Commit | Line | Data |
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785b93ef DA |
1 | /* |
2 | * Copyright (c) 2006-2009 Red Hat Inc. | |
3 | * Copyright (c) 2006-2008 Intel Corporation | |
4 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> | |
5 | * | |
6 | * DRM framebuffer helper functions | |
7 | * | |
8 | * Permission to use, copy, modify, distribute, and sell this software and its | |
9 | * documentation for any purpose is hereby granted without fee, provided that | |
10 | * the above copyright notice appear in all copies and that both that copyright | |
11 | * notice and this permission notice appear in supporting documentation, and | |
12 | * that the name of the copyright holders not be used in advertising or | |
13 | * publicity pertaining to distribution of the software without specific, | |
14 | * written prior permission. The copyright holders make no representations | |
15 | * about the suitability of this software for any purpose. It is provided "as | |
16 | * is" without express or implied warranty. | |
17 | * | |
18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
24 | * OF THIS SOFTWARE. | |
25 | * | |
26 | * Authors: | |
27 | * Dave Airlie <airlied@linux.ie> | |
28 | * Jesse Barnes <jesse.barnes@intel.com> | |
29 | */ | |
d56b1b9d SK |
30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | ||
3b40a443 | 32 | #include <linux/kernel.h> |
785b93ef | 33 | #include <linux/sysrq.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
785b93ef | 35 | #include <linux/fb.h> |
e0cd3608 | 36 | #include <linux/module.h> |
760285e7 DH |
37 | #include <drm/drmP.h> |
38 | #include <drm/drm_crtc.h> | |
39 | #include <drm/drm_fb_helper.h> | |
40 | #include <drm/drm_crtc_helper.h> | |
785b93ef DA |
41 | |
42 | static LIST_HEAD(kernel_fb_helper_list); | |
43 | ||
d0ddc033 DV |
44 | /** |
45 | * DOC: fbdev helpers | |
46 | * | |
47 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel | |
83c617c5 | 48 | * mode setting driver. They can be used mostly independently from the crtc |
d0ddc033 DV |
49 | * helper functions used by many drivers to implement the kernel mode setting |
50 | * interfaces. | |
207fd329 DV |
51 | * |
52 | * Initialization is done as a three-step process with drm_fb_helper_init(), | |
53 | * drm_fb_helper_single_add_all_connectors() and drm_fb_helper_initial_config(). | |
83c617c5 | 54 | * Drivers with fancier requirements than the default behaviour can override the |
207fd329 DV |
55 | * second step with their own code. Teardown is done with drm_fb_helper_fini(). |
56 | * | |
57 | * At runtime drivers should restore the fbdev console by calling | |
58 | * drm_fb_helper_restore_fbdev_mode() from their ->lastclose callback. They | |
59 | * should also notify the fb helper code from updates to the output | |
60 | * configuration by calling drm_fb_helper_hotplug_event(). For easier | |
61 | * integration with the output polling code in drm_crtc_helper.c the modeset | |
83c617c5 | 62 | * code provides a ->output_poll_changed callback. |
207fd329 DV |
63 | * |
64 | * All other functions exported by the fb helper library can be used to | |
65 | * implement the fbdev driver interface by the driver. | |
d0ddc033 DV |
66 | */ |
67 | ||
207fd329 DV |
68 | /** |
69 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
70 | * emulation helper | |
71 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
72 | * | |
73 | * This functions adds all the available connectors for use with the given | |
74 | * fb_helper. This is a separate step to allow drivers to freely assign | |
75 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
76 | * not adequate to be used for the fbcon. | |
77 | * | |
78 | * Since this is part of the initial setup before the fbdev is published, no | |
79 | * locking is required. | |
80 | */ | |
0b4c0f3f | 81 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 82 | { |
0b4c0f3f DA |
83 | struct drm_device *dev = fb_helper->dev; |
84 | struct drm_connector *connector; | |
85 | int i; | |
d50ba256 | 86 | |
0b4c0f3f DA |
87 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
88 | struct drm_fb_helper_connector *fb_helper_connector; | |
89 | ||
90 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
91 | if (!fb_helper_connector) | |
92 | goto fail; | |
d50ba256 | 93 | |
0b4c0f3f DA |
94 | fb_helper_connector->connector = connector; |
95 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
96 | } | |
d50ba256 | 97 | return 0; |
0b4c0f3f DA |
98 | fail: |
99 | for (i = 0; i < fb_helper->connector_count; i++) { | |
100 | kfree(fb_helper->connector_info[i]); | |
101 | fb_helper->connector_info[i] = NULL; | |
102 | } | |
103 | fb_helper->connector_count = 0; | |
104 | return -ENOMEM; | |
d50ba256 | 105 | } |
0b4c0f3f | 106 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 107 | |
0b4c0f3f | 108 | static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper) |
d50ba256 | 109 | { |
0b4c0f3f DA |
110 | struct drm_fb_helper_connector *fb_helper_conn; |
111 | int i; | |
d50ba256 | 112 | |
0b4c0f3f | 113 | for (i = 0; i < fb_helper->connector_count; i++) { |
1794d257 CW |
114 | struct drm_cmdline_mode *mode; |
115 | struct drm_connector *connector; | |
d50ba256 DA |
116 | char *option = NULL; |
117 | ||
0b4c0f3f | 118 | fb_helper_conn = fb_helper->connector_info[i]; |
1794d257 CW |
119 | connector = fb_helper_conn->connector; |
120 | mode = &fb_helper_conn->cmdline_mode; | |
0b4c0f3f | 121 | |
d50ba256 | 122 | /* do something on return - turn off connector maybe */ |
1794d257 | 123 | if (fb_get_options(drm_get_connector_name(connector), &option)) |
d50ba256 DA |
124 | continue; |
125 | ||
1794d257 CW |
126 | if (drm_mode_parse_command_line_for_connector(option, |
127 | connector, | |
128 | mode)) { | |
129 | if (mode->force) { | |
130 | const char *s; | |
131 | switch (mode->force) { | |
6c91083f SK |
132 | case DRM_FORCE_OFF: |
133 | s = "OFF"; | |
134 | break; | |
135 | case DRM_FORCE_ON_DIGITAL: | |
136 | s = "ON - dig"; | |
137 | break; | |
1794d257 | 138 | default: |
6c91083f SK |
139 | case DRM_FORCE_ON: |
140 | s = "ON"; | |
141 | break; | |
1794d257 CW |
142 | } |
143 | ||
144 | DRM_INFO("forcing %s connector %s\n", | |
145 | drm_get_connector_name(connector), s); | |
146 | connector->force = mode->force; | |
147 | } | |
148 | ||
149 | DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", | |
150 | drm_get_connector_name(connector), | |
151 | mode->xres, mode->yres, | |
152 | mode->refresh_specified ? mode->refresh : 60, | |
153 | mode->rb ? " reduced blanking" : "", | |
154 | mode->margins ? " with margins" : "", | |
155 | mode->interlace ? " interlaced" : ""); | |
156 | } | |
157 | ||
d50ba256 DA |
158 | } |
159 | return 0; | |
160 | } | |
161 | ||
99231028 JW |
162 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
163 | { | |
164 | uint16_t *r_base, *g_base, *b_base; | |
165 | int i; | |
166 | ||
04c0c569 VS |
167 | if (helper->funcs->gamma_get == NULL) |
168 | return; | |
169 | ||
99231028 JW |
170 | r_base = crtc->gamma_store; |
171 | g_base = r_base + crtc->gamma_size; | |
172 | b_base = g_base + crtc->gamma_size; | |
173 | ||
174 | for (i = 0; i < crtc->gamma_size; i++) | |
175 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
176 | } | |
177 | ||
178 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
179 | { | |
180 | uint16_t *r_base, *g_base, *b_base; | |
181 | ||
ebe0f244 LP |
182 | if (crtc->funcs->gamma_set == NULL) |
183 | return; | |
184 | ||
99231028 JW |
185 | r_base = crtc->gamma_store; |
186 | g_base = r_base + crtc->gamma_size; | |
187 | b_base = g_base + crtc->gamma_size; | |
188 | ||
189 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); | |
190 | } | |
191 | ||
207fd329 DV |
192 | /** |
193 | * drm_fb_helper_debug_enter - implementation for ->fb_debug_enter | |
194 | * @info: fbdev registered by the helper | |
195 | */ | |
1a7aba7f JB |
196 | int drm_fb_helper_debug_enter(struct fb_info *info) |
197 | { | |
198 | struct drm_fb_helper *helper = info->par; | |
199 | struct drm_crtc_helper_funcs *funcs; | |
200 | int i; | |
201 | ||
202 | if (list_empty(&kernel_fb_helper_list)) | |
203 | return false; | |
204 | ||
205 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
206 | for (i = 0; i < helper->crtc_count; i++) { | |
207 | struct drm_mode_set *mode_set = | |
208 | &helper->crtc_info[i].mode_set; | |
209 | ||
210 | if (!mode_set->crtc->enabled) | |
211 | continue; | |
212 | ||
213 | funcs = mode_set->crtc->helper_private; | |
99231028 | 214 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
215 | funcs->mode_set_base_atomic(mode_set->crtc, |
216 | mode_set->fb, | |
217 | mode_set->x, | |
413d45d3 | 218 | mode_set->y, |
21c74a8e | 219 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
220 | } |
221 | } | |
222 | ||
223 | return 0; | |
224 | } | |
225 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
226 | ||
227 | /* Find the real fb for a given fb helper CRTC */ | |
228 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
229 | { | |
230 | struct drm_device *dev = crtc->dev; | |
231 | struct drm_crtc *c; | |
232 | ||
233 | list_for_each_entry(c, &dev->mode_config.crtc_list, head) { | |
234 | if (crtc->base.id == c->base.id) | |
f4510a27 | 235 | return c->primary->fb; |
1a7aba7f JB |
236 | } |
237 | ||
238 | return NULL; | |
239 | } | |
240 | ||
207fd329 DV |
241 | /** |
242 | * drm_fb_helper_debug_leave - implementation for ->fb_debug_leave | |
243 | * @info: fbdev registered by the helper | |
244 | */ | |
1a7aba7f JB |
245 | int drm_fb_helper_debug_leave(struct fb_info *info) |
246 | { | |
247 | struct drm_fb_helper *helper = info->par; | |
248 | struct drm_crtc *crtc; | |
249 | struct drm_crtc_helper_funcs *funcs; | |
250 | struct drm_framebuffer *fb; | |
251 | int i; | |
252 | ||
253 | for (i = 0; i < helper->crtc_count; i++) { | |
254 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
255 | crtc = mode_set->crtc; | |
256 | funcs = crtc->helper_private; | |
257 | fb = drm_mode_config_fb(crtc); | |
258 | ||
259 | if (!crtc->enabled) | |
260 | continue; | |
261 | ||
262 | if (!fb) { | |
263 | DRM_ERROR("no fb to restore??\n"); | |
264 | continue; | |
265 | } | |
266 | ||
99231028 | 267 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 268 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 269 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
270 | } |
271 | ||
272 | return 0; | |
273 | } | |
274 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
275 | ||
6aed8ec3 DV |
276 | /** |
277 | * drm_fb_helper_restore_fbdev_mode - restore fbdev configuration | |
278 | * @fb_helper: fbcon to restore | |
279 | * | |
207fd329 DV |
280 | * This should be called from driver's drm ->lastclose callback |
281 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
282 | * the user isn't greeted with a black screen when e.g. X dies. | |
6aed8ec3 | 283 | */ |
e8e7a2b8 DA |
284 | bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
285 | { | |
3858bc5d VS |
286 | struct drm_device *dev = fb_helper->dev; |
287 | struct drm_plane *plane; | |
e8e7a2b8 | 288 | bool error = false; |
3858bc5d VS |
289 | int i; |
290 | ||
291 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 292 | |
3858bc5d | 293 | list_for_each_entry(plane, &dev->mode_config.plane_list, head) |
e27dde3e MR |
294 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
295 | drm_plane_force_disable(plane); | |
6aed8ec3 | 296 | |
e8e7a2b8 DA |
297 | for (i = 0; i < fb_helper->crtc_count; i++) { |
298 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
299 | struct drm_crtc *crtc = mode_set->crtc; |
300 | int ret; | |
301 | ||
302 | if (crtc->funcs->cursor_set) { | |
303 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); | |
304 | if (ret) | |
305 | error = true; | |
306 | } | |
307 | ||
2d13b679 | 308 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 DA |
309 | if (ret) |
310 | error = true; | |
311 | } | |
312 | return error; | |
313 | } | |
314 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode); | |
315 | ||
d21bf469 DV |
316 | /* |
317 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
318 | * and panic handling. | |
319 | */ | |
78b9c353 | 320 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 321 | { |
785b93ef DA |
322 | bool ret, error = false; |
323 | struct drm_fb_helper *helper; | |
324 | ||
325 | if (list_empty(&kernel_fb_helper_list)) | |
326 | return false; | |
327 | ||
328 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
329 | struct drm_device *dev = helper->dev; |
330 | ||
331 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
332 | continue; | |
333 | ||
334 | if (!mutex_trylock(&dev->mode_config.mutex)) { | |
335 | error = true; | |
e8e7a2b8 | 336 | continue; |
b77f0765 | 337 | } |
e8e7a2b8 DA |
338 | |
339 | ret = drm_fb_helper_restore_fbdev_mode(helper); | |
340 | if (ret) | |
341 | error = true; | |
b77f0765 TR |
342 | |
343 | mutex_unlock(&dev->mode_config.mutex); | |
785b93ef DA |
344 | } |
345 | return error; | |
346 | } | |
347 | ||
43c8a849 | 348 | static int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, |
785b93ef DA |
349 | void *panic_str) |
350 | { | |
d68752cf HD |
351 | /* |
352 | * It's a waste of time and effort to switch back to text console | |
353 | * if the kernel should reboot before panic messages can be seen. | |
354 | */ | |
355 | if (panic_timeout < 0) | |
356 | return 0; | |
357 | ||
d56b1b9d | 358 | pr_err("panic occurred, switching back to text console\n"); |
785b93ef | 359 | return drm_fb_helper_force_kernel_mode(); |
785b93ef | 360 | } |
785b93ef DA |
361 | |
362 | static struct notifier_block paniced = { | |
363 | .notifier_call = drm_fb_helper_panic, | |
364 | }; | |
365 | ||
20c60c35 DV |
366 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
367 | { | |
368 | struct drm_device *dev = fb_helper->dev; | |
369 | struct drm_crtc *crtc; | |
370 | int bound = 0, crtcs_bound = 0; | |
371 | ||
520edd13 PZ |
372 | /* Sometimes user space wants everything disabled, so don't steal the |
373 | * display if there's a master. */ | |
374 | if (dev->primary->master) | |
375 | return false; | |
376 | ||
20c60c35 | 377 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
f4510a27 | 378 | if (crtc->primary->fb) |
20c60c35 | 379 | crtcs_bound++; |
f4510a27 | 380 | if (crtc->primary->fb == fb_helper->fb) |
20c60c35 DV |
381 | bound++; |
382 | } | |
383 | ||
384 | if (bound < crtcs_bound) | |
385 | return false; | |
520edd13 | 386 | |
20c60c35 DV |
387 | return true; |
388 | } | |
389 | ||
bea1d35b | 390 | #ifdef CONFIG_MAGIC_SYSRQ |
785b93ef DA |
391 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
392 | { | |
d21bf469 DV |
393 | bool ret; |
394 | ret = drm_fb_helper_force_kernel_mode(); | |
395 | if (ret == true) | |
396 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
397 | } |
398 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
399 | ||
1495cc9d | 400 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
401 | { |
402 | schedule_work(&drm_fb_helper_restore_work); | |
403 | } | |
404 | ||
405 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
406 | .handler = drm_fb_helper_sysrq, | |
407 | .help_msg = "force-fb(V)", | |
408 | .action_msg = "Restore framebuffer console", | |
409 | }; | |
b8c40d62 RD |
410 | #else |
411 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 412 | #endif |
785b93ef | 413 | |
3a8148c5 | 414 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
415 | { |
416 | struct drm_fb_helper *fb_helper = info->par; | |
417 | struct drm_device *dev = fb_helper->dev; | |
418 | struct drm_crtc *crtc; | |
023eb571 | 419 | struct drm_connector *connector; |
023eb571 | 420 | int i, j; |
785b93ef | 421 | |
928c2f0c DV |
422 | /* |
423 | * fbdev->blank can be called from irq context in case of a panic. | |
1b1d5397 DV |
424 | * Since we already have our own special panic handler which will |
425 | * restore the fbdev console mode completely, just bail out early. | |
426 | */ | |
427 | if (oops_in_progress) | |
428 | return; | |
429 | ||
785b93ef | 430 | /* |
3a8148c5 | 431 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 432 | */ |
84849903 | 433 | drm_modeset_lock_all(dev); |
20c60c35 DV |
434 | if (!drm_fb_helper_is_bound(fb_helper)) { |
435 | drm_modeset_unlock_all(dev); | |
436 | return; | |
437 | } | |
438 | ||
e87b2c42 | 439 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 440 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 441 | |
8be48d92 DA |
442 | if (!crtc->enabled) |
443 | continue; | |
444 | ||
3a8148c5 | 445 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
446 | for (j = 0; j < fb_helper->connector_count; j++) { |
447 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 448 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 449 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 450 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 451 | } |
785b93ef | 452 | } |
84849903 | 453 | drm_modeset_unlock_all(dev); |
785b93ef DA |
454 | } |
455 | ||
207fd329 DV |
456 | /** |
457 | * drm_fb_helper_blank - implementation for ->fb_blank | |
458 | * @blank: desired blanking state | |
459 | * @info: fbdev registered by the helper | |
460 | */ | |
785b93ef DA |
461 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
462 | { | |
463 | switch (blank) { | |
731b5a15 | 464 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 465 | case FB_BLANK_UNBLANK: |
3a8148c5 | 466 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 467 | break; |
731b5a15 | 468 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 469 | case FB_BLANK_NORMAL: |
3a8148c5 | 470 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 471 | break; |
731b5a15 | 472 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 473 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 474 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 475 | break; |
731b5a15 | 476 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 477 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 478 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 479 | break; |
731b5a15 | 480 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 481 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 482 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
483 | break; |
484 | } | |
485 | return 0; | |
486 | } | |
487 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
488 | ||
489 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
490 | { | |
491 | int i; | |
492 | ||
0b4c0f3f DA |
493 | for (i = 0; i < helper->connector_count; i++) |
494 | kfree(helper->connector_info[i]); | |
495 | kfree(helper->connector_info); | |
a1b7736d | 496 | for (i = 0; i < helper->crtc_count; i++) { |
785b93ef | 497 | kfree(helper->crtc_info[i].mode_set.connectors); |
a1b7736d SH |
498 | if (helper->crtc_info[i].mode_set.mode) |
499 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); | |
500 | } | |
785b93ef DA |
501 | kfree(helper->crtc_info); |
502 | } | |
503 | ||
207fd329 DV |
504 | /** |
505 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
506 | * @dev: drm device | |
507 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
508 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation | |
509 | * @max_conn_count: max connector count | |
510 | * | |
511 | * This allocates the structures for the fbdev helper with the given limits. | |
512 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
513 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
514 | * to allow driver writes more control over the exact init sequence. | |
515 | * | |
516 | * Drivers must set fb_helper->funcs before calling | |
517 | * drm_fb_helper_initial_config(). | |
518 | * | |
519 | * RETURNS: | |
520 | * Zero if everything went ok, nonzero otherwise. | |
521 | */ | |
4abe3520 DA |
522 | int drm_fb_helper_init(struct drm_device *dev, |
523 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 524 | int crtc_count, int max_conn_count) |
785b93ef | 525 | { |
785b93ef | 526 | struct drm_crtc *crtc; |
785b93ef DA |
527 | int i; |
528 | ||
04cfe97e XL |
529 | if (!max_conn_count) |
530 | return -EINVAL; | |
531 | ||
4abe3520 | 532 | fb_helper->dev = dev; |
4abe3520 DA |
533 | |
534 | INIT_LIST_HEAD(&fb_helper->kernel_fb_list); | |
535 | ||
536 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); | |
537 | if (!fb_helper->crtc_info) | |
785b93ef DA |
538 | return -ENOMEM; |
539 | ||
4abe3520 DA |
540 | fb_helper->crtc_count = crtc_count; |
541 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
542 | if (!fb_helper->connector_info) { | |
543 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
544 | return -ENOMEM; |
545 | } | |
4abe3520 | 546 | fb_helper->connector_count = 0; |
785b93ef DA |
547 | |
548 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 549 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
550 | kcalloc(max_conn_count, |
551 | sizeof(struct drm_connector *), | |
552 | GFP_KERNEL); | |
553 | ||
4a1b0714 | 554 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 555 | goto out_free; |
4abe3520 | 556 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
557 | } |
558 | ||
559 | i = 0; | |
560 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
4abe3520 | 561 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
562 | i++; |
563 | } | |
e9ad3181 | 564 | |
785b93ef DA |
565 | return 0; |
566 | out_free: | |
4abe3520 | 567 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
568 | return -ENOMEM; |
569 | } | |
4abe3520 DA |
570 | EXPORT_SYMBOL(drm_fb_helper_init); |
571 | ||
572 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) | |
573 | { | |
574 | if (!list_empty(&fb_helper->kernel_fb_list)) { | |
575 | list_del(&fb_helper->kernel_fb_list); | |
576 | if (list_empty(&kernel_fb_helper_list)) { | |
d56b1b9d | 577 | pr_info("drm: unregistered panic notifier\n"); |
4abe3520 DA |
578 | atomic_notifier_chain_unregister(&panic_notifier_list, |
579 | &paniced); | |
580 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
581 | } | |
582 | } | |
583 | ||
584 | drm_fb_helper_crtc_free(fb_helper); | |
585 | ||
4abe3520 DA |
586 | } |
587 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 588 | |
c850cb78 | 589 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
590 | u16 blue, u16 regno, struct fb_info *info) |
591 | { | |
592 | struct drm_fb_helper *fb_helper = info->par; | |
593 | struct drm_framebuffer *fb = fb_helper->fb; | |
594 | int pindex; | |
595 | ||
c850cb78 DA |
596 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
597 | u32 *palette; | |
598 | u32 value; | |
599 | /* place color in psuedopalette */ | |
600 | if (regno > 16) | |
601 | return -EINVAL; | |
602 | palette = (u32 *)info->pseudo_palette; | |
603 | red >>= (16 - info->var.red.length); | |
604 | green >>= (16 - info->var.green.length); | |
605 | blue >>= (16 - info->var.blue.length); | |
606 | value = (red << info->var.red.offset) | | |
607 | (green << info->var.green.offset) | | |
608 | (blue << info->var.blue.offset); | |
9da12b6a RC |
609 | if (info->var.transp.length > 0) { |
610 | u32 mask = (1 << info->var.transp.length) - 1; | |
611 | mask <<= info->var.transp.offset; | |
612 | value |= mask; | |
613 | } | |
c850cb78 DA |
614 | palette[regno] = value; |
615 | return 0; | |
616 | } | |
617 | ||
04c0c569 VS |
618 | /* |
619 | * The driver really shouldn't advertise pseudo/directcolor | |
620 | * visuals if it can't deal with the palette. | |
621 | */ | |
622 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
623 | !fb_helper->funcs->gamma_get)) | |
624 | return -EINVAL; | |
625 | ||
b8c00ac5 DA |
626 | pindex = regno; |
627 | ||
628 | if (fb->bits_per_pixel == 16) { | |
629 | pindex = regno << 3; | |
630 | ||
631 | if (fb->depth == 16 && regno > 63) | |
c850cb78 | 632 | return -EINVAL; |
b8c00ac5 | 633 | if (fb->depth == 15 && regno > 31) |
c850cb78 | 634 | return -EINVAL; |
b8c00ac5 DA |
635 | |
636 | if (fb->depth == 16) { | |
637 | u16 r, g, b; | |
638 | int i; | |
639 | if (regno < 32) { | |
640 | for (i = 0; i < 8; i++) | |
641 | fb_helper->funcs->gamma_set(crtc, red, | |
642 | green, blue, pindex + i); | |
643 | } | |
644 | ||
645 | fb_helper->funcs->gamma_get(crtc, &r, | |
646 | &g, &b, | |
647 | pindex >> 1); | |
648 | ||
649 | for (i = 0; i < 4; i++) | |
650 | fb_helper->funcs->gamma_set(crtc, r, | |
651 | green, b, | |
652 | (pindex >> 1) + i); | |
653 | } | |
654 | } | |
655 | ||
656 | if (fb->depth != 16) | |
657 | fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); | |
c850cb78 | 658 | return 0; |
b8c00ac5 DA |
659 | } |
660 | ||
207fd329 DV |
661 | /** |
662 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap | |
663 | * @cmap: cmap to set | |
664 | * @info: fbdev registered by the helper | |
665 | */ | |
068143d3 DA |
666 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
667 | { | |
668 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 669 | struct drm_device *dev = fb_helper->dev; |
8be48d92 | 670 | struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
671 | u16 *red, *green, *blue, *transp; |
672 | struct drm_crtc *crtc; | |
062ac622 | 673 | int i, j, rc = 0; |
068143d3 DA |
674 | int start; |
675 | ||
8391a3d5 VS |
676 | drm_modeset_lock_all(dev); |
677 | if (!drm_fb_helper_is_bound(fb_helper)) { | |
678 | drm_modeset_unlock_all(dev); | |
679 | return -EBUSY; | |
680 | } | |
681 | ||
8be48d92 DA |
682 | for (i = 0; i < fb_helper->crtc_count; i++) { |
683 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
684 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
685 | |
686 | red = cmap->red; | |
687 | green = cmap->green; | |
688 | blue = cmap->blue; | |
689 | transp = cmap->transp; | |
690 | start = cmap->start; | |
691 | ||
062ac622 | 692 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
693 | u16 hred, hgreen, hblue, htransp = 0xffff; |
694 | ||
695 | hred = *red++; | |
696 | hgreen = *green++; | |
697 | hblue = *blue++; | |
698 | ||
699 | if (transp) | |
700 | htransp = *transp++; | |
701 | ||
c850cb78 DA |
702 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
703 | if (rc) | |
8391a3d5 | 704 | goto out; |
068143d3 | 705 | } |
04c0c569 VS |
706 | if (crtc_funcs->load_lut) |
707 | crtc_funcs->load_lut(crtc); | |
068143d3 | 708 | } |
8391a3d5 VS |
709 | out: |
710 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
711 | return rc; |
712 | } | |
713 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
714 | ||
207fd329 DV |
715 | /** |
716 | * drm_fb_helper_check_var - implementation for ->fb_check_var | |
717 | * @var: screeninfo to check | |
718 | * @info: fbdev registered by the helper | |
719 | */ | |
785b93ef DA |
720 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
721 | struct fb_info *info) | |
722 | { | |
723 | struct drm_fb_helper *fb_helper = info->par; | |
724 | struct drm_framebuffer *fb = fb_helper->fb; | |
725 | int depth; | |
726 | ||
f90ebd9e | 727 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
728 | return -EINVAL; |
729 | ||
730 | /* Need to resize the fb object !!! */ | |
62fb376e CW |
731 | if (var->bits_per_pixel > fb->bits_per_pixel || |
732 | var->xres > fb->width || var->yres > fb->height || | |
733 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
509c7d83 | 734 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
62fb376e CW |
735 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
736 | var->xres, var->yres, var->bits_per_pixel, | |
737 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 738 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
739 | return -EINVAL; |
740 | } | |
741 | ||
742 | switch (var->bits_per_pixel) { | |
743 | case 16: | |
744 | depth = (var->green.length == 6) ? 16 : 15; | |
745 | break; | |
746 | case 32: | |
747 | depth = (var->transp.length > 0) ? 32 : 24; | |
748 | break; | |
749 | default: | |
750 | depth = var->bits_per_pixel; | |
751 | break; | |
752 | } | |
753 | ||
754 | switch (depth) { | |
755 | case 8: | |
756 | var->red.offset = 0; | |
757 | var->green.offset = 0; | |
758 | var->blue.offset = 0; | |
759 | var->red.length = 8; | |
760 | var->green.length = 8; | |
761 | var->blue.length = 8; | |
762 | var->transp.length = 0; | |
763 | var->transp.offset = 0; | |
764 | break; | |
765 | case 15: | |
766 | var->red.offset = 10; | |
767 | var->green.offset = 5; | |
768 | var->blue.offset = 0; | |
769 | var->red.length = 5; | |
770 | var->green.length = 5; | |
771 | var->blue.length = 5; | |
772 | var->transp.length = 1; | |
773 | var->transp.offset = 15; | |
774 | break; | |
775 | case 16: | |
776 | var->red.offset = 11; | |
777 | var->green.offset = 5; | |
778 | var->blue.offset = 0; | |
779 | var->red.length = 5; | |
780 | var->green.length = 6; | |
781 | var->blue.length = 5; | |
782 | var->transp.length = 0; | |
783 | var->transp.offset = 0; | |
784 | break; | |
785 | case 24: | |
786 | var->red.offset = 16; | |
787 | var->green.offset = 8; | |
788 | var->blue.offset = 0; | |
789 | var->red.length = 8; | |
790 | var->green.length = 8; | |
791 | var->blue.length = 8; | |
792 | var->transp.length = 0; | |
793 | var->transp.offset = 0; | |
794 | break; | |
795 | case 32: | |
796 | var->red.offset = 16; | |
797 | var->green.offset = 8; | |
798 | var->blue.offset = 0; | |
799 | var->red.length = 8; | |
800 | var->green.length = 8; | |
801 | var->blue.length = 8; | |
802 | var->transp.length = 8; | |
803 | var->transp.offset = 24; | |
804 | break; | |
805 | default: | |
806 | return -EINVAL; | |
807 | } | |
808 | return 0; | |
809 | } | |
810 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
811 | ||
207fd329 DV |
812 | /** |
813 | * drm_fb_helper_set_par - implementation for ->fb_set_par | |
814 | * @info: fbdev registered by the helper | |
815 | * | |
816 | * This will let fbcon do the mode init and is called at initialization time by | |
817 | * the fbdev core when registering the driver, and later on through the hotplug | |
818 | * callback. | |
819 | */ | |
785b93ef DA |
820 | int drm_fb_helper_set_par(struct fb_info *info) |
821 | { | |
822 | struct drm_fb_helper *fb_helper = info->par; | |
823 | struct drm_device *dev = fb_helper->dev; | |
824 | struct fb_var_screeninfo *var = &info->var; | |
785b93ef | 825 | |
5349ef31 | 826 | if (var->pixclock != 0) { |
172e91f5 | 827 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
828 | return -EINVAL; |
829 | } | |
830 | ||
84849903 | 831 | drm_modeset_lock_all(dev); |
366d4807 | 832 | drm_fb_helper_restore_fbdev_mode(fb_helper); |
84849903 | 833 | drm_modeset_unlock_all(dev); |
4abe3520 DA |
834 | |
835 | if (fb_helper->delayed_hotplug) { | |
836 | fb_helper->delayed_hotplug = false; | |
eb1f8e4f | 837 | drm_fb_helper_hotplug_event(fb_helper); |
4abe3520 | 838 | } |
785b93ef DA |
839 | return 0; |
840 | } | |
841 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
842 | ||
207fd329 DV |
843 | /** |
844 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display | |
845 | * @var: updated screen information | |
846 | * @info: fbdev registered by the helper | |
847 | */ | |
785b93ef DA |
848 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
849 | struct fb_info *info) | |
850 | { | |
851 | struct drm_fb_helper *fb_helper = info->par; | |
852 | struct drm_device *dev = fb_helper->dev; | |
853 | struct drm_mode_set *modeset; | |
785b93ef DA |
854 | int ret = 0; |
855 | int i; | |
856 | ||
84849903 | 857 | drm_modeset_lock_all(dev); |
20c60c35 DV |
858 | if (!drm_fb_helper_is_bound(fb_helper)) { |
859 | drm_modeset_unlock_all(dev); | |
860 | return -EBUSY; | |
861 | } | |
862 | ||
8be48d92 | 863 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
864 | modeset = &fb_helper->crtc_info[i].mode_set; |
865 | ||
866 | modeset->x = var->xoffset; | |
867 | modeset->y = var->yoffset; | |
868 | ||
869 | if (modeset->num_connectors) { | |
2d13b679 | 870 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
871 | if (!ret) { |
872 | info->var.xoffset = var->xoffset; | |
873 | info->var.yoffset = var->yoffset; | |
874 | } | |
875 | } | |
876 | } | |
84849903 | 877 | drm_modeset_unlock_all(dev); |
785b93ef DA |
878 | return ret; |
879 | } | |
880 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
881 | ||
8acf658a | 882 | /* |
207fd329 DV |
883 | * Allocates the backing storage and sets up the fbdev info structure through |
884 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
885 | * notifier. | |
8acf658a | 886 | */ |
de1ace5b DV |
887 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
888 | int preferred_bpp) | |
785b93ef | 889 | { |
8acf658a | 890 | int ret = 0; |
785b93ef | 891 | int crtc_count = 0; |
4abe3520 | 892 | int i; |
785b93ef | 893 | struct fb_info *info; |
38651674 | 894 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 895 | int gamma_size = 0; |
38651674 DA |
896 | |
897 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
898 | sizes.surface_depth = 24; | |
899 | sizes.surface_bpp = 32; | |
900 | sizes.fb_width = (unsigned)-1; | |
901 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 902 | |
b8c00ac5 DA |
903 | /* if driver picks 8 or 16 by default use that |
904 | for both depth/bpp */ | |
96081cdf | 905 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 906 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 907 | |
785b93ef | 908 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
909 | for (i = 0; i < fb_helper->connector_count; i++) { |
910 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 911 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 912 | |
0b4c0f3f | 913 | cmdline_mode = &fb_helper_conn->cmdline_mode; |
d50ba256 DA |
914 | |
915 | if (cmdline_mode->bpp_specified) { | |
916 | switch (cmdline_mode->bpp) { | |
917 | case 8: | |
38651674 | 918 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
919 | break; |
920 | case 15: | |
38651674 DA |
921 | sizes.surface_depth = 15; |
922 | sizes.surface_bpp = 16; | |
d50ba256 DA |
923 | break; |
924 | case 16: | |
38651674 | 925 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
926 | break; |
927 | case 24: | |
38651674 | 928 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
929 | break; |
930 | case 32: | |
38651674 DA |
931 | sizes.surface_depth = 24; |
932 | sizes.surface_bpp = 32; | |
d50ba256 DA |
933 | break; |
934 | } | |
935 | break; | |
936 | } | |
937 | } | |
938 | ||
8be48d92 DA |
939 | crtc_count = 0; |
940 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
941 | struct drm_display_mode *desired_mode; | |
942 | desired_mode = fb_helper->crtc_info[i].desired_mode; | |
943 | ||
944 | if (desired_mode) { | |
945 | if (gamma_size == 0) | |
946 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
947 | if (desired_mode->hdisplay < sizes.fb_width) | |
948 | sizes.fb_width = desired_mode->hdisplay; | |
949 | if (desired_mode->vdisplay < sizes.fb_height) | |
950 | sizes.fb_height = desired_mode->vdisplay; | |
951 | if (desired_mode->hdisplay > sizes.surface_width) | |
952 | sizes.surface_width = desired_mode->hdisplay; | |
953 | if (desired_mode->vdisplay > sizes.surface_height) | |
954 | sizes.surface_height = desired_mode->vdisplay; | |
785b93ef DA |
955 | crtc_count++; |
956 | } | |
957 | } | |
958 | ||
38651674 | 959 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
960 | /* hmm everyone went away - assume VGA cable just fell out |
961 | and will come back later. */ | |
eb1f8e4f | 962 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
963 | sizes.fb_width = sizes.surface_width = 1024; |
964 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
965 | } |
966 | ||
38651674 | 967 | /* push down into drivers */ |
8acf658a DV |
968 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
969 | if (ret < 0) | |
970 | return ret; | |
785b93ef | 971 | |
38651674 | 972 | info = fb_helper->fbdev; |
785b93ef | 973 | |
7e53f3a4 DV |
974 | /* |
975 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
976 | * events, but at init time drm_setup_crtcs needs to be called before | |
977 | * the fb is allocated (since we need to figure out the desired size of | |
978 | * the fb before we can allocate it ...). Hence we need to fix things up | |
979 | * here again. | |
980 | */ | |
96081cdf | 981 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
982 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
983 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
984 | ||
785b93ef | 985 | |
8acf658a DV |
986 | info->var.pixclock = 0; |
987 | if (register_framebuffer(info) < 0) | |
988 | return -EINVAL; | |
38651674 | 989 | |
8acf658a DV |
990 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
991 | info->node, info->fix.id); | |
785b93ef DA |
992 | |
993 | /* Switch back to kernel console on panic */ | |
994 | /* multi card linked list maybe */ | |
995 | if (list_empty(&kernel_fb_helper_list)) { | |
d56b1b9d | 996 | dev_info(fb_helper->dev->dev, "registered panic notifier\n"); |
785b93ef DA |
997 | atomic_notifier_chain_register(&panic_notifier_list, |
998 | &paniced); | |
999 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
1000 | } | |
8acf658a DV |
1001 | |
1002 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
38651674 | 1003 | |
785b93ef DA |
1004 | return 0; |
1005 | } | |
785b93ef | 1006 | |
207fd329 DV |
1007 | /** |
1008 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1009 | * @info: fbdev registered by the helper | |
1010 | * @pitch: desired pitch | |
1011 | * @depth: desired depth | |
1012 | * | |
1013 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1014 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1015 | * additional constraints need to set up their own limits. | |
1016 | * | |
1017 | * Drivers should call this (or their equivalent setup code) from their | |
1018 | * ->fb_probe callback. | |
1019 | */ | |
3632ef89 DA |
1020 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1021 | uint32_t depth) | |
1022 | { | |
1023 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1024 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1025 | FB_VISUAL_TRUECOLOR; | |
1026 | info->fix.mmio_start = 0; | |
1027 | info->fix.mmio_len = 0; | |
1028 | info->fix.type_aux = 0; | |
1029 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1030 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1031 | info->fix.ywrapstep = 0; | |
1032 | info->fix.accel = FB_ACCEL_NONE; | |
1033 | info->fix.type_aux = 0; | |
1034 | ||
1035 | info->fix.line_length = pitch; | |
1036 | return; | |
1037 | } | |
1038 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1039 | ||
207fd329 DV |
1040 | /** |
1041 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1042 | * @info: fbdev instance to set up | |
1043 | * @fb_helper: fb helper instance to use as template | |
1044 | * @fb_width: desired fb width | |
1045 | * @fb_height: desired fb height | |
1046 | * | |
1047 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
1048 | * and the drm framebuffer allocated in fb_helper->fb. | |
1049 | * | |
1050 | * Drivers should call this (or their equivalent setup code) from their | |
1051 | * ->fb_probe callback after having allocated the fbdev backing | |
1052 | * storage framebuffer. | |
1053 | */ | |
38651674 | 1054 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1055 | uint32_t fb_width, uint32_t fb_height) |
1056 | { | |
38651674 DA |
1057 | struct drm_framebuffer *fb = fb_helper->fb; |
1058 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1059 | info->var.xres_virtual = fb->width; |
1060 | info->var.yres_virtual = fb->height; | |
1061 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 1062 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1063 | info->var.xoffset = 0; |
1064 | info->var.yoffset = 0; | |
1065 | info->var.activate = FB_ACTIVATE_NOW; | |
1066 | info->var.height = -1; | |
1067 | info->var.width = -1; | |
1068 | ||
1069 | switch (fb->depth) { | |
1070 | case 8: | |
1071 | info->var.red.offset = 0; | |
1072 | info->var.green.offset = 0; | |
1073 | info->var.blue.offset = 0; | |
1074 | info->var.red.length = 8; /* 8bit DAC */ | |
1075 | info->var.green.length = 8; | |
1076 | info->var.blue.length = 8; | |
1077 | info->var.transp.offset = 0; | |
1078 | info->var.transp.length = 0; | |
1079 | break; | |
1080 | case 15: | |
1081 | info->var.red.offset = 10; | |
1082 | info->var.green.offset = 5; | |
1083 | info->var.blue.offset = 0; | |
1084 | info->var.red.length = 5; | |
1085 | info->var.green.length = 5; | |
1086 | info->var.blue.length = 5; | |
1087 | info->var.transp.offset = 15; | |
1088 | info->var.transp.length = 1; | |
1089 | break; | |
1090 | case 16: | |
1091 | info->var.red.offset = 11; | |
1092 | info->var.green.offset = 5; | |
1093 | info->var.blue.offset = 0; | |
1094 | info->var.red.length = 5; | |
1095 | info->var.green.length = 6; | |
1096 | info->var.blue.length = 5; | |
1097 | info->var.transp.offset = 0; | |
1098 | break; | |
1099 | case 24: | |
1100 | info->var.red.offset = 16; | |
1101 | info->var.green.offset = 8; | |
1102 | info->var.blue.offset = 0; | |
1103 | info->var.red.length = 8; | |
1104 | info->var.green.length = 8; | |
1105 | info->var.blue.length = 8; | |
1106 | info->var.transp.offset = 0; | |
1107 | info->var.transp.length = 0; | |
1108 | break; | |
1109 | case 32: | |
1110 | info->var.red.offset = 16; | |
1111 | info->var.green.offset = 8; | |
1112 | info->var.blue.offset = 0; | |
1113 | info->var.red.length = 8; | |
1114 | info->var.green.length = 8; | |
1115 | info->var.blue.length = 8; | |
1116 | info->var.transp.offset = 24; | |
1117 | info->var.transp.length = 8; | |
1118 | break; | |
1119 | default: | |
1120 | break; | |
1121 | } | |
1122 | ||
1123 | info->var.xres = fb_width; | |
1124 | info->var.yres = fb_height; | |
1125 | } | |
1126 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1127 | |
0b4c0f3f DA |
1128 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1129 | uint32_t maxX, | |
1130 | uint32_t maxY) | |
38651674 DA |
1131 | { |
1132 | struct drm_connector *connector; | |
1133 | int count = 0; | |
0b4c0f3f | 1134 | int i; |
38651674 | 1135 | |
0b4c0f3f DA |
1136 | for (i = 0; i < fb_helper->connector_count; i++) { |
1137 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1138 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1139 | } | |
1140 | ||
1141 | return count; | |
1142 | } | |
1143 | ||
2f1046f3 | 1144 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1145 | { |
1146 | struct drm_display_mode *mode; | |
1147 | ||
0b4c0f3f | 1148 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1149 | if (mode->hdisplay > width || |
1150 | mode->vdisplay > height) | |
38651674 DA |
1151 | continue; |
1152 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1153 | return mode; | |
1154 | } | |
1155 | return NULL; | |
1156 | } | |
2f1046f3 | 1157 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1158 | |
0b4c0f3f | 1159 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1160 | { |
1794d257 | 1161 | struct drm_cmdline_mode *cmdline_mode; |
0b4c0f3f | 1162 | cmdline_mode = &fb_connector->cmdline_mode; |
38651674 DA |
1163 | return cmdline_mode->specified; |
1164 | } | |
1165 | ||
2f1046f3 | 1166 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
0b4c0f3f | 1167 | int width, int height) |
38651674 | 1168 | { |
1794d257 | 1169 | struct drm_cmdline_mode *cmdline_mode; |
38651674 | 1170 | struct drm_display_mode *mode = NULL; |
c683f427 | 1171 | bool prefer_non_interlace; |
38651674 | 1172 | |
0b4c0f3f | 1173 | cmdline_mode = &fb_helper_conn->cmdline_mode; |
38651674 DA |
1174 | if (cmdline_mode->specified == false) |
1175 | return mode; | |
1176 | ||
1177 | /* attempt to find a matching mode in the list of modes | |
1178 | * we have gotten so far, if not add a CVT mode that conforms | |
1179 | */ | |
1180 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1181 | goto create_mode; | |
1182 | ||
c683f427 TI |
1183 | prefer_non_interlace = !cmdline_mode->interlace; |
1184 | again: | |
0b4c0f3f | 1185 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1186 | /* check width/height */ |
1187 | if (mode->hdisplay != cmdline_mode->xres || | |
1188 | mode->vdisplay != cmdline_mode->yres) | |
1189 | continue; | |
1190 | ||
1191 | if (cmdline_mode->refresh_specified) { | |
1192 | if (mode->vrefresh != cmdline_mode->refresh) | |
1193 | continue; | |
1194 | } | |
1195 | ||
1196 | if (cmdline_mode->interlace) { | |
1197 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1198 | continue; | |
c683f427 TI |
1199 | } else if (prefer_non_interlace) { |
1200 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1201 | continue; | |
38651674 DA |
1202 | } |
1203 | return mode; | |
1204 | } | |
1205 | ||
c683f427 TI |
1206 | if (prefer_non_interlace) { |
1207 | prefer_non_interlace = false; | |
1208 | goto again; | |
1209 | } | |
1210 | ||
38651674 | 1211 | create_mode: |
1794d257 CW |
1212 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1213 | cmdline_mode); | |
0b4c0f3f | 1214 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1215 | return mode; |
1216 | } | |
2f1046f3 | 1217 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1218 | |
1219 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1220 | { | |
1221 | bool enable; | |
1222 | ||
96081cdf | 1223 | if (strict) |
38651674 | 1224 | enable = connector->status == connector_status_connected; |
96081cdf | 1225 | else |
38651674 | 1226 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1227 | |
38651674 DA |
1228 | return enable; |
1229 | } | |
1230 | ||
0b4c0f3f DA |
1231 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1232 | bool *enabled) | |
38651674 DA |
1233 | { |
1234 | bool any_enabled = false; | |
1235 | struct drm_connector *connector; | |
1236 | int i = 0; | |
1237 | ||
0b4c0f3f DA |
1238 | for (i = 0; i < fb_helper->connector_count; i++) { |
1239 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1240 | enabled[i] = drm_connector_enabled(connector, true); |
1241 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1242 | enabled[i] ? "yes" : "no"); | |
1243 | any_enabled |= enabled[i]; | |
38651674 DA |
1244 | } |
1245 | ||
1246 | if (any_enabled) | |
1247 | return; | |
1248 | ||
0b4c0f3f DA |
1249 | for (i = 0; i < fb_helper->connector_count; i++) { |
1250 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1251 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1252 | } |
1253 | } | |
1254 | ||
1d42bbc8 DA |
1255 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1256 | struct drm_display_mode **modes, | |
1257 | bool *enabled, int width, int height) | |
1258 | { | |
1259 | int count, i, j; | |
1260 | bool can_clone = false; | |
1261 | struct drm_fb_helper_connector *fb_helper_conn; | |
1262 | struct drm_display_mode *dmt_mode, *mode; | |
1263 | ||
1264 | /* only contemplate cloning in the single crtc case */ | |
1265 | if (fb_helper->crtc_count > 1) | |
1266 | return false; | |
1267 | ||
1268 | count = 0; | |
1269 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1270 | if (enabled[i]) | |
1271 | count++; | |
1272 | } | |
1273 | ||
1274 | /* only contemplate cloning if more than one connector is enabled */ | |
1275 | if (count <= 1) | |
1276 | return false; | |
1277 | ||
1278 | /* check the command line or if nothing common pick 1024x768 */ | |
1279 | can_clone = true; | |
1280 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1281 | if (!enabled[i]) | |
1282 | continue; | |
1283 | fb_helper_conn = fb_helper->connector_info[i]; | |
1284 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1285 | if (!modes[i]) { | |
1286 | can_clone = false; | |
1287 | break; | |
1288 | } | |
1289 | for (j = 0; j < i; j++) { | |
1290 | if (!enabled[j]) | |
1291 | continue; | |
1292 | if (!drm_mode_equal(modes[j], modes[i])) | |
1293 | can_clone = false; | |
1294 | } | |
1295 | } | |
1296 | ||
1297 | if (can_clone) { | |
1298 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1299 | return true; | |
1300 | } | |
1301 | ||
1302 | /* try and find a 1024x768 mode on each connector */ | |
1303 | can_clone = true; | |
f6e252ba | 1304 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1305 | |
1306 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1307 | ||
1308 | if (!enabled[i]) | |
1309 | continue; | |
1310 | ||
1311 | fb_helper_conn = fb_helper->connector_info[i]; | |
1312 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1313 | if (drm_mode_equal(mode, dmt_mode)) | |
1314 | modes[i] = mode; | |
1315 | } | |
1316 | if (!modes[i]) | |
1317 | can_clone = false; | |
1318 | } | |
1319 | ||
1320 | if (can_clone) { | |
1321 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1322 | return true; | |
1323 | } | |
1324 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1325 | return false; | |
1326 | } | |
1327 | ||
0b4c0f3f | 1328 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 DA |
1329 | struct drm_display_mode **modes, |
1330 | bool *enabled, int width, int height) | |
1331 | { | |
0b4c0f3f DA |
1332 | struct drm_fb_helper_connector *fb_helper_conn; |
1333 | int i; | |
38651674 | 1334 | |
0b4c0f3f DA |
1335 | for (i = 0; i < fb_helper->connector_count; i++) { |
1336 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1337 | |
0b4c0f3f | 1338 | if (enabled[i] == false) |
38651674 | 1339 | continue; |
38651674 DA |
1340 | |
1341 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", | |
0b4c0f3f | 1342 | fb_helper_conn->connector->base.id); |
38651674 DA |
1343 | |
1344 | /* got for command line mode first */ | |
0b4c0f3f | 1345 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 DA |
1346 | if (!modes[i]) { |
1347 | DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", | |
0b4c0f3f DA |
1348 | fb_helper_conn->connector->base.id); |
1349 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); | |
38651674 DA |
1350 | } |
1351 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
1352 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
1353 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
1354 | break; |
1355 | } | |
1356 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
1357 | "none"); | |
38651674 DA |
1358 | } |
1359 | return true; | |
1360 | } | |
1361 | ||
8be48d92 DA |
1362 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
1363 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
1364 | struct drm_display_mode **modes, |
1365 | int n, int width, int height) | |
1366 | { | |
1367 | int c, o; | |
8be48d92 | 1368 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
1369 | struct drm_connector *connector; |
1370 | struct drm_connector_helper_funcs *connector_funcs; | |
1371 | struct drm_encoder *encoder; | |
38651674 | 1372 | int my_score, best_score, score; |
8be48d92 | 1373 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 1374 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 1375 | |
0b4c0f3f | 1376 | if (n == fb_helper->connector_count) |
38651674 | 1377 | return 0; |
0b4c0f3f DA |
1378 | |
1379 | fb_helper_conn = fb_helper->connector_info[n]; | |
1380 | connector = fb_helper_conn->connector; | |
38651674 DA |
1381 | |
1382 | best_crtcs[n] = NULL; | |
8be48d92 | 1383 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
1384 | if (modes[n] == NULL) |
1385 | return best_score; | |
1386 | ||
8be48d92 DA |
1387 | crtcs = kzalloc(dev->mode_config.num_connector * |
1388 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); | |
38651674 DA |
1389 | if (!crtcs) |
1390 | return best_score; | |
1391 | ||
1392 | my_score = 1; | |
1393 | if (connector->status == connector_status_connected) | |
1394 | my_score++; | |
0b4c0f3f | 1395 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 1396 | my_score++; |
0b4c0f3f | 1397 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
1398 | my_score++; |
1399 | ||
1400 | connector_funcs = connector->helper_private; | |
1401 | encoder = connector_funcs->best_encoder(connector); | |
1402 | if (!encoder) | |
1403 | goto out; | |
1404 | ||
38651674 DA |
1405 | /* select a crtc for this connector and then attempt to configure |
1406 | remaining connectors */ | |
8be48d92 DA |
1407 | for (c = 0; c < fb_helper->crtc_count; c++) { |
1408 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 1409 | |
96081cdf | 1410 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 1411 | continue; |
38651674 DA |
1412 | |
1413 | for (o = 0; o < n; o++) | |
1414 | if (best_crtcs[o] == crtc) | |
1415 | break; | |
1416 | ||
1417 | if (o < n) { | |
1d42bbc8 DA |
1418 | /* ignore cloning unless only a single crtc */ |
1419 | if (fb_helper->crtc_count > 1) | |
1420 | continue; | |
1421 | ||
1422 | if (!drm_mode_equal(modes[o], modes[n])) | |
1423 | continue; | |
38651674 DA |
1424 | } |
1425 | ||
1426 | crtcs[n] = crtc; | |
8be48d92 DA |
1427 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
1428 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
1429 | width, height); |
1430 | if (score > best_score) { | |
38651674 DA |
1431 | best_score = score; |
1432 | memcpy(best_crtcs, crtcs, | |
1433 | dev->mode_config.num_connector * | |
8be48d92 | 1434 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 1435 | } |
38651674 DA |
1436 | } |
1437 | out: | |
1438 | kfree(crtcs); | |
1439 | return best_score; | |
1440 | } | |
1441 | ||
8be48d92 | 1442 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 1443 | { |
8be48d92 DA |
1444 | struct drm_device *dev = fb_helper->dev; |
1445 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 1446 | struct drm_display_mode **modes; |
8be48d92 | 1447 | struct drm_mode_set *modeset; |
38651674 DA |
1448 | bool *enabled; |
1449 | int width, height; | |
11e17a08 | 1450 | int i; |
38651674 DA |
1451 | |
1452 | DRM_DEBUG_KMS("\n"); | |
1453 | ||
1454 | width = dev->mode_config.max_width; | |
1455 | height = dev->mode_config.max_height; | |
1456 | ||
38651674 | 1457 | crtcs = kcalloc(dev->mode_config.num_connector, |
8be48d92 | 1458 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
1459 | modes = kcalloc(dev->mode_config.num_connector, |
1460 | sizeof(struct drm_display_mode *), GFP_KERNEL); | |
1461 | enabled = kcalloc(dev->mode_config.num_connector, | |
1462 | sizeof(bool), GFP_KERNEL); | |
8c5eaca0 SK |
1463 | if (!crtcs || !modes || !enabled) { |
1464 | DRM_ERROR("Memory allocation failed\n"); | |
1465 | goto out; | |
1466 | } | |
1467 | ||
38651674 | 1468 | |
0b4c0f3f | 1469 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 1470 | |
11e17a08 JB |
1471 | if (!(fb_helper->funcs->initial_config && |
1472 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
1473 | enabled, width, height))) { | |
1474 | memset(modes, 0, dev->mode_config.num_connector*sizeof(modes[0])); | |
1475 | memset(crtcs, 0, dev->mode_config.num_connector*sizeof(crtcs[0])); | |
1476 | ||
1477 | if (!drm_target_cloned(fb_helper, | |
1478 | modes, enabled, width, height) && | |
1479 | !drm_target_preferred(fb_helper, | |
1480 | modes, enabled, width, height)) | |
1d42bbc8 | 1481 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 1482 | |
11e17a08 JB |
1483 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
1484 | width, height); | |
38651674 | 1485 | |
11e17a08 JB |
1486 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
1487 | } | |
8be48d92 DA |
1488 | |
1489 | /* need to set the modesets up here for use later */ | |
1490 | /* fill out the connector<->crtc mappings into the modesets */ | |
1491 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1492 | modeset = &fb_helper->crtc_info[i].mode_set; | |
1493 | modeset->num_connectors = 0; | |
7e53f3a4 | 1494 | modeset->fb = NULL; |
8be48d92 | 1495 | } |
38651674 | 1496 | |
0b4c0f3f | 1497 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 1498 | struct drm_display_mode *mode = modes[i]; |
8be48d92 DA |
1499 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
1500 | modeset = &fb_crtc->mode_set; | |
38651674 | 1501 | |
8be48d92 | 1502 | if (mode && fb_crtc) { |
38651674 | 1503 | DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", |
8be48d92 DA |
1504 | mode->name, fb_crtc->mode_set.crtc->base.id); |
1505 | fb_crtc->desired_mode = mode; | |
1506 | if (modeset->mode) | |
1507 | drm_mode_destroy(dev, modeset->mode); | |
1508 | modeset->mode = drm_mode_duplicate(dev, | |
1509 | fb_crtc->desired_mode); | |
0b4c0f3f | 1510 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
7e53f3a4 | 1511 | modeset->fb = fb_helper->fb; |
38651674 | 1512 | } |
38651674 DA |
1513 | } |
1514 | ||
7e53f3a4 DV |
1515 | /* Clear out any old modes if there are no more connected outputs. */ |
1516 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1517 | modeset = &fb_helper->crtc_info[i].mode_set; | |
1518 | if (modeset->num_connectors == 0) { | |
1519 | BUG_ON(modeset->fb); | |
1520 | BUG_ON(modeset->num_connectors); | |
1521 | if (modeset->mode) | |
1522 | drm_mode_destroy(dev, modeset->mode); | |
1523 | modeset->mode = NULL; | |
1524 | } | |
1525 | } | |
8c5eaca0 | 1526 | out: |
38651674 DA |
1527 | kfree(crtcs); |
1528 | kfree(modes); | |
1529 | kfree(enabled); | |
1530 | } | |
1531 | ||
1532 | /** | |
207fd329 | 1533 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
1534 | * @fb_helper: fb_helper device struct |
1535 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 1536 | * |
d0ddc033 | 1537 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
1538 | * At the moment, this is a cloned configuration across all heads with |
1539 | * a new framebuffer object as the backing store. | |
1540 | * | |
207fd329 DV |
1541 | * Note that this also registers the fbdev and so allows userspace to call into |
1542 | * the driver through the fbdev interfaces. | |
1543 | * | |
1544 | * This function will call down into the ->fb_probe callback to let | |
1545 | * the driver allocate and initialize the fbdev info structure and the drm | |
1546 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
1547 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default | |
1548 | * values for the fbdev info structure. | |
1549 | * | |
38651674 DA |
1550 | * RETURNS: |
1551 | * Zero if everything went ok, nonzero otherwise. | |
1552 | */ | |
4abe3520 | 1553 | bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 1554 | { |
8be48d92 | 1555 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
1556 | int count = 0; |
1557 | ||
0b4c0f3f | 1558 | drm_fb_helper_parse_command_line(fb_helper); |
38651674 | 1559 | |
53f1904b | 1560 | mutex_lock(&dev->mode_config.mutex); |
0b4c0f3f DA |
1561 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
1562 | dev->mode_config.max_width, | |
1563 | dev->mode_config.max_height); | |
53f1904b | 1564 | mutex_unlock(&dev->mode_config.mutex); |
38651674 DA |
1565 | /* |
1566 | * we shouldn't end up with no modes here. | |
1567 | */ | |
96081cdf | 1568 | if (count == 0) |
d56b1b9d | 1569 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 1570 | |
8be48d92 | 1571 | drm_setup_crtcs(fb_helper); |
38651674 | 1572 | |
4abe3520 | 1573 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 1574 | } |
8be48d92 | 1575 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 1576 | |
7394371d CW |
1577 | /** |
1578 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 1579 | * probing all the outputs attached to the fb |
7394371d CW |
1580 | * @fb_helper: the drm_fb_helper |
1581 | * | |
7394371d CW |
1582 | * Scan the connectors attached to the fb_helper and try to put together a |
1583 | * setup after *notification of a change in output configuration. | |
1584 | * | |
207fd329 DV |
1585 | * Called at runtime, takes the mode config locks to be able to check/change the |
1586 | * modeset configuration. Must be run from process context (which usually means | |
1587 | * either the output polling work or a work item launched from the driver's | |
1588 | * hotplug interrupt). | |
1589 | * | |
1590 | * Note that the driver must ensure that this is only called _after_ the fb has | |
1591 | * been fully set up, i.e. after the call to drm_fb_helper_initial_config. | |
1592 | * | |
7394371d CW |
1593 | * RETURNS: |
1594 | * 0 on success and a non-zero error code otherwise. | |
1595 | */ | |
1596 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 1597 | { |
7394371d | 1598 | struct drm_device *dev = fb_helper->dev; |
51bbd276 | 1599 | u32 max_width, max_height; |
5c4426a7 | 1600 | |
eb1f8e4f | 1601 | if (!fb_helper->fb) |
7394371d | 1602 | return 0; |
4abe3520 | 1603 | |
89ced125 | 1604 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
20c60c35 | 1605 | if (!drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 1606 | fb_helper->delayed_hotplug = true; |
89ced125 | 1607 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
7394371d | 1608 | return 0; |
4abe3520 | 1609 | } |
eb1f8e4f | 1610 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 1611 | |
eb1f8e4f DA |
1612 | max_width = fb_helper->fb->width; |
1613 | max_height = fb_helper->fb->height; | |
5c4426a7 | 1614 | |
51bbd276 | 1615 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
89ced125 DV |
1616 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
1617 | ||
1618 | drm_modeset_lock_all(dev); | |
eb1f8e4f | 1619 | drm_setup_crtcs(fb_helper); |
84849903 | 1620 | drm_modeset_unlock_all(dev); |
2180c3c7 DV |
1621 | drm_fb_helper_set_par(fb_helper->fbdev); |
1622 | ||
1623 | return 0; | |
5c4426a7 | 1624 | } |
eb1f8e4f | 1625 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 1626 | |
6a108a14 | 1627 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
1628 | * but the module doesn't depend on any fb console symbols. At least |
1629 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
1630 | */ | |
6a108a14 | 1631 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
1632 | static int __init drm_fb_helper_modinit(void) |
1633 | { | |
1634 | const char *name = "fbcon"; | |
1635 | struct module *fbcon; | |
1636 | ||
1637 | mutex_lock(&module_mutex); | |
1638 | fbcon = find_module(name); | |
1639 | mutex_unlock(&module_mutex); | |
1640 | ||
1641 | if (!fbcon) | |
1642 | request_module_nowait(name); | |
1643 | return 0; | |
1644 | } | |
1645 | ||
1646 | module_init(drm_fb_helper_modinit); | |
1647 | #endif |