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