From 2ea7bdc8173366e5338e0ac52e6df939d3847b07 Mon Sep 17 00:00:00 2001
From: Nikola Cornij <nikola.cornij@amd.com>
Date: Mon, 9 Dec 2019 18:54:26 -0500
Subject: drm/amd/display: Disable secondary link for certain monitors
Git-commit: 6d822156d0b6f529aa95d55286742c908f5b4e35
Patch-mainline: v5.6-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

[why]
If the specific monitor supports DSC, the secondary link should be
disabled, and the other way around, too: if either that monitor or
our ASIC doesn't support DSC, the secodary link should be enabled.

[how]
Add a monitor patch and disable secondary link if that monitor
is detected and if ASIC supports DSC, or otherwise enable secondary
link.

Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Reviewed-by: Joshua Aberback <Joshua.Aberback@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 10 +++++++---
 drivers/gpu/drm/amd/display/dc/dc.h               |  2 ++
 drivers/gpu/drm/amd/display/dc/dc_types.h         |  1 +
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 64a0e08fd019..a0eb9e533a61 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -2066,6 +2066,13 @@ void dc_resource_state_construct(
 	dst_ctx->clk_mgr = dc->clk_mgr;
 }
 
+
+bool dc_resource_is_dsc_encoding_supported(const struct dc *dc)
+{
+	return dc->res_pool->res_cap->num_dsc > 0;
+}
+
+
 /**
  * dc_validate_global_state() - Determine if HW can support a given state
  * Checks HW resource availability and bandwidth requirement.
@@ -2897,6 +2904,3 @@ void get_audio_check(struct audio_info *aud_modes,
 	}
 }
 
-
-
-
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index c4e6c696f06f..29762b0531fc 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -910,6 +910,8 @@ void dc_resource_state_copy_construct_current(
 
 void dc_resource_state_destruct(struct dc_state *context);
 
+bool dc_resource_is_dsc_encoding_supported(const struct dc *dc);
+
 /*
  * TODO update to make it about validation sets
  * Set up streams and links associated to drive sinks
diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h
index b1a372c8df83..4b5b97520733 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
@@ -229,6 +229,7 @@ struct dc_panel_patch {
 	unsigned int extra_t12_ms;
 	unsigned int extra_delay_backlight_off;
 	unsigned int extra_t7_ms;
+	unsigned int manage_secondary_link;
 };
 
 struct dc_edid_caps {
-- 
2.28.0