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