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path: root/drivers/gpu/drm/mxsfb/mxsfb_out.c
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Diffstat (limited to 'drivers/gpu/drm/mxsfb/mxsfb_out.c')
-rw-r--r--drivers/gpu/drm/mxsfb/mxsfb_out.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_out.c b/drivers/gpu/drm/mxsfb/mxsfb_out.c
new file mode 100644
index 000000000000..fa8d17399407
--- /dev/null
+++ b/drivers/gpu/drm/mxsfb/mxsfb_out.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2016 Marek Vasut <marex@denx.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 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 <linux/of_graph.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <drm/drmP.h>
+
+#include "mxsfb_drv.h"
+
+static struct mxsfb_drm_private *
+drm_connector_to_mxsfb_drm_private(struct drm_connector *connector)
+{
+ return container_of(connector, struct mxsfb_drm_private, connector);
+}
+
+static int mxsfb_panel_get_modes(struct drm_connector *connector)
+{
+ struct mxsfb_drm_private *mxsfb =
+ drm_connector_to_mxsfb_drm_private(connector);
+
+ if (mxsfb->panel)
+ return mxsfb->panel->funcs->get_modes(mxsfb->panel);
+
+ return 0;
+}
+
+static const struct
+drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
+ .get_modes = mxsfb_panel_get_modes,
+};
+
+static enum drm_connector_status
+mxsfb_panel_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct mxsfb_drm_private *mxsfb =
+ drm_connector_to_mxsfb_drm_private(connector);
+
+ if (mxsfb->panel)
+ return connector_status_connected;
+
+ return connector_status_disconnected;
+}
+
+static void mxsfb_panel_connector_destroy(struct drm_connector *connector)
+{
+ struct mxsfb_drm_private *mxsfb =
+ drm_connector_to_mxsfb_drm_private(connector);
+
+ if (mxsfb->panel)
+ drm_panel_detach(mxsfb->panel);
+
+ drm_connector_unregister(connector);
+ drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .detect = mxsfb_panel_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = mxsfb_panel_connector_destroy,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int mxsfb_attach_endpoint(struct drm_device *drm,
+ const struct of_endpoint *ep)
+{
+ struct mxsfb_drm_private *mxsfb = drm->dev_private;
+ struct device_node *np;
+ struct drm_panel *panel;
+ int ret = -EPROBE_DEFER;
+
+ np = of_graph_get_remote_port_parent(ep->local_node);
+ panel = of_drm_find_panel(np);
+ of_node_put(np);
+
+ if (!panel)
+ return -EPROBE_DEFER;
+
+ mxsfb->connector.dpms = DRM_MODE_DPMS_OFF;
+ mxsfb->connector.polled = 0;
+ drm_connector_helper_add(&mxsfb->connector,
+ &mxsfb_panel_connector_helper_funcs);
+ ret = drm_connector_init(drm, &mxsfb->connector,
+ &mxsfb_panel_connector_funcs,
+ DRM_MODE_CONNECTOR_Unknown);
+ if (!ret)
+ mxsfb->panel = panel;
+
+ return ret;
+}
+
+int mxsfb_create_output(struct drm_device *drm)
+{
+ struct device_node *ep_np = NULL;
+ struct of_endpoint ep;
+ int ret;
+
+ for_each_endpoint_of_node(drm->dev->of_node, ep_np) {
+ ret = of_graph_parse_endpoint(ep_np, &ep);
+ if (!ret)
+ ret = mxsfb_attach_endpoint(drm, &ep);
+
+ if (ret) {
+ of_node_put(ep_np);
+ return ret;
+ }
+ }
+
+ return 0;
+}