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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> | |
ebc94461 | 22 | #include <drm/drm_of.h> |
628f435b | 23 | #include <drm/drm_panel.h> |
19022aaa | 24 | #include <linux/videodev2.h> |
075c457b | 25 | #include <video/of_display_timing.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; |
fafc79ef | 36 | u32 bus_flags; |
19022aaa | 37 | struct drm_display_mode mode; |
628f435b | 38 | struct drm_panel *panel; |
f140b0cc | 39 | struct drm_bridge *bridge; |
19022aaa SH |
40 | }; |
41 | ||
3df07390 PZ |
42 | static inline struct imx_parallel_display *con_to_imxpd(struct drm_connector *c) |
43 | { | |
44 | return container_of(c, struct imx_parallel_display, connector); | |
45 | } | |
46 | ||
49f98bc4 PZ |
47 | static inline struct imx_parallel_display *enc_to_imxpd(struct drm_encoder *e) |
48 | { | |
49 | return container_of(e, struct imx_parallel_display, encoder); | |
50 | } | |
51 | ||
19022aaa SH |
52 | static int imx_pd_connector_get_modes(struct drm_connector *connector) |
53 | { | |
54 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
afb12edf | 55 | struct device_node *np = imxpd->dev->of_node; |
19022aaa SH |
56 | int num_modes = 0; |
57 | ||
628f435b PZ |
58 | if (imxpd->panel && imxpd->panel->funcs && |
59 | imxpd->panel->funcs->get_modes) { | |
60 | num_modes = imxpd->panel->funcs->get_modes(imxpd->panel); | |
61 | if (num_modes > 0) | |
62 | return num_modes; | |
63 | } | |
64 | ||
19022aaa SH |
65 | if (imxpd->edid) { |
66 | drm_mode_connector_update_edid_property(connector, imxpd->edid); | |
67 | num_modes = drm_add_edid_modes(connector, imxpd->edid); | |
68 | } | |
69 | ||
afb12edf MV |
70 | if (np) { |
71 | struct drm_display_mode *mode = drm_mode_create(connector->dev); | |
76ecd9c9 | 72 | int ret; |
63bc5164 | 73 | |
39dcf4f7 FE |
74 | if (!mode) |
75 | return -EINVAL; | |
76ecd9c9 LW |
76 | |
77 | ret = of_get_drm_display_mode(np, &imxpd->mode, | |
fafc79ef | 78 | &imxpd->bus_flags, |
76ecd9c9 LW |
79 | OF_USE_NATIVE_MODE); |
80 | if (ret) | |
81 | return ret; | |
82 | ||
afb12edf MV |
83 | drm_mode_copy(mode, &imxpd->mode); |
84 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, | |
19022aaa SH |
85 | drm_mode_probed_add(connector, mode); |
86 | num_modes++; | |
87 | } | |
88 | ||
89 | return num_modes; | |
90 | } | |
91 | ||
19022aaa SH |
92 | static struct drm_encoder *imx_pd_connector_best_encoder( |
93 | struct drm_connector *connector) | |
94 | { | |
95 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
96 | ||
49f98bc4 | 97 | return &imxpd->encoder; |
19022aaa SH |
98 | } |
99 | ||
f6e396e5 | 100 | static void imx_pd_encoder_enable(struct drm_encoder *encoder) |
19022aaa | 101 | { |
49f98bc4 | 102 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
ad92c8bf PZ |
103 | |
104 | drm_panel_prepare(imxpd->panel); | |
105 | drm_panel_enable(imxpd->panel); | |
19022aaa SH |
106 | } |
107 | ||
19022aaa SH |
108 | static void imx_pd_encoder_disable(struct drm_encoder *encoder) |
109 | { | |
49f98bc4 | 110 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
ad92c8bf PZ |
111 | |
112 | drm_panel_disable(imxpd->panel); | |
113 | drm_panel_unprepare(imxpd->panel); | |
19022aaa SH |
114 | } |
115 | ||
49f98bc4 PZ |
116 | static int imx_pd_encoder_atomic_check(struct drm_encoder *encoder, |
117 | struct drm_crtc_state *crtc_state, | |
118 | struct drm_connector_state *conn_state) | |
119 | { | |
120 | struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state); | |
121 | struct drm_display_info *di = &conn_state->connector->display_info; | |
122 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); | |
123 | ||
fafc79ef LW |
124 | if (!imxpd->bus_format && di->num_bus_formats) { |
125 | imx_crtc_state->bus_flags = di->bus_flags; | |
49f98bc4 | 126 | imx_crtc_state->bus_format = di->bus_formats[0]; |
fafc79ef LW |
127 | } else { |
128 | imx_crtc_state->bus_flags = imxpd->bus_flags; | |
49f98bc4 | 129 | imx_crtc_state->bus_format = imxpd->bus_format; |
fafc79ef | 130 | } |
49f98bc4 PZ |
131 | imx_crtc_state->di_hsync_pin = 2; |
132 | imx_crtc_state->di_vsync_pin = 3; | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
7ae847dd | 137 | static const struct drm_connector_funcs imx_pd_connector_funcs = { |
f6e396e5 | 138 | .dpms = drm_atomic_helper_connector_dpms, |
19022aaa | 139 | .fill_modes = drm_helper_probe_single_connector_modes, |
1b3f7675 | 140 | .destroy = imx_drm_connector_destroy, |
255c35f8 LY |
141 | .reset = drm_atomic_helper_connector_reset, |
142 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | |
143 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | |
19022aaa SH |
144 | }; |
145 | ||
7ae847dd | 146 | static const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = { |
19022aaa SH |
147 | .get_modes = imx_pd_connector_get_modes, |
148 | .best_encoder = imx_pd_connector_best_encoder, | |
19022aaa SH |
149 | }; |
150 | ||
7ae847dd | 151 | static const struct drm_encoder_funcs imx_pd_encoder_funcs = { |
1b3f7675 | 152 | .destroy = imx_drm_encoder_destroy, |
19022aaa SH |
153 | }; |
154 | ||
7ae847dd | 155 | static const struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = { |
f6e396e5 | 156 | .enable = imx_pd_encoder_enable, |
19022aaa | 157 | .disable = imx_pd_encoder_disable, |
49f98bc4 | 158 | .atomic_check = imx_pd_encoder_atomic_check, |
19022aaa SH |
159 | }; |
160 | ||
1b3f7675 RK |
161 | static int imx_pd_register(struct drm_device *drm, |
162 | struct imx_parallel_display *imxpd) | |
19022aaa | 163 | { |
49f98bc4 | 164 | struct drm_encoder *encoder = &imxpd->encoder; |
19022aaa SH |
165 | int ret; |
166 | ||
49f98bc4 | 167 | ret = imx_drm_encoder_parse_of(drm, encoder, imxpd->dev->of_node); |
1b3f7675 RK |
168 | if (ret) |
169 | return ret; | |
19022aaa | 170 | |
c026a3f3 DC |
171 | /* set the connector's dpms to OFF so that |
172 | * drm_helper_connector_dpms() won't return | |
173 | * immediately since the current state is ON | |
174 | * at this point. | |
175 | */ | |
176 | imxpd->connector.dpms = DRM_MODE_DPMS_OFF; | |
177 | ||
49f98bc4 PZ |
178 | drm_encoder_helper_add(encoder, &imx_pd_encoder_helper_funcs); |
179 | drm_encoder_init(drm, encoder, &imx_pd_encoder_funcs, | |
180 | DRM_MODE_ENCODER_NONE, NULL); | |
19022aaa | 181 | |
f140b0cc PZ |
182 | if (!imxpd->bridge) { |
183 | drm_connector_helper_add(&imxpd->connector, | |
184 | &imx_pd_connector_helper_funcs); | |
185 | drm_connector_init(drm, &imxpd->connector, | |
186 | &imx_pd_connector_funcs, | |
187 | DRM_MODE_CONNECTOR_VGA); | |
188 | } | |
19022aaa | 189 | |
628f435b PZ |
190 | if (imxpd->panel) |
191 | drm_panel_attach(imxpd->panel, &imxpd->connector); | |
192 | ||
f140b0cc | 193 | if (imxpd->bridge) { |
3bb80f24 | 194 | ret = drm_bridge_attach(encoder, imxpd->bridge, NULL); |
f140b0cc PZ |
195 | if (ret < 0) { |
196 | dev_err(imxpd->dev, "failed to attach bridge: %d\n", | |
197 | ret); | |
198 | return ret; | |
199 | } | |
200 | } else { | |
201 | drm_mode_connector_attach_encoder(&imxpd->connector, encoder); | |
202 | } | |
19022aaa | 203 | |
19022aaa SH |
204 | return 0; |
205 | } | |
206 | ||
17b5001b | 207 | static int imx_pd_bind(struct device *dev, struct device *master, void *data) |
19022aaa | 208 | { |
1b3f7675 | 209 | struct drm_device *drm = data; |
17b5001b | 210 | struct device_node *np = dev->of_node; |
19022aaa SH |
211 | const u8 *edidp; |
212 | struct imx_parallel_display *imxpd; | |
213 | int ret; | |
032003c5 | 214 | u32 bus_format = 0; |
19022aaa SH |
215 | const char *fmt; |
216 | ||
17b5001b | 217 | imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL); |
19022aaa SH |
218 | if (!imxpd) |
219 | return -ENOMEM; | |
220 | ||
221 | edidp = of_get_property(np, "edid", &imxpd->edid_len); | |
222 | if (edidp) | |
223 | imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL); | |
224 | ||
225 | ret = of_property_read_string(np, "interface-pix-fmt", &fmt); | |
226 | if (!ret) { | |
227 | if (!strcmp(fmt, "rgb24")) | |
032003c5 | 228 | bus_format = MEDIA_BUS_FMT_RGB888_1X24; |
19022aaa | 229 | else if (!strcmp(fmt, "rgb565")) |
032003c5 | 230 | bus_format = MEDIA_BUS_FMT_RGB565_1X16; |
7d0a66c0 | 231 | else if (!strcmp(fmt, "bgr666")) |
032003c5 | 232 | bus_format = MEDIA_BUS_FMT_RGB666_1X18; |
9e74d292 | 233 | else if (!strcmp(fmt, "lvds666")) |
032003c5 | 234 | bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI; |
19022aaa | 235 | } |
49f98bc4 | 236 | imxpd->bus_format = bus_format; |
19022aaa | 237 | |
553a59fc | 238 | /* port@1 is the output port */ |
ebc94461 | 239 | ret = drm_of_find_panel_or_bridge(np, 1, 0, &imxpd->panel, &imxpd->bridge); |
799ee297 | 240 | if (ret && ret != -ENODEV) |
ebc94461 | 241 | return ret; |
628f435b | 242 | |
17b5001b | 243 | imxpd->dev = dev; |
19022aaa | 244 | |
1b3f7675 | 245 | ret = imx_pd_register(drm, imxpd); |
19022aaa SH |
246 | if (ret) |
247 | return ret; | |
248 | ||
17b5001b | 249 | dev_set_drvdata(dev, imxpd); |
19022aaa SH |
250 | |
251 | return 0; | |
252 | } | |
253 | ||
17b5001b RK |
254 | static void imx_pd_unbind(struct device *dev, struct device *master, |
255 | void *data) | |
19022aaa | 256 | { |
17b5001b | 257 | struct imx_parallel_display *imxpd = dev_get_drvdata(dev); |
19022aaa | 258 | |
c15d493c PZ |
259 | if (imxpd->panel) |
260 | drm_panel_detach(imxpd->panel); | |
261 | ||
dcbc9eb1 | 262 | kfree(imxpd->edid); |
17b5001b | 263 | } |
19022aaa | 264 | |
17b5001b RK |
265 | static const struct component_ops imx_pd_ops = { |
266 | .bind = imx_pd_bind, | |
267 | .unbind = imx_pd_unbind, | |
268 | }; | |
269 | ||
270 | static int imx_pd_probe(struct platform_device *pdev) | |
271 | { | |
272 | return component_add(&pdev->dev, &imx_pd_ops); | |
273 | } | |
274 | ||
275 | static int imx_pd_remove(struct platform_device *pdev) | |
276 | { | |
277 | component_del(&pdev->dev, &imx_pd_ops); | |
dcbc9eb1 | 278 | |
19022aaa SH |
279 | return 0; |
280 | } | |
281 | ||
282 | static const struct of_device_id imx_pd_dt_ids[] = { | |
283 | { .compatible = "fsl,imx-parallel-display", }, | |
284 | { /* sentinel */ } | |
285 | }; | |
fa45f2c7 | 286 | MODULE_DEVICE_TABLE(of, imx_pd_dt_ids); |
19022aaa SH |
287 | |
288 | static struct platform_driver imx_pd_driver = { | |
289 | .probe = imx_pd_probe, | |
99c28f10 | 290 | .remove = imx_pd_remove, |
19022aaa SH |
291 | .driver = { |
292 | .of_match_table = imx_pd_dt_ids, | |
293 | .name = "imx-parallel-display", | |
19022aaa SH |
294 | }, |
295 | }; | |
296 | ||
297 | module_platform_driver(imx_pd_driver); | |
298 | ||
299 | MODULE_DESCRIPTION("i.MX parallel display driver"); | |
300 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
301 | MODULE_LICENSE("GPL"); | |
b2da05ff | 302 | MODULE_ALIAS("platform:imx-parallel-display"); |