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> | |
19 | #include <drm/drm_fb_helper.h> | |
20 | #include <drm/drm_crtc_helper.h> | |
628f435b | 21 | #include <drm/drm_panel.h> |
19022aaa | 22 | #include <linux/videodev2.h> |
075c457b | 23 | #include <video/of_display_timing.h> |
19022aaa SH |
24 | |
25 | #include "imx-drm.h" | |
26 | ||
27 | #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector) | |
28 | #define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder) | |
29 | ||
30 | struct imx_parallel_display { | |
31 | struct drm_connector connector; | |
19022aaa | 32 | struct drm_encoder encoder; |
19022aaa SH |
33 | struct device *dev; |
34 | void *edid; | |
35 | int edid_len; | |
36 | u32 interface_pix_fmt; | |
37 | int mode_valid; | |
38 | struct drm_display_mode mode; | |
628f435b | 39 | struct drm_panel *panel; |
19022aaa SH |
40 | }; |
41 | ||
42 | static enum drm_connector_status imx_pd_connector_detect( | |
43 | struct drm_connector *connector, bool force) | |
44 | { | |
45 | return connector_status_connected; | |
46 | } | |
47 | ||
19022aaa SH |
48 | static int imx_pd_connector_get_modes(struct drm_connector *connector) |
49 | { | |
50 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
afb12edf | 51 | struct device_node *np = imxpd->dev->of_node; |
19022aaa SH |
52 | int num_modes = 0; |
53 | ||
628f435b PZ |
54 | if (imxpd->panel && imxpd->panel->funcs && |
55 | imxpd->panel->funcs->get_modes) { | |
56 | num_modes = imxpd->panel->funcs->get_modes(imxpd->panel); | |
57 | if (num_modes > 0) | |
58 | return num_modes; | |
59 | } | |
60 | ||
19022aaa SH |
61 | if (imxpd->edid) { |
62 | drm_mode_connector_update_edid_property(connector, imxpd->edid); | |
63 | num_modes = drm_add_edid_modes(connector, imxpd->edid); | |
64 | } | |
65 | ||
66 | if (imxpd->mode_valid) { | |
67 | struct drm_display_mode *mode = drm_mode_create(connector->dev); | |
63bc5164 | 68 | |
39dcf4f7 FE |
69 | if (!mode) |
70 | return -EINVAL; | |
19022aaa SH |
71 | drm_mode_copy(mode, &imxpd->mode); |
72 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, | |
afb12edf MV |
73 | drm_mode_probed_add(connector, mode); |
74 | num_modes++; | |
75 | } | |
76 | ||
77 | if (np) { | |
78 | struct drm_display_mode *mode = drm_mode_create(connector->dev); | |
63bc5164 | 79 | |
39dcf4f7 FE |
80 | if (!mode) |
81 | return -EINVAL; | |
075c457b | 82 | of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE); |
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 | ||
97 | return &imxpd->encoder; | |
98 | } | |
99 | ||
100 | static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode) | |
101 | { | |
628f435b PZ |
102 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
103 | ||
104 | if (mode != DRM_MODE_DPMS_ON) | |
105 | drm_panel_disable(imxpd->panel); | |
106 | else | |
107 | drm_panel_enable(imxpd->panel); | |
19022aaa SH |
108 | } |
109 | ||
110 | static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder, | |
111 | const struct drm_display_mode *mode, | |
112 | struct drm_display_mode *adjusted_mode) | |
113 | { | |
114 | return true; | |
115 | } | |
116 | ||
117 | static void imx_pd_encoder_prepare(struct drm_encoder *encoder) | |
118 | { | |
119 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); | |
120 | ||
f2d66aad | 121 | imx_drm_panel_format(encoder, imxpd->interface_pix_fmt); |
19022aaa SH |
122 | } |
123 | ||
124 | static void imx_pd_encoder_commit(struct drm_encoder *encoder) | |
125 | { | |
ad92c8bf PZ |
126 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
127 | ||
128 | drm_panel_prepare(imxpd->panel); | |
129 | drm_panel_enable(imxpd->panel); | |
19022aaa SH |
130 | } |
131 | ||
132 | static void imx_pd_encoder_mode_set(struct drm_encoder *encoder, | |
133 | struct drm_display_mode *mode, | |
134 | struct drm_display_mode *adjusted_mode) | |
135 | { | |
136 | } | |
137 | ||
138 | static void imx_pd_encoder_disable(struct drm_encoder *encoder) | |
139 | { | |
ad92c8bf PZ |
140 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
141 | ||
142 | drm_panel_disable(imxpd->panel); | |
143 | drm_panel_unprepare(imxpd->panel); | |
19022aaa SH |
144 | } |
145 | ||
19022aaa SH |
146 | static struct drm_connector_funcs imx_pd_connector_funcs = { |
147 | .dpms = drm_helper_connector_dpms, | |
148 | .fill_modes = drm_helper_probe_single_connector_modes, | |
149 | .detect = imx_pd_connector_detect, | |
1b3f7675 | 150 | .destroy = imx_drm_connector_destroy, |
19022aaa SH |
151 | }; |
152 | ||
153 | static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = { | |
154 | .get_modes = imx_pd_connector_get_modes, | |
155 | .best_encoder = imx_pd_connector_best_encoder, | |
19022aaa SH |
156 | }; |
157 | ||
158 | static struct drm_encoder_funcs imx_pd_encoder_funcs = { | |
1b3f7675 | 159 | .destroy = imx_drm_encoder_destroy, |
19022aaa SH |
160 | }; |
161 | ||
162 | static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = { | |
163 | .dpms = imx_pd_encoder_dpms, | |
164 | .mode_fixup = imx_pd_encoder_mode_fixup, | |
165 | .prepare = imx_pd_encoder_prepare, | |
166 | .commit = imx_pd_encoder_commit, | |
167 | .mode_set = imx_pd_encoder_mode_set, | |
168 | .disable = imx_pd_encoder_disable, | |
169 | }; | |
170 | ||
1b3f7675 RK |
171 | static int imx_pd_register(struct drm_device *drm, |
172 | struct imx_parallel_display *imxpd) | |
19022aaa SH |
173 | { |
174 | int ret; | |
175 | ||
1b3f7675 RK |
176 | ret = imx_drm_encoder_parse_of(drm, &imxpd->encoder, |
177 | imxpd->dev->of_node); | |
178 | if (ret) | |
179 | return ret; | |
19022aaa | 180 | |
c026a3f3 DC |
181 | /* set the connector's dpms to OFF so that |
182 | * drm_helper_connector_dpms() won't return | |
183 | * immediately since the current state is ON | |
184 | * at this point. | |
185 | */ | |
186 | imxpd->connector.dpms = DRM_MODE_DPMS_OFF; | |
187 | ||
19022aaa | 188 | drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs); |
1b3f7675 RK |
189 | drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs, |
190 | DRM_MODE_ENCODER_NONE); | |
19022aaa SH |
191 | |
192 | drm_connector_helper_add(&imxpd->connector, | |
193 | &imx_pd_connector_helper_funcs); | |
1b3f7675 RK |
194 | drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs, |
195 | DRM_MODE_CONNECTOR_VGA); | |
19022aaa | 196 | |
628f435b PZ |
197 | if (imxpd->panel) |
198 | drm_panel_attach(imxpd->panel, &imxpd->connector); | |
199 | ||
1b3f7675 | 200 | drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder); |
19022aaa SH |
201 | |
202 | imxpd->connector.encoder = &imxpd->encoder; | |
203 | ||
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; |
628f435b | 211 | struct device_node *panel_node; |
19022aaa SH |
212 | const u8 *edidp; |
213 | struct imx_parallel_display *imxpd; | |
214 | int ret; | |
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")) | |
228 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24; | |
229 | else if (!strcmp(fmt, "rgb565")) | |
230 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565; | |
7d0a66c0 MV |
231 | else if (!strcmp(fmt, "bgr666")) |
232 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666; | |
9e74d292 | 233 | else if (!strcmp(fmt, "lvds666")) |
1a366abe AO |
234 | imxpd->interface_pix_fmt = |
235 | v4l2_fourcc('L', 'V', 'D', '6'); | |
19022aaa SH |
236 | } |
237 | ||
628f435b PZ |
238 | panel_node = of_parse_phandle(np, "fsl,panel", 0); |
239 | if (panel_node) | |
240 | imxpd->panel = of_drm_find_panel(panel_node); | |
241 | ||
17b5001b | 242 | imxpd->dev = dev; |
19022aaa | 243 | |
1b3f7675 | 244 | ret = imx_pd_register(drm, imxpd); |
19022aaa SH |
245 | if (ret) |
246 | return ret; | |
247 | ||
17b5001b | 248 | dev_set_drvdata(dev, imxpd); |
19022aaa SH |
249 | |
250 | return 0; | |
251 | } | |
252 | ||
17b5001b RK |
253 | static void imx_pd_unbind(struct device *dev, struct device *master, |
254 | void *data) | |
19022aaa | 255 | { |
17b5001b | 256 | struct imx_parallel_display *imxpd = dev_get_drvdata(dev); |
19022aaa | 257 | |
1b3f7675 RK |
258 | imxpd->encoder.funcs->destroy(&imxpd->encoder); |
259 | imxpd->connector.funcs->destroy(&imxpd->connector); | |
dcbc9eb1 PS |
260 | |
261 | kfree(imxpd->edid); | |
17b5001b | 262 | } |
19022aaa | 263 | |
17b5001b RK |
264 | static const struct component_ops imx_pd_ops = { |
265 | .bind = imx_pd_bind, | |
266 | .unbind = imx_pd_unbind, | |
267 | }; | |
268 | ||
269 | static int imx_pd_probe(struct platform_device *pdev) | |
270 | { | |
271 | return component_add(&pdev->dev, &imx_pd_ops); | |
272 | } | |
273 | ||
274 | static int imx_pd_remove(struct platform_device *pdev) | |
275 | { | |
276 | component_del(&pdev->dev, &imx_pd_ops); | |
dcbc9eb1 | 277 | |
19022aaa SH |
278 | return 0; |
279 | } | |
280 | ||
281 | static const struct of_device_id imx_pd_dt_ids[] = { | |
282 | { .compatible = "fsl,imx-parallel-display", }, | |
283 | { /* sentinel */ } | |
284 | }; | |
fa45f2c7 | 285 | MODULE_DEVICE_TABLE(of, imx_pd_dt_ids); |
19022aaa SH |
286 | |
287 | static struct platform_driver imx_pd_driver = { | |
288 | .probe = imx_pd_probe, | |
99c28f10 | 289 | .remove = imx_pd_remove, |
19022aaa SH |
290 | .driver = { |
291 | .of_match_table = imx_pd_dt_ids, | |
292 | .name = "imx-parallel-display", | |
19022aaa SH |
293 | }, |
294 | }; | |
295 | ||
296 | module_platform_driver(imx_pd_driver); | |
297 | ||
298 | MODULE_DESCRIPTION("i.MX parallel display driver"); | |
299 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
300 | MODULE_LICENSE("GPL"); | |
b2da05ff | 301 | MODULE_ALIAS("platform:imx-parallel-display"); |