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19022aaa SH |
1 | /* |
2 | * i.MX drm driver - parallel display implementation | |
3 | * | |
4 | * Copyright (C) 2012 Sascha Hauer, Pengutronix | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
19022aaa SH |
14 | */ |
15 | ||
17b5001b | 16 | #include <linux/component.h> |
19022aaa SH |
17 | #include <linux/module.h> |
18 | #include <drm/drmP.h> | |
255c35f8 | 19 | #include <drm/drm_atomic_helper.h> |
19022aaa SH |
20 | #include <drm/drm_fb_helper.h> |
21 | #include <drm/drm_crtc_helper.h> | |
628f435b | 22 | #include <drm/drm_panel.h> |
19022aaa | 23 | #include <linux/videodev2.h> |
075c457b | 24 | #include <video/of_display_timing.h> |
553a59fc | 25 | #include <linux/of_graph.h> |
19022aaa SH |
26 | |
27 | #include "imx-drm.h" | |
28 | ||
19022aaa SH |
29 | struct imx_parallel_display { |
30 | struct drm_connector connector; | |
49f98bc4 | 31 | struct drm_encoder encoder; |
19022aaa SH |
32 | struct device *dev; |
33 | void *edid; | |
34 | int edid_len; | |
49f98bc4 | 35 | u32 bus_format; |
19022aaa | 36 | struct drm_display_mode mode; |
628f435b | 37 | struct drm_panel *panel; |
19022aaa SH |
38 | }; |
39 | ||
3df07390 PZ |
40 | static inline struct imx_parallel_display *con_to_imxpd(struct drm_connector *c) |
41 | { | |
42 | return container_of(c, struct imx_parallel_display, connector); | |
43 | } | |
44 | ||
49f98bc4 PZ |
45 | static inline struct imx_parallel_display *enc_to_imxpd(struct drm_encoder *e) |
46 | { | |
47 | return container_of(e, struct imx_parallel_display, encoder); | |
48 | } | |
49 | ||
19022aaa SH |
50 | static enum drm_connector_status imx_pd_connector_detect( |
51 | struct drm_connector *connector, bool force) | |
52 | { | |
53 | return connector_status_connected; | |
54 | } | |
55 | ||
19022aaa SH |
56 | static int imx_pd_connector_get_modes(struct drm_connector *connector) |
57 | { | |
58 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
afb12edf | 59 | struct device_node *np = imxpd->dev->of_node; |
19022aaa SH |
60 | int num_modes = 0; |
61 | ||
628f435b PZ |
62 | if (imxpd->panel && imxpd->panel->funcs && |
63 | imxpd->panel->funcs->get_modes) { | |
64 | num_modes = imxpd->panel->funcs->get_modes(imxpd->panel); | |
65 | if (num_modes > 0) | |
66 | return num_modes; | |
67 | } | |
68 | ||
19022aaa SH |
69 | if (imxpd->edid) { |
70 | drm_mode_connector_update_edid_property(connector, imxpd->edid); | |
71 | num_modes = drm_add_edid_modes(connector, imxpd->edid); | |
72 | } | |
73 | ||
afb12edf MV |
74 | if (np) { |
75 | struct drm_display_mode *mode = drm_mode_create(connector->dev); | |
63bc5164 | 76 | |
39dcf4f7 FE |
77 | if (!mode) |
78 | return -EINVAL; | |
075c457b | 79 | of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE); |
afb12edf MV |
80 | drm_mode_copy(mode, &imxpd->mode); |
81 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, | |
19022aaa SH |
82 | drm_mode_probed_add(connector, mode); |
83 | num_modes++; | |
84 | } | |
85 | ||
86 | return num_modes; | |
87 | } | |
88 | ||
19022aaa SH |
89 | static struct drm_encoder *imx_pd_connector_best_encoder( |
90 | struct drm_connector *connector) | |
91 | { | |
92 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
93 | ||
49f98bc4 | 94 | return &imxpd->encoder; |
19022aaa SH |
95 | } |
96 | ||
f6e396e5 | 97 | static void imx_pd_encoder_enable(struct drm_encoder *encoder) |
19022aaa | 98 | { |
49f98bc4 | 99 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
ad92c8bf PZ |
100 | |
101 | drm_panel_prepare(imxpd->panel); | |
102 | drm_panel_enable(imxpd->panel); | |
19022aaa SH |
103 | } |
104 | ||
19022aaa SH |
105 | static void imx_pd_encoder_disable(struct drm_encoder *encoder) |
106 | { | |
49f98bc4 | 107 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
ad92c8bf PZ |
108 | |
109 | drm_panel_disable(imxpd->panel); | |
110 | drm_panel_unprepare(imxpd->panel); | |
19022aaa SH |
111 | } |
112 | ||
49f98bc4 PZ |
113 | static int imx_pd_encoder_atomic_check(struct drm_encoder *encoder, |
114 | struct drm_crtc_state *crtc_state, | |
115 | struct drm_connector_state *conn_state) | |
116 | { | |
117 | struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state); | |
118 | struct drm_display_info *di = &conn_state->connector->display_info; | |
119 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); | |
120 | ||
121 | imx_crtc_state->bus_flags = di->bus_flags; | |
122 | if (!imxpd->bus_format && di->num_bus_formats) | |
123 | imx_crtc_state->bus_format = di->bus_formats[0]; | |
124 | else | |
125 | imx_crtc_state->bus_format = imxpd->bus_format; | |
126 | imx_crtc_state->di_hsync_pin = 2; | |
127 | imx_crtc_state->di_vsync_pin = 3; | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
7ae847dd | 132 | static const struct drm_connector_funcs imx_pd_connector_funcs = { |
f6e396e5 | 133 | .dpms = drm_atomic_helper_connector_dpms, |
19022aaa SH |
134 | .fill_modes = drm_helper_probe_single_connector_modes, |
135 | .detect = imx_pd_connector_detect, | |
1b3f7675 | 136 | .destroy = imx_drm_connector_destroy, |
255c35f8 LY |
137 | .reset = drm_atomic_helper_connector_reset, |
138 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | |
139 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | |
19022aaa SH |
140 | }; |
141 | ||
7ae847dd | 142 | static const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = { |
19022aaa SH |
143 | .get_modes = imx_pd_connector_get_modes, |
144 | .best_encoder = imx_pd_connector_best_encoder, | |
19022aaa SH |
145 | }; |
146 | ||
7ae847dd | 147 | static const struct drm_encoder_funcs imx_pd_encoder_funcs = { |
1b3f7675 | 148 | .destroy = imx_drm_encoder_destroy, |
19022aaa SH |
149 | }; |
150 | ||
7ae847dd | 151 | static const struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = { |
f6e396e5 | 152 | .enable = imx_pd_encoder_enable, |
19022aaa | 153 | .disable = imx_pd_encoder_disable, |
49f98bc4 | 154 | .atomic_check = imx_pd_encoder_atomic_check, |
19022aaa SH |
155 | }; |
156 | ||
1b3f7675 RK |
157 | static int imx_pd_register(struct drm_device *drm, |
158 | struct imx_parallel_display *imxpd) | |
19022aaa | 159 | { |
49f98bc4 | 160 | struct drm_encoder *encoder = &imxpd->encoder; |
19022aaa SH |
161 | int ret; |
162 | ||
49f98bc4 | 163 | ret = imx_drm_encoder_parse_of(drm, encoder, imxpd->dev->of_node); |
1b3f7675 RK |
164 | if (ret) |
165 | return ret; | |
19022aaa | 166 | |
c026a3f3 DC |
167 | /* set the connector's dpms to OFF so that |
168 | * drm_helper_connector_dpms() won't return | |
169 | * immediately since the current state is ON | |
170 | * at this point. | |
171 | */ | |
172 | imxpd->connector.dpms = DRM_MODE_DPMS_OFF; | |
173 | ||
49f98bc4 PZ |
174 | drm_encoder_helper_add(encoder, &imx_pd_encoder_helper_funcs); |
175 | drm_encoder_init(drm, encoder, &imx_pd_encoder_funcs, | |
176 | DRM_MODE_ENCODER_NONE, NULL); | |
19022aaa SH |
177 | |
178 | drm_connector_helper_add(&imxpd->connector, | |
179 | &imx_pd_connector_helper_funcs); | |
1b3f7675 RK |
180 | drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs, |
181 | DRM_MODE_CONNECTOR_VGA); | |
19022aaa | 182 | |
628f435b PZ |
183 | if (imxpd->panel) |
184 | drm_panel_attach(imxpd->panel, &imxpd->connector); | |
185 | ||
49f98bc4 | 186 | drm_mode_connector_attach_encoder(&imxpd->connector, encoder); |
19022aaa | 187 | |
19022aaa SH |
188 | return 0; |
189 | } | |
190 | ||
17b5001b | 191 | static int imx_pd_bind(struct device *dev, struct device *master, void *data) |
19022aaa | 192 | { |
1b3f7675 | 193 | struct drm_device *drm = data; |
17b5001b | 194 | struct device_node *np = dev->of_node; |
3a1c117f | 195 | struct device_node *ep; |
19022aaa SH |
196 | const u8 *edidp; |
197 | struct imx_parallel_display *imxpd; | |
198 | int ret; | |
032003c5 | 199 | u32 bus_format = 0; |
19022aaa SH |
200 | const char *fmt; |
201 | ||
17b5001b | 202 | imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL); |
19022aaa SH |
203 | if (!imxpd) |
204 | return -ENOMEM; | |
205 | ||
206 | edidp = of_get_property(np, "edid", &imxpd->edid_len); | |
207 | if (edidp) | |
208 | imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL); | |
209 | ||
210 | ret = of_property_read_string(np, "interface-pix-fmt", &fmt); | |
211 | if (!ret) { | |
212 | if (!strcmp(fmt, "rgb24")) | |
032003c5 | 213 | bus_format = MEDIA_BUS_FMT_RGB888_1X24; |
19022aaa | 214 | else if (!strcmp(fmt, "rgb565")) |
032003c5 | 215 | bus_format = MEDIA_BUS_FMT_RGB565_1X16; |
7d0a66c0 | 216 | else if (!strcmp(fmt, "bgr666")) |
032003c5 | 217 | bus_format = MEDIA_BUS_FMT_RGB666_1X18; |
9e74d292 | 218 | else if (!strcmp(fmt, "lvds666")) |
032003c5 | 219 | bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI; |
19022aaa | 220 | } |
49f98bc4 | 221 | imxpd->bus_format = bus_format; |
19022aaa | 222 | |
553a59fc | 223 | /* port@1 is the output port */ |
3a1c117f PZ |
224 | ep = of_graph_get_endpoint_by_regs(np, 1, -1); |
225 | if (ep) { | |
226 | struct device_node *remote; | |
227 | ||
228 | remote = of_graph_get_remote_port_parent(ep); | |
229 | of_node_put(ep); | |
230 | if (remote) { | |
231 | imxpd->panel = of_drm_find_panel(remote); | |
232 | of_node_put(remote); | |
553a59fc | 233 | } |
3a1c117f PZ |
234 | if (!imxpd->panel) |
235 | return -EPROBE_DEFER; | |
d70e96ae | 236 | } |
628f435b | 237 | |
17b5001b | 238 | imxpd->dev = dev; |
19022aaa | 239 | |
1b3f7675 | 240 | ret = imx_pd_register(drm, imxpd); |
19022aaa SH |
241 | if (ret) |
242 | return ret; | |
243 | ||
17b5001b | 244 | dev_set_drvdata(dev, imxpd); |
19022aaa SH |
245 | |
246 | return 0; | |
247 | } | |
248 | ||
17b5001b RK |
249 | static void imx_pd_unbind(struct device *dev, struct device *master, |
250 | void *data) | |
19022aaa | 251 | { |
17b5001b | 252 | struct imx_parallel_display *imxpd = dev_get_drvdata(dev); |
19022aaa | 253 | |
49f98bc4 | 254 | imxpd->encoder.funcs->destroy(&imxpd->encoder); |
1b3f7675 | 255 | imxpd->connector.funcs->destroy(&imxpd->connector); |
dcbc9eb1 PS |
256 | |
257 | kfree(imxpd->edid); | |
17b5001b | 258 | } |
19022aaa | 259 | |
17b5001b RK |
260 | static const struct component_ops imx_pd_ops = { |
261 | .bind = imx_pd_bind, | |
262 | .unbind = imx_pd_unbind, | |
263 | }; | |
264 | ||
265 | static int imx_pd_probe(struct platform_device *pdev) | |
266 | { | |
267 | return component_add(&pdev->dev, &imx_pd_ops); | |
268 | } | |
269 | ||
270 | static int imx_pd_remove(struct platform_device *pdev) | |
271 | { | |
272 | component_del(&pdev->dev, &imx_pd_ops); | |
dcbc9eb1 | 273 | |
19022aaa SH |
274 | return 0; |
275 | } | |
276 | ||
277 | static const struct of_device_id imx_pd_dt_ids[] = { | |
278 | { .compatible = "fsl,imx-parallel-display", }, | |
279 | { /* sentinel */ } | |
280 | }; | |
fa45f2c7 | 281 | MODULE_DEVICE_TABLE(of, imx_pd_dt_ids); |
19022aaa SH |
282 | |
283 | static struct platform_driver imx_pd_driver = { | |
284 | .probe = imx_pd_probe, | |
99c28f10 | 285 | .remove = imx_pd_remove, |
19022aaa SH |
286 | .driver = { |
287 | .of_match_table = imx_pd_dt_ids, | |
288 | .name = "imx-parallel-display", | |
19022aaa SH |
289 | }, |
290 | }; | |
291 | ||
292 | module_platform_driver(imx_pd_driver); | |
293 | ||
294 | MODULE_DESCRIPTION("i.MX parallel display driver"); | |
295 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
296 | MODULE_LICENSE("GPL"); | |
b2da05ff | 297 | MODULE_ALIAS("platform:imx-parallel-display"); |