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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 | */ | |
30 | #include <linux/sysrq.h> | |
31 | #include <linux/fb.h> | |
32 | #include "drmP.h" | |
33 | #include "drm_crtc.h" | |
34 | #include "drm_fb_helper.h" | |
35 | #include "drm_crtc_helper.h" | |
36 | ||
6fcefd56 DA |
37 | MODULE_AUTHOR("David Airlie, Jesse Barnes"); |
38 | MODULE_DESCRIPTION("DRM KMS helper"); | |
39 | MODULE_LICENSE("GPL and additional rights"); | |
40 | ||
785b93ef DA |
41 | static LIST_HEAD(kernel_fb_helper_list); |
42 | ||
d50ba256 DA |
43 | int drm_fb_helper_add_connector(struct drm_connector *connector) |
44 | { | |
45 | connector->fb_helper_private = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
46 | if (!connector->fb_helper_private) | |
47 | return -ENOMEM; | |
48 | ||
49 | return 0; | |
50 | ||
51 | } | |
52 | EXPORT_SYMBOL(drm_fb_helper_add_connector); | |
53 | ||
54 | static int my_atoi(const char *name) | |
55 | { | |
56 | int val = 0; | |
57 | ||
58 | for (;; name++) { | |
59 | switch (*name) { | |
60 | case '0' ... '9': | |
61 | val = 10*val+(*name-'0'); | |
62 | break; | |
63 | default: | |
64 | return val; | |
65 | } | |
66 | } | |
67 | } | |
68 | ||
69 | /** | |
70 | * drm_fb_helper_connector_parse_command_line - parse command line for connector | |
71 | * @connector - connector to parse line for | |
72 | * @mode_option - per connector mode option | |
73 | * | |
74 | * This parses the connector specific then generic command lines for | |
75 | * modes and options to configure the connector. | |
76 | * | |
77 | * This uses the same parameters as the fb modedb.c, except for extra | |
78 | * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] | |
79 | * | |
80 | * enable/enable Digital/disable bit at the end | |
81 | */ | |
82 | static bool drm_fb_helper_connector_parse_command_line(struct drm_connector *connector, | |
83 | const char *mode_option) | |
84 | { | |
85 | const char *name; | |
86 | unsigned int namelen; | |
87 | int res_specified = 0, bpp_specified = 0, refresh_specified = 0; | |
88 | unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; | |
89 | int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0; | |
90 | int i; | |
91 | enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; | |
92 | struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private; | |
93 | struct drm_fb_helper_cmdline_mode *cmdline_mode = &fb_help_conn->cmdline_mode; | |
94 | ||
95 | if (!mode_option) | |
96 | mode_option = fb_mode_option; | |
97 | ||
98 | if (!mode_option) { | |
99 | cmdline_mode->specified = false; | |
100 | return false; | |
101 | } | |
102 | ||
103 | name = mode_option; | |
104 | namelen = strlen(name); | |
105 | for (i = namelen-1; i >= 0; i--) { | |
106 | switch (name[i]) { | |
107 | case '@': | |
108 | namelen = i; | |
109 | if (!refresh_specified && !bpp_specified && | |
110 | !yres_specified) { | |
111 | refresh = my_atoi(&name[i+1]); | |
112 | refresh_specified = 1; | |
113 | if (cvt || rb) | |
114 | cvt = 0; | |
115 | } else | |
116 | goto done; | |
117 | break; | |
118 | case '-': | |
119 | namelen = i; | |
120 | if (!bpp_specified && !yres_specified) { | |
121 | bpp = my_atoi(&name[i+1]); | |
122 | bpp_specified = 1; | |
123 | if (cvt || rb) | |
124 | cvt = 0; | |
125 | } else | |
126 | goto done; | |
127 | break; | |
128 | case 'x': | |
129 | if (!yres_specified) { | |
130 | yres = my_atoi(&name[i+1]); | |
131 | yres_specified = 1; | |
132 | } else | |
133 | goto done; | |
134 | case '0' ... '9': | |
135 | break; | |
136 | case 'M': | |
137 | if (!yres_specified) | |
138 | cvt = 1; | |
139 | break; | |
140 | case 'R': | |
141 | if (!cvt) | |
142 | rb = 1; | |
143 | break; | |
144 | case 'm': | |
145 | if (!cvt) | |
146 | margins = 1; | |
147 | break; | |
148 | case 'i': | |
149 | if (!cvt) | |
150 | interlace = 1; | |
151 | break; | |
152 | case 'e': | |
153 | force = DRM_FORCE_ON; | |
154 | break; | |
155 | case 'D': | |
156 | if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) || | |
157 | (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) | |
158 | force = DRM_FORCE_ON; | |
159 | else | |
160 | force = DRM_FORCE_ON_DIGITAL; | |
161 | break; | |
162 | case 'd': | |
163 | force = DRM_FORCE_OFF; | |
164 | break; | |
165 | default: | |
166 | goto done; | |
167 | } | |
168 | } | |
169 | if (i < 0 && yres_specified) { | |
170 | xres = my_atoi(name); | |
171 | res_specified = 1; | |
172 | } | |
173 | done: | |
174 | ||
175 | DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", | |
176 | drm_get_connector_name(connector), xres, yres, | |
177 | (refresh) ? refresh : 60, (rb) ? " reduced blanking" : | |
178 | "", (margins) ? " with margins" : "", (interlace) ? | |
179 | " interlaced" : ""); | |
180 | ||
181 | if (force) { | |
182 | const char *s; | |
183 | switch (force) { | |
184 | case DRM_FORCE_OFF: s = "OFF"; break; | |
185 | case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break; | |
186 | default: | |
187 | case DRM_FORCE_ON: s = "ON"; break; | |
188 | } | |
189 | ||
190 | DRM_INFO("forcing %s connector %s\n", | |
191 | drm_get_connector_name(connector), s); | |
192 | connector->force = force; | |
193 | } | |
194 | ||
195 | if (res_specified) { | |
196 | cmdline_mode->specified = true; | |
197 | cmdline_mode->xres = xres; | |
198 | cmdline_mode->yres = yres; | |
199 | } | |
200 | ||
201 | if (refresh_specified) { | |
202 | cmdline_mode->refresh_specified = true; | |
203 | cmdline_mode->refresh = refresh; | |
204 | } | |
205 | ||
206 | if (bpp_specified) { | |
207 | cmdline_mode->bpp_specified = true; | |
208 | cmdline_mode->bpp = bpp; | |
209 | } | |
210 | cmdline_mode->rb = rb ? true : false; | |
211 | cmdline_mode->cvt = cvt ? true : false; | |
212 | cmdline_mode->interlace = interlace ? true : false; | |
213 | ||
214 | return true; | |
215 | } | |
216 | ||
217 | int drm_fb_helper_parse_command_line(struct drm_device *dev) | |
218 | { | |
219 | struct drm_connector *connector; | |
220 | ||
221 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
222 | char *option = NULL; | |
223 | ||
224 | /* do something on return - turn off connector maybe */ | |
225 | if (fb_get_options(drm_get_connector_name(connector), &option)) | |
226 | continue; | |
227 | ||
228 | drm_fb_helper_connector_parse_command_line(connector, option); | |
229 | } | |
230 | return 0; | |
231 | } | |
232 | ||
785b93ef DA |
233 | bool drm_fb_helper_force_kernel_mode(void) |
234 | { | |
235 | int i = 0; | |
236 | bool ret, error = false; | |
237 | struct drm_fb_helper *helper; | |
238 | ||
239 | if (list_empty(&kernel_fb_helper_list)) | |
240 | return false; | |
241 | ||
242 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
243 | for (i = 0; i < helper->crtc_count; i++) { | |
244 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
245 | ret = drm_crtc_helper_set_config(mode_set); | |
246 | if (ret) | |
247 | error = true; | |
248 | } | |
249 | } | |
250 | return error; | |
251 | } | |
252 | ||
253 | int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, | |
254 | void *panic_str) | |
255 | { | |
256 | DRM_ERROR("panic occurred, switching back to text console\n"); | |
257 | return drm_fb_helper_force_kernel_mode(); | |
258 | return 0; | |
259 | } | |
260 | EXPORT_SYMBOL(drm_fb_helper_panic); | |
261 | ||
262 | static struct notifier_block paniced = { | |
263 | .notifier_call = drm_fb_helper_panic, | |
264 | }; | |
265 | ||
266 | /** | |
267 | * drm_fb_helper_restore - restore the framebuffer console (kernel) config | |
268 | * | |
269 | * Restore's the kernel's fbcon mode, used for lastclose & panic paths. | |
270 | */ | |
271 | void drm_fb_helper_restore(void) | |
272 | { | |
273 | bool ret; | |
274 | ret = drm_fb_helper_force_kernel_mode(); | |
275 | if (ret == true) | |
276 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
277 | } | |
278 | EXPORT_SYMBOL(drm_fb_helper_restore); | |
279 | ||
280 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) | |
281 | { | |
282 | drm_fb_helper_restore(); | |
283 | } | |
284 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
285 | ||
286 | static void drm_fb_helper_sysrq(int dummy1, struct tty_struct *dummy3) | |
287 | { | |
288 | schedule_work(&drm_fb_helper_restore_work); | |
289 | } | |
290 | ||
291 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
292 | .handler = drm_fb_helper_sysrq, | |
293 | .help_msg = "force-fb(V)", | |
294 | .action_msg = "Restore framebuffer console", | |
295 | }; | |
296 | ||
297 | static void drm_fb_helper_on(struct fb_info *info) | |
298 | { | |
299 | struct drm_fb_helper *fb_helper = info->par; | |
300 | struct drm_device *dev = fb_helper->dev; | |
301 | struct drm_crtc *crtc; | |
302 | struct drm_encoder *encoder; | |
303 | int i; | |
304 | ||
305 | /* | |
306 | * For each CRTC in this fb, turn the crtc on then, | |
307 | * find all associated encoders and turn them on. | |
308 | */ | |
e87b2c42 JB |
309 | for (i = 0; i < fb_helper->crtc_count; i++) { |
310 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
311 | struct drm_crtc_helper_funcs *crtc_funcs = | |
312 | crtc->helper_private; | |
785b93ef | 313 | |
e87b2c42 JB |
314 | /* Only mess with CRTCs in this fb */ |
315 | if (crtc->base.id != fb_helper->crtc_info[i].crtc_id || | |
316 | !crtc->enabled) | |
317 | continue; | |
785b93ef | 318 | |
e87b2c42 JB |
319 | mutex_lock(&dev->mode_config.mutex); |
320 | crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON); | |
321 | mutex_unlock(&dev->mode_config.mutex); | |
785b93ef | 322 | |
e87b2c42 JB |
323 | /* Found a CRTC on this fb, now find encoders */ |
324 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
325 | if (encoder->crtc == crtc) { | |
326 | struct drm_encoder_helper_funcs *encoder_funcs; | |
785b93ef | 327 | |
e87b2c42 JB |
328 | encoder_funcs = encoder->helper_private; |
329 | mutex_lock(&dev->mode_config.mutex); | |
330 | encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON); | |
331 | mutex_unlock(&dev->mode_config.mutex); | |
332 | } | |
785b93ef DA |
333 | } |
334 | } | |
335 | } | |
336 | } | |
337 | ||
338 | static void drm_fb_helper_off(struct fb_info *info, int dpms_mode) | |
339 | { | |
340 | struct drm_fb_helper *fb_helper = info->par; | |
341 | struct drm_device *dev = fb_helper->dev; | |
342 | struct drm_crtc *crtc; | |
343 | struct drm_encoder *encoder; | |
344 | int i; | |
345 | ||
346 | /* | |
347 | * For each CRTC in this fb, find all associated encoders | |
348 | * and turn them off, then turn off the CRTC. | |
349 | */ | |
e87b2c42 JB |
350 | for (i = 0; i < fb_helper->crtc_count; i++) { |
351 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
352 | struct drm_crtc_helper_funcs *crtc_funcs = | |
353 | crtc->helper_private; | |
354 | ||
355 | /* Only mess with CRTCs in this fb */ | |
356 | if (crtc->base.id != fb_helper->crtc_info[i].crtc_id || | |
357 | !crtc->enabled) | |
358 | continue; | |
359 | ||
360 | /* Found a CRTC on this fb, now find encoders */ | |
361 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
362 | if (encoder->crtc == crtc) { | |
363 | struct drm_encoder_helper_funcs *encoder_funcs; | |
364 | ||
365 | encoder_funcs = encoder->helper_private; | |
366 | mutex_lock(&dev->mode_config.mutex); | |
367 | encoder_funcs->dpms(encoder, dpms_mode); | |
368 | mutex_unlock(&dev->mode_config.mutex); | |
369 | } | |
370 | } | |
371 | if (dpms_mode == DRM_MODE_DPMS_OFF) { | |
785b93ef | 372 | mutex_lock(&dev->mode_config.mutex); |
e87b2c42 | 373 | crtc_funcs->dpms(crtc, dpms_mode); |
785b93ef DA |
374 | mutex_unlock(&dev->mode_config.mutex); |
375 | } | |
376 | } | |
785b93ef DA |
377 | } |
378 | } | |
379 | ||
380 | int drm_fb_helper_blank(int blank, struct fb_info *info) | |
381 | { | |
382 | switch (blank) { | |
383 | case FB_BLANK_UNBLANK: | |
384 | drm_fb_helper_on(info); | |
385 | break; | |
386 | case FB_BLANK_NORMAL: | |
387 | drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); | |
388 | break; | |
389 | case FB_BLANK_HSYNC_SUSPEND: | |
390 | drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); | |
391 | break; | |
392 | case FB_BLANK_VSYNC_SUSPEND: | |
393 | drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND); | |
394 | break; | |
395 | case FB_BLANK_POWERDOWN: | |
396 | drm_fb_helper_off(info, DRM_MODE_DPMS_OFF); | |
397 | break; | |
398 | } | |
399 | return 0; | |
400 | } | |
401 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
402 | ||
403 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
404 | { | |
405 | int i; | |
406 | ||
407 | for (i = 0; i < helper->crtc_count; i++) | |
408 | kfree(helper->crtc_info[i].mode_set.connectors); | |
409 | kfree(helper->crtc_info); | |
410 | } | |
411 | ||
412 | int drm_fb_helper_init_crtc_count(struct drm_fb_helper *helper, int crtc_count, int max_conn_count) | |
413 | { | |
414 | struct drm_device *dev = helper->dev; | |
415 | struct drm_crtc *crtc; | |
416 | int ret = 0; | |
417 | int i; | |
418 | ||
419 | helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); | |
420 | if (!helper->crtc_info) | |
421 | return -ENOMEM; | |
422 | ||
423 | helper->crtc_count = crtc_count; | |
424 | ||
425 | for (i = 0; i < crtc_count; i++) { | |
426 | helper->crtc_info[i].mode_set.connectors = | |
427 | kcalloc(max_conn_count, | |
428 | sizeof(struct drm_connector *), | |
429 | GFP_KERNEL); | |
430 | ||
431 | if (!helper->crtc_info[i].mode_set.connectors) { | |
432 | ret = -ENOMEM; | |
433 | goto out_free; | |
434 | } | |
435 | helper->crtc_info[i].mode_set.num_connectors = 0; | |
436 | } | |
437 | ||
438 | i = 0; | |
439 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
440 | helper->crtc_info[i].crtc_id = crtc->base.id; | |
441 | helper->crtc_info[i].mode_set.crtc = crtc; | |
442 | i++; | |
443 | } | |
444 | helper->conn_limit = max_conn_count; | |
445 | return 0; | |
446 | out_free: | |
447 | drm_fb_helper_crtc_free(helper); | |
448 | return -ENOMEM; | |
449 | } | |
450 | EXPORT_SYMBOL(drm_fb_helper_init_crtc_count); | |
451 | ||
452 | int drm_fb_helper_setcolreg(unsigned regno, | |
453 | unsigned red, | |
454 | unsigned green, | |
455 | unsigned blue, | |
456 | unsigned transp, | |
457 | struct fb_info *info) | |
458 | { | |
459 | struct drm_fb_helper *fb_helper = info->par; | |
460 | struct drm_device *dev = fb_helper->dev; | |
461 | struct drm_crtc *crtc; | |
462 | int i; | |
463 | ||
464 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
465 | struct drm_framebuffer *fb = fb_helper->fb; | |
466 | ||
467 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
468 | if (crtc->base.id == fb_helper->crtc_info[i].crtc_id) | |
469 | break; | |
470 | } | |
471 | if (i == fb_helper->crtc_count) | |
472 | continue; | |
473 | ||
474 | if (regno > 255) | |
475 | return 1; | |
476 | ||
477 | if (fb->depth == 8) { | |
478 | fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); | |
479 | return 0; | |
480 | } | |
481 | ||
482 | if (regno < 16) { | |
483 | switch (fb->depth) { | |
484 | case 15: | |
485 | fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) | | |
486 | ((green & 0xf800) >> 6) | | |
487 | ((blue & 0xf800) >> 11); | |
488 | break; | |
489 | case 16: | |
490 | fb->pseudo_palette[regno] = (red & 0xf800) | | |
491 | ((green & 0xfc00) >> 5) | | |
492 | ((blue & 0xf800) >> 11); | |
493 | break; | |
494 | case 24: | |
495 | case 32: | |
496 | fb->pseudo_palette[regno] = | |
497 | (((red >> 8) & 0xff) << info->var.red.offset) | | |
498 | (((green >> 8) & 0xff) << info->var.green.offset) | | |
499 | (((blue >> 8) & 0xff) << info->var.blue.offset); | |
500 | break; | |
501 | } | |
502 | } | |
503 | } | |
504 | return 0; | |
505 | } | |
506 | EXPORT_SYMBOL(drm_fb_helper_setcolreg); | |
507 | ||
508 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, | |
509 | struct fb_info *info) | |
510 | { | |
511 | struct drm_fb_helper *fb_helper = info->par; | |
512 | struct drm_framebuffer *fb = fb_helper->fb; | |
513 | int depth; | |
514 | ||
515 | if (var->pixclock == -1 || !var->pixclock) | |
516 | return -EINVAL; | |
517 | ||
518 | /* Need to resize the fb object !!! */ | |
519 | if (var->xres > fb->width || var->yres > fb->height) { | |
520 | DRM_ERROR("Requested width/height is greater than current fb " | |
521 | "object %dx%d > %dx%d\n", var->xres, var->yres, | |
522 | fb->width, fb->height); | |
523 | DRM_ERROR("Need resizing code.\n"); | |
524 | return -EINVAL; | |
525 | } | |
526 | ||
527 | switch (var->bits_per_pixel) { | |
528 | case 16: | |
529 | depth = (var->green.length == 6) ? 16 : 15; | |
530 | break; | |
531 | case 32: | |
532 | depth = (var->transp.length > 0) ? 32 : 24; | |
533 | break; | |
534 | default: | |
535 | depth = var->bits_per_pixel; | |
536 | break; | |
537 | } | |
538 | ||
539 | switch (depth) { | |
540 | case 8: | |
541 | var->red.offset = 0; | |
542 | var->green.offset = 0; | |
543 | var->blue.offset = 0; | |
544 | var->red.length = 8; | |
545 | var->green.length = 8; | |
546 | var->blue.length = 8; | |
547 | var->transp.length = 0; | |
548 | var->transp.offset = 0; | |
549 | break; | |
550 | case 15: | |
551 | var->red.offset = 10; | |
552 | var->green.offset = 5; | |
553 | var->blue.offset = 0; | |
554 | var->red.length = 5; | |
555 | var->green.length = 5; | |
556 | var->blue.length = 5; | |
557 | var->transp.length = 1; | |
558 | var->transp.offset = 15; | |
559 | break; | |
560 | case 16: | |
561 | var->red.offset = 11; | |
562 | var->green.offset = 5; | |
563 | var->blue.offset = 0; | |
564 | var->red.length = 5; | |
565 | var->green.length = 6; | |
566 | var->blue.length = 5; | |
567 | var->transp.length = 0; | |
568 | var->transp.offset = 0; | |
569 | break; | |
570 | case 24: | |
571 | var->red.offset = 16; | |
572 | var->green.offset = 8; | |
573 | var->blue.offset = 0; | |
574 | var->red.length = 8; | |
575 | var->green.length = 8; | |
576 | var->blue.length = 8; | |
577 | var->transp.length = 0; | |
578 | var->transp.offset = 0; | |
579 | break; | |
580 | case 32: | |
581 | var->red.offset = 16; | |
582 | var->green.offset = 8; | |
583 | var->blue.offset = 0; | |
584 | var->red.length = 8; | |
585 | var->green.length = 8; | |
586 | var->blue.length = 8; | |
587 | var->transp.length = 8; | |
588 | var->transp.offset = 24; | |
589 | break; | |
590 | default: | |
591 | return -EINVAL; | |
592 | } | |
593 | return 0; | |
594 | } | |
595 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
596 | ||
597 | /* this will let fbcon do the mode init */ | |
598 | int drm_fb_helper_set_par(struct fb_info *info) | |
599 | { | |
600 | struct drm_fb_helper *fb_helper = info->par; | |
601 | struct drm_device *dev = fb_helper->dev; | |
602 | struct fb_var_screeninfo *var = &info->var; | |
603 | struct drm_crtc *crtc; | |
604 | int ret; | |
605 | int i; | |
606 | ||
607 | if (var->pixclock != -1) { | |
608 | DRM_ERROR("PIXEL CLCOK SET\n"); | |
609 | return -EINVAL; | |
610 | } | |
611 | ||
612 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
613 | ||
614 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
615 | if (crtc->base.id == fb_helper->crtc_info[i].crtc_id) | |
616 | break; | |
617 | } | |
618 | if (i == fb_helper->crtc_count) | |
619 | continue; | |
620 | ||
621 | if (crtc->fb == fb_helper->crtc_info[i].mode_set.fb) { | |
622 | mutex_lock(&dev->mode_config.mutex); | |
623 | ret = crtc->funcs->set_config(&fb_helper->crtc_info->mode_set); | |
624 | mutex_unlock(&dev->mode_config.mutex); | |
625 | if (ret) | |
626 | return ret; | |
627 | } | |
628 | } | |
629 | return 0; | |
630 | } | |
631 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
632 | ||
633 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, | |
634 | struct fb_info *info) | |
635 | { | |
636 | struct drm_fb_helper *fb_helper = info->par; | |
637 | struct drm_device *dev = fb_helper->dev; | |
638 | struct drm_mode_set *modeset; | |
639 | struct drm_crtc *crtc; | |
640 | int ret = 0; | |
641 | int i; | |
642 | ||
643 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
644 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
645 | if (crtc->base.id == fb_helper->crtc_info[i].crtc_id) | |
646 | break; | |
647 | } | |
648 | ||
649 | if (i == fb_helper->crtc_count) | |
650 | continue; | |
651 | ||
652 | modeset = &fb_helper->crtc_info[i].mode_set; | |
653 | ||
654 | modeset->x = var->xoffset; | |
655 | modeset->y = var->yoffset; | |
656 | ||
657 | if (modeset->num_connectors) { | |
658 | mutex_lock(&dev->mode_config.mutex); | |
659 | ret = crtc->funcs->set_config(modeset); | |
660 | mutex_unlock(&dev->mode_config.mutex); | |
661 | if (!ret) { | |
662 | info->var.xoffset = var->xoffset; | |
663 | info->var.yoffset = var->yoffset; | |
664 | } | |
665 | } | |
666 | } | |
667 | return ret; | |
668 | } | |
669 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
670 | ||
671 | int drm_fb_helper_single_fb_probe(struct drm_device *dev, | |
672 | int (*fb_create)(struct drm_device *dev, | |
673 | uint32_t fb_width, | |
674 | uint32_t fb_height, | |
675 | uint32_t surface_width, | |
676 | uint32_t surface_height, | |
d50ba256 DA |
677 | uint32_t surface_depth, |
678 | uint32_t surface_bpp, | |
785b93ef DA |
679 | struct drm_framebuffer **fb_ptr)) |
680 | { | |
681 | struct drm_crtc *crtc; | |
682 | struct drm_connector *connector; | |
683 | unsigned int fb_width = (unsigned)-1, fb_height = (unsigned)-1; | |
684 | unsigned int surface_width = 0, surface_height = 0; | |
685 | int new_fb = 0; | |
686 | int crtc_count = 0; | |
687 | int ret, i, conn_count = 0; | |
688 | struct fb_info *info; | |
689 | struct drm_framebuffer *fb; | |
690 | struct drm_mode_set *modeset = NULL; | |
691 | struct drm_fb_helper *fb_helper; | |
d50ba256 | 692 | uint32_t surface_depth = 24, surface_bpp = 32; |
785b93ef DA |
693 | |
694 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ | |
d50ba256 DA |
695 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
696 | struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private; | |
697 | struct drm_fb_helper_cmdline_mode *cmdline_mode = &fb_help_conn->cmdline_mode; | |
698 | ||
699 | if (cmdline_mode->bpp_specified) { | |
700 | switch (cmdline_mode->bpp) { | |
701 | case 8: | |
702 | surface_depth = surface_bpp = 8; | |
703 | break; | |
704 | case 15: | |
705 | surface_depth = 15; | |
706 | surface_bpp = 16; | |
707 | break; | |
708 | case 16: | |
709 | surface_depth = surface_bpp = 16; | |
710 | break; | |
711 | case 24: | |
712 | surface_depth = surface_bpp = 24; | |
713 | break; | |
714 | case 32: | |
715 | surface_depth = 24; | |
716 | surface_bpp = 32; | |
717 | break; | |
718 | } | |
719 | break; | |
720 | } | |
721 | } | |
722 | ||
785b93ef DA |
723 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
724 | if (drm_helper_crtc_in_use(crtc)) { | |
725 | if (crtc->desired_mode) { | |
726 | if (crtc->desired_mode->hdisplay < fb_width) | |
727 | fb_width = crtc->desired_mode->hdisplay; | |
728 | ||
729 | if (crtc->desired_mode->vdisplay < fb_height) | |
730 | fb_height = crtc->desired_mode->vdisplay; | |
731 | ||
732 | if (crtc->desired_mode->hdisplay > surface_width) | |
733 | surface_width = crtc->desired_mode->hdisplay; | |
734 | ||
735 | if (crtc->desired_mode->vdisplay > surface_height) | |
736 | surface_height = crtc->desired_mode->vdisplay; | |
737 | } | |
738 | crtc_count++; | |
739 | } | |
740 | } | |
741 | ||
742 | if (crtc_count == 0 || fb_width == -1 || fb_height == -1) { | |
743 | /* hmm everyone went away - assume VGA cable just fell out | |
744 | and will come back later. */ | |
745 | return 0; | |
746 | } | |
747 | ||
748 | /* do we have an fb already? */ | |
749 | if (list_empty(&dev->mode_config.fb_kernel_list)) { | |
750 | ret = (*fb_create)(dev, fb_width, fb_height, surface_width, | |
d50ba256 DA |
751 | surface_height, surface_depth, surface_bpp, |
752 | &fb); | |
785b93ef DA |
753 | if (ret) |
754 | return -EINVAL; | |
755 | new_fb = 1; | |
756 | } else { | |
757 | fb = list_first_entry(&dev->mode_config.fb_kernel_list, | |
758 | struct drm_framebuffer, filp_head); | |
759 | ||
760 | /* if someone hotplugs something bigger than we have already allocated, we are pwned. | |
761 | As really we can't resize an fbdev that is in the wild currently due to fbdev | |
762 | not really being designed for the lower layers moving stuff around under it. | |
763 | - so in the grand style of things - punt. */ | |
764 | if ((fb->width < surface_width) || | |
765 | (fb->height < surface_height)) { | |
766 | DRM_ERROR("Framebuffer not large enough to scale console onto.\n"); | |
767 | return -EINVAL; | |
768 | } | |
769 | } | |
770 | ||
771 | info = fb->fbdev; | |
772 | fb_helper = info->par; | |
773 | ||
774 | crtc_count = 0; | |
775 | /* okay we need to setup new connector sets in the crtcs */ | |
776 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
777 | modeset = &fb_helper->crtc_info[crtc_count].mode_set; | |
778 | modeset->fb = fb; | |
779 | conn_count = 0; | |
780 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
781 | if (connector->encoder) | |
782 | if (connector->encoder->crtc == modeset->crtc) { | |
783 | modeset->connectors[conn_count] = connector; | |
784 | conn_count++; | |
785 | if (conn_count > fb_helper->conn_limit) | |
786 | BUG(); | |
787 | } | |
788 | } | |
789 | ||
790 | for (i = conn_count; i < fb_helper->conn_limit; i++) | |
791 | modeset->connectors[i] = NULL; | |
792 | ||
793 | modeset->crtc = crtc; | |
794 | crtc_count++; | |
795 | ||
796 | modeset->num_connectors = conn_count; | |
797 | if (modeset->crtc->desired_mode) { | |
798 | if (modeset->mode) | |
799 | drm_mode_destroy(dev, modeset->mode); | |
800 | modeset->mode = drm_mode_duplicate(dev, | |
801 | modeset->crtc->desired_mode); | |
802 | } | |
803 | } | |
804 | fb_helper->crtc_count = crtc_count; | |
805 | fb_helper->fb = fb; | |
806 | ||
807 | if (new_fb) { | |
808 | info->var.pixclock = -1; | |
809 | if (register_framebuffer(info) < 0) | |
810 | return -EINVAL; | |
811 | } else { | |
812 | drm_fb_helper_set_par(info); | |
813 | } | |
814 | printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, | |
815 | info->fix.id); | |
816 | ||
817 | /* Switch back to kernel console on panic */ | |
818 | /* multi card linked list maybe */ | |
819 | if (list_empty(&kernel_fb_helper_list)) { | |
820 | printk(KERN_INFO "registered panic notifier\n"); | |
821 | atomic_notifier_chain_register(&panic_notifier_list, | |
822 | &paniced); | |
823 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
824 | } | |
825 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
826 | return 0; | |
827 | } | |
828 | EXPORT_SYMBOL(drm_fb_helper_single_fb_probe); | |
829 | ||
830 | void drm_fb_helper_free(struct drm_fb_helper *helper) | |
831 | { | |
832 | list_del(&helper->kernel_fb_list); | |
833 | if (list_empty(&kernel_fb_helper_list)) { | |
834 | printk(KERN_INFO "unregistered panic notifier\n"); | |
835 | atomic_notifier_chain_unregister(&panic_notifier_list, | |
836 | &paniced); | |
837 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
838 | } | |
839 | drm_fb_helper_crtc_free(helper); | |
840 | } | |
841 | EXPORT_SYMBOL(drm_fb_helper_free); | |
842 | ||
843 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch) | |
844 | { | |
845 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
846 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
847 | info->fix.type_aux = 0; | |
848 | info->fix.xpanstep = 1; /* doing it in hw */ | |
849 | info->fix.ypanstep = 1; /* doing it in hw */ | |
850 | info->fix.ywrapstep = 0; | |
3420e742 | 851 | info->fix.accel = FB_ACCEL_NONE; |
785b93ef DA |
852 | info->fix.type_aux = 0; |
853 | ||
854 | info->fix.line_length = pitch; | |
855 | return; | |
856 | } | |
857 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
858 | ||
859 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_framebuffer *fb, | |
860 | uint32_t fb_width, uint32_t fb_height) | |
861 | { | |
862 | info->pseudo_palette = fb->pseudo_palette; | |
863 | info->var.xres_virtual = fb->width; | |
864 | info->var.yres_virtual = fb->height; | |
865 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
866 | info->var.xoffset = 0; | |
867 | info->var.yoffset = 0; | |
868 | info->var.activate = FB_ACTIVATE_NOW; | |
869 | info->var.height = -1; | |
870 | info->var.width = -1; | |
871 | ||
872 | switch (fb->depth) { | |
873 | case 8: | |
874 | info->var.red.offset = 0; | |
875 | info->var.green.offset = 0; | |
876 | info->var.blue.offset = 0; | |
877 | info->var.red.length = 8; /* 8bit DAC */ | |
878 | info->var.green.length = 8; | |
879 | info->var.blue.length = 8; | |
880 | info->var.transp.offset = 0; | |
881 | info->var.transp.length = 0; | |
882 | break; | |
883 | case 15: | |
884 | info->var.red.offset = 10; | |
885 | info->var.green.offset = 5; | |
886 | info->var.blue.offset = 0; | |
887 | info->var.red.length = 5; | |
888 | info->var.green.length = 5; | |
889 | info->var.blue.length = 5; | |
890 | info->var.transp.offset = 15; | |
891 | info->var.transp.length = 1; | |
892 | break; | |
893 | case 16: | |
894 | info->var.red.offset = 11; | |
895 | info->var.green.offset = 5; | |
896 | info->var.blue.offset = 0; | |
897 | info->var.red.length = 5; | |
898 | info->var.green.length = 6; | |
899 | info->var.blue.length = 5; | |
900 | info->var.transp.offset = 0; | |
901 | break; | |
902 | case 24: | |
903 | info->var.red.offset = 16; | |
904 | info->var.green.offset = 8; | |
905 | info->var.blue.offset = 0; | |
906 | info->var.red.length = 8; | |
907 | info->var.green.length = 8; | |
908 | info->var.blue.length = 8; | |
909 | info->var.transp.offset = 0; | |
910 | info->var.transp.length = 0; | |
911 | break; | |
912 | case 32: | |
913 | info->var.red.offset = 16; | |
914 | info->var.green.offset = 8; | |
915 | info->var.blue.offset = 0; | |
916 | info->var.red.length = 8; | |
917 | info->var.green.length = 8; | |
918 | info->var.blue.length = 8; | |
919 | info->var.transp.offset = 24; | |
920 | info->var.transp.length = 8; | |
921 | break; | |
922 | default: | |
923 | break; | |
924 | } | |
925 | ||
926 | info->var.xres = fb_width; | |
927 | info->var.yres = fb_height; | |
928 | } | |
929 | EXPORT_SYMBOL(drm_fb_helper_fill_var); |