From: Melissa Wen <mwen@igalia.com>
Date: Tue, 28 Jan 2025 00:41:10 +0000 (-0300)
Subject: drm/amd/display: restore invalid MSA timing check for freesync
X-Git-Tag: v6.14-rc1~13^2^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7f2b5237e313e39008a85b33ca94ab503a8fdff9;p=thirdparty%2Fkernel%2Flinux.git

drm/amd/display: restore invalid MSA timing check for freesync

This restores the original behavior that gets min/max freq from EDID and
only set DP/eDP connector as freesync capable if "sink device is capable
of rendering incoming video stream without MSA timing parameters", i.e.,
`allow_invalid_MSA_timing_params` is true. The condition was mistakenly
removed by 0159f88a99c9 ("drm/amd/display: remove redundant freesync
parser for DP").

CC: Mario Limonciello <mario.limonciello@amd.com>
CC: Alex Hung <alex.hung@amd.com>
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3915
Fixes: 0159f88a99c9 ("drm/amd/display: remove redundant freesync parser for DP")
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---

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 b0e66c05d8111..ac3fd81fecef2 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -12326,10 +12326,14 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 
 	if (edid && (sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT ||
 		     sink->sink_signal == SIGNAL_TYPE_EDP)) {
-		amdgpu_dm_connector->min_vfreq = connector->display_info.monitor_range.min_vfreq;
-		amdgpu_dm_connector->max_vfreq = connector->display_info.monitor_range.max_vfreq;
-		if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10)
-			freesync_capable = true;
+		if (amdgpu_dm_connector->dc_link &&
+		    amdgpu_dm_connector->dc_link->dpcd_caps.allow_invalid_MSA_timing_param) {
+			amdgpu_dm_connector->min_vfreq = connector->display_info.monitor_range.min_vfreq;
+			amdgpu_dm_connector->max_vfreq = connector->display_info.monitor_range.max_vfreq;
+			if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10)
+				freesync_capable = true;
+		}
+
 		parse_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
 
 		if (vsdb_info.replay_mode) {