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79e53945 JB |
1 | /* |
2 | * Copyright © 2007 David Airlie | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
21 | * DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * David Airlie | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/mm.h> | |
32 | #include <linux/tty.h> | |
79e53945 JB |
33 | #include <linux/sysrq.h> |
34 | #include <linux/delay.h> | |
35 | #include <linux/fb.h> | |
36 | #include <linux/init.h> | |
6a9ee8af | 37 | #include <linux/vga_switcheroo.h> |
79e53945 | 38 | |
760285e7 DH |
39 | #include <drm/drmP.h> |
40 | #include <drm/drm_crtc.h> | |
41 | #include <drm/drm_fb_helper.h> | |
79e53945 | 42 | #include "intel_drv.h" |
760285e7 | 43 | #include <drm/i915_drm.h> |
79e53945 JB |
44 | #include "i915_drv.h" |
45 | ||
79e53945 JB |
46 | static struct fb_ops intelfb_ops = { |
47 | .owner = THIS_MODULE, | |
785b93ef DA |
48 | .fb_check_var = drm_fb_helper_check_var, |
49 | .fb_set_par = drm_fb_helper_set_par, | |
79e53945 JB |
50 | .fb_fillrect = cfb_fillrect, |
51 | .fb_copyarea = cfb_copyarea, | |
52 | .fb_imageblit = cfb_imageblit, | |
785b93ef DA |
53 | .fb_pan_display = drm_fb_helper_pan_display, |
54 | .fb_blank = drm_fb_helper_blank, | |
068143d3 | 55 | .fb_setcmap = drm_fb_helper_setcmap, |
81255565 JB |
56 | .fb_debug_enter = drm_fb_helper_debug_enter, |
57 | .fb_debug_leave = drm_fb_helper_debug_leave, | |
79e53945 JB |
58 | }; |
59 | ||
8b4f49e0 JB |
60 | static int intelfb_alloc(struct drm_fb_helper *helper, |
61 | struct drm_fb_helper_surface_size *sizes) | |
79e53945 | 62 | { |
3430824b VS |
63 | struct intel_fbdev *ifbdev = |
64 | container_of(helper, struct intel_fbdev, helper); | |
a8bb6818 | 65 | struct drm_framebuffer *fb; |
3430824b | 66 | struct drm_device *dev = helper->dev; |
3a7f2f6a | 67 | struct drm_mode_fb_cmd2 mode_cmd = {}; |
05394f39 | 68 | struct drm_i915_gem_object *obj; |
57084d05 | 69 | int size, ret; |
79e53945 | 70 | |
b8c00ac5 | 71 | /* we don't do packed 24bpp */ |
38651674 DA |
72 | if (sizes->surface_bpp == 24) |
73 | sizes->surface_bpp = 32; | |
b8c00ac5 | 74 | |
38651674 DA |
75 | mode_cmd.width = sizes->surface_width; |
76 | mode_cmd.height = sizes->surface_height; | |
79e53945 | 77 | |
de45eaf7 PZ |
78 | mode_cmd.pitches[0] = ALIGN(mode_cmd.width * |
79 | DIV_ROUND_UP(sizes->surface_bpp, 8), 64); | |
308e5bcb JB |
80 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, |
81 | sizes->surface_depth); | |
79e53945 | 82 | |
308e5bcb | 83 | size = mode_cmd.pitches[0] * mode_cmd.height; |
79e53945 | 84 | size = ALIGN(size, PAGE_SIZE); |
0ffb0ff2 CW |
85 | obj = i915_gem_object_create_stolen(dev, size); |
86 | if (obj == NULL) | |
87 | obj = i915_gem_alloc_object(dev, size); | |
05394f39 | 88 | if (!obj) { |
1ae8c0a5 | 89 | DRM_ERROR("failed to allocate framebuffer\n"); |
79e53945 JB |
90 | ret = -ENOMEM; |
91 | goto out; | |
92 | } | |
79e53945 | 93 | |
7213342d | 94 | /* Flush everything out, we'll be doing GTT only from now on */ |
c43b5634 | 95 | ret = intel_pin_and_fence_fb_obj(dev, obj, NULL); |
79e53945 | 96 | if (ret) { |
a8bb6818 | 97 | DRM_ERROR("failed to pin obj: %d\n", ret); |
79e53945 JB |
98 | goto out_unref; |
99 | } | |
100 | ||
a8bb6818 DV |
101 | fb = __intel_framebuffer_create(dev, &mode_cmd, obj); |
102 | if (IS_ERR(fb)) { | |
103 | ret = PTR_ERR(fb); | |
8b4f49e0 | 104 | goto out_unpin; |
a8bb6818 DV |
105 | } |
106 | ||
107 | ifbdev->fb = to_intel_framebuffer(fb); | |
8b4f49e0 JB |
108 | |
109 | return 0; | |
110 | ||
111 | out_unpin: | |
d7f46fc4 | 112 | i915_gem_object_ggtt_unpin(obj); |
8b4f49e0 JB |
113 | out_unref: |
114 | drm_gem_object_unreference(&obj->base); | |
115 | out: | |
116 | return ret; | |
117 | } | |
118 | ||
119 | static int intelfb_create(struct drm_fb_helper *helper, | |
120 | struct drm_fb_helper_surface_size *sizes) | |
121 | { | |
122 | struct intel_fbdev *ifbdev = | |
123 | container_of(helper, struct intel_fbdev, helper); | |
8bcd4553 | 124 | struct intel_framebuffer *intel_fb = ifbdev->fb; |
8b4f49e0 JB |
125 | struct drm_device *dev = helper->dev; |
126 | struct drm_i915_private *dev_priv = dev->dev_private; | |
127 | struct fb_info *info; | |
128 | struct drm_framebuffer *fb; | |
129 | struct drm_i915_gem_object *obj; | |
130 | int size, ret; | |
d978ef14 | 131 | bool prealloc = false; |
8b4f49e0 JB |
132 | |
133 | mutex_lock(&dev->struct_mutex); | |
134 | ||
edd586fe CW |
135 | if (intel_fb && |
136 | (sizes->fb_width > intel_fb->base.width || | |
137 | sizes->fb_height > intel_fb->base.height)) { | |
138 | DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," | |
139 | " releasing it\n", | |
140 | intel_fb->base.width, intel_fb->base.height, | |
141 | sizes->fb_width, sizes->fb_height); | |
142 | drm_framebuffer_unreference(&intel_fb->base); | |
143 | intel_fb = ifbdev->fb = NULL; | |
144 | } | |
8bcd4553 | 145 | if (!intel_fb || WARN_ON(!intel_fb->obj)) { |
48e92120 | 146 | DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); |
8b4f49e0 JB |
147 | ret = intelfb_alloc(helper, sizes); |
148 | if (ret) | |
149 | goto out_unlock; | |
8bcd4553 | 150 | intel_fb = ifbdev->fb; |
8b4f49e0 | 151 | } else { |
48e92120 | 152 | DRM_DEBUG_KMS("re-using BIOS fb\n"); |
d978ef14 | 153 | prealloc = true; |
8b4f49e0 JB |
154 | sizes->fb_width = intel_fb->base.width; |
155 | sizes->fb_height = intel_fb->base.height; | |
156 | } | |
157 | ||
158 | obj = intel_fb->obj; | |
159 | size = obj->base.size; | |
160 | ||
161 | info = framebuffer_alloc(0, &dev->pdev->dev); | |
79e53945 JB |
162 | if (!info) { |
163 | ret = -ENOMEM; | |
b4476f52 | 164 | goto out_unpin; |
79e53945 JB |
165 | } |
166 | ||
3430824b | 167 | info->par = helper; |
79e53945 | 168 | |
8bcd4553 | 169 | fb = &ifbdev->fb->base; |
79e53945 | 170 | |
38651674 DA |
171 | ifbdev->helper.fb = fb; |
172 | ifbdev->helper.fbdev = info; | |
785b93ef | 173 | |
79e53945 | 174 | strcpy(info->fix.id, "inteldrmfb"); |
79e53945 | 175 | |
8fd4bd22 | 176 | info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; |
79e53945 JB |
177 | info->fbops = &intelfb_ops; |
178 | ||
35c3047a CW |
179 | ret = fb_alloc_cmap(&info->cmap, 256, 0); |
180 | if (ret) { | |
181 | ret = -ENOMEM; | |
182 | goto out_unpin; | |
183 | } | |
4410f391 | 184 | /* setup aperture base/size for vesafb takeover */ |
1471ca9a MS |
185 | info->apertures = alloc_apertures(1); |
186 | if (!info->apertures) { | |
187 | ret = -ENOMEM; | |
188 | goto out_unpin; | |
189 | } | |
190 | info->apertures->ranges[0].base = dev->mode_config.fb_base; | |
93d18799 | 191 | info->apertures->ranges[0].size = dev_priv->gtt.mappable_end; |
4410f391 | 192 | |
f343c5f6 | 193 | info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); |
79e53945 JB |
194 | info->fix.smem_len = size; |
195 | ||
dd2757f8 | 196 | info->screen_base = |
f343c5f6 | 197 | ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj), |
dd2757f8 | 198 | size); |
79e53945 JB |
199 | if (!info->screen_base) { |
200 | ret = -ENOSPC; | |
b4476f52 | 201 | goto out_unpin; |
79e53945 JB |
202 | } |
203 | info->screen_size = size; | |
204 | ||
24576d23 JB |
205 | /* This driver doesn't need a VT switch to restore the mode on resume */ |
206 | info->skip_vt_switch = true; | |
207 | ||
01f2c773 | 208 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); |
38651674 | 209 | drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); |
79e53945 | 210 | |
88afe715 CW |
211 | /* If the object is shmemfs backed, it will have given us zeroed pages. |
212 | * If the object is stolen however, it will be full of whatever | |
213 | * garbage was left in there. | |
214 | */ | |
d978ef14 | 215 | if (ifbdev->fb->obj->stolen && !prealloc) |
88afe715 CW |
216 | memset_io(info->screen_base, 0, info->screen_size); |
217 | ||
fb2a99e1 | 218 | /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ |
79e53945 | 219 | |
f343c5f6 | 220 | DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n", |
8be48d92 | 221 | fb->width, fb->height, |
f343c5f6 | 222 | i915_gem_obj_ggtt_offset(obj), obj); |
79e53945 JB |
223 | |
224 | mutex_unlock(&dev->struct_mutex); | |
6a9ee8af | 225 | vga_switcheroo_client_fb_set(dev->pdev, info); |
79e53945 JB |
226 | return 0; |
227 | ||
b4476f52 | 228 | out_unpin: |
d7f46fc4 | 229 | i915_gem_object_ggtt_unpin(obj); |
05394f39 | 230 | drm_gem_object_unreference(&obj->base); |
8b4f49e0 | 231 | out_unlock: |
79e53945 | 232 | mutex_unlock(&dev->struct_mutex); |
79e53945 JB |
233 | return ret; |
234 | } | |
235 | ||
67437680 PZ |
236 | /** Sets the color ramps on behalf of RandR */ |
237 | static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, | |
238 | u16 blue, int regno) | |
239 | { | |
240 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
241 | ||
242 | intel_crtc->lut_r[regno] = red >> 8; | |
243 | intel_crtc->lut_g[regno] = green >> 8; | |
244 | intel_crtc->lut_b[regno] = blue >> 8; | |
245 | } | |
246 | ||
247 | static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, | |
248 | u16 *blue, int regno) | |
249 | { | |
250 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
251 | ||
252 | *red = intel_crtc->lut_r[regno] << 8; | |
253 | *green = intel_crtc->lut_g[regno] << 8; | |
254 | *blue = intel_crtc->lut_b[regno] << 8; | |
255 | } | |
256 | ||
eb1bfe80 JB |
257 | static struct drm_fb_helper_crtc * |
258 | intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) | |
259 | { | |
260 | int i; | |
261 | ||
262 | for (i = 0; i < fb_helper->crtc_count; i++) | |
263 | if (fb_helper->crtc_info[i].mode_set.crtc == crtc) | |
264 | return &fb_helper->crtc_info[i]; | |
265 | ||
266 | return NULL; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Try to read the BIOS display configuration and use it for the initial | |
271 | * fb configuration. | |
272 | * | |
273 | * The BIOS or boot loader will generally create an initial display | |
274 | * configuration for us that includes some set of active pipes and displays. | |
275 | * This routine tries to figure out which pipes and connectors are active | |
276 | * and stuffs them into the crtcs and modes array given to us by the | |
277 | * drm_fb_helper code. | |
278 | * | |
279 | * The overall sequence is: | |
280 | * intel_fbdev_init - from driver load | |
281 | * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data | |
282 | * drm_fb_helper_init - build fb helper structs | |
283 | * drm_fb_helper_single_add_all_connectors - more fb helper structs | |
284 | * intel_fbdev_initial_config - apply the config | |
285 | * drm_fb_helper_initial_config - call ->probe then register_framebuffer() | |
286 | * drm_setup_crtcs - build crtc config for fbdev | |
287 | * intel_fb_initial_config - find active connectors etc | |
288 | * drm_fb_helper_single_fb_probe - set up fbdev | |
289 | * intelfb_create - re-use or alloc fb, build out fbdev structs | |
290 | * | |
291 | * Note that we don't make special consideration whether we could actually | |
292 | * switch to the selected modes without a full modeset. E.g. when the display | |
293 | * is in VGA mode we need to recalculate watermarks and set a new high-res | |
294 | * framebuffer anyway. | |
295 | */ | |
296 | static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, | |
297 | struct drm_fb_helper_crtc **crtcs, | |
298 | struct drm_display_mode **modes, | |
299 | bool *enabled, int width, int height) | |
300 | { | |
02f5eebb | 301 | struct drm_device *dev = fb_helper->dev; |
eb1bfe80 | 302 | int i, j; |
02f5eebb | 303 | bool *save_enabled; |
7c2bb531 | 304 | bool fallback = true; |
7e696e4c DV |
305 | int num_connectors_enabled = 0; |
306 | int num_connectors_detected = 0; | |
02f5eebb | 307 | |
ef34ab89 JB |
308 | /* |
309 | * If the user specified any force options, just bail here | |
310 | * and use that config. | |
311 | */ | |
312 | for (i = 0; i < fb_helper->connector_count; i++) { | |
313 | struct drm_fb_helper_connector *fb_conn; | |
314 | struct drm_connector *connector; | |
315 | ||
316 | fb_conn = fb_helper->connector_info[i]; | |
317 | connector = fb_conn->connector; | |
318 | ||
319 | if (!enabled[i]) | |
320 | continue; | |
321 | ||
322 | if (connector->force != DRM_FORCE_UNSPECIFIED) | |
323 | return false; | |
324 | } | |
325 | ||
02f5eebb JB |
326 | save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), |
327 | GFP_KERNEL); | |
328 | if (!save_enabled) | |
329 | return false; | |
330 | ||
331 | memcpy(save_enabled, enabled, dev->mode_config.num_connector); | |
eb1bfe80 JB |
332 | |
333 | for (i = 0; i < fb_helper->connector_count; i++) { | |
334 | struct drm_fb_helper_connector *fb_conn; | |
335 | struct drm_connector *connector; | |
336 | struct drm_encoder *encoder; | |
337 | struct drm_fb_helper_crtc *new_crtc; | |
338 | ||
339 | fb_conn = fb_helper->connector_info[i]; | |
340 | connector = fb_conn->connector; | |
7e696e4c DV |
341 | |
342 | if (connector->status == connector_status_connected) | |
343 | num_connectors_detected++; | |
344 | ||
eb1bfe80 JB |
345 | if (!enabled[i]) { |
346 | DRM_DEBUG_KMS("connector %d not enabled, skipping\n", | |
347 | connector->base.id); | |
348 | continue; | |
349 | } | |
350 | ||
351 | encoder = connector->encoder; | |
352 | if (!encoder || WARN_ON(!encoder->crtc)) { | |
353 | DRM_DEBUG_KMS("connector %d has no encoder or crtc, skipping\n", | |
354 | connector->base.id); | |
355 | enabled[i] = false; | |
356 | continue; | |
357 | } | |
358 | ||
7e696e4c DV |
359 | num_connectors_enabled++; |
360 | ||
eb1bfe80 JB |
361 | new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc); |
362 | ||
363 | /* | |
364 | * Make sure we're not trying to drive multiple connectors | |
365 | * with a single CRTC, since our cloning support may not | |
366 | * match the BIOS. | |
367 | */ | |
368 | for (j = 0; j < fb_helper->connector_count; j++) { | |
02f5eebb | 369 | if (crtcs[j] == new_crtc) { |
7e696e4c | 370 | DRM_DEBUG_KMS("fallback: cloned configuration\n"); |
7c2bb531 | 371 | fallback = true; |
02f5eebb JB |
372 | goto out; |
373 | } | |
eb1bfe80 JB |
374 | } |
375 | ||
376 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", | |
377 | fb_conn->connector->base.id); | |
378 | ||
379 | /* go for command line mode first */ | |
380 | modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); | |
381 | ||
382 | /* try for preferred next */ | |
383 | if (!modes[i]) { | |
384 | DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", | |
385 | fb_conn->connector->base.id); | |
386 | modes[i] = drm_has_preferred_mode(fb_conn, width, | |
387 | height); | |
388 | } | |
389 | ||
390 | /* last resort: use current mode */ | |
391 | if (!modes[i]) { | |
392 | /* | |
393 | * IMPORTANT: We want to use the adjusted mode (i.e. | |
394 | * after the panel fitter upscaling) as the initial | |
395 | * config, not the input mode, which is what crtc->mode | |
396 | * usually contains. But since our current fastboot | |
397 | * code puts a mode derived from the post-pfit timings | |
398 | * into crtc->mode this works out correctly. We don't | |
399 | * use hwmode anywhere right now, so use it for this | |
400 | * since the fb helper layer wants a pointer to | |
401 | * something we own. | |
402 | */ | |
403 | intel_mode_from_pipe_config(&encoder->crtc->hwmode, | |
404 | &to_intel_crtc(encoder->crtc)->config); | |
405 | modes[i] = &encoder->crtc->hwmode; | |
406 | } | |
407 | crtcs[i] = new_crtc; | |
408 | ||
409 | DRM_DEBUG_KMS("connector %s on crtc %d: %s\n", | |
410 | drm_get_connector_name(connector), | |
411 | encoder->crtc->base.id, | |
412 | modes[i]->name); | |
02f5eebb | 413 | |
7c2bb531 | 414 | fallback = false; |
02f5eebb JB |
415 | } |
416 | ||
7e696e4c DV |
417 | /* |
418 | * If the BIOS didn't enable everything it could, fall back to have the | |
419 | * same user experiencing of lighting up as much as possible like the | |
420 | * fbdev helper library. | |
421 | */ | |
422 | if (num_connectors_enabled != num_connectors_detected && | |
423 | num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { | |
424 | DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); | |
425 | DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, | |
426 | num_connectors_detected); | |
427 | fallback = true; | |
428 | } | |
429 | ||
02f5eebb | 430 | out: |
7c2bb531 | 431 | if (fallback) { |
7e696e4c | 432 | DRM_DEBUG_KMS("Not using firmware configuration\n"); |
02f5eebb JB |
433 | memcpy(enabled, save_enabled, dev->mode_config.num_connector); |
434 | kfree(save_enabled); | |
435 | return false; | |
eb1bfe80 JB |
436 | } |
437 | ||
02f5eebb | 438 | kfree(save_enabled); |
eb1bfe80 JB |
439 | return true; |
440 | } | |
441 | ||
4abe3520 | 442 | static struct drm_fb_helper_funcs intel_fb_helper_funcs = { |
eb1bfe80 | 443 | .initial_config = intel_fb_initial_config, |
4abe3520 DA |
444 | .gamma_set = intel_crtc_fb_gamma_set, |
445 | .gamma_get = intel_crtc_fb_gamma_get, | |
cd5428a5 | 446 | .fb_probe = intelfb_create, |
4abe3520 | 447 | }; |
79e53945 | 448 | |
7b4f3990 CW |
449 | static void intel_fbdev_destroy(struct drm_device *dev, |
450 | struct intel_fbdev *ifbdev) | |
79e53945 | 451 | { |
8be48d92 | 452 | if (ifbdev->helper.fbdev) { |
ddfe1567 CW |
453 | struct fb_info *info = ifbdev->helper.fbdev; |
454 | ||
79e53945 JB |
455 | unregister_framebuffer(info); |
456 | iounmap(info->screen_base); | |
4abe3520 DA |
457 | if (info->cmap.len) |
458 | fb_dealloc_cmap(&info->cmap); | |
ddfe1567 | 459 | |
79e53945 JB |
460 | framebuffer_release(info); |
461 | } | |
462 | ||
4abe3520 | 463 | drm_fb_helper_fini(&ifbdev->helper); |
79e53945 | 464 | |
8bcd4553 | 465 | drm_framebuffer_unregister_private(&ifbdev->fb->base); |
9d661251 | 466 | drm_framebuffer_remove(&ifbdev->fb->base); |
79e53945 | 467 | } |
38651674 | 468 | |
d978ef14 JB |
469 | /* |
470 | * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. | |
471 | * The core display code will have read out the current plane configuration, | |
472 | * so we use that to figure out if there's an object for us to use as the | |
473 | * fb, and if so, we re-use it for the fbdev configuration. | |
474 | * | |
475 | * Note we only support a single fb shared across pipes for boot (mostly for | |
476 | * fbcon), so we just find the biggest and use that. | |
477 | */ | |
478 | static bool intel_fbdev_init_bios(struct drm_device *dev, | |
479 | struct intel_fbdev *ifbdev) | |
480 | { | |
481 | struct intel_framebuffer *fb = NULL; | |
482 | struct drm_crtc *crtc; | |
483 | struct intel_crtc *intel_crtc; | |
484 | struct intel_plane_config *plane_config = NULL; | |
485 | unsigned int max_size = 0; | |
486 | ||
487 | if (!i915.fastboot) | |
488 | return false; | |
489 | ||
490 | /* Find the largest fb */ | |
491 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
492 | intel_crtc = to_intel_crtc(crtc); | |
493 | ||
66e514c1 | 494 | if (!intel_crtc->active || !crtc->primary->fb) { |
d978ef14 JB |
495 | DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", |
496 | pipe_name(intel_crtc->pipe)); | |
497 | continue; | |
498 | } | |
499 | ||
500 | if (intel_crtc->plane_config.size > max_size) { | |
501 | DRM_DEBUG_KMS("found possible fb from plane %c\n", | |
502 | pipe_name(intel_crtc->pipe)); | |
503 | plane_config = &intel_crtc->plane_config; | |
66e514c1 | 504 | fb = to_intel_framebuffer(crtc->primary->fb); |
d978ef14 JB |
505 | max_size = plane_config->size; |
506 | } | |
507 | } | |
508 | ||
509 | if (!fb) { | |
510 | DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); | |
511 | goto out; | |
512 | } | |
513 | ||
514 | /* Now make sure all the pipes will fit into it */ | |
515 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
516 | unsigned int cur_size; | |
517 | ||
518 | intel_crtc = to_intel_crtc(crtc); | |
519 | ||
520 | if (!intel_crtc->active) { | |
521 | DRM_DEBUG_KMS("pipe %c not active, skipping\n", | |
522 | pipe_name(intel_crtc->pipe)); | |
523 | continue; | |
524 | } | |
525 | ||
526 | DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", | |
527 | pipe_name(intel_crtc->pipe)); | |
528 | ||
529 | /* | |
530 | * See if the plane fb we found above will fit on this | |
bc104d1f CW |
531 | * pipe. Note we need to use the selected fb's pitch and bpp |
532 | * rather than the current pipe's, since they differ. | |
d978ef14 | 533 | */ |
bc104d1f CW |
534 | cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay; |
535 | cur_size = cur_size * fb->base.bits_per_pixel / 8; | |
536 | if (fb->base.pitches[0] < cur_size) { | |
537 | DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", | |
538 | pipe_name(intel_crtc->pipe), | |
539 | cur_size, fb->base.pitches[0]); | |
540 | plane_config = NULL; | |
541 | fb = NULL; | |
542 | break; | |
543 | } | |
544 | ||
545 | cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay; | |
546 | cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1); | |
547 | cur_size *= fb->base.pitches[0]; | |
548 | DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", | |
549 | pipe_name(intel_crtc->pipe), | |
550 | intel_crtc->config.adjusted_mode.crtc_hdisplay, | |
551 | intel_crtc->config.adjusted_mode.crtc_vdisplay, | |
552 | fb->base.bits_per_pixel, | |
d978ef14 | 553 | cur_size); |
d978ef14 JB |
554 | |
555 | if (cur_size > max_size) { | |
556 | DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", | |
557 | pipe_name(intel_crtc->pipe), | |
558 | cur_size, max_size); | |
559 | plane_config = NULL; | |
560 | fb = NULL; | |
561 | break; | |
562 | } | |
563 | ||
564 | DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", | |
565 | pipe_name(intel_crtc->pipe), | |
566 | max_size, cur_size); | |
567 | } | |
568 | ||
d978ef14 JB |
569 | if (!fb) { |
570 | DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); | |
571 | goto out; | |
572 | } | |
573 | ||
484b41dd | 574 | ifbdev->preferred_bpp = fb->base.bits_per_pixel; |
d978ef14 JB |
575 | ifbdev->fb = fb; |
576 | ||
484b41dd | 577 | drm_framebuffer_reference(&ifbdev->fb->base); |
d978ef14 JB |
578 | |
579 | /* Final pass to check if any active pipes don't have fbs */ | |
580 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
581 | intel_crtc = to_intel_crtc(crtc); | |
582 | ||
583 | if (!intel_crtc->active) | |
584 | continue; | |
585 | ||
66e514c1 | 586 | WARN(!crtc->primary->fb, |
d978ef14 JB |
587 | "re-used BIOS config but lost an fb on crtc %d\n", |
588 | crtc->base.id); | |
589 | } | |
590 | ||
591 | ||
592 | DRM_DEBUG_KMS("using BIOS fb for initial console\n"); | |
593 | return true; | |
594 | ||
d978ef14 JB |
595 | out: |
596 | ||
597 | return false; | |
598 | } | |
599 | ||
38651674 DA |
600 | int intel_fbdev_init(struct drm_device *dev) |
601 | { | |
8be48d92 | 602 | struct intel_fbdev *ifbdev; |
b51b32cd | 603 | struct drm_i915_private *dev_priv = dev->dev_private; |
5a79395b | 604 | int ret; |
8be48d92 | 605 | |
d978ef14 JB |
606 | if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) |
607 | return -ENODEV; | |
608 | ||
609 | ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); | |
610 | if (ifbdev == NULL) | |
8be48d92 DA |
611 | return -ENOMEM; |
612 | ||
4abe3520 | 613 | ifbdev->helper.funcs = &intel_fb_helper_funcs; |
d978ef14 JB |
614 | if (!intel_fbdev_init_bios(dev, ifbdev)) |
615 | ifbdev->preferred_bpp = 32; | |
4abe3520 | 616 | |
5a79395b | 617 | ret = drm_fb_helper_init(dev, &ifbdev->helper, |
d978ef14 | 618 | INTEL_INFO(dev)->num_pipes, 4); |
5a79395b CW |
619 | if (ret) { |
620 | kfree(ifbdev); | |
621 | return ret; | |
622 | } | |
8be48d92 | 623 | |
d978ef14 | 624 | dev_priv->fbdev = ifbdev; |
0b4c0f3f | 625 | drm_fb_helper_single_add_all_connectors(&ifbdev->helper); |
20afbda2 | 626 | |
79e53945 JB |
627 | return 0; |
628 | } | |
38651674 | 629 | |
20afbda2 DV |
630 | void intel_fbdev_initial_config(struct drm_device *dev) |
631 | { | |
b51b32cd | 632 | struct drm_i915_private *dev_priv = dev->dev_private; |
d978ef14 | 633 | struct intel_fbdev *ifbdev = dev_priv->fbdev; |
20afbda2 DV |
634 | |
635 | /* Due to peculiar init order wrt to hpd handling this is separate. */ | |
d978ef14 | 636 | drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp); |
20afbda2 DV |
637 | } |
638 | ||
38651674 DA |
639 | void intel_fbdev_fini(struct drm_device *dev) |
640 | { | |
b51b32cd | 641 | struct drm_i915_private *dev_priv = dev->dev_private; |
8be48d92 DA |
642 | if (!dev_priv->fbdev) |
643 | return; | |
644 | ||
38651674 | 645 | intel_fbdev_destroy(dev, dev_priv->fbdev); |
8be48d92 | 646 | kfree(dev_priv->fbdev); |
38651674 DA |
647 | dev_priv->fbdev = NULL; |
648 | } | |
3fa016a0 DA |
649 | |
650 | void intel_fbdev_set_suspend(struct drm_device *dev, int state) | |
651 | { | |
b51b32cd | 652 | struct drm_i915_private *dev_priv = dev->dev_private; |
1ffc5289 JN |
653 | struct intel_fbdev *ifbdev = dev_priv->fbdev; |
654 | struct fb_info *info; | |
655 | ||
656 | if (!ifbdev) | |
3fa016a0 DA |
657 | return; |
658 | ||
1ffc5289 JN |
659 | info = ifbdev->helper.fbdev; |
660 | ||
661 | /* On resume from hibernation: If the object is shmemfs backed, it has | |
662 | * been restored from swap. If the object is stolen however, it will be | |
663 | * full of whatever garbage was left in there. | |
664 | */ | |
8bcd4553 | 665 | if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) |
1ffc5289 JN |
666 | memset_io(info->screen_base, 0, info->screen_size); |
667 | ||
668 | fb_set_suspend(info, state); | |
3fa016a0 DA |
669 | } |
670 | ||
0632fef6 | 671 | void intel_fbdev_output_poll_changed(struct drm_device *dev) |
eb1f8e4f | 672 | { |
b51b32cd | 673 | struct drm_i915_private *dev_priv = dev->dev_private; |
d978ef14 JB |
674 | if (dev_priv->fbdev) |
675 | drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); | |
eb1f8e4f | 676 | } |
e8e7a2b8 | 677 | |
0632fef6 | 678 | void intel_fbdev_restore_mode(struct drm_device *dev) |
e8e7a2b8 DA |
679 | { |
680 | int ret; | |
b51b32cd | 681 | struct drm_i915_private *dev_priv = dev->dev_private; |
e8e7a2b8 | 682 | |
d978ef14 | 683 | if (!dev_priv->fbdev) |
e3c74757 BW |
684 | return; |
685 | ||
a0e99e68 | 686 | drm_modeset_lock_all(dev); |
c291be9d | 687 | |
e8e7a2b8 DA |
688 | ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper); |
689 | if (ret) | |
690 | DRM_DEBUG("failed to restore crtc mode\n"); | |
b840d907 | 691 | |
a0e99e68 | 692 | drm_modeset_unlock_all(dev); |
e8e7a2b8 | 693 | } |