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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 | ||
21 | #include <linux/module.h> | |
22 | #include <drm/drmP.h> | |
23 | #include <drm/drm_fb_helper.h> | |
24 | #include <drm/drm_crtc_helper.h> | |
25 | #include <linux/videodev2.h> | |
075c457b | 26 | #include <video/of_display_timing.h> |
19022aaa SH |
27 | |
28 | #include "imx-drm.h" | |
29 | ||
30 | #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector) | |
31 | #define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder) | |
32 | ||
33 | struct imx_parallel_display { | |
34 | struct drm_connector connector; | |
35 | struct imx_drm_connector *imx_drm_connector; | |
36 | struct drm_encoder encoder; | |
37 | struct imx_drm_encoder *imx_drm_encoder; | |
38 | struct device *dev; | |
39 | void *edid; | |
40 | int edid_len; | |
41 | u32 interface_pix_fmt; | |
42 | int mode_valid; | |
43 | struct drm_display_mode mode; | |
44 | }; | |
45 | ||
46 | static enum drm_connector_status imx_pd_connector_detect( | |
47 | struct drm_connector *connector, bool force) | |
48 | { | |
49 | return connector_status_connected; | |
50 | } | |
51 | ||
52 | static void imx_pd_connector_destroy(struct drm_connector *connector) | |
53 | { | |
54 | /* do not free here */ | |
55 | } | |
56 | ||
57 | static int imx_pd_connector_get_modes(struct drm_connector *connector) | |
58 | { | |
59 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
afb12edf | 60 | struct device_node *np = imxpd->dev->of_node; |
19022aaa SH |
61 | int num_modes = 0; |
62 | ||
63 | if (imxpd->edid) { | |
64 | drm_mode_connector_update_edid_property(connector, imxpd->edid); | |
65 | num_modes = drm_add_edid_modes(connector, imxpd->edid); | |
66 | } | |
67 | ||
68 | if (imxpd->mode_valid) { | |
69 | struct drm_display_mode *mode = drm_mode_create(connector->dev); | |
70 | drm_mode_copy(mode, &imxpd->mode); | |
71 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, | |
afb12edf MV |
72 | drm_mode_probed_add(connector, mode); |
73 | num_modes++; | |
74 | } | |
75 | ||
76 | if (np) { | |
77 | struct drm_display_mode *mode = drm_mode_create(connector->dev); | |
075c457b | 78 | of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE); |
afb12edf MV |
79 | drm_mode_copy(mode, &imxpd->mode); |
80 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, | |
19022aaa SH |
81 | drm_mode_probed_add(connector, mode); |
82 | num_modes++; | |
83 | } | |
84 | ||
85 | return num_modes; | |
86 | } | |
87 | ||
88 | static int imx_pd_connector_mode_valid(struct drm_connector *connector, | |
89 | struct drm_display_mode *mode) | |
90 | { | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static struct drm_encoder *imx_pd_connector_best_encoder( | |
95 | struct drm_connector *connector) | |
96 | { | |
97 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); | |
98 | ||
99 | return &imxpd->encoder; | |
100 | } | |
101 | ||
102 | static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode) | |
103 | { | |
104 | } | |
105 | ||
106 | static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder, | |
107 | const struct drm_display_mode *mode, | |
108 | struct drm_display_mode *adjusted_mode) | |
109 | { | |
110 | return true; | |
111 | } | |
112 | ||
113 | static void imx_pd_encoder_prepare(struct drm_encoder *encoder) | |
114 | { | |
115 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); | |
116 | ||
117 | imx_drm_crtc_panel_format(encoder->crtc, DRM_MODE_ENCODER_NONE, | |
118 | imxpd->interface_pix_fmt); | |
119 | } | |
120 | ||
121 | static void imx_pd_encoder_commit(struct drm_encoder *encoder) | |
122 | { | |
123 | } | |
124 | ||
125 | static void imx_pd_encoder_mode_set(struct drm_encoder *encoder, | |
126 | struct drm_display_mode *mode, | |
127 | struct drm_display_mode *adjusted_mode) | |
128 | { | |
129 | } | |
130 | ||
131 | static void imx_pd_encoder_disable(struct drm_encoder *encoder) | |
132 | { | |
133 | } | |
134 | ||
135 | static void imx_pd_encoder_destroy(struct drm_encoder *encoder) | |
136 | { | |
137 | /* do not free here */ | |
138 | } | |
139 | ||
140 | static struct drm_connector_funcs imx_pd_connector_funcs = { | |
141 | .dpms = drm_helper_connector_dpms, | |
142 | .fill_modes = drm_helper_probe_single_connector_modes, | |
143 | .detect = imx_pd_connector_detect, | |
144 | .destroy = imx_pd_connector_destroy, | |
145 | }; | |
146 | ||
147 | static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = { | |
148 | .get_modes = imx_pd_connector_get_modes, | |
149 | .best_encoder = imx_pd_connector_best_encoder, | |
150 | .mode_valid = imx_pd_connector_mode_valid, | |
151 | }; | |
152 | ||
153 | static struct drm_encoder_funcs imx_pd_encoder_funcs = { | |
154 | .destroy = imx_pd_encoder_destroy, | |
155 | }; | |
156 | ||
157 | static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = { | |
158 | .dpms = imx_pd_encoder_dpms, | |
159 | .mode_fixup = imx_pd_encoder_mode_fixup, | |
160 | .prepare = imx_pd_encoder_prepare, | |
161 | .commit = imx_pd_encoder_commit, | |
162 | .mode_set = imx_pd_encoder_mode_set, | |
163 | .disable = imx_pd_encoder_disable, | |
164 | }; | |
165 | ||
166 | static int imx_pd_register(struct imx_parallel_display *imxpd) | |
167 | { | |
168 | int ret; | |
169 | ||
170 | drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder); | |
171 | ||
172 | imxpd->connector.funcs = &imx_pd_connector_funcs; | |
173 | imxpd->encoder.funcs = &imx_pd_encoder_funcs; | |
174 | ||
175 | imxpd->encoder.encoder_type = DRM_MODE_ENCODER_NONE; | |
176 | imxpd->connector.connector_type = DRM_MODE_CONNECTOR_VGA; | |
177 | ||
178 | drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs); | |
179 | ret = imx_drm_add_encoder(&imxpd->encoder, &imxpd->imx_drm_encoder, | |
180 | THIS_MODULE); | |
181 | if (ret) { | |
182 | dev_err(imxpd->dev, "adding encoder failed with %d\n", ret); | |
183 | return ret; | |
184 | } | |
185 | ||
186 | drm_connector_helper_add(&imxpd->connector, | |
187 | &imx_pd_connector_helper_funcs); | |
188 | ||
189 | ret = imx_drm_add_connector(&imxpd->connector, | |
190 | &imxpd->imx_drm_connector, THIS_MODULE); | |
191 | if (ret) { | |
192 | imx_drm_remove_encoder(imxpd->imx_drm_encoder); | |
193 | dev_err(imxpd->dev, "adding connector failed with %d\n", ret); | |
194 | return ret; | |
195 | } | |
196 | ||
197 | imxpd->connector.encoder = &imxpd->encoder; | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
c4aabf8d | 202 | static int imx_pd_probe(struct platform_device *pdev) |
19022aaa SH |
203 | { |
204 | struct device_node *np = pdev->dev.of_node; | |
205 | const u8 *edidp; | |
206 | struct imx_parallel_display *imxpd; | |
207 | int ret; | |
208 | const char *fmt; | |
209 | ||
210 | imxpd = devm_kzalloc(&pdev->dev, sizeof(*imxpd), GFP_KERNEL); | |
211 | if (!imxpd) | |
212 | return -ENOMEM; | |
213 | ||
214 | edidp = of_get_property(np, "edid", &imxpd->edid_len); | |
215 | if (edidp) | |
216 | imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL); | |
217 | ||
218 | ret = of_property_read_string(np, "interface-pix-fmt", &fmt); | |
219 | if (!ret) { | |
220 | if (!strcmp(fmt, "rgb24")) | |
221 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24; | |
222 | else if (!strcmp(fmt, "rgb565")) | |
223 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565; | |
7d0a66c0 MV |
224 | else if (!strcmp(fmt, "bgr666")) |
225 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666; | |
19022aaa SH |
226 | } |
227 | ||
228 | imxpd->dev = &pdev->dev; | |
229 | ||
230 | ret = imx_pd_register(imxpd); | |
231 | if (ret) | |
232 | return ret; | |
233 | ||
234 | ret = imx_drm_encoder_add_possible_crtcs(imxpd->imx_drm_encoder, np); | |
235 | ||
236 | platform_set_drvdata(pdev, imxpd); | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
8aa1be45 | 241 | static int imx_pd_remove(struct platform_device *pdev) |
19022aaa SH |
242 | { |
243 | struct imx_parallel_display *imxpd = platform_get_drvdata(pdev); | |
244 | struct drm_connector *connector = &imxpd->connector; | |
245 | struct drm_encoder *encoder = &imxpd->encoder; | |
246 | ||
19022aaa SH |
247 | imx_drm_remove_connector(imxpd->imx_drm_connector); |
248 | imx_drm_remove_encoder(imxpd->imx_drm_encoder); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static const struct of_device_id imx_pd_dt_ids[] = { | |
254 | { .compatible = "fsl,imx-parallel-display", }, | |
255 | { /* sentinel */ } | |
256 | }; | |
fa45f2c7 | 257 | MODULE_DEVICE_TABLE(of, imx_pd_dt_ids); |
19022aaa SH |
258 | |
259 | static struct platform_driver imx_pd_driver = { | |
260 | .probe = imx_pd_probe, | |
99c28f10 | 261 | .remove = imx_pd_remove, |
19022aaa SH |
262 | .driver = { |
263 | .of_match_table = imx_pd_dt_ids, | |
264 | .name = "imx-parallel-display", | |
265 | .owner = THIS_MODULE, | |
266 | }, | |
267 | }; | |
268 | ||
269 | module_platform_driver(imx_pd_driver); | |
270 | ||
271 | MODULE_DESCRIPTION("i.MX parallel display driver"); | |
272 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
273 | MODULE_LICENSE("GPL"); | |
b2da05ff | 274 | MODULE_ALIAS("platform:imx-parallel-display"); |