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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 | 51 | * |
10a23102 TR |
52 | * Initialization is done as a four-step process with drm_fb_helper_prepare(), |
53 | * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and | |
54 | * drm_fb_helper_initial_config(). Drivers with fancier requirements than the | |
55 | * default behaviour can override the third step with their own code. | |
56 | * Teardown is done with drm_fb_helper_fini(). | |
207fd329 DV |
57 | * |
58 | * At runtime drivers should restore the fbdev console by calling | |
59 | * drm_fb_helper_restore_fbdev_mode() from their ->lastclose callback. They | |
60 | * should also notify the fb helper code from updates to the output | |
61 | * configuration by calling drm_fb_helper_hotplug_event(). For easier | |
62 | * integration with the output polling code in drm_crtc_helper.c the modeset | |
83c617c5 | 63 | * code provides a ->output_poll_changed callback. |
207fd329 DV |
64 | * |
65 | * All other functions exported by the fb helper library can be used to | |
66 | * implement the fbdev driver interface by the driver. | |
10a23102 TR |
67 | * |
68 | * It is possible, though perhaps somewhat tricky, to implement race-free | |
69 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() | |
70 | * helper must be called first to initialize the minimum required to make | |
71 | * hotplug detection work. Drivers also need to make sure to properly set up | |
72 | * the dev->mode_config.funcs member. After calling drm_kms_helper_poll_init() | |
73 | * it is safe to enable interrupts and start processing hotplug events. At the | |
74 | * same time, drivers should initialize all modeset objects such as CRTCs, | |
75 | * encoders and connectors. To finish up the fbdev helper initialization, the | |
76 | * drm_fb_helper_init() function is called. To probe for all attached displays | |
77 | * and set up an initial configuration using the detected hardware, drivers | |
78 | * should call drm_fb_helper_single_add_all_connectors() followed by | |
79 | * drm_fb_helper_initial_config(). | |
d0ddc033 DV |
80 | */ |
81 | ||
207fd329 DV |
82 | /** |
83 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
84 | * emulation helper | |
85 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
86 | * | |
87 | * This functions adds all the available connectors for use with the given | |
88 | * fb_helper. This is a separate step to allow drivers to freely assign | |
89 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
90 | * not adequate to be used for the fbcon. | |
91 | * | |
92 | * Since this is part of the initial setup before the fbdev is published, no | |
93 | * locking is required. | |
94 | */ | |
0b4c0f3f | 95 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 96 | { |
0b4c0f3f DA |
97 | struct drm_device *dev = fb_helper->dev; |
98 | struct drm_connector *connector; | |
99 | int i; | |
d50ba256 | 100 | |
0b4c0f3f DA |
101 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
102 | struct drm_fb_helper_connector *fb_helper_connector; | |
103 | ||
104 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
105 | if (!fb_helper_connector) | |
106 | goto fail; | |
d50ba256 | 107 | |
0b4c0f3f DA |
108 | fb_helper_connector->connector = connector; |
109 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
110 | } | |
d50ba256 | 111 | return 0; |
0b4c0f3f DA |
112 | fail: |
113 | for (i = 0; i < fb_helper->connector_count; i++) { | |
114 | kfree(fb_helper->connector_info[i]); | |
115 | fb_helper->connector_info[i] = NULL; | |
116 | } | |
117 | fb_helper->connector_count = 0; | |
118 | return -ENOMEM; | |
d50ba256 | 119 | } |
0b4c0f3f | 120 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 121 | |
0b4c0f3f | 122 | static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper) |
d50ba256 | 123 | { |
0b4c0f3f DA |
124 | struct drm_fb_helper_connector *fb_helper_conn; |
125 | int i; | |
d50ba256 | 126 | |
0b4c0f3f | 127 | for (i = 0; i < fb_helper->connector_count; i++) { |
1794d257 CW |
128 | struct drm_cmdline_mode *mode; |
129 | struct drm_connector *connector; | |
d50ba256 DA |
130 | char *option = NULL; |
131 | ||
0b4c0f3f | 132 | fb_helper_conn = fb_helper->connector_info[i]; |
1794d257 CW |
133 | connector = fb_helper_conn->connector; |
134 | mode = &fb_helper_conn->cmdline_mode; | |
0b4c0f3f | 135 | |
d50ba256 | 136 | /* do something on return - turn off connector maybe */ |
25933820 | 137 | if (fb_get_options(connector->name, &option)) |
d50ba256 DA |
138 | continue; |
139 | ||
1794d257 CW |
140 | if (drm_mode_parse_command_line_for_connector(option, |
141 | connector, | |
142 | mode)) { | |
143 | if (mode->force) { | |
144 | const char *s; | |
145 | switch (mode->force) { | |
6c91083f SK |
146 | case DRM_FORCE_OFF: |
147 | s = "OFF"; | |
148 | break; | |
149 | case DRM_FORCE_ON_DIGITAL: | |
150 | s = "ON - dig"; | |
151 | break; | |
1794d257 | 152 | default: |
6c91083f SK |
153 | case DRM_FORCE_ON: |
154 | s = "ON"; | |
155 | break; | |
1794d257 CW |
156 | } |
157 | ||
158 | DRM_INFO("forcing %s connector %s\n", | |
25933820 | 159 | connector->name, s); |
1794d257 CW |
160 | connector->force = mode->force; |
161 | } | |
162 | ||
163 | DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", | |
25933820 | 164 | connector->name, |
1794d257 CW |
165 | mode->xres, mode->yres, |
166 | mode->refresh_specified ? mode->refresh : 60, | |
167 | mode->rb ? " reduced blanking" : "", | |
168 | mode->margins ? " with margins" : "", | |
169 | mode->interlace ? " interlaced" : ""); | |
170 | } | |
171 | ||
d50ba256 DA |
172 | } |
173 | return 0; | |
174 | } | |
175 | ||
99231028 JW |
176 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
177 | { | |
178 | uint16_t *r_base, *g_base, *b_base; | |
179 | int i; | |
180 | ||
04c0c569 VS |
181 | if (helper->funcs->gamma_get == NULL) |
182 | return; | |
183 | ||
99231028 JW |
184 | r_base = crtc->gamma_store; |
185 | g_base = r_base + crtc->gamma_size; | |
186 | b_base = g_base + crtc->gamma_size; | |
187 | ||
188 | for (i = 0; i < crtc->gamma_size; i++) | |
189 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
190 | } | |
191 | ||
192 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
193 | { | |
194 | uint16_t *r_base, *g_base, *b_base; | |
195 | ||
ebe0f244 LP |
196 | if (crtc->funcs->gamma_set == NULL) |
197 | return; | |
198 | ||
99231028 JW |
199 | r_base = crtc->gamma_store; |
200 | g_base = r_base + crtc->gamma_size; | |
201 | b_base = g_base + crtc->gamma_size; | |
202 | ||
203 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); | |
204 | } | |
205 | ||
207fd329 DV |
206 | /** |
207 | * drm_fb_helper_debug_enter - implementation for ->fb_debug_enter | |
208 | * @info: fbdev registered by the helper | |
209 | */ | |
1a7aba7f JB |
210 | int drm_fb_helper_debug_enter(struct fb_info *info) |
211 | { | |
212 | struct drm_fb_helper *helper = info->par; | |
213 | struct drm_crtc_helper_funcs *funcs; | |
214 | int i; | |
215 | ||
1a7aba7f JB |
216 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
217 | for (i = 0; i < helper->crtc_count; i++) { | |
218 | struct drm_mode_set *mode_set = | |
219 | &helper->crtc_info[i].mode_set; | |
220 | ||
221 | if (!mode_set->crtc->enabled) | |
222 | continue; | |
223 | ||
224 | funcs = mode_set->crtc->helper_private; | |
99231028 | 225 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
226 | funcs->mode_set_base_atomic(mode_set->crtc, |
227 | mode_set->fb, | |
228 | mode_set->x, | |
413d45d3 | 229 | mode_set->y, |
21c74a8e | 230 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
231 | } |
232 | } | |
233 | ||
234 | return 0; | |
235 | } | |
236 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
237 | ||
238 | /* Find the real fb for a given fb helper CRTC */ | |
239 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
240 | { | |
241 | struct drm_device *dev = crtc->dev; | |
242 | struct drm_crtc *c; | |
243 | ||
244 | list_for_each_entry(c, &dev->mode_config.crtc_list, head) { | |
245 | if (crtc->base.id == c->base.id) | |
f4510a27 | 246 | return c->primary->fb; |
1a7aba7f JB |
247 | } |
248 | ||
249 | return NULL; | |
250 | } | |
251 | ||
207fd329 DV |
252 | /** |
253 | * drm_fb_helper_debug_leave - implementation for ->fb_debug_leave | |
254 | * @info: fbdev registered by the helper | |
255 | */ | |
1a7aba7f JB |
256 | int drm_fb_helper_debug_leave(struct fb_info *info) |
257 | { | |
258 | struct drm_fb_helper *helper = info->par; | |
259 | struct drm_crtc *crtc; | |
260 | struct drm_crtc_helper_funcs *funcs; | |
261 | struct drm_framebuffer *fb; | |
262 | int i; | |
263 | ||
264 | for (i = 0; i < helper->crtc_count; i++) { | |
265 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
266 | crtc = mode_set->crtc; | |
267 | funcs = crtc->helper_private; | |
268 | fb = drm_mode_config_fb(crtc); | |
269 | ||
270 | if (!crtc->enabled) | |
271 | continue; | |
272 | ||
273 | if (!fb) { | |
274 | DRM_ERROR("no fb to restore??\n"); | |
275 | continue; | |
276 | } | |
277 | ||
99231028 | 278 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 279 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 280 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
281 | } |
282 | ||
283 | return 0; | |
284 | } | |
285 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
286 | ||
5ea1f752 | 287 | static bool restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 288 | { |
3858bc5d VS |
289 | struct drm_device *dev = fb_helper->dev; |
290 | struct drm_plane *plane; | |
e8e7a2b8 | 291 | bool error = false; |
3858bc5d VS |
292 | int i; |
293 | ||
294 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 295 | |
3858bc5d | 296 | list_for_each_entry(plane, &dev->mode_config.plane_list, head) |
e27dde3e MR |
297 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
298 | drm_plane_force_disable(plane); | |
6aed8ec3 | 299 | |
e8e7a2b8 DA |
300 | for (i = 0; i < fb_helper->crtc_count; i++) { |
301 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
302 | struct drm_crtc *crtc = mode_set->crtc; |
303 | int ret; | |
304 | ||
305 | if (crtc->funcs->cursor_set) { | |
306 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); | |
307 | if (ret) | |
308 | error = true; | |
309 | } | |
310 | ||
2d13b679 | 311 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 DA |
312 | if (ret) |
313 | error = true; | |
314 | } | |
315 | return error; | |
316 | } | |
5ea1f752 RC |
317 | /** |
318 | * drm_fb_helper_restore_fbdev_mode - restore fbdev configuration | |
319 | * @fb_helper: fbcon to restore | |
320 | * | |
321 | * This should be called from driver's drm ->lastclose callback | |
322 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
323 | * the user isn't greeted with a black screen when e.g. X dies. | |
324 | * | |
325 | * Use this variant if you need to bypass locking (panic), or already | |
326 | * hold all modeset locks. Otherwise use drm_fb_helper_restore_fbdev_mode_unlocked() | |
327 | */ | |
328 | static bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) | |
329 | { | |
330 | return restore_fbdev_mode(fb_helper); | |
331 | } | |
332 | ||
333 | /** | |
334 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
335 | * @fb_helper: fbcon to restore | |
336 | * | |
337 | * This should be called from driver's drm ->lastclose callback | |
338 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
339 | * the user isn't greeted with a black screen when e.g. X dies. | |
340 | */ | |
341 | bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) | |
342 | { | |
343 | struct drm_device *dev = fb_helper->dev; | |
344 | bool ret; | |
345 | drm_modeset_lock_all(dev); | |
346 | ret = restore_fbdev_mode(fb_helper); | |
347 | drm_modeset_unlock_all(dev); | |
348 | return ret; | |
349 | } | |
350 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 351 | |
d21bf469 DV |
352 | /* |
353 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
354 | * and panic handling. | |
355 | */ | |
78b9c353 | 356 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 357 | { |
785b93ef DA |
358 | bool ret, error = false; |
359 | struct drm_fb_helper *helper; | |
360 | ||
361 | if (list_empty(&kernel_fb_helper_list)) | |
362 | return false; | |
363 | ||
364 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
365 | struct drm_device *dev = helper->dev; |
366 | ||
367 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
368 | continue; | |
369 | ||
51fd371b RC |
370 | /* NOTE: we use lockless flag below to avoid grabbing other |
371 | * modeset locks. So just trylock the underlying mutex | |
372 | * directly: | |
373 | */ | |
b77f0765 TR |
374 | if (!mutex_trylock(&dev->mode_config.mutex)) { |
375 | error = true; | |
e8e7a2b8 | 376 | continue; |
b77f0765 | 377 | } |
e8e7a2b8 DA |
378 | |
379 | ret = drm_fb_helper_restore_fbdev_mode(helper); | |
380 | if (ret) | |
381 | error = true; | |
b77f0765 TR |
382 | |
383 | mutex_unlock(&dev->mode_config.mutex); | |
785b93ef DA |
384 | } |
385 | return error; | |
386 | } | |
387 | ||
43c8a849 | 388 | static int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, |
785b93ef DA |
389 | void *panic_str) |
390 | { | |
d68752cf HD |
391 | /* |
392 | * It's a waste of time and effort to switch back to text console | |
393 | * if the kernel should reboot before panic messages can be seen. | |
394 | */ | |
395 | if (panic_timeout < 0) | |
396 | return 0; | |
397 | ||
d56b1b9d | 398 | pr_err("panic occurred, switching back to text console\n"); |
785b93ef | 399 | return drm_fb_helper_force_kernel_mode(); |
785b93ef | 400 | } |
785b93ef DA |
401 | |
402 | static struct notifier_block paniced = { | |
403 | .notifier_call = drm_fb_helper_panic, | |
404 | }; | |
405 | ||
20c60c35 DV |
406 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
407 | { | |
408 | struct drm_device *dev = fb_helper->dev; | |
409 | struct drm_crtc *crtc; | |
410 | int bound = 0, crtcs_bound = 0; | |
411 | ||
520edd13 PZ |
412 | /* Sometimes user space wants everything disabled, so don't steal the |
413 | * display if there's a master. */ | |
414 | if (dev->primary->master) | |
415 | return false; | |
416 | ||
20c60c35 | 417 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
f4510a27 | 418 | if (crtc->primary->fb) |
20c60c35 | 419 | crtcs_bound++; |
f4510a27 | 420 | if (crtc->primary->fb == fb_helper->fb) |
20c60c35 DV |
421 | bound++; |
422 | } | |
423 | ||
424 | if (bound < crtcs_bound) | |
425 | return false; | |
520edd13 | 426 | |
20c60c35 DV |
427 | return true; |
428 | } | |
429 | ||
bea1d35b | 430 | #ifdef CONFIG_MAGIC_SYSRQ |
785b93ef DA |
431 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
432 | { | |
d21bf469 DV |
433 | bool ret; |
434 | ret = drm_fb_helper_force_kernel_mode(); | |
435 | if (ret == true) | |
436 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
437 | } |
438 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
439 | ||
1495cc9d | 440 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
441 | { |
442 | schedule_work(&drm_fb_helper_restore_work); | |
443 | } | |
444 | ||
445 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
446 | .handler = drm_fb_helper_sysrq, | |
447 | .help_msg = "force-fb(V)", | |
448 | .action_msg = "Restore framebuffer console", | |
449 | }; | |
b8c40d62 RD |
450 | #else |
451 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 452 | #endif |
785b93ef | 453 | |
3a8148c5 | 454 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
455 | { |
456 | struct drm_fb_helper *fb_helper = info->par; | |
457 | struct drm_device *dev = fb_helper->dev; | |
458 | struct drm_crtc *crtc; | |
023eb571 | 459 | struct drm_connector *connector; |
023eb571 | 460 | int i, j; |
785b93ef | 461 | |
928c2f0c DV |
462 | /* |
463 | * fbdev->blank can be called from irq context in case of a panic. | |
1b1d5397 DV |
464 | * Since we already have our own special panic handler which will |
465 | * restore the fbdev console mode completely, just bail out early. | |
466 | */ | |
467 | if (oops_in_progress) | |
468 | return; | |
469 | ||
785b93ef | 470 | /* |
3a8148c5 | 471 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 472 | */ |
84849903 | 473 | drm_modeset_lock_all(dev); |
20c60c35 DV |
474 | if (!drm_fb_helper_is_bound(fb_helper)) { |
475 | drm_modeset_unlock_all(dev); | |
476 | return; | |
477 | } | |
478 | ||
e87b2c42 | 479 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 480 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 481 | |
8be48d92 DA |
482 | if (!crtc->enabled) |
483 | continue; | |
484 | ||
3a8148c5 | 485 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
486 | for (j = 0; j < fb_helper->connector_count; j++) { |
487 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 488 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 489 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 490 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 491 | } |
785b93ef | 492 | } |
84849903 | 493 | drm_modeset_unlock_all(dev); |
785b93ef DA |
494 | } |
495 | ||
207fd329 DV |
496 | /** |
497 | * drm_fb_helper_blank - implementation for ->fb_blank | |
498 | * @blank: desired blanking state | |
499 | * @info: fbdev registered by the helper | |
500 | */ | |
785b93ef DA |
501 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
502 | { | |
503 | switch (blank) { | |
731b5a15 | 504 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 505 | case FB_BLANK_UNBLANK: |
3a8148c5 | 506 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 507 | break; |
731b5a15 | 508 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 509 | case FB_BLANK_NORMAL: |
3a8148c5 | 510 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 511 | break; |
731b5a15 | 512 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 513 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 514 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 515 | break; |
731b5a15 | 516 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 517 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 518 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 519 | break; |
731b5a15 | 520 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 521 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 522 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
523 | break; |
524 | } | |
525 | return 0; | |
526 | } | |
527 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
528 | ||
529 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
530 | { | |
531 | int i; | |
532 | ||
0b4c0f3f DA |
533 | for (i = 0; i < helper->connector_count; i++) |
534 | kfree(helper->connector_info[i]); | |
535 | kfree(helper->connector_info); | |
a1b7736d | 536 | for (i = 0; i < helper->crtc_count; i++) { |
785b93ef | 537 | kfree(helper->crtc_info[i].mode_set.connectors); |
a1b7736d SH |
538 | if (helper->crtc_info[i].mode_set.mode) |
539 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); | |
540 | } | |
785b93ef DA |
541 | kfree(helper->crtc_info); |
542 | } | |
543 | ||
10a23102 TR |
544 | /** |
545 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
546 | * @dev: DRM device | |
547 | * @helper: driver-allocated fbdev helper structure to set up | |
548 | * @funcs: pointer to structure of functions associate with this helper | |
549 | * | |
550 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
551 | * useful to implement race-free initialization of the polling helpers. | |
552 | */ | |
553 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
554 | const struct drm_fb_helper_funcs *funcs) | |
555 | { | |
556 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
557 | helper->funcs = funcs; | |
558 | helper->dev = dev; | |
559 | } | |
560 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
561 | ||
207fd329 DV |
562 | /** |
563 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
564 | * @dev: drm device | |
565 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
566 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation | |
567 | * @max_conn_count: max connector count | |
568 | * | |
569 | * This allocates the structures for the fbdev helper with the given limits. | |
570 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
571 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
572 | * to allow driver writes more control over the exact init sequence. | |
573 | * | |
10a23102 | 574 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
575 | * |
576 | * RETURNS: | |
577 | * Zero if everything went ok, nonzero otherwise. | |
578 | */ | |
4abe3520 DA |
579 | int drm_fb_helper_init(struct drm_device *dev, |
580 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 581 | int crtc_count, int max_conn_count) |
785b93ef | 582 | { |
785b93ef | 583 | struct drm_crtc *crtc; |
785b93ef DA |
584 | int i; |
585 | ||
04cfe97e XL |
586 | if (!max_conn_count) |
587 | return -EINVAL; | |
588 | ||
4abe3520 DA |
589 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
590 | if (!fb_helper->crtc_info) | |
785b93ef DA |
591 | return -ENOMEM; |
592 | ||
4abe3520 DA |
593 | fb_helper->crtc_count = crtc_count; |
594 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
595 | if (!fb_helper->connector_info) { | |
596 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
597 | return -ENOMEM; |
598 | } | |
4abe3520 | 599 | fb_helper->connector_count = 0; |
785b93ef DA |
600 | |
601 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 602 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
603 | kcalloc(max_conn_count, |
604 | sizeof(struct drm_connector *), | |
605 | GFP_KERNEL); | |
606 | ||
4a1b0714 | 607 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 608 | goto out_free; |
4abe3520 | 609 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
610 | } |
611 | ||
612 | i = 0; | |
613 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
4abe3520 | 614 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
615 | i++; |
616 | } | |
e9ad3181 | 617 | |
785b93ef DA |
618 | return 0; |
619 | out_free: | |
4abe3520 | 620 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
621 | return -ENOMEM; |
622 | } | |
4abe3520 DA |
623 | EXPORT_SYMBOL(drm_fb_helper_init); |
624 | ||
625 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) | |
626 | { | |
627 | if (!list_empty(&fb_helper->kernel_fb_list)) { | |
628 | list_del(&fb_helper->kernel_fb_list); | |
629 | if (list_empty(&kernel_fb_helper_list)) { | |
d56b1b9d | 630 | pr_info("drm: unregistered panic notifier\n"); |
4abe3520 DA |
631 | atomic_notifier_chain_unregister(&panic_notifier_list, |
632 | &paniced); | |
633 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
634 | } | |
635 | } | |
636 | ||
637 | drm_fb_helper_crtc_free(fb_helper); | |
638 | ||
4abe3520 DA |
639 | } |
640 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 641 | |
c850cb78 | 642 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
643 | u16 blue, u16 regno, struct fb_info *info) |
644 | { | |
645 | struct drm_fb_helper *fb_helper = info->par; | |
646 | struct drm_framebuffer *fb = fb_helper->fb; | |
647 | int pindex; | |
648 | ||
c850cb78 DA |
649 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
650 | u32 *palette; | |
651 | u32 value; | |
652 | /* place color in psuedopalette */ | |
653 | if (regno > 16) | |
654 | return -EINVAL; | |
655 | palette = (u32 *)info->pseudo_palette; | |
656 | red >>= (16 - info->var.red.length); | |
657 | green >>= (16 - info->var.green.length); | |
658 | blue >>= (16 - info->var.blue.length); | |
659 | value = (red << info->var.red.offset) | | |
660 | (green << info->var.green.offset) | | |
661 | (blue << info->var.blue.offset); | |
9da12b6a RC |
662 | if (info->var.transp.length > 0) { |
663 | u32 mask = (1 << info->var.transp.length) - 1; | |
664 | mask <<= info->var.transp.offset; | |
665 | value |= mask; | |
666 | } | |
c850cb78 DA |
667 | palette[regno] = value; |
668 | return 0; | |
669 | } | |
670 | ||
04c0c569 VS |
671 | /* |
672 | * The driver really shouldn't advertise pseudo/directcolor | |
673 | * visuals if it can't deal with the palette. | |
674 | */ | |
675 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
676 | !fb_helper->funcs->gamma_get)) | |
677 | return -EINVAL; | |
678 | ||
b8c00ac5 DA |
679 | pindex = regno; |
680 | ||
681 | if (fb->bits_per_pixel == 16) { | |
682 | pindex = regno << 3; | |
683 | ||
684 | if (fb->depth == 16 && regno > 63) | |
c850cb78 | 685 | return -EINVAL; |
b8c00ac5 | 686 | if (fb->depth == 15 && regno > 31) |
c850cb78 | 687 | return -EINVAL; |
b8c00ac5 DA |
688 | |
689 | if (fb->depth == 16) { | |
690 | u16 r, g, b; | |
691 | int i; | |
692 | if (regno < 32) { | |
693 | for (i = 0; i < 8; i++) | |
694 | fb_helper->funcs->gamma_set(crtc, red, | |
695 | green, blue, pindex + i); | |
696 | } | |
697 | ||
698 | fb_helper->funcs->gamma_get(crtc, &r, | |
699 | &g, &b, | |
700 | pindex >> 1); | |
701 | ||
702 | for (i = 0; i < 4; i++) | |
703 | fb_helper->funcs->gamma_set(crtc, r, | |
704 | green, b, | |
705 | (pindex >> 1) + i); | |
706 | } | |
707 | } | |
708 | ||
709 | if (fb->depth != 16) | |
710 | fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); | |
c850cb78 | 711 | return 0; |
b8c00ac5 DA |
712 | } |
713 | ||
207fd329 DV |
714 | /** |
715 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap | |
716 | * @cmap: cmap to set | |
717 | * @info: fbdev registered by the helper | |
718 | */ | |
068143d3 DA |
719 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
720 | { | |
721 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 722 | struct drm_device *dev = fb_helper->dev; |
8be48d92 | 723 | struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
724 | u16 *red, *green, *blue, *transp; |
725 | struct drm_crtc *crtc; | |
062ac622 | 726 | int i, j, rc = 0; |
068143d3 DA |
727 | int start; |
728 | ||
8391a3d5 VS |
729 | drm_modeset_lock_all(dev); |
730 | if (!drm_fb_helper_is_bound(fb_helper)) { | |
731 | drm_modeset_unlock_all(dev); | |
732 | return -EBUSY; | |
733 | } | |
734 | ||
8be48d92 DA |
735 | for (i = 0; i < fb_helper->crtc_count; i++) { |
736 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
737 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
738 | |
739 | red = cmap->red; | |
740 | green = cmap->green; | |
741 | blue = cmap->blue; | |
742 | transp = cmap->transp; | |
743 | start = cmap->start; | |
744 | ||
062ac622 | 745 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
746 | u16 hred, hgreen, hblue, htransp = 0xffff; |
747 | ||
748 | hred = *red++; | |
749 | hgreen = *green++; | |
750 | hblue = *blue++; | |
751 | ||
752 | if (transp) | |
753 | htransp = *transp++; | |
754 | ||
c850cb78 DA |
755 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
756 | if (rc) | |
8391a3d5 | 757 | goto out; |
068143d3 | 758 | } |
04c0c569 VS |
759 | if (crtc_funcs->load_lut) |
760 | crtc_funcs->load_lut(crtc); | |
068143d3 | 761 | } |
8391a3d5 VS |
762 | out: |
763 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
764 | return rc; |
765 | } | |
766 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
767 | ||
207fd329 DV |
768 | /** |
769 | * drm_fb_helper_check_var - implementation for ->fb_check_var | |
770 | * @var: screeninfo to check | |
771 | * @info: fbdev registered by the helper | |
772 | */ | |
785b93ef DA |
773 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
774 | struct fb_info *info) | |
775 | { | |
776 | struct drm_fb_helper *fb_helper = info->par; | |
777 | struct drm_framebuffer *fb = fb_helper->fb; | |
778 | int depth; | |
779 | ||
f90ebd9e | 780 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
781 | return -EINVAL; |
782 | ||
783 | /* Need to resize the fb object !!! */ | |
62fb376e CW |
784 | if (var->bits_per_pixel > fb->bits_per_pixel || |
785 | var->xres > fb->width || var->yres > fb->height || | |
786 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
509c7d83 | 787 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
62fb376e CW |
788 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
789 | var->xres, var->yres, var->bits_per_pixel, | |
790 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 791 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
792 | return -EINVAL; |
793 | } | |
794 | ||
795 | switch (var->bits_per_pixel) { | |
796 | case 16: | |
797 | depth = (var->green.length == 6) ? 16 : 15; | |
798 | break; | |
799 | case 32: | |
800 | depth = (var->transp.length > 0) ? 32 : 24; | |
801 | break; | |
802 | default: | |
803 | depth = var->bits_per_pixel; | |
804 | break; | |
805 | } | |
806 | ||
807 | switch (depth) { | |
808 | case 8: | |
809 | var->red.offset = 0; | |
810 | var->green.offset = 0; | |
811 | var->blue.offset = 0; | |
812 | var->red.length = 8; | |
813 | var->green.length = 8; | |
814 | var->blue.length = 8; | |
815 | var->transp.length = 0; | |
816 | var->transp.offset = 0; | |
817 | break; | |
818 | case 15: | |
819 | var->red.offset = 10; | |
820 | var->green.offset = 5; | |
821 | var->blue.offset = 0; | |
822 | var->red.length = 5; | |
823 | var->green.length = 5; | |
824 | var->blue.length = 5; | |
825 | var->transp.length = 1; | |
826 | var->transp.offset = 15; | |
827 | break; | |
828 | case 16: | |
829 | var->red.offset = 11; | |
830 | var->green.offset = 5; | |
831 | var->blue.offset = 0; | |
832 | var->red.length = 5; | |
833 | var->green.length = 6; | |
834 | var->blue.length = 5; | |
835 | var->transp.length = 0; | |
836 | var->transp.offset = 0; | |
837 | break; | |
838 | case 24: | |
839 | var->red.offset = 16; | |
840 | var->green.offset = 8; | |
841 | var->blue.offset = 0; | |
842 | var->red.length = 8; | |
843 | var->green.length = 8; | |
844 | var->blue.length = 8; | |
845 | var->transp.length = 0; | |
846 | var->transp.offset = 0; | |
847 | break; | |
848 | case 32: | |
849 | var->red.offset = 16; | |
850 | var->green.offset = 8; | |
851 | var->blue.offset = 0; | |
852 | var->red.length = 8; | |
853 | var->green.length = 8; | |
854 | var->blue.length = 8; | |
855 | var->transp.length = 8; | |
856 | var->transp.offset = 24; | |
857 | break; | |
858 | default: | |
859 | return -EINVAL; | |
860 | } | |
861 | return 0; | |
862 | } | |
863 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
864 | ||
207fd329 DV |
865 | /** |
866 | * drm_fb_helper_set_par - implementation for ->fb_set_par | |
867 | * @info: fbdev registered by the helper | |
868 | * | |
869 | * This will let fbcon do the mode init and is called at initialization time by | |
870 | * the fbdev core when registering the driver, and later on through the hotplug | |
871 | * callback. | |
872 | */ | |
785b93ef DA |
873 | int drm_fb_helper_set_par(struct fb_info *info) |
874 | { | |
875 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 876 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 877 | |
5349ef31 | 878 | if (var->pixclock != 0) { |
172e91f5 | 879 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
880 | return -EINVAL; |
881 | } | |
882 | ||
5ea1f752 | 883 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 DA |
884 | |
885 | if (fb_helper->delayed_hotplug) { | |
886 | fb_helper->delayed_hotplug = false; | |
eb1f8e4f | 887 | drm_fb_helper_hotplug_event(fb_helper); |
4abe3520 | 888 | } |
785b93ef DA |
889 | return 0; |
890 | } | |
891 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
892 | ||
207fd329 DV |
893 | /** |
894 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display | |
895 | * @var: updated screen information | |
896 | * @info: fbdev registered by the helper | |
897 | */ | |
785b93ef DA |
898 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
899 | struct fb_info *info) | |
900 | { | |
901 | struct drm_fb_helper *fb_helper = info->par; | |
902 | struct drm_device *dev = fb_helper->dev; | |
903 | struct drm_mode_set *modeset; | |
785b93ef DA |
904 | int ret = 0; |
905 | int i; | |
906 | ||
84849903 | 907 | drm_modeset_lock_all(dev); |
20c60c35 DV |
908 | if (!drm_fb_helper_is_bound(fb_helper)) { |
909 | drm_modeset_unlock_all(dev); | |
910 | return -EBUSY; | |
911 | } | |
912 | ||
8be48d92 | 913 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
914 | modeset = &fb_helper->crtc_info[i].mode_set; |
915 | ||
916 | modeset->x = var->xoffset; | |
917 | modeset->y = var->yoffset; | |
918 | ||
919 | if (modeset->num_connectors) { | |
2d13b679 | 920 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
921 | if (!ret) { |
922 | info->var.xoffset = var->xoffset; | |
923 | info->var.yoffset = var->yoffset; | |
924 | } | |
925 | } | |
926 | } | |
84849903 | 927 | drm_modeset_unlock_all(dev); |
785b93ef DA |
928 | return ret; |
929 | } | |
930 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
931 | ||
8acf658a | 932 | /* |
207fd329 DV |
933 | * Allocates the backing storage and sets up the fbdev info structure through |
934 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
935 | * notifier. | |
8acf658a | 936 | */ |
de1ace5b DV |
937 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
938 | int preferred_bpp) | |
785b93ef | 939 | { |
8acf658a | 940 | int ret = 0; |
785b93ef | 941 | int crtc_count = 0; |
4abe3520 | 942 | int i; |
785b93ef | 943 | struct fb_info *info; |
38651674 | 944 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 945 | int gamma_size = 0; |
38651674 DA |
946 | |
947 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
948 | sizes.surface_depth = 24; | |
949 | sizes.surface_bpp = 32; | |
950 | sizes.fb_width = (unsigned)-1; | |
951 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 952 | |
b8c00ac5 DA |
953 | /* if driver picks 8 or 16 by default use that |
954 | for both depth/bpp */ | |
96081cdf | 955 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 956 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 957 | |
785b93ef | 958 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
959 | for (i = 0; i < fb_helper->connector_count; i++) { |
960 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 961 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 962 | |
0b4c0f3f | 963 | cmdline_mode = &fb_helper_conn->cmdline_mode; |
d50ba256 DA |
964 | |
965 | if (cmdline_mode->bpp_specified) { | |
966 | switch (cmdline_mode->bpp) { | |
967 | case 8: | |
38651674 | 968 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
969 | break; |
970 | case 15: | |
38651674 DA |
971 | sizes.surface_depth = 15; |
972 | sizes.surface_bpp = 16; | |
d50ba256 DA |
973 | break; |
974 | case 16: | |
38651674 | 975 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
976 | break; |
977 | case 24: | |
38651674 | 978 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
979 | break; |
980 | case 32: | |
38651674 DA |
981 | sizes.surface_depth = 24; |
982 | sizes.surface_bpp = 32; | |
d50ba256 DA |
983 | break; |
984 | } | |
985 | break; | |
986 | } | |
987 | } | |
988 | ||
8be48d92 DA |
989 | crtc_count = 0; |
990 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
991 | struct drm_display_mode *desired_mode; | |
992 | desired_mode = fb_helper->crtc_info[i].desired_mode; | |
993 | ||
994 | if (desired_mode) { | |
995 | if (gamma_size == 0) | |
996 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
997 | if (desired_mode->hdisplay < sizes.fb_width) | |
998 | sizes.fb_width = desired_mode->hdisplay; | |
999 | if (desired_mode->vdisplay < sizes.fb_height) | |
1000 | sizes.fb_height = desired_mode->vdisplay; | |
1001 | if (desired_mode->hdisplay > sizes.surface_width) | |
1002 | sizes.surface_width = desired_mode->hdisplay; | |
1003 | if (desired_mode->vdisplay > sizes.surface_height) | |
1004 | sizes.surface_height = desired_mode->vdisplay; | |
785b93ef DA |
1005 | crtc_count++; |
1006 | } | |
1007 | } | |
1008 | ||
38651674 | 1009 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
1010 | /* hmm everyone went away - assume VGA cable just fell out |
1011 | and will come back later. */ | |
eb1f8e4f | 1012 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1013 | sizes.fb_width = sizes.surface_width = 1024; |
1014 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1015 | } |
1016 | ||
38651674 | 1017 | /* push down into drivers */ |
8acf658a DV |
1018 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1019 | if (ret < 0) | |
1020 | return ret; | |
785b93ef | 1021 | |
38651674 | 1022 | info = fb_helper->fbdev; |
785b93ef | 1023 | |
7e53f3a4 DV |
1024 | /* |
1025 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1026 | * events, but at init time drm_setup_crtcs needs to be called before | |
1027 | * the fb is allocated (since we need to figure out the desired size of | |
1028 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1029 | * here again. | |
1030 | */ | |
96081cdf | 1031 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1032 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1033 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1034 | ||
785b93ef | 1035 | |
8acf658a DV |
1036 | info->var.pixclock = 0; |
1037 | if (register_framebuffer(info) < 0) | |
1038 | return -EINVAL; | |
38651674 | 1039 | |
8acf658a DV |
1040 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
1041 | info->node, info->fix.id); | |
785b93ef DA |
1042 | |
1043 | /* Switch back to kernel console on panic */ | |
1044 | /* multi card linked list maybe */ | |
1045 | if (list_empty(&kernel_fb_helper_list)) { | |
d56b1b9d | 1046 | dev_info(fb_helper->dev->dev, "registered panic notifier\n"); |
785b93ef DA |
1047 | atomic_notifier_chain_register(&panic_notifier_list, |
1048 | &paniced); | |
1049 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
1050 | } | |
8acf658a DV |
1051 | |
1052 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
38651674 | 1053 | |
785b93ef DA |
1054 | return 0; |
1055 | } | |
785b93ef | 1056 | |
207fd329 DV |
1057 | /** |
1058 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1059 | * @info: fbdev registered by the helper | |
1060 | * @pitch: desired pitch | |
1061 | * @depth: desired depth | |
1062 | * | |
1063 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1064 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1065 | * additional constraints need to set up their own limits. | |
1066 | * | |
1067 | * Drivers should call this (or their equivalent setup code) from their | |
1068 | * ->fb_probe callback. | |
1069 | */ | |
3632ef89 DA |
1070 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1071 | uint32_t depth) | |
1072 | { | |
1073 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1074 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1075 | FB_VISUAL_TRUECOLOR; | |
1076 | info->fix.mmio_start = 0; | |
1077 | info->fix.mmio_len = 0; | |
1078 | info->fix.type_aux = 0; | |
1079 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1080 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1081 | info->fix.ywrapstep = 0; | |
1082 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1083 | |
1084 | info->fix.line_length = pitch; | |
1085 | return; | |
1086 | } | |
1087 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1088 | ||
207fd329 DV |
1089 | /** |
1090 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1091 | * @info: fbdev instance to set up | |
1092 | * @fb_helper: fb helper instance to use as template | |
1093 | * @fb_width: desired fb width | |
1094 | * @fb_height: desired fb height | |
1095 | * | |
1096 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
1097 | * and the drm framebuffer allocated in fb_helper->fb. | |
1098 | * | |
1099 | * Drivers should call this (or their equivalent setup code) from their | |
1100 | * ->fb_probe callback after having allocated the fbdev backing | |
1101 | * storage framebuffer. | |
1102 | */ | |
38651674 | 1103 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1104 | uint32_t fb_width, uint32_t fb_height) |
1105 | { | |
38651674 DA |
1106 | struct drm_framebuffer *fb = fb_helper->fb; |
1107 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1108 | info->var.xres_virtual = fb->width; |
1109 | info->var.yres_virtual = fb->height; | |
1110 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 1111 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1112 | info->var.xoffset = 0; |
1113 | info->var.yoffset = 0; | |
1114 | info->var.activate = FB_ACTIVATE_NOW; | |
1115 | info->var.height = -1; | |
1116 | info->var.width = -1; | |
1117 | ||
1118 | switch (fb->depth) { | |
1119 | case 8: | |
1120 | info->var.red.offset = 0; | |
1121 | info->var.green.offset = 0; | |
1122 | info->var.blue.offset = 0; | |
1123 | info->var.red.length = 8; /* 8bit DAC */ | |
1124 | info->var.green.length = 8; | |
1125 | info->var.blue.length = 8; | |
1126 | info->var.transp.offset = 0; | |
1127 | info->var.transp.length = 0; | |
1128 | break; | |
1129 | case 15: | |
1130 | info->var.red.offset = 10; | |
1131 | info->var.green.offset = 5; | |
1132 | info->var.blue.offset = 0; | |
1133 | info->var.red.length = 5; | |
1134 | info->var.green.length = 5; | |
1135 | info->var.blue.length = 5; | |
1136 | info->var.transp.offset = 15; | |
1137 | info->var.transp.length = 1; | |
1138 | break; | |
1139 | case 16: | |
1140 | info->var.red.offset = 11; | |
1141 | info->var.green.offset = 5; | |
1142 | info->var.blue.offset = 0; | |
1143 | info->var.red.length = 5; | |
1144 | info->var.green.length = 6; | |
1145 | info->var.blue.length = 5; | |
1146 | info->var.transp.offset = 0; | |
1147 | break; | |
1148 | case 24: | |
1149 | info->var.red.offset = 16; | |
1150 | info->var.green.offset = 8; | |
1151 | info->var.blue.offset = 0; | |
1152 | info->var.red.length = 8; | |
1153 | info->var.green.length = 8; | |
1154 | info->var.blue.length = 8; | |
1155 | info->var.transp.offset = 0; | |
1156 | info->var.transp.length = 0; | |
1157 | break; | |
1158 | case 32: | |
1159 | info->var.red.offset = 16; | |
1160 | info->var.green.offset = 8; | |
1161 | info->var.blue.offset = 0; | |
1162 | info->var.red.length = 8; | |
1163 | info->var.green.length = 8; | |
1164 | info->var.blue.length = 8; | |
1165 | info->var.transp.offset = 24; | |
1166 | info->var.transp.length = 8; | |
1167 | break; | |
1168 | default: | |
1169 | break; | |
1170 | } | |
1171 | ||
1172 | info->var.xres = fb_width; | |
1173 | info->var.yres = fb_height; | |
1174 | } | |
1175 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1176 | |
0b4c0f3f DA |
1177 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1178 | uint32_t maxX, | |
1179 | uint32_t maxY) | |
38651674 DA |
1180 | { |
1181 | struct drm_connector *connector; | |
1182 | int count = 0; | |
0b4c0f3f | 1183 | int i; |
38651674 | 1184 | |
0b4c0f3f DA |
1185 | for (i = 0; i < fb_helper->connector_count; i++) { |
1186 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1187 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1188 | } | |
1189 | ||
1190 | return count; | |
1191 | } | |
1192 | ||
2f1046f3 | 1193 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1194 | { |
1195 | struct drm_display_mode *mode; | |
1196 | ||
0b4c0f3f | 1197 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1198 | if (mode->hdisplay > width || |
1199 | mode->vdisplay > height) | |
38651674 DA |
1200 | continue; |
1201 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1202 | return mode; | |
1203 | } | |
1204 | return NULL; | |
1205 | } | |
2f1046f3 | 1206 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1207 | |
0b4c0f3f | 1208 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1209 | { |
1794d257 | 1210 | struct drm_cmdline_mode *cmdline_mode; |
0b4c0f3f | 1211 | cmdline_mode = &fb_connector->cmdline_mode; |
38651674 DA |
1212 | return cmdline_mode->specified; |
1213 | } | |
1214 | ||
2f1046f3 | 1215 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
0b4c0f3f | 1216 | int width, int height) |
38651674 | 1217 | { |
1794d257 | 1218 | struct drm_cmdline_mode *cmdline_mode; |
38651674 | 1219 | struct drm_display_mode *mode = NULL; |
c683f427 | 1220 | bool prefer_non_interlace; |
38651674 | 1221 | |
0b4c0f3f | 1222 | cmdline_mode = &fb_helper_conn->cmdline_mode; |
38651674 DA |
1223 | if (cmdline_mode->specified == false) |
1224 | return mode; | |
1225 | ||
1226 | /* attempt to find a matching mode in the list of modes | |
1227 | * we have gotten so far, if not add a CVT mode that conforms | |
1228 | */ | |
1229 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1230 | goto create_mode; | |
1231 | ||
c683f427 TI |
1232 | prefer_non_interlace = !cmdline_mode->interlace; |
1233 | again: | |
0b4c0f3f | 1234 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1235 | /* check width/height */ |
1236 | if (mode->hdisplay != cmdline_mode->xres || | |
1237 | mode->vdisplay != cmdline_mode->yres) | |
1238 | continue; | |
1239 | ||
1240 | if (cmdline_mode->refresh_specified) { | |
1241 | if (mode->vrefresh != cmdline_mode->refresh) | |
1242 | continue; | |
1243 | } | |
1244 | ||
1245 | if (cmdline_mode->interlace) { | |
1246 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1247 | continue; | |
c683f427 TI |
1248 | } else if (prefer_non_interlace) { |
1249 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1250 | continue; | |
38651674 DA |
1251 | } |
1252 | return mode; | |
1253 | } | |
1254 | ||
c683f427 TI |
1255 | if (prefer_non_interlace) { |
1256 | prefer_non_interlace = false; | |
1257 | goto again; | |
1258 | } | |
1259 | ||
38651674 | 1260 | create_mode: |
1794d257 CW |
1261 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1262 | cmdline_mode); | |
0b4c0f3f | 1263 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1264 | return mode; |
1265 | } | |
2f1046f3 | 1266 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1267 | |
1268 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1269 | { | |
1270 | bool enable; | |
1271 | ||
96081cdf | 1272 | if (strict) |
38651674 | 1273 | enable = connector->status == connector_status_connected; |
96081cdf | 1274 | else |
38651674 | 1275 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1276 | |
38651674 DA |
1277 | return enable; |
1278 | } | |
1279 | ||
0b4c0f3f DA |
1280 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1281 | bool *enabled) | |
38651674 DA |
1282 | { |
1283 | bool any_enabled = false; | |
1284 | struct drm_connector *connector; | |
1285 | int i = 0; | |
1286 | ||
0b4c0f3f DA |
1287 | for (i = 0; i < fb_helper->connector_count; i++) { |
1288 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1289 | enabled[i] = drm_connector_enabled(connector, true); |
1290 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1291 | enabled[i] ? "yes" : "no"); | |
1292 | any_enabled |= enabled[i]; | |
38651674 DA |
1293 | } |
1294 | ||
1295 | if (any_enabled) | |
1296 | return; | |
1297 | ||
0b4c0f3f DA |
1298 | for (i = 0; i < fb_helper->connector_count; i++) { |
1299 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1300 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1301 | } |
1302 | } | |
1303 | ||
1d42bbc8 DA |
1304 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1305 | struct drm_display_mode **modes, | |
1306 | bool *enabled, int width, int height) | |
1307 | { | |
1308 | int count, i, j; | |
1309 | bool can_clone = false; | |
1310 | struct drm_fb_helper_connector *fb_helper_conn; | |
1311 | struct drm_display_mode *dmt_mode, *mode; | |
1312 | ||
1313 | /* only contemplate cloning in the single crtc case */ | |
1314 | if (fb_helper->crtc_count > 1) | |
1315 | return false; | |
1316 | ||
1317 | count = 0; | |
1318 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1319 | if (enabled[i]) | |
1320 | count++; | |
1321 | } | |
1322 | ||
1323 | /* only contemplate cloning if more than one connector is enabled */ | |
1324 | if (count <= 1) | |
1325 | return false; | |
1326 | ||
1327 | /* check the command line or if nothing common pick 1024x768 */ | |
1328 | can_clone = true; | |
1329 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1330 | if (!enabled[i]) | |
1331 | continue; | |
1332 | fb_helper_conn = fb_helper->connector_info[i]; | |
1333 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1334 | if (!modes[i]) { | |
1335 | can_clone = false; | |
1336 | break; | |
1337 | } | |
1338 | for (j = 0; j < i; j++) { | |
1339 | if (!enabled[j]) | |
1340 | continue; | |
1341 | if (!drm_mode_equal(modes[j], modes[i])) | |
1342 | can_clone = false; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | if (can_clone) { | |
1347 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1348 | return true; | |
1349 | } | |
1350 | ||
1351 | /* try and find a 1024x768 mode on each connector */ | |
1352 | can_clone = true; | |
f6e252ba | 1353 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1354 | |
1355 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1356 | ||
1357 | if (!enabled[i]) | |
1358 | continue; | |
1359 | ||
1360 | fb_helper_conn = fb_helper->connector_info[i]; | |
1361 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1362 | if (drm_mode_equal(mode, dmt_mode)) | |
1363 | modes[i] = mode; | |
1364 | } | |
1365 | if (!modes[i]) | |
1366 | can_clone = false; | |
1367 | } | |
1368 | ||
1369 | if (can_clone) { | |
1370 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1371 | return true; | |
1372 | } | |
1373 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1374 | return false; | |
1375 | } | |
1376 | ||
0b4c0f3f | 1377 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 DA |
1378 | struct drm_display_mode **modes, |
1379 | bool *enabled, int width, int height) | |
1380 | { | |
0b4c0f3f DA |
1381 | struct drm_fb_helper_connector *fb_helper_conn; |
1382 | int i; | |
38651674 | 1383 | |
0b4c0f3f DA |
1384 | for (i = 0; i < fb_helper->connector_count; i++) { |
1385 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1386 | |
0b4c0f3f | 1387 | if (enabled[i] == false) |
38651674 | 1388 | continue; |
38651674 DA |
1389 | |
1390 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", | |
0b4c0f3f | 1391 | fb_helper_conn->connector->base.id); |
38651674 DA |
1392 | |
1393 | /* got for command line mode first */ | |
0b4c0f3f | 1394 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 DA |
1395 | if (!modes[i]) { |
1396 | DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", | |
0b4c0f3f DA |
1397 | fb_helper_conn->connector->base.id); |
1398 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); | |
38651674 DA |
1399 | } |
1400 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
1401 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
1402 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
1403 | break; |
1404 | } | |
1405 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
1406 | "none"); | |
38651674 DA |
1407 | } |
1408 | return true; | |
1409 | } | |
1410 | ||
8be48d92 DA |
1411 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
1412 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
1413 | struct drm_display_mode **modes, |
1414 | int n, int width, int height) | |
1415 | { | |
1416 | int c, o; | |
8be48d92 | 1417 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
1418 | struct drm_connector *connector; |
1419 | struct drm_connector_helper_funcs *connector_funcs; | |
1420 | struct drm_encoder *encoder; | |
38651674 | 1421 | int my_score, best_score, score; |
8be48d92 | 1422 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 1423 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 1424 | |
0b4c0f3f | 1425 | if (n == fb_helper->connector_count) |
38651674 | 1426 | return 0; |
0b4c0f3f DA |
1427 | |
1428 | fb_helper_conn = fb_helper->connector_info[n]; | |
1429 | connector = fb_helper_conn->connector; | |
38651674 DA |
1430 | |
1431 | best_crtcs[n] = NULL; | |
8be48d92 | 1432 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
1433 | if (modes[n] == NULL) |
1434 | return best_score; | |
1435 | ||
8be48d92 DA |
1436 | crtcs = kzalloc(dev->mode_config.num_connector * |
1437 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); | |
38651674 DA |
1438 | if (!crtcs) |
1439 | return best_score; | |
1440 | ||
1441 | my_score = 1; | |
1442 | if (connector->status == connector_status_connected) | |
1443 | my_score++; | |
0b4c0f3f | 1444 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 1445 | my_score++; |
0b4c0f3f | 1446 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
1447 | my_score++; |
1448 | ||
1449 | connector_funcs = connector->helper_private; | |
1450 | encoder = connector_funcs->best_encoder(connector); | |
1451 | if (!encoder) | |
1452 | goto out; | |
1453 | ||
38651674 DA |
1454 | /* select a crtc for this connector and then attempt to configure |
1455 | remaining connectors */ | |
8be48d92 DA |
1456 | for (c = 0; c < fb_helper->crtc_count; c++) { |
1457 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 1458 | |
96081cdf | 1459 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 1460 | continue; |
38651674 DA |
1461 | |
1462 | for (o = 0; o < n; o++) | |
1463 | if (best_crtcs[o] == crtc) | |
1464 | break; | |
1465 | ||
1466 | if (o < n) { | |
1d42bbc8 DA |
1467 | /* ignore cloning unless only a single crtc */ |
1468 | if (fb_helper->crtc_count > 1) | |
1469 | continue; | |
1470 | ||
1471 | if (!drm_mode_equal(modes[o], modes[n])) | |
1472 | continue; | |
38651674 DA |
1473 | } |
1474 | ||
1475 | crtcs[n] = crtc; | |
8be48d92 DA |
1476 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
1477 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
1478 | width, height); |
1479 | if (score > best_score) { | |
38651674 DA |
1480 | best_score = score; |
1481 | memcpy(best_crtcs, crtcs, | |
1482 | dev->mode_config.num_connector * | |
8be48d92 | 1483 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 1484 | } |
38651674 DA |
1485 | } |
1486 | out: | |
1487 | kfree(crtcs); | |
1488 | return best_score; | |
1489 | } | |
1490 | ||
8be48d92 | 1491 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 1492 | { |
8be48d92 DA |
1493 | struct drm_device *dev = fb_helper->dev; |
1494 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 1495 | struct drm_display_mode **modes; |
8be48d92 | 1496 | struct drm_mode_set *modeset; |
38651674 DA |
1497 | bool *enabled; |
1498 | int width, height; | |
11e17a08 | 1499 | int i; |
38651674 DA |
1500 | |
1501 | DRM_DEBUG_KMS("\n"); | |
1502 | ||
1503 | width = dev->mode_config.max_width; | |
1504 | height = dev->mode_config.max_height; | |
1505 | ||
38651674 | 1506 | crtcs = kcalloc(dev->mode_config.num_connector, |
8be48d92 | 1507 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
1508 | modes = kcalloc(dev->mode_config.num_connector, |
1509 | sizeof(struct drm_display_mode *), GFP_KERNEL); | |
1510 | enabled = kcalloc(dev->mode_config.num_connector, | |
1511 | sizeof(bool), GFP_KERNEL); | |
8c5eaca0 SK |
1512 | if (!crtcs || !modes || !enabled) { |
1513 | DRM_ERROR("Memory allocation failed\n"); | |
1514 | goto out; | |
1515 | } | |
1516 | ||
38651674 | 1517 | |
0b4c0f3f | 1518 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 1519 | |
11e17a08 JB |
1520 | if (!(fb_helper->funcs->initial_config && |
1521 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
1522 | enabled, width, height))) { | |
1523 | memset(modes, 0, dev->mode_config.num_connector*sizeof(modes[0])); | |
1524 | memset(crtcs, 0, dev->mode_config.num_connector*sizeof(crtcs[0])); | |
1525 | ||
1526 | if (!drm_target_cloned(fb_helper, | |
1527 | modes, enabled, width, height) && | |
1528 | !drm_target_preferred(fb_helper, | |
1529 | modes, enabled, width, height)) | |
1d42bbc8 | 1530 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 1531 | |
11e17a08 JB |
1532 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
1533 | width, height); | |
38651674 | 1534 | |
11e17a08 JB |
1535 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
1536 | } | |
8be48d92 DA |
1537 | |
1538 | /* need to set the modesets up here for use later */ | |
1539 | /* fill out the connector<->crtc mappings into the modesets */ | |
1540 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1541 | modeset = &fb_helper->crtc_info[i].mode_set; | |
1542 | modeset->num_connectors = 0; | |
7e53f3a4 | 1543 | modeset->fb = NULL; |
8be48d92 | 1544 | } |
38651674 | 1545 | |
0b4c0f3f | 1546 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 1547 | struct drm_display_mode *mode = modes[i]; |
8be48d92 DA |
1548 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
1549 | modeset = &fb_crtc->mode_set; | |
38651674 | 1550 | |
8be48d92 | 1551 | if (mode && fb_crtc) { |
38651674 | 1552 | DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", |
8be48d92 DA |
1553 | mode->name, fb_crtc->mode_set.crtc->base.id); |
1554 | fb_crtc->desired_mode = mode; | |
1555 | if (modeset->mode) | |
1556 | drm_mode_destroy(dev, modeset->mode); | |
1557 | modeset->mode = drm_mode_duplicate(dev, | |
1558 | fb_crtc->desired_mode); | |
0b4c0f3f | 1559 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
7e53f3a4 | 1560 | modeset->fb = fb_helper->fb; |
38651674 | 1561 | } |
38651674 DA |
1562 | } |
1563 | ||
7e53f3a4 DV |
1564 | /* Clear out any old modes if there are no more connected outputs. */ |
1565 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1566 | modeset = &fb_helper->crtc_info[i].mode_set; | |
1567 | if (modeset->num_connectors == 0) { | |
1568 | BUG_ON(modeset->fb); | |
1569 | BUG_ON(modeset->num_connectors); | |
1570 | if (modeset->mode) | |
1571 | drm_mode_destroy(dev, modeset->mode); | |
1572 | modeset->mode = NULL; | |
1573 | } | |
1574 | } | |
8c5eaca0 | 1575 | out: |
38651674 DA |
1576 | kfree(crtcs); |
1577 | kfree(modes); | |
1578 | kfree(enabled); | |
1579 | } | |
1580 | ||
1581 | /** | |
207fd329 | 1582 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
1583 | * @fb_helper: fb_helper device struct |
1584 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 1585 | * |
d0ddc033 | 1586 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
1587 | * At the moment, this is a cloned configuration across all heads with |
1588 | * a new framebuffer object as the backing store. | |
1589 | * | |
207fd329 DV |
1590 | * Note that this also registers the fbdev and so allows userspace to call into |
1591 | * the driver through the fbdev interfaces. | |
1592 | * | |
1593 | * This function will call down into the ->fb_probe callback to let | |
1594 | * the driver allocate and initialize the fbdev info structure and the drm | |
1595 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
1596 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default | |
1597 | * values for the fbdev info structure. | |
1598 | * | |
38651674 DA |
1599 | * RETURNS: |
1600 | * Zero if everything went ok, nonzero otherwise. | |
1601 | */ | |
4abe3520 | 1602 | bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 1603 | { |
8be48d92 | 1604 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
1605 | int count = 0; |
1606 | ||
0b4c0f3f | 1607 | drm_fb_helper_parse_command_line(fb_helper); |
38651674 | 1608 | |
53f1904b | 1609 | mutex_lock(&dev->mode_config.mutex); |
0b4c0f3f DA |
1610 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
1611 | dev->mode_config.max_width, | |
1612 | dev->mode_config.max_height); | |
53f1904b | 1613 | mutex_unlock(&dev->mode_config.mutex); |
38651674 DA |
1614 | /* |
1615 | * we shouldn't end up with no modes here. | |
1616 | */ | |
96081cdf | 1617 | if (count == 0) |
d56b1b9d | 1618 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 1619 | |
8be48d92 | 1620 | drm_setup_crtcs(fb_helper); |
38651674 | 1621 | |
4abe3520 | 1622 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 1623 | } |
8be48d92 | 1624 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 1625 | |
7394371d CW |
1626 | /** |
1627 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 1628 | * probing all the outputs attached to the fb |
7394371d CW |
1629 | * @fb_helper: the drm_fb_helper |
1630 | * | |
7394371d CW |
1631 | * Scan the connectors attached to the fb_helper and try to put together a |
1632 | * setup after *notification of a change in output configuration. | |
1633 | * | |
207fd329 DV |
1634 | * Called at runtime, takes the mode config locks to be able to check/change the |
1635 | * modeset configuration. Must be run from process context (which usually means | |
1636 | * either the output polling work or a work item launched from the driver's | |
1637 | * hotplug interrupt). | |
1638 | * | |
50c3dc97 DV |
1639 | * Note that drivers may call this even before calling |
1640 | * drm_fb_helper_initial_config but only aftert drm_fb_helper_init. This allows | |
1641 | * for a race-free fbcon setup and will make sure that the fbdev emulation will | |
1642 | * not miss any hotplug events. | |
207fd329 | 1643 | * |
7394371d CW |
1644 | * RETURNS: |
1645 | * 0 on success and a non-zero error code otherwise. | |
1646 | */ | |
1647 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 1648 | { |
7394371d | 1649 | struct drm_device *dev = fb_helper->dev; |
51bbd276 | 1650 | u32 max_width, max_height; |
5c4426a7 | 1651 | |
89ced125 | 1652 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
50c3dc97 | 1653 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 1654 | fb_helper->delayed_hotplug = true; |
89ced125 | 1655 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
7394371d | 1656 | return 0; |
4abe3520 | 1657 | } |
eb1f8e4f | 1658 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 1659 | |
eb1f8e4f DA |
1660 | max_width = fb_helper->fb->width; |
1661 | max_height = fb_helper->fb->height; | |
5c4426a7 | 1662 | |
51bbd276 | 1663 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
89ced125 DV |
1664 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
1665 | ||
1666 | drm_modeset_lock_all(dev); | |
eb1f8e4f | 1667 | drm_setup_crtcs(fb_helper); |
84849903 | 1668 | drm_modeset_unlock_all(dev); |
2180c3c7 DV |
1669 | drm_fb_helper_set_par(fb_helper->fbdev); |
1670 | ||
1671 | return 0; | |
5c4426a7 | 1672 | } |
eb1f8e4f | 1673 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 1674 | |
6a108a14 | 1675 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
1676 | * but the module doesn't depend on any fb console symbols. At least |
1677 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
1678 | */ | |
6a108a14 | 1679 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
1680 | static int __init drm_fb_helper_modinit(void) |
1681 | { | |
1682 | const char *name = "fbcon"; | |
1683 | struct module *fbcon; | |
1684 | ||
1685 | mutex_lock(&module_mutex); | |
1686 | fbcon = find_module(name); | |
1687 | mutex_unlock(&module_mutex); | |
1688 | ||
1689 | if (!fbcon) | |
1690 | request_module_nowait(name); | |
1691 | return 0; | |
1692 | } | |
1693 | ||
1694 | module_init(drm_fb_helper_modinit); | |
1695 | #endif |