[PATCH 10/35] drm/amd/display: Check that vrefresh is in freesync range

[Bhawanpreet Lakha]

From: Ilya Bakoulin <ibakouli at amd.com>

[Why]
Setting monitor refresh rate below freesync range would cause the
monitor to go blank indefinitely with freesync enabled

[How]
Set vrr_supported and ignore_msa_timing_param according to whether
the refresh rate is above or below the minimum freesync frequency.

Change-Id: I7666040400448749d1fe4061da034825b9eb511f
Signed-off-by: Ilya Bakoulin <Ilya.Bakoulin at amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas at amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 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 634e1ed27383..5b8a84088f46 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3113,9 +3113,6 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
 
 	update_stream_signal(stream, sink);
 
-	if (dm_state && dm_state->freesync_capable)
-		stream->ignore_msa_timing_param = true;
-
 finish:
 	if (sink && sink->sink_signal == SIGNAL_TYPE_VIRTUAL && aconnector->base.force != DRM_FORCE_ON)
 		dc_sink_release(sink);
@@ -5451,10 +5448,13 @@ static void get_freesync_config_for_crtc(
 	struct mod_freesync_config config = {0};
 	struct amdgpu_dm_connector *aconnector =
 			to_amdgpu_dm_connector(new_con_state->base.connector);
+	struct drm_display_mode *mode = &new_crtc_state->base.mode;
 
-	new_crtc_state->vrr_supported = new_con_state->freesync_capable;
+	new_crtc_state->vrr_supported = new_con_state->freesync_capable &&
+		aconnector->min_vfreq <= drm_mode_vrefresh(mode);
 
-	if (new_con_state->freesync_capable) {
+	if (new_crtc_state->vrr_supported) {
+		new_crtc_state->stream->ignore_msa_timing_param = true;
 		config.state = new_crtc_state->base.vrr_enabled ?
 				VRR_STATE_ACTIVE_VARIABLE :
 				VRR_STATE_INACTIVE;
-- 
2.17.1