disp: msm: sde: add xin client clock status for wb2

CWB may trigger frame missed message if interrupts
are disabled on specific CPU. WB2 will only find single
interrupt status for two posted start triggered frame.
SDE driver will start checking the xin client clock
status for wb2 timeout case to trigger the valid
frame done status.

Change-Id: I16a99667116732002e6dec8a18330f8b45199387
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>

msm/sde/sde_vbif.c

@@ -406,6 +406,58 @@ bool sde_vbif_set_xin_halt(struct sde_kms *sde_kms,
 	return forced_on;
 }
 
+bool sde_vbif_get_xin_status(struct sde_kms *sde_kms,
+		struct sde_vbif_get_xin_status_params *params)
+{
+	struct sde_hw_vbif *vbif = NULL;
+	struct sde_hw_mdp *mdp;
+	int i, rc;
+	bool status;
+
+	if (!sde_kms || !params) {
+		SDE_ERROR("invalid arguments\n");
+		return false;
+	}
+
+	if (!sde_kms_is_vbif_operation_allowed(sde_kms)) {
+		SDE_DEBUG("vbif operations not permitted\n");
+		return true;
+	}
+
+	mdp = sde_kms->hw_mdp;
+
+	for (i = 0; i < ARRAY_SIZE(sde_kms->hw_vbif); i++) {
+		if (sde_kms->hw_vbif[i] &&
+				sde_kms->hw_vbif[i]->idx == params->vbif_idx) {
+			vbif = sde_kms->hw_vbif[i];
+			break;
+		}
+	}
+
+	if (!vbif || !mdp) {
+		SDE_DEBUG("invalid arguments vbif:%d mdp:%d vbif idx:%d\n",
+				vbif != NULL, mdp != NULL, params->vbif_idx);
+		return false;
+	}
+
+	if (!mdp->ops.get_clk_ctrl_status ||
+			!vbif->ops.get_xin_halt_status)
+		return false;
+
+	mutex_lock(&vbif->mutex);
+	SDE_EVT32_VERBOSE(vbif->idx, params->xin_id);
+	status = vbif->ops.get_xin_halt_status(vbif, params->xin_id);
+	if (status) {
+		rc = !mdp->ops.get_clk_ctrl_status(mdp, params->clk_ctrl,
+				&status);
+		if (rc)
+			status = false;
+	}
+	mutex_unlock(&vbif->mutex);
+
+	return status;
+}
+
 void sde_vbif_set_qos_remap(struct sde_kms *sde_kms,
 		struct sde_vbif_set_qos_params *params)
 {