2 * Copyright 2015 Freescale Semiconductor, Inc.
4 * Freescale DCU drm device driver
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/backlight.h>
13 #include <linux/of_graph.h>
16 #include <drm/drm_atomic_helper.h>
17 #include <drm/drm_crtc_helper.h>
18 #include <drm/drm_panel.h>
20 #include "fsl_dcu_drm_drv.h"
23 static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
25 drm_encoder_cleanup(encoder);
28 static const struct drm_encoder_funcs encoder_funcs = {
29 .destroy = fsl_dcu_drm_encoder_destroy,
32 int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
33 struct drm_crtc *crtc)
35 struct drm_encoder *encoder = &fsl_dev->encoder;
38 encoder->possible_crtcs = 1;
40 /* Use bypass mode for parallel RGB/LVDS encoder */
42 fsl_tcon_bypass_enable(fsl_dev->tcon);
44 ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
45 DRM_MODE_ENCODER_LVDS, NULL);
52 static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
54 struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
56 drm_connector_unregister(connector);
57 drm_panel_detach(fsl_con->panel);
58 drm_connector_cleanup(connector);
61 static enum drm_connector_status
62 fsl_dcu_drm_connector_detect(struct drm_connector *connector, bool force)
64 return connector_status_connected;
67 static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
68 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
69 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
70 .destroy = fsl_dcu_drm_connector_destroy,
71 .detect = fsl_dcu_drm_connector_detect,
72 .dpms = drm_atomic_helper_connector_dpms,
73 .fill_modes = drm_helper_probe_single_connector_modes,
74 .reset = drm_atomic_helper_connector_reset,
77 static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
79 struct fsl_dcu_drm_connector *fsl_connector;
80 int (*get_modes)(struct drm_panel *panel);
83 fsl_connector = to_fsl_dcu_connector(connector);
84 if (fsl_connector->panel && fsl_connector->panel->funcs &&
85 fsl_connector->panel->funcs->get_modes) {
86 get_modes = fsl_connector->panel->funcs->get_modes;
87 num_modes = get_modes(fsl_connector->panel);
93 static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
94 struct drm_display_mode *mode)
96 if (mode->hdisplay & 0xf)
102 static const struct drm_connector_helper_funcs connector_helper_funcs = {
103 .get_modes = fsl_dcu_drm_connector_get_modes,
104 .mode_valid = fsl_dcu_drm_connector_mode_valid,
107 static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
108 struct drm_panel *panel)
110 struct drm_encoder *encoder = &fsl_dev->encoder;
111 struct drm_connector *connector = &fsl_dev->connector.base;
112 struct drm_mode_config *mode_config = &fsl_dev->drm->mode_config;
115 fsl_dev->connector.encoder = encoder;
117 ret = drm_connector_init(fsl_dev->drm, connector,
118 &fsl_dcu_drm_connector_funcs,
119 DRM_MODE_CONNECTOR_LVDS);
123 drm_connector_helper_add(connector, &connector_helper_funcs);
124 ret = drm_connector_register(connector);
128 ret = drm_mode_connector_attach_encoder(connector, encoder);
132 drm_object_property_set_value(&connector->base,
133 mode_config->dpms_property,
136 ret = drm_panel_attach(panel, connector);
138 dev_err(fsl_dev->dev, "failed to attach panel\n");
145 drm_connector_unregister(connector);
147 drm_connector_cleanup(connector);
151 static int fsl_dcu_attach_endpoint(struct fsl_dcu_drm_device *fsl_dev,
152 const struct of_endpoint *ep)
154 struct drm_bridge *bridge;
155 struct device_node *np;
157 np = of_graph_get_remote_port_parent(ep->local_node);
159 fsl_dev->connector.panel = of_drm_find_panel(np);
160 if (fsl_dev->connector.panel) {
162 return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
165 bridge = of_drm_find_bridge(np);
170 fsl_dev->encoder.bridge = bridge;
171 bridge->encoder = &fsl_dev->encoder;
173 return drm_bridge_attach(fsl_dev->drm, bridge);
176 int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
178 struct of_endpoint ep;
179 struct device_node *ep_node, *panel_node;
182 /* This is for backward compatibility */
183 panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
185 fsl_dev->connector.panel = of_drm_find_panel(panel_node);
186 of_node_put(panel_node);
187 if (!fsl_dev->connector.panel)
188 return -EPROBE_DEFER;
189 return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
192 ep_node = of_graph_get_next_endpoint(fsl_dev->np, NULL);
196 ret = of_graph_parse_endpoint(ep_node, &ep);
197 of_node_put(ep_node);
201 return fsl_dcu_attach_endpoint(fsl_dev, &ep);