disp: msm: sde: add changes to fix get connector failure in rm_release

Currently during rm_release, drm_conn is available only if connector
and encoder are bound together. If a test_only commit occurs
before a non-blocking modeset commit, this bound is uncertain.
The resources allocated by test_only commit will not be released
and leads to resource allocation failures for the consequent
commits. Add changes to modify this by checking for the encoder
attached to sde_connector which happens during bootup.

Change-Id: Icb1d9595efda8a104ba527175b2dbc6a2c856d44
Signed-off-by: Jayaprakash <jmadiset@codeaurora.org>

msm/sde/sde_rm.c

@@ -2074,11 +2074,13 @@ static struct drm_connector *_sde_rm_get_connector(
 		struct drm_encoder *enc)
 {
 	struct drm_connector *conn = NULL, *conn_search;
+	struct sde_connector *c_conn = NULL;
 	struct drm_connector_list_iter conn_iter;
 
 	drm_connector_list_iter_begin(enc->dev, &conn_iter);
 	drm_for_each_connector_iter(conn_search, &conn_iter) {
-		if (conn_search->encoder == enc) {
+		c_conn = to_sde_connector(conn_search);
+		if (c_conn->encoder == enc) {
 			conn = conn_search;
 			break;
 		}
@@ -2229,10 +2231,10 @@ void sde_rm_release(struct sde_rm *rm, struct drm_encoder *enc, bool nxt)
 
 	conn = _sde_rm_get_connector(enc);
 	if (!conn) {
-		SDE_DEBUG("failed to get connector for enc %d, nxt %d",
-				enc->base.id, nxt);
 		SDE_EVT32(enc->base.id, 0x0, 0xffffffff);
 		_sde_rm_release_rsvp(rm, rsvp, conn);
+		SDE_DEBUG("failed to get conn for enc %d nxt %d rsvp[s%de%d]\n",
+				enc->base.id, nxt, rsvp->seq, rsvp->enc_id);
 		goto end;
 	}