From 3f7a326d7508b0af05fb19714990851125707c8e Mon Sep 17 00:00:00 2001
From: Aurabindo Pillai <aurabindo.pillai@amd.com>
Date: Wed, 11 Aug 2021 14:38:44 -0400
Subject: drm/amd/display: Add emulated sink support for updating FS
Git-commit: 9b2fdc332189334f8b33ff5d62594a2fb65794f0
Patch-mainline: v5.16-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

[Why]
When forced modes are used during certain IGT tests,
without a real connector, dc_sink would be null when
standard modes are added by the driver. Calling the
function to update freesync capabilities at this
point will result in an error being printed

[How]
Use emulated sink when available. If both the normal
and emulated sink are not available, set all freesync
parameters to 0.

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <Daniel.Wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 20 +++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index ecc7e7dbe035..4819302b7562 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -10982,6 +10982,7 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 			to_amdgpu_dm_connector(connector);
 	struct dm_connector_state *dm_con_state = NULL;
+	struct dc_sink *sink = amdgpu_dm_connector->dc_sink;
 
 	struct drm_device *dev = connector->dev;
 	struct amdgpu_device *adev = drm_to_adev(dev);
@@ -10993,28 +10994,31 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 		goto update;
 	}
 
-	if (!edid) {
+	sink = amdgpu_dm_connector->dc_sink ?
+		amdgpu_dm_connector->dc_sink :
+		amdgpu_dm_connector->dc_em_sink;
+
+	if (!edid || !sink) {
 		dm_con_state = to_dm_connector_state(connector->state);
 
 		amdgpu_dm_connector->min_vfreq = 0;
 		amdgpu_dm_connector->max_vfreq = 0;
 		amdgpu_dm_connector->pixel_clock_mhz = 0;
+		connector->display_info.monitor_range.min_vfreq = 0;
+		connector->display_info.monitor_range.max_vfreq = 0;
+		freesync_capable = false;
 
 		goto update;
 	}
 
 	dm_con_state = to_dm_connector_state(connector->state);
 
-	if (!amdgpu_dm_connector->dc_sink) {
-		DRM_ERROR("dc_sink NULL, could not add free_sync module.\n");
-		goto update;
-	}
 	if (!adev->dm.freesync_module)
 		goto update;
 
 
-	if (amdgpu_dm_connector->dc_sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT
-		|| amdgpu_dm_connector->dc_sink->sink_signal == SIGNAL_TYPE_EDP) {
+	if (sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT
+		|| sink->sink_signal == SIGNAL_TYPE_EDP) {
 		bool edid_check_required = false;
 
 		if (edid) {
@@ -11061,7 +11065,7 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 				freesync_capable = true;
 			}
 		}
-	} else if (edid && amdgpu_dm_connector->dc_sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A) {
+	} else if (edid && sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A) {
 		i = parse_hdmi_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
 		if (i >= 0 && vsdb_info.freesync_supported) {
 			timing  = &edid->detailed_timings[i];
-- 
2.38.1