2 * Copyright (C) 2015 Texas Instruments
3 * Author: Jyri Sarha <jsarha@ti.com>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
11 #include <linux/component.h>
12 #include <linux/of_graph.h>
13 #include <drm/drm_of.h>
15 #include "tilcdc_drv.h"
16 #include "tilcdc_external.h"
18 static const struct tilcdc_panel_info panel_info_tda998x = {
31 static const struct tilcdc_panel_info panel_info_default = {
44 struct drm_connector *tilcdc_encoder_find_connector(struct drm_device *ddev,
45 struct drm_encoder *encoder)
47 struct drm_connector *connector;
50 list_for_each_entry(connector, &ddev->mode_config.connector_list, head)
51 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
52 if (connector->encoder_ids[i] == encoder->base.id)
55 dev_err(ddev->dev, "No connector found for %s encoder (id %d)\n",
56 encoder->name, encoder->base.id);
61 int tilcdc_add_component_encoder(struct drm_device *ddev)
63 struct tilcdc_drm_private *priv = ddev->dev_private;
64 struct drm_encoder *encoder = NULL, *iter;
66 list_for_each_entry(iter, &ddev->mode_config.encoder_list, head)
67 if (iter->possible_crtcs & (1 << priv->crtc->index)) {
73 dev_err(ddev->dev, "%s: No suitable encoder found\n", __func__);
77 priv->external_connector =
78 tilcdc_encoder_find_connector(ddev, encoder);
80 if (!priv->external_connector)
83 /* Only tda998x is supported at the moment. */
84 tilcdc_crtc_set_simulate_vesa_sync(priv->crtc, true);
85 tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_tda998x);
90 static const struct drm_encoder_funcs tilcdc_external_encoder_funcs = {
91 .destroy = drm_encoder_cleanup,
95 int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge)
97 struct tilcdc_drm_private *priv = ddev->dev_private;
100 priv->external_encoder->possible_crtcs = BIT(0);
102 ret = drm_bridge_attach(priv->external_encoder, bridge, NULL);
104 dev_err(ddev->dev, "drm_bridge_attach() failed %d\n", ret);
108 tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_default);
110 priv->external_connector =
111 tilcdc_encoder_find_connector(ddev, priv->external_encoder);
112 if (!priv->external_connector)
118 int tilcdc_attach_external_device(struct drm_device *ddev)
120 struct tilcdc_drm_private *priv = ddev->dev_private;
121 struct device_node *remote_node;
122 struct drm_bridge *bridge;
125 remote_node = of_graph_get_remote_node(ddev->dev->of_node, 0, 0);
129 bridge = of_drm_find_bridge(remote_node);
130 of_node_put(remote_node);
132 return -EPROBE_DEFER;
134 priv->external_encoder = devm_kzalloc(ddev->dev,
135 sizeof(*priv->external_encoder),
137 if (!priv->external_encoder)
140 ret = drm_encoder_init(ddev, priv->external_encoder,
141 &tilcdc_external_encoder_funcs,
142 DRM_MODE_ENCODER_NONE, NULL);
144 dev_err(ddev->dev, "drm_encoder_init() failed %d\n", ret);
148 ret = tilcdc_attach_bridge(ddev, bridge);
150 drm_encoder_cleanup(priv->external_encoder);
155 static int dev_match_of(struct device *dev, void *data)
157 return dev->of_node == data;
160 int tilcdc_get_external_components(struct device *dev,
161 struct component_match **match)
163 struct device_node *node;
165 node = of_graph_get_remote_node(dev->of_node, 0, 0);
167 if (!of_device_is_compatible(node, "nxp,tda998x")) {
173 drm_of_component_match_add(dev, match, dev_match_of, node);