Commit | Line | Data |
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0d4bbaf9 RC |
1 | /* |
2 | * Copyright (C) 2012 Texas Instruments | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include <linux/pinctrl/pinmux.h> | |
19 | #include <linux/pinctrl/consumer.h> | |
20 | #include <linux/backlight.h> | |
21 | #include <video/display_timing.h> | |
22 | #include <video/of_display_timing.h> | |
23 | #include <video/videomode.h> | |
24 | ||
25 | #include "tilcdc_drv.h" | |
26 | ||
27 | struct panel_module { | |
28 | struct tilcdc_module base; | |
29 | struct tilcdc_panel_info *info; | |
30 | struct display_timings *timings; | |
31 | struct backlight_device *backlight; | |
32 | }; | |
33 | #define to_panel_module(x) container_of(x, struct panel_module, base) | |
34 | ||
35 | ||
36 | /* | |
37 | * Encoder: | |
38 | */ | |
39 | ||
40 | struct panel_encoder { | |
41 | struct drm_encoder base; | |
42 | struct panel_module *mod; | |
43 | }; | |
44 | #define to_panel_encoder(x) container_of(x, struct panel_encoder, base) | |
45 | ||
46 | ||
47 | static void panel_encoder_destroy(struct drm_encoder *encoder) | |
48 | { | |
49 | struct panel_encoder *panel_encoder = to_panel_encoder(encoder); | |
50 | drm_encoder_cleanup(encoder); | |
51 | kfree(panel_encoder); | |
52 | } | |
53 | ||
54 | static void panel_encoder_dpms(struct drm_encoder *encoder, int mode) | |
55 | { | |
56 | struct panel_encoder *panel_encoder = to_panel_encoder(encoder); | |
57 | struct backlight_device *backlight = panel_encoder->mod->backlight; | |
58 | ||
59 | if (!backlight) | |
60 | return; | |
61 | ||
62 | backlight->props.power = mode == DRM_MODE_DPMS_ON | |
63 | ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; | |
64 | backlight_update_status(backlight); | |
65 | } | |
66 | ||
67 | static bool panel_encoder_mode_fixup(struct drm_encoder *encoder, | |
68 | const struct drm_display_mode *mode, | |
69 | struct drm_display_mode *adjusted_mode) | |
70 | { | |
71 | /* nothing needed */ | |
72 | return true; | |
73 | } | |
74 | ||
75 | static void panel_encoder_prepare(struct drm_encoder *encoder) | |
76 | { | |
77 | struct panel_encoder *panel_encoder = to_panel_encoder(encoder); | |
78 | panel_encoder_dpms(encoder, DRM_MODE_DPMS_OFF); | |
79 | tilcdc_crtc_set_panel_info(encoder->crtc, panel_encoder->mod->info); | |
80 | } | |
81 | ||
82 | static void panel_encoder_commit(struct drm_encoder *encoder) | |
83 | { | |
84 | panel_encoder_dpms(encoder, DRM_MODE_DPMS_ON); | |
85 | } | |
86 | ||
87 | static void panel_encoder_mode_set(struct drm_encoder *encoder, | |
88 | struct drm_display_mode *mode, | |
89 | struct drm_display_mode *adjusted_mode) | |
90 | { | |
91 | /* nothing needed */ | |
92 | } | |
93 | ||
94 | static const struct drm_encoder_funcs panel_encoder_funcs = { | |
95 | .destroy = panel_encoder_destroy, | |
96 | }; | |
97 | ||
98 | static const struct drm_encoder_helper_funcs panel_encoder_helper_funcs = { | |
99 | .dpms = panel_encoder_dpms, | |
100 | .mode_fixup = panel_encoder_mode_fixup, | |
101 | .prepare = panel_encoder_prepare, | |
102 | .commit = panel_encoder_commit, | |
103 | .mode_set = panel_encoder_mode_set, | |
104 | }; | |
105 | ||
106 | static struct drm_encoder *panel_encoder_create(struct drm_device *dev, | |
107 | struct panel_module *mod) | |
108 | { | |
109 | struct panel_encoder *panel_encoder; | |
110 | struct drm_encoder *encoder; | |
111 | int ret; | |
112 | ||
113 | panel_encoder = kzalloc(sizeof(*panel_encoder), GFP_KERNEL); | |
114 | if (!panel_encoder) { | |
115 | dev_err(dev->dev, "allocation failed\n"); | |
116 | return NULL; | |
117 | } | |
118 | ||
119 | panel_encoder->mod = mod; | |
120 | ||
121 | encoder = &panel_encoder->base; | |
122 | encoder->possible_crtcs = 1; | |
123 | ||
124 | ret = drm_encoder_init(dev, encoder, &panel_encoder_funcs, | |
125 | DRM_MODE_ENCODER_LVDS); | |
126 | if (ret < 0) | |
127 | goto fail; | |
128 | ||
129 | drm_encoder_helper_add(encoder, &panel_encoder_helper_funcs); | |
130 | ||
131 | return encoder; | |
132 | ||
133 | fail: | |
134 | panel_encoder_destroy(encoder); | |
135 | return NULL; | |
136 | } | |
137 | ||
138 | /* | |
139 | * Connector: | |
140 | */ | |
141 | ||
142 | struct panel_connector { | |
143 | struct drm_connector base; | |
144 | ||
145 | struct drm_encoder *encoder; /* our connected encoder */ | |
146 | struct panel_module *mod; | |
147 | }; | |
148 | #define to_panel_connector(x) container_of(x, struct panel_connector, base) | |
149 | ||
150 | ||
151 | static void panel_connector_destroy(struct drm_connector *connector) | |
152 | { | |
153 | struct panel_connector *panel_connector = to_panel_connector(connector); | |
154 | drm_connector_cleanup(connector); | |
155 | kfree(panel_connector); | |
156 | } | |
157 | ||
158 | static enum drm_connector_status panel_connector_detect( | |
159 | struct drm_connector *connector, | |
160 | bool force) | |
161 | { | |
162 | return connector_status_connected; | |
163 | } | |
164 | ||
165 | static int panel_connector_get_modes(struct drm_connector *connector) | |
166 | { | |
167 | struct drm_device *dev = connector->dev; | |
168 | struct panel_connector *panel_connector = to_panel_connector(connector); | |
169 | struct display_timings *timings = panel_connector->mod->timings; | |
170 | int i; | |
171 | ||
172 | for (i = 0; i < timings->num_timings; i++) { | |
173 | struct drm_display_mode *mode = drm_mode_create(dev); | |
174 | struct videomode vm; | |
175 | ||
6cd2c7db | 176 | if (videomode_from_timings(timings, &vm, i)) |
0d4bbaf9 RC |
177 | break; |
178 | ||
179 | drm_display_mode_from_videomode(&vm, mode); | |
180 | ||
181 | mode->type = DRM_MODE_TYPE_DRIVER; | |
182 | ||
183 | if (timings->native_mode == i) | |
184 | mode->type |= DRM_MODE_TYPE_PREFERRED; | |
185 | ||
186 | drm_mode_set_name(mode); | |
187 | drm_mode_probed_add(connector, mode); | |
188 | } | |
189 | ||
190 | return i; | |
191 | } | |
192 | ||
193 | static int panel_connector_mode_valid(struct drm_connector *connector, | |
194 | struct drm_display_mode *mode) | |
195 | { | |
196 | struct tilcdc_drm_private *priv = connector->dev->dev_private; | |
197 | /* our only constraints are what the crtc can generate: */ | |
198 | return tilcdc_crtc_mode_valid(priv->crtc, mode); | |
199 | } | |
200 | ||
201 | static struct drm_encoder *panel_connector_best_encoder( | |
202 | struct drm_connector *connector) | |
203 | { | |
204 | struct panel_connector *panel_connector = to_panel_connector(connector); | |
205 | return panel_connector->encoder; | |
206 | } | |
207 | ||
208 | static const struct drm_connector_funcs panel_connector_funcs = { | |
209 | .destroy = panel_connector_destroy, | |
210 | .dpms = drm_helper_connector_dpms, | |
211 | .detect = panel_connector_detect, | |
212 | .fill_modes = drm_helper_probe_single_connector_modes, | |
213 | }; | |
214 | ||
215 | static const struct drm_connector_helper_funcs panel_connector_helper_funcs = { | |
216 | .get_modes = panel_connector_get_modes, | |
217 | .mode_valid = panel_connector_mode_valid, | |
218 | .best_encoder = panel_connector_best_encoder, | |
219 | }; | |
220 | ||
221 | static struct drm_connector *panel_connector_create(struct drm_device *dev, | |
222 | struct panel_module *mod, struct drm_encoder *encoder) | |
223 | { | |
224 | struct panel_connector *panel_connector; | |
225 | struct drm_connector *connector; | |
226 | int ret; | |
227 | ||
228 | panel_connector = kzalloc(sizeof(*panel_connector), GFP_KERNEL); | |
229 | if (!panel_connector) { | |
230 | dev_err(dev->dev, "allocation failed\n"); | |
231 | return NULL; | |
232 | } | |
233 | ||
234 | panel_connector->encoder = encoder; | |
235 | panel_connector->mod = mod; | |
236 | ||
237 | connector = &panel_connector->base; | |
238 | ||
239 | drm_connector_init(dev, connector, &panel_connector_funcs, | |
240 | DRM_MODE_CONNECTOR_LVDS); | |
241 | drm_connector_helper_add(connector, &panel_connector_helper_funcs); | |
242 | ||
243 | connector->interlace_allowed = 0; | |
244 | connector->doublescan_allowed = 0; | |
245 | ||
246 | ret = drm_mode_connector_attach_encoder(connector, encoder); | |
247 | if (ret) | |
248 | goto fail; | |
249 | ||
250 | drm_sysfs_connector_add(connector); | |
251 | ||
252 | return connector; | |
253 | ||
254 | fail: | |
255 | panel_connector_destroy(connector); | |
256 | return NULL; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Module: | |
261 | */ | |
262 | ||
263 | static int panel_modeset_init(struct tilcdc_module *mod, struct drm_device *dev) | |
264 | { | |
265 | struct panel_module *panel_mod = to_panel_module(mod); | |
266 | struct tilcdc_drm_private *priv = dev->dev_private; | |
267 | struct drm_encoder *encoder; | |
268 | struct drm_connector *connector; | |
269 | ||
270 | encoder = panel_encoder_create(dev, panel_mod); | |
271 | if (!encoder) | |
272 | return -ENOMEM; | |
273 | ||
274 | connector = panel_connector_create(dev, panel_mod, encoder); | |
275 | if (!connector) | |
276 | return -ENOMEM; | |
277 | ||
278 | priv->encoders[priv->num_encoders++] = encoder; | |
279 | priv->connectors[priv->num_connectors++] = connector; | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | static void panel_destroy(struct tilcdc_module *mod) | |
285 | { | |
286 | struct panel_module *panel_mod = to_panel_module(mod); | |
287 | ||
288 | if (panel_mod->timings) { | |
289 | display_timings_release(panel_mod->timings); | |
290 | kfree(panel_mod->timings); | |
291 | } | |
292 | ||
293 | tilcdc_module_cleanup(mod); | |
294 | kfree(panel_mod->info); | |
295 | kfree(panel_mod); | |
296 | } | |
297 | ||
298 | static const struct tilcdc_module_ops panel_module_ops = { | |
299 | .modeset_init = panel_modeset_init, | |
300 | .destroy = panel_destroy, | |
301 | }; | |
302 | ||
303 | /* | |
304 | * Device: | |
305 | */ | |
306 | ||
307 | /* maybe move this somewhere common if it is needed by other outputs? */ | |
1733d010 | 308 | static struct tilcdc_panel_info *of_get_panel_info(struct device_node *np) |
0d4bbaf9 RC |
309 | { |
310 | struct device_node *info_np; | |
311 | struct tilcdc_panel_info *info; | |
312 | int ret = 0; | |
313 | ||
314 | if (!np) { | |
315 | pr_err("%s: no devicenode given\n", __func__); | |
316 | return NULL; | |
317 | } | |
318 | ||
319 | info_np = of_get_child_by_name(np, "panel-info"); | |
320 | if (!info_np) { | |
321 | pr_err("%s: could not find panel-info node\n", __func__); | |
322 | return NULL; | |
323 | } | |
324 | ||
325 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
326 | if (!info) { | |
327 | pr_err("%s: allocation failed\n", __func__); | |
328 | return NULL; | |
329 | } | |
330 | ||
331 | ret |= of_property_read_u32(info_np, "ac-bias", &info->ac_bias); | |
332 | ret |= of_property_read_u32(info_np, "ac-bias-intrpt", &info->ac_bias_intrpt); | |
333 | ret |= of_property_read_u32(info_np, "dma-burst-sz", &info->dma_burst_sz); | |
334 | ret |= of_property_read_u32(info_np, "bpp", &info->bpp); | |
335 | ret |= of_property_read_u32(info_np, "fdd", &info->fdd); | |
336 | ret |= of_property_read_u32(info_np, "sync-edge", &info->sync_edge); | |
337 | ret |= of_property_read_u32(info_np, "sync-ctrl", &info->sync_ctrl); | |
338 | ret |= of_property_read_u32(info_np, "raster-order", &info->raster_order); | |
339 | ret |= of_property_read_u32(info_np, "fifo-th", &info->fifo_th); | |
340 | ||
341 | /* optional: */ | |
342 | info->tft_alt_mode = of_property_read_bool(info_np, "tft-alt-mode"); | |
343 | info->invert_pxl_clk = of_property_read_bool(info_np, "invert-pxl-clk"); | |
344 | ||
345 | if (ret) { | |
346 | pr_err("%s: error reading panel-info properties\n", __func__); | |
347 | kfree(info); | |
348 | return NULL; | |
349 | } | |
350 | ||
351 | return info; | |
352 | } | |
353 | ||
354 | static struct of_device_id panel_of_match[]; | |
355 | ||
356 | static int panel_probe(struct platform_device *pdev) | |
357 | { | |
358 | struct device_node *node = pdev->dev.of_node; | |
359 | struct panel_module *panel_mod; | |
360 | struct tilcdc_module *mod; | |
361 | struct pinctrl *pinctrl; | |
362 | int ret = -EINVAL; | |
363 | ||
364 | ||
365 | /* bail out early if no DT data: */ | |
366 | if (!node) { | |
367 | dev_err(&pdev->dev, "device-tree data is missing\n"); | |
368 | return -ENXIO; | |
369 | } | |
370 | ||
371 | panel_mod = kzalloc(sizeof(*panel_mod), GFP_KERNEL); | |
372 | if (!panel_mod) | |
373 | return -ENOMEM; | |
374 | ||
375 | mod = &panel_mod->base; | |
376 | ||
377 | tilcdc_module_init(mod, "panel", &panel_module_ops); | |
378 | ||
379 | pinctrl = devm_pinctrl_get_select_default(&pdev->dev); | |
380 | if (IS_ERR(pinctrl)) | |
381 | dev_warn(&pdev->dev, "pins are not configured\n"); | |
382 | ||
383 | ||
384 | panel_mod->timings = of_get_display_timings(node); | |
385 | if (!panel_mod->timings) { | |
386 | dev_err(&pdev->dev, "could not get panel timings\n"); | |
387 | goto fail; | |
388 | } | |
389 | ||
390 | panel_mod->info = of_get_panel_info(node); | |
391 | if (!panel_mod->info) { | |
392 | dev_err(&pdev->dev, "could not get panel info\n"); | |
393 | goto fail; | |
394 | } | |
395 | ||
dc28aa07 BP |
396 | mod->preferred_bpp = panel_mod->info->bpp; |
397 | ||
0d4bbaf9 RC |
398 | panel_mod->backlight = of_find_backlight_by_node(node); |
399 | if (panel_mod->backlight) | |
400 | dev_info(&pdev->dev, "found backlight\n"); | |
401 | ||
402 | return 0; | |
403 | ||
404 | fail: | |
405 | panel_destroy(mod); | |
406 | return ret; | |
407 | } | |
408 | ||
409 | static int panel_remove(struct platform_device *pdev) | |
410 | { | |
411 | return 0; | |
412 | } | |
413 | ||
414 | static struct of_device_id panel_of_match[] = { | |
415 | { .compatible = "ti,tilcdc,panel", }, | |
416 | { }, | |
417 | }; | |
0d4bbaf9 RC |
418 | |
419 | struct platform_driver panel_driver = { | |
420 | .probe = panel_probe, | |
421 | .remove = panel_remove, | |
422 | .driver = { | |
423 | .owner = THIS_MODULE, | |
424 | .name = "panel", | |
425 | .of_match_table = panel_of_match, | |
426 | }, | |
427 | }; | |
428 | ||
429 | int __init tilcdc_panel_init(void) | |
430 | { | |
431 | return platform_driver_register(&panel_driver); | |
432 | } | |
433 | ||
434 | void __exit tilcdc_panel_fini(void) | |
435 | { | |
436 | platform_driver_unregister(&panel_driver); | |
437 | } |