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_of.h>
19 #include <drm/drm_panel.h>
21 #include "fsl_dcu_drm_drv.h"
24 static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
26 drm_encoder_cleanup(encoder);
29 static const struct drm_encoder_funcs encoder_funcs = {
30 .destroy = fsl_dcu_drm_encoder_destroy,
33 int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
34 struct drm_crtc *crtc)
36 struct drm_encoder *encoder = &fsl_dev->encoder;
39 encoder->possible_crtcs = 1;
41 /* Use bypass mode for parallel RGB/LVDS encoder */
43 fsl_tcon_bypass_enable(fsl_dev->tcon);
45 ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
46 DRM_MODE_ENCODER_LVDS, NULL);
53 static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
55 struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
57 drm_connector_unregister(connector);
58 drm_panel_detach(fsl_con->panel);
59 drm_connector_cleanup(connector);
62 static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
63 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
64 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
65 .destroy = fsl_dcu_drm_connector_destroy,
66 .fill_modes = drm_helper_probe_single_connector_modes,
67 .reset = drm_atomic_helper_connector_reset,
70 static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
72 struct fsl_dcu_drm_connector *fsl_connector;
73 int (*get_modes)(struct drm_panel *panel);
76 fsl_connector = to_fsl_dcu_connector(connector);
77 if (fsl_connector->panel && fsl_connector->panel->funcs &&
78 fsl_connector->panel->funcs->get_modes) {
79 get_modes = fsl_connector->panel->funcs->get_modes;
80 num_modes = get_modes(fsl_connector->panel);
86 static enum drm_mode_status
87 fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
88 struct drm_display_mode *mode)
90 if (mode->hdisplay & 0xf)
96 static const struct drm_connector_helper_funcs connector_helper_funcs = {
97 .get_modes = fsl_dcu_drm_connector_get_modes,
98 .mode_valid = fsl_dcu_drm_connector_mode_valid,
101 static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
102 struct drm_panel *panel)
104 struct drm_encoder *encoder = &fsl_dev->encoder;
105 struct drm_connector *connector = &fsl_dev->connector.base;
108 fsl_dev->connector.encoder = encoder;
110 ret = drm_connector_init(fsl_dev->drm, connector,
111 &fsl_dcu_drm_connector_funcs,
112 DRM_MODE_CONNECTOR_LVDS);
116 drm_connector_helper_add(connector, &connector_helper_funcs);
117 ret = drm_connector_register(connector);
121 ret = drm_mode_connector_attach_encoder(connector, encoder);
125 ret = drm_panel_attach(panel, connector);
127 dev_err(fsl_dev->dev, "failed to attach panel\n");
134 drm_connector_unregister(connector);
136 drm_connector_cleanup(connector);
140 int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
142 struct device_node *panel_node;
143 struct drm_panel *panel;
144 struct drm_bridge *bridge;
147 /* This is for backward compatibility */
148 panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
150 fsl_dev->connector.panel = of_drm_find_panel(panel_node);
151 of_node_put(panel_node);
152 if (!fsl_dev->connector.panel)
153 return -EPROBE_DEFER;
154 return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
157 ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
162 fsl_dev->connector.panel = panel;
163 return fsl_dcu_attach_panel(fsl_dev, panel);
166 return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL);