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