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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_of.h>
13#include <drm/drm_panel.h>
14#include <drm/drm_probe_helper.h>
15
16#include "fsl_dcu_drm_drv.h"
17#include "fsl_tcon.h"
18
19static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
20{
21 drm_encoder_cleanup(encoder);
22}
23
24static const struct drm_encoder_funcs encoder_funcs = {
25 .destroy = fsl_dcu_drm_encoder_destroy,
26};
27
28int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
29 struct drm_crtc *crtc)
30{
31 struct drm_encoder *encoder = &fsl_dev->encoder;
32 int ret;
33
34 encoder->possible_crtcs = 1;
35
36 /* Use bypass mode for parallel RGB/LVDS encoder */
37 if (fsl_dev->tcon)
38 fsl_tcon_bypass_enable(fsl_dev->tcon);
39
40 ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
41 DRM_MODE_ENCODER_LVDS, NULL);
42 if (ret < 0)
43 return ret;
44
45 return 0;
46}
47
48static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
49{
50 struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
51
52 drm_connector_unregister(connector);
53 drm_panel_detach(fsl_con->panel);
54 drm_connector_cleanup(connector);
55}
56
57static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
58 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
59 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
60 .destroy = fsl_dcu_drm_connector_destroy,
61 .fill_modes = drm_helper_probe_single_connector_modes,
62 .reset = drm_atomic_helper_connector_reset,
63};
64
65static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
66{
67 struct fsl_dcu_drm_connector *fsl_connector;
68
69 fsl_connector = to_fsl_dcu_connector(connector);
70 return drm_panel_get_modes(fsl_connector->panel);
71}
72
73static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
74 struct drm_display_mode *mode)
75{
76 if (mode->hdisplay & 0xf)
77 return MODE_ERROR;
78
79 return MODE_OK;
80}
81
82static const struct drm_connector_helper_funcs connector_helper_funcs = {
83 .get_modes = fsl_dcu_drm_connector_get_modes,
84 .mode_valid = fsl_dcu_drm_connector_mode_valid,
85};
86
87static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
88 struct drm_panel *panel)
89{
90 struct drm_encoder *encoder = &fsl_dev->encoder;
91 struct drm_connector *connector = &fsl_dev->connector.base;
92 int ret;
93
94 fsl_dev->connector.encoder = encoder;
95
96 ret = drm_connector_init(fsl_dev->drm, connector,
97 &fsl_dcu_drm_connector_funcs,
98 DRM_MODE_CONNECTOR_LVDS);
99 if (ret < 0)
100 return ret;
101
102 drm_connector_helper_add(connector, &connector_helper_funcs);
103 ret = drm_connector_register(connector);
104 if (ret < 0)
105 goto err_cleanup;
106
107 ret = drm_connector_attach_encoder(connector, encoder);
108 if (ret < 0)
109 goto err_sysfs;
110
111 ret = drm_panel_attach(panel, connector);
112 if (ret) {
113 dev_err(fsl_dev->dev, "failed to attach panel\n");
114 goto err_sysfs;
115 }
116
117 return 0;
118
119err_sysfs:
120 drm_connector_unregister(connector);
121err_cleanup:
122 drm_connector_cleanup(connector);
123 return ret;
124}
125
126int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
127{
128 struct device_node *panel_node;
129 struct drm_panel *panel;
130 struct drm_bridge *bridge;
131 int ret;
132
133 /* This is for backward compatibility */
134 panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
135 if (panel_node) {
136 fsl_dev->connector.panel = of_drm_find_panel(panel_node);
137 of_node_put(panel_node);
138 if (IS_ERR(fsl_dev->connector.panel))
139 return PTR_ERR(fsl_dev->connector.panel);
140
141 return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
142 }
143
144 ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
145 if (ret)
146 return ret;
147
148 if (panel) {
149 fsl_dev->connector.panel = panel;
150 return fsl_dcu_attach_panel(fsl_dev, panel);
151 }
152
153 return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL);
154}