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1/*
2 * Copyright 2015 Freescale Semiconductor, Inc.
3 *
4 * Freescale DCU drm device driver
5 *
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.
10 */
11
12#include <linux/backlight.h>
13
14#include <drm/drmP.h>
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_crtc_helper.h>
17#include <drm/drm_panel.h>
18
19#include "fsl_dcu_drm_drv.h"
20
21static int
22fsl_dcu_drm_encoder_atomic_check(struct drm_encoder *encoder,
23 struct drm_crtc_state *crtc_state,
24 struct drm_connector_state *conn_state)
25{
26 return 0;
27}
28
29static void fsl_dcu_drm_encoder_disable(struct drm_encoder *encoder)
30{
31}
32
33static void fsl_dcu_drm_encoder_enable(struct drm_encoder *encoder)
34{
35}
36
37static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
38 .atomic_check = fsl_dcu_drm_encoder_atomic_check,
39 .disable = fsl_dcu_drm_encoder_disable,
40 .enable = fsl_dcu_drm_encoder_enable,
41};
42
43static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
44{
45 drm_encoder_cleanup(encoder);
46}
47
48static const struct drm_encoder_funcs encoder_funcs = {
49 .destroy = fsl_dcu_drm_encoder_destroy,
50};
51
52int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
53 struct drm_crtc *crtc)
54{
55 struct drm_encoder *encoder = &fsl_dev->encoder;
56 int ret;
57
58 encoder->possible_crtcs = 1;
59 ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
60 DRM_MODE_ENCODER_LVDS, NULL);
61 if (ret < 0)
62 return ret;
63
64 drm_encoder_helper_add(encoder, &encoder_helper_funcs);
65
66 return 0;
67}
68
69static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
70{
71 drm_connector_unregister(connector);
72 drm_connector_cleanup(connector);
73}
74
75static enum drm_connector_status
76fsl_dcu_drm_connector_detect(struct drm_connector *connector, bool force)
77{
78 return connector_status_connected;
79}
80
81static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
82 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
83 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
84 .destroy = fsl_dcu_drm_connector_destroy,
85 .detect = fsl_dcu_drm_connector_detect,
86 .dpms = drm_atomic_helper_connector_dpms,
87 .fill_modes = drm_helper_probe_single_connector_modes,
88 .reset = drm_atomic_helper_connector_reset,
89};
90
91static struct drm_encoder *
92fsl_dcu_drm_connector_best_encoder(struct drm_connector *connector)
93{
94 struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
95
96 return fsl_con->encoder;
97}
98
99static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
100{
101 struct fsl_dcu_drm_connector *fsl_connector;
102 int (*get_modes)(struct drm_panel *panel);
103 int num_modes = 0;
104
105 fsl_connector = to_fsl_dcu_connector(connector);
106 if (fsl_connector->panel && fsl_connector->panel->funcs &&
107 fsl_connector->panel->funcs->get_modes) {
108 get_modes = fsl_connector->panel->funcs->get_modes;
109 num_modes = get_modes(fsl_connector->panel);
110 }
111
112 return num_modes;
113}
114
115static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
116 struct drm_display_mode *mode)
117{
118 if (mode->hdisplay & 0xf)
119 return MODE_ERROR;
120
121 return MODE_OK;
122}
123
124static const struct drm_connector_helper_funcs connector_helper_funcs = {
125 .best_encoder = fsl_dcu_drm_connector_best_encoder,
126 .get_modes = fsl_dcu_drm_connector_get_modes,
127 .mode_valid = fsl_dcu_drm_connector_mode_valid,
128};
129
130int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
131 struct drm_encoder *encoder)
132{
133 struct drm_connector *connector = &fsl_dev->connector.base;
134 struct drm_mode_config mode_config = fsl_dev->drm->mode_config;
135 struct device_node *panel_node;
136 int ret;
137
138 fsl_dev->connector.encoder = encoder;
139
140 ret = drm_connector_init(fsl_dev->drm, connector,
141 &fsl_dcu_drm_connector_funcs,
142 DRM_MODE_CONNECTOR_LVDS);
143 if (ret < 0)
144 return ret;
145
146 drm_connector_helper_add(connector, &connector_helper_funcs);
147 ret = drm_connector_register(connector);
148 if (ret < 0)
149 goto err_cleanup;
150
151 ret = drm_mode_connector_attach_encoder(connector, encoder);
152 if (ret < 0)
153 goto err_sysfs;
154
155 drm_object_property_set_value(&connector->base,
156 mode_config.dpms_property,
157 DRM_MODE_DPMS_OFF);
158
159 panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
160 if (panel_node) {
161 fsl_dev->connector.panel = of_drm_find_panel(panel_node);
162 if (!fsl_dev->connector.panel) {
163 ret = -EPROBE_DEFER;
164 goto err_sysfs;
165 }
166 of_node_put(panel_node);
167 }
168
169 ret = drm_panel_attach(fsl_dev->connector.panel, connector);
170 if (ret) {
171 dev_err(fsl_dev->dev, "failed to attach panel\n");
172 goto err_sysfs;
173 }
174
175 return 0;
176
177err_sysfs:
178 drm_connector_unregister(connector);
179err_cleanup:
180 drm_connector_cleanup(connector);
181 return ret;
182}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 2015 Freescale Semiconductor, Inc.
4 *
5 * Freescale DCU drm device driver
6 */
7
8#include <linux/backlight.h>
9#include <linux/of_graph.h>
10
11#include <drm/drm_atomic_helper.h>
12#include <drm/drm_bridge.h>
13#include <drm/drm_of.h>
14#include <drm/drm_panel.h>
15#include <drm/drm_probe_helper.h>
16#include <drm/drm_simple_kms_helper.h>
17
18#include "fsl_dcu_drm_drv.h"
19#include "fsl_tcon.h"
20
21int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
22 struct drm_crtc *crtc)
23{
24 struct drm_encoder *encoder = &fsl_dev->encoder;
25 int ret;
26
27 encoder->possible_crtcs = 1;
28
29 /* Use bypass mode for parallel RGB/LVDS encoder */
30 if (fsl_dev->tcon)
31 fsl_tcon_bypass_enable(fsl_dev->tcon);
32
33 ret = drm_simple_encoder_init(fsl_dev->drm, encoder,
34 DRM_MODE_ENCODER_LVDS);
35 if (ret < 0)
36 return ret;
37
38 return 0;
39}
40
41static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
42{
43 drm_connector_unregister(connector);
44 drm_connector_cleanup(connector);
45}
46
47static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
48 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
49 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
50 .destroy = fsl_dcu_drm_connector_destroy,
51 .fill_modes = drm_helper_probe_single_connector_modes,
52 .reset = drm_atomic_helper_connector_reset,
53};
54
55static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
56{
57 struct fsl_dcu_drm_connector *fsl_connector;
58
59 fsl_connector = to_fsl_dcu_connector(connector);
60 return drm_panel_get_modes(fsl_connector->panel, connector);
61}
62
63static enum drm_mode_status
64fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
65 struct drm_display_mode *mode)
66{
67 if (mode->hdisplay & 0xf)
68 return MODE_ERROR;
69
70 return MODE_OK;
71}
72
73static const struct drm_connector_helper_funcs connector_helper_funcs = {
74 .get_modes = fsl_dcu_drm_connector_get_modes,
75 .mode_valid = fsl_dcu_drm_connector_mode_valid,
76};
77
78static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
79 struct drm_panel *panel)
80{
81 struct drm_encoder *encoder = &fsl_dev->encoder;
82 struct drm_connector *connector = &fsl_dev->connector.base;
83 int ret;
84
85 fsl_dev->connector.encoder = encoder;
86
87 ret = drm_connector_init(fsl_dev->drm, connector,
88 &fsl_dcu_drm_connector_funcs,
89 DRM_MODE_CONNECTOR_LVDS);
90 if (ret < 0)
91 return ret;
92
93 drm_connector_helper_add(connector, &connector_helper_funcs);
94 ret = drm_connector_register(connector);
95 if (ret < 0)
96 goto err_cleanup;
97
98 ret = drm_connector_attach_encoder(connector, encoder);
99 if (ret < 0)
100 goto err_sysfs;
101
102 return 0;
103
104err_sysfs:
105 drm_connector_unregister(connector);
106err_cleanup:
107 drm_connector_cleanup(connector);
108 return ret;
109}
110
111int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
112{
113 struct device_node *panel_node;
114 struct drm_panel *panel;
115 struct drm_bridge *bridge;
116 int ret;
117
118 /* This is for backward compatibility */
119 panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
120 if (panel_node) {
121 fsl_dev->connector.panel = of_drm_find_panel(panel_node);
122 of_node_put(panel_node);
123 if (IS_ERR(fsl_dev->connector.panel))
124 return PTR_ERR(fsl_dev->connector.panel);
125
126 return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
127 }
128
129 ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
130 if (ret)
131 return ret;
132
133 if (panel) {
134 fsl_dev->connector.panel = panel;
135 return fsl_dcu_attach_panel(fsl_dev, panel);
136 }
137
138 return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL, 0);
139}