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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/*
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#include <linux/of_graph.h>
14
15#include <drm/drmP.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>
20
21#include "fsl_dcu_drm_drv.h"
22#include "fsl_tcon.h"
23
24static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
25{
26 drm_encoder_cleanup(encoder);
27}
28
29static const struct drm_encoder_funcs encoder_funcs = {
30 .destroy = fsl_dcu_drm_encoder_destroy,
31};
32
33int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
34 struct drm_crtc *crtc)
35{
36 struct drm_encoder *encoder = &fsl_dev->encoder;
37 int ret;
38
39 encoder->possible_crtcs = 1;
40
41 /* Use bypass mode for parallel RGB/LVDS encoder */
42 if (fsl_dev->tcon)
43 fsl_tcon_bypass_enable(fsl_dev->tcon);
44
45 ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
46 DRM_MODE_ENCODER_LVDS, NULL);
47 if (ret < 0)
48 return ret;
49
50 return 0;
51}
52
53static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
54{
55 struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
56
57 drm_connector_unregister(connector);
58 drm_panel_detach(fsl_con->panel);
59 drm_connector_cleanup(connector);
60}
61
62static 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,
68};
69
70static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
71{
72 struct fsl_dcu_drm_connector *fsl_connector;
73 int (*get_modes)(struct drm_panel *panel);
74 int num_modes = 0;
75
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);
81 }
82
83 return num_modes;
84}
85
86static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
87 struct drm_display_mode *mode)
88{
89 if (mode->hdisplay & 0xf)
90 return MODE_ERROR;
91
92 return MODE_OK;
93}
94
95static const struct drm_connector_helper_funcs connector_helper_funcs = {
96 .get_modes = fsl_dcu_drm_connector_get_modes,
97 .mode_valid = fsl_dcu_drm_connector_mode_valid,
98};
99
100static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
101 struct drm_panel *panel)
102{
103 struct drm_encoder *encoder = &fsl_dev->encoder;
104 struct drm_connector *connector = &fsl_dev->connector.base;
105 int ret;
106
107 fsl_dev->connector.encoder = encoder;
108
109 ret = drm_connector_init(fsl_dev->drm, connector,
110 &fsl_dcu_drm_connector_funcs,
111 DRM_MODE_CONNECTOR_LVDS);
112 if (ret < 0)
113 return ret;
114
115 drm_connector_helper_add(connector, &connector_helper_funcs);
116 ret = drm_connector_register(connector);
117 if (ret < 0)
118 goto err_cleanup;
119
120 ret = drm_mode_connector_attach_encoder(connector, encoder);
121 if (ret < 0)
122 goto err_sysfs;
123
124 ret = drm_panel_attach(panel, connector);
125 if (ret) {
126 dev_err(fsl_dev->dev, "failed to attach panel\n");
127 goto err_sysfs;
128 }
129
130 return 0;
131
132err_sysfs:
133 drm_connector_unregister(connector);
134err_cleanup:
135 drm_connector_cleanup(connector);
136 return ret;
137}
138
139int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
140{
141 struct device_node *panel_node;
142 struct drm_panel *panel;
143 struct drm_bridge *bridge;
144 int ret;
145
146 /* This is for backward compatibility */
147 panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
148 if (panel_node) {
149 fsl_dev->connector.panel = of_drm_find_panel(panel_node);
150 of_node_put(panel_node);
151 if (!fsl_dev->connector.panel)
152 return -EPROBE_DEFER;
153 return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
154 }
155
156 ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
157 if (ret)
158 return ret;
159
160 if (panel) {
161 fsl_dev->connector.panel = panel;
162 return fsl_dcu_attach_panel(fsl_dev, panel);
163 }
164
165 return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL);
166}