Commit | Line | Data |
---|---|---|
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; |
f140b0cc | 38 | struct drm_bridge *bridge; |
19022aaa SH |
39 | }; |
40 | ||
3df07390 PZ |
41 | static inline struct imx_parallel_display *con_to_imxpd(struct drm_connector *c) |
42 | { | |
43 | return container_of(c, struct imx_parallel_display, connector); | |
44 | } | |
45 | ||
49f98bc4 PZ |
46 | static inline struct imx_parallel_display *enc_to_imxpd(struct drm_encoder *e) |
47 | { | |
48 | return container_of(e, struct imx_parallel_display, encoder); | |
49 | } | |
50 | ||
19022aaa SH |
51 | static enum drm_connector_status imx_pd_connector_detect( |
52 | struct drm_connector *connector, bool force) | |
53 | { | |
54 | return connector_status_connected; | |
55 | } | |
56 | ||
19022aaa SH |
57 | static int imx_pd_connector_get_modes(struct drm_connector *connector) |
58 | { | |
59 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
afb12edf | 60 | struct device_node *np = imxpd->dev->of_node; |
19022aaa SH |
61 | int num_modes = 0; |
62 | ||
628f435b PZ |
63 | if (imxpd->panel && imxpd->panel->funcs && |
64 | imxpd->panel->funcs->get_modes) { | |
65 | num_modes = imxpd->panel->funcs->get_modes(imxpd->panel); | |
66 | if (num_modes > 0) | |
67 | return num_modes; | |
68 | } | |
69 | ||
19022aaa SH |
70 | if (imxpd->edid) { |
71 | drm_mode_connector_update_edid_property(connector, imxpd->edid); | |
72 | num_modes = drm_add_edid_modes(connector, imxpd->edid); | |
73 | } | |
74 | ||
afb12edf MV |
75 | if (np) { |
76 | struct drm_display_mode *mode = drm_mode_create(connector->dev); | |
76ecd9c9 | 77 | int ret; |
63bc5164 | 78 | |
39dcf4f7 FE |
79 | if (!mode) |
80 | return -EINVAL; | |
76ecd9c9 LW |
81 | |
82 | ret = of_get_drm_display_mode(np, &imxpd->mode, | |
83 | OF_USE_NATIVE_MODE); | |
84 | if (ret) | |
85 | return ret; | |
86 | ||
afb12edf MV |
87 | drm_mode_copy(mode, &imxpd->mode); |
88 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, | |
19022aaa SH |
89 | drm_mode_probed_add(connector, mode); |
90 | num_modes++; | |
91 | } | |
92 | ||
93 | return num_modes; | |
94 | } | |
95 | ||
19022aaa SH |
96 | static struct drm_encoder *imx_pd_connector_best_encoder( |
97 | struct drm_connector *connector) | |
98 | { | |
99 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
100 | ||
49f98bc4 | 101 | return &imxpd->encoder; |
19022aaa SH |
102 | } |
103 | ||
f6e396e5 | 104 | static void imx_pd_encoder_enable(struct drm_encoder *encoder) |
19022aaa | 105 | { |
49f98bc4 | 106 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
ad92c8bf PZ |
107 | |
108 | drm_panel_prepare(imxpd->panel); | |
109 | drm_panel_enable(imxpd->panel); | |
19022aaa SH |
110 | } |
111 | ||
19022aaa SH |
112 | static void imx_pd_encoder_disable(struct drm_encoder *encoder) |
113 | { | |
49f98bc4 | 114 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
ad92c8bf PZ |
115 | |
116 | drm_panel_disable(imxpd->panel); | |
117 | drm_panel_unprepare(imxpd->panel); | |
19022aaa SH |
118 | } |
119 | ||
49f98bc4 PZ |
120 | static int imx_pd_encoder_atomic_check(struct drm_encoder *encoder, |
121 | struct drm_crtc_state *crtc_state, | |
122 | struct drm_connector_state *conn_state) | |
123 | { | |
124 | struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state); | |
125 | struct drm_display_info *di = &conn_state->connector->display_info; | |
126 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); | |
127 | ||
128 | imx_crtc_state->bus_flags = di->bus_flags; | |
129 | if (!imxpd->bus_format && di->num_bus_formats) | |
130 | imx_crtc_state->bus_format = di->bus_formats[0]; | |
131 | else | |
132 | imx_crtc_state->bus_format = imxpd->bus_format; | |
133 | imx_crtc_state->di_hsync_pin = 2; | |
134 | imx_crtc_state->di_vsync_pin = 3; | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
7ae847dd | 139 | static const struct drm_connector_funcs imx_pd_connector_funcs = { |
f6e396e5 | 140 | .dpms = drm_atomic_helper_connector_dpms, |
19022aaa SH |
141 | .fill_modes = drm_helper_probe_single_connector_modes, |
142 | .detect = imx_pd_connector_detect, | |
1b3f7675 | 143 | .destroy = imx_drm_connector_destroy, |
255c35f8 LY |
144 | .reset = drm_atomic_helper_connector_reset, |
145 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | |
146 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | |
19022aaa SH |
147 | }; |
148 | ||
7ae847dd | 149 | static const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = { |
19022aaa SH |
150 | .get_modes = imx_pd_connector_get_modes, |
151 | .best_encoder = imx_pd_connector_best_encoder, | |
19022aaa SH |
152 | }; |
153 | ||
7ae847dd | 154 | static const struct drm_encoder_funcs imx_pd_encoder_funcs = { |
1b3f7675 | 155 | .destroy = imx_drm_encoder_destroy, |
19022aaa SH |
156 | }; |
157 | ||
7ae847dd | 158 | static const struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = { |
f6e396e5 | 159 | .enable = imx_pd_encoder_enable, |
19022aaa | 160 | .disable = imx_pd_encoder_disable, |
49f98bc4 | 161 | .atomic_check = imx_pd_encoder_atomic_check, |
19022aaa SH |
162 | }; |
163 | ||
1b3f7675 RK |
164 | static int imx_pd_register(struct drm_device *drm, |
165 | struct imx_parallel_display *imxpd) | |
19022aaa | 166 | { |
49f98bc4 | 167 | struct drm_encoder *encoder = &imxpd->encoder; |
19022aaa SH |
168 | int ret; |
169 | ||
49f98bc4 | 170 | ret = imx_drm_encoder_parse_of(drm, encoder, imxpd->dev->of_node); |
1b3f7675 RK |
171 | if (ret) |
172 | return ret; | |
19022aaa | 173 | |
c026a3f3 DC |
174 | /* set the connector's dpms to OFF so that |
175 | * drm_helper_connector_dpms() won't return | |
176 | * immediately since the current state is ON | |
177 | * at this point. | |
178 | */ | |
179 | imxpd->connector.dpms = DRM_MODE_DPMS_OFF; | |
180 | ||
49f98bc4 PZ |
181 | drm_encoder_helper_add(encoder, &imx_pd_encoder_helper_funcs); |
182 | drm_encoder_init(drm, encoder, &imx_pd_encoder_funcs, | |
183 | DRM_MODE_ENCODER_NONE, NULL); | |
19022aaa | 184 | |
f140b0cc PZ |
185 | if (!imxpd->bridge) { |
186 | drm_connector_helper_add(&imxpd->connector, | |
187 | &imx_pd_connector_helper_funcs); | |
188 | drm_connector_init(drm, &imxpd->connector, | |
189 | &imx_pd_connector_funcs, | |
190 | DRM_MODE_CONNECTOR_VGA); | |
191 | } | |
19022aaa | 192 | |
628f435b PZ |
193 | if (imxpd->panel) |
194 | drm_panel_attach(imxpd->panel, &imxpd->connector); | |
195 | ||
f140b0cc PZ |
196 | if (imxpd->bridge) { |
197 | imxpd->bridge->encoder = encoder; | |
198 | encoder->bridge = imxpd->bridge; | |
199 | ret = drm_bridge_attach(drm, imxpd->bridge); | |
200 | if (ret < 0) { | |
201 | dev_err(imxpd->dev, "failed to attach bridge: %d\n", | |
202 | ret); | |
203 | return ret; | |
204 | } | |
205 | } else { | |
206 | drm_mode_connector_attach_encoder(&imxpd->connector, encoder); | |
207 | } | |
19022aaa | 208 | |
19022aaa SH |
209 | return 0; |
210 | } | |
211 | ||
17b5001b | 212 | static int imx_pd_bind(struct device *dev, struct device *master, void *data) |
19022aaa | 213 | { |
1b3f7675 | 214 | struct drm_device *drm = data; |
17b5001b | 215 | struct device_node *np = dev->of_node; |
3a1c117f | 216 | struct device_node *ep; |
19022aaa SH |
217 | const u8 *edidp; |
218 | struct imx_parallel_display *imxpd; | |
219 | int ret; | |
032003c5 | 220 | u32 bus_format = 0; |
19022aaa SH |
221 | const char *fmt; |
222 | ||
17b5001b | 223 | imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL); |
19022aaa SH |
224 | if (!imxpd) |
225 | return -ENOMEM; | |
226 | ||
227 | edidp = of_get_property(np, "edid", &imxpd->edid_len); | |
228 | if (edidp) | |
229 | imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL); | |
230 | ||
231 | ret = of_property_read_string(np, "interface-pix-fmt", &fmt); | |
232 | if (!ret) { | |
233 | if (!strcmp(fmt, "rgb24")) | |
032003c5 | 234 | bus_format = MEDIA_BUS_FMT_RGB888_1X24; |
19022aaa | 235 | else if (!strcmp(fmt, "rgb565")) |
032003c5 | 236 | bus_format = MEDIA_BUS_FMT_RGB565_1X16; |
7d0a66c0 | 237 | else if (!strcmp(fmt, "bgr666")) |
032003c5 | 238 | bus_format = MEDIA_BUS_FMT_RGB666_1X18; |
9e74d292 | 239 | else if (!strcmp(fmt, "lvds666")) |
032003c5 | 240 | bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI; |
19022aaa | 241 | } |
49f98bc4 | 242 | imxpd->bus_format = bus_format; |
19022aaa | 243 | |
553a59fc | 244 | /* port@1 is the output port */ |
3a1c117f PZ |
245 | ep = of_graph_get_endpoint_by_regs(np, 1, -1); |
246 | if (ep) { | |
247 | struct device_node *remote; | |
248 | ||
249 | remote = of_graph_get_remote_port_parent(ep); | |
f140b0cc PZ |
250 | if (!remote) { |
251 | dev_warn(dev, "endpoint %s not connected\n", | |
252 | ep->full_name); | |
253 | of_node_put(ep); | |
254 | return -ENODEV; | |
255 | } | |
3a1c117f | 256 | of_node_put(ep); |
f140b0cc PZ |
257 | |
258 | imxpd->panel = of_drm_find_panel(remote); | |
259 | if (imxpd->panel) { | |
260 | dev_dbg(dev, "found panel %s\n", remote->full_name); | |
261 | } else { | |
262 | imxpd->bridge = of_drm_find_bridge(remote); | |
263 | if (imxpd->bridge) | |
264 | dev_dbg(dev, "found bridge %s\n", | |
265 | remote->full_name); | |
553a59fc | 266 | } |
f140b0cc PZ |
267 | if (!imxpd->panel && !imxpd->bridge) { |
268 | dev_dbg(dev, "waiting for panel or bridge %s\n", | |
269 | remote->full_name); | |
270 | of_node_put(remote); | |
3a1c117f | 271 | return -EPROBE_DEFER; |
f140b0cc PZ |
272 | } |
273 | of_node_put(remote); | |
d70e96ae | 274 | } |
628f435b | 275 | |
17b5001b | 276 | imxpd->dev = dev; |
19022aaa | 277 | |
1b3f7675 | 278 | ret = imx_pd_register(drm, imxpd); |
19022aaa SH |
279 | if (ret) |
280 | return ret; | |
281 | ||
17b5001b | 282 | dev_set_drvdata(dev, imxpd); |
19022aaa SH |
283 | |
284 | return 0; | |
285 | } | |
286 | ||
17b5001b RK |
287 | static void imx_pd_unbind(struct device *dev, struct device *master, |
288 | void *data) | |
19022aaa | 289 | { |
17b5001b | 290 | struct imx_parallel_display *imxpd = dev_get_drvdata(dev); |
19022aaa | 291 | |
49f98bc4 | 292 | imxpd->encoder.funcs->destroy(&imxpd->encoder); |
1b3f7675 | 293 | imxpd->connector.funcs->destroy(&imxpd->connector); |
dcbc9eb1 PS |
294 | |
295 | kfree(imxpd->edid); | |
17b5001b | 296 | } |
19022aaa | 297 | |
17b5001b RK |
298 | static const struct component_ops imx_pd_ops = { |
299 | .bind = imx_pd_bind, | |
300 | .unbind = imx_pd_unbind, | |
301 | }; | |
302 | ||
303 | static int imx_pd_probe(struct platform_device *pdev) | |
304 | { | |
305 | return component_add(&pdev->dev, &imx_pd_ops); | |
306 | } | |
307 | ||
308 | static int imx_pd_remove(struct platform_device *pdev) | |
309 | { | |
310 | component_del(&pdev->dev, &imx_pd_ops); | |
dcbc9eb1 | 311 | |
19022aaa SH |
312 | return 0; |
313 | } | |
314 | ||
315 | static const struct of_device_id imx_pd_dt_ids[] = { | |
316 | { .compatible = "fsl,imx-parallel-display", }, | |
317 | { /* sentinel */ } | |
318 | }; | |
fa45f2c7 | 319 | MODULE_DEVICE_TABLE(of, imx_pd_dt_ids); |
19022aaa SH |
320 | |
321 | static struct platform_driver imx_pd_driver = { | |
322 | .probe = imx_pd_probe, | |
99c28f10 | 323 | .remove = imx_pd_remove, |
19022aaa SH |
324 | .driver = { |
325 | .of_match_table = imx_pd_dt_ids, | |
326 | .name = "imx-parallel-display", | |
19022aaa SH |
327 | }, |
328 | }; | |
329 | ||
330 | module_platform_driver(imx_pd_driver); | |
331 | ||
332 | MODULE_DESCRIPTION("i.MX parallel display driver"); | |
333 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
334 | MODULE_LICENSE("GPL"); | |
b2da05ff | 335 | MODULE_ALIAS("platform:imx-parallel-display"); |