
--
2.7.4
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