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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Exynos DRM Parallel output support.
4 *
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd
6 *
7 * Contacts: Andrzej Hajda <a.hajda@samsung.com>
8*/
9
10#include <linux/of.h>
11#include <linux/of_graph.h>
12#include <linux/regulator/consumer.h>
13
14#include <drm/drm_atomic_helper.h>
15#include <drm/drm_panel.h>
16#include <drm/drm_print.h>
17#include <drm/drm_probe_helper.h>
18#include <drm/drm_simple_kms_helper.h>
19
20#include <video/of_videomode.h>
21#include <video/videomode.h>
22
23#include "exynos_drm_crtc.h"
24
25struct exynos_dpi {
26 struct drm_encoder encoder;
27 struct device *dev;
28 struct device_node *panel_node;
29
30 struct drm_panel *panel;
31 struct drm_connector connector;
32
33 struct videomode *vm;
34};
35
36#define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector)
37
38static inline struct exynos_dpi *encoder_to_dpi(struct drm_encoder *e)
39{
40 return container_of(e, struct exynos_dpi, encoder);
41}
42
43static enum drm_connector_status
44exynos_dpi_detect(struct drm_connector *connector, bool force)
45{
46 return connector_status_connected;
47}
48
49static void exynos_dpi_connector_destroy(struct drm_connector *connector)
50{
51 drm_connector_unregister(connector);
52 drm_connector_cleanup(connector);
53}
54
55static const struct drm_connector_funcs exynos_dpi_connector_funcs = {
56 .detect = exynos_dpi_detect,
57 .fill_modes = drm_helper_probe_single_connector_modes,
58 .destroy = exynos_dpi_connector_destroy,
59 .reset = drm_atomic_helper_connector_reset,
60 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
61 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
62};
63
64static int exynos_dpi_get_modes(struct drm_connector *connector)
65{
66 struct exynos_dpi *ctx = connector_to_dpi(connector);
67
68 /* fimd timings gets precedence over panel modes */
69 if (ctx->vm) {
70 struct drm_display_mode *mode;
71
72 mode = drm_mode_create(connector->dev);
73 if (!mode) {
74 DRM_DEV_ERROR(ctx->dev,
75 "failed to create a new display mode\n");
76 return 0;
77 }
78 drm_display_mode_from_videomode(ctx->vm, mode);
79 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
80 drm_mode_probed_add(connector, mode);
81 return 1;
82 }
83
84 if (ctx->panel)
85 return drm_panel_get_modes(ctx->panel, connector);
86
87 return 0;
88}
89
90static const struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = {
91 .get_modes = exynos_dpi_get_modes,
92};
93
94static int exynos_dpi_create_connector(struct drm_encoder *encoder)
95{
96 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
97 struct drm_connector *connector = &ctx->connector;
98 int ret;
99
100 connector->polled = DRM_CONNECTOR_POLL_HPD;
101
102 ret = drm_connector_init(encoder->dev, connector,
103 &exynos_dpi_connector_funcs,
104 DRM_MODE_CONNECTOR_DPI);
105 if (ret) {
106 DRM_DEV_ERROR(ctx->dev,
107 "failed to initialize connector with drm\n");
108 return ret;
109 }
110
111 drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs);
112 drm_connector_attach_encoder(connector, encoder);
113
114 return 0;
115}
116
117static void exynos_dpi_mode_set(struct drm_encoder *encoder,
118 struct drm_display_mode *mode,
119 struct drm_display_mode *adjusted_mode)
120{
121}
122
123static void exynos_dpi_enable(struct drm_encoder *encoder)
124{
125 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
126
127 if (ctx->panel) {
128 drm_panel_prepare(ctx->panel);
129 drm_panel_enable(ctx->panel);
130 }
131}
132
133static void exynos_dpi_disable(struct drm_encoder *encoder)
134{
135 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
136
137 if (ctx->panel) {
138 drm_panel_disable(ctx->panel);
139 drm_panel_unprepare(ctx->panel);
140 }
141}
142
143static const struct drm_encoder_helper_funcs exynos_dpi_encoder_helper_funcs = {
144 .mode_set = exynos_dpi_mode_set,
145 .enable = exynos_dpi_enable,
146 .disable = exynos_dpi_disable,
147};
148
149enum {
150 FIMD_PORT_IN0,
151 FIMD_PORT_IN1,
152 FIMD_PORT_IN2,
153 FIMD_PORT_RGB,
154 FIMD_PORT_WRB,
155};
156
157static int exynos_dpi_parse_dt(struct exynos_dpi *ctx)
158{
159 struct device *dev = ctx->dev;
160 struct device_node *dn = dev->of_node;
161 struct device_node *np;
162
163 ctx->panel_node = of_graph_get_remote_node(dn, FIMD_PORT_RGB, 0);
164
165 np = of_get_child_by_name(dn, "display-timings");
166 if (np) {
167 struct videomode *vm;
168 int ret;
169
170 of_node_put(np);
171
172 vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL);
173 if (!vm)
174 return -ENOMEM;
175
176 ret = of_get_videomode(dn, vm, 0);
177 if (ret < 0) {
178 devm_kfree(dev, vm);
179 return ret;
180 }
181
182 ctx->vm = vm;
183
184 return 0;
185 }
186
187 if (!ctx->panel_node)
188 return -EINVAL;
189
190 return 0;
191}
192
193int exynos_dpi_bind(struct drm_device *dev, struct drm_encoder *encoder)
194{
195 int ret;
196
197 drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_TMDS);
198
199 drm_encoder_helper_add(encoder, &exynos_dpi_encoder_helper_funcs);
200
201 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
202 if (ret < 0)
203 return ret;
204
205 ret = exynos_dpi_create_connector(encoder);
206 if (ret) {
207 DRM_DEV_ERROR(encoder_to_dpi(encoder)->dev,
208 "failed to create connector ret = %d\n", ret);
209 drm_encoder_cleanup(encoder);
210 return ret;
211 }
212
213 return 0;
214}
215
216struct drm_encoder *exynos_dpi_probe(struct device *dev)
217{
218 struct exynos_dpi *ctx;
219 int ret;
220
221 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
222 if (!ctx)
223 return ERR_PTR(-ENOMEM);
224
225 ctx->dev = dev;
226
227 ret = exynos_dpi_parse_dt(ctx);
228 if (ret < 0) {
229 devm_kfree(dev, ctx);
230 return NULL;
231 }
232
233 if (ctx->panel_node) {
234 ctx->panel = of_drm_find_panel(ctx->panel_node);
235 if (IS_ERR(ctx->panel))
236 return ERR_CAST(ctx->panel);
237 }
238
239 return &ctx->encoder;
240}
241
242int exynos_dpi_remove(struct drm_encoder *encoder)
243{
244 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
245
246 exynos_dpi_disable(&ctx->encoder);
247
248 return 0;
249}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Exynos DRM Parallel output support.
4 *
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd
6 *
7 * Contacts: Andrzej Hajda <a.hajda@samsung.com>
8*/
9
10#include <linux/of_graph.h>
11#include <linux/regulator/consumer.h>
12
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_panel.h>
15#include <drm/drm_print.h>
16#include <drm/drm_probe_helper.h>
17#include <drm/drm_simple_kms_helper.h>
18
19#include <video/of_videomode.h>
20#include <video/videomode.h>
21
22#include "exynos_drm_crtc.h"
23
24struct exynos_dpi {
25 struct drm_encoder encoder;
26 struct device *dev;
27 struct device_node *panel_node;
28
29 struct drm_panel *panel;
30 struct drm_connector connector;
31
32 struct videomode *vm;
33};
34
35#define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector)
36
37static inline struct exynos_dpi *encoder_to_dpi(struct drm_encoder *e)
38{
39 return container_of(e, struct exynos_dpi, encoder);
40}
41
42static enum drm_connector_status
43exynos_dpi_detect(struct drm_connector *connector, bool force)
44{
45 struct exynos_dpi *ctx = connector_to_dpi(connector);
46
47 if (ctx->panel)
48 drm_panel_attach(ctx->panel, &ctx->connector);
49
50 return connector_status_connected;
51}
52
53static void exynos_dpi_connector_destroy(struct drm_connector *connector)
54{
55 drm_connector_unregister(connector);
56 drm_connector_cleanup(connector);
57}
58
59static const struct drm_connector_funcs exynos_dpi_connector_funcs = {
60 .detect = exynos_dpi_detect,
61 .fill_modes = drm_helper_probe_single_connector_modes,
62 .destroy = exynos_dpi_connector_destroy,
63 .reset = drm_atomic_helper_connector_reset,
64 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
65 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
66};
67
68static int exynos_dpi_get_modes(struct drm_connector *connector)
69{
70 struct exynos_dpi *ctx = connector_to_dpi(connector);
71
72 /* fimd timings gets precedence over panel modes */
73 if (ctx->vm) {
74 struct drm_display_mode *mode;
75
76 mode = drm_mode_create(connector->dev);
77 if (!mode) {
78 DRM_DEV_ERROR(ctx->dev,
79 "failed to create a new display mode\n");
80 return 0;
81 }
82 drm_display_mode_from_videomode(ctx->vm, mode);
83 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
84 drm_mode_probed_add(connector, mode);
85 return 1;
86 }
87
88 if (ctx->panel)
89 return drm_panel_get_modes(ctx->panel, connector);
90
91 return 0;
92}
93
94static const struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = {
95 .get_modes = exynos_dpi_get_modes,
96};
97
98static int exynos_dpi_create_connector(struct drm_encoder *encoder)
99{
100 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
101 struct drm_connector *connector = &ctx->connector;
102 int ret;
103
104 connector->polled = DRM_CONNECTOR_POLL_HPD;
105
106 ret = drm_connector_init(encoder->dev, connector,
107 &exynos_dpi_connector_funcs,
108 DRM_MODE_CONNECTOR_VGA);
109 if (ret) {
110 DRM_DEV_ERROR(ctx->dev,
111 "failed to initialize connector with drm\n");
112 return ret;
113 }
114
115 drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs);
116 drm_connector_attach_encoder(connector, encoder);
117
118 return 0;
119}
120
121static void exynos_dpi_mode_set(struct drm_encoder *encoder,
122 struct drm_display_mode *mode,
123 struct drm_display_mode *adjusted_mode)
124{
125}
126
127static void exynos_dpi_enable(struct drm_encoder *encoder)
128{
129 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
130
131 if (ctx->panel) {
132 drm_panel_prepare(ctx->panel);
133 drm_panel_enable(ctx->panel);
134 }
135}
136
137static void exynos_dpi_disable(struct drm_encoder *encoder)
138{
139 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
140
141 if (ctx->panel) {
142 drm_panel_disable(ctx->panel);
143 drm_panel_unprepare(ctx->panel);
144 }
145}
146
147static const struct drm_encoder_helper_funcs exynos_dpi_encoder_helper_funcs = {
148 .mode_set = exynos_dpi_mode_set,
149 .enable = exynos_dpi_enable,
150 .disable = exynos_dpi_disable,
151};
152
153enum {
154 FIMD_PORT_IN0,
155 FIMD_PORT_IN1,
156 FIMD_PORT_IN2,
157 FIMD_PORT_RGB,
158 FIMD_PORT_WRB,
159};
160
161static int exynos_dpi_parse_dt(struct exynos_dpi *ctx)
162{
163 struct device *dev = ctx->dev;
164 struct device_node *dn = dev->of_node;
165 struct device_node *np;
166
167 ctx->panel_node = of_graph_get_remote_node(dn, FIMD_PORT_RGB, 0);
168
169 np = of_get_child_by_name(dn, "display-timings");
170 if (np) {
171 struct videomode *vm;
172 int ret;
173
174 of_node_put(np);
175
176 vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL);
177 if (!vm)
178 return -ENOMEM;
179
180 ret = of_get_videomode(dn, vm, 0);
181 if (ret < 0) {
182 devm_kfree(dev, vm);
183 return ret;
184 }
185
186 ctx->vm = vm;
187
188 return 0;
189 }
190
191 if (!ctx->panel_node)
192 return -EINVAL;
193
194 return 0;
195}
196
197int exynos_dpi_bind(struct drm_device *dev, struct drm_encoder *encoder)
198{
199 int ret;
200
201 drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_TMDS);
202
203 drm_encoder_helper_add(encoder, &exynos_dpi_encoder_helper_funcs);
204
205 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
206 if (ret < 0)
207 return ret;
208
209 ret = exynos_dpi_create_connector(encoder);
210 if (ret) {
211 DRM_DEV_ERROR(encoder_to_dpi(encoder)->dev,
212 "failed to create connector ret = %d\n", ret);
213 drm_encoder_cleanup(encoder);
214 return ret;
215 }
216
217 return 0;
218}
219
220struct drm_encoder *exynos_dpi_probe(struct device *dev)
221{
222 struct exynos_dpi *ctx;
223 int ret;
224
225 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
226 if (!ctx)
227 return ERR_PTR(-ENOMEM);
228
229 ctx->dev = dev;
230
231 ret = exynos_dpi_parse_dt(ctx);
232 if (ret < 0) {
233 devm_kfree(dev, ctx);
234 return NULL;
235 }
236
237 if (ctx->panel_node) {
238 ctx->panel = of_drm_find_panel(ctx->panel_node);
239 if (IS_ERR(ctx->panel))
240 return ERR_CAST(ctx->panel);
241 }
242
243 return &ctx->encoder;
244}
245
246int exynos_dpi_remove(struct drm_encoder *encoder)
247{
248 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
249
250 exynos_dpi_disable(&ctx->encoder);
251
252 if (ctx->panel)
253 drm_panel_detach(ctx->panel);
254
255 return 0;
256}