[PATCH 14/39] drm/amd/display: Reset VRR config during resume

[Rodrigo Siqueira]

From: Tom Chung <chiahsuan.chung at amd.com>

[Why]
After resume the system, the new_crtc_state->vrr_infopacket does not
synchronize with the current state.  It will affect the
update_freesync_state_on_stream() does not update the state correctly.

The previous patch causes a PSR SU regression that cannot let panel go
into self-refresh mode.

[How]
Reset the VRR config during resume to force update the VRR config later.

Fixes: f8ebe6341a6a ("drm/amd/display: Reset freesync config before update new state")
Signed-off-by: Tom Chung <chiahsuan.chung at amd.com>
Reviewed-by: Sun peng Li <sunpeng.li at amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.siqueira at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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 f2d5a180f293..293f93d1976c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -176,6 +176,7 @@ MODULE_FIRMWARE(FIRMWARE_DCN_401_DMUB);
 static int amdgpu_dm_init(struct amdgpu_device *adev);
 static void amdgpu_dm_fini(struct amdgpu_device *adev);
 static bool is_freesync_video_mode(const struct drm_display_mode *mode, struct amdgpu_dm_connector *aconnector);
+static void reset_freesync_config_for_crtc(struct dm_crtc_state *new_crtc_state);
 
 static enum drm_mode_subconnector get_subconnector_type(struct dc_link *link)
 {
@@ -3213,8 +3214,11 @@ static int dm_resume(void *handle)
 	drm_connector_list_iter_end(&iter);
 
 	/* Force mode set in atomic commit */
-	for_each_new_crtc_in_state(dm->cached_state, crtc, new_crtc_state, i)
+	for_each_new_crtc_in_state(dm->cached_state, crtc, new_crtc_state, i) {
 		new_crtc_state->active_changed = true;
+		dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
+		reset_freesync_config_for_crtc(dm_new_crtc_state);
+	}
 
 	/*
 	 * atomic_check is expected to create the dc states. We need to release
-- 
2.43.0