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 | ||
29 | #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector) | |
032003c5 LY |
30 | #define imx_enc_to_imxpd(x) \ |
31 | container_of(x, struct imx_parallel_display, imx_encoder) | |
19022aaa SH |
32 | |
33 | struct imx_parallel_display { | |
34 | struct drm_connector connector; | |
032003c5 | 35 | struct imx_drm_encoder imx_encoder; |
19022aaa SH |
36 | struct device *dev; |
37 | void *edid; | |
38 | int edid_len; | |
19022aaa | 39 | struct drm_display_mode mode; |
628f435b | 40 | struct drm_panel *panel; |
19022aaa SH |
41 | }; |
42 | ||
43 | static enum drm_connector_status imx_pd_connector_detect( | |
44 | struct drm_connector *connector, bool force) | |
45 | { | |
46 | return connector_status_connected; | |
47 | } | |
48 | ||
19022aaa SH |
49 | static int imx_pd_connector_get_modes(struct drm_connector *connector) |
50 | { | |
51 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
afb12edf | 52 | struct device_node *np = imxpd->dev->of_node; |
19022aaa SH |
53 | int num_modes = 0; |
54 | ||
628f435b PZ |
55 | if (imxpd->panel && imxpd->panel->funcs && |
56 | imxpd->panel->funcs->get_modes) { | |
9832e811 PZ |
57 | struct drm_display_info *di = &connector->display_info; |
58 | ||
628f435b | 59 | num_modes = imxpd->panel->funcs->get_modes(imxpd->panel); |
032003c5 LY |
60 | if (!imxpd->imx_encoder.bus_format && di->num_bus_formats) |
61 | imxpd->imx_encoder.bus_format = di->bus_formats[0]; | |
62 | imxpd->imx_encoder.bus_flags = di->bus_flags; | |
628f435b PZ |
63 | if (num_modes > 0) |
64 | return num_modes; | |
65 | } | |
66 | ||
19022aaa SH |
67 | if (imxpd->edid) { |
68 | drm_mode_connector_update_edid_property(connector, imxpd->edid); | |
69 | num_modes = drm_add_edid_modes(connector, imxpd->edid); | |
70 | } | |
71 | ||
afb12edf MV |
72 | if (np) { |
73 | struct drm_display_mode *mode = drm_mode_create(connector->dev); | |
63bc5164 | 74 | |
39dcf4f7 FE |
75 | if (!mode) |
76 | return -EINVAL; | |
075c457b | 77 | of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE); |
afb12edf MV |
78 | drm_mode_copy(mode, &imxpd->mode); |
79 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, | |
19022aaa SH |
80 | drm_mode_probed_add(connector, mode); |
81 | num_modes++; | |
82 | } | |
83 | ||
84 | return num_modes; | |
85 | } | |
86 | ||
19022aaa SH |
87 | static struct drm_encoder *imx_pd_connector_best_encoder( |
88 | struct drm_connector *connector) | |
89 | { | |
90 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
91 | ||
032003c5 | 92 | return &imxpd->imx_encoder.encoder; |
19022aaa SH |
93 | } |
94 | ||
95 | static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode) | |
96 | { | |
032003c5 LY |
97 | struct imx_drm_encoder *imx_encoder = enc_to_imx_enc(encoder); |
98 | struct imx_parallel_display *imxpd = imx_enc_to_imxpd(imx_encoder); | |
628f435b PZ |
99 | |
100 | if (mode != DRM_MODE_DPMS_ON) | |
101 | drm_panel_disable(imxpd->panel); | |
102 | else | |
103 | drm_panel_enable(imxpd->panel); | |
19022aaa SH |
104 | } |
105 | ||
19022aaa SH |
106 | static void imx_pd_encoder_commit(struct drm_encoder *encoder) |
107 | { | |
032003c5 LY |
108 | struct imx_drm_encoder *imx_encoder = enc_to_imx_enc(encoder); |
109 | struct imx_parallel_display *imxpd = imx_enc_to_imxpd(imx_encoder); | |
ad92c8bf PZ |
110 | |
111 | drm_panel_prepare(imxpd->panel); | |
112 | drm_panel_enable(imxpd->panel); | |
19022aaa SH |
113 | } |
114 | ||
115 | static void imx_pd_encoder_mode_set(struct drm_encoder *encoder, | |
eb10d635 SL |
116 | struct drm_display_mode *orig_mode, |
117 | struct drm_display_mode *mode) | |
19022aaa SH |
118 | { |
119 | } | |
120 | ||
121 | static void imx_pd_encoder_disable(struct drm_encoder *encoder) | |
122 | { | |
032003c5 LY |
123 | struct imx_drm_encoder *imx_encoder = enc_to_imx_enc(encoder); |
124 | struct imx_parallel_display *imxpd = imx_enc_to_imxpd(imx_encoder); | |
ad92c8bf PZ |
125 | |
126 | drm_panel_disable(imxpd->panel); | |
127 | drm_panel_unprepare(imxpd->panel); | |
19022aaa SH |
128 | } |
129 | ||
7ae847dd | 130 | static const struct drm_connector_funcs imx_pd_connector_funcs = { |
19022aaa SH |
131 | .dpms = drm_helper_connector_dpms, |
132 | .fill_modes = drm_helper_probe_single_connector_modes, | |
133 | .detect = imx_pd_connector_detect, | |
1b3f7675 | 134 | .destroy = imx_drm_connector_destroy, |
255c35f8 LY |
135 | .reset = drm_atomic_helper_connector_reset, |
136 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | |
137 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | |
19022aaa SH |
138 | }; |
139 | ||
7ae847dd | 140 | static const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = { |
19022aaa SH |
141 | .get_modes = imx_pd_connector_get_modes, |
142 | .best_encoder = imx_pd_connector_best_encoder, | |
19022aaa SH |
143 | }; |
144 | ||
7ae847dd | 145 | static const struct drm_encoder_funcs imx_pd_encoder_funcs = { |
1b3f7675 | 146 | .destroy = imx_drm_encoder_destroy, |
19022aaa SH |
147 | }; |
148 | ||
7ae847dd | 149 | static const struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = { |
19022aaa | 150 | .dpms = imx_pd_encoder_dpms, |
19022aaa SH |
151 | .commit = imx_pd_encoder_commit, |
152 | .mode_set = imx_pd_encoder_mode_set, | |
153 | .disable = imx_pd_encoder_disable, | |
154 | }; | |
155 | ||
1b3f7675 RK |
156 | static int imx_pd_register(struct drm_device *drm, |
157 | struct imx_parallel_display *imxpd) | |
19022aaa SH |
158 | { |
159 | int ret; | |
160 | ||
032003c5 | 161 | ret = imx_drm_encoder_parse_of(drm, &imxpd->imx_encoder.encoder, |
1b3f7675 RK |
162 | imxpd->dev->of_node); |
163 | if (ret) | |
164 | return ret; | |
19022aaa | 165 | |
c026a3f3 DC |
166 | /* set the connector's dpms to OFF so that |
167 | * drm_helper_connector_dpms() won't return | |
168 | * immediately since the current state is ON | |
169 | * at this point. | |
170 | */ | |
171 | imxpd->connector.dpms = DRM_MODE_DPMS_OFF; | |
172 | ||
032003c5 LY |
173 | drm_encoder_helper_add(&imxpd->imx_encoder.encoder, |
174 | &imx_pd_encoder_helper_funcs); | |
175 | drm_encoder_init(drm, &imxpd->imx_encoder.encoder, | |
176 | &imx_pd_encoder_funcs, 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 | ||
032003c5 LY |
186 | drm_mode_connector_attach_encoder(&imxpd->connector, |
187 | &imxpd->imx_encoder.encoder); | |
19022aaa | 188 | |
19022aaa SH |
189 | return 0; |
190 | } | |
191 | ||
17b5001b | 192 | static int imx_pd_bind(struct device *dev, struct device *master, void *data) |
19022aaa | 193 | { |
1b3f7675 | 194 | struct drm_device *drm = data; |
17b5001b | 195 | struct device_node *np = dev->of_node; |
3a1c117f | 196 | struct device_node *ep; |
19022aaa SH |
197 | const u8 *edidp; |
198 | struct imx_parallel_display *imxpd; | |
199 | int ret; | |
032003c5 | 200 | u32 bus_format = 0; |
19022aaa SH |
201 | const char *fmt; |
202 | ||
17b5001b | 203 | imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL); |
19022aaa SH |
204 | if (!imxpd) |
205 | return -ENOMEM; | |
206 | ||
207 | edidp = of_get_property(np, "edid", &imxpd->edid_len); | |
208 | if (edidp) | |
209 | imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL); | |
210 | ||
211 | ret = of_property_read_string(np, "interface-pix-fmt", &fmt); | |
212 | if (!ret) { | |
213 | if (!strcmp(fmt, "rgb24")) | |
032003c5 | 214 | bus_format = MEDIA_BUS_FMT_RGB888_1X24; |
19022aaa | 215 | else if (!strcmp(fmt, "rgb565")) |
032003c5 | 216 | bus_format = MEDIA_BUS_FMT_RGB565_1X16; |
7d0a66c0 | 217 | else if (!strcmp(fmt, "bgr666")) |
032003c5 | 218 | bus_format = MEDIA_BUS_FMT_RGB666_1X18; |
9e74d292 | 219 | else if (!strcmp(fmt, "lvds666")) |
032003c5 | 220 | bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI; |
19022aaa | 221 | } |
032003c5 LY |
222 | imxpd->imx_encoder.bus_format = bus_format; |
223 | imxpd->imx_encoder.di_hsync_pin = 2; | |
224 | imxpd->imx_encoder.di_vsync_pin = 3; | |
19022aaa | 225 | |
553a59fc | 226 | /* port@1 is the output port */ |
3a1c117f PZ |
227 | ep = of_graph_get_endpoint_by_regs(np, 1, -1); |
228 | if (ep) { | |
229 | struct device_node *remote; | |
230 | ||
231 | remote = of_graph_get_remote_port_parent(ep); | |
232 | of_node_put(ep); | |
233 | if (remote) { | |
234 | imxpd->panel = of_drm_find_panel(remote); | |
235 | of_node_put(remote); | |
553a59fc | 236 | } |
3a1c117f PZ |
237 | if (!imxpd->panel) |
238 | return -EPROBE_DEFER; | |
d70e96ae | 239 | } |
628f435b | 240 | |
17b5001b | 241 | imxpd->dev = dev; |
19022aaa | 242 | |
1b3f7675 | 243 | ret = imx_pd_register(drm, imxpd); |
19022aaa SH |
244 | if (ret) |
245 | return ret; | |
246 | ||
17b5001b | 247 | dev_set_drvdata(dev, imxpd); |
19022aaa SH |
248 | |
249 | return 0; | |
250 | } | |
251 | ||
17b5001b RK |
252 | static void imx_pd_unbind(struct device *dev, struct device *master, |
253 | void *data) | |
19022aaa | 254 | { |
17b5001b | 255 | struct imx_parallel_display *imxpd = dev_get_drvdata(dev); |
19022aaa | 256 | |
032003c5 | 257 | imxpd->imx_encoder.encoder.funcs->destroy(&imxpd->imx_encoder.encoder); |
1b3f7675 | 258 | imxpd->connector.funcs->destroy(&imxpd->connector); |
dcbc9eb1 PS |
259 | |
260 | kfree(imxpd->edid); | |
17b5001b | 261 | } |
19022aaa | 262 | |
17b5001b RK |
263 | static const struct component_ops imx_pd_ops = { |
264 | .bind = imx_pd_bind, | |
265 | .unbind = imx_pd_unbind, | |
266 | }; | |
267 | ||
268 | static int imx_pd_probe(struct platform_device *pdev) | |
269 | { | |
270 | return component_add(&pdev->dev, &imx_pd_ops); | |
271 | } | |
272 | ||
273 | static int imx_pd_remove(struct platform_device *pdev) | |
274 | { | |
275 | component_del(&pdev->dev, &imx_pd_ops); | |
dcbc9eb1 | 276 | |
19022aaa SH |
277 | return 0; |
278 | } | |
279 | ||
280 | static const struct of_device_id imx_pd_dt_ids[] = { | |
281 | { .compatible = "fsl,imx-parallel-display", }, | |
282 | { /* sentinel */ } | |
283 | }; | |
fa45f2c7 | 284 | MODULE_DEVICE_TABLE(of, imx_pd_dt_ids); |
19022aaa SH |
285 | |
286 | static struct platform_driver imx_pd_driver = { | |
287 | .probe = imx_pd_probe, | |
99c28f10 | 288 | .remove = imx_pd_remove, |
19022aaa SH |
289 | .driver = { |
290 | .of_match_table = imx_pd_dt_ids, | |
291 | .name = "imx-parallel-display", | |
19022aaa SH |
292 | }, |
293 | }; | |
294 | ||
295 | module_platform_driver(imx_pd_driver); | |
296 | ||
297 | MODULE_DESCRIPTION("i.MX parallel display driver"); | |
298 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
299 | MODULE_LICENSE("GPL"); | |
b2da05ff | 300 | MODULE_ALIAS("platform:imx-parallel-display"); |