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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. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | |
18 | * MA 02110-1301, USA. | |
19 | */ | |
20 | ||
17b5001b | 21 | #include <linux/component.h> |
19022aaa SH |
22 | #include <linux/module.h> |
23 | #include <drm/drmP.h> | |
24 | #include <drm/drm_fb_helper.h> | |
25 | #include <drm/drm_crtc_helper.h> | |
26 | #include <linux/videodev2.h> | |
075c457b | 27 | #include <video/of_display_timing.h> |
19022aaa SH |
28 | |
29 | #include "imx-drm.h" | |
30 | ||
31 | #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector) | |
32 | #define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder) | |
33 | ||
34 | struct imx_parallel_display { | |
35 | struct drm_connector connector; | |
36 | struct imx_drm_connector *imx_drm_connector; | |
37 | struct drm_encoder encoder; | |
38 | struct imx_drm_encoder *imx_drm_encoder; | |
39 | struct device *dev; | |
40 | void *edid; | |
41 | int edid_len; | |
42 | u32 interface_pix_fmt; | |
43 | int mode_valid; | |
44 | struct drm_display_mode mode; | |
45 | }; | |
46 | ||
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 | ||
53 | static void imx_pd_connector_destroy(struct drm_connector *connector) | |
54 | { | |
55 | /* do not free here */ | |
56 | } | |
57 | ||
58 | static int imx_pd_connector_get_modes(struct drm_connector *connector) | |
59 | { | |
60 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
afb12edf | 61 | struct device_node *np = imxpd->dev->of_node; |
19022aaa SH |
62 | int num_modes = 0; |
63 | ||
64 | if (imxpd->edid) { | |
65 | drm_mode_connector_update_edid_property(connector, imxpd->edid); | |
66 | num_modes = drm_add_edid_modes(connector, imxpd->edid); | |
67 | } | |
68 | ||
69 | if (imxpd->mode_valid) { | |
70 | struct drm_display_mode *mode = drm_mode_create(connector->dev); | |
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); | |
075c457b | 79 | of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE); |
afb12edf MV |
80 | drm_mode_copy(mode, &imxpd->mode); |
81 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, | |
19022aaa SH |
82 | drm_mode_probed_add(connector, mode); |
83 | num_modes++; | |
84 | } | |
85 | ||
86 | return num_modes; | |
87 | } | |
88 | ||
19022aaa SH |
89 | static struct drm_encoder *imx_pd_connector_best_encoder( |
90 | struct drm_connector *connector) | |
91 | { | |
92 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
93 | ||
94 | return &imxpd->encoder; | |
95 | } | |
96 | ||
97 | static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode) | |
98 | { | |
99 | } | |
100 | ||
101 | static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder, | |
102 | const struct drm_display_mode *mode, | |
103 | struct drm_display_mode *adjusted_mode) | |
104 | { | |
105 | return true; | |
106 | } | |
107 | ||
108 | static void imx_pd_encoder_prepare(struct drm_encoder *encoder) | |
109 | { | |
110 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); | |
111 | ||
f2d66aad | 112 | imx_drm_panel_format(encoder, imxpd->interface_pix_fmt); |
19022aaa SH |
113 | } |
114 | ||
115 | static void imx_pd_encoder_commit(struct drm_encoder *encoder) | |
116 | { | |
117 | } | |
118 | ||
119 | static void imx_pd_encoder_mode_set(struct drm_encoder *encoder, | |
120 | struct drm_display_mode *mode, | |
121 | struct drm_display_mode *adjusted_mode) | |
122 | { | |
123 | } | |
124 | ||
125 | static void imx_pd_encoder_disable(struct drm_encoder *encoder) | |
126 | { | |
127 | } | |
128 | ||
129 | static void imx_pd_encoder_destroy(struct drm_encoder *encoder) | |
130 | { | |
131 | /* do not free here */ | |
132 | } | |
133 | ||
134 | static struct drm_connector_funcs imx_pd_connector_funcs = { | |
135 | .dpms = drm_helper_connector_dpms, | |
136 | .fill_modes = drm_helper_probe_single_connector_modes, | |
137 | .detect = imx_pd_connector_detect, | |
138 | .destroy = imx_pd_connector_destroy, | |
139 | }; | |
140 | ||
141 | static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = { | |
142 | .get_modes = imx_pd_connector_get_modes, | |
143 | .best_encoder = imx_pd_connector_best_encoder, | |
baa68c4b | 144 | .mode_valid = imx_drm_connector_mode_valid, |
19022aaa SH |
145 | }; |
146 | ||
147 | static struct drm_encoder_funcs imx_pd_encoder_funcs = { | |
148 | .destroy = imx_pd_encoder_destroy, | |
149 | }; | |
150 | ||
151 | static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = { | |
152 | .dpms = imx_pd_encoder_dpms, | |
153 | .mode_fixup = imx_pd_encoder_mode_fixup, | |
154 | .prepare = imx_pd_encoder_prepare, | |
155 | .commit = imx_pd_encoder_commit, | |
156 | .mode_set = imx_pd_encoder_mode_set, | |
157 | .disable = imx_pd_encoder_disable, | |
158 | }; | |
159 | ||
160 | static int imx_pd_register(struct imx_parallel_display *imxpd) | |
161 | { | |
162 | int ret; | |
163 | ||
164 | drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder); | |
165 | ||
166 | imxpd->connector.funcs = &imx_pd_connector_funcs; | |
167 | imxpd->encoder.funcs = &imx_pd_encoder_funcs; | |
168 | ||
169 | imxpd->encoder.encoder_type = DRM_MODE_ENCODER_NONE; | |
170 | imxpd->connector.connector_type = DRM_MODE_CONNECTOR_VGA; | |
171 | ||
172 | drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs); | |
173 | ret = imx_drm_add_encoder(&imxpd->encoder, &imxpd->imx_drm_encoder, | |
174 | THIS_MODULE); | |
175 | if (ret) { | |
176 | dev_err(imxpd->dev, "adding encoder failed with %d\n", ret); | |
177 | return ret; | |
178 | } | |
179 | ||
180 | drm_connector_helper_add(&imxpd->connector, | |
181 | &imx_pd_connector_helper_funcs); | |
182 | ||
183 | ret = imx_drm_add_connector(&imxpd->connector, | |
184 | &imxpd->imx_drm_connector, THIS_MODULE); | |
185 | if (ret) { | |
186 | imx_drm_remove_encoder(imxpd->imx_drm_encoder); | |
187 | dev_err(imxpd->dev, "adding connector failed with %d\n", ret); | |
188 | return ret; | |
189 | } | |
190 | ||
191 | imxpd->connector.encoder = &imxpd->encoder; | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
17b5001b | 196 | static int imx_pd_bind(struct device *dev, struct device *master, void *data) |
19022aaa | 197 | { |
17b5001b | 198 | struct device_node *np = dev->of_node; |
19022aaa SH |
199 | const u8 *edidp; |
200 | struct imx_parallel_display *imxpd; | |
201 | int ret; | |
202 | const char *fmt; | |
203 | ||
17b5001b | 204 | imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL); |
19022aaa SH |
205 | if (!imxpd) |
206 | return -ENOMEM; | |
207 | ||
208 | edidp = of_get_property(np, "edid", &imxpd->edid_len); | |
209 | if (edidp) | |
210 | imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL); | |
211 | ||
212 | ret = of_property_read_string(np, "interface-pix-fmt", &fmt); | |
213 | if (!ret) { | |
214 | if (!strcmp(fmt, "rgb24")) | |
215 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24; | |
216 | else if (!strcmp(fmt, "rgb565")) | |
217 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565; | |
7d0a66c0 MV |
218 | else if (!strcmp(fmt, "bgr666")) |
219 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666; | |
19022aaa SH |
220 | } |
221 | ||
17b5001b | 222 | imxpd->dev = dev; |
19022aaa SH |
223 | |
224 | ret = imx_pd_register(imxpd); | |
225 | if (ret) | |
226 | return ret; | |
227 | ||
228 | ret = imx_drm_encoder_add_possible_crtcs(imxpd->imx_drm_encoder, np); | |
229 | ||
17b5001b | 230 | dev_set_drvdata(dev, imxpd); |
19022aaa SH |
231 | |
232 | return 0; | |
233 | } | |
234 | ||
17b5001b RK |
235 | static void imx_pd_unbind(struct device *dev, struct device *master, |
236 | void *data) | |
19022aaa | 237 | { |
17b5001b | 238 | struct imx_parallel_display *imxpd = dev_get_drvdata(dev); |
19022aaa SH |
239 | struct drm_connector *connector = &imxpd->connector; |
240 | struct drm_encoder *encoder = &imxpd->encoder; | |
241 | ||
242 | drm_mode_connector_detach_encoder(connector, encoder); | |
243 | ||
244 | imx_drm_remove_connector(imxpd->imx_drm_connector); | |
245 | imx_drm_remove_encoder(imxpd->imx_drm_encoder); | |
17b5001b | 246 | } |
19022aaa | 247 | |
17b5001b RK |
248 | static const struct component_ops imx_pd_ops = { |
249 | .bind = imx_pd_bind, | |
250 | .unbind = imx_pd_unbind, | |
251 | }; | |
252 | ||
253 | static int imx_pd_probe(struct platform_device *pdev) | |
254 | { | |
255 | return component_add(&pdev->dev, &imx_pd_ops); | |
256 | } | |
257 | ||
258 | static int imx_pd_remove(struct platform_device *pdev) | |
259 | { | |
260 | component_del(&pdev->dev, &imx_pd_ops); | |
19022aaa SH |
261 | return 0; |
262 | } | |
263 | ||
264 | static const struct of_device_id imx_pd_dt_ids[] = { | |
265 | { .compatible = "fsl,imx-parallel-display", }, | |
266 | { /* sentinel */ } | |
267 | }; | |
fa45f2c7 | 268 | MODULE_DEVICE_TABLE(of, imx_pd_dt_ids); |
19022aaa SH |
269 | |
270 | static struct platform_driver imx_pd_driver = { | |
271 | .probe = imx_pd_probe, | |
99c28f10 | 272 | .remove = imx_pd_remove, |
19022aaa SH |
273 | .driver = { |
274 | .of_match_table = imx_pd_dt_ids, | |
275 | .name = "imx-parallel-display", | |
276 | .owner = THIS_MODULE, | |
277 | }, | |
278 | }; | |
279 | ||
280 | module_platform_driver(imx_pd_driver); | |
281 | ||
282 | MODULE_DESCRIPTION("i.MX parallel display driver"); | |
283 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
284 | MODULE_LICENSE("GPL"); | |
b2da05ff | 285 | MODULE_ALIAS("platform:imx-parallel-display"); |