Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 120 insertions, 0 deletions

diff --git a/kernel/drivers/gpu/drm/msm/edp/edp_bridge.c b/kernel/drivers/gpu/drm/msm/edp/edp_bridge.c
new file mode 100644
index 000000000..2bc73f82f
--- /dev/null
+++ b/kernel/drivers/gpu/drm/msm/edp/edp_bridge.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "edp.h"
+
+struct edp_bridge {
+	struct drm_bridge base;
+	struct msm_edp *edp;
+};
+#define to_edp_bridge(x) container_of(x, struct edp_bridge, base)
+
+void edp_bridge_destroy(struct drm_bridge *bridge)
+{
+}
+
+static void edp_bridge_pre_enable(struct drm_bridge *bridge)
+{
+	struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
+	struct msm_edp *edp = edp_bridge->edp;
+
+	DBG("");
+	msm_edp_ctrl_power(edp->ctrl, true);
+}
+
+static void edp_bridge_enable(struct drm_bridge *bridge)
+{
+	DBG("");
+}
+
+static void edp_bridge_disable(struct drm_bridge *bridge)
+{
+	DBG("");
+}
+
+static void edp_bridge_post_disable(struct drm_bridge *bridge)
+{
+	struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
+	struct msm_edp *edp = edp_bridge->edp;
+
+	DBG("");
+	msm_edp_ctrl_power(edp->ctrl, false);
+}
+
+static void edp_bridge_mode_set(struct drm_bridge *bridge,
+		struct drm_display_mode *mode,
+		struct drm_display_mode *adjusted_mode)
+{
+	struct drm_device *dev = bridge->dev;
+	struct drm_connector *connector;
+	struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
+	struct msm_edp *edp = edp_bridge->edp;
+
+	DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
+			mode->base.id, mode->name,
+			mode->vrefresh, mode->clock,
+			mode->hdisplay, mode->hsync_start,
+			mode->hsync_end, mode->htotal,
+			mode->vdisplay, mode->vsync_start,
+			mode->vsync_end, mode->vtotal,
+			mode->type, mode->flags);
+
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		if ((connector->encoder != NULL) &&
+			(connector->encoder->bridge == bridge)) {
+			msm_edp_ctrl_timing_cfg(edp->ctrl,
+				adjusted_mode, &connector->display_info);
+			break;
+		}
+	}
+}
+
+static const struct drm_bridge_funcs edp_bridge_funcs = {
+	.pre_enable = edp_bridge_pre_enable,
+	.enable = edp_bridge_enable,
+	.disable = edp_bridge_disable,
+	.post_disable = edp_bridge_post_disable,
+	.mode_set = edp_bridge_mode_set,
+};
+
+/* initialize bridge */
+struct drm_bridge *msm_edp_bridge_init(struct msm_edp *edp)
+{
+	struct drm_bridge *bridge = NULL;
+	struct edp_bridge *edp_bridge;
+	int ret;
+
+	edp_bridge = devm_kzalloc(edp->dev->dev,
+			sizeof(*edp_bridge), GFP_KERNEL);
+	if (!edp_bridge) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	edp_bridge->edp = edp;
+
+	bridge = &edp_bridge->base;
+	bridge->funcs = &edp_bridge_funcs;
+
+	ret = drm_bridge_attach(edp->dev, bridge);
+	if (ret)
+		goto fail;
+
+	return bridge;
+
+fail:
+	if (bridge)
+		edp_bridge_destroy(bridge);
+
+	return ERR_PTR(ret);
+}